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ATENA Input File Format

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1. JOINT COORDINATES 212 50 0 1 Dn BW NO O o uau OQ t BW Nme DO 2 22 23 24 25 26 21 28 29 30 3 32 33 0 00e 000 0 00e 000 0 00e 000 0 00e 000 0 00e 000 0 00e 000 0 00e 000 0 00e 000 0 5000000 0 5000000 0 5000000 0 5000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 5000000 1 5000000 1 5000000 1 5000000 2 0000000 2 0000000 2 0000000 2 0000000 2 0000000 2 0000000 2 0000000 2 0000000 2 5000000 0 00e 000 0 5000000 1 0000000 0 00e 000 1 0000000 0 00e 000 0 5000000 1 0000000 0 00e 000 1 0000000 0 00e 000 1 0000000 0 00e 000 0 5000000 1 0000000 0 00e 000 1 0000000 0 00e 000 0 5000000 1 0000000 0 00e 000 1 0000000 0 00e 000 1 0000000 0 00e 000 0 5000000 1 0000000 0 00e 000 1 0000000 0 00e 000 0 5000000 1 0000000 0 00e 000 1 0000000 1 0000000 1 0000000 0 5000000 0 5000000 0 00e 000 0 00e 000 0 00e 000 1 0000000 1 0000000 0 00e 000 0 00e 000 1 0000000 1 0000000 1 0000000 0 5000000 0 5000000 0 00e 000 0 00e 000 0 00e 000 1 0000000 1 0000000 0 00e 000 0 00e 000 1 0000000 1 0000000 1 0000000 0 5000000 0 5000000 0 00e 000 0 00e 000 0 00e 000 1 0000000 ATENA Input File Format 34 35 36 37 38 39 40 4l 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 2 5000000 2 5000000 2 5000000 2 9500000 2
2. E g DAMPING STIFFNESS COEFFICIENT 0 8 Default value HUGHES ALPHA METHOD 208 Default value 0 DAMPING MASS Defines mass matrix coefficient for proportional damping COEFFICIENT x E g DAMPING MASS COEFFICIENT 0 8 Default value 0 4 8 4 Step definition Definition of the STEP within dynamic analysis is analogous to the definition for creep step see amp CREEP STEP DEFINITION The only difference is that instead of TYPE CREEP you will know use TYPE DYNAMIC 4 8 5 Lumped masses Structural lumped masses are input as a specification of loading case They are input in the same way as concentrated loads only LUMPED MASSES keyword must be used see simple support see amp LOAD FORCES 4 8 6 Eigenvalue and eigenvectors analysis The analysis of structural eigenvalues and eigenvectors is available in any engineering module derived from CCStructures Currently it comprises modules CCStructure CCStructureCreep and of course CCStructuresDynamic It uses Inverse subspace iteration methods to find a specified number of the lowest eigenvalues and eigenvectors of the structure There are few new SET amp EIGENVALUES parameters as described below see amp SET subparameter amp ANALYSIS TYPE Table 141 amp Eigenvalue Set sub command parameters Parameter Description amp EIGENVALUES Set some parametyers for eigenvalues analysis Syntax amp EIGENVALUES NUMBER OF EIGENVAL
3. Eccentricity defining the shape of failure surface Units Acceptable range lt 0 5 1 0 gt Default value 0 52 BETA x Multiplier for the direction of the plastic flow Units Acceptable range lt minimal real number maximal real number gt Recommended range 2 2 Default value 0 0 RHO x Material density Units M P Acceptable range lt 0 maximal real number gt Default value 0 0023 f ALPHA x Coefficient of thermal expansion Acceptable range lt 0 maximal real number gt Default value 0 000012 FIXED x Fixed smeared crack model will be used Units none Acceptable range lt 0 gt Default value 0 25 FT MULTIP x Multiplier for tensile strength in the plastic part of the fracture plastic model in order to ensure that plastic surface and fracture surface intersect each other Units none Acceptable range 0 gt Default value 2 1 SHEAR FACTOR x Shear factor that is used for the calculation of cracking shear 86 AGG SIZE x UNLOADING x IDEALISATION DAMPING MASS xy DAMPING STIFF xx stiffness It is calculated as a multiple of the corresponding minimal normal crack stiffness that is based on the tensile softening law Units none Acceptable range lt 0 gt Default value 20 Aggregate size for the calculation of aggregate interlock based on the modified compression field theory by Collins When this parameter is set The shear strength of the cracked concrete is
4. 25 26 44 45 SPRING49 50 72 73 132 133 158 159 160 162 163 167 171 173 174 184 202 43 44 45 190 192 STATIC27 187 188 189 209 226 277 282 284 STEAM143 144 145 151 152 153 155 156 157 STEP11 13 14 33 34 36 37 38 44 187 188 189 190 191 192 195 196 203 208 209 217 218 219 226 228 269 277 282 284 STEP LENGTH 37 38 SEEDS oon Chase cule afe 46 STOP TIME 44 45 207 216 STORE du 13 14 230 231 STRAIN43 44 61 62 75 76 79 82 83 86 87 90 91 99 105 106 109 110 113 119 121 123 124 133 135 136 139 173 179 180 185 197 198 199 200 201 274 STRENGTH90 97 99 104 119 120 198 199 201 STRESS62 75 76 79 82 83 86 87 90 91 99 105 106 109 110 113 119 121 123 124 133 135 136 139 173 179 180 185 197 198 199 200 201 SUPPORT174 196 214 215 225 277 279 280 282 283 284 SUBREAGE 237 238 switches batch execute 9 JeXecUtes ee eet 7 9 ISILON so ore etra ee eve i i YO duet 9 T T 91 100 TASKI3 15 43 48 50 196 210 221 244 275 280 TEMPERATURE46 140 144 146 148 149 151 152 154 155 173 179 180 185 198 199 201 204 205 255 256 271 273 281 TENSILE 198 199 201 THICKNESSA9 50 56 58 59 142 143 144 146 147 149 151 152
5. PERFORMANCE INDEX Index for material performance characteristics SBETA STATE VARIABLES State variables for SBETA material model at element internal points Similar output is available also for other materials See ATENA 2D User s Manual section 2 8 5 9 Results Load step i Nodes Sbeta State Variables for details EPS MI Value of internal creep variables ELEM INIT STRAIN INCR Current element initial strain increment total from all loads for the current time step TOTAL ELEM INIT STRAIN Current element initial total strain total from all loads and all time steps ELEM INIT STRESS INCR Current element initial stress increment total from all loads for the current time step TOTAL ELEM INIT STRESS Current element initial total stress total from all loads and all time steps 198 ELEM TEMPERATURE INCR Current element incrementally applied temperatures total from all loads for the current time step ELEM TOTAL TEMPERATURE Total temperatures EPS MI Internal material variables for creep analysis using Dirichlet series BOND STRESS Bond stress between reinforcement and concrete CABLE FORCE Forces in external cables FRACTURE STRAIN Fracture strains PLASTIC STRAIN Plastic strains CRACK ATTRIBUTES Crack attributes containing the number of cracks their direction openings and su
6. nodes loaded nodes Y TYPE STRING str MERGE MERGE STRING str NO ELEM OUTPUT Example LOAD PRESTRESSING group 1 VALUE 10000 Table 112 ELEMENT LOAD description Use the above command structure to define loads applied to finite element s Currently the ATENA Input File Format 181 supported types are Volumetric mass or body load in a general direction defined as a vector in reference coordinate system amp BODY ELEMENT LOAD e g in units KN m It can be specified in global or local coordinate system Note that some elements do not define a local coordinate system in which case the option GLOBAL is the same as the LOCAL Surface edge load in a general direction defined as a vector in reference coordinate system amp BOUNDARY ELEMENT LOAD e g in units KN m the load is applied to finite nodes enlisted in the selection oaded_nodes It can be specified in global or local coordinate system Note that some elements do not define a local coordinate system in which case the option GLOBAL is the same as the LOCAL The ANY SURFACE EDGE EDGE NO DUPLICATES switch defines toward which type of element boundary is the load applicable Important one definition of a boundary load can load each element only at its one edge or surface otherwise an error is produced If you need to load more element s edges surfaces simultaneously split the load into several boundary loads EDGE NO DUP
7. 64 2 Eg CClsoGapsxee CCCircumferentialTruss Circumferential truss element This element is defined by only one node and is used in axi symmetric analysis to model circumferential reinforcement It contributes also radial stiffness E g CCCircumferentialTruss CCCircumferentialTruss2 Circumferential truss element This element is defined by two nodes and is used in axi symmetric analysis to model circumferential reinforcement It is similar to the CCCircumferentialTruss element however its cross sectional area is equal to its length multiplied by its thickness For adding stiffness also in the element s axial direction combine this element with the CCIsoASymTruss element E g CCCircumferentialTruss2 CCExternalCable 2D or 3D truss element for modeling external prestress cables The bar is anchored at one end and prestressed at the other The intermediate nodes are deviators where frictional force is defined see external geometry definition The whole bar must consist of one or more elements All the elements must compose the same element group CCBarWithBond 2D or 3D truss element for modeling reinforcement bars with specified cohesion with concrete If exceeded the bar will slip The element type uses external cable geometry definitions to specify the appropriate solution parameters The whole bar must consist of one or more elements All the elements must compose the same element group CCAhmadElem
8. IDx K TEMP GRAV FNC ID x C TEMP ID x C TEMP TEMP FNC ID x C TEMP ID x amp CCTransportMaterial PARAMS TYPE CCTransportMaterial TEMPERATURE K_TEMP_H TEMP TEMP K K_TEMP_W Th Tw TEMP GRAV K7 C_TEMP_H C C TEMP TEMP C TEMP W C C H T TEMP TEMP ID f TEMP TEMP TEMP ID fy TEMP W TEMP ID fi 1 K TEMP GRAV TEMP ID C TEMP TEMP ID 7 C TEMP TEMP TEMP ID f C TEMP W TEMP ID f7 C TEMP TEMP ID f TEMP 1 fg K TEMP TEMP ID fg TEMP W ID f K TEMP GRAV ID fg C TEMP ID f C TEMP TEMP ID f C TEMP W ID f C TEMP T FNC H ID f TEMP T ID f TEMP TEMP T ID fg TEMP W T ID f TEMP GRAV T ID fy C TEMP T ID f C TEMP TEMP T ID f C TEMP W T ID f C TEMP T FNC T ID f 1 WATER D5 D TEMP D5 DH W D D GRAV D wh wT ww eal 256 C_H_H C C TEMP C H W C2 C H T D H H FNC H ID f D TEMP ID f 1 D H W ID f D GRAV ID f C H H FNC H ID f
9. Type and data for a particular load step Currently STATIC amp STEP TYPE AND DA TA EXECUTE EXECUTE Forces the immediate execution of the steps in interval ID n7 n2 BY n3 amp STATIC STEP DEFINITION TYPE STATIC NAME step ID n LOAD CASE 7 x y Table 119 amp STATIC STEP DEFINITION command parameters LOAD CASE n x Linear combination of load cases for step step which are to be used in this step E g LOAD CASE 1 1 5 2 0 8 TRANSIENT CREEP and DYNAMIC type are available amp TRANSIENT STEP DEFINITION TYPE TRANSIENT NAME step ID n LOAD CASE x Table 120 amp TRANSIENT STEP DEFINITION command parameters Parameter Description TRANSIENT Transport analysis load step NAME step Step name in quotes that is going to be defined 188 Integral identification of the step step name LOAD CASE n x Linear combination of load cases for step step name which are to be used in this step E g LOAD CASE 1 5 2 0 8 amp CREEP STEP DEFINITION TYPE CREEP NAME step name ID n ATIRESUME time FIXED INCREMENT LOAD CASE n x Table 121 amp CREEP STEP DEFINITION command parameters Parameter Description TYPE CREEP Creep load step As creep analysis involve numerical time integration the creep step consists typically
10. Acceptable range 0 maximal real number gt ATENA Input File Format X LOC TENSION CRACK SPACING x TENSION STIFF x 93 Default value 0 03 f Generation formula none Strain value after which the softening hardening becomes localized and therefore adjustment based on element size is needed Format X LOC TENSION x Units none Acceptable range 0 maximal real number Default value 0 0 Generation formula none Crack spacing average distance between cracks after localization If zero crack spacing is assumed to be equal to finite element size Units 1 Acceptable range lt 0 maximal real number gt Default value 0 0 Tension stiffening Units none Acceptable range lt 0 1 gt Default value 0 0 94 Compressive properties COMP SOFT HARD FUNCTION CHAR SIZE COMP X LOC COMP Index of the function defining the tensile hardening softening law The horizontal axis represents strains and vertical axis compressive strength which should be normalized with respect to f Format COMP SOFT HARD FUNCTION 7 Units none Acceptable range lt 1 maximal int number Default value none Generation formula default function should have the following points 0 000 0 25 0 5 FC E 0 80 FC E 1 00 FC E 0 005 0 00 Characteristic size for which the various compressive functions are valid Format CHAR SIZE COMP x Units 1 Acceptable range 0 maximal real number gt De
11. C TEMP FNC H ID f C H W FNC ID f C H T FNC H ID f D TEMP ID f D TEMP TEMP ID f D H W TEMP ID f D GRAV TEMP ID f C TEMP ID f2 C TEMP FNC TEMP ID f C W TEMP ID f C H T TEMP ID f D H H FNC T ID f D TEMP FNC T ID fj D H T ID fp D GRAV FNC T ID fj C H H FNC T ID f C H TEMP FNC T ID f C H W FNC T ID f IC H T FNC T ID f amp CCTransportMaterialLevel7 PARAMS TYPE CCTransportMaterialLevel7 SPECIFIC ID DOH25 FNC ID B1 val B2 val ALPHAINF val ETA val A va OC H POT val OW POT val TH_INIT val ALPHA INIT val INCR MIN val MAX val TEMPERATURE INCR MAX val CEMENT MASS val AGGREGATE MASS val FILLER MASS val CEMENT DENSITY val WATER DENSITY val AGGREGATE DENSITY val FILLER DENSITY ival C_AGGREGATE TEMP TEMP val C FILLER TEMP TEMP va C CEMENT TEMP TEMP val C WATER TEMP TEMP val AGGREGATE TEMP TEMP val FILLER TEMP TEMP val CEMENT TEMP TEMP val WATER TEMP TEMP val AIR TEMP TEMP val W val H80 val W80 val TEMPO val A WV val A W val MI WV val TEMPO ICE val WV ICE val
12. DAMPING STIFFNESS COEFFICIENT x MASS COEFFICIENT x amp REGRESSION DATA 1 amp REGRESSION DATA 28 REGRESSION MODE mode id OMEGA omega val KSI ksi_val WEIGHT weight val CALCULATE Table 8 amp TRANSIENT sub command parameters TIME CURRENT x TIME INCREMENT x TIME INTEGRATION type of temporal integration scheme If this parameter is not input then Newmark integration will be used CRANK NICHOLSON Use linear trapezoidal integration parameter for trapezoidal integration By default 0 5 Several other linear temporal integration may be utilized depending on the 0 e g implicit Newton integration for 0 1 explicit integration for 0 0 etc For good compromise between convergence and possibility of oscillations values about 0 0 85 is recommended ADAMS BASHFORTH Adams Bashforth quadratic temporal integration NEWMARK BETA x Defines the Newmark s 8 parameter NEWMARK GAMA x Defines the Newmark s parameter HUGHES ALPHA x Defines the Hughes damping parameter DAMPING STIFFNESS Defines stiffness matrix coefficient for proportional damping E g DAMPING STIFFNESS COEFFICIENT 0 8 DAMPING MASS Defines mass matrix coefficient for proportional damping 8 DAMPING MASS COEFFICIENT 0 8 DAMPING Generate proportional damping coefficient based on input of REGRESSION MODE modal damping parameters ksi val mode id is id of an mode id OMEGA
13. FRICTION FT RT F_T R_T x TENSION SOFT HARD FUNCTION COHESION SOFT HARD FUNCTION 7 MINx K TT MIN x RESET DISPLS n Table 76 amp INTERFACE MATERIAL sub command parameters Parameter Description Basic properties K_NN KNN x Normal stiffness Units F P Acceptable range 0 maximal real number gt Default value 200 x 10 f f K_TT KTT Tangential stiffness Units Acceptable range 0 maximal real number Default value 200 x 10 f f FT RT F T R T x Tensile strength Units F P Acceptable range 0 maximal real number Default value 0 f f COHESION x Available starting from ATENA version 4 3 1 126 FRICTION x TENSION SOFT HAR D_FUNCTION COHESION SOFT HA RD FUNCTION Units F Acceptable range 0 maximal real number gt Default value 0 0 f f Friction coefficient If zero interface behaves like a no tension element and full contact in compression is assumed Units none Acceptable range 0 maximal real number Default value 0 0 Function which defines uniaxial relative stress displacement relationship Relationship should be defined as a set of points starting from 0 0 and only positive values should be specified X coordinates of this function mean normal displacement units 1 range lt 0 maximal real number Y coordinates represent the relative tensile strength with respect to FT units NONE range
14. 4 10 1 5 The parameter EQUIDISTANT The keyword equidistant ensures equidistant distribution of finite elements within an entity It can be used for any entity with exception of vertices e g curve surface region etc Except for curves the equidistant property is only applicable for an entity which is created via a procedure of mapping For curves it is applicable subject to no vertices are fixed to that curve To alleviate this restriction create a copy of the curve split it to more curves already without a fixed vertex and fixed them to the original curve Note that the EQUIDISTANT property is automatically propagated to all neighboring entities ATENA Input File Format 239 Example surface 11 curve 102 100 103 12 equidistant The subcommand EQUIDISTANT can also be used for unstructured meshes In this case however no curve with the EQUIDISTANT property is allowed to have fixed vertices and splitting of a copied curve as described above will help Note also that the EQUIDISTANT is not always 100 accurate especially in case of a higher order meshes 4 10 1 6 The subcommand OUTPUT The subcommand OUTPUT is used to explicitly control whether a generated entity should be output to ATENA or not It works in the same way as the OUTPUT parameter from entity definitions Its main use is to allow editing of FE data from the T3D generator Suppose you have a T3D model that has been already used to generate a FE model into
15. CHARACTERISTICS TICS eigenvectors ana ysis CONVERGENCE CRITERIA Parameters assessing convergence performance ARC LENGTH PARAMS Parameters relevant for Arc Length method LINE SEARCH PARAMS Parameters relevant for Line Search method STEP CONVERGENCE Values of convergence characteristics as printed in message file LOAD CASES CONTRIBUTION Load cases contribution i e sums of load cases coefficient from the previous steps multiplied by step lambda factor Note that this values can only be monitored after step not in iterations USER LOAD CASES CONTRIB Same as the above but it prints out only user UTION defined load case Internally generated load cases are skipped e g connection between reinforcement and surrounding solids PUSHOVER ANALYSIS PARA Input parameters and results for of Pushover MS analysis Note that the analysis is available only for static analysis without creep Table 126 Output type keywords understood by the command amp OUTPUT for the location type LOAD CASES Output keyword SUPPORT SLAVE NODES List of slave nodes in specification of LHS boundary conditions SUPPORT MASTER NODES List of master nodes in specification of LHS boundary conditions LOAD SLAVE NODES List of slave nodes in specification of RHS boundary conditions i e nodal loads MASTER SLAVE NODES For each Master Slave BC lists id of slave and master nodes together with their recommended values ATENA In
16. EXECUTE command Note that it is possible at any time to modify the finite element model by adding modifying or removing various modeling entities The STEP EXECUTE command uses always current settings of the finite element model Table 2 Main input commands amp ELEMENT Element properties definition 14 Message output redirection Store current analysis 000000000002 amp STORE Store current analysis amp UNITS amp DLL NAME Name of dynamic link library by which processor the following commands should be processed Currently DLL NAME is CCFEMODEL CCSTRUCTURES CCSTRUCTURES CREEP amp EMPTY Forces the current DLL command processor to return to its root position i e its main commands level amp RETARDATION TIMES amp HISTORY IMPORT Import humidity and temperature history for creep analysis amp TERMINATE Immediately terminates the input commands stream amp SELECTION Define list of entities e g nodes that are later used in another command e g definition of boundary conditions amp STATIC INITIAL CON Set structural initial conditions at nodes such as reference DITIONS tepmeratures module name Sets a top level for command parsing module name must be name of ATENA s FEM module Default nil E g CCStructures This is to indicate end of the current input command Control is returned to the top level specified by module_name for parsing a next command Must be preceded by at least
17. RT F T R_T x FC RC F C R x TENSION SOFT HARD FUNCTION CHAR SIZE TENSION X LOC TENSION CRACK SPACING x TENSION STIFF x COMP SOFT HARD FUNCTION x CHAR SIZE COMP LOC COMP x FC REDUCTION FUNCTION n SHEAR STIFF FUNCTION 7 X LOC SHEAR x SHEAR STRENGTH FUNCTION TENSILE STRENGTH RED FUNCTION EXC x BETA x RHO x ALPHA x FT MULTIP SHEAR FACTOR x UNLOADING x ATENA Input File Format 91 IDEALISATION 1 PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D DAMPING MASS x DAMPING STIFF xx This material is identical to the previous material 3DNONLINCEMENTITIOUS2 but it allows the user definition of the basic material curves such as tensile softening compression softening shear behavior of cracked concrete and tensile strength reduction based on the applied compressive strength The parameters for this material model can be generated based on compressive cube strength of concrete Table 65 This value should be specified in MPa and then transformed to the current units See ATENA theory manual for more detailed explanation of this material Table 68 Parameters for MATERIAL TYPE CC3DNonLinCementitious2User Suitable for rock or concrete like materials Parameter Description Basic properties cu E Elastic modulus Format E x Units 17 Acceptable range 0 maximal real number Default value 30 x 10 f f Generation formula E 6000 15 5R R f f t
18. ns 4 2 3 Command amp GEOMETRY Syntax amp GEOMETRY GEOMETRY ID n NAME geometry TYPE amp GEOMETRY SPEC Table 40 amp GEOMETRY command parameters Parameter Description e g ID n User defined geometry name in quotes also for identification E g NAME geometry Geometry type in quotes and other geometry type dependent parameters see amp GEOMETRY SPECIFICATION amp GEOMETRY SPEC amp 2D GEOMETRY SPEC amp 3D GEOMETRY SPEC amp TRUSS GEOMETRY SPEC amp SPRING GEOMETRY SPEC amp EXTERNAL CABLE GEOMETRY SPEC amp BEAM GEOMETRY SPEC amp LAYERED SHELL GEOMETRY SPEC amp BEAM 3D SPEC amp BEAM 1D SPEC amp 2D GEOMETRY SPEC 2D THICKNESS IDS node node2 REF VECTOR x y 2 Table 41 amp 2D GEOMETRY SPEC sub command parameters Parameter Description THICKNESS Thickness of the two dimensional object E g THICKNESS REF IDS nodel Define position of an arbitrary vector v1 used throughout node2 definition of local coordinate system for plane 3D and 2 5D 50 elements The vector is set by coordinates of finite element nodes node tail and node2 head If it is input it s projection into the element plane will yield X local coordinate axis Otherwise the procedure of establishing X local is written in the Atena theoretical manual REF VI 2 Same as tha above but the arbitrary
19. 1 FE nodes Sort entries in the selection according to Z Z their reference coordinates Note that sorting is executed immediatelly and thus it makes sense only for selection with all their entries either previously inputed or with executed thier generation For example SORT X sort nodes referenced in the selection according with respect to their x coordinate from minimum t maximum SORT X the same but in reverse order SORT X Y Z sort nodes with reference coordinates x y z with respect to the value x y z By default no sorting is applied REMOVE Remove the modified selection list GENERATE NODES Data for the selection list generation The list will ELEMENT OF include either all nodes or all elements of the group GROUP GROUP_ FROM lt group_id group id to from within a box defined group GROUP TO by the macro nodes i thru i8 for 3D case or a group id to 3 WITHIN BOX quadrilateral defined by i thru i4 2D case If MACRO NODES i i2 i3 i4 i5 group id is specified elements generated 16 i7 18 EXECUTE otherwise nodes are generated The EXECUTE keyword forces to carry out the generation immediately Otherwise it is done prior a first step execution SOURCE NODE SELECTION Only nodes from selection sel nodes become sel nodes candidates for the generation If not specified all nodes from the model are considered SOURCE GROUP SELECTION Only elements
20. By default relative negligible size is set to 1E 5 Negligable values for norm of residual forces displacements that can be ignored By default they are set to 1 E 11 E g SET Absolute error Negligible residual 0 1 ATENA Input File Format 35 Relative error Negligible residual 0 2 ITERATION LIMIT n Limit on number of iterations within each step E g ITERATION LIMIT n amp SOLUTION METHOD LINEAR NEWTON RAPHSON NEWTON RAPHSON AND LINE SEARCH ARC LENGTH AND LINE SEARCH MODIFIED NR FULL NR Table 14 SOLUTION METHOD sub command parameters NEWTON RAPHSON Use Newton Raphson nonlinear solver ARC LENGTH Use Arc Length nonlinear solver Recommended for force loading up to peak load or behind can scale reduce the load Only for static analysis ie not for probems involving time transport creep nor dynamic analyses NEWTON RAPHSON AND LINE SEARCH Use Line Search nonlinear solver in combination with Newton Raphson method ARC LENGTH AND LINE SEARCH Use Arc Length nonlinear solver in combination with Use Line Search nonlinear solver Use linear solver Note that geometrical non linearity is disregarded and only linear material can be used MODIFIED NR Build stiffness matrix only in the 1 iteration and use it also for subsequent iteration of the step FULL NR Build new stiffness matrix in each iteration amp PREDICTOR TYPE ELASTIC PREDICTOR TANGENTIAL PREDICTOR
21. UPDATE IP EACH ITERATION that material points i e integration points should be updated at the end of each iteration within a load increment It means that stress increments are calculated with respect to the beginning of previous iteration By default material points are updated with respect to loading increments i e steps See also SET UPDATE IP EACH STEP amp ARC LENGTH PARAMS amp ARC LENGTH TYPE amp CONSTRAINT LENGTH CONTROL amp LOAD DISPLACEMENT RATIO amp LOCATION PARAMS Table 17 LENGTH PARAMS sub command parameters Parameter Description amp ARC LENGTH TYPE Set type of Arc Length method and associated constrain amp CONSTRAINT LENGTH CONTROL Set several parameters that control Arc Length method ATENA Input File Format 27 amp LOAD DISPLACEMENT RATIO Control load displacement scale for calculating Arc Length constrain amp LOCATION PARAMS Set location where the Arc Length step length and or Line Search energy criterion should be calculated LENGTH TYPE CRISFIELD NORMAL UPDATE CONSISTENTLY LINEARISED EXPLICIT ORTHOGONAL Table 18 LENGTH TYPE sub command parameters CRISFIELD Crisfield variant of constant step length including loading space is to be used NORMAL UPDATE Updates of displacements within iteration kept normal to displacements within the step CONSISTENTLY LINEARISED Keeps constant projection of step length in t
22. Units __ MPa day 1 Default value 1 7 _ MPa day 142 Cl x Proportionality constant in computing the change of capillary tension MP Units 4 K Default value 4 CREEP DEGREE Degree of creep function Units None Default value 0 04 VOLUME POW x The power of volume fraction Units None Default value 0 5 LAMBDAO x Slope of creep function Units None Default value 1 4 3 9 Creep Materials The creep material definition includes a model for short term material properties and a model for their variation in time The former model is called BASE material model while the latter one is CREEP model The base model can be any material model that is written in incremental form Models written in total formulation are not compatible with creep analysis SHORT TERM MATERIAL DATA entry comprises all short term material parameters listed in a section describing the short term material starting with short tem material type name in quotes Syntax amp CREEP MATERIAL TYPE amp CCModelB3 DATA amp CCModelB3Improved DATA amp CCModelBP KX Data amp CCModelCEB FIP78 DATA amp CCModelACI78 DATA amp CCModelCSN731202 DATA amp CCModelBP1 DATA amp CCModelBP2 DATA amp CCModelGeneral DATA amp CCModelFIB 2010 DATA amp CCModelEN1992 DATA BASE TYPE MATERIAL short term material type name SHORT TERM MATERIAL DATA The parameter BASE contains material typ
23. f shrinkage etc The ratio of f f fo 28days may be used for overiding short f Note that material compliance rigidity is overwritten always Default value 35100 kPa The parameter f 28days If specified by a positive value this value is used to calculate f and overide the corresponding value in the base material If it is specified as any negative value f 28days is calculated by FIB MC2010 based f 28 days Othewise the value in the base material remains unchanged Default value 0 MPa 148 GF28 The parameter fracture energy G 28days If specified by a positive value this value is to calculate G f and overide the corresponding value in the base material If it is specified as any negative value G 28days is calculated by FIB MC2010 based on f 28days Othewise the value in the base material remains unchanged Default value 0 MPa FT28 f The parameter tensile strength f 28days If specified by a positive value this value is used to calculate and overide the corresponding value in the base material If it is specified as any negative value f 28days is calculated by FIB MC2010 based on f 28 days Othewise the value in the base material remains unchanged Default value 0 MPa E28 E Short term material Young modulus at 28 days i e inverse compliance at 28 01 days loaded at 28 days kPa It is used by the creep model to predict ma
24. rad w t D rav wT t w 8 g ww W Ostates for total amount of moisture per unit volume kg m and total amount of energy ATENA Input File Format 259 per unit volume J m Note that positive value of C C causes consumption so that e g hydration heat must be input as negative number Input always a label followed by an associated real value for constant parameter or integer id of a previously defined function for a function definition If a parameter is skipped it is assumed either zero or the associated function is assumed to have value 1 i e neglected The T subscript for temperature related parameters is replaced by TEMP string The subscripts for humidity water content and time i e sink related terms remain unchanged i e H W t respectively For example is entered as C TEMP TEMP etc All functions are defined separately Each such a definition is refered by its id i e a integer number This integer is then specified as a value following the appropriate label For example the function Sen t is defined with id Then the material data input would read C TEMP TEMP FNC ID k Significance of the parameters is as follows Cn Cs fc M fe T fe O Crp Cr f M fe T fe O Cre Cs fc M fe D fc O Cn Cs fc M fe T fe 0 Con Con D O Cur Cor fe 00 fe fe 0 Cow Cow fo fe T fe 0 Cw Cn fc T fc T Kus OL ORO
25. Acceptable range minimal real number maximal real number gt Default value 0 0 f If Selig tebe pms o behavior parameters Scaling of the initial yield surface If equal to 0 no cycling behavior is considered For values greater than 0 Bauschinger effect is included If equal to 1 Format R x Units none Acceptable range lt 0 1 gt Default value 0 7 0 no Bauschinger effect considered Bauschinger hardening slope Format K1 x Units 17 Acceptable range 0 maximal real number Default value 74 000 f f ATENA Input File Format 121 K2 Bauschinger memory Format K2 x Units none Acceptable range 0 maximal real number Default value 1000 RHO x Material density Units M P Acceptable range 0 maximal real number Default value 0 00785 f f ALPHA x Coefficient of thermal expansion Units 1 T Acceptable range lt 0 maximal real number gt Default value 0 000012 DAMPING MASS x Mass and stiffness damping factors specified for indiviual DAMPING STIFF xx element group They overwrite the same factor set for the whole structure by SET command IDEALISATION Defines the idealisation if material model with higher dimension is to be used in a finite element with lower dimension For instance in case a 3D model is to be used in 2D configuration Units none Acceptable range 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D Default value program tries to dete
26. Default SN BR i 244 Example N Bar i In this case e g all finite nodes associated with a reinforcement bar 13 will be listed in a selection list that calls N Bar13 DEF REINFORCEMENT FM The same definition as the above for T FOR PRINCIPAL NODES DEF VERTEX FMT FOR NODES however it prc fmt applies for principal nodes of reinforcement bars The list will also include boundary nodes i e it 1s expanded list Default N PBR i Example N PrincBar i In this case e g all finite nodes associated with a principal nodes of a reinforcement bar 13 will be listed in a selection list that calls N PrincBar13 DEF CURVE FMT FOR ELEMEN The same formatting strings as the above but they TS curveNODES melement fmt are used to assign names to generated list of finite DEF PATCH FMT FOR ELEMEN Clements ud cl Default 5 9 9 SESP i E S i DEF SURFACE FMT FOR ELEM SESH i SESMES 1 REN 0 4 ENTS surface_fmt SESBR 01 DEF SHELL FOR ELEMENT F ample N MacroNode i S shell fmt In this case e g all finite nodes associated with a DEF REGION FMT FOR ELEME region 13 will be listed in a selection list that calls NTS region fmt N Region13 DEF MELEMENT FMT FOR ELE MENTS melement_fmt DEF BAR REINFORCEMENT FM T FOR ELEMENTS c fint 4 10 3 The Command amp MACRO JOINT Syntax amp MACRO JOINT MACRO JOINT amp C
27. K WATER TEMP TEMP val Heat conductivity of water 4 Units energy length time temperature Default value 0 604 J m second C K AIR TEMP TEMP val Heat conductivity of air 4 Units energy length time temperature Default value 0 035 J m second C Free water saturation w Units mass length Default value 127 kg m Relative humidity for wy Units Default value 0 8 Water saturation Ww for Agg Units mass length Default value 40 kg m TEMPO val Parameter 7 to calculate saturaturated water vapour pressure for temperatures T20 C 264 Units temperature Default value 234 18 C Parameter a to calculate saturated water vapour pressure for temperatures Tou Units Default value 17 08 W val Water absorption coefficient A Units mass lengthtime Default value 0 01 kg m second Water vapour diffusion resistance factor Units Default value 210 TEMPO ICE val Parameter 7 to calculate saturatated water vapour pressure for temperatures T 0 C Units temperature Default value 272 44 C A WV ICE val Parameter a to calculate saturated water vapour pressure for temperatures lt 0 Units Default value 22 44 EA val Acxtivation energy Units energy mol Default value 38300 J mol All remaining input data in the sections They are the same those for TEMPERATURE and WATER amp CCTransportMaterial PARAMS exce
28. MODIFIED HC CONVECTION EMISSIVITY 1 TEMPERATURE MAX 7 TEMPERATURE MIN T g min TIME FUNCTION time_id NODES boundary nodes list EDGE EDGE NO DUPLICATES SURFACE Important Note that unlike other types of static loads that are input in incremenental manner the fire boundary load has character of a load potential and thus it must be input in total form Therefore the load describes total fire load conditions Table 173 FIRE BOUNDARY LOAD parameters for element load Parameter Description FIRE TYPE GENERIC Type of fire load to be applied NOMINAL HC MODIFIED HC USER CURVE CONVECTION 2 Convection heat transfer coefficient W m2 K Default value 50 W m K EMISSIVITY Emissivity parameter Default value 0 56 TEMPERATURE MAX T Max temperature parameter gref TIME FUNCTION time id Id of an user defined time dependent function It acts as an extra multiplier of the generated or directly inputed fire boundary load TEMPERATURE MIN T min Ambient temperature prior the fire broke up Any generated temperature cannot fall below this value 272 NODES boundary_nodes list List of boundary load that are load EDGE EDGE NO DUPLICATES Type of boundary load that is applicable for the given fire load For explanation see amp BOUNDARY ELEMENT LOAD SURFACE amp MOIST TEMP BOUNDARY LOAD MOIST TEMP BOUNDARY amp ELEM LOAD DATA
29. MPa FUNCTION a Function which defines uniaxial stress strain relationship Relationship should be defined as a set of points starting from 0 0 and only positive values should be specified Same relationship will be used in compression Units none Acceptable range 1 maximal integer Default value none see command amp FUNCTION RATIO x Cross sectional area ratio of the smeared reinforcement with respect to the base material Units none Acceptable range lt 0 1 gt Default value 0 01 RHO x Material density Units M P Acceptable range lt 0 maximal real number gt 132 Coefficient of thermal expansion Units 1 T Acceptable range lt 0 maximal real number gt Default value 0 000012 F MULTIP x Function multiplier Can be used to scale the function defining the stress strain relationship Units none Acceptable range 1 maximal real number Default value 1 0 4 3 7 Material Type for Spring 4 3 7 1 Sub command amp SPRING Syntax amp SPRING TYPE CCSpringMaterial Kx FUNCTION n DAMPING MASS xy DAMPING STIFF xx Table 81 amp SPRING sub command parameters Parameter Description Basic properties Kx Initial stiffness Units F l Acceptable range 0 maximal real number gt Default value 1000 0 DAMPING MASS x Mass and stiffness damping factors specified for indiviual DAMPING STIFF xx element group They overwrite the same factor set for the whole ES structure by SET co
30. Units stresses Default value 0 XK OUTPLANE Characteristic material out of plane tensile strength in bending F XK x positive This input is not used if the corresponding design value is given Units stresses Default value 0 R RATIO x Ratio of mortar thickness to the wall thickness Units none Default value 1 GAMMA Mx Partial factor of safety Units none Default value 1 Design material compressive strength negative Units stresses Default value 0 Design material shear strength positive Units stresses Default value 0 Design material in plane tensile strength in bending positive Units stresses Default value 0 XD Design material out of plane tensile strength in bending x positive Units stresses Default value 0 EPS MUx Maximum compressive strain at the comers of cross section negative 166 Units none Default value 0 0035 Maximum compressive strain at the centre of cross section negative Units none Default value 0 002 LAMBDA x Coefficient to reduce compressed masonry area Units none Default value 1 ETAx Coefficient to apply for F_D Units none Default value 0 8 REL TOL x Relative acceptable error in moments forces Units none Default value 0 001 ITER MAX n Maximum number of iterations for zeroizing of lateral bending moment Note that the moments are calculated in a coordinate system whose Y axis is parallel t
31. amp CCModelACI78 sub command parameters Parameter Description CONCRETE Type of concrete Only type 1 and 3 are supported CRORE ANDE Default value 1 THICKNESS thick Ratio volume m surface area m of cross section For long ATENA Input File Format 153 elements it is approximately cross sectional area m perimeter m Default value 0 0767 m FCYL28 fcyl28 Cylindrical material strength in compression kPa Default value 35100 kPa HUMIDITY humidity Ambient relative humidity 0 3 1 Default value 0 780 DENSITY density Concrete density kg m Default value 2125 kg m Total aggregate cement ratio Default value 7 04 Default value 0 63 Default value 2 8 SLUMP slump Slump value m Default value 0 012m AIR CONTENT air Air content 96 Default value 596 WATER AIR conditions either under in water or air under normal STEAM CURING temperature conditions WATER AIR or steam condition 5 Default value AIR END OF CURING Time at beginning of drying i e end of curing days TIME Default value 7 days LOAD CURRENT Current or load time for the subsequent measured value PRIME mE Default 0 days SHRINKAGE Measured shrinkage measured val for previously specified measured val load and current time Unit of shrinkage is dimension less amp CCModelCEB FIP78 DATA CCModelCEB FIP78 THICKNESS thick FCYL28
32. amp ELEMENT TYPE Define a new element type This element type is later referred to by the sub command amp ELEMENT GROUP to specify an element type formulation for an element group amp ELEMENT INCIDENCES This sub command should follow the command ATENA Input File Format 61 amp ELEMENT GROUP It is used to define element connectivities amp ELEMENT MATERIALS This sub command should follow the command amp ELEMENT GROUP It sets material types individually for each material point of the element If not specified default material type from amp ELEMENT GROUP is used amp ELEMENT GROUP GROUP ID n NAME element group TYPE MATERIAL n GEOMETRY n DELETE ACTIVE INACTIVE ASSOC LC ID c id Table 51 amp ELEMENT GROUP sub command parameters Parameter Description E g ID n name E g NAME element group name E g TYPE n MATERIAL n Identification number of material to be used for this element group E g MATERIAL n GEOMETRY n Identification number of geometry to be used for this element group E g GEOMETRY n DELETE Resets content of the element group to default i e removes its all previous input data ACTIVE INACTIVE Marks all elements within the group as active or inactive Active elements are included in the analysis whereas inactive elements are ignored ASSOC LC ID c id Associated load case id This input is generated automatically however in some cases it all
33. amp LOAD DISPLACEMENT amp LOAD FORCES amp LOAD MASTER SLAVE NODES amp RIGID BODY amp INVERSE RIGID BODY NL CONNECTION amp ELEMENT LOAD Table 105 General notes on LOAD command The following are general notes on input of boundary conditions e Load case ids gt 900000 are reserved for internal use thus input id lt 900000 e Specified boundary condition of any type has cumulative character i e if a loading force in a specified degree of freedom is input three times the actual loading force is tripled The specified boundary conditions are incremental i e they set change in a particular loading step execution time with respect to the previous step previous time amp LOAD DISPLACEMENT SUPPORT amp DISPLACEMENT TYPE amp LOAD FUNCTION amp COMPLEX LOAD DISPLACEMENT amp SIMPLE LOAD DISPLACEMENT amp SPRING DEFINITION amp DISPLACEMENT TYPE TYPE DISPLACEMENT VELOCITY ACCELERATION Note that displacements boundary conditions i e type DISPLACEMENT are treated as incremental displacements load whilst in case of velocities and or accelerations i e type VELOCITY or ACCELERATION the input values are considered to be total load not incremental load Hence VELOCITY and or ACCELERATION BCs because of its total character must be specified in the group of fixed load within the dynamic load step definition On the other hand DISPLAC
34. da t where c is load multiplier fo 2 f f are values of the total and increment load functions at time 1 f and 41 is time at current and previous step respectively The above formula is applicable for loads that have incremental character For loads with total character the load multiplier is calculated by C dus t Jui t Examples of such total loads are amp MASS ACCELERATIONS amp CHLORIDES amp CARBONATION amp FIRE BOUNDARY amp MOIST TEMP BOUNDARY LOAD boundary conditions with amp DISPLACEMENT TYPE VELOCITY or ACCELERATION etc Of course in practice you use either f t or fpa t Nevertheless theoreticaly both ATENA Input File Format 179 functuions can be used in the same time If any of f t fa t is not specified its value is assumed equal one for any If neither INCREMENT nor TOTAL keyword is given then INCREMENT is assumed Note that the function applies only to fixed boundary constraints from amp LOAD VALUE and or from amp ELEMENT LOAD and not to master slave DOFs constrains if the master is not fixed Even if it is fixed it applies only to its amp LOAD VALUE part It cannot be specified for the amp LOAD MASTER SLAVE NODES because the slave degree of freedoms inherit this function from their master degrees of freedom amp ELEMENT LOAD LOAD amp LOAD FUNCTION amp LOAD FUNCTION INITIAL amp BODY ELEMENT LOAD amp BOUNDARY ELEMENT LOAD am
35. that is used for the calculation of cracking shear stiffness It is calculated as a multiple of the corresponding minimal normal crack stiffness that is based on the tensile softening law Units none Acceptable range lt 0 maximal real number gt Default value 20 Unloading factor which controls crack closure stiffness Acceptable range lt 0 1 gt 0 unloading to origin default 1 unloading direction parallel to the initial elastic stiffness Defines the idealisation if material model with higher dimension is to be used in a finite element with lower dimension For instance in case a 3D model is to be used in 2D configuration Units none Acceptable range 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D Default value program tries to determine a suitable idealisation based on the dimension of the material model and the dimension of the finite element where it is used So in most cases it is not needed to use this command In certain cases however the program cannot determine correctly the idealisation to use such a case is for instance if a 3D model is to be used in 2D element Then it is necessary to directly specify if plane stress or strain idealisation is to be used Mass and stiffness damping factors specified for indiviual element group They overwrite the same factor set for the whole structure by SET command FC 20 30 40 50 60 70 E 24371 27530 30011 320
36. use n threads during the execution By default all available processor s cores are used num unused threads m same as the above but Atena will use number od processor s available threads minus The parameter num threads 7 has higher priority num iters per thread m chunk size for dynamic schedule 0 for static load distribution default 0 inp precedes the Input File name ATENA Studio derives the out msg and err filenames from the inp filename by replacing the extension Table 1 Environmental variables for AtenaConsole AtenaWin and ATENA Studio execution Command AtenaConsole 32 bit execution AtenaConsole Basic AtenaConsole command by default executes statics module AtenaConsoleD AtenaConsole execution for dynamics analysis AtenaConsoleC AtenaConsole execution for creep analysis AtenaConsoleT AtenaConsole execution for transport analysis AtenaConsole 64 bit execution AtenaConsole64 Basic AtenaConsole 64 bit execution by default executes statics module AtenaConsoleD64 AtenaConsole 64 bit execution for dynamics analysis AtenaConsoleC64 AtenaConsole 64 bit execution for creep analysis AtenaConsoleT64 AtenaConsole 64 bit execution for transport analysis AtenaWin 32 bit execution AtenaWin Basic AtenaWin command by default executes statics module AtenaWin program can be used for runtime visualization of the analysis progress and postp
37. x WDx EPS SHEAR x ISOFT x Clx C2x C3x CSOFTx COMPREDx CDx CSx ROTATED CRACKS RHOx ALPHA DAMPING MASS DAMPING STIFF xx m The parameters for this material model can be generated based on compressive cube strength of concrete see Table 72 This value should be positive specified in MPa and then cu transformed to the current units Table 72 amp CCSBETAMATERIAL sub command parameters Parameter Description Basic Ex Elastic modulus Units 17 Acceptable range 0 maximal real number ATENA Input File Format MU POISSON NY X FT RT F T R Tix FC RC F C R 115 Default value 30 x 10 f f Generation formula 6000 15 5R JR f f this formula is valid only if is compressive cube strength given as positive number in MPa Poisson s ratio Units none Acceptable range 0 0 5 Default value 0 2 Tensile strength Units 17 Acceptable range 0 maximal real number Default value 3 f f 2 Generation formula FT 0 24R3 fI f Compressive strength Units 17 Acceptable range minimal real number 0 Default value 30 f f Generation formula FC 0 85 R fpl f Tension ISOFT x Type of tension softening Units none Acceptable range lt 1 0 5 0 gt 1 0 Exponential 2 0 Linear 3 0 Local strain 4 0 SFRC 5 0 SFRC local strain Default value 1 0 Case ISOFT 1 0 Exponential Specif
38. 0 005 0 01 Strain value after which the softening hardening becomes localized and therefore adjustment based on element size is needed Format X LOC SHEAR x Units none Acceptable range lt 0 maximal real number Default value 0 0 Generation formula none ATENA Input File Format SHEAR STRENGTH _ FUNCTION n 97 Index of the function defining the shear strength of a cracked concrete based on crack width in the crack direction The horizontal axis represents strains and the vertical axis the relative value of shear strength with respect to the tensile strength FT Format SHEAR STRENGTH FUNCTION n Units none Acceptable range lt 1 maximal int number gt Default value none Generation formula default function should have the following points 0 00000 1 10 0 0001 0 87 0 0005 0 51 0 0010 0 34 0 002 0 20 0 003 0 15 0 005 0 09 0 010 0 05 NS N Tension compression interaction TENSILE STRENGTH RED FUNCTION Index of the function defining the tensile strength reduction based on the compressive stress in other material directions The horizontal axis represents relative compressive stress normalized with respect to f and the vertical axis the relative reduction of the tensile strength with respect to f Format TENSILE STRENGTH RED FUNCTION n Units none Acceptable range 1 maximal int number Default value none Genera
39. 145 151 152 153 155 156 157 255 257 281 WD76 77 79 81 83 84 86 88 90 99 106 108 114 118 121 122 X 13 48 49 53 54 64 66 68 70 71 90 93 94 96 99 102 103 111 126 173 178 179 291 180 185 206 207 217 235 236 244 267 268 271 272 XVALUNBS itt rere 226 2776 og ETE 180 185 180 185 Y Y 13 49 53 54 62 64 70 71 75 76 77 79 83 86 87 90 99 106 114 115 119 120 121 122 123 124 126 134 137 173 178 179 180 185 206 207 235 236 267 268 271 272 280 YIBLD esiste 119 120 198 199 201 YVALCUE S 226 276 NA cx 180 185 YZ 180 185 Z Z 53 54 55 70 71 178 179 180 185 206 207 235 236 267 268 271 272 LX oae 180 185 180 185
40. 271 272 274 276 277 278 282 ELEMENTS11 22 46 193 194 195 197 202 203 240 244 271 273 EPS C79 81 83 84 86 88 90 99 106 107 114 117 EPS CP 79 81 83 84 86 88 90 99 106 107 ERRORI3 30 33 34 204 205 208 209 225 229 230 269 270 EXC76 77 79 81 83 85 87 89 90 98 99 104 106 108 110 112 EXECUTE L2 13 18 20 21 187 226 246 247 248 249 251 253 277 282 284 EXPLICIT ORTHOGONAL 37 F F C76 77 79 80 81 83 84 86 87 88 90 92 99 100 106 107 108 110 111 114 115 C079 81 83 84 86 88 90 99 106 108 110 111 F T76 77 79 80 83 86 87 90 91 99 100 106 107 110 114 115 125 FACTOR29 30 33 34 51 53 76 78 79 82 83 85 87 89 90 98 99 101 105 106 109 ATENA Input File Format 110 113 114 118 143 144 145 151 152 155 156 157 269 FATIGUE BASE STRESS 106 FATIGUE COD LOAD COEFF 43 44 FATIGUE CYCLES oa eo Eos 43 44 FATIGUE CYCLES TO FAILURE 106 FATIGUE MAX FRACT 43 106 FATIGUE MAX FRACT STRAIN MULT 43 44 FATIGUE PARAMS e 25 26 43 FATIGUE CTA Sexi mle ci 43 FC76 77 79 80 81 83 84 86 87 88 90 92 94 99 100 103 106 107 108 110 111 113 114 115 117 136 138 079 81 83 84 86 88 90 99 106 108 110 111 113 114 FCYL28142 143 144 145 146 147 148 149 150
41. BEAM i iter tineis 75 BETA27 28 76 78 79 81 83 85 87 89 90 99 106 108 121 123 207 222 42 2 00 4221 106 109 BODY A 173 179 180 271 272 C C 92 100 E 53 54 53 54 B EUR 53 54 CO ee E T 53 54 p y e ALL 53 54 ay MT 53 54 C1 54 114 116 117 129 133 135 140 142 54 114 116 117 129 133 135 135 CASE174 187 188 189 190 214 215 217 218 219 224 226 228 277 278 282 283 284 14 CCModelB372 73 142 143 144 146 149 151 152 153 154 155 156 157 CCSTRUCTURES 14 286 CCSTRUCTURES 14 COEFF41 61 62 70 71 178 179 180 206 207 235 236 267 268 271 272 COEFFICIENT27 28 50 51 52 53 126 207 208 209 217 COHESION ttr tonne 125 COMBINED reete 72 74 158 COMPLEX 173 174 176 186 215 277 COMPLIANCE143 144 146 148 149 151 152 155 195 CONCRETE142 143 144 146 147 149 151 152 154 155 156 255 257 281 CONSISTENTLY LINEARISED 37 CONSTANT tnn 39 40 50 51 52 COORDINATESAS 69 70 197 200 203 211 222 244 2774 2775 280 COPY 174 CREEP MATERIAL 11 72 73 142 203 CRISEIEED 34 CSOET u
42. HUMIDITY humid TEMPERATURE temper Table 87 amp CCModelB3lmproved sub command parameters Parameter Description CONCRETE Type of concrete Only type 1 and 3 are supported CONECTE ITE Default value 1 THICKNESS thick Ratio volume m surface area m of cross section For long elements it is approximately cross sectional area m perimeter m Default value 0 0767 m 28 days This value is crucial for the creep model s prediction i e prediction of material compliance 7 1 and cylindrical compression strength f f shrinkage etc The ratio of f f 28 days i 4 Note that material FCYL28 f Cylindrical material strength in compression f may be used for overiding short f cy compliance rigidity is overwritten always Default value 35100 kPa FCYLO 28 The parameter 28 days If specified it is used to calculate fj t and overide the corresponding value in the base material Othewise the value in the base material remains unchanged Default value 0 MPa ATENA Input File Format 145 GF28 The parameter fracture energy 28 If specified it is used to calculate G t and overide the corresponding value in the base material Othewise the value in the base material remains unchanged Default value 0 MPa FT28 f The parameter tensile strength f 28days If specified it is used to calculate f t and overide the corr
43. Load No TYPE DYNAMIC name Load No TYPE DYNAMIC name Load No TYPE DYNAMIC name Load No TYPE DYNAMIC name Load No INCREMENT 2 0 1080960265E 2 8 AT 07 9 AT 0 8 10 AT 0 9 11 AT 1 0 12 AT 1 1 13 AT 1 2 14 AT 1 3 15 AT 1 4 16 AT 1 5 17 AT 1 6 18 AT 1 7 19 AT 1 8 20 AT 1 9 21 AT 2 0 22 AT 2 1 23 AT 2 2 24 AT 2 3 25 AT 2 4 26 AT 2 5 27 AT 2 6 LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE LOAD CASE FIXED FIXED FIXED FIXED FIXED FIXED FIXED FIXED FIXED FIXED FIXED FIXED FIXED FIXED FIXED FIXED FIXED FIXED FIXED FIXED 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 ATENA Input File Format STEP id 28 TYPE DYNAMIC name Load No INCREMENT 2 0 1049266428E 2 STEP id 29 TYPE DYNAMIC name Load No INCREMENT 2 0 10 STEP id 30 TYPE DYNAMIC name Load No INCREMENT 2 0 93 STEP id 31 TYPE DYNAMIC name Load No INCREMENT 2 0 85 STEP id 32 TYPE DYNAMIC name Load No INCREMENT 2 0 76 STEP id 33 TYPE DYNAMIC name Load No INCREMENT 2 0 66 STEP id 34 TYPE DYNAMIC name Load No INCR
44. MU x RHO x ALPHA YK x F_YVK x GAMMA Mx F YDx F YVDx E YD HARD x EPS YD MAX x DAMPING MASS xyDAMPING STIFF xx 172 Table 103 amp BEAM_REINF_BAR_MATERIAL sub command parameters Parameter Description Ex Young modulus Units stresses Default value 0 Poisson ratio Units none Default value 0 DAMPING MASS x Mass and stiffness damping factors specified for indiviual DAMPING STIFF xx element group They overwrite the same factor set for the whole 7 structure by SET command RHO x Material density Units mass volume Default value 0 ALPHA_TOL x Angle difference for resultatnt moment load thas is assumed negligible Units none Default value 360 F Characteristic material compressive strength negative This input is not used if the corresponding design value is given Units stresses Default value 0 YVK x Characteristic material shear strength positive This input is not used if the corresponding design value is given Units stresses Default value 0 GAMMA Mx Partial factor of safety Units none Default value 1 F YDx Material strength positive Units stresses Default value 0 F YVDx Material shear strength positive Units stresses Default value 0 ATENA Input File Format 173 E YD HARD Hardening young modul Units stresses Default value 0 EPS YD MAXx Max reinforcement tensile strain Units none Default value 0 01 4 4
45. PASTERNAK COEFFICIENT C 2 Xx PASTERNAK COEFFICIENT C 2 Y x PASTERNAK COEFFICIENT C 2 Z x LOCAL Z AXIS DIR Xx DIR Y x DIR Zx SIZE LOCAL Y WIDTH x SIZE LOCAL Z HEIGHT x KIRCHHOFF MINDLIN TIMOSHENKO TIMOSHENKO CSF REDUCE TM STIFF REDUCE MT STIFF RO Nx EFF WIDTH FACTOR x EFF HEIGHT FACTOR UPDATE BEAM DIR MAX NUMBER OF ITERATIONS FOR REDUCE FORCES n MAX ERROR FOR REDUCE FORCES x S MIN s min S MAX s max MIN t min T MAX t max BARS NUMBER n MATERIAL n BAR AREA x BAR LOCAL Y x BAR LOCAL Z Table 46 SPEC sub command parameters Parameter Description AREA Cross sectional area of a beam object Default 1 0 E g AREA x INERTIA Y Cross sectional inertia moment of a beam object with respect to local Y axis E g INERTIA Y x 54 INERTIA Z Cross sectional inertia moment of a beam object with respect to local Z axis E g INERTIA Z x POLAR Cross sectional polar moment of a beam object with respect to local X axis TORGUE Cross sectional moment of a beam object in torque E g TORGUE x SHEAR Y Cross sectional shear moment of a beam object with respect to local Y axis E g SHEAR Y x SHEAR Z Cross sectional shear moment of a beam object with respect to local Y axis E g SHEAR Z x Winkler or C Pasternak coefficient with respect to local X X coordinate of a vector defining Z axis of beam tru
46. Recommended value From table below MU POISSON NY x Poisson s ratio v Units none Acceptable range lt 0 0 5 Recommended value From table below FT RT F_T R_T x Tensile strength Units MPa Acceptable range 0 maximal real number gt Recommended value From table below FC RC F_C R_C x Compressive strength f Units MPa Acceptable range lt minimal real number 0 ATENA Input File Format Tensile properties GF x CRACK SPACING x TENSION STIFFENING x Compressive properties EPS VP x CO RCO R X LOC COMP 111 Default value 30 Specific fracture energy Gr Units MN m Acceptable range 0 maximal real number Recommended value From table below Crack spacing average distance between cracks after localization If zero crack spacing is assumed to be equal to finite element size Units 1 Acceptable range lt 0 maximal real number gt Default value 0 2 Tension stiffening parameter Units none Acceptable range lt 0 1 gt Default value 0 4 Plastic volumetric strain at maximum compressive p strength 7 Units none Acceptable range minimal real number 0 gt Recommended value From table below Generation formula FC E 1 2 MU Onset of non linear behavior in compression feo Units MPa Acceptable range minimal real number FT 2 Recommended value From table below Slope of softening curve t Units none
47. SECANT PREDICTOR Table 15 amp PREDICTOR sub command parameters Parameter Description ELASTIC PREDICTOR Elastic stiffness matrix shall be used to predict displacement increments from structural unbalanced forces There are no additional parameters for this command This is option is 36 Pp set by default TANGENTIAL PREDICTOR Tangential stiffness matrix shall be used to predict displacement increments from structural unbalanced forces There are no additional parameters for this command By default elastic stiffness matrix is used SECANT PREDICTOR Secant stiffness matrix shall be used to predict displacement increments from structural unbalanced forces There are no additional parameters for this command By default elastic stiffness matrix is used amp UPDATE DISPLS STRATEGY UPDATE IP EACH STEP UPDATE IP EACH ITERATION Table 16 amp UPDATE DISPLS STRATEGY sub command parameters Parameter Description UPDATE IP EACH STEP Specify that material points i e integration points should be updated at the end of each converged step i e load increment It means that stress increments are calculated with respect to the beginning of step rather then previous iteration It ensures stress increments to be calculated always from converged conditions however as stress increments do not converged to zero within current step this approach is more demanding on evaluation of constitutive equations
48. TENSION SOFT HARD FUNCTION n CHAR SIZE TENSION X LOC TENSION x CRACK SPACING x TENSION STIFF x COMP SOFT HARD FUNCTION x CHAR SIZE COMPx X LOC COMP TENSILE STRENGTH RED FUNCTION n EXC x BETA RHO x ALPHA x FT MULTIP x SHEAR FACTOR x UNLOADING x IDEALISATION 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D DAMPING MASS xy DAMPING STIFF xx 100 This material is similar to the previous material 3DNONLINCEMENTITIOUS2USER but it includes features specific for modeling strain hardening cementitious composites or ultra high performance fiber reinforced cementitious composite materials SHCC UHPFRCC The parameters for this material model can be generated based on compressive cube strength of concrete see Table 65 This value should be specified in MPa and then transformed to cu the current units See ATENA theory manual for more detailed explanation of this material Table 69 Parameters for MATERIAL TYPE CC3DNonLinCementitious2SHCC Suitable for strain hardening cementitious composites or fiber reinforced cementitious composites Parameter Description Basic properties E Elastic modulus Format E x Units 17 Acceptable range 0 maximal real number Default value 27 x 10 MU POISSON Poisson s ratio Format MU x Units none Acceptable range lt 0 0 5 Default value 0 2 FT RT F_T R_T Tensile strength Format FT x Units 17 Acceptable range
49. TYPE CCPlaneStressElastIsotropic E 210000 mu 0 2 rho 0 0023 alpha 1 2e 5 dummy object for deletion checking Geometry definition GEOMETRY ID 81 Name Steel thickness TYPE 2D thickness 0 1 GEOMETRY ID 80 Name Steel thickness TYPE 2D thickness 0 1 dummy object for deletion checking Element type definition Should be referred from ELEMENT GROUP definition ELEMENT TYPE ID 92 NAME Stupid 2D Triangle 41 TYPE CCIsoTriangle lt xxx gt ELEMENT TYPE ID 91 NAME Stupid 2D Quad 1 TYPE CCIsoQuad lt xxxx gt ELEMENT TYPE ID 90 NAME Stupid 2D Quad 1 TYPE CCIsoQuad xxxx dummy object for deletion checking Element group definition ELEMENT GROUP ID 500 TYPE 90 NODES 4 MATERIAL 70 GEOMETRY 80 ELEMENT INCIDENCES dummy object for deletion checking 10 100 200 300 400 ELEMENT GROUP ID 2000 TYPE 92 NODES 3 MATERIAL 71 GEOMETRY 81 ELEMENT INCIDENCES 20 500 700 800 10 500 600 700 15 100 200 300 dummy object for deletion checking ELEMENT GROUP ID 1000 TYPE 91 NODES 4 MATERIAL 71 GEOMETRY 81 ELEMENT INCIDENCES 10 100 200 300 400 Load function definition FUNCTION ID 20 NAME Load function TYPE CCMultiLinearFunction XVALUES 0 2 YVALUES 0 FUNCTION ID 10 NAME Load function TYPE CCMultiLinearFunction XVALUES 0 1 YVALUES
50. The DATA and CMDS options are used to export import ATENA Input File Format 193 actual output data monitor output command requests SUPLEMENT Force Atena to automatically add the output data history into the FROM n both monitors regardless of MONITOR 1 MONITOR 2 option ARCHIVES For each of the specified archive files it restores that file i e filename 1 state executes current output monitor requests and exports all filename 2 results After that it restores back the current state and imports all filename the exported data thereby adding output data history i e PRESERVE OUTP monitors from the specified archives This command is useful if at UT OPTIONS alater time it is needed to add some monitored data from previous times 1 e from previous archives PRESERVE OUTPUT OPTIONS causes to use for the supplemented monitor data current settings of the output data conditions such as recovery type etc rather then the settings which were in use during the original execution REMOVE Removes output set set from monitor output requests FILE file name Subsequent output will be redirected into file file The file is open with new and overwrite attributes RECORD Maximum length of output record Default value 120 LENGTH x amp LOCATION Specification of location type where the data should be output If no location is specified the whole model is assumed
51. amp command parameters Parameter Description ARC LENGTH For the current step use base step length for PREVIOUS STEP LENGTH possible optimization by amp ARC LENGTH OPTIMISATION from the previous step In case of the 1 step it acts according to ARC LENGTH RESET STEP LENGTH LENGTH RESET STEP LENGTH For the current step reset base step length The actual step length is step length resulting from applied load in the 1 iteration of the current step for AX 1 It is always calculated for the 1 step 1 iteration STEP LENGTH x Set directly required step length to x By default it is initiated based on load increment see ARC LENGTH RESET STEP LENGTH STEP LENGTH ONCE x Same as the above but it is appkued only once REL STEP LENGTH Allows direct setting of AX in the next step REL STEP LENGTH ONCE relative to previous or reference step length REL REF STEP LENGTH x It can be set only ONCE i e only in the REL REF STEP LENGTH ONCE x next subsequent step or in all subsequent steps until a new relevant input If x 1 this input is ignored By default all these input valus are set to 1 i e they are ignored MIN STEP LENGTH Set minimum and or maximum value step MAX STEP LENGTH x length If the x value is negative this check is ignored By default x 1 This input can overwrite DLAMBDA MIN DLAMBDA MAX MIN REL STEP LENGTH Set minimum and or maximum value of MAX REL STEP LENGTH x current
52. analyses amp 3DCEMENTITIOUS Material suitable for rock or concrete like materials amp 3DNONLINCEMENTITIOUS Materials suitable for rock or concrete like materials Enhanced amp 3DCEMENTITIOUS material amp 3DNONLINCEMENTITIOUS2 Materials suitable for rock or concrete like materials This material is identical to 3DNONLINCEMENTITIOUS except that this model is fully incremental ATENA Input File Format 73 amp 3DNONLINCEMENTITIOUS2VARI Materials suitable for rock or concrete like ABLE materials This material is identical to 3DNONLINCEMENTITIOUS2 except that selected material parameters can be defined using a time or load step function amp 3DNONLINCEMENTITIOUS2USE Materials suitable for rock or concrete like R materials This material is identical to 3DNONLINCEMENTITIOUS2 except that selected material laws can be defined by user curves amp 3DNONLINCEMENTITIOUS2SHC Strain Hardening Cementitious Composite C material Material suitable for fibre reinforced concrete such as SHCC and HPFRCC materials amp 3DNONLINCEMENTITIOUS2FATI Based on the 3DNONLINCEMENTITIOUS2 GUE material suitable for fatigue analysis of rock or concrete like materials amp 3DNONLINCEMENTITIOUS3 Materials suitable for rock or concrete like materials This material is an advanced version of 3DNONLINCEMENTITIOUS2 material that can handle the increased deformation capacity of concrete under triaxial compression Suitable for problems
53. extend int output width extend real output width catch fp instructs demo mode silent batch execute execute rtf inbuf_size i outbuf_size num_threads n num iters per_thread m num unused threads m ATENAStudio D path M module O input file extend int output width extend real output width catch fp instructs demo mode execute threads n 8 AtenaConsole front end is aimed for batch analyses Hence it works only with input and output files produces no graphics and does not need any user interaction On the other hand AtenaWin is a windows based application On start it creates an editable window for each of ATENA s window The user can use these windows to edit content of the files inspect ATENA output during the analysis etc Of course similar windows can be used for editing any other text file It also provides graphical windows post processing and windows for 2D plots which are useful for example for assessing load displacement diagram of analyzed structure Note that all windows in AtenaWin are updated already during the analysis In the above the following notation was used D path specifies path to the working directory where input and output files will be stored P this option forces the program to request manual specification of input and output files M module name name of main DLL library used for execution By default it is assumed C
54. i e count 1 Example MACRO ELEMENT 1002 GENERATE TYPE CCExtrudeElementSelection THROUGH NODE 110 ATENA Input File Format 251 GROUP 2 NAME MB 3 ELEMPROP Block 3 SOURCE NODE 107 SOURCE ELEMPROP Block 2 SOURCE NODEPROP Block 2 N2N3N6N7 SOURCE GROUP 1 ACCOMPLISH 3 TIMES EXECUTE 4 10 4 5 CCDiscreteReinforcementME MACRO ELEM DATA SPEC data This macroelement is used to generate discrete reinforcement bars The element supersedes the legacy command REINFORCEMENT BAR The THROUGH NODES mnode id data from the MACRO ELEMENT command defines macro nodes thru which the reinforcement bar should pas the mnode 1 and mnode n being the first and the last macro node of the bar Syntax MINIMUM SIZE x EMBEDDED IN SOLID SOLIDS AT FROM solid group id 1 TO solid group id 2 NORMAL TINY SIZE PROCESS FLAG USE REFERENCE COORDS USE CURRENT COORDS COPY DEFORMATION COPY DEFORMATION ONCE COPY NO DEFORMATION REPEAT DX dxl dx2 dx3 DY dxl dy2 dy3 DZ dzl dz2 dz3 RESET EMBEDDED RECONNECT NODES Table 160 MACRO ELEM DATA SPEC for CCReinforcementME MACRO ELEM DATA SPEC element parameters Parameter Description EMBEDDED IN Interval of element groups defining the master material i e SOLID SOLIDS AT solids ids where the bar should be generated In other words FROM solid group id 1 the bar will be embedded in the specified material
55. none Acceptable range 0 maximal real number gt Default value 0 12 Generation formula Drucker Prager parameter k Units 17 Acceptable range lt minimal real number 0 Default value 0 0 f f Generation formula K oe inea ALPHA E Self Gneo O O OOOO OOO OOOO l properties WD x Critical compressive displacement Units 1 Acceptable range lt 0 maximal real number gt Default value 0 0005 fi Miscellaneous properties ATENA Input File Format 123 BETA x Multiplier for the direction of the plastic flow Units none Acceptable range lt minimal real number maximal real number gt Recommended range 2 2 Default value 0 0 RHO x Material density Units M P Acceptable range lt 0 maximal real number gt Default value 0 0023 f f ALPHA x Coefficient of thermal expansion Units 1 T Acceptable range lt 0 maximal real number gt Default value 0 000012 DAMPING MASS x Mass and stiffness damping factors specified for indiviual DAMPING STIFF xx element group They overwrite the same factor set for the whole structure by SET command IDEALISATION Defines the idealisation if material model with higher dimension is to be used in a finite element with lower dimension For instance in case a 3D model is to be used in 2D configuration Units none Acceptable range 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D Default value program tries to determine a suitable idealisation based on the di
56. 0 maximal real number gt Default value 4 f f FC RC F_C R_C Compressive strength Format FC x Units 17 Acceptable range lt minimal real number 0 Default value 16 f f Fiber reinforcement FIBER VOLUME FRA Volume fraction of the fibers Format FIBER VOLUME FRACTION x Units none Acceptable range lt 0 1 gt ATENA Input File Format 101 Defuult value 0 02 FIBER_E MODULUS FIBER SHEAR MODU LUS FIBER CROSS SECTI ON FACTOR FIBER DIAMETER Young s modulus of an individual fiber Format FIBER E MODULUS x Units 17 Acceptable range 0 maximal real number Default value 30 x 10 f f Shear modulus of an individual fiber Format FIBER SHEAR MODULUS x Units 17 Acceptable range 0 maximal real number Default value 0 15 x 10 f f Fiber cross section shape correction factor Format FIBER CROSS SECTION FACTOR x Units none Acceptable range 0 maximal real number Default value 0 9 Fiber diameter Format FIBER DIAMETER x Units none Acceptable range 0 maximal real number Default value 0 00004 f Tensile properties TENSION SOFT HARD FUNCTION Index of the function defining the tensile hardening softening law The horizontal axis represents strains and vertical axis tensile strength which should be normalized with respect to f Format TENSION SOFT HARD FUNCTION Units none Acceptable range 1 maximal int number Default
57. 0 maximal real number Default function values X 0 0 0 0001 Y 1 0 0 0 Format TENSION SOFT HARD FUNCTION 7 Units none Acceptable range 1 maximal integer Default value none see command FUNCTION Function which defines uniaxial relative stress displacement relationship Relationship should be defined as a set of points starting from 0 0 and only positive values should be specified X coordinates of this function mean shear displacement units 1 range lt 0 maximal real number Y coordinates represent the relative tensile strength with respect to COHESION units NONE range lt 0 maximal real number Default function values X 0 0 0 0001 Y 1 0 0 0 Format COHESION SOFT HARD FUNCTION n Units none Acceptable range 1 maximal integer gt Default value none see command FUNCTION ATENA Input File Format 127 K NN MINx Minimal normal stiffness for numerical purposes Units mM Acceptable range 0 maximal real number Default value K NN 1000 K TT MIN x Minimal tangential stiffness for numerical purposes Units m Acceptable range 0 maximal real number Default value K TT 1000 RESET DISPLS n For gt 0 this flag forces realignment of the bottom slave interface surface lines of the gap element with respect to its top master surface line i e the top surface line is glued to the surrounding structure whilst the bottom surface line is slipping This happens at the e
58. 1 Load case 60 definition ATENA Input File Format 277 LOAD CASE ID 60 NAME Supports dummy object for deletion checking SUPPORT SIMPLE node 100 dof 1 value 0 0 node 100 dof 2 value 0 0 400 dof 1 value 0 0 Load case 61 definition LOAD CASE ID 61 NAME Supports SUPPORT SIMPLE node 100 dof 1 value 0 0 node 100 dof 2 value 0 0 node 400 dof 1 value 0 0 Load case 63 definition LOAD CASE ID 63 NAME Loads SUPPORT SIMPLE node 600 dof 1 VALUE 3 33e 6 FUNCTION 20 SUPPORT SIMPLE node 700 dof 1 value 3 33e 6 FUNCTION 20 Load case 62 constraints LOAD CASE ID 62 NAME Constraints SUPPORT COMPLEX MASTER node 200 dof 1 1 0 SLAVE node 500 dof 1 value 0 0 MASTER node 200 dof 2 1 0 SLAVE node 500 dof 2 value 0 0 MASTER node 300 dof 1 1 0 SLAVE node 800 dof 1 value 0 0 MASTER node 300 dof 2 1 0 SLAVE node 800 dof 2 value 0 0 SUPPORT MASTER SLAVE NODAL PAIRS 5 2 8 3 Set analysis options switches SET Static SET Newton Raphson SET Displacement error 0 01 SET Residual error 0 01 SET Absolute residual error 0 1 SET Iteration limit 20 Testing of deletion DELETE ELEMENT GROUP 500 DELETE JOINT 50 DELETE ELEMENT GROUP 2000 ELEMENT 15 DELETE GEOMETRY 80 DELETE ELEMENT TYPE 90 DELETE MATERIAL 70 DELETE LOAD CASE ID 60
59. 100 TO 150 BY 10 Entity to be added into the selection e g LIST 23 26 100 Insert entities from the selection name selection into the selection destination name Source entities which are already present in the selection destination name are not inserted thus avoiding entities duplication Remove entities defined in the selection name selection from the selection destination name Source entities which are already not present in the selection destination name are skipped Connect the source selection selection name with destination selection destination name This 1s done in the following way Loop from the first to the last entry of the source selection For each such entry loop from the last to the first entry of the destination selection If the current source and destination entries match the is the point where destination name and selection name should be connected keep the current entry in the destination selection and remove all sbsequent entries Append the source selection starting 20 from the 1st entry behind the matching entry up to the end to the destination selection If no match is found the selection are appended with all the entries they originally include Eg Destination selection 2 7 8 3 1 4 source selection 9 3 5 gt yields destination selection 2 7 8 3 5 The source selection remains unchanged DUET This command has sense only for selection containing X X Y Y
60. 134 Table 82 amp MICROPLANE sub command parameters Parameter Basic fairies rf Ex Elastic modulus Units 17 Acceptable range 0 maximal real number gt Default value 30 x 10 f f Generation formula E 6000 15 5R SM fel f this formula is valid only if 1 compressive cube strength given as positive number in MPa MU POISSON NY Poisson s ratio Units none Acceptable range lt 0 0 5 Default value 0 3 NP i Number of microplanes Units None Acceptable values 21 28 37 61 Default value 21 Microplane parameter kp Units None Acceptable range lt 0 maximal real number gt Default value 500 Microplane parameter kz Units None Acceptable range lt 0 maximal real number gt Default value 15 Microplane parameter k4 Kl x Microplane parameter k Units None Acceptable range 0 maximal real number Default value 1 5 x10 Generation formula 20 1156 R E Ka x O ATENA Input File Format 135 NEN Units None Acceptable range 0 maximal real number Default value 150 BAND x Crack band size Units 1 Acceptable range 0 maximal real number Default value 0 003 f Miscellaneous properties RHO x Material density Units M P Acceptable range 0 maximal real number Default value 0 00785 f f ALPHA x Coefficient of thermal expansion Units 1 T Acceptable range lt 0 maximal real number gt Default value 0 000012 IDEALISATION Define
61. 153 154 155 156 211 222 257 265 266 TIME27 28 44 45 46 47 143 144 145 146 148 149 151 152 153 154 155 156 157 179 180 195 204 207 210 216 268 269 271 272 273 280 TIME INTEGRATION 27 28 207 209 268 269 280 PEME MM eat 11 TT IEE 15 196 275 280 TO18 19 22 41 58 59 106 179 180 187 190 192 193 204 217 230 231 251 252 253 270 271 272 284 TORGUE nnb HS 53 54 TOTAL LOAD 174 271 273 TOTAL LOSS erm 143 144 145 dn nth 190 193 194 TRANSIENT27 28 207 208 210 216 217 268 280 TYPEI1 19 25 27 29 35 36 37 49 60 61 62 70 71 72 75 76 79 83 86 90 91 99 100 106 110 114 119 121 123 125 127 128 130 131 132 133 136 139 140 142 158 159 160 162 163 167 171 174 176 187 188 189 190 202 206 207 208 211 214 217 218 219 221 222 224 226 228 235 246 248 249 250 252 253 255 256 257 267 268 271 276 277 279 281 282 U ATENA Input File Format UPDATE IP EACH ITERATION 36 UPDATE IP EACH 36 V VALUEII 70 174 175 176 178 179 180 185 237 271 272 274 277 283 284 VARIABLE39 40 72 74 118 159 160 162 163 167 171 e eerte eot ert et rae 194 WATER143 144 145 151 152 153 155 156 157 195 WC140 141 142 143 144
62. 154 155 156 157 158 204 205 ID46 48 49 61 62 70 71 72 174 179 180 185 187 188 189 190 196 206 211 214 222 224 226 228 235 244 246 247 248 252 253 254 255 256 258 267 276 277 281 282 283 284 25 26 46 49 56 57 58 59 195 IMPORTII 13 14 179 180 189 190 192 204 270 271 INCIDENCES60 68 69 197 202 203 213 214 224 271 276 282 INCREMENENTAL LOAD 271 273 INCREMENT27 28 70 71 188 189 207 210 216 217 218 219 268 280 INCREMENTAL LOAD 174 INERTIA Y 53 INERTIA nsn cse 53 54 INITIAL61 62 173 179 180 205 206 235 236 267 INPUT ii aiit ete te teens 13 229 INTERFACE 72 73 123 124 125 INTERNAL 190 193 200 217 277 282 284 INTERVALS rtt etre oes 204 IP 11 18 21 36 180 190 194 197 271 273 IPS iue 11 18 21 58 59 60 190 193 197 LEM ertet ot 190 193 217 ITERATION29 33 35 36 41 42 190 191 194 288 J 18 21 48 69 70 211 222 228 237 240 241 244 245 246 247 249 250 251 253 275 277 280 K K 46 47 121 122 125 127 132 133 136 139 140 158 159 160 162 163 199 204 228 255 256 258 270 278 280 281 119 120 133 134 136 137 KZer 119 121 133 134 136 137 Ko Ee tn EE 133 134 136 137 Kd tae coule et
63. 218 STEP id 8 TYPE DYNAMIC name Load No STEP id 9 STEP id 10 STEP id 11 STEP id 12 STEP id 13 STEP id 14 INCREMENT 2 0 1 STEP id 15 INCREMENT 2 0 2 STEP id 16 INCREMENT 2 0 3 STEP id 17 INCREMENT 2 0 5 STEP id 18 INCREMENT 2 0 6 STEP id 19 INCREMENT 2 0 7 STEP id 20 INCREMENT 2 0 8 STEP id 21 INCREMENT 2 0 9 STEP id 22 INCREMENT 2 0 9 STEP id 23 INCREMENT 2 0 1 STEP id 24 INCREMENT 2 0 1 STEP id 25 INCREMENT 2 0 1 STEP id 26 INCREMENT 2 0 1 STEP id 27 2 6 9 1 3 4 3 1 8 0 0 0 0 INCREMENT 2 0 649175706E 3 TYPE DYNAMIC name Load No INCREMENT 2 0 533870226E 3 TYPE DYNAMIC name Load No INCREMENT 2 0 410233878E 3 TYPE DYNAMIC name Load No INCREMENT 2 0 280195968E 3 TYPE DYNAMIC name Load No INCREMENT 2 0 145785694E 3 TYPE DYNAMIC name Load No INCREMENT 2 0 9100483E 5 TYPE DYNAMIC name 7726738E 3 TYPE DYNAMIC name 2560826E 3 TYPE DYNAMIC name 3297741E 3 TYPE DYNAMIC name 78973 75E 3 TYPE DYNAMIC name 4415394E 3 TYPE DYNAMIC name 1033573E 3 TYPE DYNAMIC name 6088172E 3 TYPE DYNAMIC name 8095893E 3 TYPE DYNAMIC name 5777035E 3 38075457E 2 74175059E 2 93512517E 2 95786078E 2 Load No Load No Load No Load No Load No Load No Load No Load No Load No TYPE DYNAMIC name
64. 5 9 Results Load step i Nodes Sbeta State Variables for details PERFORMANCE INDEX Index for material performance characteristics DISPLACEMENTS Current minus reference nodal coordinates 1 e nodal displacements PARTIAL INTERNAL FORC Internal forces at nodes ES PARTIAL EXTERNAL FORC Applied nodal forces i e loading ES PARTIAL REACTIONS Global reactions PARTIAL RESIDUAL FORC Applied nodal forces minus internal forces ES INTERNAL FORCES Internal forces at nodes compacted EXTERNAL FORCES Applied nodal forces 1 e loading compacted REACTIONS Global reactions compacted ATENA Input File Format RESIDUAL FORCES 201 Applied nodal forces minus internal forces compacted EPS MI Value of internal creep variables BOND STRESS Bond stress between reinforcement and concrete CABLE FORCE Forces in external cables FRACTURE STRAIN Fracturing strains PLASTIC STRAIN Plastic strains TENSILE STRENGTH Current values of tensile strength MAXIMAL FRACT STRAIN Maximal value of fracture strain reached during the analysis for each material direction PERFORMANCE INDEX Relative stress error in the evaluation of the material model YIELD CRUSH INFO Yielding crushing status information SOFT HARD PARAMETER Softening hardening parameter EQ PLASTIC STRAIN Equivalent plastic strain The calculation method depend
65. 9500000 2 9500000 2 9500000 2 9500000 2 9500000 2 9500000 2 9500000 2 9750000 2 9750000 2 9750000 2 9750000 3 0000000 3 0000000 3 0000000 3 0000000 3 0000000 3 0000000 3 0000000 3 0000000 1 0000000 0 00e 000 1 0000000 0 00e 000 0 5000000 1 0000000 0 00e 000 1 0000000 0 00e 000 0 5000000 1 0000000 0 00e 000 1 0000000 0 00e 000 1 0000000 0 00e 000 0 5000000 1 0000000 0 00e 000 1 0000000 0 00e 000 0 5000000 1 0000000 ELEMENT GROUP id 1 name Spring type I material 1 geometry 1 ELEMENT INCIDENCES 1 0000000 0 00e 000 0 00e 000 1 0000000 1 0000000 1 0000000 0 5000000 0 5000000 0 00e 000 0 00e 000 0 00e 000 1 0000000 1 0000000 0 00e 000 0 00e 000 1 0000000 1 0000000 1 0000000 0 5000000 0 5000000 0 00e 000 0 00e 000 0 00e 000 213 214 1 1 13 15 3 6 18 20 8 9 14 10 2 1L 19 12 7 4 16 17 2 13 25 27 15 18 30 32 20 21 26 22 14 23 31 24 19 16 28 29 17 3 25 37 39 27 30 42 44 32 33 38 34 26 35 43 36 31 28 40 41 29 ELEMENT GROUP id 2 name Mass type 1 material 2 geometry 1 ELEMENT INCIDENCES 1 37 49 51 39 42 54 56 44 45 50 46 38 47 55 48 43 40 52 53 41 ELEMENT TYPE ID 1 PREPARE CALCULATION Load case No 1 LOAD CASE id 1 name Permanent supports Joint support SUPPORT SIMPLE node SUPPORT SIMPLE node SUPPORT SIMPLE node dof 1 value 0 0 dof 2 value 0 0 dof 3 value 0 0 ON SUPPORT SIMPLE node 4 dof 1 value 0 0
66. ANALYSIS PARAMS and amp CREEP STEP DEFINITION sub commands 4 7 1 Command amp RETARDATION The command is used to define retardation times for approximation of material creep compliance function by Dirichlet series Coefficients of the approximation are set either by the Least Square Method the case of using DISCRETE SPECTRUM keywords or by Inverse Laplace Transformation i e the case of CONTINUOUS SPECTRUM By 204 continuous is meant ATENA will use continuous rather then discrete retardation spectrum By default discrete approach is preferred The 3 derivation of the compliance function is employed to compute the Inverse Laplace Transformation The retardation times will be generated from fime start to time end both inclusive so that there will be ndecl_retard points evenly distributed at logio time span The exact meaning of these parameters slightly differs for the case of discrete and continuous approach It is explained in more details in the ATENA theoretical manual By default it is generated one retardation time per logio days Note that it is not possible to carry on the analysis beyond time end and it is not possible re generate the retardation times later in the analysis because it would result in serious inaccuracy of compliance function approximation Syntax amp RETARDATION TIMES RETARDATION TIMES FOR EXECUTION DISCRETE CONTINUOUS SPECTRUM TIME S FROM time_start TO time end RETARD TIM
67. CCCombinedMaterial Ixixixix xj Table 55 Element Type and Material Compatibility beam and shell elements CCIsoShell Wedge CCIsoShellQuad CCIsoShellTriangle CCIsoBeamBrick CCBeamNL CCIsoShellBrick 3 as E 3 o aa o Rz o o CC1DElastlsotropic x x x x x x x ATENA Input File Format 67 corinesuesstastsorpic p p sf p p p p CC3DElastlsotropic CCASymElastIsotropic 22 o po p o Jccspcemeniins JccspNonLinCementiow2User JCcspNonLinCementtiow2Varable IcSmemmer ES cccmumtmmiSmenmen e e o o Po o cea 0 o o j j L Icspmkebwemesiy x x x x x x x x cwweawiwvaiemopeses x x x x x x x x JccmateiaWithfempDepPropenies x x x x x x x Jcomateriawititandomries x x x x x x x x x x x x x x x x x j j L x j fb bj d d Table 56 Beam and shell elements and their element idealisation material idealisation and geometry type CCIsoShell Wedge CCIsoShellQuad CCIsoShellTriangle 5 P 5 m E amp z a S E E o S El 5 ea o ao o m mM n o o E E E E E 9 o For reinforcement 68 Element geometry type M 3D LAYEREDSHELL LAYEREDSHELL LAYE
68. CCModelBaXi194 CONCRETE CONCRETE TYPE 1 RATIO_WC 0 5 CEMENT WEIGHT 0 27 TEMPERATURE K TEMP TEMP 103680 C TEMP TEMP 0 000008 initial values for psi NODE 1 MATERIAL TYPE 1 TEMP 20 NODE MATERIAL TYPE 1 TEMP 20 NODE MATERIAL TYPE 1 1 TEMP 25 NODE MATERIAL TYPE 1 1 TEMP 25 NODE MATERIAL TYPE 1 H1 TEMP 30 NODE MATERIAL TYPE 1 TEMP 30 NODE MATERIAL TYPE 1 1 TEMP 35 NODE MATERIAL TYPE 1 1 TEMP 35 NODE 9 MATERIAL TYPE 1 TEMP 40 NODE 10 MATERIAL TYPE 1 H 1 TEMP 40 oN A t BW N NODAL SETTING temperature gradient dT dy 20 281 282 Geometry definition GEOMETRY ID 1 Name Concrete column TYPE 2D thickness 10 Element type definition Should be referred from ELEMENT GROUP definition ELEMENT TYPE ID 1 NAME 2D Iso quadratic TYPE IsoQuad lt xxxx gt Element group definition ELEMENT GROUP ID 1 TYPE 1 MATERIAL 1 GEOMETRY 1 ELEMENT INCIDENCES 1 1 2 4 3 2 3 4 6 5 3 5 6 8 7 4 7 8 10 9 SELECTION all list 123456789 10 SELECTION all3 8 list 34 56 7 8 intermediate nodes SELECTION all9 10 list 9 10 top surface SELECTION all1 2 list 1 2 bottom surface Steady state boundary conditions LOAD CASE ID 1 NAME LC I1 for fixed nodes dT dx 20 from initial conditions and equivalent external load SUPPORT SIMPLE SELECTION all dof 1 const 0 fix h SUPPORT SIMPLE SELECTION all3 8 dof 2 const 0 fix T LOAD SIMPLE SELECTION 119 10
69. ELEMENT TYPES MATERIALS GEOMETRIES OUTPUT DATA amp LOCATION LIST amp LOCATION LIST GROUP S amp INTERVAL ELEMENT S amp INTERVAL IP S amp INTERVAL 11 GROUP S amp INTERVAL ELEMENT S amp INTERVAL ENODE S amp INTERVAL NODE S amp INTERVAL ID S amp INTERVAL LOC 1 amp INTERVAL LOC 2 amp INTERVAL LOC 3 amp INTERVAL l MULTI SELECTION AT SELECTION multi selection list amp INTERVAL AT n FROM n TO n BY n SELECTION selection list amp DATA DATA ALL ITEM TO n BY n LIST output keyword RECALCULATE AT n FROM ITEM n1 TO n2 BY n3 END Table 123 amp OUTPUT command parameters Parameter Description MONITOR Adds output set set name into monitor output requests Output format is set to produce output data records versus time in which all output data for a particular step or iteration i e for a MONITORS EACH particular time are written into one line The first word of such line ITERATION contains set followed by current step id iteration id and STEP time and then all output items are sequentially printed one after another Use grep set name or similar to extract output lines corresponding to set name output data for their import into a thirty party post processing package like spreadsheets etc The specified output command is processed after completing of ATENA Input File Format PLOT PL
70. ENFORCED DELETE GROUP group id JOINT GENERATE NODES ELEMENT OF GROUPIGROUP FROM group id GROUP TO group to WITHIN BOX MACRO NODES i i2 i3 i4 i5 i6 i7 i8 DISTANCE x FROM POINT MACRO NODES i LINE MACRO NODES i i2 PLANE MACRO NODES i i2 i3 NEAREST MACRO NODES i IP IPS ENODE ENODES GNODE GNODES SOURCE NODE SELECTION sel nodes SOURCE GROUP SELECTION se groups SOURCE_GROUP EXECUTE SORT X X LC 1 31 1221 2011 ATENA Input File Format 19 Table 5 amp SELECTION command parameters Name of the created or modified selection list CLEAR COMBINE SEPARATE dist list2 list3 RENAME FROM AT from_id TO id BY by id LIST id INSERT selection INCLUDE selection EXCLUDE selection CONNECT selection name Clear current content of the list but doesn t remove the selection itself Combines two or three selection lists into one list or split one list into two or three selection lists Used to convert multi selection lists into ordinary selection list and vice versa Rename selection source name to destination name Set interval for entity ids to be generated They are generated for recursive formula id from id id id by_id upto id to By default to id from 14 id l Example LIST AT 1 AT 10 FROM
71. File Format pf efit value 7 POT val QW POT val TH INIT val ALPHA INIT val TH INCR MIN val TH INCR MAX val TEMPERATURE INCR MAX val 261 pa 18 potential hydration heat Units energy kg of cement Default value 500000 J kg of cement 2 is potential hydration moisture consmption Units mass of water mass of cement i e unitless Default value 0 24 kg of water lkg of cement Initial time f ini for which has been calculated Typically it is zero Units time Default value 0 hour Initial value of maturity factor For fresh and hydrated concrete 0 respectively Typically it is zero Units Default value 0 Units At minimum time increment for integration of maturity factor Units time Default value 1 second At Maximum time increment for integration of maturity factor Units time Default value 1 hour Time increment for for integration of maturity factor is calculated as follows At exp 0 03674066933AT log f At lt AL I TEMPERATURE INCR MAX val states for AT parameter in the above equation max Units temperature Default value 0 1 C 262 CEMENT MASS val AGGREGATE MASS val FILLER_MASS val CEMENT DENSITY val WATER_DENSITY val AGGREGATE DENSITY val FILLER_DENSITY val C AGGREGATE TEMP TEMP val C FILLER TEMP TEMP val C CEMENT TEMP TEMP val Cement mass in concrete
72. GROUP group COUNTER BASE ELEMENT BASE NODAL base id NAME melem name ELEMPROP elem prop NODEPROR node prop ID id MACRO ELEM DATA SPEC EXECUTE amp DELETE SPEC ENFORCED DELETE DELETE Table 156 amp MACRO ELEMENT command parameters melem id Unique integer number for the macroelement s identification Note that macroelements ids need not be continuous amp GENERATE SPEC Request to generate update or remove the amp UPDATE amp DELETE SPEC macroelement melem id and input of the corresponding data for generation only Meaning of the keyword ENFORCED is the same in DELETE command Type of macroelement to be used for finite element generation see the table amp MACRO ELEMENT supported types above THROUGH NODES List of ids of macro nodes which defines geometry of mnode id the macroelement Typically these are ids of some important macroelement boundary nodes are defined but it need not be always the case For more information refer to description of a particular macroelement GROUP group id COUNTER Id of a group that comprises the generated finite BASE ELEMENT BASE elements Each macroelement is composed of one or NODAL BASE base id more elements all of them being from the GROUP group id COUNTER BASE ELEMENT BASE NODAL BASE base id allows to set base ids for numbering of generated finite elements and nodes By default base i
73. ID 7 C TEMP TEMP ID 7 C W TEMP ID f C H T TEMP ID 7 D H H FNC T ID fj D TEMP FNC T ID D H W T ID D GRAV C H H FNC T ID f C H TEMP FNC T ID C H W FNC T ID f CH T FNC T ID f Table 162 amp Parameters of the amp CCModelBaXi94 within the transport analysis Parameter Description CONCRETE TYPE n type Type of concrete resp type of cement n type 1 4 n type 1 for Portland cement etc Default value 1 RATIO WC ratio Water cement ratio The allowed range is 0 3 0 7 Default value 0 56 CEMENT WEIGHT This parameter is used to account for moisture loss due to cem weight hydration When the CCModelBaXi94 material model is used cem weight should be set 0 because the model takes hydration into account automatically This option is prepared for some less elaborated material models that cannot deal with hydration moisture loss directly and the Bazant and 258 Thonguthai 1978 Bazant 1986 model should be used instead For more information refer to the ATENA Theoretical Manual section Transport analysis Default value 0 K TEMP H x Coefficients defining heat flux The heat flux is computed K TEMP TEMP x by J ky Vh k VT kp see the ATENA E g Theoretical manual Usually all these coeff
74. LOCATION ATTRIBUTE DATA ALL Some of these output keyword are also explained in the following table For more information about the available output data attributes see also the GUE User Manuals ATENA Engineering 2D 3D ATENA Studio If only some items of output keyword are desired define them by ITEM 7 TO n BY n For example if only stress and oy are needed type ITEM 1 TO 2 The list of output keyword is terminated by keyword END If all output data for a particular location type are requested use keyword ALL instead of LIST output keyword 1 output keyword 2 END structure If RECALCULATE keyword forces to recalculate the requested output data even if they were previously computed and cached Flag for tracing results during iterations By default data e g at element IPs can be traced even during iterations either by OUTPUT MONITOR EACH ITERATION or from ATENA GUI As this extra output service costs not negligible resources mainly RAM the user may find reasonable to switch off this service in case of extensive analyses e g at areas being not critical for structural over all behavior This output is available only for the location ELEMENTS Method for recovering output data akin stress strain etc from IPs to element nodes It can be either VARIATIONAL in which case an energy based is used to do the recovery or a simplified LUMPED method The former one is more accurate and theoretica
75. Load and Boundary Conditions Definition This command defines loads applied in a load case The following main load types are supported Table 104 Load and boundary conditions definition types Sub Command amp LOAD DISPLACEMENT Prescribed nodal displacement i e Dirichlet boundary condition either amp SIMPLE LOAD DISPLACEMENT or amp COMPLEX LOAD DISPLACEMENT amp LOAD FORCES Prescribed nodal forces i e Neumann boundary condition either amp SIMPLE LOAD FORCE Or amp COMPLEX LOAD FORCE amp LOAD MASTER SLAVE Master slave node pairs prescribed displacement as a linear _ NODES combination of other displacements and constant value i e Cauchy boundary condition amp ELEMENT LOAD Element loads either amp BODY ELEMENT LOAD or amp ELEMENT BOUNDARY LOAD Or amp TEMPERATURE ELEMENT LOAD Or amp ELEMENT INITIAL STRAIN LOAD Or amp ELEMENT INITIAL STRESS LOAD or amp LOAD FUNCTION or amp MASS ACCELERATIONS or amp ELEMENT INITIAL GAP LOAD or amp CHLORIDES or amp CARBONATION amp LOAD FUNCTION Time function id i e id of time or step id function defining coefficient for the applied load See amp FUNCTION for the function definition amp SPRING DEFINITION Spring support boundary condition amp RIGID BODY Definition of rigid body and or inverse rigid body constrains amp INVERSE RIGID BODY 4 4 1 1 The Command amp LOAD Syntax 174 amp LOAD LOAD CASE IDn NAME load case name
76. MAXIMUM 42 MESSAGE 13 14 229 230 MICROPLANE e 72 73 133 134 MINIMUM ETC aed de 42 MODIFIED NR 35 MODULUS 99 101 119 120 MOISTURE 143 144 145 151 152 153 MOMENT Au tastes tonc 53 MONITOR 189 190 191 193 194 195 217 MU75 76 77 79 83 86 87 90 91 99 100 106 114 115 119 120 121 122 123 124 134 137 N 14 15 49 61 62 71 72 174 185 187 188 189 192 196 217 226 246 248 249 251 252 253 276 277 281 282 283 284 27 28 45 46 207 217 NEWTON RAPHSON 22 0240422 22222 35 NODALI I3 43 44 45 70 71 176 185 190 200 203 206 207 215 235 246 248 267 268 277 278 279 281 NODEII 12 18 20 22 41 70 71 178 179 180 184 185 190 193 206 207 235 250 251 267 268 279 281 283 284 NODESI1 18 20 21 22 46 173 174 176 178 186 190 193 196 198 200 203 217 240 241 242 243 244 246 247 248 249 ATENA Input File Format 250 251 252 253 271 272 273 274 276 278 282 284 NOMINAL HOC eene 271 42 126 190 192 240 241 242 NONLINEAR eene 61 62 NORMAL UPDATE 37 ANI 133 134 NUMBER39 40 58 59 60 140 204 208 209 225 OFF 25 26 190 193 194 QN sett 25 26 101 173 190 193 1
77. MESSAGE MESSAGE FILE file name Table 146 amp MESSAGE FILE command parameters This command specifies the name of the message file All messages following this command will be redirected to this file E g MESSAGE FILE file 4 9 6 The Command amp ERROR Syntax amp ERROR ERROR FILE file name 230 Table 147 amp ERROR FILE command parameters This command specifies the name of the error file All errors following this command will be redirected to this file E g ERROR FILE file 4 9 7 TheCommand amp RESTORE Syntax amp RESTORE RESTORE FROM file name Table 148 amp RESTORE command parameters This command reads the finite element model state from the given binary file name The content of the finite element model is overwritten by the file contents E g RESTORE FROM file name 4 9 8 The Command amp STORE Syntax amp STORE STORE TO file name EACH n STEP STEPS SUBSTEP SUBSTEPS Table 149 amp STORE command parameters This command writes the finite element model state to a binary file It can write immediately e g STORE TO file name or it can autimatically serialize each n th e g STORE TO file name EACH n STEPS or it can carry out the serialization each step and m th substeps e g STORE TO file name EACH m SUBSTEPS for dynamic and creep analyses only In the case of automatic serialization by steps the filena
78. Miscellaneous Commands 4 91 Command amp FUNCTION 4 9 2 Command amp PRE CRACKY 493 Command amp DELETE 494 Command amp INPUT 4 9 Command amp MESSAGE 496 Command amp ERROR 497 Command amp RESTORE 4 98 Command amp STORE 49 9 Command amp PUSHOVER ANALYSIS 4 9 10 Static initial values of state variables 142 158 159 160 162 163 173 187 187 189 189 203 203 204 205 205 205 207 208 208 208 209 210 220 226 226 228 228 229 229 229 230 230 230 235 ATENA Input File Format 4 10 4 10 1 4 10 2 4 10 3 4 10 4 Preprocessor commands The Command amp T3D SPEC The command T3D EXPAND SELECTIONS The Command amp MACRO JOINT The Command amp MACRO ELEMENT 4 11 Transport Analysis Related Commands 4 11 1 4 11 2 4 11 3 4 11 4 4 11 5 4 11 6 4 11 7 Transport constitutive material model Transport finite elements Transport initial values of state variables Transport Set parameters The amp HISTORY EXPORT command amp Transport element load amp Transport analysis additional output data 5 SAMPLE INPUT FILE 5 1 Input file for a sample static analysis 5 2 Input file for a sample transport analysis 6 ATENAINPUT FILE KEYWORDS 237 237 240 244 245 254 255 265 267 268 270 271 274 275 275 278 285 ATENA Input File Format 7 1 INTRODUCTION AND SCOPE OF THE DOCUMENT The program ATENA is a gener
79. Otherwise the TEMPERATURE indicated order is assumed The units are days degrees Celsius temper and dimension less humidity in interval 0 3 1 amp CCModelBP KX DATA CCModelBP KX CONCRETE concrete type THICKNESS thick FCYL28 fcyl28 E28 e28 HUMIDITY humidity DENSITY density AC ac WC we SHAPE FACTOR sfactor WATER AIR STEAM CURING END OF CURING TIME endcuring LOAD CURRENT TIME time SHRINKAGE COMPLIANCE measured val HISTORY TIME time HUMIDITY humid TEMPERATURE temper Table 90 amp CCModelBP_KX sub command parameters Parameter Description CONCRETE Type of concrete Only type 1 and 3 are supported concrete type Default value 1 THICKNESS thick Ratio volume m surface area n of cross section For long elements it is approximately cross sectional area m perimeter m Default value 0 0767 m FCYL28 fcyl28 Cylindrical material strength in compression kPa Default value 35100 kPa E28 e28 Short term material Young modulus at 28 days i e inverse compliance at 28 01 days loaded at 28 days kPa Default value calculated from fcy 28 HUMIDITY humidity Ambient relative humidity 0 3 1 Default value 0 780 DENSITY density Concrete density kg m 152 D Default value 2125 kg m AC ac Total aggregate cement ratio Default value 7 04 WC wc Water cement ratio Default value 0 63 SHAPE FACTOR Cross section shape fac
80. Preconditioned Conjugate Gradient iterative Ax b solver Routine to solve a symmetric positive definite linear system Ax b using the Preconditioned Conjugate Gradient method Preconditioned CG Sparse Ax b Solver for Normal Equations Routine to solve a general linear system Ax b using the Preconditioned Conjugate Gradient method applied to the normal equations AA y b Solve a Non Symmetric system using Preconditioned BiConjugate Gradient Preconditioned BiConjugate Gradient Sparse Ax b solver Routine to solve a Non Symmetric linear system Ax b using the Preconditioned BiConjugate Gradient method Preconditioned Orthomin Sparse Iterative Ax b Solver Routine to solve a general linear system b using the Preconditioned Orthomin method sgmres Preconditioned GMRES iterative sparse Ax b solver This routine uses the generalized minimum residual GMRES method with preconditioning to solve non symmetric linear systems of the form A x b Table 12 PREPARATION PHASES Phase name Description ssds Diagonal Scaling Preconditioner SLAP Set Up Routine to compute the inverse of the diagonal of a matrix stored in the SLAP Column format ssilus Incomplete LU Decomposition Preconditioner SLAP Set Up Routine to generate the incomplete LDU decomposition of a matrix The unit lower triangular factor L is stored by rows and the unit upper triangular factor U is ATENA Input File Format 33 stored b
81. SIZE n in which case it has slightly different meaning see below RELATIVE ERROR The convergence criteria values are computed using the Euclidean norm The error is then computed by dividing an iterative value with the value cumulated within the whole step Note that this keyword can be used also in conjugation with the input NEGLIGIBLE SIZE n in which case it has slightly different meaning see below RESIDUAL ERROR x Convergence limit for absolute value of residual forces Default value is 0 01 E g RESIDUAL ERROR x DISPLACEMENT ERROR Convergence limit for absolute value of displacement increments x Default value is 0 01 E g DISPLACEMENT ERROR x ENERGY ERROR x Convergence limit for value of residual energy i e norm of displacement increment multiplied by norm of residual forces 34 STEP STOP RESIDUAL ERROR FACTOR x STEP STOP DISPLACEME NT ERROR FACTOR x STEP STOP ENERGY ERROR FACTOR x ITER STOP RESIDUAL ERROR FACTOR x ITER STOP DISPLACEME NT ERROR FACTOR x ITER STOP ENERGY ERROR FACTOR x NEGLIGIBLE SIZE x NEGLIGIBLE RESIDUAL x NEGLIGIBLE _DISPLACEMENT x Not used in transport analysis Default value is 0 01 E g RESIDUAL ERROR x Factors for appropriate convergence criterion value Ifa convergence criterion value multiplied by the appropriate factor exceeds the related calculated analysis error then the execution is immediately killed They are two sets of factors the first one
82. SK OL OO K ft Ko Yr E YS c0 D D fE 00 1 DFO D D fE OF OL O D D fi MA O ww D wgrav D x Ja Dyerav A Jo Diri T t Default values All functions are constant and equal to one i e they are disregarded All other parameters are by default zero with the following exceptions 260 C 22558 Ds gg 0 m sm J J C 2 55 6 K 2 1 dd mu T smC Table 164 amp Parameters of the amp CCTransportMaterialLevel7 within the transport analysis Parameter Description DOH FNC ID id Id of degree of hydration DoH time function It prevails input of DOH25 FNC ID and analytical calculation of DoH time using B2 ALPHAINF and ETA DOH25 FNC ID id Id of degree of hydration DoH25 time function i e DoH function for reference temperature 25 C and relative humidity 1 It is overwriten by DOH ID prevails analytical calculation of DoH time using B2 ALPHAINF and ETA Bl val B hydration parameter see Atena Theory manual Units time Default value 0 5 hour 0 0001389sec B hydration parameter see Atena Theory manual Units Default value 0 001 ALPHAINF val Ultimate hydration degree o Units Default value 0 85 Microdiffusion of free water through formed hydrates 7 Units Default value 7 Material parameter in Eqn to compute reduction of capillary moisture Units ATENA Input
83. SUPPORT SIMPLE node 4 dof 2 value 0 0 SUPPORT SIMPLE node 1 dof 1 value 0 0 SUPPORT SIMPLE node 1 dof 2 value 0 0 ATENA Input File Format SUPPORT SIMPLE node 7 dof 1 value 0 0 SUPPORT SIMPLE node 7 dof 3 value 0 0 SUPPORT SIMPLE node 8 dof 1 value 0 0 SUPPORT SIMPLE node 8 dof 3 value 0 0 SUPPORT SIMPLE node 5 dof 1 value 0 0 SUPPORT SIMPLE node 3 dof 1 value 0 0 SUPPORT SIMPLE node 2 dof 1 value 0 0 SUPPORT COMPLEX master 49 1 1 0 slave 50 1 SUPPORT COMPLEX master 49 1 1 0 slave 51 1 SUPPORT COMPLEX master 49 1 1 0 slave 521 SUPPORT COMPLEX master 49 1 1 0 slave 53 1 SUPPORT COMPLEX master 49 1 1 0 slave 54 1 SUPPORT COMPLEX master 49 1 1 0 slave 55 1 SUPPORT COMPLEX master 49 1 1 0 slave 56 1 Load case No 2 LOAD CASE id 2 name Concetrated force LOAD SIMPLE node 49 dof 1 value 0 25 LOAD SIMPLE node 51 dof 1 value 0 25 LOAD SIMPLE node 54 dof 1 value 0 25 LOAD SIMPLE node 56 dof 1 value 0 25 NODAL SETTING node 49 vel 0 0030 0 node 50 vel 0 0030 0 node 51 vel 0 0030 0 node 52 vel 0 0030 0 node 55 vel 0 0030 0 node 54 vel 0 0030 0 node 55 vel 0 0030 0 accel 0 005370861556 0 0 accel 0 005370861556 0 0 accel 0 005370861556 0 0 accel 0 005370861556 0 0 accel 0 005370861556 0 0 accel 0 005370861556 0 0 accel 0 005370861556 0 0 oO o 215 216 node 56 vel 0 0030 0 0 accel 0 005370861556 0 0 node 45 vel 0 0030 0 0 accel 0 005370
84. Some data are available only on one location type e g displacement are of type LOCATION NODES the other have more e g stress has LOCATION NODES LOCATION ELEMENT NODE and ELEMENT INTERNAL POINT The location is also used for TRACE ON OFF specification see below amp LOCATION LIST Output location i e list of nodes elements etc where the data should be output By default output is done at all available locations Hence for example in case of LOCATION IPS the location list GROUP 1 ELEMENTS 2 TO 5 prints data at all internal points of elements 2 3 4 and 5 of group no 1 list GROUP 2 TO 5 produces output at all IPs of all elements for groups 2 through 5 etc amp INTERVAL Location interval for output Alternatively location interval can be specified by selection list MULTI SELECTIO Location ids for output are set by the selection list N multi selection list E g Ids of integration points are input multi selection list sequentially in the selection list as follows group element ip i 1 number of input IPs List of data to be output Each data is characterized by associated output keyword Actual list of available output keyword is in ATENA created dynamically based on current status of the analysis This list can be printed out in self explanatory format by 194 TRACE OFF ON RECOVERY LUMPED VARIATIONAL NEAREST IP MAXIMUM MINIMUM SUMM ATION AVERAGE TRACK RECORD the command OUTPUT
85. amp MOISTURE FLUX DUE TO RELATIVE HUMIDITY GRADIENT amp MOISTURE FLUX DUE TO HUMIDITY RATIO GRADIENT amp MOISTURE FLUX DUE TO CEMSTONE CALC amp HEAT FLUX DUE TO TEMPERATURE GRADIENT amp HEAT FLUX DUE TO EVAPORATED MOISTURE amp COMMON MOIST TEMP BC DATA amp ELEM LOAD DATA GROUP group id group id to BY group id by ELEMENT element id element id to BY element id by SELECTION list name 311 COEFF const COEFF X coeff COEFF Y coeff y COEFF 7 coeff z amp MOISTURE FLUX DUE TO RELATIVE HUMIDITY GRADIENT ACCOUNT NEGLECT GRADIENT OF RELATIVE HUMIDITY CONVECTION W cw amp MOISTURE_ FLUX DUE TO HUMIDITY RATIO GRADIENT ACCOUNT NEGLECT GRADIENT OF HUMIDITY RATIO EVAPORATION MOISTURE AIR PRESSURE p AIR VELOCITY v AIR VELOCITY FUNCTION air velocity fnc id amp MOISTURE FLUX DUE TO CEMSTONE CALC ACCOUNT NEGLECT GRADIENT OF HUMIDITY CEMSTONE CALC amp HEAT FLUX DUE TEMPERATURE GRADIENT ACCOUNT NEGLECT GRADIENT OF TEMPERATURE CONVECTION T h EMISSIVITY T amp HEAT FLUX DUE TO EVAPORATED MOISTURE ACCOUNT NEGLECT GRADIENT OF EVAPORATED MOISTURE EVAPORATION HEATA amp COMMON MOIST TEMP DATA AMBIENT HUMIDITY 7 MOIST FUNCTION moist fnc id ATENA Input File Format 273 AMBIENT TEMPERATURET TEMP FUNCTION tempt_fnc_id NODES boundary nodes list EDGE EDGE NO DUPLICATES SURFACE Importan
86. ection name TOTAL INCREMENT INCREMENTAL GENERATE CONST const vector COEFF X coeff x vector COEFF Y coeff y vector COEFF Z coeff z vector ATENA Input File Format 71 Table 60 Nodal Initial Imperfections Definition generated entries Sub Command SELECTION Name of selection for which the generation is requested selection name GENERATE Keyword for entities to be generated The values in global GENERATE VEL structural directions are generated as linear combination CONST const vector COEFF X coeff x vector COEFF Y 2 value const 1 x coeff 1 y coeff 1 z coeff 1 COEFF Z coeff z vecor value const 2 coeff 2 y coeff 2 2 coeff 2 value 3 x coeff 3 3 z coeff 3 x y z are coordinates of nodes where the generation is processed The vector of values e g const vector must include 3 or 2 values for 2D or 3D problems respectively TOTAL INCREMENT Set input for total or incremental with respect to the reference INCREMENTAL coordinates values of the imperfect structural geometry Example NODAL IMPEFECTIONS SETTINGS 3D NODE 2 TOTAL VALUES 0 0 0 001 NODE 3 INCREMENT VALUES 0 0 0 0015 NODAL IMPEFECTIONS SETTINGS 2D NODE 2 TOTAL VALUES 0 0 001 NODE 3 INCREMENTAL VALUES 0 0 0015 NODAL SETTING SELECTION all nodes TOTAL CONST 25 12 24 COEFF X 0 0 0 COEFF Y 0 0 0 COEFF Z 0 0 0 01 GENERATE 3D 4 3 Ma
87. elemprop will be copied elemprop SOURCE NODEPROP Selection list of source nodes whose copy should nodeprop be included in a new node selection Name of the selection will be concatenation of destination elemprop and nodeprop If more copies are generated see ACCOMPLISH count TIMES data the name is appended by n where n is number of additional copy The same applies for destination SOURCE_GROUP id Id of element group that contains the elements SOURCE ELEMPROP elemprop By default GROUP eroup id is used ACCOMPLISH count Specifies number of copies to be generated By default one copy TIMES is created i e count 1 Example MACRO ELEMENT 1001 GENERATE TYPE CCCopyElementSelection THROUGH NODES 102 107 104 202 GROUP 1 NAME Macro block 2 ELEMPROP Block 2 SOURCE NODES 101 102 103 201 SOURCE ELEMPROP Block 1 SOURCE NODEPROP NIN4N5N8 NS5N6N7NS NSN8 NSN6 EXECUTE 250 4 10 4 4 CCExtrudeElementSelection MACRO ELEM DATA SPEC data This type of macroelement is used when some elements should be generated as an extrusion of elements of a surface Such an extrusion can be accomplished several times thereby generating e g a set of layers for modeling a complex interphase between two solid blocks The macroelement reads element group and ids of nodes of the source surface from which the extrusion takes place and it also reads a vector
88. example QUAD lt xxxx gt defines linear quadrilateral macroelement lt gt is quadratic quadrilateral macroelement with Serendipity approximation etc DIR dir id DIVISION nr nr is number of finite elements generated in each principal DR drj direction dir id By default elements size dr in principal direction dir id is 1 nr However it is possible to assign dr explicitly nr values are expected for each dir id If less values are input the list is toped up with the last input value If sum of all input dr for a particular dir id doesn t match 1 it is adjusted appropriately For example DIR 2 DIVISION 5 DR 1 2 will generate 5 elements in direction s the first of them having half size of the others LINEAR QUADRATIC Linear or quadratic finite elements will be generated Note that this input should not be mixed with linear or quadratic shape of macroelement in use Example MACRO ELEMENT 1000 GENERATE TYPE CCIsoMacroElement lt xxxxxxxx_x_x gt THROUGH NODES 201 202 204 203 101 102 104 103 205 206 GROUP 1 COUNTER ELEMENT BASE 1 NODAL BASE 1 NAME Macro block 1 ELEMPROP Block 1 NODEPROP NI ID 1 NODEPROP N2 ID2 NODEPROP N3 ID 3 NODEPROP N4 ID 4 NODEPROP N5 ID 5 NODEPROP N6 ID 6 NODEPROP N7 ID 7 NODEPROP N8 ID 8 QUADRATIC SHAPE HEXA DIR 1 DIVISION 4 DIR 2 DIVISION 3 DIR 3 DIVISION2 DR0O 20 2 EXECUTE 4 10 4 3 CCCopyElementSelection MACRO ELEM DATA SPE
89. f Generation formula 2 6000 15 5R JR f f this cu formula is valid only if amp is compressive cube strength given as positive number in MPa MU POISSON NY Poisson s ratio 80 Units none Acceptable range lt 0 0 5 Default value 0 2 FT RT F_T R_T x Tensile strength Units 17 Acceptable range 0 maximal real number gt Default value 3 f f 2 Generation formula FT 0 24 R3 Jed fe FC RC F_C R_C Compressive strength Units F P Acceptable range lt minimal real number 0 Default value 30 f f Generation formula FC 0 85 R frl f Tensile properties GF x Specific fracture energy Units F l Acceptable range 0 maximal real number Default value 0 0001 f f Generation formula GF 0 000025 FT CRACK SPACING x Crack spacing average distance between cracks after localization If zero crack spacing is assumed to be equal to finite element size Units 1 Acceptable range lt 0 maximal real number gt Default value 0 0 TENSION_ STIFF x Tension stiffening Units none Acceptable range lt 0 1 gt Default value 0 0 Compressive properties ATENA Input File Format 81 EPS_CP x Plastic strain at compressive strength Units none Acceptable range lt minimal real number 0 gt Default value 0 001 Generation formula FC E FCO F CO RCO Onset of non linear behavior in compression Ben Units 17 Acceptable ran
90. for checking each iteration and the other one to be exercised at the end of each step The default value for iteration related factors is 1000 whilst the default value for step related factors is 10 E g SET Absolute stop displacement error factor 15 Step stop displacement error factor 10 Step stop residual error factor 53 Iter stop displacement error factor 201 Iter stop residual error factor 203 SET Relative Step stop displacement error factor 54 Step stop energy error factor 55 Step stop residual error factor 56 Iter stop displacement error factor 204 Iter stop energy error factor 205 Iter stop residual error factor 206 Size that is already negligible It affects accuracy of the analysis particularly calculations of master slave BCs fixing of discrete reinforcement and the surrounding solids etc For example points are assumed identical if the distance between them is less than the absolute negligible size Each element must have at each direction size greater than the absolute negligable size Most iterative procedures compute with accuracy equal to the absolute negligible size For all the comparisons only the ABSOLUTE negligible size is used The relative negligable size is employed only to calculate the absolute negligible size if not input directly If absolute negligible size is not specified it is calculated as the product of relative negligible size and the minimum size in x y z direction of the analyzed problem
91. formulation i e the stress at each step will be calculated from zero by incremental application of the existing strain tensor The parameter n defines the number of steps to reach the current strain valus When this parameter is activated the material model does not consider the loading history but it is necessary to accurately consider the changes of the elastic modulus in the incremental material formulation Units none Acceptable range 1 maximal integer Default value 0 4 3 13 Material Type for Material with Properties Varying in Space 4 3 13 1 Sub command amp MATERIAL WITH RANDOM FIELDS This model is to be used to simulate a spatial distribution of material properties For instance this model can be used to simulate a random distribution of material parameters over the structure Syntax amp MATERIAL WITH RANDOM FIELDS TYPE CCMaterialWithRandomFields BASE id FILENAME namel ATENA Input File Format 163 Table 100 amp MATERIAL WITH RANDOM FIELDS sub command parameters Basic properties BASE id Id of the previously defined base material whose parameters will be modified based on the thermal loading and the provided function Only the following materials should be used as a base material CC3DNonLinCementitious2 CC1DElastIstotropic CCPlaneStressElastIsotropic CCPlaneStrainElastIsotropic CC3DelastlIsotropic CCASymkblastlIsotropic CC3DDruckerPragerPlasticity CC3DBiLinearSteel VonMises CCRei
92. from selections sel groups sel groups sel elements become candidates for the generation If SOURCE GROUP SELECTION not specified all elements from the model are sel elements considered GENERATE NODES Data for the selection list generation The list will ELEMENT OF GROUP include either all nodes or all elements of the group GROUP FROM group id group id group id to from within distance x ATENA Input File Format 21 GROUP TO group id to with respect to the point defined by the macro nodes i WITHIN DISTANCE x FROM If group id id to is specified elements POINT MACRO NODES are generated otherwise nodes are generated The EXECUTE EXECUTE keyword forces to carry out the generation immediately Otherwise it is done prior a first step execution GENERATE NODES Data for the selection list generation The list will ELEMENT OF include either all nodes or all elements of the group GROUPIGROUP FROM group id group id to from within distance x group 11 GROUP TO with respect to the line defined by the macro nodes i group id to WITHIN and i2 If group id is specified elements are DISTANCE x FROM LINE generated otherwise nodes are generated The MACRO NODES i i2 EXECUTE keyword forces to carry out the generation EXECUTE INSIDE immediately Otherwise it is done prior a first step execution If the keyword INSIDE is used the generation is reestricted only
93. gl CERVENKA CONSULTING Cervenka Consulting s r o Na Hrebenkach 55 150 00 Prague Czech Republic Phone 420 220 610 018 E mail cervenka cervenka cz Web http www cervenka cz ATENA Program Documentation Part 6 ATENA Input File Format Written by Jan Cervenka and Libor Jendele Prague October 31 2014 Trademarks ATENA is registered trademark of Vladimir Cervenka Microsoft and Microsoft Windows are registered trademarks of Microsoft Corporation Other names may be trademarks of their respective owners Copyright 2000 2014 Cervenka Consulting s r o CONTENTS 1 INTRODUCTION AND SCOPE OF THE DOCUMENT 2 PROGRAM EXECUTION INPUTCOMMANDS 3 1 3 2 3 3 3 4 3 4 1 3 4 2 3 4 1 3 4 2 3 4 3 3 4 4 3 4 5 Changes of Input Commands Syntax in the New Version General Rules Main Input Commands Analysis Identification and Execution Settings The Command amp TASK The Command amp TERMINATE amp BREAK The Command amp JUMP amp LABEL The Command amp DEBUG The Command amp EVALUATE The Command amp BREAK_DEBUG The Command amp SELECTION 4 THECOMMAND amp SET 4 1 1 4 2 4 2 1 4 2 2 4 2 3 4 2 4 4 2 5 4 3 4 3 1 4 3 2 4 3 3 4 3 4 4 3 5 4 3 6 4 3 7 4 3 8 The Command amp UNITS Topology Definition The Command amp JOINT The Command amp LOCAL The Command amp GEOMETRY The command amp ELEMENT Geometrical imperfections amp NODAL IMPERFECTIONS Material Definition The Com
94. groups TO solid group id 2 NORMAL TINY If TINY size is defined then the algorithm used to generate SIZE elements of the bar works correctly even in the case that more neighboring NODES are located with the same elements If it is not the case use of NORMAL size is preferable as it results in much faster element generation Default value NORMAL SIZE MINIMUM x Minimum length of generated element If not satisfied newly generated node is ignored Default value 0 length units REPEAT n How many additional macro elements should be generated or reconnected By default n 0 i e only one macro element is produced This option make possible to generate a serie of macro elements using just one input definition DX 4 1 dx2 dx3 Distance in X direction between generated macro elements due 8 Not available in ATENA version 4 3 1 and older 252 to REPEAT n gt 0 If less then n values are input the missing DY 1 2 l entries are derived from the most recent DX input By default DZ 421 422 423 dx 0 The same for DY and DZ input RESET EMBEDDED Clear all input in EMBEDDED IN SOLID SOLIDS AT FROM solid I RECONNECT NODES Reconnect generated nodes into the surronding solids Useful for the case of macro elements update needed in simulating a construction process PROCESS FLAG Process flags have the same meaning as for master slave boundary conditions
95. gt Recommended range 2 2 Default value 0 0 RHO Specific material density Format RHO x Units Acceptable range lt 0 maximal real number gt Default value 0 0023 f f ALPHA Coefficient of thermal expansion Format ALPHA x Units 1 T ATENA Input File Format 105 Default value 0 000012 Fixed smeared crack model will be used Format FIXED x Units none Acceptable range lt 0 gt Default value 1 25 FT MULTIP x Multiplier for tensile strength in the plastic part of the fracture plastic model in order to ensure that plastic surface and fracture surface intersect each other Units none Acceptable range lt 0 gt Default value 2 1 SHEAR FACTOR x Shear factor that is used for the calculation of cracking shear stiffness This factor can be used to adjust any value calculated by the SHCC model Normally it is recommended to be set to 1 0 Units none Acceptable range lt 0 gt Default value 1 UNLOADING x Unloading factor which controls crack closure stiffness Acceptable range lt 0 1 gt 0 unloading to origin default 1 unloading direction parallel to the initial elastic stiffness IDEALISATION Defines the idealisation if material model with higher dimension is to be used in a finite element with lower dimension For instance in case a 3D model is to be used in 2D configuration Units none Acceptable range 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D Def
96. higher dimension is to be used in a finite element with lower dimension For instance in case a 3D model is to be used in 2D configuration Units none Acceptable range 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 30 SHELL BEAM 3D MEMBRANE AXI Default value program tries to determine a suitable idealisation based on the dimension of the material model and the dimension of the finite element where it is used So in most cases it is not needed to use this command In certain cases however the program cannot determine correctly the idealisation to use Such a case is for instance if a 3D model is to be used in 2D element Then it is necessary to directly specify if plane stress or strain idealisation is to be used 4 3 2 Cementitious Materials 4 3 2 1 Sub command amp 3DCEMENTITIOUS Syntax amp 3DCEMENTITIOUS TYPE CC3DCementitious Ex POISSON NY 3 x FT RT F T R tFCJRC F C R GFx WD x EXC x BETA RHO x ALPHA x FT MULTIP x SHEAR FACTOR x UNLOADING x IDEALISATION 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D DAMPING MASS xyv DAMPING STIFF xx The parameters for this material model can be generated based on compressive cube strength of concrete see Table 64 This value should be specified in MPa and then transformed to the current units Table 64 amp 3DCEMENTITIOUS sub command parameters Parameter Description Basic properties Ex Elastic
97. i e at time 0 a degree of freedom without any LHS and or RHS boundary condition means a degree of freedom belonging to impermeable surface There are a few input commands that are meaningful only for transport analysis These are commands e related to temporal time integration amp Transport Set parameters and problem s time step marching execution as it is needed for definition of transport finite element amp Transport finite elements e specifying transport constitutive material model amp Transport constitutive material inputting structural initial state conditions amp Transport initial value of state variables amp History export related commands amp Transport analysis additional output data ATENA Input File Format 255 Note also that only Modified Newton Raphson or Full Newton Raphson execution method can be used 4 11 1 Transport constitutive material model The amp MATERIAL TYPE PARAMS from amp MATERIAL command for the case of transport analysis reads amp MATERIAL TYPE PARAMS TYPE amp CCModelBaXi94 PARAMS amp CCTransportMaterial PARAMS amp CCTransportMaterialLevel7 PARAMS amp CCModelBaXi94 PARAMS CCModelBaXi94 CONCRETE CONCRETE TYPE n type RATIO WC ratio CEMENT WEIGHT cem weight TEMPERATURE TEMP Hx K TEMP TEMP x TEMP W x TEMP GRAV C TEMP Hx C TEMP TEMP x C TEMP W x TEMP ID x K_ TEMP TEMP ID x TEMP W
98. including confinement effects amp VON MISES PLASTICITY Plastic materials with Von Mises yield condition e g suitable for steel amp DRUCKER PRAGER PLASTICITY Plastic materials with Drucker Prager yield condition amp USER MATERIAL User defined material derived from elastic isotropic The user provides a dynamic link library amp INTERFACE MATERIAL Interface material for 2D and 3D analysis amp REINFORCEMENT Material for discrete reinforcement amp REINFORCEMENT WITH Material for discrete reinforcement subject to CYCLING BEHAVIOR cycling loading amp SMEARED REINFORCEMENT Material for smeared reinforcement amp SPRING Material for spring type boundary condition elements i e for truss element modeling a spring amp MICROPLANE Bazant Microplane material models for concrete amp CREEP MATERIAL Material for creep analysis These are CCModelB3 Bazant Baweja B3 model CCB3Improved model same as the above with support for specified time and humidity history 74 CCModelBP_KX creep model developed by Bazant Kim 1991 CCModelCEB FIP creep model advocated by CEB FIP 1978 CCModelACI 78 creep model by ACI Committee in 1978 CCModelCSN731202 model recommended by CSN731202 CCModelBP1 full version of the creep model developed by Bazant Panulla CCModelBP2 simplified version of the above model CCModelGeneral creep model for direct input of material compliance strength and shrinkage at time
99. is marked as not converged step UNUSE BEST ITERATION FOR CRI Same as the above but it removes the specified TERION convregence criteria for best iteration engine If UNUSE BEST ITERATION FOR CRI all criteria are removed no best iteration strategy TERIA n n2 is used BEST ITERATION MIN IDn Minimum iteration id for which the iteration is always stored i e regardless its convergence performance Any subsequent iteration is stored only if its convergence is better than convergence of any previous iteration STEP LOAD REDUCTION ALLOWA If 170 and the iterating process within the current NCEn step does not yield a converged solution then the REDUCE STEP LOAD COEFF v current step is re executed for a reduced load increment This step s re execution is allowed n times and the load increment in the current re exection is reduced by factor v where i 1 n i e number of the step re execution By default v 0 5 and n 0 amp ANALYSIS TYPE STATIC TRANSIENT amp EIGENVALUES Table 7 amp ANALYSIS TYPE sub command parameters STATIC Specify static analysis There are no additional parameters amp TRANSIENT Set transient analysis and set some parameters for it amp EIGENVALUES Set some parametyers for eigenvalues analysis amp TRANSIENT TRANSIENT TIME CURRENT x TIME INCREMENT x TIME INTEGRATION CRANK NICHOLSON THETA x ADAMS BASHFORTH NEWMARK BETA x NEWMARK GAMMA x HUGHES ALPHA
100. master nodes or quadrilateral element i e 4 master nodes For 3D case the master nodes must form line i e 2 master nodes tetrahedron 4 master nodes triangle wedge i e 6 master nodes or cube element i e 8 master nodes The master nodes must be input in exactly the same order as used to describe element incidences for an element of the equal type If nonlinear elements are used then SHAPE shape input must specified It describes shape of the embedded adjacent elements It is 1 2 3 4 5 6 for element of shape 3 nodes truss 6 nodes triangle 6 8 or 9 nodes quadrilateral 16 or 18 or 20 nodes brick 10 nodes tetrahedron 15 nodes wedge respectively By default the amp MS GROUPS and amp MS PAIRS boundary conditions are only accepted if the slave nodes are located inside an element defined by the master nodes or closed to the master node respectively The required accuracy is defined by the parameter DISTANCE This behavior can be changed by using the flag ACCEPT OUTSIDE ELEMENT If it is defined the boundary conditions are always accepted Note that specifying ACCEPT OUTSIDE ELEMENT causes skipping some topological checks of the input data that are aimed to trap an errorness user input Hence it should be used with the highest care The ACCEPT OUTSIDE ELEMENT flag does not affect the amp MS SELECTION boundary conditions By default the PAIRS command alternative is assumed The command allows definition one or more of s
101. modulus Units Acceptable range 0 maximal real number Default value 30 x 10 f f ATENA Input File Format MU POISSON NY X FT RT F T R Tix FC RC F_C R x Z7 Generation formula 2 6000 15 5R 2 8 f f this formula is valid only if 15 compressive cube strength given as positive number in MPa Poisson s ratio Units none Acceptable range lt 0 0 5 Default value 0 2 Tensile strength Units 17 Acceptable range 0 maximal real number gt Default value 3 f f 2 Generation formula FT 0 24R f 7 Compressive strength Units 17 Acceptable range minimal real number 0 Default value 30 f f Generation formula FC 0 85 R fpl f Tensile properties GF x Tomeraa e O properties WD x Miscellaneous TETT EXC x Specific fracture energy Units F l Acceptable range 0 maximal real number gt Default value 0 0001 f f formula GF 0 000025 FT Critical compressive displacement Units 1 Acceptable range lt 0 maximal real number gt Default value 0 0005 Eccentricity defining the shape of the failure surface Units Acceptable range lt 0 5 1 0 gt 78 Default value 0 52 ALPHA x FIXED x FT MULTIP x SHEAR FACTOR x UNLOADING x Multiplier for the direction of the plastic flow Units Acceptable range minimal real number maximal real number gt Recommended
102. n eigenvals eigenvals amp where n_eigenvals is the number of required eigenvalues Defines stiffness matrix coefficient for proportional damping Cee ile E g DAMPING STIFFNESS COEFFICIENT 0 8 E g DAMPING MASS COEFFICIENT 0 8 shift Eigenvalue is 2 power of structural circular eigenfrequency NORMALIZE EIGENV Flag for request to normalize eigenvectors during iterations ECTORS YES NOj Although this normalizing is source of a small CPU time overhead it is recommended because it improves numerical stability of the eigenmode analysis 4 8 7 Eigenvalues and eigenvectors analysis execution command Eigenvectors and eigenmodes analysis is executed by the following commands Syntax amp EIGENVECTORS amp STATIC STEP DEFINITION Static step definition defines structural boundary Dirichlet conditons and is the same as for the case of static analysis 210 4 8 8 Sample input data for transient dynamic analysis The following lines are an example of input data to analyze a cantilever subject to harmonic concentrated load at its free end The structure is modeled by a few shell elements It has a proportional damping Forced Vibration Analysis of a Spring Mass System see vynucene_kmitani mws with proportional dumping 3 nonlinear shells 4th shell as lumped mass at the end for a finer analysis change e g SET TRANSIENT TIME INCREMENT 0 02 for Nemark method change eg SET TRAN
103. n nutnl 8 1 4 n nu nl DCG I ssds scg S 4 11 8 1 5 n For large symmetric well posed problems ICCG I ssics scg 5 4 12 nel n 8 1 5 For large symmetric n nel problems recommended DCGN I ssd2s scgn SNS 4 11 8 1 8 n For large non symmetric well posed problems LUCN I ssilus scgn SNS 4 I13 4 n nl nl 8 1 For large non 8 n nl nu symmetric problems recommended DBCG I ssds sbcg SNS 4 11 8 1 8 n LUBC I ssilus sbcg SNS 4 134 4 n nl nu 8 1 8 n nu nl DCGS I ssds Scgs SNS 4 11 8 1 8 n LUCS I ssilus scgs SNS 4 13 4 n nl nu 8 1 8 n nu nl DOMN I ssds somn SNS 4 11 8 1 4 n nsav e 3 n nsave 1 LUOM I ssilus somn SNS 4 13 4 n nutnl 8 1 1 4 3 1 DGMR I ssds sgmres SNS 4 31 8 2 n n nsav 32 e 6 nsave nsave 3 LUGM I ssilus sgmres SNS 4 33 4 n nl nu 8 2 n nutnl n nsavet 6 nsave nsave 3 In the above n is number of degree of freedom of the problem ne is the number of nonzeroes in the lower triangle of the problem matrix including the diagonal nl and is the number of nonzeroes in the lower resp upper triangle of the matrix excluding the diagonal Table 11 EXECUTION PHASES Phase name Description Preconditioned Iterative Refinement sparse Ax b solver Routine to solve a general linear system Ax b using iterative refinement with a matrix splitting
104. or command from to the both monitors i e it operates on both sets MONITOR 1 and MONITOR 2 It has nothing to do with definition of a particular output data monitoring The way of using the keywords PLOT PLOT 1 PLOT 2 is nearly the same as the use of the keyword MONITOR MONITOR 1 MONITOR 2 When specified it also creates a set of data that can be printed or drawn in 2D plots The following table points out the differences Keyword PLOT MONITOR PLOT 1 MONITOR 1 PLOT 2 MONITOR 2 Output definition produces Yes No actual output Output is produced No automatically at each step iteration during execution Output data are arranged by the current atime at lines where each line time single automatic 191 192 corresponds to line marked t 0 execution of the output command many lines marked with current f RAM requirements for storing output Small Only current data are stored Large Full history is maintained The data are typically drawn a fixed time at a single location at many times as 2D plots at It need not always be the case and many locations SPLIT MONITOR Split the monitor by location or leave it untouched By default the DATA BY LOCAT monitor is not splitted For example if we have monitor ION NODAL DISPLACEMENT it can be split to separate monitors UNSPLIT MONIT NODAL DISPLACEMEN
105. parameter the associated selection list will be given that name The above applies for PROP GENERATION NONE and PROP GENERATION SEMIAUTOMATIC If PROP GENERATION equals to AUTOMATIC then the nodeprop is ignored or reserved and DEF VERTEX FMT FOR NODES verfex fint definition is used instead Default N V i Example N Vertex i In this case e g all finite nodes associated with a vertex 13 will be listed in a selection list that calls N Vertex13 The same definition as the above for DEF VERTEX FMT FOR NODES however it applies for macro nodes Default NSMN i Example N MacroNode 1 In this case e g all finite nodes associated with a macro node 13 will be listed in a selection list that calls N MacroNodel3 The same definition as the above for DEF VERTEX FMT FOR NODES however it applies for curves Default SN C i Example N Curve i In this case e g all finite nodes associated with a curve 13 will be listed in a selection list that calls NS Curvel3 The same definition as the above for DEF VERTEX FMT FOR NODES however it applies for patches Default SN P i Example N Patch9oi In this case e g all finite nodes associated with a ATENA Input File Format 243 patch 13 will be listed in a selection list that calls N Patch13 DEF SURFACE FMT FOR NODE The same definition as the above for S surface fmt DEF VERTEX FMT FOR NODES however it applies for
106. range 2 2 Default value 0 0 Material density Units M P Acceptable range lt 0 maximal real number gt Default value 0 0023 f f Coefficient of thermal expansion Units 1 T Acceptable range lt 0 maximal real number gt Default value 0 000012 Fixed smeared crack model will be used Units none Acceptable range lt 0 gt Default value 0 25 Multiplier for tensile strength in the plastic part of the fracture plastic model in order to ensure that plastic surface and fracture surface intersect each other Units none Acceptable range lt 0 gt Default value 2 1 Shear factor that is used for the calculation of cracking shear stiffness It is calculated as a multiple of the corresponding minimal normal crack stiffness that is based on the tensile softening law Units none Acceptable range lt 0 gt Default value 20 Unloading factor which controls crack closure stiffness Acceptable range lt 0 1 gt 0 unloading to origin default 1 unloading direction parallel to the initial elastic stiffness ATENA Input File Format 79 IDEALISATION Defines the idealisation if material model with higher dimension is to be used in a finite element with lower dimension For instance in case a 3D model is to be used in 2D configuration Units none Acceptable range 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D Default value program tries to determine a suitable idealisation ba
107. should be generated In other words the bar will be embedded in the specified material groups If TINE size is defined then the algorithm used to generate elements of the smeared reinforcement planes works correctly even in the case that more neighboring NODES are located with the same elements If it is not the case use of NORMAL size is preferable as it results in much faster element generation Default value NORMAL Minimum distance between nodes of generated element If not satisfied newly generated node is ignored Default value 0 length units MACRO ELEMENT 1001 GENERATE TYPE CCDiscretePlaneReinforcementME PLANE 1 THROUGH NODES 1001 1005 1006 1004 PLANE 2 THROUGH NODES 1005 1002 1003 PLANE 3 THROUGH NODES 1005 1003 1006 NAME Bottom reinforcement MINIMUM 0 GROUP 10 EMBEDDED AT 1 ELEMPROP Plame 1 NODEPROP NI ID 1 NODEPROP N2 ID2 NODEPROP N3 ID 3 NODEPROP N4 ID 4 EXECUTE MACRO ELEMENT 1001 GENERATE TYPE CCDiscreteReinforcementME THROUGH NODES 100 101 NAME Bottom reinforcement MINIMUM 0 GROUP 2 EMBEDDED AT 1 254 ELEMPROP Bar_1 NODEPROP N1 ID 1 NODEPROP N2 ID 2 4 11 Transport Analysis Related Commands The moisture and humidity transport analysis in ATENA has been developed in a CCStructuresTransport engineering module Hence the M module name parameter from the ATENA command line must read M CCStructuresTransport The CCStructuresTransport module is an extensio
108. surface id ELEMGROUP triangle group id quad group id PATCH patch id ELEMGROUP triangle group id quad group id SHELL shell id ELEMGROUP triangle group id quad group id REGION region id ELEMGROUP fetra group id pyram group id wedge group id hexa group id The parameter has to be used in order to say to ATENA what element group should be used for the generated elements As T3D generator is capable of generating mixed type FE mesh i e a mesh of several element types and as in ATENA one element group can contain only one element type it is necessary to input for 2D T3D entities two element groups one for triangle and the other for quadrilateral elements and similarly four element groups for 3D T3D regions tetrahedra pyramids wedges and hexahedra i e bricks Note that model id i e id from a T3D command will probably differ from generated FEM entity id For example vertex id will probably differ from generated FEM node id at the same location This is particularly the case if T3D is used also for optimisation of solution matrix band 4 10 1 4 The subcommand REMOVE T3D command REMOVE removes entity and all dependent entities dependent on it from the model The command syntax is REMOVE VERTEX vertex id CURVE curve id SURFACE surface id PATCH patch id SHELL shell id REGION region id ALL Use of the above new T3D commands and subcommands is demonstrated in the enclosed sample AtenaWin analyses
109. surfaces Default SN S i Example N Surface i In this case e g all finite nodes associated with a surface 13 will be listed in a selection list that calls N Surfacel3 DEF SHELL FMT FOR NODES The same definition as the above for shell fmt DEF VERTEX FMT FOR NODES however it applies for shells Default N H i Example N Shell i In this case e g all finite nodes associated with a shell 13 will be listed in a selection list that calls N Shell13 DEF REGION FMT FOR NODES The same definition as the above for region_fmt DEF VERTEX FMT FOR NODES however it applies for regions Default SN R i Example SN Region i In this case e g all finite nodes associated with a region 13 will be listed in a selection list that calls N Region13 DEF MELEMENT FMT FOR NOD The same definition as the above for ES DEF VERTEX FMT FOR NODES however it applies for macro elements The list will also include boundary nodes i e it is expanded list Default S NSME i Example N MacroElement 1 In this case e g all finite nodes associated with a macro element 13 will be listed in a selection list that calls N MacroElement13 DEF REINFORCEMENT FM The same definition as the above for T FOR NODES rc fmt DEF VERTEX FMT FOR NODES however it applies for reinforcement bar nodes The list will also include boundary nodes i e it is expanded list
110. that are replaces by actual shell coordinates Example THICKNESS EQN 0 2 x 0 001 y 0 002 amp BEAM 3D GEOMETRY SPEC Beam3D DETECT AXIS DETECT AXIS VECTOR x x2 x3 DETECT HEIGHT DETECT HEIGHT VECTOR x2 x3 NUMBER OF IPS IN SOLID HEIGHTS NUMBER n VALUES vall val2 val n WIDTHS NUMBER n VALUES vall val2 val DOMAINS NUMBER n MATERIAL n 0 QUAD IDS FROM n TO n BY n AT n LIST 11 12 REINFORCEMENT BARS NUMBER n MATERIAL mat id ST AREAa S COORDsT COORD 7 REDUCE XY REDUCE TAU XZ FULL TAU Table 48 amp BEAM 3D GEOMETRY SPEC sub command parameters Parameter Description SOLID The data that follow specify a solid ie concrete or REINFORCEMENT reinforcement i e steel layer HEIGHTS NUMBER n Total number of solid heights i e number of rows of the s t VALUES vall val2 val n raster It is followed of actual height values Isoparametric coordinates are used Otherwise the input heights are scaled so that their sum will equal to 2 WIDTHS NUMBER n Ditto for widths VALUES vall val2 val n DOMAINS NUMBER n Definition of material domains The quad ids are counted MATERIAL n 0 rowvise starting from the bottom left corner If material id is QUAD IDS FROM n TO zero a hole is assumed n BY n AT n LIST il i2 Number of reinforcement bars i e quads where BARS NUMBER n reinforcement is assumed MATERIAL id ST AREA a S
111. the element uses the same material types in all its material points the amp ELEMENT MATERIALS command can be omitted and a default material type specified in amp ELEMENT GROUP is adopted 70 E g 10 20 30 40 Eg 10 20 Note This command has to follow the command ELEMENT GROUP Each element material type s data must be input on a separate line 4 2 5 Geometrical imperfections amp NODAL IMPERFECTIONS The following command can be used to specify initial imperfections of structural geometry By default zero nodal imperfections are assumed The nodal imperfections can be set by the input command amp NODAL IMPERFECTIONS Syntax amp NODAL IMPERFECTIONS NODAL IMPERFECTIONS SETTINGS amp MANUAL IMPEREFECTIONS ENTRY amp GENERATED IMPEREFECTIONS ENTRY amp MANUAL IMPEREFECTIONS ENTRY NODE TOTAL INCREMENT INCREMENTAL VALUE VALUES val x val y val z Table 59 Nodal Initial Imperfections Definition manual entries Sub Command NODE n Set initial conditions for node n VALUE VALUES val Specify initial nodal imperfections in direction of global val y val 2 coordinates 3D problems need 3 values 2D problems only two values TOTAL INCREMENT Set input for total or incremental with respect to the reference INCREMENTAL coordinates values of the imperfect structural geometry amp GENERATED IMPEREFECTIONS ENTRY NODAL IMPERFECTIONS SETTING SELECTION se
112. the flow in direction of inwards normal to the boundary surface In the example below dT dy negative gt flow to the bottom i e in direction y ATENA Input File Format 279 top surface nodes 9 10 i e 1 internal forces negative i e 1555200 external load positive i e 1555200 bottom surface nodes 1 2 i e y 0 internal forces positive i e 1555200 external load negative 1 e 1555200 ALL EXTERNAL LOADS as well as NON ZERO LHS BCs i e fixing psi h HAVE INCREMENTAL CHARACTER This means that e g LOAD SIMPLE SELECTION all9 10 dof 2 const 1555200 applied to all steps will produce external forces 1555200 in the 1st step 3110400 in the 2nd step The same applies to nonzero SUPPORT SIMPLE specification To steps are applied step 1 see the load level defined above load case 1 step 2 doubles the above load load case 2 using deformation load increment or load case 3 using nodal force load increment or load case 4 using boundary load increment Use one of load case 2 4 to achieve the same loading Initial conditions for the example NODAL SETTING NODE 1 MATERIAL 1 TEMP 20 NODE 2 MATERIAL TYPE 1 TEMP 20 NODE 3 MATERIAL TYPE 1 TEMP 25 NODE 4 MATERIAL TYPE 1 TEMP 25 NODE 5 MATERIAL TYPE 1 TEMP 30 NODE 6 MATERIAL TYPE 1 TEMP 30 NODE 7 MATERIAL TYPE 1 TEMP 35 NODE 8 MATERIAL TYPE 1 TEMP 35 N
113. the function The base material should not be used in any other combined material as well as a stand alone material Otherwise results are unpredictable PARAMETER Units none Acceptable range any string Default value none 160 F Id of the previously defined function FUNCTION id Units none Acceptable range 1 maximal integer gt Default value none 4 3 12 Material Type for Material with Temperature Dependent Properties 4 3 12 1 Sub command amp MATERIAL_WITH_TEMP_DEP_PROPERTIES This model is to be used to simulate change of material properties due to current temperature The temperature fields can be imported from a previously performed thermal analysis Syntax amp MATERIAL WITH TEMP DEP PROPERTIES TYPE CCMaterialWithTempDepProperties BASE id PARAM namel F idl PARAM name F id2 PARAM name3 id3 EPS T id4 TOTAL n Table 99 amp MATERIAL WITH TEMP DEP PROPERTIES sub command parameters Parameter Description Basic properties BASE id Id of the previously defined base material whose parameters will be modified based on the thermal loading and the provided function Only the following materials should be used as a base material CC3DNonLinCementitious2 CC1DElastIstotropic CCPlaneStressElastIsotropic CCPlaneStrainElastIsotropic CC3Delastlsotropic CCASymElastlsotropic CC3DDruckerPragerPlasticity CC3DBiLinearSteel VonMises CCReinfor
114. to entities with a node located between the macro node i i2 GENERATE NODES Data for the selection list generation The list will ELEMENT OF include either all nodes or all elements of the group GROUP GROUP FROM group id group id to from within distance x group GROUP TO with respect to the plane defined by the macro nodes J group id to WITHIN i2 and i3 If group id is specified elements are DISTANCE x FROM PLANE generated otherwise nodes are generated The MACRO NODES i i2 i3 EXECUTE keyword forces to carry out the generation EXECUTE INSIDE immediately Otherwise it is done prior a first step execution If the keyword INSIDE is used the generation is reestricted only to entities with a node located between the macro node i i2 i3 GENERATE NODES Data for the selection list generation The list will ELEMENT OF include the nearest node or element of the group IGROUPI GROUP FROM group id group id to with respect to the il If group GROUP TO group id 15 specified an element is included group id to NEAREST otherwise a node is added The EXECUTE keyword MACRO NODES i forces to carry out the generation immediately EXECUTE Otherwise it is done prior a first step execution P Generated a multiselection that includes integrated IPS ENODE ENODES GNOD points or element nodes instead of global nodes Use E GNODES GNODE GNODES to generate selection wit
115. uniaxial compressive test Normally should be equal to 2 FC E Units none Acceptable range lt minimal real number 0 Default value 2 FC E COMPRED x Reduction of compressive strength due to cracks 118 Units none Acceptable range lt 0 1 gt Default value 0 8 Type of compression softening Units none Acceptable range lt 1 0 2 0 gt 1 0 Crush band 2 0 Softening modulus Default value 1 0 Case CSOFT 1 0 Crush band WDx Critical compressive displacement Units 1 Acceptable range lt 0 maximal real number gt Default value 0 0005 fi CD x Compression softening parameter Hidden Case CSOFT 2 0 Softening modulus WDx Critical compressive displacement Hidden CD x Compression softening parameter Units none Acceptable range 0 maximal real number Default value 0 2 Shear SHEAR x Shear retention factor Could be fixed or variable Format for fixed shear retention factor Picture MISC Shear Retention Fixed bmp SHEAR FIXED x Format for variable shear retention factor picture MISC Shear Retention Variable bmp SHEAR VARIABLE Units none Acceptable range for fixed value 0 1 07 Default value VARIABLE Tension compression interaction ATENA Input File Format 119 Units none Acceptable values 0 2 0 4 0 6 0 6 Linear 0 4 Hyperbola A 0 2 Hyperbola B Default value 0 6 Linear ROTATED CRACKS Activates rotated crack model If not used fixed crack model is
116. value none Generation formula default function should have the following points 0 000 1 00 0 040 1 25 102 000 CHAR SIZE TENSION Characteristic size for which the various tensile functions are valid Format CHAR SIZE TENSION x Units Acceptable range 0 maximal real number gt Default value 0 08 f Generation formula none X LOC TENSION Strain value after which the softening hardening becomes localized and therefore adjustment based on element size is needed Format X LOC TENSION x Units none Acceptable range 0 maximal real number Default value 0 04 Generation formula none CRACK SPACING x Crack spacing average distance between cracks after localization If zero crack spacing is assumed to be equal to finite element size Units 1 Acceptable range 0 maximal real number Default value 0 0 TENSION STIFF x Tension stiffening Units none Acceptable range 0 1 gt Default value 0 0 ATENA Input File Format 103 Compressive properties COMP SOFT HARD FUNCTION CHAR SIZE COMP X LOC COMP Index of the function defining the tensile hardening softening law The horizontal axis represents strains and vertical axis compressive strength which should be normalized with respect to f Format COMP SOFT HARD FUNCTION n Units none Acceptable range 1 maximal int number Default value none Generation formula default function should have the following poi
117. vector 71 used throughout definition of a shell local coordinated system see the Atena Theory Manual The vector is set by coordinates of finite element nodes node tail and node2 head By default this input need not be specified In such a case Atena kernel will construct 73 using the default definition from the Atena Theoretical Manual REF V1 VECTOR xyz Same as tha above but the arbitrary vector is input directly REF THICK x Reference thickness used to transform normalized layer coordinates to real coordinates By default this value is not specified and in this case actual shell thicknesses at integration points are used instead This input is particularly useful if a reinforcement layer is placed at constant distance from the shell bottom or top surface whereby the shell real thickness is variable INTERFACE Name of list that includes nodal ids where all 6 shell DOFs interface nodes list should be retained Use this feature to connect shell elements with other solid elements e g bricks REDUCE XZ YZ Reduce the specified shear s by 1 6 of its original value to REDUCE TAU XY compensate for constant shear strain thru cross section By FULL default no reduction is carried out recommended Ahmad elements use always full shear strains without any reduction 58 THICKNESS_EQN String containing equation to caculate shell s thickness It can eqn_string conation placeholders x y z
118. vector is input directly amp 3D GEOMETRY SPEC Table 42 amp 3D_GEOMETRY_SPEC sub command parameters Parameter Description none No parameters needed amp TRUSS GEOMETRY SPEC Truss AREA x Table 43 amp TRUSS_GEOMETRY_SPEC sub command parameters Parameter Description AREA Cross sectional area of a truss object E g AREA x amp SPRING GEOMETRY SPEC Spring AREA THICKNESS x LOCAL GLOBAL SPRING DIRECTION x ho Table 44 amp SPRING_GEOMETRY_SPEC sub command parameters Parameter Description AREA THICKNESS Cross sectional area or spring thickness of a point spring or line spring object respectively Default 1 0 E g AREA x LOCAL GLOBAL Spring direction in local or global coordinate system Local SPRING DIRECTION coordinate system is applicable only for line or plane springs By default global coordinate system is assumed ncoords coordinates defines direction vector ncoords equals to problem dimension from amp TASK The direction vector represents not only spring direction but also its length that is significant in case of geometrically nonlinear analyses E g LOCAL DIRECTION x x amp EXTERNAL CABLE GEOMETRY SPEC Cable AREA x FRICTION COEFFICIENT x FRICTION CONSTANT x RADIUS x FUNCTION SLIP sip function id FUNCTION LOCATION ATENA Input File Format 51 location_function_id FIXED PRES
119. with higher dimension is to be used in a finite element with lower dimension For instance in case a 3D model is to be used in 2D configuration Units none Acceptable range 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D Default value program tries to determine a suitable idealisation based on the dimension of the material model and the dimension of the finite element where it is used So in most cases it is not needed to use this command In certain cases however the program cannot determine correctly the idealisation to use such a case is for instance if a 3D model is to be used in 2D element Then it is necessary to directly specify if plane stress or strain idealisation 1s to be used amp CCMAR TYPE CCMAR amp CCM4RParams amp CCM4Params amp CCMARParams REF TEMPER x QR x CROx CR2xj Table 84 amp CCM4RParams sub command parameters Parameter Description REF TEMPER x Reference temperature Units C Default value 25 C QR x Activation energy constant Units K Default value 1000 K CRO x Boundary rate shape CRO constant Units ES sec Default value 10 sec 6 4 140 Boundary rate shape CR2 constant 1 Units sec Default value 8 5 E amp CCMARC TYPE CCMAR amp CCM4RCParams amp CCM4RParams amp CCM4Params amp CCMARCParams TIMEO x HUMIDITYO x TEMPERATUREO TAUI x NUMBER MAXWELL n Q1 Q2 x Q3 x Q4 x WCx CCx ACx Cx CI x CREEP
120. x UNLOADING x IDEALISATION 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D DAMPING MASS x DAMPING STIFF xx This material is identical to the previous material 3DNONLINCEMENTITIOUS but it is internally formulated purely incrementally while in the previous material only the plastic part of the model is fully incremental while the fracturing part is based on total formulation The parameters for this material model can be generated based on compressive cube strength of concrete AR see Table 65 This value should be specified in MPa and then transformed to the current units Table 66 amp 3DNONLINCEMENTITIOUS2 sub command parameters Basic properties Ex Elastic modulus Units 17 Acceptable range 0 maximal real number Default value 30 x 10 f f Generation formula 6000 15 5R XR fel fy this formula is valid only if is compressive cube strength given as positive number in MPa MU POISSON NY Poisson s ratio Units none Acceptable range lt 0 0 5 Default value 0 2 FT RT F_T R_T x Tensile strength Units 17 Acceptable range 0 maximal real number gt Default value 3 f f 2 Generation formula FT 0 2482 f f FC RC F C R Compressive strength Units 17 Acceptable range minimal real number 0 Default value 30 f f 84 Generation formula FC 0 85 5 f f 22 00 00027222271 propert
121. 0 1 MAXIMUM ETA x Sets Nmax x By default it is set to x 10 amp OPTIMIZE PARAMS OPTIMIZE BAND WIDTH SLOAN GIBBS POOLE NONE Table 27 amp OPTIMIZE PARAMS sub command parameters BAND Dummy keyword WIDTH Activates bandwidth minimisation and set default method to SLOAN SLOAN Use Sloan s algorithm for optimization process GIBBS POOLE Use Gibbs Poole s algorithm for optimization process NONE Don t optimize band width This is default setting ATENA Input File Format 43 amp SERIALIZE PARAMS SERIALIZE MODEL STATE BASICS AND NODAL AND ELEMENT ALL DEEP STANDARD Table 28 amp SERIALIZE PARAMS sub command parameters aa a as IMOEL Dummy E BASICS Stores just basic information about the model like number of nodes materials etc AND Dummy keyword S Dummy keyword o STATE Dummy keyword STANDARD Standard serialization depth i e only essential object data is serialized DEEP All data within objects are serialized amp FATIGUE PARAMS FATIGUE TASK f task FATIGUE CYCLES f cycles FATIGUE MAX FRACT STRAIN MULT f mult FATIGUE COD LOAD COEFF f codcoeff These parameters only have influence on materials that support fatigue see the description of the CC3DNonLinCementitious2Fatigue material Table 29 amp FATIGUE PARAMS sub command parameters Parameter Description FATIGUE TASK f task The FATIGUE TASK parameter determines the operation fatigue ca
122. 000 52 40 000000 0 00e 000 0 5000000 53 40 000000 1 0000000 0 5000000 54 40 000000 0 00e 000 0 00 000 55 40 000000 0 5000000 0 00e 000 56 40 000000 1 0000000 0 00e 000 ELEMENT GROUP id 1 name Spring type 1 material 1 geometry 1 ELEMENT INCIDENCES 1 1 13 15 3 6 18 20 8 9 14 10 2 19 12 7 4 5 2 13 25 27 15 18 30 32 20 21 26 22 14 23 31 24 19 29 17 3 25 37 39 27 30 42 44 32 33 38 34 26 35 43 36 31 41 29 4 37 49 51 39 42 54 56 44 45 50 46 38 47 55 48 43 53 41 ELEMENT TYPE ID 1 PREPARE CALCULATION Load case No 1 LOAD CASE id 1 name Permanent supports Joint support 16 28 40 28 40 52 ATENA Input File Format SUPPORT SIMPLE node 6 dof 1 value 0 0 SUPPORT SIMPLE node 6 dof 2 value 0 0 SUPPORT SIMPLE node dof 3 value 0 0 SUPPORT SIMPLE node SUPPORT SIMPLE node SUPPORT SIMPLE node SUPPORT SIMPLE node dof 1 value 0 0 dof 2 value 0 0 dof 1 value 0 0 dof 2 value 0 0 eS A Lf SUPPORT SIMPLE node 7 dof 1 value 0 0 SUPPORT SIMPLE node 7 dof 3 value 0 0 SUPPORT SIMPLE node 8 dof 1 value 0 0 SUPPORT SIMPLE node 8 dof 3 value 0 0 SUPPORT SIMPLE node 5 dof 1 value 0 0 SUPPORT SIMPLE node 3 dof 1 value 0 0 SUPPORT SIMPLE node 2 dof 1 value 0 0 l Options and switches l Parameters for dynam
123. 00e 000 1 0000000 14 10 000000 0 5000000 1 0000000 15 10 000000 1 0000000 1 0000000 ATENA Input File Format 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 4l 42 43 44 45 46 47 48 49 50 10 000000 10 000000 10 000000 10 000000 10 000000 15 000000 15 000000 15 000000 15 000000 20 000000 20 000000 20 000000 20 000000 20 000000 20 000000 20 000000 20 000000 25 000000 25 000000 25 000000 25 000000 30 000000 30 000000 30 000000 30 000000 30 000000 30 000000 30 000000 30 000000 35 000000 35 000000 35 000000 35 000000 40 000000 40 000000 0 00e 000 1 0000000 0 00e 000 0 5000000 1 0000000 0 00e 000 1 0000000 0 00e 000 1 0000000 0 00e 000 0 5000000 1 0000000 0 00e 000 1 0000000 0 00e 000 0 5000000 1 0000000 0 00e 000 1 0000000 0 00e 000 1 0000000 0 00e 000 0 5000000 1 0000000 0 00e 000 1 0000000 0 00e 000 0 5000000 1 0000000 0 00e 000 1 0000000 0 00e 000 1 0000000 0 00e 000 0 5000000 0 5000000 0 5000000 0 00e 000 0 00e 000 0 00e 000 1 0000000 1 0000000 0 00e 000 0 00e 000 1 0000000 1 0000000 1 0000000 0 5000000 0 5000000 0 00e 000 0 00e 000 0 00e 000 1 0000000 1 0000000 0 00e 000 0 00e 000 1 0000000 1 0000000 1 0000000 0 5000000 0 5000000 0 00e 000 0 00e 000 0 00e 000 1 0000000 1 0000000 0 00e 000 0 00e 000 1 0000000 1 0000000 223 224 51 40 000000 1 0000000 1 0000
124. 0e 3 Fric b Speed sig N goes zero 13 2 30e 1 Tensile vol b vert scalar 14 8 00 1 Tensile vol b slope 15 1 00 Tensile vol b horiz yield 16 2 00 2 Unl volumetric coeff 17 1 00 2 Unl volumetric coeff c18 1 000 Tensile vol b unload coeff c19 0 40 Unloading slope interpolator c20 14 00e 2 Residual strength c21 0 990 Unloading slope Int in tens amp CCMA TYPE 4 amp CCM4Params amp CCM4Params Ex Nplanen K1x K2x K3x K4x ESOx VA x FC x TSH x PSI x Vx ETA Dx ETA Nx MY UI x IDEALISATION 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D Table 83 amp CCM4Params sub command parameters Basic properties Ex Elastic modulus Units 17 Acceptable range 0 maximal real number Default value 30 x 10 f f ATENA Input File Format 137 Generation formula E 6000 15 5R R f f this formula is valid only if 15 compressive cube strength given as positive number in MPa MU POISSON NY Poisson s ratio a Units none Acceptable range lt 0 0 5 Default value 0 3 Number of microplanes Units None Acceptable values 21 28 37 61 Default value 28 Microplane parameter Units None Acceptable range lt 0 maximal real number gt Default value 1 65x10 Generation formula k 0 1156 R E Microplane parameter kp Units None Acceptable range lt 0 maximal real number gt Default value 160 Microplane pa
125. 133 134 136 137 140 KSI FATIGUE 106 109 L EIMELT ET ertt 41 42 i LN Bar I DD 35 LENBIS e tenete eode 35 LINE SEARCH ITERATION LIMIT 42 LINE SEARCH WITH ITERATIONS 42 LINE SEARCH WITHOUT ITERATIONS 42 LINEAR25 29 35 61 62 72 75 142 143 144 146 149 151 152 153 154 155 156 157 247 248 LINE SEARCH 35 LIST 18 19 22 58 59 190 193 217 282 284 LOADII 12 13 36 37 40 46 70 143 144 146 148 149 151 152 153 154 155 156 157 173 174 175 176 178 179 180 185 186 187 188 189 190 195 196 197 206 208 214 215 217 218 219 224 226 228 235 237 267 271 272 273 274 277 278 279 280 282 283 284 LOAD DISPLACEMENT RATIO 36 37 40 LOADING DISPLACEMENT BERGAN CON 40 TANT doit eee oT D HR 40 LOCATIONG6 37 41 50 52 189 190 193 217 277 278 282 284 8 143 144 145 146 149 195 M M 7 8 46 47 49 53 75 78 81 85 89 98 104 108 112 119 121 123 124 128 129 130 131 135 138 197 199 201 205 254 MASTER173 174 176 178 185 186 196 275 277 MATERIALI1 13 56 58 59 60 61 71 72 73 74 91 100 123 124 125 142 158 159 160 162 163 164 167 168 171 172 184 190 197 198 202 203 210 211 221 222 228 255 256 268 276 277 279 281 282 MATERIALDOS L i rnieY e NS 56
126. 151 152 153 154 155 156 EIL e tune tete 189 193 229 230 FIXEDSI 52 78 81 85 89 98 105 108 112 118 179 180 188 189 217 218 219 c6 198 199 201 FRICTION eee eee 50 51 125 126 FROMIS 19 20 21 22 41 58 59 190 192 193 204 217 230 251 252 253 FT76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 98 99 100 105 106 107 108 110 111 112 113 114 115 116 117 125 126 FULE NR ehh aia 35 FUNCTIONI3 50 51 52 90 92 94 95 96 97 99 101 103 104 125 126 127 128 129 130 131 132 133 136 139 140 158 159 160 162 163 173 174 176 178 179 185 226 228 229 258 271 272 273 276 277 GAMMA COEFF eee 61 62 GAMMA REF eee 61 62 GEOMETRY11 13 49 50 51 53 56 58 59 61 179 190 202 204 211 222 228 257 258 260 270 276 277 282 GF76 77 79 80 83 84 86 87 90 99 106 107 110 111 114 115 116 117 287 GIBBS POOLE 5 5 ere rr ots 42 GLOBAL 50 179 180 190 196 271 272 277 GROUPIS 20 21 22 46 56 60 61 69 70 179 180 185 190 193 213 214 224 228 240 241 246 248 249 250 251 252 253 271 272 276 277 282 GROUPS 46 176 H HARDENING 2 ette 119 120 HISTORY11 13 14 144 146 148 149 151 152 154 155 179 180 204 270 HUMIDITY 140 142 143 144 145 146 148 149 150 151 152 153
127. 180 amp ELEMENT INITIAL STRAIN LOAD INITIAL STRAIN amp LOADED ELEMS amp LOAD COEF IP ip id X Y Z XY YX YZ ZY XZ ZX VALUE x element initial strain amp ELEMENT INITIAL STRESS LOAD INITIAL STRESS amp LOADED ELEMS amp LOAD COEF IP ip id X Y Z XY YX YZ ZY XZ ZX VALUE x element initial stress y amp PRESTRESSING PRESTRESSING amp LOADED ELEMS amp LOAD COEF VALUE START NODE END NODE START AND END NODE prestres val amp FIXED PRESTRESSING FIXED PRESTRESSING amp LOADED ELEMS amp LOAD COEF DIRECTION START TO END END TO START VALUE VALUES 5 coord value at s VALUE amp FIXED PRESTRAINING amp LOADED ELEMS amp LOAD COEF DIRECTION START TO END END TO START VALUE VALUES 5 coord value at s VALUE FNCi amp MASS ACCELERATIONS ELEMENT LOAD MASS ACCELERATIONS amp LOADED ELEMS amp LOAD COEF LOCAL GLOBAL X Y Z DOF idof VALUE x amp ELEMENT INITIAL GAP LOAD INITIAL GAP amp LOADED ELEMS INIT STEP ID n amp CARBONATION CARBONATION WATER MASS x CEMENT MASS SCM MASS x CONCRETE COVER x CO2 x CO2x RHx NODES nodes loaded nodes TYPE STRING str MERGE MERGE STRING str 11 NO ELEM OUTPUT amp CHLORIDES CHLORIDES D REF x TIME D REF COEFF x TIME M COEFF x CONCRETE COVER x CS x CL CRIT x NODES
128. 205 HUMIDITY ABS MAX ER ROR err HUMIDITY REL MAX ERR OR err2 TEMPERATURE ABS MAX ERROR e773 Relative and absolute humidity and temperature errors that are considered as negligible The values are used during mapping of moisture and humidity histories at structural material points If the tested and master values differ less than as it is required by these maximum errors than no new history is created and the tested material point is mapped towards the master material TEMPERATURE REL MAX point By default these errors are set to 0 1 ERROR err4 TIME UNITS time units The TIME UNITS time units allows to specify which time units were used to calculate and write the transpored analysis results in the file results file name It is specified in the same way as in the Unit command By default no time unit conversion is made 4 8 Dynamic Analysis Related Commands Dynamic analysis of structures has been developed in an engineering module CCStructuresDynamic Hence M CCStructuresDynamic switch must be specified on the ATENA command line in order to invoke the correct execution module The included eigenvalues and eigenvectors analysis is available in any engineering module derived for CCStructures 1 e CCStructures CCStructuresCreep and CCStructuresDynamic In general the module CCStructuresDynamic is similarly to CCStructuresCreep an extension of the module CCStructures from which it inherits many commo
129. 861556 0 0 node 46 vel 0 0030 0 0 accel 0 005370861556 0 0 node 47 vel 0 0030 0 0 accel 0 005370861556 0 0 node 48 vel 0 0030 0 0 accel 0 005370861556 0 0 node 37 vel 0 0030 0 0 accel 0 005370861556 0 0 node 38 vel 0 0030 0 0 accel 0 005370861556 0 0 node 39 vel 0 0030 0 0 accel 0 005370861556 0 0 node 40 vel 0 0030 0 0 accel 0 005370861556 0 0 node 41 vel 0 0030 0 0 accel 0 005370861556 0 0 node 42 vel 0 0030 0 0 accel 0 005370861556 0 0 node 43 vel 0 0030 0 0 accel 0 005370861556 0 0 node 44 vel 0 0030 0 0 accel 0 005370861556 0 0 node 1000007 vel 0 0030 0 0 accel 0 005370861556 0 0 node 1000008 vel 0 0030 0 0 accel 0 005370861556 0 0 l Options and switches l Parameters Solution Parameters SET Static SET Newton Raphson SET Iteration Limit 20 SET Displacement Error 0 010 SET Residual Error 0 010 SET Absolute Residual Error 0 010 SET Energy Error 0 010 SET STOP_TIME 3 5 LAST_TIME 3 5 SET TRANSIENT TIME CURRENT 0 INCREMENT 0 1 ATENA Input File Format 217 SET TRANSIENT HUGHES BETA 0 2505 GAMMA 0 5 ALPHA 0 05 DAMPING MASS COEFFICIENT 1 789 STIFFNESS COEFFICIENT 0 SET TRANSIENT HUGHES 0 2505 GAMMA 0 5 ALPHA 0 05 DAMPING MASS COEFFICIENT 0 STIFFNESS COEFFICIENT 0 1396 SET HUGHE
130. 89 33893 35497 MU 02 0 2 0 2 0 2 0 2 0 2 FC 20 30 40 50 60 70 1 917 2 446 2 906 3 323 3 707 4 066 FT MULT 1 043 1 227 1 376 1 505 1 619 1 722 EXC 0 5281 0 5232 0 5198 0 5172 0 5151 0 5133 FCO 4 32 9 16 15 62 23 63 33 14 44 11 114 EPS_VP 4 92 10 6 54 10 8 00 10 9 3510 1 06 10 1 18 10 SOFT T 1 33 10 2 00 10 2 67 10 3 3310 4 00 10 4 67 10 7 342177 5 436344 4 371435 3 971437 3 674375 3 43856 8 032485 6 563421 5 73549 5 430334 5 202794 5 021407 3 726514 3 25626 3 055953 2 903173 2 797059 2 719067 ORDER 3 3 3 3 3 3 GF 4 87 107 6 47 107 7 92 10 9 26 107 1 05 10 1 17 107 FC 80 90 100 110 120 E 36948 38277 39506 40652 41727 MU 0 2 0 2 0 2 0 2 0 2 FC 80 90 100 110 120 FT 4 405 4 728 5 036 5 333 5 618 FT MULT 1 816 1 904 1 986 2 063 2 136 EXC 0 5117 0 5104 0 5092 0 5081 0 5071 FCO 56 50 70 30 85 48 102 01 114 00 EPS VP 1 30 107 1 41 10 1 52 10 1 62 107 1 73 10 SOFT_T 5 33 10 6 00 10 6 67 10 7340 8 00 10 A 3 245006 3 082129 2 942391 2 820644 2 713227 B 4 871993 4 745867 4 637358 4 542587 4458782 2 659098 2 611426 2 572571 2 540158 2 512681 ORDER 3 3 3 3 3 GF 1 29107 1 40 10 1 50 10 1 61107 1 713107 4 3 2 9 Sub command amp SBETAMATERIAL amp SBETAMATERIAL TYPE CCSBETAMaterial E MU POISSON NY FT RT F T R T FC RC F C R
131. 9 0 0 COEFF Z 0 0 0 1 GENERATE VEL CONST 0 005370861556 0 0 COEFF X 0 0 0 COEFF Y 0 0 1 0 COEFF Z 0 0 0 GENERATE ACCBEL 4 8 3 CCStructuresDynamic Set parameters The standard SET parameters specified via the amp ANALYSIS TYPE subcommand amp TRANSIENT are dynamic analysis extended For more details see the enhanced version of the subcommand i e amp TRANSIENT Table 139 amp ANALYSIS TYPE sub command parameters Parameter Description amp TRANSIENT Set transient analysis and set some parameters for it Syntax amp TRANSIENT TRANSIENT TIME CURRENT x TIME INCREMENT x STOP TIME execution stop time LAST TIME ast time NEWMARK METHOD HUGHES ALPHA METHOD NEWMARK BETA NEWMARK GAMMA HUGHES ALPHA DAMPING STIFFNESS COEFFICIENT x DAMPING MASS COEFFICIENT x Table 140 ANALYSIS TYPE subcommands for the transport analysis TIME CURRENT x TIME INCREMENT x STOP TIME Time at which the execution should stop execution stop time LAST TIME last time _ Set the final time of the analysis NEWMARK METHOD Dynamic analysis method to be used HUGHES ALPHA ME THOD NEWMARK BETA Defines the Newmark s parameter the Newmark s NEWMARK GAMMA parameter and the Hughes damping parameter By default x HUGHES ALPHA x these parameters are 0 35 0 6 and 0 05 respectively DAMPING STIFFNESS Defines stiffness matrix coefficient for proportional damping
132. 94 OPTIMIZE 25 42 OUTPUTI1 13 14 179 180 189 190 193 194 195 196 197 198 200 202 203 217 239 274 277 278 282 284 P PASTERNAK icerir iaeiei 53 PATCH oak 237 238 5 2 51 52 PLANE 75 76 79 82 83 86 87 91 99 105 106 109 110 113 119 121 123 124 133 135 136 139 PLANE STRESS75 76 79 82 83 86 87 91 99 105 106 109 110 113 119 121 123 124 133 135 136 139 PEAST CO tete 198 199 201 POINTS 44 45 190 193 277 POISSONTS 76 77 79 83 86 87 90 91 99 100 106 114 115 119 120 121 122 123 124 134 137 POLAR esc teeth orit tiere 53 54 2 72 73 119 121 122 PRESTRESSING sese 179 180 70 71 206 235 236 267 268 Q CTT erie srr 140 OD d 141 C76 79 80 81 83 84 86 87 88 90 92 99 100 106 107 108 110 111 114 115 C079 81 83 84 86 88 90 99 106 108 110 111 T76 77 79 80 83 86 87 90 91 99 100 106 107 110 114 115 125 RATIO 36 37 40 130 131 158 255 257 281 RC38 39 76 77 79 80 83 86 87 90 92 99 100 106 107 110 114 115 079 81 83 84 86 88 90 99 106 108 110 111 REFERENCE DLAMBDA 38 REFERENCE 41 268 269 280 REFERENCE NUMBER OF IT
133. ATENA Input File Format 235 default this command is not needed as the analysis is calculated automatically at the end of execution of each load step 4 9 10 Static initial values of state variables The initial structural state variables at finite nodes are set in a similar way to their specification within CCStructuresTransport module At the moment this approach can be used to set only nodal reference temperature in the structure but it is expected to extend in the future The nodal initial conditions can be set by the input command amp STATIC INITIAL CONDITIONS Syntax amp STATIC INITIAL CONDITIONS NODAL TEMPERATURE SETTINGS amp STATIC MANUAL INITIAL VALUES ENTRY amp STATIC GENERATED INITIAL VALUES j amp STATIC MANUAL INITIAL VALUES ENTRY BASE TEMPERATURE base femp NODE n TEMPERATURE temp Table 151 Static Nodal Initial Conditions Definition manual entries duod NODE n Set initial conditions for node TEMPERATURE base temp Specify initial nodal temperature for node n This value is added to the base temperature below Units T Default 0 BASE TEMPERATURE Initial base temperature This value is used for all nodes of the nodal temp structure Units T Default 0 amp STATIC GENERATED INITIAL VALUES NODAL SETTING SELECTION se ection name CONST const COEFF X coeff x COEFF Y coeff y COEFF Z coeff GENERATE TEMP j 236 Table 152 Static Nodal Initial C
134. ATENA and you need to edit that model The model has been serialized The procedure of editing the model would be as follows 1 Restore the original model 2 Go back to T3D 3 Using OUTPUT commands suppress output from T3D to ATENA of all entities that didn t change 4 Re define the edited entities 3 Re generate the whole model and output all the changes into ATENA Syntax OUTPUT YES NO Vertex CURVE REGION entity id 4 10 1 7 The subcommand SLAVE The subcommand SLAVE allows connecting of two overlapping surfaces or neighboring curves and nodes Its use is rather simple define the first entity of the pair in a usual way Define the second entity of the pair and include the keyword SLAVE in its definition Note that SLAVE is applied only for internal joints therefore SLAVE must be specified also for all boundary entities and their subentities up to level of boundary vertices It behaves in exactly the same way as ELEMPRO and NODEPROP keywords Example curve 100 vertex 101 104 slave Only vertices with nearly the same coordinates get connected The same property is judged based on 1 octree mesh size Octree is a special technique by which the 3D space around 240 the model is subdivided into brick shaped regions in order to facilitate faster searching methods It works for both structured and unstructured meshes An error message is produced and the generation is terminated if for a SLAV
135. Acceptable range lt 0 maximal real number Recommended value From table below Critical compressive displacement Strain localization is not used in this model and this value is fixed to 1 0 Units none 112 Miscellaneous properties EXC x ALPHA x FIXED x FT MULT x Acceptable range 0 maximal real number Recommended value 1 0 Eccentricity e defining the shape of the failure surface Units none Acceptable range 0 5 1 07 Recommended value From table below Plastic potential function parameters Units none Acceptable range any real number Recommended value From table below Polynomial order n of the plastic potential function Units none Recommended value 3 Material density Units M P Acceptable range 0 maximal real number Default value 0 0023 f f Coefficient of thermal expansion Units 1 T Acceptable range 0 maximal real number Default value 0 000012 Fixed smeared crack model will be used Units none Acceptable range 0 17 Default value 0 Multiplier 24 for tensile strength in the plastic part of the fracture plastic model in order to ensure that plastic surface and fracture surface intersect each other Units none Acceptable range lt 0 gt Recommended value From table below ATENA Input File Format SHEAR FACTO UNLOADING x IDEALISATION Rx DAMPING MASS DAMPING STIFF xx Recommended values table 113 Shear factor
136. C data This type of macroelement is used when a group of elements are repeated in the FE model In this case it is necessary to input or generate only the first occurrence of the elements These elements are then assigned an element property so that they can be referred to during creating ATENA Input File Format 249 their copies The CCCoppyElementSelection macroelement takes responsibility for the process copying of the master finite elements CCCopyElementSelection macroelement can be used for element extrusion mirroring rotating etc The transformation of copied elements is defined by principal SOURCE NODES id 4 i e the macroelement s specific input data and destination THROUGH NODES mnode id i e the macroelement s common input data Syntax SOURCE NODES id 3 id 4 SOURCE ELEMPROP elemprop SOURCE GROUP id SOURCE NODEPROP nodeprop ACCOMPLISH count TIMES Table 158 MACRO ELEM DATA SPEC for CCCopyElementSelection macro element parameters Parameter Description SOURCE NODES id Defines ids of source macronodes whose coordinates should be id 4 transformed into destination coordinates of nodes THROUGH NODES mnode id Note that this input data only defines transformation of the model and no actual macronodes will be copied 2D resp 3D problem needs 3 resp 4 of such nodal source destination nodal pairs SOURCE ELEMPROP All elements defined in the selection
137. COORD s T COORD For n bars specify its material id area and position via s t coordinates Isoparametric coordinates are used otherwise the scaling factors are applied The factors are those used for scaling solid heights and widths DETECT AXIS Detect axis of beam elements and reorder element s DETECT AXIS VECTO incidences If DETECT AXIS VECTOR is not specified R x1 x2x3 the axial direction is chosen to comply with the biggest dimension of the element Otherwise it is chosen to have the smallest angle with the given vector x x2 x3 ATENA Input File Format 59 DETECT HEIGHT Detect height of beam elements and reorder element s DETECT HEIGHT VEC incidences If DETECT HEIGHT VECTOR is not TOR x2 x3 specified direction of the beam s height is chosen to comply with the bigger dimension of the element s cross section Otherwise it is chosen to have the smallest angle with the given vector x1 x2 x3 NUMBER OF IPS IN R Number of integration points in beam s longitudinal axis By n default 2 IPs are used however especially in case of heavy material nonlinearity more IPs may yield more accurate results as the beam can better locate a material failure Max value is 6 REDUCE TAU XY Reduce shears by the factor 0 85 REDUCE TAU XZ FULL TAU amp BEAM ID GEOMETRY SPEC 1 CS WIDTH eqn expression CS HEIGHT EQN eqn expression VT X EQN eqn expression VT Y EQN eqn expres
138. CStructures The CCStructuresCreep DLL is needed for creep analysis O specifies overwrite flag for output file message file and error file files This means that during execution or re execution within AtenaWin the files are created or overwritten By default the files are appended i e output of the new analysis is added at the end of the files input file name of a file with Atena input commands If not specified standard input from keyboard is assumed output file name of a file for Atena output If output file doesn t exits it is created Otherwise it is appended If output file is not specified in the command line then standard output to the screen is assumed message file name of a file for Atena message output The message file contains compact information on Atena execution as for instance a log of the execution start and end convergence performances severe warning and error messages during execution etc If message file doesn t exits it is created Otherwise it is appended If message file is not specified in the command line then standard output to the screen is assumed error file name of a file for Atena error output The error file contains full information on Atena execution as for instance a log of the execution start and end convergence performances all warning and error messages during execution incl their place of invocation etc If error file doesn t exits it is created Otherwise it is a
139. D LOAD CASES MATERIAL MATERIALS GEOMETRY GEOMETRIES ELEMENT TYPE ELEMENT TYPES There are available several new or renamed output data see the Table 124 amp CREEP ANALYSIS PARAMS commands Creep and shrinkage analysis is a new analysis type not supported in the previous versions Therefore all related commands are new Please refer to the appropriate section of this manual for more details Note that some more creep commands are available in amp CREEP MATERIAL amp RETARDATION TIMES amp HISTORY IMPORT and analysis step definition amp CREEP STEP DEFINITION amp PREPROCESS commands The preprocess commands can be used to easy FE model mesh generation by use of the T3D generator and for generation of embedded reinforcement bars Boundary conditions i e specification of concentrated loads and supports can now be defined via amp SELECTION and modified amp LOAD PLACE and amp LOAD VALUE commands List of loaded supported nodes also can be automatically generated by T3D generator using ELEMPROP ist and NODEPROP Jistname subcommands of T3D commands REGION VERTEX SURFACE etc amp CCStructuresTransport commands i e commands for analysis of moisture and humidity transport within structures Although most input commands for temperature and humidity transport are the same as those for the other engineering modules there are some exceptions This section is devoted to the commands that are available only fo
140. DEGREE VOLUME POW x LAMBDAO x Table 85 amp CCM4RCParams sub command parameters Parameter Description TIMEO x Initial time Units Days Default value 28 days TEMPERATURE Material initial temperature Units C Default value 25 C HUMIDITY Material initial humidity Default value 0 94 TAUI x Te smallest relaxation time Units days Default value 1 E 6 days NUMBER MAXWELL Number of Maxwell or Kelvin units Default value 14 Ql x Creep parameter Q1 refer to Bazant amp Baweja Model B3 If negative the parameter is estimated according to the above mentioned creep model Units MPa Default value 1 ATENA Input File Format 141 Creep parameter Q2 refer to Bazant amp Baweja Model B3 If negative the parameter is estimated according to the above mentioned creep model Units a Default value 1 Creep parameter Q3 refer to Bazant amp Baweja Model B3 If negative the parameter is estimated according to the above mentioned creep model Units Pa Default value 1 Creep parameter Q4 refer to Bazant amp Baweja Model B3 If negative the parameter is estimated according to the above mentioned creep model Units Pa Default value 1 Water cement ratio Units None Default value 0 4 Cement content kg Units a m Default value 100 Ag m Aggregate cement ratio Units None Default value 7 Proportionality constant between viscosity and microprestress
141. DELETE FUNCTION 10 Apply 1 load steps STEP ID 31 STATIC NAME Step 1 LOAD CASE Gale 520 62 1 0 63 1 0 EXECUTE OUTPUT LOCATION GLOBAL DATA ALL OUTPUT LOCATION ELEMENT INTERNAL POINTS group from 1000 to 1000 element from 10 to 20 ip from 1 to 4 278 group from 2000 to 2000 element from 10 to 20 ip from 1 tO 3 DATA ALL OUTPUT LOCATION ELEMENT NODES DATA ALL OUTPUT LOCATION ELEMENT DATA ALL OUTPUT LOCATION NODAL DATA ALL OUTPUT LOCATION LOAD CASE DATA ALL end of file 5 2 Input file for a sample transport analysis Testing input data format LHS and RHS boundary conditions their values and sign for 3D version see transp2 bricks test inp Structure 2D structure of vertical quadrilaterals Total dimension width thickness height 0 15 10 1 Discretisation 4 elements per height one ter width Location left bottom node x y 0 0 top right node x y 0 15 1 Loading per step vertical flux of heat to the bottom Initial condition dT dy 20 1 20 dT dx 0 dh irrelevant h fixed everywhere Flux TEMP TEMP dT dy 103680 20 2073600 External forces sum Q qy width thick 2073600 0 15 10 3110400 Individual force Q sum Q 2 3110400 2 1555200 Sign of internal and external forces Internal forces positive value corresponds to the flow in direction of outwards normal to the boundary surface External load positive value corresponds to
142. DY MASTER ID SLAVE_SELECTION list_of slaves FIX DOFS dofs mask Table 115 RIGID BODY description The RIGID BODY command structure is a special case of amp COMPLEX LOAD DISPLACEMENT when each slave node defined in the selection list of slaves should be fixed with respect to the master node n so that the couple nodes behaves like a rigid frame in the structure Only dofs specified in dofs mask are affected The mask is coded as a bitwise number with 1 for fixed dofs and 0 for skipped dofs A dof 1 is the most right bit a dof 2 is the next bit to the left etc As an example if you want to fix dislacement x displacement y and rotation x you need to set the mask as decimal number 11 Decimal 11 is binary 1011 amp INVERSE RIGID BODY INVERSE RIGID BODY SLAVE ID n MASTER SELECTION list_of masters FIX DOFS dofs mask MASTER WEIGHTS w1 w2 Table 116 INVERSE RIGID BODY description The INVERSE RIGID BODY command structure is opposite to RIGID BODY command While RIGID BODY specifies that each DOF in the mask of each slave from list of slaves is to be fixed by master node master id here each DOF of slave node should be fixed by DOFs of master nodes defined in ist of masters i e only number of DOFS constraint equations are generated irrespective of number of masters Weighted average of master nodes DOFs is used as specified in master weights Number of masters weight factors is ecpected to be entered amp BEAM NL CONNECTIO
143. E SORT Y X SELECTION border nodes CONNECT next border nodes Generate selection and monitor at IP SELECTION IP NEAREST 985001 GENERATE IPS NEAREST MACRO NODES 985001 group from 105 group id to 302 EXECUTE OUTPUT LOCATION OUTPUT DATA DATA LIST SELECTION IDS IP NEAREST 985001 END OUTPUT NAME Monitorl DISPLACEMENTS 100000 MONITOR 2 LOCATION ELEMENT IPS MULTI SELECTION AT IP NEAREST 985001 DATA LIST DISPLACEMENTS AT IPS ITEM AT 1 Generate selection and monitor at NODE SELECTION NODE NEAREST 985001 GENERATE NODE NEAREST MACRO NODES 985001 EXECUTE OUTPUT LOCATION OUTPUT DATA DATA LIST SELECTION IDS NODE NEAREST 985001 END OUTPUT NAME Monitorl DISPLACEMENTS 100000 MONITOR 2 LOCATION NODES NODE AT SELECTION NODE NEAREST 985001 DATA LIST DISPLACEMENTS ITEM AT 1 End ATENA Input File Format 23 SELECTION ENODE NEAREST 214 GENERATE ENODE NEAREST MACRO NODES 214 group from 108 group to 302 EXECUTE OUTPUT LOCATION OUTPUT DATA DATA LIST SELECTION IDS ENODE NEAREST 214 END SELECTION GNODE NEAREST 214 GENERATE GNODE NEAREST MACRO NODES 214 group from 108 group to 302 EXECUTE OUTPUT LOCATION OUTPUT DATA DATA LIST SELECTION IDS GNODE NEAREST 214 END ATENA Input File Format 25 4 THE COMMAND amp SET Syntax amp SET SET amp ANALYSIS TYPE amp LINEAR SOLVER TYPE amp CONVERGENCE CRITERIA amp SOLUTION METHOD amp PREDICTOR TYPE amp UPDATE DISPLS
144. E node no master node is found 4 10 2 The command T3D EXPAND SELECTIONS The command is used to compile regular and expanded selection lists with finite elements and nodes for a particular geometrical entity by T3D generator These lists are used to connect a geometrical T3D model with an associated T3D generated finite element model The regular selection lists includes only nodes or elements within the entity and outside its boundary They are created automatically during the mesh generation by T3D and they are using an actual setting of amp T3D EXPAND SETTINGS during the generation The expanded selection lists are regular selection lists expanded by adding nodes and elements on boundaries of the appropriate entity They are created by commands amp T3D EXPAND SETTINGS after the T3D mesh generation i e in time when the regular lists are available Syntax amp T3D EXPAND T3D EXPAND SELECTIONS amp T3D EXPAND SETTINGS amp T3D EXPAND ENTITY 1 amp T3D EXPAND SETTINGS PROP GENERATION NONE SEMIATOMATIC AUTOMATIC EXPAND SUFFIX expand str GROUP SUFFIX group str DEF VERTEX FMT FOR NODES vertex fint DEF MNODE FMT FOR NODES mnode fmt DEF CURVE FMT FOR NODES curve fmt DEF PATCH FMT FOR NODES patch fint DEF SURFACE FMT FOR NODES surface fmt DEF SHELL FMT FOR NODES shell fint DEF REGION FMT FOR NODES region fmt DEF MELEMENT FMT FOR NODES melement fm
145. EA val TEMPERATURE K TEMP TEMP TEMP K K TEMP Ky TEMP GRAV K7 C TEMP C C TEMP TEMP C TEMP W C C H T C TEMP TEMP ID ff TEMP TEMP TEMP ID f TEMP W TEMP ID fg 1 IK TEMP GRAV TEMP ID f C TEMP TEMP ID f C TEMP TEMP TEMP ID f C TEMP W TEMP ID f C TEMP T TEMP ID f TEMP ID fg K TEMP TEMP FNC ID fg TEMP W ID f TEMP GRAV ID dec ATENA Input File Format 257 C TEMP FNC ID f C TEMP TEMP FNC ID ft C TEMP W ID f C TEMP T FNC H ID f K TEMP T ID K TEMP TEMP T ID fi TEMP W T ID f TEMP GRAV T ID f C TEMP T ID f C TEMP TEMP T ID fi C TEMP W FNC T ID f C TEMP T FNC T ID f 1 WATER D_H_H Dj D TEMP D D W Dj D H GRAV Dya LH H C H TEMP CH W C C H T D H H FNC H ID 5 D TEMP ID D H W FNC ID f D H GRAV ID f 1 C H H FNC ID f C TEMP ID f W FNC H ID f C H T FNC H ID f D TEMP ID f D TEMP TEMP ID 1 D TEMP ID f D GRAV TEMP ID f C H TEMP
146. ED type is assumed E g LOAD CASE FIXED 5 2 0 8 INCRENENT 3 13 4 10 8 amp DYNAMIC STEP DEFINITION TYPE DYNAMIC NAME step ID n AT time FIXED INCREMENT LOAD CASE n x ATENA Input File Format 189 Table 122 amp DYNAMIC_STEP_DEFINITION command parameters Parameter Description TYPE DYNAMIC Dynamic analysis related load step As dynamic analysis involve numerical time integration the dynamic step consists typically of several static like integration steps one for each sample time It starts at time of the current step and stops at min step time of the next dynamic step execution stop time It behaves similarly to creep analysis however dynamic analysis uses equal size sub step time lenghts NAME step name Step name in quotes that is going to be defined Integral identification of the step step name AT time Time at the beginning of the current dynamic step in days If the step s id is defined in form of an interval the value of time is incremente based on current time increment dt LOAD CASE Linear combination of load cases for step step name FIXED INCREMENT which are to be used in this step The FIXED type of load is lm t xh evenly distributed into all applied integration time sub steps of the current dynamic step whilst the INCREMENT type is used only in the 1 integration sub step In the remaining sub steps they are applie
147. EMENT type BCs are typically input within increment loads of the stepd definition amp COMPLEX LOAD DISPLACEMENT COMPLEX amp MASTER NODES amp SLAVE NODES amp LOAD VALUE RELAX PROCESS FLAG REFERENCE COORDS USE CURRENT COORDS COPY DEFORMATION COPY DEFORMATION ONCE COPY NO DEFORMATION Table 106 COMPLEX LOAD DISPLACEMENT description This type of Dirichlet boundary condition sets the following general boundary condition N where i j j l In the above equation represents all slave degrees of freedom defined in amp SLAVE NODES x is the prescribed value defined in amp LOAD VALUE u are the master degrees of freedom and f are multipliers for the master degrees of freedom defined ATENA Input File Format 175 in amp MASTER NODES The index iat the slave degree of freedom denotes the possibility to enforce the above boundary condition for several slave nodes and their degrees of freedom The boundary condition has two forms basic and relaxed The relaxed form differs from the basic one in the way that during iteration process it transfers out of balance forces directly to reactions This strategy is needed if the specified boundary condition needs to be applied in form of extra Lagrangian multiplier which in turn means that it may need an external force to realize the prescribed constrain In other words use the relaxed form of the boundary condition for cases when
148. EMENT 2 0 54 STEP id 35 TYPE DYNAMIC name Load No INCREMENT 2 0 427057074E 3 step id 1 execute step id 2 execute step id 3 execute step id 4 execute step id 5 execute step id 6 execute step id 7 execute step id 8 execute step id 9 execute step id 10 execute step id 11 execute step id 12 execute step id 13 execute step id 14 execute step id 15 execute step id 16 execute step id 17 execute step id 18 execute step id 19 execute step id 20 execute 01199139E 2 7508473E 3 9188300E 3 7460782E 3 3757294E 3 9696096E 3 28 AT 29 AT 30 AT 31 AT 32 AT 33 AT 34 AT 35 AT 2 2 8 2 9 3 0 3 1 3 2 3 3 3 4 LOAD CASE FIXED LOAD CASE FIXED LOAD CASE FIXED LOAD CASE FIXED LOAD CASE FIXED LOAD CASE FIXED LOAD CASE FIXED LOAD CASE FIXED 219 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 220 step id 21 execute step id 22 execute step id 23 execute step id 24 execute step id 25 execute step id 26 execute step id 27 execute step id 28 execute step id 29 execute step id 30 execute step id 31 execute step id 32 execute step id 33 execute step id 34 execute step id 35 execute end of file 4 8 9 Sample input data for eigenvalues and eigenvectors analysis The following as an example of input data for eigenvalue analysis of the structure from the previous section Eigenvalue analys
149. ENA Input File Format SHEAR FACTOR x UNLOADING x BETA FATIGUE x KSI FATIGUE x IDEALISATION 109 Units none Acceptable range 0 gt Default value 2 1 Shear factor that is used for the calculation of cracking shear stiffness It is calculated as a multiple of the corresponding minimal normal crack stiffness that is based on the tensile softening law Units none Acceptable range lt 0 gt Default value 20 Unloading factor which controls crack closure stiffness Acceptable range 0 17 0 unloading to origin default 1 unloading direction parallel to the initial elastic stiffness Exponent for fatigue calculation Units none Acceptable range 0 gt Default value 0 06 Factor for fatigue damage calculation based on crack opening and closing ACOD Units none Acceptable range 0 17 Default value 0 0001 Defines the idealisation if material model with higher dimension is to be used in a finite element with lower dimension For instance in case a 3D model is to be used in 2D configuration Units none Acceptable range 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D Default value program tries to determine a suitable idealisation based on the dimension of the material model and the dimension of the finite element where it is used So in most cases it is not needed to use this command In certain cases however the program cannot determine correctly the idealisation to use
150. ERATIONS p 39 40 REG TON eng n qe ode E R 11 REINFORCEMENT I3 56 58 59 72 73 127 128 130 131 195 203 245 251 257 RELATIVE tud 30 33 269 REDA X 174 REMOVE 18 20 22 41 189 193 238 RESIDUAL 30 33 34 200 201 269 270 RESTORE 13 14 230 RETARD TIMES PER DECADE 44 45 204 RETENTION 114 118 RHO75 76 78 79 81 83 85 87 89 90 99 106 108 114 119 121 123 124 128 129 130 131 135 138 76 77 79 80 83 86 87 90 91 99 100 106 107 110 114 115 125 204 270 5 SAMPLE TIMES PER DECADE 44 45 SBE TAN soam 197 199 200 SECANT PREDICTOR 35 36 SERIALIZE ise 25 43 44 45 46 SET13 14 18 19 25 26 28 34 36 195 207 208 210 216 217 225 268 269 277 280 290 SHAPE142 143 144 145 151 152 155 156 157 176 247 248 SHEARS3 54 76 78 79 82 83 85 87 89 90 96 97 98 99 101 105 106 109 110 113 114 118 53 54 SHEAR 53 54 S er pace NE VIR EURO 75 SHRINKAGE143 144 146 148 149 151 152 153 154 155 156 157 195 SIMPLE173 174 175 176 214 215 225 277 279 280 282 283 284 SLAVE173 174 176 178 185 186 196 239 240 275 277 SLOAN etaed et 42 SMEARED 72 73 127 130 131 SOLVER
151. ES PER DECADE zdecl retard 4 7 2 Thecommand amp HISTORY IMPORT The command forces ATENA to import data about humidity and temperature history at structural nodes that were before hand computed by CCStructuresTransport ATENA s execution module Syntax amp HISTORY IMPORT HISTORY IMPORT GEOMETRY geometry filename RESULTS results filename NUMBER OF INTERVALS FOR HUMIDITY num int hum TEMPERATURE int temp HUMIDITY ABS MAX ERROR err HUMIDITY REL MAX ERROR err2 TEMPERATURE ABS MAX ERROR e773 TEMPERATURE REL MAX ERROR err4 TIME UNITS units Table 136 amp HISTORY IMPORT command parameters Parameter Description results filename Name of binary file with the history It must be the same as that specified for HISTORY EXPORT command in the CCStructuresTransport module It should be enclosed in double quote character geometry filename Name of binary file with geometry of the imported model It must be the same as that specified for HISTORY EXPORT command in the CCStructuresTransport module It should be enclosed in double quote character 4 If omitted identical imported and current models are assumed num int hum Number of intervals into which nodal humidities at each time step should be sorted By default num int hum 1 num int temp Number of intervals into which nodal temperatures at each time step should be sorted By default num int temp 1 ATENA Input File Format
152. End of File ATENA Input File Format 285 6 ATENA INPUT FILE KEYWORDS ARC LENGTH AND LINE SEARCH 35 50 51 53 58 59 60 1D72 75 76 79 82 83 86 87 91 99 105 106 109 110 113 119 121 123 124 133 135 136 139 3DNONLINCEMENTITIOUS2FATIGUE 106 A A 27 28 32 33 74 110 112 114 118 133 196 207 220 ABSOLUTE sacs 2 mene 29 33 269 AC140 141 142 143 144 145 151 152 153 155 156 157 AIR 143 144 145 151 152 153 155 156 157 ALL 43 44 45 190 193 238 277 278 279 ALPHATS 76 78 79 81 83 85 87 89 90 99 106 108 114 119 121 122 123 124 128 129 130 131 132 135 138 ALPHA DP ieecoos ost 121 122 35 43 44 45 46 180 187 EEA eue ro E eet 51 62 ARC LENGTH 39 ARC LENGTH PREVIOUS STEP LENGTH Em 38 ARC LENGTH RESET STEP LENGTH 38 ARC LENGTH VARIABLE CONSERVATIV 1 2 39 ARC LENGTH VARIABLE CONSERVATIV EIAS 39 ARC LENGTH VARIABLE PROGRESSIVE 39 40 ARC LENG TH is iicet s 35 18 19 41 58 59 188 189 190 197 217 218 219 251 252 253 ATTRIBUTE 11 190 193 AXISYMMETRICIS 75 76 79 82 83 86 87 91 99 105 106 109 110 113 119 121 123 124 133 135 136 139 B B 110 112 114 118 251 donde tt 42 133 135
153. GE Measured at current humidity shrinkage measured val for measured val previously specified load and current time Unit of shrinkage is dimension less amp CCModelBP2 DATA CCModelBP2 CONCRETE concrete type THICKNESS thick FCYL28 28 HUMIDITY humidity AC ac WC 65 gs SC se SA sa SHAPE FACTOR sf STEAM WATER AIR CURING END OF CURING TIME time LOAD CURRENT TIME xx SHRINKAGE measured val Table 95 amp CCModelBP2 sub command parameters Parameter Description CONCRETE Type of concrete Only type 1 and 3 are supported Default value 1 THICKNESS thick Ratio volume m surface area m of cross section For long elements it is approximately cross sectional area m perimeter m Default value 0 0767 m FCYL28 fcyl28 Cylindrical material strength in compression kPa ATENA Input File Format 157 Default value 35100 kPa HUMIDITY humidity Ambient relative humidity 0 3 1 Default value 0 780 Total aggregate cement ratio Default value 7 04 Default value 0 63 Default value 1 3 Default value 1 8 Default value 0 4 SHAPE FACTOR sf Cross section shape factor It should be 1 1 15 1 25 1 3 1 55 for slab cylinder square prism sphere cube respectively Default value 1 25 STEAM WATER Curing conditions either under in water or air under normal AIR CURING temperature conditions WATER AIR or steam conditi
154. INPUT amp LOAD amp LOCAL amp MESSAGE amp ERROR amp OUTPUT amp RESTORE amp SET amp STEP amp STORE amp UNITS amp T3D SPEC amp DLL NAME amp EMPTY amp RETARDATION TIMES amp HISTORY IMPORT amp PREPROCESS amp TERMINATE amp BREAK amp NODAL IMPERFECTIONS amp SELECTION amp MACRO JOINT amp MACRO ELEMENT module name amp EIGENVECTORS amp PUSHOVER ANALYSIS amp STATIC INITIAL CONDITIONS amp JUMP amp LABEL amp DEBUG amp EVALUATE The above amp MAIN COMMANDS input structure represent general ATENA input command Each amp ENTRY represents a group of input command that is described later Most of the present commands are used to define some entity for description of your finite element model The exception to that is amp STEP command that contains a keyword EXECUTE Processing of this keyword forces ATENA to carry on the analysis The ATENA input commands can appear in any order in the input file only the amp TASK command has to be the 1 one as it specifies dimension for many other entities such as joint coordinates It is possible to reference an entity prior it was even defined Although it is not recommended ATENA does accept that but don t forget to define them later If you do ATENA will not issue any error or warning messages as the program assumes default values for most of the undefined entities Such an error remains usually untapped until issuing the STEP
155. LICATES ensures that only one element can contribute the load along any part of the loaded edge The EDGE and EDGE NO DUPLICATES keywords replaced with their synonyms LINE LINE NO DUPLICATES with the same effect The flag MULTIPLE YES NO specifies whether the boundary load is aplicable for multiple surfaces edges or only for a single surface edge per one finite element The MERGE flag is used if the current boundary load should be merged with a previous boundary load within the same load case MERGE STRING str allows merging only boundary loads with the same MERGE STRING str The merging is successful if the current and the other boundary load are of the same type edge surface and have the same values Other parameters e g function id coeff x etc are not tested and values from the other boundary load are adopted If the merging is not successful then the current boundary load is processed in the same way as it would without the MERGE flag The NO ELEM OUTPUT flag suppress element boundary related output at element level Note that only single element surface or edge can be loaded within single boundary load Hence use MERGE option with caution TYPE STRING str is used only for output data aggregation Element temperature load amp TEMPERATURE ELEMENT LOAD that corresponds to element initial strain load where initial strains are calculated based on material expansion coefficient and specified temperature Th
156. LIMIT amp LOCATION PARAMS Table 24 amp LINE_SEARCH_PARAMS sub command parameters Parameter Description ITERATION CONTROL CONTROL REFERENCE ETA x UNBALANCED Limit for relative work of out of balanced forces within the main iteration When satisfied it stops Line search internal iteration loops By default it is set to x 0 8 It says that Line search has by default reduce work of out of balanced forces by 20 ENERGY LIMIT x 42 amp LINE SEARCH ITERATION CONTROL LINE SEARCH WITHOUT ITERATIONS LINE SEARCH WITH ITERATIONS LINE SEARCH ITERATION LIMIT nj j Table 25 amp LINE SEARCH ITERATION CONTROL sub command parameters Parameter Description LINE SEARCH WITHOUT Do not carry internal Line search iteration loop within each ITERATIONS main iteration LINE SEARCH WITH Carry on internal Line search iteration loop within each ITERATIONS main iteration LINE SEARCH _ Set line search iteration limit Default value is 3 iterations ITERATION LIMIT n amp LIMIT ETA CONTROL LIMIT ETA MINIMUM MAXIMUM ETA x Table 26 amp LIMIT_ETA_CONTROL sub command parameters Parameter Description LIMIT ETA Apply limit value for n ma Only n multiple of coordinate changes are applied to the next iteration It is set automatically when issuing either of the commands MINIMUM ETA x and or MAXIMUM ETA x MINIMUM ETA x Sets Nmin x By default it is set to x
157. LUBC DCGS parallel direct sparse solver PARDISO from the MKL provided LUCS DOMN LUOM by Intel Visual Fortran The skyline and sparse SLAP storage DGMR LUGM schemes are described in the Theoretical Manual for Atena software The direct sparse solvers DSS LLT and DSS LDLT differ in type of factorization they use It is LL and LDL respectively In case of unsymmetric structural matrix both solvers use LU factorisation The table below lists all the available solvers with their brief characteristic and recommendation for use Default LU SOLVER BLOCK SIZE This value set granularity size for the solvers DSS and n DSS_LDLT It defines a block size during pre factorisation process The higher value the lower number of structural blocks and smaller RAM overhead for mapping the structural matrix On the other hand a higher value results in higher waste of RAM to store the actual data of the matrix It is recommended to set this value to something in range lt 2 6 gt Default 2 SLAP ITERATION Maximum number of iterations allowed within an iterative linear LIMIT n problem solver Default number of structural degree of freedom SLAP SAVED VECTO Number of direction vectors to save and orthogonalize against R LIMIT nsave This parameter is only used by the following iterative solvers DOMN LUOM nsave gt 0 and DGMR LUGM save 70 In all cases nsave lt ndofs where ndofs is number of degree of freed
158. N BEAM NL CONNECTION LIST OF NODES ist of nodes SKIP DOFS MASK skip mask MAX COORDS TOL max tol Table 117 NL CONNECTION description The BEAM NL CONNECTION command forces ATENA browse thru all CCBeamNL 3 element groups and elements in it If position of one element axial end node is closed to the same of another element the two end nodes are connected If list of nodes is not defined this operation is carried out for all detected nodes Otherwise only nodes from the list can be connected In the same way this boundary condition connects all detected nodal deggre of freedom i e typically 6 unless skip mask is defined If it is defined the DOFs with the corresponding bit set ON are skipped The last parameter i e max tol defines proximity region from where two points are assumed to be candidate for the connection It is given in absolute length unit i g 0 001 ATENA Input File Format 187 4 5 Step and Execution Commands 4 5 1 The Command amp STEP Syntax amp STEP STEP ID n TOz BY n3 amp STEP TYPE AND DATA EXECUTE j Currently the following step types are available amp STEP TYPE AND DATA amp STATIC STEP DEFINITION amp TRANSIENT STEP DEFINITION amp CREEP STEP DEFINITION amp DYNAMIC STEP DEFINITION Table 118 amp STEP command parameters Parameter Description IDn TOn BYns Steps interval that would be executed by EXECUTE subcommand By default n3 n 7
159. N of the generated or directly inputed moisture air velocity fnc id temperature boundary load 274 ACCOUNT NEGLECT Acount for or neglect various kinds of moisture heat GRADIENT OF flux contribution RELATIVE HUMIDITY RELATIVE HUMIDITY usual Darcy mositure TEMPERATURE flux due to gradient of relative humidities HUMIDITY RATIO TEMPERATURE usual heat flux due to EVAPORATED MOISTURE temperature gradient HUMIDITY CEMSTONE CALC HUMIDITY RATIO moisture flux due to 1 evaporation i e due to gradient of air humidity ratio gradient EVAPORATED MOISTURE heat flux due to flux of evaporated moisture CEMSTONE CALC moisture flux due to evaporation calculated according to http www cemstone com concrete evaporation forecast engineers cfm EDGE EDGE NO DUPLICATES SURFACE Type of boundary load that is applicable for the given fire load For more explanation see amp BOUNDARY ELEMENT LOAD 4 11 7 amp Transport analysis additional output data In addition to standard output the transport analysis offers also the following output data Table 175 Transport analysis related Output type keywords understood by the command amp OUTPUT for the location type NODES Output keyword Moisture nodal fluxes Heat nodal fluxes CURRENT PSI VALUE Current values of nodal state variables in nodes at E the start of the current time step UU Table 176 Transport analysis related Output type k
160. ODE 9 MATERIAL TYPE 1 TEMP 40 NODE 10 MATERIAL TYPE 1 H 1 TEMP 40 Boundary conditions SELECTION all list 123456789 10 280 SELECTION all3 8 list3 45678 SELECTION all9 10 list 9 10 SELECTION all1 2 list 1 2 SUPPORT SIMPLE SELECTION all dof 1 const 0 fix h SUPPORT SIMPLE SELECTION all3 8 dof 2 const 0 fix T LOAD SIMPLE SELECTION 119 10 dof 2 const 1555200 fix T LOAD SIMPLE SELECTION all1 2 dof 2 const 1555200 fix T Equivalent BC compared only for ONE step of analysis SUPPORT SIMPLE SELECTION all dof1constO fix h SUPPORT SIMPLE SELECTION all dof2 const 0 fix T ui TASK name Test analysis for RHS and LHS BCs TITLE 2D quadrilateral in Y direction with vertical flux of heat to the bottom DIMENSION 2 Set analysis options switches SET Static SET Newton Raphson ISET Full NR SET Absolute Displacement error 0 00000001 SET Absolute Residual error 0 00000001 SET Displacement error 0 00000001 SET Residual error 0 00000001 SET Optimize band width SET TRANSIENT TIME CURRENT 0 INCREMENT 0 00069 SET TRANSIENT TIME INTEGRATION CRANK NICHOLSON THETA 1 0 SET REFERENCE ETA 0 8 Coordinate definition JOINT COORDINATES 4 elements 0 15 0 25 placed vertically ATENA Input File Format 10 0 2 0 15 0 3 0 0 25 4 0 15 0 25 50 0 5 6 0 150 5 7 0 0 75 8 0 15 0 75 90 1 10 0 15 I Material definition MATERIAL ID 1 NAME Baxant Xi TYPE
161. OF 2 VALUE 5 SUPPORT SIMPLE NODE 5 DOF 2 VALUE 10 SUPPORT SIMPLE NODE 6 DOF 2 VALUE 10 SUPPORT SIMPLE NODE 7 DOF 2 VALUE 15 SUPPORT SIMPLE NODE 8 DOF 2 VALUE 15 LOAD SIMPLE SELECTION all9 10 dof 2 const 1555200 fix T LOAD SIMPLE SELECTION all1 2 dof 2 const 1555200 fix T load alternative 3 additional temperature increment induced by dT dy and dQ at the top and bottom LOAD CASE ID 4 NAME LC 2 additional temperature increment total dT dx 40 i e increment at fixed nodes 20 incr of Q already in LC 1 SUPPORT SIMPLE SELECTION all dof 1 const O0 fixh 284 SUPPORT SIMPLE NODE 3 DOF 2 VALUE 5 SUPPORT SIMPLE NODE 4 DOF 2 VALUE 5 SUPPORT SIMPLE NODE 5 DOF 2 VALUE 10 SUPPORT SIMPLE NODE 6 DOF 2 VALUE 10 SUPPORT SIMPLE NODE 7 DOF 2 VALUE 15 SUPPORT SIMPLE NODE 8 DOF 2 VALUE 15 LOAD BOUNDARY group 1 TO 1 BY 1 VALUE DOF 2 2073600 NODES all9 10 LOAD BOUNDARY group 1 TO 1 BY 1 VALUE DOF 2 2073600 NODES all1 2 STEP ID 2 STATIC NAME BCs and load LOAD CASE 2 1 0 EXECUTE step execute command for the load alternative 1 STEP ID 2 STATIC NAME BCs and load LOAD CASE 3 1 0 EXECUTE step execute command for the load alternative 2 STEP ID 2 STATIC NAME BCs and load LOAD CASE 4 1 0 EXECUTE step execute command for the load alternative 3 OUTPUT LOCATION NODES DATA LIST CURRENT PSI VALUES EXTERNAL FORCES INTERNAL FORCES REACTIONS END
162. ONE SANDSTONE LIGHTWEIGHTSANDSTONE THICKNESS thick FCYL28 f 4 E28 FCYLO 28 FT28 fi GF28 G ALPHA HUMIDITY humidity DENSITY density END OF CURING TIME endcuring LOAD CURRENT TIME time SHRINKAGE COMPLIANCE measured val HISTORY TIME time HUMIDITY humid TEMPERATURE temper Table 89 amp CCModelEN1992 sub command parameters Parameter Description CEMENT CLASS Type of cement see e g http www cis org rs en cms about 32 5N 32 5 42 5 cement standardization of cement To SIN STOP Strength classes of cement Cements are according to standard strength grouped into three classes they being Class 32 5 Class 42 5 Class 52 5 Three classes of early strength are defined for each class of standard strength e Class with ordinary early strength N e Class with high early strength Class with low early strength L Class L can be applied only on CEM III cements Default value class 42 5N AGGREAGETE Type of aggregate Note that light weight concrete is detected BASALTDENSELIMES for concrete with density below 2000kg m and some aditional QUARTZITE __ meassures taken for LIGHTWEIGHTSANDSTONE LIMESTONE aggregate SANDSTONE LIGHTWEIGHTSANDS TONE Default value QUARTZITE THICKNESS thick Ratio volume m surface area n of cross section For long elements it is approximately cross sectiona
163. OORDINATES SPEC ENFORCED ID DELETE j amp COORDINATES SPEC COORDINATES ID n NCOORDS ncoords X ncoords Table 154 amp MACRO JOINT command parameters This command adds new macro joints to the model The joints are used for example for reinforcement bar generation Each macro joint coordinate should be on a separate line e g ID n X XI X2 X3 If ncoords is not specified it is by default equal to problem dimension see amp TASK ATENA Input File Format 245 This command adds new macro joints to the model or deletes the existing one The joints are used for example for reinforcement bar generation Each macro joint coordinate should be on a separate line e g ID n X X X2 X3 If ncoords is not specified it is by default equal to problem dimension see amp TASK The ENFORCED keyword has the same meaning as in DELETE command 4 10 4 The Command amp MACRO ELEMENT These commands are used to define or remove a macroelement definition which is employed to generate finite element nodes and elements of a FE model to be analysed Several types of macroelements exist and one can think of macroelement the same was as about finite element types Each type of a macroelement set exactly a method for how some finite elements and their nodes should be generated Input data for a macroelement consists of two parts macroelement specific part and macroelement common part Each macroelement has it
164. OT 1 PLOT 2 EACH ITERATION STEP every iteration or step If the keyword MONITOR is specified the MONITOR 1 set is used Two output sets are available one called MONITOR 1 and the other MONITOR 2 Both of them can be used for monitoring output data per iteration or per step however it is not recommended to mix ouput monitors per iteration with monitors per step into the same monitor set It would result in a table with data delivered by iterations with empty slot for data monitored per step when convergence was not reached yet Hence one of the monitors is typically used for monitoring output at each iteration and the other for output at each step Two output sets are particularly useful if AtenaWin Atena Studio is used for execution of the ATENA analysis This is because AtenaWin AtenaStudio can directly plot all the data from the monitors into 2D plots without need of any thirty party SW However in this case it is recommended to use the set MONITOR 1 for output monitors per iteration and the set MONITOR 2 for monitors per step because AtenaWin AtenaStudio automatically allocates a monitor with information about analysis convergence called ConvergenceMonitor into the set MONITOR 1 and it produces convergence information per iteration The monitor MONITOR 1 is thus pre selected to output monitors per iteration and MONITOR 2 remains free for step monitors The option MONITORS is used for export import data
165. REDSHELL Element idealisation EAM NL 3D BEAM 3D BRICK BRICK EAM NL ID BEAM 3D N Hd 4 ca ie 72 8 gt lt d Material idealisation ONE D BEAM 3D BEAM SHELL THREE D THREE D THREE D BRICK BEA SHAPE BAR SHAPE BAR SHAPE BRIC SHAPE BRICK SHAPE QUADRILATERAL a en 9 e E m T a m A lt T iz SHAPE SHELL WEDGE 3D SHAPE BRICK SHELL LAYERED SHELL LAYEREDSHELL The above tables apply in full for static and dynamic analysis As far as creep analysis is concerned it uses time independent and time dependent materials Time independent material as indicated by the name does not change its behaviour with age Such a material is e g used for reinforcement Any material from the above table can be used as time independent material for creep analysis On the other hand concrete is known to change its properties with time and therefore within a creep analysis it must be modelled by a time dependent material amp CREEP MATERIAL Only materials marked with from the above table can be used as the parameter short_term_material_type refering to the definition of amp CREEP MATERIAL Transport analysis uses completely different element types and element material models They are described in Section 4 11 Any transport element type can be used in conjugation with any transport material model amp ELEMENT INCIDENCES NNODES num_nodes Defined b
166. S ALPHA METHOD SET TRANSIENT NEWMARK BETA 0 2505 GAMMA 0 5 DAMPING MASS COEFFICIENT 1 789 STIFFNESS COEFFICIENT 0 IIISET TRANSIENT NEWMARK BETA 0 2505 GAMMA 0 5 DAMPING MASS COEFFICIENT 0 STIFFNESS COEFFICIENT 0 1396 SET NEMARK METHOD OUTPUT MONITOR 2 NAME displ node 1 X EACH STEP LOCATION NODES Node FROM 49 TO 56 BY 1 DATA LIST DISPLACEMENTS END ITEM FROM 1 TO 1 OUTPUT MONITOR 2 NAME force node 1 X EACH STEP LOCATION NODES Node FROM 49 TO 56 BY 1 DATA LIST PARTIAL INTERNAL FORCES END ITEM FROM 1 TO 1 Executing STEP id 1 TYPE DYNAMIC Load No 1 AT 0 0 LOAD CASE FIXED 1 1 0 INCREMENT 2 0 001094800003 STEP id 2 TYPE DYNAMIC name Load No 2 AT 0 1 LOAD CASE FIXED 1 1 0 INCREMENT 2 0 001077716015 STEP id 3 TYPE DYNAMIC name Load No 3 AT 0 2 LOAD CASE FIXED 1 1 0 INCREMENT 2 0 001043814628 STEP id 4 TYPE DYNAMIC name Load No 4 AT 03 LOAD CASE FIXED 1 1 0 INCREMENT 2 0 000993624865 STEP id 5 TYPE DYNAMIC name Load No 5 AT 04 LOAD CASE FIXED 1 1 0 INCREMENT 2 0 000927929917 STEP id 6 TYPE DYNAMIC name Load No 6 AT 0 5 LOAD CASE FIXED 1 1 0 INCREMENT 2 0 847754933E 3 STEP id 7 TYPE DYNAMIC name Load No 7 AT 0 6 LOAD CASE FIXED 1 1 0 INCREMENT 2 0 754351018E 3
167. S n EIGENVAL ERROR r MAX NUMBER OF SSPACE ITERATIONS REQUEST STURM SEQUENCE CHECK YES NOj MAX NUMBER OF JACOBI ITERATIONS NUMBER OF PROJ VECS n SHIFT EIGENVALUES shift Table 142 The eigenvalue analysis SET parameters Parameter Description NUMBER OF EIGENV Sets number of the lowest eigenmodes that should be calculated ALS n Default value 10 ATENA Input File Format 209 MAX EIGENVAL ERR Maximum eigenvalues error that is tolerated DET Default value 1 E 6 MAX NUMBER OF S Max number of subspace iterations SPACE ITERATIONS 7 Default value 16 STURM SEQUENCE C Flag for requesting Sturm check that no eigenvalue got missed HECK YES NOj during the solution This check is supported only by the direct skyline solver Using of a sparse matrix solver will turn down eventual request for the Sturm check MAX NUMBER OF J Max number of iteration within Jacobi The Jacobi procedure ACOBI ITERATIONS n computes eigenmodes of the projected global eigenvalues problem via minimization of Rayleigh quotient Hence within each main iteration of inverse subspace iteration method another iterating process is executed in Jacobi The value of n sets maximum number of these iterations that are allowed Default value 12 NUMBER OF PROJ V Defines number of projection vector used by Rayleigh quotient method It must be equal or bigger than the number of required eigenvalues Default value min 2
168. SATION dimension is to be used in a finite element with lower dimension For instance in case a 3D model is to be used in 2D configuration Units none Acceptable range 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D SHELL BEAM 3D MEMBRANE AXIj Default value program tries to determine a suitable idealisation based on the dimension of the material model and the dimension of the finite element where it is used So in most cases it is not needed to use this command In certain cases however the program cannot determine correctly the idealisation to use Such a case is for instance if a 3D model is to be used in 2D element Then it is necessary to directly specify if plane stress or strain idealisation is to be used ATENA Input File Format 125 Advanced properties UserMaterialDLL The name of the user provided dynamic link library DLL user lib name dll implementing the material model Please note this parameter has to be the first one because the others except for those inherited from the elastic material are not be known to the kernel until the user DLL is loaded User defined properties UserParameterN The acual parameter names are defined in the DLL provided by the user Only floating point parameters are supported 4 3 5 Interface Material 4 3 5 1 Sub command amp INTERFACE MATERIAL Syntax amp INTERFACE MATERIAL TYPE CC2DInterface CC3DInterface K_NN KNN x K_TT KTT x COHESION
169. SIENT HUGHES ALPHA 0 00 or uncomment comment the relevant lines TASK name Test Ahmad elems dimension 3 orum iM Material definition rns iM MATERIAL id 1 name Spring type CC3DElastlIsotropic E 30 Mu 0 00 Rho 0 000000000001 Alpha 1 200E 05 MATERIAL id 2 name Spring type CC3DElastIsotropic E 30000000 ATENA Input File Format 211 Mu 0 00 Rho 156 Alpha 1 200E 05 l Element type definition l ELEMENT TYPE id 1 name 1D Truss type CCAhmadElement33L9 Geometry definition GEOMETRY ID 1 Name Spring TYPE LayeredShell SOLID LAYER 1 MATERIAL 1 THICKNESS 0 2 LAYER 2 MATERIAL 1 THICKNESS 0 2 LAYER 3 MATERIAL 1 THICKNESS 0 2 LAYER 4 MATERIAL 1 THICKNESS 0 2 LAYER 5 MATERIAL 1 THICKNESS 0 2 LAYER 6 MATERIAL 1 THICKNESS 0 2 LAYER 7 MATERIAL 1 THICKNESS 0 2 LAYER 8 MATERIAL 1 THICKNESS 0 2 LAYER 9 MATERIAL 1 THICKNESS 0 2 LAYER 10 MATERIAL 1 THICKNESS 0 2 Joint coordinates definition
170. STRATEGY amp ARC LENGTH PARAMS amp LINE SEARCH PARAMS amp OPTIMIZE PARAMS amp SERIALIZE PARAMS SOLVER KEYS amp FATIGUE PARAMS amp CREEP ANALYSIS PARAMS amp DYNAMIC ANALYSIS PARAMS SOLVE LHS BCS ON SOLVE LHS BCS OFF amp MAX REF IDS EXTERNAL IDENTIFIERS INTERNAL IDENTIFIERS DISABLE REPORT TASK ENABLE REPORT TASK REPORT LOCATION STEP n DISABLE REPORT LOCATION ENABLE REPORT LOCATION USE BEST ITERATION FOR CRITERION USE BEST ITERATION FOR CRITERIA n n2 UNUSE BEST ITERATION FOR CRITERION UNUSE BEST ITERATION FOR CRITERIA n n2 BEST ITERATION MIN ID STEP LOAD REDUCTION ALLOWANCE n REDUCE STEP LOAD COEFF v MIN LHS BCS MASTER NODE COEFF n Table 6 amp SET command parameters Parameter Description amp ANALYSIS TYPE Set what type of analysis is executed i e static transient etc amp LINEAR SOLVER TYPE Use direct or iterative solver and set some vital parameters for the iterative solver amp CONVERGENCE CRITERIA Convergence criteria during iteration process within each load step amp SOLUTION METHOD Choose solution method for the analysis amp ARC LENGTH PARAMS Set parameters for Arc Length method amp LINE SEARCH PARAMS Set parameters for Line Search method amp PREDICTOR TYPE Set which type of predictor should be used for building stiffness matrix i e elastic tangential or secant amp UPDATE DISPLS STRATEGY Strategy for upda
171. T RT F T R FCJRC F CJR Cjx FCO RCO F CO R x GF x CRACK SPACING TENSION STIFF x WD x EPS CP x ATENA Input File Format 87 FC REDUCTION EXCx ALPHA FT MULTIP x SHEAR FACTOR x AGG SIZE x UNLOADING x PARAM parameter name Fi IDEALISATION 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D DAMPING MASS x DAMPING STIFF xx This material is identical to the previous material 3DNONLINCEMENTITIOUS2 but its selected material parameters can be changed during the analysis to simulate for instance material degradation Table 67 amp 3DNONLINCEMENTITIOUS2VARIABLE sub command parameters Parameter Description Basic properties Ex Elastic modulus Units 17 Acceptable range 0 maximal real number gt Default value 30 x 10 f f Generation formula 6000 15 5 WR flf this formula is valid only if 15 compressive cube strength given as positive number in MPa MU POISSON NY Poisson s ratio Units none Acceptable range 0 0 5 Default value 0 2 FT RT F T R Tj x Tensile strength Units 17 Acceptable range 0 maximal real number Default value 3 f f 2 Generation formula FT 0 2482 f f FC RC F C R Compressive strength Units 17 Acceptable range minimal real number 0 Default value 30 f f Generation formula FC 0 85 R f f Tensile properties GF x S
172. T AT NODE 1 OR DATA BY LO NODAL DISPLACEMENT AT NODE 2 CATION NODAL DISPLACEMENT AT NODE n ELEMENT NODE ELEMENT IPS AND ELEMENT Location s data are splitted by elements e g FORCES AT GROUP 20 ELEMENT 4 The level 3 is not accounted for STANDARD Output format is set to table oriented form i e items are printed in separate tables Each line of such a table presents results for one location Output command request is processed immediately after its issuing NAME set name Name of monitor output set INTERPOLATE Export Import data from to specified monitors The export is FULL NONE always for the current step i e time The import is for time saved STEP EXPORT in import archives When importing linear interpolation of DATA CMDS TO monitored output data can be requested If INTERPOLATE filename STEP is specified the imported output data are smoothly IMPORT connected to the data from the recent step If INTERPOLATE DATA CMDS FULL is input the imported data get connected to the lastly FROM entered value e g typically value for a last previous step where filename 1 the data were monitored for the last time INTERPOLATE filename 2 suppresses any interpolation filename is binary file into filename n which the data are exported filename 1 filename 2 filename n are filenames of previously exported data that should be now imported
173. TE W as linear combination GENERATE TEMP CONST const COEFF X coeff x COEFF Y coeff y COEFF Z coeff z value const x coeff y coeff z coeff x y z are coordinates of nodes where the generation is processed Example NODAL TEMP SETTING NODE 1 MATERIAL TYPE 1 TEMP 20 NODAL SELECTION selection GENERATE TYPE 1 CONST 0 5 COEFF X 0 COEFF Y 0 6523648649 COEFF Z 0 GENERATE H CONST 10 COEFF X 0 COEFF Y 0 COEFF Z 0 GENERATE 4 11 4 Transport Set parameters The transport analysis SET related input is specified via the ANALYSIS TYPE subcommand Table 169 amp ANALYSIS TYPE sub command parameters amp TRANSIENT Set transient analysis and set some parameters for it amp CONVERGENCE CRIT criteria for the transport analysis ERIA amp TRANSIENT TRANSIENT TIME CURRENT x TIME INCREMENT x TIME INTEGRATION CRANK NICHOLSON THETA x ADAMS BASHFORTH REFERENCE ETA eta Table 170 ANALYSIS TYPE subcommands for the transport analysis Parameter Description TIME CURRENT x TIME INCREMENT x ATENA Input File Format 269 TIME INTEGRATION Set type of temporal integration scheme If this parameter is not input then CRANK NICHOLSON integration will be used CRANK NICHOLSON Use linear trapezoidal integration THETA x parameter for trapezoidal integration By default 0 5 Several other linear temporal integration may b
174. TEP EXECUTE command is ignored The analysis can resume only if STOP FLAG is manually set to 0 Units none Default 0 MONITOR ID n Id of a monitor where LD diagram from the analysis is stored It can be 1 or 2 to utilize output monitor 1 or 2 Units none Default 1 FORCE MONITOR NAME name Name of the monitor to record forces used in the LD diagram Units none Default LD DIAGRAM VALUE Y FORCE ITEM ID n Item number used by the above Units none Default 1 DISPLS MONITOR NAME name Name of the monitor to record displacementss used in the LD diagram Units none Default LD DIAGRAM VALUE X DISPLS ITEM ID n Item number used by the above Units none 232 Default 1 GAMMA FACTOR D x Tansformation factor for deformations between MDOF and SDOF called Gamma in Eurocode Units none Default 1 GAMMA FACTOR F x Tansformation factor for forces between MDOF and SDOF called Gamma in Eurocode Units none Default 1 GAMMA FACTOR x Tansformation factor for forces and deformations between MDOF and SDOF called Gamma in Eurocode Supported for compatibility reasons Now replaced by GAMMA FACTOR D and GAMMA FACTOR F Units none Default 1 MASS NORM x Equivalent mass of SDOF called m star in Eurocode Units weight e g kg Default 1 Equivalent mass of MDOF used e g by Romanian Building Code Units weight e g kg Default 1 PERIOD T Bx Time pe
175. TRESSED START END BOTH PERIMETER x PRECISION FACTOR x DAMPING FACTOR x o Table 45 amp EXTERNAL_CABLE_GEOMETRY_SPEC sub command parameters Parameter Description AREA COEFFICIENT friction jin CONSTANT frictioncons RADIUS radius Cross sectional area or spring thickness of a point spring or line spring object respectively Default 1 0 E g AREA x Parameters defining calculating friction force at a deviator for external cables or cohesion for bar with bonds For external cables the frictional force is computed as follows 1 a max Fie b where For frictionjin gt 0 exp abs Pleft Pright frictioniin else a frictionj For frictioncons gt 0 b abs Quoi frictiOnconst radius else b frictionconst o angle of cable in radians F force in cable radius radius of deviator defined by parameter RADIUS frictionjn friction coefficient defined by parameter FRICTION COEFFICIENT frictiontin frictioncons friction coefficient defined by parameter For bar with bonds frictioncons defines cohesion stress between the bar and a material into which the bar is embedded stress units friction is not used 52 Example FRICTION CONSTANT E g FRICTION COEFFICIENT x CONSTANT x RADIUS x FIXED START END If specified the starting node and or the end node of the reinforcement bar is fixed with respe
176. Tension stiffening Units none Acceptable range lt 0 1 gt Default value 0 0 Compressive properties EPS CP x Plastic strain at compressive strength Units none Acceptable range lt minimal real number 0 gt Default value 0 001 Generation formula FC E 108 FCO F RCO x Onset of non linear behavior in compression Units F 1 Acceptable range lt minimal real number FT 2 Default value 20 f f Generation formula FC 2 3 WDx Critical compressive displacement Units 1 Acceptable range lt 0 maximal real number gt Default value 0 0005 fi Miscellaneous properties EXC x Eccentricity defining the shape of the failure surface Units Acceptable range 0 5 1 07 Default value 0 52 BETA x Multiplier for the direction of the plastic flow Units Acceptable range minimal real number maximal real number gt Recommended range 2 2 Default value 0 0 RHO x Material density Units M P Acceptable range 0 maximal real number Default value 0 0023 f f ALPHA x Coefficient of thermal expansion Acceptable range 0 maximal real number Default value 0 000012 FIXED x Fixed smeared crack model will be used Units none Acceptable range lt 0 gt Default value 0 25 FT MULTIP x Multiplier for tensile strength in the plastic part of the fracture plastic model in order to ensure that plastic surface and fracture surface intersect each other AT
177. URE INTEG STRESS Cross sectional forces and moments for bended elements ELEM MASS ACCEL LOAD IN Element load increments due to the element s acceleration for a particular step transformed into nodal concentrated forces TOTAL MASS ACCEL LOAD Total element load due to the element s acceleration transformed into nodal concentrated forces BEAM FORCES Nx Vy Vz Kx My Mz beam forces for CCBeam3D element 200 ULTIMATE BEAM FORCES Ultimate Nx Vy Vz Kx My Mz beam forces for CCBeam3D element only for beam with a material derived from CCBeamBaseMaterial BEAM NL PARAMS Several parameters describing element state conditions for CCBeam3D element only for beam with material derived from CCBeamBaseMaterial CARBONATION DATA AT surfa Data about concrete degradation due to ce_name carbonation progressing from surface surface_name CHLORIDES DATA AT surface Data about concrete degradation due to chlorides name progressing from surface surface name Table 130 Output type keywords understood by the command amp OUTPUT for the location type NODES DOM DOFs boundary conditions STRAIN Green Lagrange strains TOTAL STRAIN Total strain including initial strains due to element load PRINCIPAL STRAIN STRESS PRINCIPAL STRESS Principal element stresses SBETA STATE VARIABLES State variables for SBETA material model at nodes Similar output is available also for other materials See ATENA 2D User s Manual section 2 6
178. able 88 amp CCModelFIB MC2010 sub command parameters Parameter Description ATENA Input File Format CEMENT CLASS 32 5N 32 5R 42 5N 42 5R 52 5N 52 58 AGGREAGETE BASALTDENSELIMES TONE QUARTZITE LIMESTONE SANDSTONE LIGHTWEIGHTSANDS TONE THICKNESS thick FCYL28 fois FCYLO 28 P toos 147 Type of cement see e g http www cis org rs en cms about cement standardization of cement Strength classes of cement Cements are according to standard strength grouped into three classes they being Class 32 5 Class 42 5 Class 52 5 Three classes of early strength are defined for each class of standard strength e Class with ordinary early strength N e Class with high early strength Class with low early strength L Class L can be applied only on CEM III cements Default value class 42 5N Type of aggregate Note that light weight concrete is detected for concrete with density below 2000kg m and some aditional meassures are taken for LIGHTWEIGHTSANDSTONE aggregate Default value QUARTZITE Ratio volume m surface area m of cross section For long elements it is approximately cross sectional area m perimeter m Default value 0 0767 m Cylindrical material strength in compression f 28days This value is crucial for the creep model s prediction i e prediction of material compliance 7 7 and cylindrical compression strength f
179. ad SCALE CONSTANT step as follows B Braticberganiast This strategy tries to keep the same impact of changes happening in loading and geometric space LOADING DISPLACEMENT Adjusts the previous option for each new load BERGAN CONSTANT step as follows Bias berganoa berganis Subscript oa stands for one before the results This ATENA Input File Format 41 strategy tries to keep the same ratio of influence of loading and geometric space amp LOCATION PARAMS LOCATION NODE AT FROM n1 TO n2 BY n3 DOF AT n FROM n1 n2 BY n3 COEFF REMOVE Table 23 amp LOCATION_PARAMS sub command parameters Parameter Description LOCATION Specifies list of domains Each from these domains contains list of structural DOFs and their coefficients used for calculation Arc length step length REMOVE It destroys list of domains and in the subsequent steps all structural DOFs will be accounted for NODE It follows list of nodal intervals Any number of intervals can be specified DOF It follows list DOFs intervals Any number of intervals can be specified Set location at node or degree of freedom n FROM n Sets locations at nodes or degrees of freedom by interval BY TO n BY n5 default n n and n 1 COEFF x Weight factor for the specified DOF amp LINE SEARCH PARAMS amp LINE SEARCH ITERATION CONTROL amp LIMIT ETA CONTROL REFERENCE x UNBALANCED ENERGY
180. ading factor which controls crack closure stiffness Acceptable range lt 0 1 gt 0 unloading to origin default 1 unloading direction parallel to the initial elastic stiffness IDEALISATION Defines the idealisation if material model with higher dimension is to be used in a finite element with lower dimension For instance in case a 3D model is to be used in 2D configuration Units none Acceptable range 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D Default value program tries to determine a suitable idealisation based on the dimension of the material model and the dimension of the finite element where it is used So in most cases it is not needed to use this command In certain cases however the program cannot determine correctly the idealisation to use such a case is for instance if a 3D model is to be used in 2D element Then it is necessary to directly specify if plane stress or strain idealisation 1s to be used DAMPING MASS x Mass and stiffness damping factors specified for indiviual element group They overwrite the same factor set for the whole DAMPING STIFF 7 E structure by SET command 4 3 2 6 Sub command amp 3DNONLINCEMENTITIOUS2SHCC amp 3DNONLINCEMENTITIOUS2SHCC TYPE CC3DNonLinCementitious25HCC Ex POISSON NY x FT x x FIBER VOLUME FRACTION x FIBER E MODULUS FIBER SHEAR MODULUS x FIBER CROSS SECTION FACTOR x FIBER DIAMETER x
181. al purpose finite element code with many special features for non linear analysis of plain and reinforced concrete structures This document serves as a manual describing the syntax and format of ATENA input commands in its input file This command file is often called also input file and it is used to define finite element model to specify the loading history and to activate the finite element non linear analysis 2 PROGRAM EXECUTION There are several methods how to execute the finite element module ATENA The heart of the analysis module is contained in a dynamically linked library ATENADLL DLL This module can be utilized either via its COM object interface CCCoAtena or from the command console by executing either AtenaConsole exe or AtenaWin exe or ATENAStudio exe program The CCCoAtena is used by AtenaGUI graphical pre and postprocessor and its use is described in a separate part of ATENA documentation Here the starting the analysis usin AtenaConsole AtenaWin and ATENAStudio executables is described The programs are executed as follows AtenaConsole D path P M module name O input file output file message file error file reset desktop translate 1ds extend int output width extend real output width catch fp instructs demo mode silent num threads 7 num iters per thread m AtenaWin D path M module name O input file output file message file error file translate ids
182. ape factor It should be 1 1 15 1 25 1 3 1 55 sfactor for slab cylinder square prism sphere cube respectively Default value 1 25 WATER AIR conditions either under in water or air under normal STEAM CURING temperature conditions WATER AIR or steam condition 5 Default value AIR END OF CURING Time at beginning of drying i e end of curing days Default value 7 da TOTAL LOSS Total water loss at zero humidity and infinite time 144 Default 0 kg LOAD CURRENT Current or load time for the subsequent measured value TIME time Default 0 days LOSS SHRINKAGE Measured water loss at current humidity shrinkage material COMPLIANCE compliance measured val for previously specified load and measured val current time Units of water loss must correspond to units of total water loss shrinkage is dimension less and compliance is input in kPa amp CCModelB3Improved DATA CCModelB3Improved CONCRETE concrete type THICKNESS thick FCYL28 Jaiz E28 ECYLO_28 Iona pr28 s GF28 ALPHA 4 HUMIDITY humidity DENSITY density AC ac WC we SHAPE FACTOR sfactor WATER AIR STEAM CURING END OF CURING TIME endcuring EPS A INF Ea TAU TIME S INF TOTAL LOSS total_water_loss LOAD CURRENT TIME time LOSS SHRINKAGE COMPLIANCE measured_val HISTORY TIME time
183. ared reinforcement with respect to the base material Units none Acceptable range lt 0 1 gt Default value 0 01 DIRECTION x x x3 Unit vector defining the smeared reinforcement direction The third component x is required in case of 3D analysis Units Acceptable range lt minimal real maximal real number gt Default value 1 0 0 RHO x Material density Units M P Acceptable range 0 maximal real number Default value 0 00785 f f ALPHA x Coefficient of thermal expansion Units 1 T Acceptable range lt 0 maximal real number Default value 0 000012 F MULTIP x Function multiplier Can be used to scale the function defining ATENA Input File Format 131 the stress strain relationship Units none Acceptable range 1 maximal real number Default value 1 0 COMPRESSION x Compression flag Can be used to deactivate the compressive response of the reinforcement 0 reinforcement cannot carry any compressive forces but only tensile 1 reinforcement works both in tension and compression Units none Acceptable range 0 or 1 Default value 1 amp CIRCUMFERENTIAL SMEARED REINFORCEMENT TYPE CCCircumferentialSmearedReinforcement Ex FUNCTION z RATIO x RHO x ALPHA x F MULTIP x Table 80 amp CIRCUMFERENTIAL SMEARED REINFORCEMENT command parameters Basic properties Ex Elastic modulus Units 17 Acceptable range 0 maximal real number Default value 210 x 10
184. at step INIT STEP ID This load must be included only in a load case being used for the definition of step n Othe steps will ignore it CHLORIDES and CARBONATION element load does not represent a real load It merely forces Atena to calculate degradation of reinforced concrete elements due to progression of carbonation and or chlorides from their outside surfaces The input data resembles amp BODY ELEMENT LOAD It applies to the parameters NODES loaded nodes loaded nodes MERGE MERGE STRING str and NO ELEM OUTPUT The remaining parameters are WATER MASS CEMENT MASS and SCM MASS mass of water cement and non active suplementary cementitious material SCM per Im weight volume CONCRETE COVER thickness of concrete cover layer length default value 0 02m K CO2 efficiency factor with typical values 0 3 for silica fume 0 5 for low calcium fly ash 0 7 for high calcium fly ash effective only for concrete with SCM MASS gt 0 i e not for Portland cement default value 0 5 CO2 content CO2 in the ambient air default 0 00036 RH relative humidity of ambient air RH default 0 6 CL CRIT critical mass of chlorides per mass of SCM cement for initialisation of reinforcement corrosion default 0 014 CS mass of chlorides per mass of SCM cement at surface default 0 103 D REF reference chloride difussivity at TIME D REF length 2 time default 1 e 12m sec TIME D REF ti
185. ated forces BEAM FORCES Nx Vy Vz Kx My Mz beam forces for CCBeam3D element CARBONATION DATA AT s urface name Data about concrete degradation due to carbonation progressing from surface surface name 202 CHLORIDES DATA AT surfa Data about concrete degradation due to chlorides ce name progressing from surface surface name REFERENCE BORDER COO Cummulated geometrical distance of output nodes with RDINATE respect to the previous node This output data is used as the horizontal coordinate for plots of value along some border cutting lines etc Table 131 Output type keywords understood by the command amp OUTPUT for the location type GEOMETRIES Parameters for 3D geometry LAYRED SHELL GEOMETRY Parameters for layered shell geometry e g used by Ahmad degenerated shell element BEAM 3D GEOMETRY Parameters for 3D curved beam element Table 132 Output type keywords understood by the command amp OUTPUT for the location type ELEMENT TYPES Output keyword ELEMENT TYPE List of defined element types Table 133 Output type keywords understood by the command amp OUTPUT for the location type MATERIALS Output keyword MATERIALS List of defined materials with their parameters CURRENT MATERIAL PAR Values of current material parameters for creep analysis like Dirichlet series coefficients material strength in compression etc Table 134 Output type keywords understood b
186. ault value program tries to determine a suitable idealisation based on the dimension of the material model and the dimension of the finite element where it is used So in most cases it is not needed to use this command In certain cases however the program cannot determine correctly the idealisation to use such a case is for instance if a 3D model is to be used in 2D element Then it is necessary to directly specify if plane stress or strain idealisation is to be used 106 DAMPING MASS x Mass and stiffness damping factors specified for indiviual DAMPING STIFF xx element group They overwrite the same factor set for the whole structure by SET command 4 3 2 7 Sub command amp 3DNONLINCEMENTITIOUS2FATIGUE amp 3DNONLINCEMENTITIOUS2FATIGUE TYPE CC3DNonLinCementitious2Fatigue Ex POISSON NY x FT RT F T R T x FC RC F CJR Cjx FCO RCO F_CO R_CO x GF x CRACK SPACING TENSION STIFF x WD x EPS CPx EXCx BETA RHOx ALPHA x FT MULTIP x SHEAR FACTOR UNLOADING BETA FATIGUE x KSI FATIGUE IDEALISATION 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D DAMPING MASS x DAMPING STIFF xx This material is based on the CC3DNONLINCEMENTITIOUS2 material extended for fatigue calculation It has an additional parameter BETA FATIGUE It also has additional data attributes DAMAGE FACTORS FATIGUE BASE STRESS FATIGUE CYCLES TO FAILURE FATIGUE MAX FRACT STRAIN See ATENA theory man
187. ble 101 amp BEAM_MASONRY_MATERIAL sub command parameters Young modulus Units stresses Default value 0 MU x Poisson ratio mE Units none Default value 0 Material density Units mass volume Default value 0 ALPHA x Coefficient of thermal expansion Units 1 T cceptable range 0 maximal real number gt Default value 0 000012 DAMPING MASS x Mass and stiffness damping factors specified for indiviual DAMPING STIFF xx element group They overwrite the same factor set for the whole structure by SET command F Kx Characteristic material compressive strength negative This input is not used if the corresponding design value is given Units stresses Default value 0 VK0x Characteristic material initial shear strength positive This input is not used if the corresponding design value is given Units stresses Default value 0 COEFF F VK x Coefficient for normall stress to calculate F VK Units none Default value 0 4 Characteristic material limit shear strength constant part F VLT CONST x positive Final value is calculated as fy fi const gt ATENA Input File Format 165 where 15 element compression stress This input is not used if the corresponding design value is given Units none Default value 0 F VLT COEFF S O F XK INPLANEx Characteristic material in plane tensile strength in bending positive This input is not used if the corresponding design value is given
188. calculated using the MDF theory by Collins The input parameter represents the maximal size of aggregates used in the concrete material Units 1 Acceptable range lt 0 gt Default value 0 02 fi Unloading factor which controls crack closure stiffness Acceptable range 0 17 0 unloading to origin default unloading direction parallel to the initial elastic stiffness Defines the idealisation if material model with higher dimension is to be used in a finite element with lower dimension For instance in case a 3D model is to be used in 2D configuration Units none Acceptable range 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D Default value program tries to determine a suitable idealisation based on the dimension of the material model and the dimension of the finite element where it is used So in most cases it 15 not needed to use this command In certain cases however the program cannot determine correctly the idealisation to use such a case is for instance if a 3D model is to be used in 2D element Then it is necessary to directly specify if plane stress or strain idealisation is to be used Mass and stiffness damping factors specified for indiviual element group They overwrite the same factor set for the whole structure by SET command 4 3 2 4 Sub command amp 3DNONLINCEMENTITIOUS2VARIABLE amp 3DNONLINCEMENTITIOUS2VARIABLE TYPE CC3DNonLinCementitious2Variable Ex MU POISSON NY x F
189. cement CCSmearedReinf Units none Acceptable range 1 maximal integer gt Default value none PARAM Parameter name from the base material whose values will ATENA Input File Format 161 change based on the thermal loading and provided function The original value of this parameter in the base material is overwritten by the values in the function The base material should not be used in any other combined material as well as a stand alone material Otherwise results are unpredictable PARAMETER name Units none Acceptable range any string Default value none 162 F Id of the previously defined function that defines the FUNCTION id dependence of the given material parameter on thermal loading At each material point this function will define the value of the given material parameter based on the current thermal loading at this material point i e integration point Units none Acceptable range 1 maximal integer Default value none EPS T F id Id of the previously defined function that defines the evolution of thermal strains It should be a function of initial strains based on the total temperature at a given point When this function is defined the alpha parameter for the thermal expansion coefficient in the base material should be set to zero otherwise the thermal expansion is considered two times Units none Acceptable range 1 maximal integer Default value none Activates the total
190. comperessed columns cross section By default it is 1 E g EFF WIDTH FACTOR 0 5 EFF HEIGHT FACTOR Coefficient for buckling height of comperessed columns cross x section By default it is 1 E g EFF HEIGHT FACTOR 0 5 UPDATE BEAM DIR Flag for updating beam s position already during iterations with a load step By default it is updated only at e ach step MAX NUMBER OF ITE Maximum number of iterations for establishing force moment RATIONS FOR REDUC equilibrium Such procedure is needed typically after any of E FORCES n beam s nodal forces moments have been reduced due to material nonlinearity By default 30 iterations are allowed MAX ERROR FOR RE Acceptable relative error for the iteration process described DUCE FORCES x above By default the value 0 01 is used S MIN 5 min S MAX Definition of reinforcement bars in the cross section First s max T MIN t min number of bars 1s read and then for each bar its material area T MAX t max BARS and coordinates are inputed Note that all the values are NUMBER z specified in isoparametric coordinate system i e in MATERIAL n coordinates lt s_min s_max gt for direction of the cross BAR AREA x sectional width and lt t min t_max gt m for height By 56 BAR LOCAL Y x default these intervals are set to lt 1 1 gt which corresponds BAR LOCAL Z x to isoparametric coordtinates If the intervals 0 width lt 0 height gt are use the the bar area
191. concrete An eventual reinforcements should be modeled by CCBeamReinfBarMaterial The material conforms with recommendation given by Eurocode and similar codes for practice The input design strengths overwrite values based on input of characteristic strengths Syntax amp BEAM RC MATERIAL TYPE CCBeamRCMaterial E x MU x RHO x ALPHA x F CK x x INPLANE x F OUTPLANE F x GAMMA CDx F CVDx F INPLANE x F_ OUTPLANE F CTD x EPS CU x EPS_Cx LAMBDA x ETA REL_TOL ITER n EPS SMALL x ALPHA STEP x ALPHA TOL FLEX DRIFT COEFF x SHEAR DRIFT COEFF x STIRRUPS SPACING STIRRUPS_AREA STIRRUPS MATERIAL 7 STIRRUPS Ix STIRRUPS NI 1x STIRRUPS EFFECTIVE DEPTH x STIRRUPS C RD Cx STIRRUPS NI MIN x DAMPING MASS STIFF xx 168 Table 102 RC MATERIAL sub command parameters Parameter Description ALPHA x DAMPING MASS xy DAMPING STIFF xx F CTK INPLANE x OUTPLANE CTK x Young modulus Units stresses Default value 0 Poisson ratio Units none Default value 0 Material density Units mass volume Default value 0 Coefficient of thermal expansion Units 1 T cceptable range 0 maximal real number gt Default value 0 000012 Mass and stiffness damping factors specified for in
192. considered Units none Acceptable range none E value not used CT DAMPING MASS x Mass and stiffness damping factors specified for indiviual DAMPING STIFF xx element group They overwrite the same factor set for the whole structure by SET command Material density Units M P Acceptable range lt 0 maximal real number gt Default value 0 0023 fy f Coefficient of thermal expansion Units 1 T Acceptable range lt 0 maximal real number gt Default value 0 000012 4 3 3 Elastic Plastic materials 4 3 3 1 Sub command amp VON MISES PLASTICITY and amp DRUCKER PRAGER PLASTICITY Syntax amp VON MISES PLASTICITY TYPE CC3DBiLinearSteelVonMises POISSON NY YIELD STRENGTH HARDENING MODULUS x R x K1 x K2 x RHO ALPHA IDEALISATION 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D DAMPING MASS xy DAMPING STIFF xx 120 Table 73 amp VON_MISES_PLASTICITY sub command parameters Parameter Basic Elastic modulus Units 17 Acceptable range 0 maximal real number gt Default value 210 x 10 f f MU POISSON NY Poisson s ratio Units none Acceptable range lt 0 0 5 Default value 0 3 YIELD x Yield strength Units 17 Acceptable range 0 maximal real number gt Default value 200 f f HARDENING x Hardening softening modulus HARDENING MODULUS x Units 17
193. ct to the concrete i e it cannot slip By default if FIXED command is not used it can slip everywhere PRESTRESSED START Similar info as that above PRRESTRESSED START means END BOTH the same as FIXED LEFT etc FUNCTION SLIP 14 of a function by which all the coefficients are multiplied slip function id i e frictioniin frictionconst If not specified no multiplication occurs The functional argument is current total deviator slip FUNCTION LOCATION Id of a function by which all the coefficients are multiplied location function id Le frictionj frictioncons If not specified no multiplication occurs The functional argument is distance between the 1 node and the current node for which the slip parameters are calculated For cables the two current friction values are calculated Srictionconst current frictionconst fs s fd dist and Jrictiontin frictioniin fs s fd dist where 5 5 stands for FUNCTION SLIP and fd dist for FUNCTION LOCATION If a function is not defined a constant value of 1 0 is considered at its place For bar with bond only the first formula is used defining the actual cohesion i e the maximum possible bond stress Ceurrent fricti Ollconst fs s fd dis t is used PERIMETER x Perimeter of the reinforcement This value is used only for CCBarWithBond CCBarWithMemoryBond elements Default x 1 m FRICTION UNLOAD This parameter 15 applicable only for
194. d STRAIN Green Lagrange strains see the same output in the above table ATENA Input File Format 199 SBETA STATE VARIABLES State variables for SBETA material model at element nodes Similar output is available also for other materials See ATENA 2D User s Manual section 2 8 5 9 Results Load step i Nodes Sbeta State Variables for details BOND SLIP Slips along the bar reinforcement with the reinforcement bond model analysis for each material direction material model YIELD CRUSH INFO Yielding crushing status information SOFT HARD PARAMETER Softening hardening parameter EQ PLASTIC STRAIN Equivalent plastic strain The calculation method depends on the used material model ELEMENT CRACK VOLUME Coordinates of shell s volume with cracks Current element initial strain increment total from all loads for the current time step Current element initial total strain total from all loads and all time steps ELEMENT ORIENTATION Element orientation for bricks Ahmad and beam elements Useful especially for checking reference depth vectors of shells and beams ELEM INIT STRESS INCR Current element initial stress increment total from all loads for the current time step TOTAL ELEM INIT STRESS Current element initial total stress total from all loads and all time steps ELEM TEMPERATURE INCR Current element incrementally applied temperatures total from all loads for the current time step ELEM TOTAL TEMPERAT
195. d but load values are a priori zeroised Typically loads are specified as of INCREMENT type and LHS boundary conditions as of FIXED type By default the FIXED type is assumed E g LOAD CASE FIXED 7 5 2 0 8 INCRENENT 3 1 34 10 8 4 6 Output Command Apart from the following tables please see also the ATENA 3D User s Manual section 5 5 Output Data Attributes or the ATENA Studio User s Manual section 4 4 Output Data Attributes for additional information about most of the available output quantities 4 6 1 The Command amp OUTPUT Syntax amp OUTPUT OUTPUT amp OUTPUT TYPE SPLIT MONITOR DATA BY LOCATION UNSPLIT MONITOR DATA BY LOCATION NAME name amp EXPORT IMPORT amp SUPLEMENT MONITOR PRESERVE OUTPUT OPTIONS REMOVE FILE file name MAXIMUM MINIMUM SUMMATION AVERAGE RECORD LENGTH x amp LOCATION TRACK RECORD amp DATA 190 TRACE OFF RECOVERY LUMPED VARIATIONAL NEAREST IP amp OUTPUT TYPE STANDARD MONITOR MONITOR 1 MONITOR 2 MONITORS PLOT PLOT 1 2 EACH ITERATION STEP amp EXPORT IMPORT INTERPOLATE FULL NONE STEP EXPORT DATA CMDS TO filename IMPORT DATA CMDS FROM filename 1 filename 2 filename n amp SUPLEMENT MONITOR SUPLEMENT FROM n ARCHIVES filename 1 filename 2 filename n amp LOCATION LOCATION ELEMENT IPS ELEMENT NODES NODES GLOBAL LOAD CASES
196. d is 50000 so that the first generated element and node will be assigned id 50001 base id ATENA Input File Format 247 a can be set separately for nodes and elements ELEMPROP elem_prop Defines a property that is assigned to each generated finite element During generation of finite elements a selection list called e em prop is automatically generated see command amp SELECTION that contains ids of the generated elements This selection can be later used for e g element load definition etc NODEPROP node_prop ID Defines a property that is assigned to generated finite id element node Its use is similar to elem prop and exact meaning of node prop ids depends on a type of macroelement MACRO ELEM DATA SPEC Macroelement type specific data EXECUTE Forces to generate finite elements immediately By default the generation is postponed up to the time when elements are needed i e typically analysis step execution 4 10 4 2 CClsoMacroElement MACRO ELEM DATA SPEC data CCIsoMacroElement can be used to generate a quadrilateral or hexahedral block of elements Geometry of the block is defined by its corner macronodes see input data THROUGH NODES mnode id of input data common to all macroelements The corner nodes input in exactly the same way as element incidences of quadrilateral or hexahedral finite isoparametric elements e g the same order of input corner ids is assumed Both lin
197. diviual element group They overwrite the same factor set for the whole structure by SET command Characteristic material compressive strength negative This input is not used if the corresponding design value is given Units stresses Default value 0 Characteristic material shear strength positive This input is not used if the corresponding design value is given Units stresses Default value 0 Characteristic material in plane tensile strength in bending positive This input is not used if the corresponding design value is given Units stresses Default value 0 Characteristic material out of plane tensile strength in bending positive This input is not used if the corresponding design value is given Units stresses Default value 0 ATENA Input File Format 169 Partial factor of safety Units none Default value 1 Design material compressive strength negative Units stresses Default value 0 Design material shear strength positive Units stresses Default value 0 F CTD INPLANE x Design material in plane tensile strength in bending positive Units stresses Default value 0 F_CTD_OUTPLANE Design material out off plane tensile strength in bending F_CTD x positive Units stresses Default value 0 EPS CU x Maximum compressive strain at the corners of cross section negative Units none Default value 0 0035 EPS Cx Maximum compressive strain at the centre of cross
198. dof 2 const 1555200 fix T LOAD SIMPLE SELECTION all1 2 dof2 const 1555200 fix T initialisation STEP ID 1 STATIC NAME BCs and load LOAD CASE 1 1 0 EXECUTE OUTPUT LOCATION NODES DATA LIST CURRENT PSI VALUES EXTERNAL FORCES INTERNAL FORCES REACTIONS END ATENA Input File Format 283 break Execute 2nd step to obtain dT dx 2 20 load alternative 1 additional temperature increment induced solely by dT dy LOAD CASE ID 2 NAME LC 2 additional temperature increment total dT dx 40 i e increment at fixed nodes 20 incr of Q already in LC 1 SUPPORT SIMPLE SELECTION all3 8 dof 1 const 0 fix h not all DOFs fixed to avoid case of no structural DOFs SUPPORT SIMPLE NODE 1 DOF 2 VALUE 0 SUPPORT SIMPLE NODE 2 DOF 2 VALUE 0 SUPPORT SIMPLE NODE 3 DOF 2 VALUE 5 SUPPORT SIMPLE NODE 4 DOF 2 VALUE 5 SUPPORT SIMPLE NODE 5 DOF 2 VALUE 10 SUPPORT SIMPLE NODE 6 DOF 2 VALUE 10 SUPPORT SIMPLE NODE 7 DOF 2 VALUE 15 SUPPORT SIMPLE NODE 8 DOF 2 VALUE 15 SUPPORT SIMPLE NODE 9 DOF 2 VALUE 20 SUPPORT SIMPLE NODE 10 DOF 2 VALUE 20 load alternative 2 additional temperature increment induced by dT dy and dQ at the top and bottom LOAD CASE ID 3 NAME LC 2 additional temperature increment total dT dx 40 i e increment at fixed nodes 20 incr of Q already in LC 1 SUPPORT SIMPLE SELECTION all dof 1 const 0 fix h SUPPORT SIMPLE NODE 3 DOF 2 VALUE 5 SUPPORT SIMPLE NODE 4 D
199. dule name ID break id IGNORE HITS n_hits user s string amp BREAK BREAK AT MODULE module name ID break id IGNORE HITS n Aits user s string Break Atena execution at a particular break point break id at module module name after number of hits to ignore hits The parameter module name be CCFEModel 16 CCStructures CCFEModelGenerate If no MODULE is specified the execution terminates at the given break point break id at any module If the parameter IGNORE HITS number of hits to ignore is not specified the execution is terminated at the first approach of the specified break point Several break point ids are recognized but break point ids 1 and 2 are probably the most important The former one is placed at entry of a main execution routine of each Atena s modul Similarly the latter one is located at the exit of that routine Alternatevily this command terminates the input commands stream i e no ID break id was input thereby terminating the execution and optionally displays user s string If the execution is run from a GUI window e g AtenaWin a dialog is displaied before the actual termination break action that gives the user choice to either accept the break or ignore it and continue the analysis Batch analyses are broken unconditionally see the batch exec command line switch The commands BREAK and TERMINATE behave identically the latter one supported only for input compatibility rea
200. e they have 3 displacements and 2 rotations As for material and geometry they use the same data as Ahmad elements defined above Nonlinear shell elements similar to CCIsoShellQuad elements however they have triangular curvilinear shape In each node they have 3 displacements and 2 rotations As for material and geometry they use the same data as Ahmad elements defined above Isoparametric full 3D beam NL elements The element uses quadratic interpolation along its axis so that it can have curvilinear shape The elements are compatible with materials suitable for full 3D analysis i e material good for CCIsoBrick elements As for geometry it uses similar to CCBeamNL CCBeam3DGeometry data 66 Table 54 Element Type and Material Compatibility CCCircumferentialTruss CCIso Triangle CCLine Spring CCPlane Spring CCIDElastIsotropic CCPlaneStressElastIsotropic CCPlaneStrainElastIsotropic CC3DkElastIsotropic CCASymElastIsotropic CC3DBiLinearSteelVonMises CC3DCementitious CC3DNonLinCementitious CC3DNonLinCementitious2 CC3DNonLinCementitious2User CC3DNonLinCementitious2 Variable CCSBETAMaterial CC2DInterface CC3DInterface CCReinforcement CCCyclingReinforcement CCSmearedReinf CCCircumferentialSmearedReinf CCSpringMaterial CC3DDruckerPragerPlasticity CCMaterialWithVariableProperties ee eee e RR E RICE ES S NI E
201. e damage Equivalent to changing the KSI FATIGUE material parameter but can be set separatly for each fatigue load amp CREEP ANALYSIS PARAMS SAMPLE TIMES PER DECADE ndecl RETARD TIMES PER DECADE ndecl retard STOP TIME execution stop time MP METHOD CS METHOD j Table 30 amp CREEP ANALYSIS PARAMS sub command parameters Parameter Description SAMPLE TIMES PER DECADE ndecl Number of integration times per logio of time span Note that this command affects generation of integration sample times by the amp CREEP STEP DEFINITION sub command Hence the ndecl parameter must set before the amp CREEP STEP DEFINITION sub command This parameter defines the number of time steps the program will use to integrate the structural behavior Creep or other nonlinear effects will cause a redistribution of stresses inside the structure In order to properly capture such processes a sufficiently small time steps are needed This time spacing is defined by the number of sample times Its definition depends on the type of the analyzed structure as well as on the choice of time units For typical reinforced concrete structures and for the time unit being a day it is recommended to set this parameter ATENA Input File Format 45 to 2 This will mean that for each load interval longer then 1 day two sub steps will be added For a load that is interval longer then 10 days 4 sub steps will be added For an interval longer
202. e temperature history can also be imported from the associated CCStructuresTransport analysis In this case one has to input IMPORT subcommand If results file name is specified without geometry filename name it means that imported and current models are identical If geometry filename name is specified an interpolation between the two models is executed Note that the IMPORT HISTORY option should be used only if target and reference times are given see REFERENCE TIME ref TARGET TIME 1 target This is because any loading in ATENA is assumed to be of 7 The option ANY is only available in 4 3 1 and older 182 incremental character Hence the TEMPERATURE LOAD is imported as temperature increments betveen the structural conditions at target and reference time Alternatively temperature load increments at element nodes can be input directly using syntax NODE ID node id NODE VALUE node value Note that element node related input is always added to average element temperature load see VALUE x Some material laws are temperature denpent and thus they need info about absolute temperatures rather then temperature increments used e g for element load due the material thermal expansion These are input thru REF VALUE ref x and REF NODE VALUE ref node value in the similar way as temperature increments via VALUE x and NODE VALUE node value Note that from the transport analysis i e using the IMPORT command they are imported automa
203. e to be used for the short term material model See Table 54 for more information about the available material models for this parameter After that the parameters of the short term material will follow amp CCModelB3 DATA CCModelB3 CONCRETE concrete type THICKNESS thick FCYL28 fcyl28 E28 28 HUMIDITY humidity DENSITY density AC ac WC SHAPE ATENA Input File Format 143 FACTOR sfactor WATER AIR STEAM CURING END OF CURING TIME endcuring TOTAL_LOSS total_water_loss LOAD CURRENT TIME time LOSS SHRINKAGE COMPLIANCE measured val y Table 86 amp CCModelB3 sub command parameters Parameter Description CONCRETE Type of concrete Only type 1 and 3 are supported for static and concrete type types 1 4 for transport analysis More information available in the Atena Theory Manual Default value 1 THICKNESS thick Ratio volume m surface area m of cross section For long elements it is approximately cross sectional area m perimeter m Default value 0 0767 m Default value 35100 kPa Short term material Young modulus at 28 days i e inverse compliance at 28 01 days loaded at 28 days kPa Default value calculated from fcy 28 HUMIDITY humidity Ambient relative humidity 0 3 1 Default value 0 780 DENSITY density Concrete density kg m Default value 2125 kg m Default value 7 04 Default value 0 63 SHAPE FACTOR Cross section sh
204. e utilized depending on e g implicit Newton integration for 1 explicit integration for 0 0 etc For good compromise between convergence and possibility of oscillations values about 0 0 85 is recommended ADAMS BASHFORTH Adams Bashforth quadratic temporal integration REFERENCE eta Damping factor W t AV 1 lt 03 1 gt 7 1 set totally un damped analysis Default 1 amp CONVERGENCE CRITERIA ABSOLUTE ERROR RELATIVE ERROR TEMPERATURE ERROR x HUMIDITY ERROR x STEP STOP TEMPERATURE ERROR FACTOR x STEP STOP HUMIDITY ERROR FACTOR x ITER STOP TEMPERATURE ERROR FACTOR x ITER STOP HUMIDITY ERROR FACTOR x NEGLIGIBLE TEMPERATURE x NEGLIGIBLE HUMIDITY x Table 171 amp CONVERGENCE CRITERIA sub command parameters Parameter Description ABSOLUTE ERROR The convergence criteria values are computed using the absolute norm that is using the maximal element of an array in its absolute value The error is then computed by dividing an iterative value with the value cumulated within the whole step RELATIVE ERROR The convergence criteria values are computed using the Euclidean norm The error is then computed by dividing an iterative value with the value cumulated within the whole step TEMPERATURE ERROR x Convergence limit for absolute value of temperature increments Default value is 0 01 E g TEMPERATURE ERROR x HUMIDITY ERROR x Convergence limit for abs
205. ear hierarchical quadratic macroelements are supported i e quadrilateral hexahedral meshed domain can be specified by 4 to 9 8 to 20 macronodes The macroelement is defined the same way as corresponding isoparametric elements As for NODEPROP node prop ID id see input data common to all macroelements the following system for finite nodes identification is used Finite element nodes that coincide with macronodes are given node prop from the corresponding macronodes if available e Finite element nodes located on an edge of the macroelement are given node prop being a concatenation of nodal properties of macronodes defining the edge Both edge s macronodes must have been assigned nodal property string in order to generate nodal property for intermediate finite element nodes e The same concept is applied for nodal properties for elements on the macroelement surface Syntax SHAPE BAR QUAD HEXA DIR dir id DIVISION nr DR drj 1 LINEAR QUADRATIC Table 157 MACRO ELEM DATA SPEC for CClsoMacroElement macro element parameters SHAPE BAR Specifies shape of the macroelement 1D can specify bar 248 QUAD HEXA lt xx x gt shape 2D problems quadrilateral shape and 3D problems can use hexahedral shape akin an isoparametric brick The gt string is so called macroelement type decoration akin isoparametric element types and it specifies what macroelement macronodes are input For
206. eigenmode for which damping parameter ksi val and associated omega KSI val weight factor weight val is input Values for at least 2 WEIGHT weight val eigenmodes must be given By default weight val 1 The keyword CALCUATE marks the end of the input and execute the regression procedure to transform the current input data for structural damping to the above DAMPING MASS and STIFFNESS coefficients Example SET TRANSIENT DAMPING REGRESSION MODE 1 OMEGA 2 KSI 0 002 WEIGHT 0 6 MODE 2 OMEGA 3 KSI 0 03 WEIGHT 0 8 MODE 3 OMEGA 7 KSI 0 04 WEIGHT 1 1 MODE 4 OMEGA 15 KSI 0 1 WEIGHT 0 9 MODE 5 OMEGA 19 KSI 0 14 WEIGHT 0 8 ATENA Input File Format 29 Po CALCULATE amp LINEAR SOLVER TYPE SOLVER LU DSS LLT DSS LDLT JAC GS ILUR DCG ICCG DCGN LUCN DBCG LUBC DCGS LUCS DOMN LUOM DGMR LUGM PARDISO SLAP_ITERATION LIMIT SLAP SAVED VECTOR LIMIT n SOLVER BLOCK SIZE n EXTEND ACCURACY FACTOR PARDISO REQUIRED ACCURACY y MIN LHS BCS MASTER NODE COEFF n Table 9 amp LINEAR SOLVER TYPE sub command parameters Parameter Description SOLVER LU Type of solver for computing linear problem Ax y It can be DSS LLT DSS LDLT either a direct skyline storage solver i e LU or direct sparse JAC GS ILUR DCG storage solver i e 055 DSS LDLT or iterative sparse DCGN LUCN storage solver i e the remaining types Alternatively it can be DBCG
207. ement s centre point coordinates and COEFF X coeff x COEFF Y coeff y COEFF Z coeff z see Table 110 By default coeff 0 coeff 0 coeff 2 0 and const 1 If only GROUP group id is given and ELEMENT element id is omitted then the load applies to all element of the specified element group An exception to that is prestressing of external cable This load is always applied in element id 1 and only once if element id is not specified Different values of element initial stress and strain can be applied at each material i e integration point see IP ip id input If ip id 0 the element load is applied into all material points Hence with ip id 0 the user can specify uniform portion of a load across the element and then he can define the load deviation at a particular material point ip id By default ip id 0 amp SPRING DEFINITION SPRING DIRECTION 1 x ncooras NODE n MATERIAL n Table 113 amp SPRING DEFINITION sub command parameters Parameter Description DIRECTION x ncoords Spring direction E g DIRECTION x x x3 Component x is valid only in 3D problems Positive internal spring force acts in the direction given by this vector NODE n Node number in which the spring is applied MATERIAL n Spring stiffness material id ATENA Input File Format 185 Table 114 Other parameters for command amp LOAD Load case identification NAME load case name Load case name in quotes also
208. ent33L 3D shell elements The first and the second digits in the CC AhmadElement32L element name specify number of integration points for element bending and shear energy E g the digit three says that the CCAhmadElement33H element is integrated in 3 IPs in X dir 3 IPs in Y dir CCAhmadElement32H number of layers The last letter L H and S stands for 9 nodes Lagrangian element for 9 nodes Heterosis element and 8 CCAhmadElement228 nodes Serendipity element See theoretical manual for more details All the element must use a 3D material and LayeredShell geometry They specified by 16 nodes 8 for top and 8 for bottom surface similar to brick elements The top and bottom middle points for Lagrangian and Heterosis elements for the bubble functions are generated automatically At each node the elements have 3 degree of freedom As top and bottom node have altogether 6 DOFs and shell theory uses only 5 DOFs per shell node the z displacement of the bottom node is automatically constrained during the execution CCBeamNL 3D nonlinear beam element The element uses quadratic interpolation along its axis so that it can have curvilinear ATENA Input File Format CCBeam CCIsoBeamBar lt xx gt CCIsoBeamBar lt xxx gt CCIsoShellBrick xxxxxxx X gt CCIsoShellBrick lt xxxxxxx XXXXXXXXXXX CCIsoShellWedge lt xxxxx gt CCIsoShellWedge lt xxxxx XXXXXXX CCIsoShellQuad lt xxxx gt CCIsoShellQuad lt xxxxxxx gt CCI
209. esponding value in the base material Othewise the value in the base material remains unchanged Default value 0 MPa E28 E Short term material Young modulus at 28 days ie inverse compliance at 28 01 days loaded at 28 days kPa It is used by the creep model to predict material compliance t t If unspecified the model calculates its value based on fcy 28 Default value calculated from fcy 28 ALPHA Coefficient of thermal expansion to be used for calculation AT within the creep material Default value 0 HUMIDITY humidity Ambient relative humidity 0 3 1 Default value 0 780 DENSITY density Concrete density kg m Default value 2125 kg m Default value 7 04 Default value 0 63 SHAPE FACTOR Cross section shape factor It should be 1 1 15 1 25 1 3 1 55 sfactor for slab cylinder square prism sphere cube respectively Default value 1 25 WATER AIR conditions either under in water or air under normal STEAM CURING temperature conditions WATER AIR or steam condition 5 Default value AIR END OF CURING Time at beginning of drying i e end of curing days HIME endcunng Default value 7 days TOTAL LOSS Total water loss at zero humidity and infinite time total water loss Default 0 kg 146 LOAD CURRENT Current or load time for the subsequent measured value CINE IE Default 0 days LOSS SHRINKAGE Measured wa
210. eywords understood by the command amp OUTPUT for the location type NODES Output keyword TRANSPORT CONVERGENC Parameters for assessing convergence performance of E CRITERIA the transport analysis ATENA Input File Format 275 5 SAMPLE INPUT FILE 5 1 Input file for a sample static analysis Sample analysis Analysis of a simple 2D wall comprising quadrilateral and triangle elements subject to displacement load at nodes 600 and 700 Nodal pairs 300 800 and 200 500 are constrained to have the same displacements The analysis has several dummy entities in order to test deletion process in ATENA input file y 300 400 800 700 n d LL RR gt 3 33e 6 function 20 20 10 A 15 x 3 33e 6 gt function 20 x gt DUST OPENS ORC E Sec She et seeps et Se mes le mass ihn See ts eS oo se a Saas Sm Ss so EE SEN 100 200 600 50 500 x By Testing input data format TASK name Test TITLE Test MASTER SLAVE DIMENSION 2 Coordinate definition JOINT COORDINATES 50 0 0 dummy object for deletion checking 276 oO OOOO OO cC OOO OO 0 oO OOOO OO V V V V V V V V 1 PO ES Material definition MATERIAL ID 71 NAME Steel TYPE CCPlaneStressElastIsotropic E 210000 mu 0 2 rho 0 0023 alpha 1 2e 5 MATERIAL ID 70 NAME Steel
211. fault value 0 10 f Generation formula none Strain value after which the softening hardening becomes localized and therefore adjustment based on element size is needed Format X LOC COMP x Units none Acceptable range lt 0 maximal real number gt Default value 0 001 Generation formula FC E ATENA Input File Format FC REDUCTION FUNCTION n 95 Index of the function defining the compressive strength reduction due to cracking The horizontal axis represents fracturing strains normal to a crack and vertical axis compressive strength which should be normalized with respect to f Format FC REDUCTION FUNCTION n Units none Acceptable range lt 1 maximal int number Default value none Generation formula default function should have the following points 0 000 1 0 0 001 21 0 0 005 0 6 0 01 0 4 0 015 0 3 0 05 0 30 96 Shear properties SHEAR STIFF FUNCTION X LOC SHEAR Index of the function defining the shear retention factor evolution based on tensile strain in the crack direction The horizontal axis represents strains and the vertical axis the relative reduction of the shear modulus Format SHEAR STIFF FUNCTION n Units none Acceptable range 1 maximal int number Default value none Generation formula default function should have the following points 0 00000 1 00 1 e 7 1 00 1 e 6 0 79 1 e 5 0 58 0 00010 0 36 0 001 20 15
212. fcyl28 E28 e28 HUMIDITY humidity END OF CURING TIME endcuring LOAD CURRENT TIME time SHRINKAGE measured val Table 92 amp CCModelCEB FIP78 sub command parameters Parameter Description 154 THICKNESS thick Ratio volume m surface area m of cross section For long elements it is approximately cross sectional area m perimeter m Default value 0 0767 m FCYL28 fcyl28 Cylindrical material strength in compression kPa Default value 35100 kPa E28 e28 Short term material Young modulus at 28 days ie inverse compliance at 28 01 days loaded at 28 days kPa Default value calculated from fcy 28 HUMIDITY humidity Ambient relative humidity 0 3 1 Default value 0 780 END OF CURING Time at beginning of drying i e end of curing days TIME endcuring Default value 7 days LOAD CURRENT Current or load time for the subsequent measured value TIME time Default 0 days SHRINKAGE Measured at current humidity shrinkage measured val for measured val previously specified load and current time Unit of shrinkage is dimension less amp CCModelCSN731202 DATA CCModelCSN731202 CONCRETE concrete type THICKNESS thick FCYL28 fcyl28 E28 e28 HUMIDITY humidity END OF CURING TIME endcuring LOAD CURRENT TIME time SHRINKAGE measured val HISTORY TIME time HUMIDITY humid TEMPERATURE temper y Table 93 amp CCModelCSN731202 sub comma
213. for identification E g NAME load case name MASTER NODE n List of master nodes their degrees of freedom and DOF i x multipliers E g MASTER NODE n DOF i f NODE m DOF i f SLAVE NODE n DOF List of slave nodes and their degrees of freedom They are ordered according to MASTER E g SLAVE NODE n DOF d NODE n DOF d VALUE x Prescribed nodal value either displacement or force depending on context E g VALUE x MASTER SLAVE Ids of master slave nodal pairs NODAL PAIRS n 3 P g MASTER SLAVE NODAL PAIRS n ij n2 i3 Ni lj NODE n DOF n Node and its DOF specifying a place where the simple boundary condition is applied FUNCTION n Id of time function applied atop of a specified boundary condition E g FUNCTION n X Y Z DOF idof Element body load components in reference coordinate system in force per volume unit If DOF idof is used the specified value applies to a DOF idof E g X VALUE x Y VALUE x Z VALUE x TEMPERATURE Element temperature in deg STRAIN X Y Z XY Component of element initial strain components in YX YZ ZY XZ ZX reference coordinates system STRESS X Y Z XY Component of element initial stress components in YX YZ ZY XZ ZX reference coordinates system GROUP ELEMENT Group and element ids where the ELEMENT LOAD is applied 186 amp RIGID BODY RIGID BO
214. ge lt minimal real number FT 2 Default value 20 f f Generation formula FT 2 1 Critical compressive displacement Units 1 Acceptable range lt 0 maximal real number gt Default value 0 0005 oa CC Miscellaneous 1 EXC x Eccentricity defining the shape of the failure surface Units Acceptable range lt 0 5 1 0 gt Default value 0 52 BETA x Multiplier for the direction of the plastic flow Units Acceptable range lt minimal real number maximal real number gt Recommended range 2 2 Default value 0 0 RHO x Material density Units M P Acceptable range lt 0 maximal real number gt Default value 0 0023 f f ALPHA x Coefficient of thermal expansion Acceptable range lt 0 maximal real number gt Default value 0 000012 Units none 82 Acceptable range lt 0 gt Default value 0 25 FT MULTIP SHEAR FACTOR x UNLOADING x IDEALISATION DAMPING MASS xy DAMPING STIFF xx Multiplier for tensile strength in the plastic part of the fracture plastic model in order to ensure that plastic surface and fracture surface intersect each other Units none Acceptable range lt 0 gt Default value 2 1 Shear factor that is used for the calculation of cracking shear stiffness It is calculated as a multiple of the corresponding minimal normal crack stiffness that is based on the tensile softening law Units none Acceptable range lt 0 gt Default value 20 Unloadi
215. h global nodes where each entry must be incidented by a element with group _id gt grouip_id from group _id lt group id to ACTIVE INACTIVE GROUP Make active or inactive all elements contained in the group id selection list that belongs to the group group id ENFORCED DELETE Delete elements contained in the selection list that GROUP group id JOINT belongs to the group group id or delete nodes contained in the selection list 22 If ENFORCED is not specified all references to a deleted entity remain valid even after the deletion thereby it is possible later to re input the entity with new data Otherwise the entity and all references to it get unconditionally removed Example SELECTION all nodes FROM 1 TO 22 SELECTION source LIST 123456 SELECTION dest LIST 3 5 12 SELECTION source INSERT dest SELECTION source REMOVE dest SELECTION source REMOVE SELECTION source GENERATE ELEMENTS GROUP 1 WITHIN BOX 101 102 103 104 106 107 108 3D case SELECTION source GENERATE NODES WITHIN BOX MACRO NODES 101 102 103 104 2D case SELECTION source GENERATE NODES WITHIN DISTANCE 2 4 FROM POINT MACRO NODES 101 SELECTION source GENERATE NODES WITHIN DISTANCE 2 4 FROM LINE MACRO NODES 101 102 SELECTION source GENERATE NODES WITHIN DISTANCE 2 4 FROM PLANE MACRO NODES 101 102 103 GENERATE SELECTION source GENERATE NODE NEAREST MACRO NODE 101 GENERATE SELECTION nodes GENERAT
216. he current iteration to direction of the previous iteration It is linearized form of EXPLICIT ORTHOGONAL method EXPLICIT ORTHOGONAL Keeps constant step length Unlike CRISFIELD method it is based on goniometric relationships thus avoiding solving quadratic equation and difficulty with picking the correct root From the mechanical point of view it poses identical constraint as CRISFIELD method amp CONSTRAINT LENGTH CONTROL amp ARC LENGTH BASE STEP LENGTH LENGTH OPTIMISATION Table 19 amp CONSTRAINT LENGTH CONTROL sub command parameters amp ARC LENGTH BASE STEP LENGTH Set base step length amp ARC LENGTH OPTIMISATION Set the way how to optimize step length in the current step based on base step length and convergence performance in the previous step The base step length is defined by amp ARC LENGTH BASE STEP LENGTH and by default it corresponds to step length in the previous step amp ARC LENGTH BASE STEP LENGTH 38 LENGTH PREVIOUS STEP LENGTH ARC LENGTH RESET STEP LENGTH STEP LENGTH x STEP LENGTH ONCE x REL STEP LENGTH x REL STEP LENGTH ONCE x REL REF STEP LENGTH x REL REF STEP LENGTH ONCE x DLAMBDA MIN DLAMBDA x REF DLAMBDA MIN DLAMBDA MAX x MIN STEP LENGTH x MAX STEP LENGTH MIN REL STEP LENGTH x MAX REL STEP LENGTH x MIN REL REF STEP LENGTH x MAX REL REF STEP LENGTH x Table 20 LENGTH BASE STEP LENGTH
217. he factors are those used for scaling solid heights and widths CS WIDTH EQN Width and height of beam s cross section Both are given in eqn expression terms of algebraic expression f x y z in which the CS HEIGHT EQN parameters x y z i e coordinates are substituted eqn_expression automatically based on location a beam using this geometry Example CS WIDTH EQN 0 540 1 x CS HEIGHT EQN 0 1 VT X EQN Algebraic expressions for x y z coordinates of the vector vt eqn expression Theey are input in similar way to the above cross section s VT Y EQN dimensions eqn expression Example VEARUN VT X EQN 0 VT_Y_EQN 0 VT_Z_EQN 0 3 eqn expression NUMBER OF IPS IN R Number of integration points in beam s longitudinal axis By n default 2 IPs are used however especially in case of heavy material nonlinearity more IPs may yield more accurate results as the beam can better locate a material failure Max value is 6 REDUCE TAU XY Reduce shears by the factor 0 85 REDUCE TAU XZ FULL TAU 4 2 4 command amp ELEMENT Syntax amp ELEMENT ELEMENT amp ELEMENT GROUP amp ELEMENT TYPE amp ELEMENT INCIDENCES amp ELEMENT MATERIALS Table 50 amp ELEMENT command parameters Parameter Description amp ELEMENT GROUP This sub command begins the definition of a new element group This command should be followed by the definition of element connectivity by using the sub command ELEMENT INCIDENCES
218. his formula is valid only if is compressive cube strength given as positive number in MPa MU POISSON NY Poisson s ratio Format MU x Units none Acceptable range lt 0 0 5 Default value 0 2 FT RT F_T R_T Tensile strength Format FT x Units 17 Acceptable range 0 maximal real number gt Default value 3 f f 2 Generation formula FT 0 2452 f f 92 FC RC F C R C UNLOADING x Tensile properties TENSION SOFT HARD FUNCTION CHAR SIZE TENSION Compressive strength Format FC x Units 17 Acceptable range minimal real number 0 Default value 30 f f Generation formula FC 0 85 R frl f Unloading factor which controls crack closure stiffness Acceptable range 0 17 0 unloading to origin default unloading direction parallel to the initial elastic stiffness Index of the function defining the tensile hardening softening law The horizontal axis represents strains and vertical axis tensile strength which should be normalized with respect to f Format TENSION SOFT HARD FUNCTION 7 Units none Acceptable range lt 1 maximal int number Default value none Generation formula default function should have the following points 0 000 1 00 0 75 0 03 f 5 G FE 10 00 0 03 f 70 25 where GF 0 000025 FT Characteristic size for which the various tensile functions are valid Format CHAR SIZE TENSION x Units
219. his means that the program converts the default value to the selected unit set The conversion is done with the help of the following factors whose value depends on the selected units Unit type Unit type Supported units description Table 35 Value of factor f for the conversion of force default values 1 000 000 ETA 224809 024733489 Table 36 Value of factor f for the conversion of length default values Faktor f 1 000 000 1000 1 145 037680789469 0 145037680789469 4 2 Topology Definition 4 2 1 The Command amp JOINT This command adds new finite element joints to the model Syntax amp JOINT JOINT amp COORDINATES SPEC j amp COORDINATES SPEC COORDINATES ID n NCOORDS X ncoords Table 38 amp JOINT command parameters This command is used to set model joint coordinates Each joint coordinate should be on a separate line e g ID n X X X2 X3 If ncoords is not specified it is by default equal to problem dimension see amp TASK 4 2 2 Command amp LOCAL This command specifies list of finite element joints whose degree of freedom should be treated in element local coordinate system ATENA Input File Format 49 Syntax amp LOCAL LOCAL DOFS JOINTS n j Table 39 amp LOCAL command parameters Parameter Description LOCAL DOFS JOINTS List of nodes with local degree of freedom E g LOCAL DOFS JOINTS
220. i dono UE EE 114 118 CURING143 144 145 148 151 152 153 154 155 156 157 CURRENT27 28 143 144 146 148 149 151 152 153 154 155 156 157 174 176 195 197 199 200 201 202 207 216 268 274 280 282 284 CURVE ite eue 237 238 DY CLIN Gries 72 73 127 128 DAMPING 27 28 51 53 207 208 209 217 DATAII 27 142 144 146 149 151 152 153 154 155 156 187 189 190 192 193 195 202 203 217 246 247 248 249 250 251 252 253 277 278 282 284 DEF VERTEX FMT FOR NODES242 243 244 DELETE12 13 18 21 61 228 241 244 246 277 DENSITY 142 143 144 145 146 148 149 150 151 152 153 DIMENSJON iersinii irii 15 275 280 DIR 53 54 53 55 50 130 180 184 198 DISPLACEMENT33 34 36 37 40 173 174 175 176 186 237 269 270 DISPLACEMENTS 30 197 200 217 DOE cien 41 178 179 180 185 283 284 DOES 49 DRUCKER 72 73 119 121 122 E eine 36 190 191 194 217 ELASTIC zanin rere ne 35 725 75 ELASTIC 22 2 222 35 ELEMENT11 12 13 18 20 21 43 44 45 46 56 60 61 62 68 69 70 173 174 178 179 180 185 190 193 197 198 199 202 203 211 213 214 221 224 228 237 241 245 246 248 249 250 251 252 253
221. ial for reinforcement bar used in solids EINF BAR MATERIAL modeled by either BEAM RC MATERIAL or BEAM MASONRY MATERIAL material 4 3 1 Linear Elastic Isotropic Materials 4 3 1 1 Sub command amp LINEAR ELASTIC ISOTROPIC Syntax amp LINEAR ELASTIC ISOTROPIC TYPE CC1DElastIsotropic CCPlaneStressElastIsotropic CCPlaneStrainElastIsotropic CCASymkElastIsotropic CC3DElastIsotropic E x MU NY POISSON x RHOx ALPHA x IDEALISATION 7 ID PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D SHELL BEAM 3D MEMBRANE AXI DAMPING MASS xy DAMPING STIFF xx Table 63 amp LINEAR_ELASTIC_ISOTROPIC sub command parameters Parameter Basic Ingres 200001 Ex Elastic modulus Units F 1 Acceptable range 0 maximal real number gt Default value 210 x 10 f f MU POISSON NY Poisson s ratio Units none Acceptable range 0 0 5 mo RN value 0 3 Miscellaneous RHO x Material density Units M P Acceptable range lt 0 maximal real number gt Default value 0 00785 f f Coefficient of thermal expansion Units 1 T Acceptable range lt 0 maximal real number gt 76 Default value 0 000012 DAMPING MASS x Mass and stiffness damping factors specified for indiviual DAMPING STIFF xx element group They overwrite the same factor set for the whole structure by SET command IDEALISATION Defines the idealisation if material model with
222. ic analysis SET NUMBER OF EIGENVALS 5 SET MAX EIGENVAL ERROR 0 0001 SET MAX NUMBER OF SSPACE ITERATIONS 14 SET REQUEST STURM SEQUENCE CHECK YES SET MAX NUMBER OF JACOBI ITERATIONS 10 SET NUMBER OF PROJ VECS 15 SET solver ICCG SET Optimize width Sloan 225 226 Executing EIGENVECTORS LOAD CASE 1 1 0 STEP ID 1 STATIC NAME BCs and load LOAD CASE 1 1 0 EXECUTE end of file 4 9 Miscellaneous Commands 4 9 1 The Command amp FUNCTION This command defines an x y relationship that can be referred to by other commands when a law or function needs to be specified Syntax amp FUNCTION FUNCTION ID n NAME name TYPE amp function type amp FUNCTION DEFINITION OUTPUT X OUTPUT Y OUTPUT INTEGRATE Y OUTPUT DERIVATE Y OUTPUT NONE j MIN VAL X min val VAL X val VAL X incr val OUTPUT SUFFIX suffix string 1 Currently the following function types are supported amp function type t CCMultiLinearFunction amp FUNCTION DEFINITION XVALUES x YVALUES y 4 amp function type CCAnalyticFunction amp FUNCTION DEFINITION Y y string X MIN x min X MAXx max DX where y string contains string with agebraic expression of argument x x min x max is min max value of x dx is used to calulate numerical integral or derivative of the function By default dx 1 E 5 1 20 Exa
223. ic fracture energy Units Acceptable range 0 maximal real number gt 116 i Generation formula GF 0 000025 FT Clx Softening parameter 1 Hidden Softening parameter 2 Hidden C3 x Softening parameter 3 Hidden Case ISOFT 2 0 Linear Specific fracture energy Units F l Acceptable range 0 maximal real number gt Generation formula GF 0 000025 FT Hidden Hidden C3 x Softening parameter 3 Hidden Case ISOFT 3 0 Local strain Hidden Hidden Hidden Softening parameter 3 Units none Generation formula for minimum value C30 FT E Acceptable range lt C30 maximal real number gt Default value C30 GF x Specific fracture energy Units Acceptable range 0 maximal real number gt ATENA Input File Format 117 Generation formula GF 0 00125 FT Softening parameter 1 Units none Acceptable range lt 0 2 gt Default value 1 1 C2x Softening parameter 2 Units none Acceptable range lt 0 1 gt Default value 0 Softening parameter 3 Hidden GF x Specific fracture energy Hidden Softening parameter 1 Units none Acceptable range lt 0 2 gt Default value 1 Softening parameter 2 Units none Acceptable range lt 0 1 gt Default value 0 Softening parameter 3 Units none Generation formula for minimum value C30 FT E Acceptable range lt C30 maximal real number gt Default value C30 Compression Compressive strain at compressive strength in the
224. icients are zero K TEMP GRAV x i except k TEMP Default value K TEMP 2 1 W C m C TEMP Hx Coefficients defining heat material capacity The cup p oh c ew c ET Cro see the Ot Tw 0 gt ATENA Theoretical manual Usually all these coefficients are zero except c C TEMP W x LHS Zia zd Default value TEMP TEMP 2 55E6 J m 3 C TEMP FNC ID x K TEMP TEMP FNC ID x TEMP W ID K TEMP GRAV FNC ID x C TEMP H FNC ID x C TEMP TEMP FNC ID x C TEMP W FNC ID x All the above heat flux and capacity coefficients are constant with respect to state variables 1 e humidity and temperature but can vary in time This is achieved by multiplying each of the above parameters by a time function Ids of such a function are specified here The whole concept is similar to time varying boundary conditions parameters for material models in static etc The time functions themselves are given by amp FUNCTION Table 163 amp Parameters of the amp CCTransportMaterial within the transport analysis Input parameters for user defined constitutive law for flow governing equations Heat oW div q t 4 Ce TO T div K grad h K grad T grad w E Moisture OO div q wh a Ea C 24 En F div D grad h grad T D
225. ies GF x Specific fracture energy Units F l Acceptable range 0 maximal real number gt Default value 0 0001 f f Generation formula GF 0 000025 FT CRACK SPACING x Crack spacing average distance between cracks after localization If zero crack spacing is assumed to be equal to finite element size Units Acceptable range 0 maximal real number Default value 0 0 TENSION STIFF x Tension stiffening Units none Acceptable range 0 1 gt 52 value 0 0 000411 properties EPS CP x Plastic strain at compressive strength Units none Acceptable range lt minimal real number 0 gt Default value 0 001 Generation formula FC E FCO F CO RCO Onset of non linear behavior in compression RCo pe Units 17 Acceptable range lt minimal real number FT 2 Default value 20 f f Generation formula FC 2 3 WDx Critical compressive displacement Units 1 Acceptable range 0 maximal real number Default value 0 0005 fi FC REDUCTION x Reduction of compressive strength due to cracking When cracking occurs depending on the tensile fracturing strain the ATENA Input File Format 85 compressive strength of the material is reduced using the formula from the modified compression field theory by Collins The parameter of this command is the limiting relative value of the compressive strength reduction Units none Acceptable range lt 0 1 gt ee RR 71 value 0 2 Miscellaneous
226. ies that can be later plotted in Atena 2D graph window Example 200 Create output series x and I ydx for a multilinear function id 500 note that the function must be defined beforehand The new output data 500 X REDEFINED and 500 INTEGRATE Y REDEFINED are created by command FUNCTION id 500 MIN VAL 0 MAX VAL X 200 INCR VAL X 10 OUTPUT SUFFIX REDEFINED OUTPUT X OUTPUT INTEGRATE Y The series can be plotted using commands OUTPUT PLOT 2 NAME new plot 500 X EACH STEP LOCATION OUTPUT DATA DATA LIST 500 X REDEFINED END OUTPUT PLOT 2 NAME new plotl fac 500 INTEGRATE Y EACH STEP LOCATION OUTPUT DATA DATA LIST FNC 500 INTEGRATE Y REDEFINED Note that in order to visualize these plots using Atena s Graph Series dialog don t forget to check the Values profile for fixed time checkbox and set horizontal and vertical fixed time to zero see description of the PLOT output option 228 4 9 2 Command amp PRE CRACKy Syntax PRE CRACK ELEMENT GROUP n ELEMENT n INTEGRATION POINT x NORMAL X X2 x3 Table 143 amp PRE CRACK command parameters Parameter Description ELEMENT GROUP n Element group id in which the pre defined crack is to be inserted ELEMENT n Element id in which the pre defined crack 1s to be inserted INTEGRATION Integration point id in which the pre defined crack is to be JOINT n inserted This is an optional parameter
227. if it is not specified crack is inserted into all integration points NORMAL x x2 x3 Crack normal direction 4 9 3 The Command amp DELETE Syntax amp DELETE DELETE ENFORCED ELEMENT GROUP ID n ELEMENT ID TYPE ID GEOMETRY ID 7 JOINT ID n LOAD CASE ID MATERIAL ID STEP ID FUNCTION ID n Table 144 amp DELETE command parameters Parameter Description Delete element group from the model or a single element from the specified element group E g ELEMENT GROUP 3 ELEMENT 4 E g ELEMENT TYPE 2 E g GEOMETRY 6 E g JOINT 3 E g LOAD CASE 4 MATERIAL Delete material from the list of material types E g MATERIAL 20 STEP Delete step n from the model ATENA Input File Format 229 Pg STEP 4 FUNCTION Delete function from the model E g FUNCTION 5 ENFORCED If not specified all references to a deleted entity remain valid even after the deletion thereby it is possible later to re input the entity with new data Otherwise the entity and all references to it get unconditionally removed 4 9 4 The Command amp INPUT Syntax amp INPUT INPUT FILE file Table 145 amp INPUT FILE sub command parameters The command specifies the name of the input file Following this command the ATENA input stream will be redirected into this file E g INPUT FILE file 4 9 5 The Command amp MESSAGE Syntax amp
228. ing from 0 0 and only positive values should be specified Same relationship will be used in compression Units none Acceptable range 1 maximal integer Default value none see command amp FUNCTION Material density Units M P Acceptable range 0 maximal real number Default value 0 00785 f f Coefficient of thermal expansion Units 1 T Acceptable range 0 maximal real number Default value 0 000012 Function multiplier Can be used to scale the function defining the stress strain relationship Units none Acceptable range 1 maximal real number Default value 1 0 Compression flag Can be used to deactivate the compressive response of the reinforcement 0 reinforcement cannot carry any compressive forces but only tensile 1 reinforcement works both in tension and compression Units none Acceptable range 0 or 1 Default value 1 amp REINFORCEMENT WITH CYCLING BEHAVIOR TYPE CCCyclingReinforcement FUNCTION n Table 78 amp REINFORCEMENT WITH CYCLING BEHAVIOR sub command parameters Parameter Description ATENA Input File Format 129 Basic properties Ex Elastic modulus Units 17 Acceptable range 0 maximal real number gt Default value 210 x 10 MPa FUNCTION n Function which defines uniaxial stress strain relationship Relationship should be defined as a set of points starting from 0 0 and only positive values should be specified Same relati
229. ion 7 of the preconditioned Krylow the stopping criterion lt With inv LU and Subspace iteration If the problem matrix is symmetric positive definite e g for static analysis the same applies but CG iteration replaces the computation of LU Example SET PARDISO REQUIRED ACCURACY limit 0 00000001 Default 0 MIN LHS BCS MAST Set accuracy in its abs value used to assemble and process lhs NODE COEFF n boundary conditions particularly master nodes coefficients If the specified value is too high although the solution is faster and needs less RAM it can filter out some important relations within the boundary conditions On the other hand if the value is too small the solution is slower and needs more RAM In addition it need not detect and eliminate all redundancies within the boundary conditions and can fail Note that the effect of this solution parameter can be inspected in Global matrix LHS BCs ATENA Input File Format statistics printed in ATENA output file Example SET MIN LHS BCS MASTER NODE _ COEFF 1 5 Default 1 e 6 31 Table 10 SOLVER TYPES Temporary memory Description required LU D S NS For smaller or ill posed problems JAC I ssds sir SNS 4 11 8 1 4 Simple not recommended GS I sir S NS 4 11 nel nt 1 8 1 3 n nel ILUR ssilus sir SNS 4 13 4
230. iously defined material which is to be used a one component of the combined composite material Units none Acceptable range 1 maximal integer Default value none Relative contribution of this material to the overall behavior of the combined composite material Units none Acceptable range lt 0 maximal real number Default value 1 0 ATENA Input File Format 159 4 3 11 Material Type for Material with Variable Properties 4 3 11 1 Sub command amp VARIABLE MATERIAL Syntax amp VARIABLE MATERIAL TYPE CCMaterialWithVariableProperties BASE id PARAM namel 1 PARAM 2 id2 PARAM 3 id3 Table 98 amp VARIABLE_MATERIAL sub command parameters Parameter Description Basic properties BASE id Id of the previously defined base material whose parameters will be modified based on the provided functions Only the following base materials should be used as a base one CC3DnonLinCementitious2 CC1DElastIstotropic CCPlaneStressElastIsotropic CCPlaneStrainElastIsotropic CC3DelastlIsotropic CCASymkblastlIsotropic CC3DDruckerPragerPlasticity CC3DBiLinearSteel VonMises CCReinforcement CCSmearedReinf Units none Acceptable range 1 maximal integer gt Default value none PARAM Parameter name from the base material whose values will change based on the provided function The original value of this parameter in the base material is overwritten by the values in
231. is A cantilever modelled by 4 nonlinear shells Cross sectional dimension width height 1 length 40 Exact solution see cAAtenaExamples Examples Dynamics SpringWithLumpedMass Eigenvalues cantilever mw s 1 0 0443Hz f2 0 278Hz f3 0 775Hz Calculated ATENA Input File Format 1 0 0445Hz 2 0 299Hz 3 0 945Hz TASK name Test Ahmad elems dimension 3 MATERIAL id 1 name Spring type CC3DElastIsotropic E 30000000 Mu 0 00 Rho 156 Alpha 1 200E 05 ELEMENT TYPE id 1 name 1D Truss type CCAhmadElement33L9 221 222 GEOMETRY ID 1 Name Spring TYPE LayeredShell SOLID LAYER 1 LAYER 2 LAYER 3 LAYER 4 LAYER 5 LAYER 6 LAYER 7 LAYER 8 LAYER 9 MATERIAL 1 THICKNESS 0 2 MATERIAL 1 THICKNESS 0 2 MATERIAL 1 THICKNESS 0 2 MATERIAL 1 THICKNESS 0 2 MATERIAL 1 THICKNESS 0 2 MATERIAL 1 THICKNESS 0 2 MATERIAL 1 THICKNESS 0 2 MATERIAL 1 THICKNESS 0 2 MATERIAL 1 THICKNESS 0 2 LAYER 10 MATERIAL 1 THICKNESS 0 2 JOINT COORDINATES 1 00 0e 000 0 00e 000 1 0000000 2 00 0e 000 0 5000000 1 0000000 3 00 0e 000 1 0000000 1 0000000 4 00 0e 000 0 00e 000 0 5000000 5 00 0e 000 1 0000000 0 5000000 6 00 0e 000 0 00e 000 0 00e 000 7 00 0e 000 0 5000000 0 00e 000 8 00 0e 000 1 0000000 0 00e 000 9 05 000000 0 00e 000 1 0000000 10 05 000000 1 0000000 1 0000000 11 05 000000 0 00e 000 0 00e 000 12 05 000000 1 0000000 0 00e 000 13 10 000000 0
232. l area m perimeter m Default value 0 0767 m FCYL28 f Cylindrical material strength in compression f 28 days This 150 FCYLO 28 f GF28 FT28 7 E28 ALPHA HUMIDITY humidity value is crucial for the creep model s prediction i e prediction of material compliance 1 1 and cylindrical compression strength f f shrinkage etc The ratio of f f 28 days js Jis es Note that material may be used for overiding short f compliance rigidity is overwritten always Default value 35100 kPa The parameter f 28days If specified by a positive value this value is used to calculate f and overide the corresponding value in the base material If it is specified as any negative value f 28days is calculated by FIB MC2010 based on f 28 days Othewise the value in the base material remains unchanged Default value 0 MPa The parameter fracture energy G 28days If specified by a positive value this value is to calculate G f and overide the corresponding value in the base material If it is specified as any negative value G 28days is calculated by FIB 2010 based on f 28 days Othewise the value in the base material remains unchanged Default value 0 MPa The parameter tensile strength f 28days If specified by a positive value this value is used to calculate f t and overide the corresponding value in the base material If i
233. lculation phase for the analysis step 0 nothing to do with fatigue store base stress 2 reset FATIGUE FRACT STRAIN 4 calculate fatigue damage induced by FATIGUE CYCLES load cycles The calculated damage is added to FATIGUE MAX FRACT STRAIN 8 apply the fatigue damage stored in FATIGUE MAX FRACT STRAIN multiplied by FATIGUE MAX FRACT STRAIN MULT To combine operations in one analysis step the values are added together combined by binary or e g storing base stress 44 FATIGUE_CYCLES f cycles FATIGUE MAX FRAC T STRAIN MULT FATIGUE COD LOAD COEFF f codcoeff and resetting fatigue max fract strain are requested by the value 3 Typically FATIGUE_TASK is set to 3 store base stress reset fatigue max fract strain before the first step of the load to be cycled and to 0 for the rest steps of the fatigue load then to 12 calculate apply fatigue damage before the first step applying the damage and to 8 for the rest damage application steps then to 0 for any following static analysis The number of cycles 18 determined the FATIGUE CYCLES parameter in the solutions parameters set before the load step when the fatigue damage is calculated The value of 0 means a non cycling load Multiplier for max fract strain induced by fatigue e g 0 2 if the damage is applied in 5 analysis steps Multiplier for the influence of the cycling crack opening displacements when calculating fatigu
234. lly thorough however it is also more costly in terms of CPU requirements By default the LUMPED approach is used Note that LUMPED is usually preferred for linear elements whilst VARIATIONAL is the best choice for nonlinear elements The third option i e NEAREST set values in element nodes to be equal to those at the nearest integration point This output is available only for the location ELEMENTS Output only maximum minimum sum or average of all values over the printed domain incl loop over specified data items components This flag is significant only for MONITOR output If TRACK is used the monitored output data are stored for later output and they are also printed immediately The keyword RECORD inhibits the immediate output and the data are only stored for later use Default value TRACK ATENA Input File Format 195 Table 124 Output type keywords understood by the command amp OUTPUT for the location type OUTPUT_DATA Output keyword CURRENT OUTPUT DATA ATTRIBUTES List of output data ie list of output keyword currently available for output RETARDATION TIMES Retardation times used for approximation of O GENERATED CREEP DATA Exact and approximated values of creep material compliance function generated by a creep material model Measured laboratory water loss in concrete for improving creep model accuracy improving creep model accuracy improving creep model accuracy MONITOR SET 1 set
235. lowing commands Syntax amp INITIAL CONDITIONS NODAL TEMP TEMP TEMP MAT TEMP MAT TEMPERATURE HUMIDITY MATERIAL SETTINGS amp MANUAL INITIAL VALUES ENTRY amp GENERATED INITIAL VALUES j amp MANUAL INITIAL VALUES ENTRY NODE n TYPE type W w TEMP temp Table 167 Nodal Initial Conditions Definition manual entries Sic odd NODE n Set initial conditions for node Specify type of material used in node n Note that transport analysis is integrated in finite nodes rather than integration nodes in finite elements and hence material model is related to finite nodes and not finite elements Set initial condition for relative humidity A Moisture conditions can be equivalently also set by setting the amount of water content w see the ATENA Theoretical manual for definition of w TEMP temperature Set initial temperature in the node Kelvin amp GENERATED INITIAL VALUES NODAL SETTING SELECTION se ection name TYPE type GENERATE GENERATE W GENERATE TEMP CONST const COEFF X coeff x COEFF Y coeff y COEFF Z coeff 2 268 Table 168 Nodal Initial Conditions Definition generated entries Sub Command SELECTION Name of selection for which the generation is requested selection name TYPE type Specify type of material used in nodes in the selection GENERATE H Keyword for entities to be generated The value is generated GENERA
236. m cement Units mass Default value 161 kg Fine and coarse aggregeate mass in concrete M ageregate Units mass Default value 2086 kg Filler mass in concrete m pe Units mass Default value 69 kg Cement density Units mass length Default value 3220 kg m Water density Units mass length Default value 1000 kg m Density of coarse and fine aggregate Units mass length Default value 2800 kg m Density of filler Units mass length Default value 2400 kg m Heat capacity of aggregate per unit volume C aggregate Units energy lenght C Default value 2 352E6 J m C Heat capacity of filler per unit volume C ai Units energy lenght C Default value 2 268E6 m C Heat capacity of cement per unit volume cement Units energy lenght C ATENA Input File Format 263 pf eat value 241586 J C C WATER TEMP TEMP val Heat capacity of water per unit volume Units energy lenght C Default value 4 18E6 J m C K AGGREGATE TEMP TEMP val Heat conductivity of aggregate 2 aggregate Units energy length time temperature Default value 1 9 J m second C K FILLER TEMP TEMP val Heat conductivity of filler 4 Units energy length time temperature Default value 0 6 J m second C K CEMENT TEMP TEMP val Heat conductivity of cement 4 Units energy length time temperature Default value 1 55 J m second C
237. mand amp MATERIAL Linear Elastic Isotropic Materials Cementitious Materials Elastic Plastic materials User Material Interface Material Material Type for Reinforcement Material Type for Spring Microplane Material Type for Concrete iii 11 11 12 13 15 15 15 16 16 17 18 18 25 46 48 48 48 49 60 70 71 75 76 119 123 125 127 132 133 4 3 9 4 3 10 4 3 11 4 3 12 4 3 13 4 3 14 Creep Materials Material Type for Combined Material Material Type for Material with Variable Properties Material Type for Material with Temperature Dependent Properties Material Type for Material with Properties Varying in Space Material Types for Simplified Nonlinear Analysis Using CCBeam Element 4 4 Load and Boundary Conditions Definition 4 5 Step and Execution Commands 4 5 1 The Command amp STEP 4 6 Output Command 4 61 Command amp OUTPUT 4 7 Creep Analysis Related Commands 4 72 1 The Command amp RETARDATION 4 7 2 The command amp HISTORY IMPORT 4 8 Dynamic Analysis Related Commands 4 8 1 Finite element and material model related data 4 8 2 Dynamic initial values of state variables 4 8 3 X CCStructuresDynamic Set parameters 4 84 X Step definition 4 855 Lumped masses 4 86 Eigenvalue and eigenvectors analysis 4 8 7 Eigenvalues and eigenvectors analysis execution command 4 8 8 Sample input data for transient dynamic analysis 4 8 9 Sample input data for eigenvalues and eigenvectors analysis 4 9
238. me at which D REF is specified time default 10 years M COEFF exponent to calculate time evolution of chloride diffusion D typically equal to 0 69 0 93 0 66 for structures submerged in salt water suibject to high low tide air exposure regularly sprinkled by salt water TIME M COEFF time at which M COEFF is valid time default 30 years It is important to note that in case of CHLORIDES and CARBONATION element load the amp LOAD FUNCTION is used to project the solution time to degradation time t f t It is not a load s multiplier as in the case of other element loads Volumetric mass or body load due to accelerations increments in a general direction defined as vector reference coordinate system amp MASS ACCELERATIONS e g in units m s It can be specified only in global coordinate system During the load assembling it is replaced by a concentrated force with value m a where a is the specified acceleration and m is nodal mass from calculation of mass matrix optionally increased by nodal lumped masses If a load time function is specified i e being understood as the load accelerogram function it is assumed that this function defines total accelerations in a time and not load increments as it is usual in most other load types The corresponding load 184 increment at time is then calculated as t At f t where f t is the acceleration function and a is con
239. me is appended by step id The serialization by substeps appends the file name by substep id step id If n 0 then it the automatic serialization is stopped 4 9 9 The Command amp PUSHOVER ANALYSIS An usual static analysis can be accompanied by the Pushover analysis as advocated in Eurocode In this case the structure is loaded incrementally and its load displacement diagram is recorded After each step the pushover analysis is carried out using the recorded LD ATENA Input File Format 231 diagram and if the criteria of the pushover analysis are met any additional loading i e subsequent load steps are ignored Syntax amp PUSHOVER ANALYSIS PUSHOVER ANALYSIS IS ACTIVE n MONITOR ID 7 FORCE MONITOR NAME name FORCE ITEM IDn DISPLS MONITOR NAME name DISPLS ITEM IDn GAMMA FACTOR GAMMA FACTOR GAMMA FACTOR x MASS NORM MASS PERIOD T Bx PERIOD T PERIOD Dx ETA FACTOR BETAO x SOIL FACTOR x ACCEL GROUND x ACCEL GROUND Dx P Dx P Fx EXT P Fx PO STOP IF ULS AND DLS FLAG n PO STOP ONLY IF UNSTABLE FLAG r STOREY NODES IDS n VERTICAL AXIS IDn HORIZONTAL AXIS IDa STOREY DLS COEFF EXECUTE Table 150 amp PUSHOVER ANALYSIS command parameters IS ACTIVE n If n 1 carry out pushover analysis at the end of execution of each CCStructures s step If the Eurodoce requirements are met the STOP FLAG see below is set to 1 and any subsequent S
240. mension of the material model and the dimension of the finite element where it is used So in most cases it is not needed to use this command In certain cases however the program cannot determine correctly the idealisation to use such a case is for instance if a 3D model is to be used in 2D element Then it is necessary to directly specify if plane stress or strain idealisation is to be used 4 3 4 User Material 4 3 4 1 Sub command amp USER MATERIAL Syntax amp USER MATERIAL TYPE CC3DUserMaterial Ex POISSON NY x UserParameterN x DAMPING MASS xyDAMPING STIFF 124 Table 75 amp USER MATERIAL sub command parameters Parameter Basic properties from elastic material Ex Elastic modulus Units 17 Acceptable range 0 maximal real number gt Default value 210 x 10 f f MU POISSON NY x Poisson s ratio Units none Acceptable range 0 0 5 Default value 0 3 RHO x Material density Units M P Acceptable range 0 maximal real number Default value 0 00785 f f ALPHA x Coefficient of thermal expansion Units 1 T Acceptable range lt 0 maximal real number gt Default value 0 000012 DAMPING MASS x Mass and stiffness damping factors specified for indiviual DAMPING STIFF xx element group They overwrite the same factor set for the whole structure by SET command Defines the idealisation if material model with higher IDEALI
241. meter represents the maximal size of aggregates used in the concrete material Units 1 Acceptable range lt 0 gt Default value 0 02 fi UNLOADING x Unloading factor which controls crack closure stiffness Acceptable range 0 17 0 unloading to origin default unloading direction parallel to the initial elastic stiffness IDEALISATION Defines the idealisation if material model with higher dimension is to be used in a finite element with lower dimension For instance in case a 3D model is to be used in 2D configuration Units none Acceptable range 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D Default value program tries to determine a suitable idealisation based on the dimension of the material model and the dimension of the finite element where it is used So in most cases it 15 not needed to use this command In certain cases however the program cannot determine correctly the idealisation to use such a case is for instance if a 3D model is to be used in 2D element Then it is necessary to directly specify if plane stress or strain idealisation 1s to be used DAMPING MASS x Mass and stiffness damping factors specified for indiviual DAMPING STIFF xx element group They overwrite the same factor set for the whole structure by SET command 4 3 2 5 Sub command amp 3DNONLINCEMENTITIOUS2USER amp 3DNONLINCEMENTITIOUS2USER TYPE CC3DNonLinCementitious2User Ex MU POISSON NY x
242. mmand ATENA Input File Format 133 FUNCTION n Function which defines uniaxial spring relationship Relationship should be defined as a set of points starting in compression passing through 0 0 and extending into tension a Units none Acceptable range 1 maximal integer gt Default value none see command amp FUNCTION 4 3 8 Microplane Material Type for Concrete 4 3 8 1 Sub command amp MICROPLANE Syntax amp MICROPLANE amp MICROPLANE4 amp CCM4 amp amp CCMARC amp MICROPLANE4 The following microplane based models are supported in ATENA material library Material models amp CCMICROPLANE4 Original version of the M4 microplane model for concrete developed by Prof Bazant and Dr Cannera Northwestern University IL Enhanced version of the M5 developed by Prof Bazant and Mr Zi Northwestern University IL This version is prepared for being size independent resulting in M5 model A proper calibration is currently in progress and will be added in ATENA as soon as available amp CCMAR Extension of the CCM4 material for analysis taking into the effect of loading rate amp CCMARC Extension of the CCM4R material model that also accounts for the effect of material creep and shrinkage amp MICROPLANE4 TYPE CCMicroplane4 NP n KI x K2x KAx BAND x IDEALISATION 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D Cl x C2x C21 x 4
243. mp SIMPLE LOAD DISPLACEMENT SIMPLE amp LOAD PLACE amp LOAD VALUE Table 107 SIMPLE LOAD DISPLACEMENT description This type of Dirichlet boundary condition sets the following general boundary condition u value It is the simplest way to define prescribed deformation at a specified node and degree of freedom defined in amp LOAD PLACE Location of the boundary condition is specified by id of supported node and its supported degree of freedom Alternatively the boundary condition can be set for all nodes and the specified supported degree of freedom whose ids are stored in a list of ids see command amp SELECTION In this case the BC s value is calculated as follow u const xcoeff x ycoeff yv zcoeff z see amp LOAD VALUE command fragment In the above x y z are coordinates of node id from the list This way it is possible to prescribe variable load that depends of coordinates of a node to which it is applied Typical example of such a load may by lateral hydrostatic pressure applied to a vertical wall of a 176 amp LOAD FORCE LOAD TYPE CONCENTRATED LOAD LUMPED MASS amp LOAD FUNCTION amp COMPLEX LOAD FORCE amp SIMPLE LOAD FORCE amp COMPLEX LOAD FORCE COMPLEX 1 amp SLAVE NODES amp LOAD VALUE amp SIMPLE LOAD FORCE SIMPLE amp LOAD PLACE amp LOAD VALUE Table 108 SIMPLE_LOAD_FORCE and COMPLEX_LOAD_FORCE description Both these commands are similar t
244. mple TYPE CCAnalyticFunction Y EQN 1 12 5642 sin 12 56 x ATENA Input File Format 227 The optional intput ie OUTPUT X OUTPUT Y OUTPUT INTEGRATE Y OUTPUT DERIVATE Y OUTPUT NONE 3 MIN VAL X val x MAX VAL X max val x INCR VAL X incr val OUTPUT SUFFIX suffix string 1 is for printing and plotting of X Y and other values of the specified function Upon issuing this sub command Atena creates a new output in OUTPUT DATA category name of the output is assembled as FUNC 7 type suffix string n type suffix string are respectively function id one of X Y INTEGRATE Y DERIVATE Y depending on OUTPUT request and user defined output name suffix The function is derivated with respect to X and integrated with respect to X within min val x and x If incr val x is specified the requested function values are printed for min val x min val incr val x min val x 2 incr val x max val x Otherwise the values are printed only at definition points that falls into interval min val x max val x More output requests can be issued within one FUNCTION command In case of redefining ie recreating FUNC_n_type_suffix_string output it is sometimes necessary to set on recalculate flag within the OUTPUT command to print the actual data i e use command OUTPUT LOCATION OUTPUT DATA DATA LIST FUNC_n_type_suffix_string RECALCULATE Use command OUTPUT PLOT to define horizontal and vertical ser
245. n of CCFEModel being the base for all engineering modules in ATENA and hence most input command for the transport analysis are the same as those e g for static analysis of structures This section describes additional commands that are relevant only for the transport analysis Generally it is important to recognize similarity between static and transport analyses Primary unknowns ie LHS and loading ie RHS variables for static analysis are deformations and load forces respectively The equivalent entities for the transport analysis are vector of psis i e LHS variables and vector of fluxes i e RHS variables The psis encompass nodal relative humidity and temperature Similarly the vector of fluxes includes moisture ant heat fluxes at structural nodes If Dirichlet boundary conditions are given that means we are going to fix somewhere humidity and or temperature value The same applies for Von Neumann boundary conditions Similar to static analysis both LHS and RHS boundary conditions have incremental character however sign of Von Neumann boundary conditions now depends on flux s orientation with respect direction of normal of the surface where the boundary condition is applied and thus unlike in CCStructures the direction of global coordinate axes is irrelevant Plus sign means an inflow i e flow going in the surface i e in the body and minus sign means an outflow flow in the surface i e losses At beginning of the analysis
246. n services and input commands Other services and input commands are borrowed from CCStructuresCreep and CCStructuresTransport modules The aim of this section is to describe additional input command that are specific for dynamic analysis and to point out small modification of the commands existing in other engineering modules to serve purposes of dynamic analyses 4 8 1 Finite element and material model related data Most structural finite element and any structural material available for static analysis can be used also for dynamic analysis Of course unlike in statics dynamic analysis needs proper value of material density i e the RHO parameter 4 8 2 Dynamic initial values of state variables The initial structural accelerations and velocities at finite nodes are set in a similar way to their specification within CCStructuresTransport module By default zero initial accelerations and velocities at nodes are assumed The nodal initial conditions be set by the input command amp DYNAMIC INITIAL CONDITIONS 206 Syntax amp DYNAMIC INITIAL CONDITIONS NODAL ACCEL VEL VEL ACCEL ACCELERATION VELOCITY SETTINGS amp MANUAL INITIAL VALUES ENTRY amp GENERATED INITIAL VALUES j amp MANUAL INITIAL VALUES ENTRY NODE n VEL vel x vel y vel z ACCEL accel x accel y accel z Table 137 Nodal Initial Conditions Definition manual entries NODE n Set initial conditions for node n VEL vel x vel
247. n the pushoover analysis status and the flag PO STOP IF ULS AND DLS FLAG Default n 0 PO STOP IF ULS AND DLS FLAG n If n 1 the pushover analysis is completed after both ULS and DLS criteria are met If n 0 to complete the analysis it suffices to fulfill only the ULS critera Default n 0 STOREY NODES IDS List of node ids for all floors fo the structure The nodes must be input sorted from the ground to the heigest floor If an id n 0 then the associated displacement are assumed zero It is typically used for gound floor If the structure has stories m node ids are expected If node node ids are input DLS check in the Pushover analysis is skipped Note For expert users only Others are discouraged to input this parameter Atena maintains this parameter automatically and no intervention from the user is needed Units none Default none Example 0 249 693 VERTICAL AXIS ID Id of model axis to be considered vertical 1 e axis where gravity load applies Units none Default 3 1 e Z axis HORIZONTAL AXIS ID Id of model axis where the ground acceleration is applied Units none Default 1 1 e X axis STOREY DLS COEFF x Coefficient coeff to calculate maximum interstory drift d lt h h is height of store and d is relative storey drift Units none Default 0 005 EXECUTE Carry out pushover analysis immediately By
248. nalysis by the command amp HISTORY IMPORT Syntax amp HISTORY EXPORT HISTORY APPEND OVERWRITE EXPORT TO GEOMETRY geometry filename RESULTS results filename 2 Table 172 Transport analysis HISTORY EXPORT command parameters Parameter Description results filename Name of binary file with the history It must be the same as that specified for HISTORY IMPORT command the CCStructuresCreep module It should be enclosed in double quote character geometry filename Name of binary file with geometry of the exported model It must be the same as that specified for HISTORY IMPORT command in the CCStructuresCreep module It should be enclosed in double quote character 4 If omitted identical imported and current models are assumed ATENA Input File Format 271 APPEND Open option for the file By default the gets during OVERWRITE execution overwritten EXPORT TO Ignored keywords 4 11 6 amp Transport element load The transport analysis supports the following types of element load e amp BOUNDARY ELEMENT LOAD e amp BODY ELEMENT LOAD amp FIRE BOUNDARY LOAD e amp MOIST TEMP BOUNDARY LOAD amp FIRE BOUNDARY LOAD FIRE BOUNDARY GROUP group id TO group id to BY group id by ELEMENT element id TO element id to BY element id by SELECTION ist name COEFF const COEFF X coeff COEFF Y coeff y COEFF Z coeff z FIRE TYPE GENERIC NOMINAL HC
249. name Output of previously monitored and stored output data set set name in MONITOR 1 or PLOT 1 MONITOR SET 2 set name Output of previously monitored and stored output data set set name in MONITOR 2 or PLOT 2 SELECTION IDS selection name List of entities selection list selection name SELECTION GEN Data for selection lists generation DISCRETE REINFORCEMENT Data for discrete reinforcement generation Superseded by data attribute DISCRETE REINFORCEMENT within location type MACRO ELEMENTS SMART IDS MAP INFO Info about maximum reference ids for the mapped ATENA entities such as nodes element groups etc BEAM CHECK M N DATA M N diagrams for CCBeam3D elements with CCBeamMasonryMaterial and or CCBeamR CMaterial CURRENT RHS BC Current values of RHS forces at nodes CURRENT LHS BC Current values of LHS boundary conditions at nodes CURRENT SORTED LHS BC Same as the above but sorted in different way xxx yyy Output values for function xxx generated by command yyy see amp FUNCTION command 196 Table 125 Output type keywords understood by the command amp OUTPUT for the location type GLOBAL Output keyword FEMODEL _ Characteristics of the finite element model CHARACTERISTICS TASK NAME Problem task name The name specified using the TASK command will be printed to the output stream TASK TITLE Title as it was specified using the TASK command STEP ID Step identifications being currently executed
250. nd of each step For lt 0 the above applies in opposite way For n 0 no realignment is carried out The top surface line of the gap element is the surface line whose nodal ids are entered firstly in the gap s incidences If n 1 each slave node is given coordinates of its master node Consequently this projection is suitable only for gap elements with zero thickness If n 2 slave nodal locations are calculated as the normal projection of the corresponding master nodes into surface line defined by the deformed slave nodes If n 3 slave nodal locations are set to coincide with the corresponding master nodes and thereafter they are shifted in the direction to the original position of the slave nodes surface line The shift equals to the original gap thickness 4 3 6 Material Type for Reinforcement 4 3 6 1 Sub commands amp REINFORCEMENT amp REINFORCEMENT_WITH_CYCLING_BEHAVIOR amp SMEARED_REINFORCEMENT and amp CIRCUMFERENTIAL SMEARED REINFORCEMENT Syntax amp REINFORCEMENT TYPE CCReinforcement FUNCTION n F MULTIP x Table 77 amp REINFORCEMENT command parameters Parameter Description Basic properties 128 FUNCTION a ALPHA x MULTIP x COMPRESSION x Syntax Elastic modulus Units 17 Acceptable range 0 maximal real number Default value 210 x 10 MPa Function which defines uniaxial stress strain relationship Relationship should be defined as a set of points start
251. nd parameters Parameter Description CONCRETE Type of concrete Only type 1 and 3 are supported CONTIG Hype Default value 1 THICKNESS thick Ratio volume m surface area m of cross section For long elements it is approximately cross sectional area m perimeter m Default value 0 0767 m FCYL28 fcyl28 Cylindrical material strength in compression kPa Default value 35100 kPa E28 e28 Short term material Young modulus at 28 days ie inverse compliance at 28 01 days loaded at 28 days kPa Default value calculated from fcy 28 ATENA Input File Format 155 HUMIDITY humidity Ambient relative humidity 0 3 1 Default value 0 780 END OF CURING Time at beginning of drying i e end of curing days TIME endcuring Default value 7 days HISTORY TIME For each entry of material history the data time temper and time HUMIDITY humid must be input If the data keywords are used then it humid doesn t matter in which order the 3 data are input Otherwise the TEMPERATURE indicated order is assumed The units are days degrees Celsius temper and dimension less humidity in interval 0 3 1 LOAD CURRENT Current or load time for the subsequent measured value LIME Lane Default 0 days SHRINKAGE Measured shrinkage measured_val for previously specified load measured val and current time Unit of shrinkage is dimension less amp CCModelBP1 DATA CCModelBP1 CONCRETE concrete
252. nforcement CCSmearedReinf Units none Acceptable range 1 maximal integer gt Default value none FILENAME name File name containing the spatial distribution of material parameters Units none Acceptable range any string Default value none 4 3 14 Material Types for Simplified Nonlinear Analysis Using CCBeam Element 4 3 14 1 Sub command amp BEAM_MASONRY_MATERIAL This model can be used for nonlinear analysis of reinforced masonry structures modeled by CCBeam elements It is used for solid part i e masonry An eventual reinforcements should be modeled by CCBeamReinfBarMaterial The material conforms with recommendations given by Eurocode and similar codes for practice The input design strengths overwrite values based on input of characteristic strengths Syntax amp BEAM MASONRY MATERIAL TYPE CCBeamMasonryMaterial E x MU x RHO x ALPHA F_VKO x COEFF_F VK x x F_VLT_CONST x COEFF INPLANE x XK OUTPLANE F XK x R_RATIO x GAMMA VDx F XD INPLANE x XD OUTPLANE F_ XD x EPS MU x EPS Mx LAMBDA 164 ETAx REL TOL ITER n EPS SMALL x ALPHA STEP ALPHA TOL x FLEX DRIFT COEFF x SHEAR DRIFT COEFF x STIRRUPS SPACING STIRRUPS AREA x STIRRUPS MATERIAL n DAMPING MASS DAMPING STIFF Xx Ta
253. ng factor which controls crack closure stiffness Acceptable range 0 17 0 unloading to origin default 1 unloading direction parallel to the initial elastic stiffness Defines the idealisation if material model with higher dimension is to be used in a finite element with lower dimension For instance in case a 3D model is to be used in 2D configuration Units none Acceptable range 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D Default value program tries to determine a suitable idealisation based on the dimension of the material model and the dimension of the finite element where it is used So in most cases it 1s not needed to use this command In certain cases however the program cannot determine correctly the idealisation to use such a case is for instance if a 3D model is to be used in 2D element Then it is necessary to directly specify if plane stress or strain idealisation is to be used Mass and stiffness damping factors specified for indiviual element group They overwrite the same factor set for the whole structure by SET command 4 3 2 3 Sub command amp 3DNONLINCEMENTITIOUS2 amp 3DNONLINCEMENTITIOUS2 ATENA Input File Format 83 TYPE CC3DNonLinCementitious2 Ex MU POISSON NY x FT RT F T R_T x FC RC F_C R_C x FCO RCO F_CO R_CO x GF CRACK SPACING x TENSION STIFF x WD EPS CP x FC REDUCTION BETA x RHOx ALPHA x FT MULTIP x SHEAR FACTOR x AGG SIZE
254. nite element type name For instance CCIsoTriangle lt xxx_x gt indicates a four nodes triangular element CCIsoTriangle with the fourth node located between node 2 and 3 Names of other element types are input directly without the lt xx gt decoration e g Spring The system automatically distinguishes between 2D 3D or axisymmetric variant of the element used E g TYPE CClsoQuad lt xxxx_xx gt GAMMA REF x Factor for accounting angle between mesh and crack direction See theoretical manual for more description GAMMA COEFF x Factor for accounting angle between mesh and crack direction See theoretical manual for more description PREPARE CALCU Force immediate preprocessing of the input element type for calculation It is the user s responsibility to ensure that all needed data are already available i e input By default this flag is not specified and preprocessing of element types is delayed up to the very last moment prior the execution DEFAULT_ PROCESSING Special flag for processing initial INITIAL STRAIN ONLY INTO SOLID strain stress load for elements with INITIAL STRESS ONLY INTO SOLID embedded smeared reinforcement By INITIAL STRAIN ONLY INTO REINF default the load is applied to both solid INITIAL STRESS ONLY INTO REINF jand reinforcement parts of the element ATENA Input File Format 63 Table 53 Available element types E g CCIsoBrick lt xxxxxxxx gt E g CCIlsoWedge lt xxxxxx gt CCIsoTe
255. nts 0 000 2 025 0 5 FC E 0 80 FC E 1 00 FC E 0 005 0 00 Note the x values should be negative Characteristic size for which the various compressive functions are valid Format CHAR SIZE COMP x Units 1 Acceptable range 0 maximal real number gt Default value 0 15 f Strain value after which the softening hardening becomes localized and therefore adjustment based on element size is needed Format X LOC COMP x Units none Acceptable range 0 maximal real number Default value 0 0006 i e FC E 104 Tension compression interaction TENSILE STRENGTH Index of the function defining the tensile strength reduction RED FUNCTION based on the compressive stress in other material directions The horizontal axis represents relative compressive stress normalized with respect to f and the vertical axis the relative reduction of the tensile strength with respect to f Format TENSILE STRENGTH RED FUNCTION Units none Acceptable range lt 1 maximal int number gt Default value none Generation formula default function should have the following points 0 000 100 020 Miscellaneous OOOO O a Excentricity defining the shape of the failure surface Format EXC x Units Acceptable range 0 5 1 07 Default value 0 52 BETA Multiplier for the direction of the plastic flow Format BETA x Units Acceptable range minimal real number maximal real number
256. o the above SIMPLE LOAD DISPLACEMENT and COMPLEX LOAD DISPLACEMENT They specify an applied force or mass at a node instead of displacement at a node amp LOAD MASTER SLAVE NODES MASTER amp MS PAIRS amp MS GROUPS amp MS SELECTION amp MS PROCESS FLAGS amp MS PAIRS SLAVE NODAL PAIRS ACCEPT OUTSIDE ELEMENT DISTANCE x n REPLACE REPLACES i amp MS GROUPS SLAVE NODAL GROUPS ACCEPT OUTSIDE ELEMENT DISTANCE x SHAPE shape n REPLACE REPLACES i 8 SELECTION t SELECTIONS LISTS ist of masters list of slaves DISTANCE x amp MS PROCESS FLAGS PROCESS FLAG REFERENCE COORDS USE CURRENT COORDS COPY DEFORMATION COPY DEFORMATION ONCE COPY NO DEFORMATION 1 SKIP DOFS MASK skip mask Table 109 LOAD MASTER 51 NODES description The LOAD MASTER SLAVE NODES command structure is a special case of ATENA Input File Format 177 amp COMPLEX LOAD DISPLACEMENT when all nodal degrees of freedom of the slave node have to equal to its corresponding master degrees of freedom This is the case of the above command with PAIRS keyword i e the 1 line of the command The command also can set that all slave degrees of freedom are to be replaced by linear combination of the appropriate degrees of freedom of several master nodes In this case the GROUPS keyword used For 2D case master nodes must form line i e 2 master nodes triangle i e 3
257. o the resultant moment from M and load Therefore moment along Z must be equal Zero Units none Default value 30 EPS SMALL x Strain value already assumed neglibable Units none Default value 0 001 ALPHA STEP x Angle step for resultant moment load at which the M N diagram of cross section is cached For zero or negative value nthing is cached and the appropriate M N diragram is calculated on run time basis Units none Default value 2 60 ALPHA TOL x Angle difference for resultatnt moment load thas is assumed negligible Units none Default value 360 ATENA Input File Format 167 FLEX DRIFT _ COEFF x Coefficinet to check maximum flexural drift By default x 0 008 If the criterion violated corresponding beam s moments are reduced to zero SHEAR DRIFT COEFF Coefficinet to check maximum shear drift By default x 0 004 X If the criterion violated corresponding beam s shear forces are reduced to zero STIRRUPS SPACING x Stirrups spacing Units length Default value 0 0 STIRRUPS AREA x Area of reinforcement stirrups typically 2 x stirrup area Units length Default value 0 0 STIRRUPS MATERIAL 14 of material froim which the tirrups are made n Units none Default value NONE 4 3 14 2 Sub command amp BEAM RC MATERIAL This model can be used for nonlinear analysis of reinforced concrete structures modeled by CCBeam elements It is used for solid part i e
258. of several static like integration steps one for each sample time It starts at creep step time of the current creep step and stops at min time of the next creep step execution stop time see amp CREEP ANALYSIS PARAMS The analysis cannot exceed time_end see RETARDATION NAME step name Step name in quotes that is going to be defined Integral identification of the step step name AT RESUME time Time at the beginning of the current creep step in days If AT label is used ATENA assumes that an additional loading is applied in this step and therefore it automatically refines time integration i e it resets step time incerements dt to 0 1 days If RESUME AT label is used no additional loading is assumed and thus no special time refinement is carried out This option can be used for getting user control and produce some print outs figures etc during execution of creep analyses LOAD CASE Linear combination of load cases for step step name FIXED INCREMENT which are to be used in this step The FIXED type of load is ini x evenly distributed into all applied integration time sub steps of the current creep step whilst the INCREMENT type is used only in the 1 integration sub step In the remaining sub steps they are applied but load values are a priori zeroised Typically loads are specified as of INCREMENT type and LHS boundary conditions as of FIXED type By default the FIX
259. of the extrusion defined by NODE and SOURCE NODE macro nodes The vector can be of zero length At the end the macroelement generates selection lists for the two surfaces of extruded elements They are named as ELEMPROP n SOURCE NODEPROP lt bottom surface and ELEMPROP n SOURCE NODEPROP gt top surface where n is number of copies If n 0 i e the 1 layer the whole string 0 is omitted For example the sample below would generate the following selections Block 3 Block 2 N2N3N6N7 Block 3 Block 2 N2N3N6N7 gt Block 3 1 Block 2 N2N3N6N7 lt Block 3 1 Block 2 N2N3N6N7 gt Block 3 2 Block 2 N2N3N6N7 lt Block 3 3 Block 2 N2N3N6N7 gt Syntax SOURCE GROUP id SOURCE NODE id SOURCE ELEMPROP e emprop SOURCE NODEPROP nodeprop ACCOMPLISH count TIMES Table 159 MACRO ELEM DATA SPEC for CCCopyElementSelection macro element parameters Parameter Description SOURCE NODE id Defines id of a bottom macronode for the extrusion vector The top node is defined by NODE id SOURCE ELEMPROP All elements defined in the selection elemprop with nodes elemprop defined in SOURCE NODEPROP nodeprop will be used as a base for the extrusion SOURCE NODEPROP See above nodeprop SOURCE GROUP id element group that contains elements SOURCE EPROP elemprop ACCOMPLISH count Specifies number of copies to be generated By default one copy TIMES is created
260. olute value of humidity increments Default value is 0 01 E g HUMIDITY ERROR x STEP STOP TEMPERATU Factors for appropriate convergence criterion value If a RE ERROR FACTOR x convergence criterion value multiplied by the appropriate factor STEP STOP HUMIDITY exceeds the related calculated analysis error then the execution is 270 ERROR FACTOR x immediately killed They are two sets of factors the first one for checking each iteration and the other one to be exercised at the ITER STOP TEMPERATU end of each step The default value for iteration related factors is RE ERROR FACTOR x 1000 whilst the default value for step related factors is 10 ITER_STOP_HUMIDITY E g ERROR FACTOR x SET Absolute Step stop humidity error factor 15 Step stop temperature error factor 53 Iter stop humidity error factor 201 Iter stop temperature error factor 203 SET Relative Step stop humidity error factor 54 Step stop temperature error factor 56 Iter stop humidity error factor 204 Iter stop temperature error factor 206 NEGLIGIBLE TEMPERAT Values that are negligible i e that can be ignored By default URE x NEGLIGIBLE they are set to 1 E 11 HUMIDITY x E g SET Absolute error Negligible_temperature 0 1 Relative error Negligible temperature 0 2 4 11 5 The amp HISTORY EXPORT command The command forces ATENA to export data about humidity and temperature history at structural nodes These data can be later imported into static a
261. om Typically the higher nsave the better convergence but also the bigger memory required by the solver 30 Default value is ndofs 6 for DOMN LUOM and ndofs 3 for DGMR LUGM solver EXTEND ACCURACY Factor by which an iterative sparse matrix solver should increase _FACTOR x its requirement upon accuracy If x gt 0 the solver will employ residual forces convergence criterion with requested max error RELATIVE RESIDUAL ERROR x If x 0 residual displacements convergence criterion will be used with max error RELATIVE DISPLACEMENTS ERROR x Recommended values lt 1 10 gt Default 2 PARDISO REQUIRED Accuracy required by PARDISO solver For y 0 do not perform preconditioned Krylow Subspace iterations and use LU factorisation instead Otherwise the value of y controls accuracy of the built in iterative solver further strenghten by the above EXTEND ACCURACY FACTOR factor x The final required accuracy expressed in number of non negligible digits behing the decimal point is log10 y If the problem matrix is unsymmetric e q transport analysis CGS iteration replaces the computation of LU The preconditioner is LU that is computed at the previous step the first step or last step with a failure in a sequence of solutions needed for identical sparsity patterns controls the stopping criterion of Krylow Subspace iteration 4 210 is used in lax ax r is the residuum at iterat
262. on 5 Default value AIR Time at beginning of drying i e end of curing days TIME endcuring Default value 7 days LTIME time Default 0 days SHRINKAGE Measured at current humidity shrinkage measured val for measured val previously specified load and current time Unit of shrinkage 1s dimension less amp CCModelGeneral CCModelGeneral T T t FIfij EPS eps FCYL fcyl 4 Table 96 amp CCModelGeneral sub command parameters Parameter Description T Set effective loading time for following data Default value none Units t Tt Te Set effective observation time for following data i e a time 158 when an input value is measured Default value none Units t Value of material compliance fi t for times 1 7 Default value none Units 1 S Material shrinkage eps t at time of observation f Default value none Units none FCYL Current cylindrical strength in compression fcy t pertinent for loading time 1 Note that the value is input as positive value Default value none Units S 4 3 10 Material Type for Combined Material 4 3 10 1 Sub command amp COMBINED MATERIAL Syntax amp COMBINED MATERIAL TYPE CCCombinedMaterial COMPONENT id RATIO x COMPONENT id2 RATIO x2 COMPONENT id3 RATIO x3 Table 97 amp COMBINED MATERIAL sub command parameters Parameter Description Basic properties COMPONENT id Id of the prev
263. onal shape and average exterior temperature and humidity The MP METHOD uses accurate temperature and humidity at each structural material point and therefore it need additional analysis of moisture and heat transfer Currently only CS METHOD is supported Default value CS METHOD amp DYNAMIC ANALYSIS PARAMS STOP TIME execution stop time LAST TIME ast time NEWMARK METHOD HUGHES ALPHA METHOD Table 31 amp DYNAMIC ANALYSIS PARAMS sub command parameters Parameter Description STOP TIME Time at which the execution should stop If it is not 46 execution stop time defined i e execution stop time 0 then it is assumed execution stop time last time Default value 0 LAST TIME ast time Last time of the whole analysis Default value 0 NEWMARK METHOD Dynamic analysis method to be used HUGHES ALPHA METHOD Default value HUGHES ALPHA METHOD amp MAX REF IDS MAX REF ID MACRO NODES SMART IDS MAP MACRO ELEMENTS SMART IDS MAP MATERIALS SMART IDS MAP LOAD CASES SMART IDS MAP STEPS SMART IDS MAP FUNCTIONS SMART IDS MAP GEOMETRIES SMART IDS MAP ELEMENT TYPES SMART IDS MAP NODES SMART IDS ELEMENT GROUPS SMART IDS MAP ELEMENTS SMART IDS MAP FOR GROUP group id max ref id y Table 32 amp REF IDS sub command parameters Parameter Description MACRO NODES SMART 108 ELEMENTS SMART IDS_ MAP FOR GROUP Set maximum reference id for a specified da
264. onditions Definition generated entries Sub Command SELECTION Name of selection for which the generation is requested selection name CONST const COEFF X Generate reference temperature for nodes in the selection coeff x COEFF Y coeff y selection name The values are generated as linear COEFF Z coeff z combination GENERATE TEMP temperature base _ temp const x coeff y coeff z coeff where x y z are coordinates of nodes of nodes in the selection Units COEFF COEFF M COEFF Z T L CONST T Default all constants are set to zero Note that initial reference temperatures can be set also by applying element temperature load that import temperature history from a previous transport analysis of the structure In this case the reference nodal tepleratures corresponds to structural conditions at reference time of the first applied element temperature load As such values typically represent actual real temperatures in the structure the input described in this paragraph is not needed actually temperatures from element temperature load would be added to temperatures from the command amp STATIC INITIAL CONDITIONS Example initials for temperatures NODAL SETTING NODE i TEMPERATURE temp NODAL SETTING SELECTION all nodes CONST 25 COEFF X 0 1 COEFF Y 0 6523 COEFF Z 0 8 GENERATE TEMPERATURE NODAL SETTING BASE TEMPERATURE base temp this value is added to specific node temperature ATENA In
265. one SPACE character amp JUMP amp LABEL Jump to a particular label while parsing the input document ie skip the commands between amp JUMP and LABEL keywords amp DEBUG Set on off debug mode during Atena execution amp EVALUATE Invoke Atena calculator ATENA Input File Format 15 3 4 Analysis Identification and Execution Settings 3 4 1 The Command amp TASK Syntax amp TASK TASK NAME task TITLE title DIMENSION 7 SPACE 2 3D AXISYMMETRIC Table 3 amp TASK command parameters Parameter Description NAME task name Task name E g NAME task name TITLE title Title of the analysis TITLE title DIMENSION n Problem dimension n equals 2 or 3 for two or three dimensional analysis Note that setting of DIMENSION sets also SPACE type If DIMENSION is 2 then 2D SPACE type is expected Once DIMENSION type is set it cannot be changed elsewhere Set type of space approximation It can be 2D 3D or AXISYMMETRIC i e 2D in axis x and y symmetric with respect to axis y Radius of rotation corresponds to axis x Note that setting of SPACE type sets also problem DIMENSION Once SPACE type is set it cannot be changed elsewhere Note This command should be the first input as it specifies dimension several entities read later i e nodal coordinates 3 4 2 The Command amp TERMINATE amp BREAK Syntax amp TERMINATE TERMINATE AT MODULE mo
266. onship will be used in compression Units none Acceptable range 1 maximal integer gt Default value none see command amp FUNCTION Bauschinger effect exponent of Menegotto Pinto model Units none Acceptable range 0 maximal real number Default value 20 Menegotto Pinto model parameter Units none Acceptable range 0 1 Clx Menegotto Pinto model parameter Units none Acceptable range 0 1 Default value 0 925 Default value 0 15 RHO x Material density Units M P Acceptable range lt 0 maximal real number gt Default value 0 00785 f f ALPHA x Coefficient of thermal expansion Units 1 T Acceptable range 0 maximal real number Default value 0 000012 130 amp SMEARED REINFORCEMENT TYPE CCSmearedReinf Ex FUNCTION RATIO x DIRECTION x x x3 RHO x ALPHA x F MULTIP x Table 79 amp SMEARED_REINFORCEMENT command parameters Parameter 1 1 Elastic modulus Units F P Acceptable range 0 maximal real number gt Default value 210 x 10 MPa FUNCTION a Function which defines uniaxial stress strain relationship Relationship should be defined as a set of points starting from 0 0 and only positive values should be specified Same relationship will be used in compression Units none Acceptable range 1 maximal integer gt Default value none see command amp FUNCTION RATIO x Cross sectional area ratio of the sme
267. ows to manually specify load case id associated with this group For example if discrete reinforcement bars are input manually i e not generated the id says which load case is used to bind the bar with the surrounding solids amp ELEMENT TYPE TYPE IDn NAME element type LINEAR NONLINEAR SEMINONLINEAR TYPE element type GAMMA REF x GAMMA COEFF x PREPARE CALCULATION DEFAULT PROCESSING INITIAL STRAIN ONLY INTO SOLID 62 INITIAL STRESS ONLY INTO SOLID INITIAL STRAIN ONLY INTO REINF INITIAL STRESS ONLY INTO j Table 52 amp ELEMENT TYPE sub command parameters Parameter Description IDn Element type identification E g ID n NAME Element group name in quotes also for identification element type name E g NAME CClsoBrick LINEAR Forces to ignore all terms due to geometrical non linearity Material linearity still may exist NONLINEAR Forces to account for all terms due to geometrical non linearity This is the default setting SEMINONLINEAR Linear in the 1 iteration nonlinear in the next iterations This option is sometimes advantageous if the structure is loaded by deformations TYPE Element type in quotes element type E g TYPE element type where element type adopts form lt gt where x and _ characters in the lt gt brackets indicate number and location of nodes for hierarchical fi
268. p TEMPERATURE ELEMENT LOAD amp ELEMENT INITIAL STRAIN LOAD amp ELEMENT INITIAL STRESS LOAD amp PRESTRESSING amp FIXED PRESTRESSING amp FIXED PRESTRAINING amp MASS ACCELERATIONS amp ELEMENT INITIAL LOAD amp CHLORIDES amp CARBONATION amp LOADED ELEMS GROUP group id group id to BY group id by ELEMENT 1 element id element id to BY element id by SELECTION list name amp LOAD COEFF COEFF const COEFF_X coeff COEFF Y coeff y COEFF Z coeff 2 amp BODY ELEMENT LOAD BODY amp LOADED ELEMS amp LOAD COEF LOCAL GLOBAL X Y Z DOF idof VALUE amp BOUNDARY ELEMENT LOAD BOUNDARY amp LOADED ELEMS amp LOAD COEF LOCAL GLOBAL 1 SURFACE EDGE EDGE NO DUPLICATES MULTIPLE YES NO NODES oaded_nodes X Y Z DOF idof VALUE x MERGE MERGE STRING str NO ELEM OUTPUT amp TEMPERATURE ELEMENT LOAD TEMPERATURE amp LOADED ELEMS amp LOAD COEF REFERENCE TIME ref TARGET TIME target IMPORT GEOMETRY geometry filename IMPORT HISTORY RESULTS results filename VALUE x REF VALUE ref x NODE ID node id NODE VALUE node value REF NODE VALUE ref node value AUTOMATIC MANUAL TIME UNITS time units The option ANY is only available in 4 3 1 and older starting 4 3 2 the default is SURFACE for 3D problems and BOUNDARY for 2D and axisymmetric problems
269. pecific fracture energy Units 88 Acceptable range 0 maximal real number gt Default value 0 0001 f f Generation formula GF 0 000025 FT CRACK SPACING x Crack spacing average distance between cracks after localization If zero crack spacing is assumed to be equal to finite element size Units 1 Acceptable range lt 0 maximal real number gt Default value 0 0 TENSION_ STIFF x Tension stiffening Units none Acceptable range lt 0 1 gt value 0 0 properties EPS CP x Plastic strain at compressive strength Units none Acceptable range lt minimal real number 0 gt Default value 0 001 Generation formula FC E FCO F CO RCO Onset of non linear behavior in compression Units 17 Acceptable range lt minimal real number FT 2 Default value 20 f f Generation formula FT 2 1 WDx Critical compressive displacement Units 1 Acceptable range lt 0 maximal real number gt Default value 0 0005 fi FC_REDUCTION x Reduction of compressive strength due to cracking When cracking occurs depending on the tensile fracturing strain the compressive strength of the material is reduced using the formula from the modified compression field theory by Collins The parameter of this command is the limiting relative value of the compressive strength reduction Units none Acceptable range lt 0 1 gt ATENA Input File Format 89 Default
270. ppended If error file is not specified in the command line then standard output to the screen is assumed translate 105 this option is only for internal use for debugging Don t use it extend int output width extend real output width double number of digits used to output integer or real numbers respectively catch fp instructs flag to catch 1 e unmask floating point exceptions during the execution Upon occurrence of such exception it will get caught reported and the execution will be terminated By default floating point exceptions are ignored demo mode flag for trial execution All features are available in trial mode however there apply some restrictions towards size of the analyzed problem ATENA Input File Format 9 batch_execute option which forces AtenaWin automatically execute the given problem without any user intervention After the execution all output data are saved and AtenaWin gets terminated Use this option for batch execution execute option which forces AtenaWin automatically execute the given problem without any user intervention After the execution the AtenaWin session remains running thereby enabling a subsequent interactive postprocessing silent flag that forces AtenaWin to output eventual error messages into message file and error file By default they are output to a message box on the screen Use this option for batch execution num threads n threads n
271. pt by 9 0 D 0 Crp 0 K 0 default ATENA Input File Format 265 4 11 2 Transport finite elements The transport analysis uses different types of finite elements They are input in exactly the same way as for static analysis The following tables lists all transport analysis element For each of the supported element the table below also presents name of corresponding a finite element for static analysis which has the same geometry and nodal ids marking Table 165 Finite elements to transport analysis with Newton Cotes integration Element Description Equivalent element for static analysis with the same geometry IsoQuad4 2D 2D quadrilateral isoparametric elements CCIsoQuad4 2D IsoQuad9 2D CCIsoQuad9_ 2D IsoQuad4_Asym Axisymmetric quadrilateral isoparametric CCIsoQuad4 Asym elements IsoQuad9 2ASy CCIsoQuad9_ ASym m IsoTriangle3 2D 2 triangular isoparametric elements CCIsoTriangle3 2D IsoTriangle6 2D CCIsoTriangle 2D IsoTriangle3 AS Axisymmetric triangular isoparametric elements CCIsoTriangle3 ASy ym m IsoTriangle6 AS CCIsoTriangle6 ASy m m IsoBrick8 3D Hexahedral isoparametric elements CCIsoBrick8 3D IsoBrick20 3D CCIsoBrick8 3D IsoWedge6 3D Wedge isoparametric elements CCIsoWedge6 3D IsoWedgel5 3D CClIsoWedgel5 3D IsoTetrad 3D Tetrahedral isoparametric elements CCIsoTetra4 3D IsoTetral0 3D CCIsoTetral0 3D IsoTruss2 2D Truss isoparametric elements 2D 3D and CClIsoTrus
272. ptional parameter either a keyword or value is enclosed in square brackets If an input token has to be one of several keywords and or values then all its admissible values are enlisted in curled brackets separated by vertical bar i e NODE ELEMENT LOAD Default choice is underlined if it exists Right curled bracket with plus subscript indicates that Atena input processor accepts one or more tokens from the above list of choice NODE ELEMENT LOAD j Right curled bracket with integer subscript n indicates that Atena input processor requires just n times a token from the above list of choice x means input of 3 real numbers Features which are currently not supported are denoted with The commands between two EXECUTE keywords can appear in any order In case of multiple definition the program accepts always the last definition before the EXECUTE command The comment syntax corresponds to the C style There are two comment types e C style comment where the comment is started by i e slash and star characters and ended by i e star and slash e C style where it is assumed that everything following i e two slash characters up to the end of line is considered to be a comment ATENA Input File Format 13 3 3 Main Input Commands amp MAIN COMMANDS amp TASK amp JOINT amp MATERIAL amp GEOMETRY amp ELEMENT amp DELETE amp FUNCTION amp
273. put File Format 197 ELEMENT LOAD Data for element load such as element initial stress strain load body boundary load prestressing applied to elements Table 127 Output type keywords understood by the command amp OUTPUT for the location type ELEMENTS Output keyword ELEMENT INCIDENCES Element incidences i e element nodal connectivity CRACK ATTRIBUTES Crack attributes at IP See ATENA 2D User s Manual section 2 8 5 29 Results Load step i Elements Crack attributes for details ELEMENT MATERIAL TYPES Material types at element integration points BEAM NL MIDPOINT PARAMS Several parameters describing element state conditions for CCBeam3D element at its middle point only for beam with a material derived from CCBeamBaseMaterial Table 128 Output type keywords understood by the command amp OUTPUT for the location type ELEMENT PS Output keyword IP COORDINATES Coordinates of element internal points i e material integration points DISPLACEMENTS AT IPS Element displacements at its integration points STRAIN Green Lagrange strains i e total strains minus initial trains due to temperature load and initial strains load TOTAL STRAIN Total strains corresponding to the deformations PRINCIPAL STRAIN Principal engineering strains STRESS Element stresses PRINCIPAL STRESS Principal element stresses
274. put File Format 237 4 10 Preprocessor commands The following section describes ATENA commands for the ATENA native preprocessor to generate FE models These include mainly commands for running T3D preprocessor and commands for generating reinforcement bars through the analysed structure Syntax amp PREPROCESS amp T3D SPEC amp T3D EXPAND amp MACRO JOINT amp MACRO ELEMENT SPEC 4 10 1 The Command amp T3D SPEC T3D FEM mesh generator has been incorporated into ATENA It is a powerful 3D generator for generating nodes and elements of a FE model All the T3D related commands must be enclosed between T3D GENERATE and T3D END or T3D GENERATE and RETURN ATENA input commands The main idea of the generation is to define macro nodes macro lines patches etc that are subsequently used to generate 3D regions Patch and surface type domains are supported as well The current implementation of the generator can also be used to generate lists of nodes see command amp SELECTION Such list is then simply used for definition of Dirichlet and Von Neumann boundary conditions see subcommands amp LOAD PLACE and amp LOAD VALUE commands amp LOAD DISPLACEMENT amp LOAD FORCE All T3D related commands are described in a separate PDF document The T3D command line options see Chapter 7 of T3D documentation should follow T3D GENERATE command They must not change in all subsequent call T3D GENERATE command The following are new feature
275. r the transport analysis 12 3 e amp CCStructuresDynamic module related commands i e commands for dynamic analysis of structures including eigenvalues and eigenvectors analysis It inherits also a few commands from creep and transport analysis 2 General Rules The following lines introduce general rules for composing Atena and Atena Pollute Transport input commands and syntax that is used to describe them Each command has form of a sentence not terminated by dot The command consists of several tokens or words separated by one or more spaces or CR LF characters Tokens written in upper case letters with the 1 character being alphabetic denote keywords e g DELETE Tokens starting with amp character refer to a more complicated input structures described elsewhere in the manual They are not ATENA commands rather they are to be replaced with an input structure they refer to This syntax is used to simplify description of complicated commands Cross references to these input structures are indicated by amp character Tokens written in lower case italic letters denote value parameters 1 e nodal coordinate If name of such a token is enclosed in quotes a string value in quotes is expected i e file name otherwise numerical value is expected Numerical tokens starting with n or i indicate integer values whilst parameters starting with x denote real value Interpretation of Atena keywords is case insensitive O
276. ral behavior step length new pow reference number of iteration last number of iteration 1 2 LENGTH VARIABLE CONSERVATIVE 1 4 Adjusts step length for each load step based on the previous structural behavior 40 step length new pow reference number of iteration last number of iteration 1 4 ARC LENGTH VARIABLE PROGRESSIVE Adjusts step length for each load step based on the previous structural behavior step length new pow last number of iteration reference number of iteration 1 2 REFERENCE NUMBER OF ITERATIONS n Set optimum number of iterations per load step to This value is used in Arc Length optimization of step length By default it 1s set to n 5 amp LOAD DISPLACEMENT RATIO LOAD DISPLACEMENT RATIO x LOADING DISPLACEMENT RATIO CONSTANT LOADING DISPLACEMENT SCALE CONSTANT LOADING DISPLACEMENT BERGAN CONSTANT Table 22 amp LOAD DISPLACEMENT RATIO sub command parameters Parameter Description LOAD DISPLACEMENT Sets the parameter fai to x By default it is 0 2 RATIO x LOADING DISPLACEMENT The SW first i e in the 1 load increment calculates RATIO CONSTANT scaling factor B PratioAA Al displacements where AX 1l Adisplacements is derived from the loading increment The calculated p is afterwards kept constant The ratio Al displacements AX is called bergan coefficient LOADING DISPLACEMENT Adjusts B see the previous option for each new lo
277. rameter kz Units None Acceptable range lt 0 maximal real number gt Default value 6 4 Microplane parameter ky Units None Acceptable range lt 0 maximal real number gt Default value 450 Ultimate shrinkage of thin cement paste on humidity 0 4 Units None Default value 0 00377 Volume fraction of aggregate 138 Default value 0 8 Reference compressive strength in MPa Units MPa Default value 39 42 MPa The time when shrinkage started in days Units days Default value 28 MS related extra parameters related to the material point size PSI x Ratio of the characteristic size of the material to the size of the current element Units None Default value 1 Vx the ratio of the vertical line which approximates fracture affinity to epsilon plastic Units None Default value 1 Dx affinity scaling factor for the deviatoric stress boundary Units None Default value 1 ETA Nx affinity scaling factor for the normal stress boundary Units None Default value 1 MY UI x the ratio between ET and ED Units None value 1 Miscellaneous 421 Material density Units M P Acceptable range 0 maximal real number Default value 0 00785 f f ALPHA x Coefficient of thermal expansion Units 1 T Acceptable range lt 0 maximal real number ATENA Input File Format 139 NENNEN Default value 0 000012 IDEALISATION Defines the idealisation if material model
278. rface stresses See ATENA 2D User s Manual section 2 8 5 29 Results Load step i Elements Crack attributes for details TENSILE STRENGTH Current values of tensile strength MAXIMAL FRACT STRAIN Maximal value of fracture strain reached during the analysis for each material direction MATERIAL TRANSFORMATION MATRIX Coordinate transformation matrix from global to local material coordinate system CRACKING MODULI Crack opening stiffnesses for each material direction including shear components DIRECTION STATUS Cracking status information for each material direction PERFORMANCE INDEX Relative stress error in the evaluation of the material model YIELD CRUSH INFO Yielding crushing status information SOFT HARD PARAMETER Softening hardening parameter EQ PLASTIC STRAIN Equivalent plastic strain The calculation method depends on the used material model ELEM MASS ACCEL LOAD IN CR Element load increments due to the element s acceleration for a particular step transformed into nodal concentrated forces TOTAL MASS ACCEL LOAD Total element load due to the element s acceleration transformed into nodal concentrated forces BEAM ELEM NL PARAMS A few parameters describing nonlinear behaviour of CCBeam3D elements Table 129 Output type keywords understood by the command amp OUTPUT for the location type ELEMENT NODES Output keywor
279. riod T b from Eurocode called T b in Eurocode Units time Default 0 PERIOD T Cx Time period T c from Eurocode called T b in Eurocode Units time Default 0 PERIOD T Dx Time period T b from Eurocode called T d in Eurocode Units time ATENA Input File Format 233 Default 0 ETA FACTOR x Damping correction factor from Eurocode called eta in Eurocode Units time Default 1 i e 5 of viscous damping Dynamic amplification factor to calculate elastic response spectrum Se T Units none Default 2 5 SOIL FACTOR x Soil factor from Eurocode called S in Eurocode Units time Default 0 ACCEL GROUND x Ground acceleration ULS called a g in Eurocode Units length time Default 0 ACCEL GROUND Dx Ground acceleration DLS called a Dg in Eurocode Units length time Default 0 P Dx Relative displacement stopping value called p din Eurocode Units none Default 1 5 P Fx Relative force drop down coefficient to violate PO ULS criterion called p f in Eurocode Units none Default 0 8 EXT P Fx Relative force drop down coefficient to declare the analysis unstable and stop the execution Units none Default 0 2 PO STOP ONLY IF UNSTABLE FLA If 1 1 the analysis continues until the stability G n criterion is failed irrespective of the pushover analysis status 234 If n 0 the pushover analysis is completed based o
280. rmine a suitable idealisation based on the dimension of the material model and the dimension of the finite element where it is used So in most cases it is not needed to use this command In certain cases however the program cannot determine correctly the idealisation to use such a case is for instance if a 3D model is to be used in 2D element Then it is necessary to directly specify if plane stress or strain idealisation is to be used Syntax amp DRUCKER PRAGER PLASTICITY TYPE CC3DDruckerPragerPlasticity Ex MU POISSON NY x Kx ALPHA DPx WDx BETAx RHOx ALPHAx IDEALISATION ID PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D DAMPING MASS xyDAMPING STIFF 122 The parameters for this material model can be generated based on compressive and tensile strength of the material R and R see Table 74 These values should be specified in MPa and then transformed to the current units Table 74 amp DRUCKER PRAGER PLASTICITY sub command parameters Parameter a Basic Elastic modulus Units 17 Acceptable range 0 maximal real number gt Default value 30 x 10 f f Generation formula 6000 15 5 DENS fel fy this formula is valid only if 15 compressive cube strength given as positive number in MPa MU POISSON NY Poisson s ratio Units none Acceptable range lt 0 0 5 Default value 0 2 ALPHA DP x Drucker Prager criterion parameter Units
281. rocessing Starting from ATENA version 5 AtenaWin program is replaced by ATENA Studio Please check the program documentation of these programs for more details 10 AtenaWinD AtenaWin execution for dynamics analysis AtenaWinC AtenaWin execution for Creep analysis AtenaWinT AtenaWin execution for Transport analysis AtenaWin 64 bit execution AtenaWin64 Basic AtenaWin command for 64 bit execution by default executes statics analysis AtenaWinD64 AtenaWin 64 bit execution for dynamics analysis AtenaWinC64 AtenaWin 64 bit execution for creep analysis AtenaWinT64 AtenaWin 64 bit execution for transport analysis ATENA Studio 32 bit execution AtenaStudio Start 32 bit ATENA Studio the analysis type can be selected in a dialog ATENA Studio 64 bit execution AtenaStudi064 Start 64 bit ATENA Studio the analysis type can be selected in a dialog ATENA Input File Format 3 INPUT COMMANDS 11 3 1 Changes of Input Commands Syntax in the New Version With few exceptions the current version of ATENA uses the same syntax of input commands the previous version did The modified input command relates to e amp OUTPUT commands The keywords for locations changed as follows The old keyword The new keyword ATTRIBUTE OUTPUT DATA LOAD LOAD CASES ELEMENT ELEMENTS ELEMENT IP ELEMENT IPS NODE NODES ELEMENT NODE ELEMENT NODES LOA
282. s length Default value 0 0 STIRRUPS AREA x Area of reinforcement stirrups typically 2 x stirrup area Units length Default value 0 0 STIRRUPS MATERIAL 14 of material froim which the tirrups are made Units none Default value NONE STIRRUPS K Ix Coefficient k Typically no change is needed ATENA Input File Format 171 Units none Default value 0 15 STIRRUPS NI 1x Coefficient of compressive strut strength Typically no change is needed Units none Default value based on f STIRRUPS EFFECTIV Effective depth of the section typically distance between the E DEPTH x centre of the longitudinal reinforcement and the top edge Typically no change is needed Units length Default value calculated automatically STIRRUPS C RD Coefficient based on National annex Typically no change is needed Units none Default value 0 2 E STIRRUPS NI MIN x Minimal shear strength Typically no change is needed 0 035 k f Default value v min 4 3 14 3 Sub command amp BEAM REINF BAR MATERIAL This model can be used for nonlinear analysis of reinforced concrete structures modeled by CCBeam elements It is used for reinforcement part i e steel The solid part shoud be modeled by either CCBeamMasonryMaterial or CCBeamRCMaterial The material conforms with recommendation given by Eurocode and similar codes for practice Syntax amp BEAM REINF BAR MATERIAL TYPE CCReinfBarMaterial E x
283. s unique name that conforms with object class name into which the macroelement is coded This name must be input exactly and is case sensitive Again the same applies for finite element types Table 155 amp MACRO ELEMENT supported types CCIsoMacroElement Macroelement to generate a block of elements of a general hexahedral shape 3D case or a quadrilateral shape 2D case CCCopyElementSelection Macroelement to create one or more copies of already generated elements The copied elements can be rotated shifted and translated CCExtrudeElementSelection Macroelement to generate elements as an extrusion from a specified surface Used advantageously to generate interphase elements between surfaces of two solid blocks CCDiscreteReinforcementME Macroelement definition of discrete reinforcement bars This macroelement definition supersedes the legacy REINFORCEMENT BAR id GENERATTE command CCDiscretePlaneReinforcementME Macroelement definition of discrete reinforcement smeared planes more macroelement types to come soon 246 4 10 4 1 Macroelement common data These are input for all macroelement types irrespective of their type Macroelement specific input MACRO ELEM DATA SPEC is described later for each type separately Syntax amp MACRO ELEMENT MACRO ELEMENT melem_id amp GENERATE SPEC amp UPDATE SPEC amp DELETE SPEC amp GENERATE SPEC GENERATE TYPE type str THROUGH NODES mnode id
284. s and coordinates are input in real coordina system with origin in the left bottom corner amp LAYERED SHELL GEOMETRY SPEC LayeredShel DETECT DEPTH DETECT VECTOR 2 3 REF IDS node node2 REF VECTOR x yz INTERFACE interface nodes list SOLID REINFORCEMENT LAYER n MATERIAL mat id THICKNESS thick POSITION pos SAME AS layer id REF THICK x REDUCE XZ YZ REDUCE XY FULL TAU j THICKNESS EQN string REDUCE TAU XY Reduce shears by the factor 0 85 REDUCE TAU XZ FULL TAU Table 47 amp LAYERED SHELL SPEC sub command parameters Parameter Description SOLID The data that follow specify a solid ie concrete or 7c 0m reinforcement i e steel a LAYERS n Id of an input 3 MATERIAL mat 141 Parameters specification for the layer n THICKNESS thick POSITION pos Material specification Material type at an integration point can be defined as follows ordered in terms of priority 1 For each integration point separately refer to amp ELEMENT MATERIALS 2 By layers i e all IPs within the layer share the same material mat id This achieved this subcommand using MATERIAL mat id 3 Use a default material defined by element group definition command refer to amp ELEMENT GROUP Layer thickness thick Layer thickness for both solid and reinforcement layers is defined in
285. s of T3D that have not been yet documented in it 4 10 1 1 The NODEPROP ELEMPROP parameter Commands CURVE SURFACE PATCH SHELL and REGION can now include additional parameters NODEPROP nodeprop ELEMPROP elemprop In similar way the command VERTEX can additionally include NODEPROP nodeprop The parameter NODEPROP and or ELEMPROP is used to generate the above mentioned selection lists Such a list is given name nodeprop resp elemprop notice use of single quote instead of usual double quote and it will contain identification ids of all internal FE nodes resp elements that were used to generate the T3D entity with the additional parameters Specify the parameters NODEPROP and ELEMPROP also for boundary entities such as for surfaces of T3D region if the generated list should include also boundary nodes and elements of the T3D entity 238 4 10 1 2 The subcommand RETURN There is a new T3D command RETURN It is similar to T3D_END in that it forces command parser to return from T3D back to ATENA However T3D_END generates FE mesh before it returns whilst RETURN does not Use the command RETURN to specify T3D commands that for some reason are mixed with ATENA commands 4 10 1 3 The parameter ELEMGROUP The commands CURVE SURFACE PATCH SHELL and REGION include additional parameter ELEMGROUP The syntax is as follows CURVE curve id ELEMGROUP fruss group id SURFACE
286. s on the used material model ELEM INIT STRAIN INCR TOTAL ELEM INIT STRAIN ELEM INIT STRESS INCR TOTAL ELEM INIT STRESS ELEM TEMPERATURE INC R ELEM TOTAL TEMPERATU RE Current element initial strain increment total from all loads for the current time step Current element initial total strain total from all loads and all time steps Current element initial stress increment total from all loads for the current time step Current element initial total stress total from all loads and all time steps Current element incrementally applied temperatures total from all loads for the current time step Total temperatures EIGENVECTORS x Structure eigenvectors of the mode EIGENVECTORS 1 to print the 1 eigenvector e g IMPERFECTIONS Incremental values of imperfect structural geometry with regards to its reference coordinates ACCELERATION Total nodal accelerations within dynamic analysis Note the difference other BCs are typically input as an increment per step VELOCITIES Total nodal accelerations within dynamic analysis Note the difference other BCs are typically input as an increment per step ELEM MASS ACCEL LOAD INCR Element load increments due to the elements acceleration for a particular step transformed into nodal concentrated forces TOTAL MASS ACCEL LOA D Total element load due to the element s acceleration transformed into nodal concentr
287. s the idealisation if material model with higher dimension is to be used in a finite element with lower dimension For instance in case a 3D model is to be used in 2D configuration Units none Acceptable range 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D Default value program tries to determine a suitable idealisation based on the dimension of the material model and the dimension of the finite element where it is used So in most cases it is not needed to use this command In certain cases however the program cannot determine correctly the idealisation to use such a case is for instance if a 3D model is to be used in 2D element Then it is necessary to directly specify if plane stress or strain idealisation is to be used Microplane internal parameters Program contains default values for these parameters but the expert users or users familiar with the original work can modify them directly in order to obtain a better fit with experimental data Syntax Cx x Default values see theory manual for details 136 cl 6 20e 1 Normal bound param c2 2 76 Normal bound param c3 4 00 Normal plasticity EB c4 70 00 Strain ratio normal vol c5 2 50 dev bound param c6 1 30 Comp dev bound yield c7 50 00 Deviatoric plasticity D c8 8 00 Compressive strength FCP c9 1 30 Dev bound param c10 7 30e 1 Fric b initial slope 11 2 00 1 Fric bsig N inter sig_V 0 c12 7 0
288. s typically measured in a laboratory CCModelFIB MC2010 model by CEB fib bulletin 65 from the year 2010 CCModelEN1992 creep model by Eurocode EN1992 1 1 2006 amp COMBINED MATERIAL This material can be used to create a composite material consisting of various components such as for instance concrete with smeared reinforcement in various directions Unlimited number of components can be specified Output data for each component are then indicated by the label 7 Where i indicates a value of the i th component amp VARIABLE MATERIAL This material can be used as an envelope for other materials whose parameters are not constant during the analysis function depending on time or load step can be specified for any material parameter This can be used only in the connection with fully incremental materials amp MATERIAL WITH TEMP DEP P This material can be used as an envelope for ROPERTIES other materials whose parameters depend on temperature This can be used only in the connection with fully incremental materials amp MATERIAL WITH RANDOM FIE This material can be used to simulate the random LDS spatial distribution of selected material parameters amp BEAM MASONRY MATERIAL Material for reinforced masonry structures modeled by CCBeal material ATENA Input File Format 73 amp BEAM MATERIAL Material for reinforced structures modeled by CCBeal material amp try reduce MyMz keep NBEAM Mater
289. s2 2D IsoTruss3 2D axisymmetric CCIsoTruss3 2D 266 IsoTruss2_3D CCIsoTruss2 3D IsoTruss3 3D CCIsoTruss3 3D IsoTruss2 ASym CCIsoTruss2 ASym IsoTruss3 ASym CCIsoTruss3 ASym Table 166 Finite elements to transport analysis with Gaussian integration Element Description Equivalent element for static analysis with the same geomet IsoQuadGauss4 2 2D quadrilateral isoparametric elements CCIsoQuad4 2D D CCIsoQuad9_2D IsoQuad Gauss 9 2D IsoQuad Gauss Axisymmetric quadrilateral isoparametric CCIsoQuad4_Asym 4 Asym elements CCIsoQuad9_ASym IsoQuad Gauss 9 2ASym IsoTriangle Gauss 2D triangular isoparametric elements CCIsoTriangle3 2D 3 2D CCIsoTriangle6 2D IsoTriangle Gauss 6 2D IsoTriangle Gauss Axisymmetric triangular isoparametric elements CCIsoTriangle3 ASy 3 ASym m IsoTriangle Gauss CCIsoTriangle6 ASy IsoBrick Gauss Hexahedral isoparametric elements CCIsoBrick8 3D 8 3D CCIsoBrick8 3D IsoBrick Gauss 20 3D IsoWedge Gauss Wedge isoparametric elements CCIsoWedge6 3D 6 3D CCIsoWedgel5 3D ATENA Input File Format 267 IsoWedge Gauss 15 3D IsoTetra Gauss Tetrahedral isoparametric elements CCIsoTetra4 3D 4 3D CCIsoTetral0 3D IsoTetra Gauss 10 3D 4 11 3 Transport initial values of state variables Each transient analysis the transport analysis included needs to know initial values of the structural state variables prior any execution This is achieved by the fol
290. section negative Units none Default value 0 002 LAMBDA x Coefficient to reduce compressed masonry area Units none Default value 1 ETAx Coefficient to apply for F_D Units none Default value 0 8 REL TOL x Relative acceptable error in moments forces Units none Default value 0 001 Maximum number of iterations for zeroizing of lateral bending moment Note that the moments are calculated in a coordinate system whose Y axis is parallel to the resultant moment from 170 M and load Therefore moment along Z must be equal Zero Units none Default value 20 EPS SMALL x Strain value already assumed neglibable Units none Default value 0 001 ALPHA STEP x Angle step for resultant moment load at which the M N diagram of cross section is cached For zero or negative value nthing is cached and the appropriate M N diragram is calculated on run time basis Units none Default value 2 60 ALPHA TOL x Angle difference for resultatnt moment load thas is assumed negligible Units none Default value 360 FLEX DRIFT COEFF x Coefficinet to check maximum flexural drift If the criterion violated corresponding beam s moments are reduced to zero Units none Default value 0 008 SHEAR DRIFT COEFF Coefficinet to check maximum shear drift If the criterion x violated corresponding beam s shear forces are reduced to zero Units none Default value 0 004 STIRRUPS SPACING x Stirrups spacing Unit
291. sed on the dimension of the material model and the dimension of the finite element where it is used So in most cases it is not needed to use this command In certain cases however the program cannot determine correctly the idealisation to use such a case 15 for instance if a 3D model is to be used in 2D element Then it is necessary to directly specify if plane stress or strain idealisation 1s to be used DAMPING MASS xy Mass and stiffness damping factors specified for indiviual DAMPING STIFF xx element group They overwrite the same factor set for the whole structure by SET command 4 3 2 2 Sub command amp 3DNONLINCEMENTITIOUS amp 3DNONLINCEMENTITIOUS TYPE CC3DNonLinCementitious Ex MU POISSON NY x FT RT F TIR Tj x FCJRCJF CJR Cjx CO R GF CRACK SPACING TENSION STIFF x WD x EPS CPx EXCx BETAx RHOx ALPHA x FT MULTIP x SHEAR FACTOR x UNLOADING x IDEALISATION 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D DAMPING MASS xyDAMPING STIFF xy The parameters for this material model can be generated based on compressive cube strength of concrete see Table 65 This value should be specified in MPa and then transformed to the current units Table 65 amp 3DNONLINCEMENTITIOUS sub command parameters Parameter Description Basic properties Ex Elastic modulus Units 17 Acceptable range 0 maximal real number Default value 30 x 10 f
292. should be skipped i e which dofs should not be affected by the current master slave condition Displacement X y rotation z corresponds to 0b1 0b10 06100000 For example let us want to constrain 178 only displacements x y and rotation y of nodes with 6 dofs 3 displacements and three rotations Using binary biwise notation we need to constrain dofs 0b010011 The skip mask is complement of 0b010011 i e 0b101100 Hence you must input skip mask as integer number 44 0b101100 0x2C 44 amp LOAD VALUE VALUE value CONST const COEFF coeff x COEFF coeff y COEFF Zcoeff 2 Table 110 LOAD VALUE description This command can be used to define a general spatial distribution of loads in the form f x 2 const xcoeff x ycoeff y zcoeff z value amp SLAVE NODES SLAVE NODE n DOF i amp MASTER NODES MASTER NODE n DOF i x amp LOAD PLACE NODE node SELECTION ist name DOF idof amp LOAD FUNCTION INCREMENT TOTAL FUNCTION i Table 111 LOAD FUNCTION description Most boundary conditions specified by command structure amp LOAD can be adjusted according to the current time The adjustment is defined by a time dependent functions specified by amp LOAD FUNCTION which in fact specifies a coefficient for the given boundary condition The actual coefficint for mutiplying the load is calculated as follows C E pm t hes t
293. sion VT ZEQN eqn expression NUMBER OF IPS IN Ra SOLID HEIGHTS NUMBER n VALUES vall val2 val WIDTHS NUMBER n VALUES vall val2 val DOMAINS NUMBER n MATERIAL 0 QUAD IDS FROM n TO n BY n AT n LIST i7 i2 REINFORCEMENT BARS NUMBER n MATERIAL mat id ST AREA a S COORDsT COORD REDUCE XY REDUCE XZ FULL TAU Table 49 amp BEAM 1D GEOMETRY SPEC sub command parameters Parameter Description SOLID The data that follow specify a solid ie concrete or REINFORCEMENT reinforcement i e steel layer HEIGHTS NUMBER n Total number of solid heights i e number of rows of the s t VALUES vall val2 val n raster It is followed of actual height values Isoparametric coordinates are used Otherwise the input heights are scaled so that their sum will equal to 2 WIDTHS NUMBER n Ditto for widths VALUES vall val2 val n DOMAINS NUMBER n Definition of material domains The quad ids are counted MATERIAL n 0 rowvise starting from the bottom left corner If material id is QUAD IDS FROM 7 TO zero a hole is assumed n BY n AT n LIST REINFORCEMENT Number of reinforcement bars i e quads where BARS NUMBER n reinforcement is assumed 60 MATERIAL mat_id ST AREA a S COORD s T COORD For n bars specify its material id area and position via s t coordinates Isoparametric coordinates are used otherwise the scaling factors are applied T
294. slips may change as a consequence of an additional cable deformation However the nodal slips at the cable ends will remain the same i e they are fixed Presstresing orientation can be also input via amp EXTERNAL CABLE GEOMETRY SPEC however such info is overwritten by orientation info within the amp PRESTRESSING command Fixed prestressing amp FIXED PRESTRESSING is another type of loading that can be used to set cable prestressing This is useful if the cable prestress losses are calculated by a third party software In fact this type of loading is equivalent to ELEMENT INITIAL STRESS LOAD load whereby the prestress value is input as a function of the longitudinal bar coordinate s If this coordinate has the same orientation as the reinforcement bar incidences than use DIRECTION START TO END Otherwise use DIRECTION END TO START This type of loading allow to prescribe only local sig xx stress It is specified as prestress increment Fixed prestressing as a fuction of the longitudinal coordinaye can be specified directly whithin thi scommand or a seperate funtion can be used ATENA Input File Format 183 Prestraining of external cable by per element specified initial strain amp FIXED PRESTRAINING It is specified as prestrain increment Special type of element load is introduced by amp ELEMENT INITIAL GAP LOAD This load is used for gaps that are initially open Size of the openning is derived from the gap element s thickness
295. so creates additional set of lists using the automated name generation This mode is used to automatically create selection lists of finite nodes and elements for all geometrical entities used in the T3D model e g vertices curves etc Defines suffix string All subsequently compiled names of expanded selection lists will be given names that equal the original T3D selection lists names appended by expand str Default amp T Example Expanded In this case e g an original selection list name Curve 1 will expand to Curve 1 Expanded Defines suffix string All subsequently compiled names of selection lists with elements ids will be accompanied also by selection lists with group ids and they will be given names that equal the original T3D element ids selection list appended by group str Default amp G Example AssocGroups In this case e g an original selection list name Curve 1 will expand to Curve 1 AssocGroups 242 DEF VERTEX FMT FOR NODES Defines formatting string akin the language vertex _fmt DEF MNODE FMT FOR NODES mnode_fmt DEF CURVE FMT FOR NODES curve fmt DEF PATCH FMT FOR NODES patch fmt printf function subsequently T3D generated names of selection lists that includes list of nodes associated with vertices will be assigned a name that equal to str Format vertex fmt vertex id If a vertex has got explicitly specified the nodeprop
296. soShellTriangle lt xxx gt CCIsoShellTriangle lt xxxx gt CCIsoBeamBrick12 3D CCIsoBeamBrick8 3D 65 shape Similar to the implemented CCAhmad elements it is also input as a 3D hexahedral box Nevertheless the usual axial nodal points are available e g for checking resulting deformations and rotations They are generated automatically 3D linear beam element The element is assumed for a simplified analysis with CCBeamMasonry and CCBeamR Material materials Isoparametric 1D beam element with 2 or three nodes The elements are similar to CCBeamNL but they are modelled as a bar 1D element It resembles CCBeamNL element type without its nodes 1 12 to model element s 3D shape Isoparametric full 3D shell element hexahedral curvilinear shape They are compatible with the same materials as are CCIsoBrick elements Unlike CCAhmadElement elements it uses everywhere native 3dofs per node ie no additional constraint of the element s bottom is needed E g CCIsoShellBrick Xxxxxxxxxxxxxxxxxxx Isoparametric full 3D shell element wedge curvilinear shape They are compatible with the same materials as are CCIsoBrick elements Unlike CCAhmadElement elements it uses everywhere native 3dofs per node i e no additional constraint of the element s bottom is needed E g CCIsoShellBrick lt xxxxxxxxxxxx gt Nonlinear shell elements similar to Ahmad elements however they are specified by 2D curvilinear surface In each nod
297. sons Examples BREAK Joints coordinates read BREAK ID 1 BREAK AT MODULE CCFEModel ID 2 IGNORE HITS 3 3 4 1 The Command amp JUMP amp LABEL Syntax amp JUMP JUMP TO LABEL string with label name amp LABEL LABEL string with label name The first command instructs Atena to ignore all subsequent input data until the second command is found Thereafter the input commands are processed in the usual way Several amp JUMP amp LABEL commands can be used in the same file providing they have unique string with label name Note that amp LABEL commands are ignored unless a amp JUMP command is being processed 3 4 2 The Command amp DEBUG Syntax amp DEBUG DEBUG ON OFF ATENA Input File Format 17 Set debug mode on off If it is on the execution stops after processing of each main command from input stream The next command is executed by pressing Execute after break button or alternatively press Execute from the cursor position button to execute a command at the current cursor position 3 4 3 The Command amp EVALUATE Syntax amp EVALUATE EVALUATE EVAL expression string This command calculates command from expression string and output the result to Atena output file It has the following features Operators amp lt lt gt gt gt lt gt lt Pa Functions Abs Exp Sign Sqrt Log Log10 Sin Cos Tan ASin ACos ATan Factorial Erf ErfInv A
298. ss local coordinate system Note that X local coordinate axis corresponds to beam direction and Y local axis 15 perpendicular to X and Z E g DIR Xx Y coordinate of a vector defining Z axis of beam truss local coordinate system E g DIR Y x ATENA Input File Format 55 Z coordinate of a vector defining Z axis of beam truss local coordinate system E g DIR Zx SIZE LOCAL Y Cross sectional width in direction of the local Y axis Either of WIDTH x the two keywords can be used E g WIDTH 0 25 SIZE LOCAL Z HEI Cross sectional height in direction of the local Z axis Either of x the two keywords can be used E g HEIGHT 0 25 KIRCHHOFF MINDLI Definition of which modification of the beam FE model should N TIMOSHENKO TI be used By default TIMISHERNKO element is selected It is MOSHENKO CSF the only one element that supports nonlinearity The others ignore it REDUCE TM STIFF Flag for simulating process of material cracking If it is set on REDUCE MT STIFF flexural and bending stiffness of the beam element is reduced REDUCE TM COEFF by x By default it is off i e full stiffness is applied Default REDUCE TM COEFF x value of the reduction coefficient is 0 5 i e 50 reduction is See used Either of the two keywords can be used Coefficient for buckling length of comperessed columns By default it is 1 E g RO N0 5 EFF WIDTH FACTOR x Coefficient for buckling widtf of
299. stant acceleration in a particular direction having been input within this load specification This load is meanigful in dynamic analysis only and because of its total character it must be specified in the group of fixed load within the dynamic load step definition i e not among increment loads The element load is aplied to element groups specified by GROUP group id TO group id to BY group id by command tokens Otherwise all element groups are loaded For each element group it is possible to load only some elements Their list is input in ELEMENT SELECTION ist name command tokens If the list contains a non existing element the corresponding entry is ignored Alternatively the loaded elements can be input in form of interval ELEMENT element id TO element id to BY element id by In this case however one have to be cautious element id TO element id to must exist in the group group id For the remaining element groups i e up to group id to internal element numbering is used E g let group group id has elements 100 105 108 110 120 130 and element id 105 element id 10 110 Then the remaining loaded element groups i e groups up to group id to receive the load into their second third and forth element The elements within each group are sorted according to their element id As usuallly by default all elements of the group are loaded In addition it is possible to use linear spatial interpolation based on the el
300. stem of say 200000 equations location is reported for each 20000th equation e g 1 20001 40001 By default these information are enabled and location progress is reported always so that the user has gets the best info about the analysis This settings however involves some CPU overhead To maximize the execution speed disable these reports EXTERNAL IDENTIFIERS Set the way how Atena entities are are identified INTERNAL IDENTIFIERS If external identifiers are required Atena uses ids specified in the iput file If intenal identifiers are required Atena uses internal ids starting from 1 to number of a particular entities Under normal conditions internal ids should not be used USE BEST ITERATION FOR CRITE For gt 0 and the iterating process within the RION current step does not yield a converged solution USE BEST ITERATION FOR CRITE then the solution is reverted to the best converged n n2 iteration based on the convergence criteria n2 For 0 the use of best iteration is reset to not using best iteration feature ATENA Input File Format 27 If divergence step s or iteration s stop criteria are met the current step is marked as non converged When this option is combined with STEP LOAD REDUCTION ALLOWANCE n then the iteration is reverted only when n number of attempts to revert the current step 0 By default n 0 i e this feature is N A and v 1 i e the step
301. step length related to the step length in the previous step If the x value is ATENA Input File Format 39 negative this check is ignored By default 1 MIN REL REF STEP LENGTH x Set minimum and or maximum value of MAX REL REF STEP LENGTH x current step length related to the step length in firrst previous Arc Length Line Srearch step If the x value is negative this check is ignored By default x 1 DLAMBDA MINx DLAMBDA MAXx Set minimum and or maximum value of delta A step load increment factor If the x value is negative this check is ignored By default x 1 This input can be overwritten by MIN_STEP_LENGTH and MAX STEP LENGTH REF DLAMBDA MIN Set minimum and or maximum value of delta REF DLAMBDA MAX x A step load increment factor with respepect to reference load If the x value is negative this check is ignored By default x 1 This input can be overwritten by MIN STEP LENGTH and MAX STEP LENGTH amp ARC LENGTH OPTIMISATION LENGTH CONSTANT ARC LENGTH VARIABLE CONSERVATIVE 1 2 LENGTH VARIABLE CONSERVATIVE 1 4 ARC LENGTH VARIABLE PROGRESSIVE REFERENCE NUMBER OF ITERATIONS Table 21 amp ARC LENGTH OPTIMISATION sub command parameters Parameter Description ARC LENGTH CONSTANT For the current step use step length unchanged from the previous step LENGTH VARIABLE CONSERVATIVE 1 2 Adjusts step length for each load step based on the previous structu
302. such a case is for instance if a 3D model is to be used in 2D element Then it is necessary to directly specify if plane stress or strain 110 idealisation is to be used DAMPING MASS xy Mass and stiffness damping factors specified for indiviual DAMPING STIFF xx element group They overwrite the same factor set for the whole structure by SET command 4 3 2 8 Sub command amp 3DNONLINCEMENTITIOUS3 amp 3DNONLINCEMENTITIOUS3 TYPE CC3DNonLinCementitious3 Ex POISSON NY F T R T x FC RC F CJR C GFx CRACK SPACING x TENSION STIFFENING x EPS VPx FCO RCO F CO x SOFT Tx EXCx Ax Bx Cx ORDER x RHO x ALPHA x FT MULT x SHEAR FACTOR x UNLOADING x IDEALISATION 1D PLANE STRESS PLANE STRAIN AXISYMMETRIC 3D DAMPING MASS xy DAMPING STIFF xx This material is an advanced version of 3DNONLINCEMENTITIOUS2 material that can handle the increased deformation capacity of concrete under triaxial compression It is suitable for problems including confinement effects The parameters for this material model can be calibrated based on compressive cylinder strength of concrete Recommended values for various concrete compressive strengths are listed in the table after the parameter descriptions Table 71 amp 3DNONLINCEMENTITIOUS3 sub command parameters Parameter Description Basic properties Ex Elastic modulus Units MPa Acceptable range 0 maximal real number gt
303. t DEF BAR REINFORCEMENT FMT FOR NODES rc fint DEF BAR REINFORCEMENT FMT FOR PRINCIPAL NODES prc fint DEF CURVE FMT FOR ELEMENTS curve fint DEF PATCH FMT FOR ELEMENTS patch fint DEF SURFACE FMT FOR ELEMENTS surface fmt DEF SHELL FMT FOR ELEMENTS shell fint DEF REGION FMT FOR ELEMENTS region fint DEF MELEMENT FMT FOR ELEMENTS fint DEF BAR REINFORCEMENT FMT FOR ELEMENTS c fint amp T3D EXPAND ENTITY CURVE SURFACE SHELL PATCH REGION entity idl ATENA Input File Format 241 Table 153 amp T3D EXPAND SELECTIONS command parameters PROP GENERATION NONE SEMIATOMATIC AUTOMATIC EXPAND SUFFIX expand str GROUP SUFFIX group str Specify mode for creation selection lists of finite nodes and finite elements that are associated with geometrical entities like vertex curve etc NONE means that no expanded lists are created i e a commands akin amp T3D EXPAND SETTINGS are ignored and regular selection lists are created only if NODEPROP or ELEMPROP param is explicitly defined SEMIAUTOMATIC means that regular and expanded selection lists are created only if NODEPROP or ELEMPROP param is explicitly In case of vertices the NODEPROP param need not be explicitly set In that case the automated name generation is invoked using DEF VERTEX FMT FOR NODES AUTOMATIC mode forces to do the same as the SEMIATOMATIC mode does but it al
304. t Note that unlike other types of static loads that are input in incremenental manner the moisture temperaturee boundary load has character of a load potential and thus it must be input in total form Therefore the load describes total moisture temperature load conditions Table 174 MOIST_TEMP_BOUNDARY_LOAD parameters for element load AMBIENT HUMIDITY Ambient air relative humidity Default value 0 6 AMBIENT TEMPERATURE 7 Ambient temperature C Default 20 C CONVECTION W h Convection moisture transfer coefficient kg s m Default value 0 kg s m EVAPORATION MOISTURE Evaporation moisture transfer coefficient kg m s Default value 25 19 v_ 3600 kg s m where v_ is air velocity in ms AIR PRESSURE p Total absolute ambient air pressure Pa sum of BENI partial dry air pressure and partial water vapour pressure Default normal pressure 101325Pa Average ambient air velocity m s Default 0 m s Convection heat transfer coefficient W m2 K Heat emissivity parameter Default value 0 85 EVAPORATION HEAT A Evaporation heat transfer coefficient J kg Default this coefficient is automatically set to consume 2270000 J per 1kg of evaporated water MOIST FUNCTION Id of an user defined time dependent function for moist fnc id ambient moisture ambient temperature and air TEMP FUNCTION tempt fnc id velocity respectively It acts as an extra multiplier AIR VELOCITY FUNCTIO
305. t is specified as any negative value f 28days is calculated by FIB MC2010 based on f 28 days Othewise the value in the base material remains unchanged Default value 0 MPa Short term material Young modulus at 28 days i e inverse compliance at 28 01 days loaded at 28 days kPa It is used by the creep model to predict material compliance t If unspecified the model calculates its value based on 28 Default value calculated from fcy 28 Coefficient of thermal expansion to be used for calculation AT within the creep material Default value 0 Ambient relative humidity 0 3 1 Default value 0 780 DENSITY density Concrete density kg m ATENA Input File Format 151 __ De fautt value 2125 kg m END OF CURING Time at beginning of drying i e end of curing days TIME endcuring Default value 7 days LOAD CURRENT Current or load time for the subsequent measured value TIME tne Default 0 days SHRINKAGE Measured shrinkage material compliance measured val for AU previously specified load and current time Units of water loss measured val must correspond to units of total water loss shrinkage is dimension less and compliance is input in kPa HISTORY TIME For each entry of material history the data time temper and time HUMIDITY humid must be input If the data keywords are used then it humid doesn t matter in which order the 3 data are input
306. ta entity The given value is typically used by the internal ATENA generator when a request for next reference id is processed Note that if it is specified max ref id for group id j max ref id j elements i e the command ELEMENTS SMART IDS MAP FOR GROUP group id max ref id then the group id must be id of an already input element group Any forwards specification is not allowed here Default value 50000 for all queues 4 1 1 The Command amp UNITS Syntax amp UNITS UNITS amp FORCE UNITS TEMPERATURE UNITS LENGTH UNITS amp MASS UNITS amp TIME UNITS units amp FORCE UNITS FORCE kN MN amp TEMPERATURE UNITS TEMPERATURE F K C F K amp LENGTH UNITS LENGTH MM M IN ATENA Input File Format 47 amp MASS UNITS MASS KG TON LB amp TIME UNITS TIME sec day Table 33 Description of available program units Unit type description Supported Units Force units FINN MN kips bf Lengthunits Emm min CER FA KK kg ton I TIME sec day Table 34 Description of derived units Formula based on basic units see 1 day Table 33 Stress pressure S Pa kPa MPa F psi ksi In some parts of the manual the default values of certain material parameters are specified If the parameter is not specified in the input manual the default value is used The used default value depends of coarse on the selected unit set T
307. tan2 Pow SOLVE QUADRATIC EQN SOLVE CUBIC Variables Pi e you can define your own variables e g eval cc 10 eval 5 gt 15 Other Scientific notation supported Error handling supported 18 3 4 4 The Command amp BREAK_DEBUG Syntax amp BREAK DEBUG BREAK DEBUG break id Break execution at specific points This command is typically used to debug an input data file The following data points are recognized Table 4 Table with the recognized execution breakpoints Desired action Value of break id Do not break Break on entry to the main model execution routine Break on exit to the main model execution routine Break on entry to the generator model execution routine Break exit entry to the generator model execution routine Break on entry to the global dofs mapping execution routine Break on entry to the global dofs mapping execution routine Break at any of the above points More break points can be set To do that set break_id as sum of the required individual break points 3 4 5 Command amp SELECTION Syntax amp SELECTION SELECTION destination name CLEAR COMBINE SEPARATE 1841 list2 11513 RENAME FROM AT from id TO to id BY by_id LIST id INSERT INCLUDE selection name EXCLUDE selection name CONNECT REMOVE selection name ACTIVE INACTIVE GROUP group id
308. ter loss at current humidity shrinkage material COMPLIANCE compliance measured val for previously specified load and measured_val current time Units of water loss must correspond to units of total water loss shrinkage is dimension less and compliance is input in kPa t HISTORY TIME For each entry of material history the data fime temper and time HUMIDITY humid must be input If the data keywords are used then it humid doesn t matter in which order the 3 data are input Otherwise the TEMPERATURE indicated order is assumed The units are days degrees Celsius temper y and dimension less humidity in interval 0 3 1 EPS A INF e Autogenous shrinkage at infinity time typically negative Default value 0 TAU A r Half time of autogenous shrinkage Default value 30 days TIME S f Time of final set of cement Default value 5 days A INF h Final self desiccation relatibe humidity Default value 0 8 amp CCModelFIB MC2010 DATA CCModelFIB MC2010 CEMENT CLASS 32 5N 32 5R 42 5N 42 5R 52 5N 52 5R AGGREAGETE BASALTDENSELIMESTONE QUARTZITE LIMESTONE SANDSTONE LIGHTWEIGHTSANDSTONE THICKNESS thick FCYL28 f 5 E28 FCYLO 28 fiag FT28 f C GF28 G ALPHA HUMIDITY humidity DENSITY density END OF CURING TIME endcuring LOAD CURRENT TIME time SHRINKAGE COMPLIANCE measured val HISTORY TIME time HUMIDITY humid TEMPERATURE temper T
309. terial Definition The Command amp MATERIAL Syntax amp MATERIAL MATERIAL ID n NAME material name amp MATERIAL TYPE PARAMS 72 Table 61 amp MATERIAL command parameters Parameter Description IDn Material identification E g ID 1 NAME material_name Material name in quotes also for identification E g NAME my material amp MATERIAL TYPE PARAMS Material type and type specific parameters amp MATERIAL TYPE PARAMS amp LINEAR ELASTIC ISOTROPIC amp 3DCEMENTITIOUS amp 3DNONLINCEMENTITIOUS amp 3DNONLINCEMENTITIOUS2 amp 3DNONLINCEMENTITIOUS2VARIABLE amp 3DNONLINCEMENTITIOUS2USER amp 3DNONLINCEMENTITIOUS2SHCC amp 3DNONLINCEMENTITIOUS2SFATIGUE amp 3DNONLINCEMENTITIOUS3 amp SBETAMATERIAL amp VON MISES PLASTICITY amp USER MATERIAL amp INTERFACE MATERIAL amp REINFORCEMENT amp REINFORCEMENT WITH CYCLING BEHAVIOR amp SMEARED REINFORCEMENT amp SPRING amp DRUCKER PRAGER PLASTICITY amp MICROPLANE amp CREEP MATERIAL amp COMBINED MATERIAL amp VARIABLE MATERIAL amp MATERIAL WITH TEMP DEP PROPERTIES amp MATERIAL WITH RANDOM FIELDS amp BEAM MASONRY MATERIAL amp BEAM RC MATERIAL amp BEAM REINF BAR MATERIAL Table 62 amp MATERIALTYPE PARAMS sub command parameters Parameter Description amp LINEAR ELASTIC ISOTROPIC Linear elastic isotropic materials for 1D Plane Stress Plane Strain Axisymmetric and 3D
310. terial compliance t If unspecified the model calculates its value based on 28 Default value calculated from fcy 28 ALPHA Coefficient of thermal expansion to be used for calculation A amp AT within the creep material Default value 0 HUMIDITY humidity Ambient relative humidity 0 3 1 Default value 0 780 DENSITY density Concrete density kg m Default value 2125 kg m END OF CURING Time at beginning of drying i e end of curing days TIME endcuring Default value 7 days LOAD CURRENT Current or load time for the subsequent measured value TIME time Default 0 days SHRINKAGE Measured shrinkage material compliance measured val for COMPLIANCE previously specified load and current time Units of water loss measured val must correspond to units of total water loss shrinkage is dimension less and compliance is input in kPa HISTORY TIME For each entry of material history the data time temper and time HUMIDITY humid must be input If the data keywords are used then it humid doesn t matter in which order the 3 data are input Otherwise the TEMPERATURE indicated order is assumed The units are days degrees Celsius ATENA Input File Format 149 and dimension less humidity in interval 0 3 1 amp CCModelEN1992 DATA CCModel EN1992 CEMENT CLASS 32 5N 32 5R 42 5N 42 5R 52 5N 52 5R AGGREAGETE BASALTDENSELIMESTONE QUARTZITE LIMEST
311. term of normalized layer coordinates Top and bottom shell surfaces have coordinates n 1 and m 1 respectively Total shell thickness is thus 1 1 2 with respect to which all individual layer thickness is scaled If some solid layers have zero thickness it is automatically ATENA Input File Format 57 generated as 2 sum all solid layers non zero thickness number of solid layers with zero thickness If total sum of solid layers thickness does not equal to 2 all input thick and pos parameters for both solid and reinforcement layers are scaled appropriately Layer position pos It specifies position of the reinforcement layer n Again the normalized layer coordinate is used see above Note that the parameter applies only to reinforcement layers Solid layers do not use the pos parameter as it is assumed that they are located from bottom layer 1 to top the last solid layer of the shell The position is thus defined by their thickness SAME AS layer_id Specifies that the layer n has the same properties as a previously defined layer id DETECT DEPTH Detect depth of shell elements and reorder element s VECTOR 2 incidences If DETECT VECTOR is not specified the depth x3 is chosen to comply with the smallest dimension of the element Otherwise it is chosen to have the smallest angle with the given vector x x2 x3 REF VI IDS node node2 Define position of an arbitrary
312. than 100 days it will be 6 sub steps Default value 2 RETARD TIMES PER Number of retardation times logio of time span Note that DECADE decl retard 15 command affects generation of retardation times by the amp RETARDATION command and hence it must be set beforehand Alternatively this value can be set directly in amp RETARDATION Example If number of retardation times is set to 2 the creep law will be approximated by two points for each time unit in the logarithmic scale This means two approximation points will be used for the time interval between 0 1 day two points for the interval 1 10 days then two points for 10 100 days etc So the proper values will depend on the choice of time units If the time unit is a day the recommended value is 1 2 Default value 1 STOP TIME Time at which the execution should stop days This value must execution stop time be input at leatest or anywhere earlier just before executing a step that should by stopped by this command If it has not been specified ATENA assumes STOP TIME equal to fime end from the amp retardation times command The inputted value of STOP_TIME gets inserted in automaticly generated series of sample times but the higher sample times are not modified Default value 0 days MP Creep analysis method CS METHOD uses simplified CS METHOD approach in which temperature and humidity in a material point depend only on cross secti
313. the COEFFICIENT x CCBarWithMemoryBond elements It determines the maximum bond stress for the unloading branch i e to which value the max bond stress drops after the bond stress sign changes by default the bond strength bond slip envelope is followed during unloading as defined for the loading ATENA Input File Format 53 Admissible values lt x stress units res max where is the residual bond stress last value from the bond strength bond slip function and the maximum bond stress max value from the bond strength bond slip function PRECISION Process of internal iterations will stop if FACTOR x xy gt hus lt error 1 rel displ 9 where Aus is change of slip at cable node i within the last iteration and eror is allowed relative displacement error of the problem see amp CONVERGENCE CRITERIA Default value x 100000 DAMPING FACTOR x Factor for damping during the process of iterative calculation of nodal slips The slips are updated as follow us us x Aus i G i 2 where indicates iteration id and i is cable node id Default value x 1 amp BEAM GEOMETRY SPEC Beam AREA x MOMENT INERTIA Y MOMENT INERTIA Z x MOMENT POLAR x MOMENT TORGUE x MOMENT SHEAR Y x MOMENT SHEAR Zx WINKLER COEFFICIENT C 1 X x WINKLER COEFFICIENT C 1 Y x WINKLER COEFFICIENT C 1 Zx
314. the structure is already stable before applying a new boundary condition and the new condition is used only to deviate the structure from those stable conditions to slightly different conditions Use the basic form for cases when you want connect some macroelements when no master nodes are specified etc The PROCESS FLAG input specifies a special generation of master slave boundary conditions These constraints can be generated using either current or reference coordinate system The first or second method is invoked by inputing the keyword USE CURRENT COORDS or REFERENCE COORDS respectively Modeling construction processes typically generates the following problem we need to connect previously erected and loaded parts of a structure with a part of the structure that is new in the construction step The trouble is that the older part is already deformed and the deformed geometry on the border between the two parts is difficult to figure in the new part Hence ATENA offers to model the new part with undeformed shape and then to copy the border displacements from the old part to the new part It is achived by use of the option COPY DEFORMATION or alternatively COPY DEFORMATION ONCE While the former option ensures copying of border displacements in every step in which this load is employed the latter keyword causes the displacements to be copied only once i e in the next step and thereafter the option of COPY NO DEFORMATION is used a
315. tically The reference temperatures ignores any load coefficient coming from function definition load case multiplier etc The AUTOMATIC option causes Atena to automatically update TARGET and REFERENCE TIME according to time at the current and previous step It is usefull particularly for element tremperature load during creep analysis If AUTOMATIC the load is imported from history files and no additional load is acceptable such as via VALUE and NODE VALUE By default MANUAL regime is assumed The TIME UNITS time units allows to specify which time units were used to calculate and write the transpored analysis results in the file results file name It 1s specified in the same way as in the Unit command By default no time unit conversion is made Initial element strains amp ELEMENT INITIAL STRAIN LOAD usable e g for pre stressed conditions Initial element stresses amp ELEMENT INITIAL STRESS LOAD Prestressing of external cables i e elements CCExternalCable 2D CCExternalCable 3D amp PRESTRESSING The prestressing can be applied near the start node ie the 1 principal node set by PRESTRESSING START end node i e the last principal node set by PRESTRESSING END NODE or near both ends of the cable set by PRESTRESSING START AND END NODE It is specified as prestress increment If it is specified in some steps and not specified in the higher steps then in the higher steps the cable prestressing and nodal
316. ting displacements during iterations either each iteration or each load step amp OPTIMIZE PARAMS Sets whether bandwidth optimization is required and which type amp SERIALIZE PARAMS Set depth of serialization Change of this parameter is needed only under very special Not available in ATENA version 4 3 1 and older 26 conditions and the user would normally use its default setting SOLVE LHS BCS ON Turns on and off an advance LHS BCs SOLVE LHS BCS OFF management By default it is ON Do not change this parameter unless unavoidable and all consequences being well understood SET SOLVER KEYS n This command specifies directly in binary form flags for the non linear solver It is not aimed for direct use by users Every setting can be achieved in a more readable form using other parameters of the amp SET command amp FATIGUE PARAMS Parameters for fatigue analysis amp CREEP ANALYSIS PARAMS Parameters for creep analysis amp DYNAMIC ANALYSIS PARAMS Parameters for dynamic analysis amp MAX REF IDS Set maximum reference ids that are used by the automatic ATENA reference ids generator DISABLE REPORT TASK Disable or enable visualisation of task and ENABLE REPORT TASK location within the current execution It is also ible to report location each n of the total DISABLE REPORT LOCATION possib p ENABLE REPORT LOCATION job For example REPORT LOCATION STEP REPORT LOCATION STEP n 10 ensures that for a sy
317. tion formula default function should have the following points 0 000 100 1 000 0 20 98 Miscellaneous 44 FIXED FT MULTIP x Excentricity defining the shape of the failure surface Format EXC x Units Acceptable range 0 5 1 07 Default value 0 52 Multiplier for the direction of the plastic flow Format BETA x Units Acceptable range minimal real number maximal real number gt Recommended range 2 2 Default value 0 0 Specific material density Format RHO x Units M P Acceptable range lt 0 maximal real number gt Default value 0 0023 f f Coefficient of thermal expansion Format ALPHA x Units 1 T Acceptable range lt 0 maximal real number gt Default value 0 000012 Fixed smeared crack model will be used Format FIXED x Units none Acceptable range lt 0 gt Default value 0 25 Multiplier for tensile strength in the plastic part of the fracture plastic model in order to ensure that plastic surface and fracture surface intersect each other Units none Acceptable range lt 0 gt Default value 2 1 SHEAR FACTOR x Shear factor that is used for the calculation of cracking shear ATENA Input File Format 99 stiffness It is calculated as a multiple of the corresponding minimal normal crack stiffness that is based on the tensile softening law Units none Acceptable range lt 0 gt Default value 20 UNLOADING x Unlo
318. tor It should be 1 1 15 1 25 1 3 1 55 sfactor for slab cylinder square prism sphere cube respectively Default value 1 25 WATER AIR Curing conditions either under in water or air under normal STEAM CURING temperature conditions WATER AIR or steam condition 5 Default value AIR END OF CURING Time at beginning of drying i e end of curing days TIME sendeuring Default value 7 days Default value 2 8 Default 0 days SHRINKAGE Measured shrinkage material compliance measured val for COMPLIANCE previously specified load and current time Units of water loss measured val must correspond to units of total water loss shrinkage is dimension less and compliance is input in kPa HISTORY TIME For each entry of material history the data time temper and time HUMIDITY humid must be input If the data keywords are used then it humid doesn t matter in which order the 3 data are input Otherwise the TEMPERATURE indicated order is assumed The units are days degrees Celsius temper y and dimension less humidity in interval 0 3 1 amp CCModelACI78 DATA CCModelACI78 CONCRETE concrete type THICKNESS thick FCYL28 28 HUMIDITY humidity DENSITY density AC ac WC wc AS as SLUMP slump AIR CONTENT air WATER AIR STEAM CURING END OF CURING TIME endcuring LOAD CURRENT TIME time SHRINKAGE measured val Table 91
319. tra Isoparametric tetrahedral element E g lt gt E g CCIsoTriangle lt xxx gt E g CCIsoQuad lt xxxx gt 10 4 nodes quadrilateral element composed of two triangle isoparametric elements This element must be defined by at least four corner nodes E g 10 lt gt CCQ10Sbeta 4 nodes quadrilateral element composed of two triangles Four corner nodes must define this element The material model at this element is evaluated at the element center The constitutive secant matrix evaluated at the element center is used throughout the whole element to calculate element internal forces E g CCQ10Sbeta lt xxxx gt CCSpring Spring element defined by a single node This element type should be used to define a spring support at given node CCLineSpring Line spring element defined by two nodes This element type should be used for spring supports along solid element edges CCPlaneSpring Planar spring element defined by three nodes This element type should be used for spring supports along faces of solid elements CCIsoTruss Isoparametric truss element E g CCIsoTruss lt xx gt CCIsoASymTruss Isoparametric truss element for axisymmetric problems The element contributes stiffness in direction of its axis For adding also radial stiffness combine this element with the CCCircumferentialTruss or CCCircumferentialTruss2 element E g CCIsoASymTruss xx CCIsoGap Gap Interface element
320. type THICKNESS thick FCYL28 28 HUMIDITY humidity AC ac WC wc GS gs SC sc SA sa CEMENT MASS cement_mass SHAPE FACTOR sf STEAM WATER AIR CURING END OF CURING TIME endcuring LOAD CURRENT TIME time SHRINKAGE measured_val Table 94 amp CCModelBP1 sub command parameters Parameter Description CONCRETE Type of concrete Only type 1 and 3 are supported CONSTR 274 Default value 1 THICKNESS thick Ratio volume m surface area ny of cross section For long elements it is approximately cross sectional area m perimeter m Default value 0 0767 m FCYL28 fcyl28 Cylindrical material strength in compression kPa Default value 35100 kPa HUMIDITY humidity Ambient relative humidity 0 3 1 Default value 0 780 Default value 7 04 Default value 0 63 Coarse fine aggregate ratio 156 Demutvae 3 Default value 1 8 Default value 0 4 Default value 320 kg m SHAPE FACTOR sf Cross section shape factor It should be 1 1 15 1 25 1 3 1 55 for slab cylinder square prism sphere cube respectively Default value 1 25 STEAM WATER Curing conditions either under in water or air under normal AIR CURING temperature conditions WATER AIR or steam condition 5 Default value AIR Time at beginning of drying i e end of curing days TIME endcuring Default value 7 days TIME nie Default 0 days SHRINKA
321. ual for more detailed description of this material See the description of FATIGUE PARAMS for details on fatigue analysis parameters Table 70 amp 3DNONLINCEMENTITIOUS2FATIGUE sub command parameters Parameter Description Basic properties Ex Elastic modulus Units 17 Acceptable range 0 maximal real number gt Default value 30 x 10 f f Generation formula 6000 15 58 Ra cu this formula is valid only if 15 compressive cube strength given as positive number in MPa MU POISSON NY x Poisson s ratio Units none Acceptable range lt 0 0 5 Default value 0 2 ATENA Input File Format FT RT F T R T x FC RC F C R Tensile properties GF x CRACK SPACING x TENSION STIFF x 107 Tensile strength Units F 1 Acceptable range 0 maximal real number Default value 3 f f 2 Generation formula FT 20 24 R3 f Compressive strength Units F I Acceptable range lt minimal real number 0 Default value 30 f f Generation formula FC 0 85R f f Specific fracture energy Units F l Acceptable range 0 maximal real number Default value 0 0001 f f Generation formula GF 0 000025 FT Crack spacing average distance between cracks after localization If zero crack spacing is assumed to be equal to finite element size Units 1 Acceptable range lt 0 maximal real number gt Default value 0 0
322. uch a coupled pairs or groups Alternatively master slaves pairs can be picked up from list of masters and list of slaves automatically Such a pair is created if master versus slave node coordinates from the respective lists are closer than absolute distance x If the x 1s negative then for each slave it picks the closest few masters and constrains the slave using linear combination of the picked masters In this case the value of absolute distance x has no influence on the selection of masters and is used as the convergence tolerance in form of absolute global coordinate negligible error in the iterative solution to find coefficients for the displacement of the contributing nodes of the nearest pseudo element defining master nodes which surrounds the master node If DISTANCE is not defined the model NEGLIGIBLE SIZE is used instead The PROCESS FLAG input be used to specify a special way of master slave boundary conditions generation These constrains can be generated using either current or reference coordinate system Another option is to copy during the generation displacements from master points to slave points It is useful in modeling of construction process For a complete description of the PROCESS FLAG options see Table 106 skip mask allows for definition of DOFs that are skipped i e not connected If skip mask is not defined all nodal DOFs are linked The SKIP DOFS MASK skip mask is used to code which nodal dofs
323. used to connect reinforcement bars to tye surrounding solids Example MACRO ELEMENT 1001 GENERATE TYPE CCDiscreteReinforcementME THROUGH NODES 100 101 NAME Bottom reinforcement MINIMUM 0 GROUP 2 EMBEDDED AT 1 ELEMPROP Bar 1 NODEPROP NI ID 1 NODEPROP N2 1 2 REPEAT 2 DX 0 DY 0 02 0 02 DZ 0 can be only REPEAT 2 DY 0 02 as it remembers the last value EXECUTE MACRO ELEMENT 1000011 UPDATE REPEAT 9 RESET EMBEDDED RECONNECT NODES 4 10 4 6 CCDiscretePlaneReinforcementME MACRO ELEM DATA SPEC data This macroelement is used to generate discrete smeared reinforcement planes Each reinforcing plane can be of triangular or quadrilateral shape Its corner boundary nodes are defined by 3 or 4 macro nodes Syntax PLANE n THROUGH NODES n n2 n3 n4 nl n2 n3 3 MINIMUM SIZE x EMBEDDED IN SOLID SOLIDS FROM solid group id 1 solid group id 2 NORMAL TINY SIZE ATENA Input File Format 253 Table 161 MACRO_ELEM_DATA_SPEC for CCDiscretePlaneReinforcementME MACRO_ELEM_DATA_SPEC element parameters Parameter Description PLANE n THROUGH NODES n1 n2 n3 n4 nl n2 n3 EMBEDDED IN SOLID SOLIDS AT FROM solid group id 1 TO solid group id 2 TINY SIZE MINIMUM x Example Specify 3 or 4 macronodes ids defining triangular or quadrilateral reinforcement plane Interval of element groups defining the master material i e solids ids where the bar
324. value 02 Miscellaneous CO TCR EXC x Eccentricity defining the shape of the failure surface Units Acceptable range 0 5 1 07 Default value 0 52 BETA x Multiplier for the direction of the plastic flow Units Acceptable range minimal real number maximal real number gt Recommended range 2 2 Default value 0 0 x Material density Units M P Acceptable range lt 0 maximal real number gt Default value 0 023 fy f ALPHA x Coefficient of thermal expansion Acceptable range lt 0 maximal real number gt Default value 0 000012 FIXED x Fixed smeared crack model will be used Units none Acceptable range lt 0 gt Default value 0 25 FT MULTIP x Multiplier for tensile strength in the plastic part of the fracture plastic model in order to ensure that plastic surface and fracture surface intersect each other Units none Acceptable range lt 0 gt Default value 2 1 SHEAR FACTOR x Shear factor that is used for the calculation of cracking shear stiffness It is calculated as a multiple of the corresponding minimal normal crack stiffness that is based on the tensile softening law Units none Acceptable range lt 0 gt Default value 20 90 AGG SIZE x Aggregate size for the calculation of aggregate interlock based on the modified compression field theory by Collins When this parameter is set The shear strength of the cracked concrete is calculated using the MDF theory by Collins The input para
325. y vel z Specify initial nodal velocities in direction of global coordinates 3D problems need 3 values 2D problems only two values ACCEL accel x accel Input initial nodal acceleration in similar way as the above accel z initial velocities input amp GENERATED INITIAL VALUES NODAL SETTING SELECTION se ection name CONST const vector COEFF X coeff x vector COEFF Y coeff y vector COEFF Z coeff z vector GENERATE ACCEL GENERATE VEL Table 138 Nodal Initial Conditions Definition generated entries Sub Command SELECTION Name of selection for which the generation is requested selection name GENERATE ACCEL Keyword for entities to be generated The values in global GENERATE VEL structural directions are generated as linear combination CONST const vector COEFF X coeff x vector COEFF Y coeff y vector value const 1 x coeff 1 y coeff 1 z coeff 1 COEFF Z coeff z vecor value const 2 x coeff 2 y coeff 2 z coeff 2 value const 3 x coeff 3 y coeff 3 z coeff 3 x y z are coordinates of nodes where the generation is processed The vecor of values e g const vector must include 3 or 2 values for 2D or 3D problems respectively Example ATENA Input File Format 207 NODAL VEL ACCEL SETTING NODE 1 VEL 0 0030 0 0 ACCEL 0 005370861556 0 0 NODAL VEL ACCEL SELECTION my_selection CONST 0 0030 0 0 COEFF X 0 0 0 COEFF Y 0 652364864
326. y a finite element that is used LAYEREDSHELL LAYERED SHELL 2D SHELL SHAPE TRIANGLE ATENA Input File Format 69 id n Ynumber nodes 1 id n idm n uaa On Table 57 amp ELEMENT INCIDENCES sub command parameters Parameter Description NNODES num nodes Optional number of element incidences If not defined num nodes is derived from the element s element type Element id E g n A Ynumber nodes Element incidences i e ids of nodes incidenting with the element number_nodes integer numbers is expected where number number_nodes is number of element nodes for the particular element type E g n n 1 I n number Note This command has to follow the command ELEMENT GROUP Each element incidences data must be input on a separate line amp ELEMENT MATERIALS id n points id n J mimber oF maternal points idm n Yhumber of material points Table 58 amp ELEMENT MATERIALS sub command parameters Parameter Description Element id E g n Material type at element s material point By default a positive integer value is expected for each material point of the element n lane ap material points If the input value n is zero it indicates that this and all remaining material points use the default material type If the input value n is negative it indicates that this and all remaining material points are of type n If
327. y columns The inverse of the diagonal matrix D is stored No fill in is allowed Incomplete Cholesky Decomposition Preconditioner SLAP Set Up Routine to generate the Incomplete Cholesky decomposition L D L trans of a symmetric positive definite matrix A which is stored in SLAP Column format The unit lower triangular matrix L is stored by rows and the inverse of the diagonal matrix D is stored Diagonal Scaling Preconditioner SLAP Normal Eqns Set Up Routine to compute the inverse of the diagonal of the matrix A A Where A is stored in SLAP Column format amp CONVERGENCE CRITERIA ABSOLUTE ERROR RELATIVE ERROR RESIDUAL ERROR x DISPLACEMENT ERROR x ENERGY ERROR x STEP STOP RESIDUAL ERROR FACTOR x STEP STOP DISPLACEMENT ERROR FACTOR x STEP STOP ENERGY ERROR FACTOR x ITER STOP RESIDUAL ERROR FACTOR x ITER STOP DISPLACEMENT ERROR FACTOR x ITER STOP ENERGY ERROR FACTOR x NEGLIGIBLE RESIDUAL x NEGLIGIBLE DISPLACEMENT SIZE x ITERATION LIMIT n Table 13 amp CONVERGENCE CRITERIA sub command parameters Parameter Description ABSOLUTE ERROR The convergence criteria values are computed using the absolute norm that is using the maximal element of an array in its absolute value The error is then computed by dividing an iterative value with the value cumulated within the whole step Note that this keyword can be used also in conjugation with the input NEGLIGIBLE
328. y the command amp OUTPUT for the location type MACRO ELEMENTS Output keyword MACRO ELEMENT Input data characterizing macro elements See also data MACRO ELEMENT INCIDENCES and MACRO ELEMENT PROPERTIES ATENA Input File Format 203 DISCRETE REINFORCEMEN Data for discrete reinforcement generation T Supersedes data attribute DISCRETE REINFORCEMENT within location type OUTPUT DATA MACRO ELEMENT INCIDE List of principal macro nodes that define each macro NCES element MACRO ELEMENT PROPER Properties of macroelements and their principal nodes TIES MACRO ELEMENT GENER List of finite elements that were created during ATED ELEMENTS generation of each macro element MACRO ELEMENT GENER List of FE nodes that were created during generation of ATED NODES each macro element Table 135 Output type keywords understood by the command amp OUTPUT for the location type MACRO NODES MACRO NODAL COORDIN Coordinates of macro nodes ATES Examples OUTPUT LOCATION OUTPUT DATA DATA LIST CURRENT SORTED LHS BC END OUTPUT NAME displ MONITOR 1 EACH ITERATION LOCATION NODES NODE AT 132 DATA LIST DISPLACEMENTS ITEM AT 3 END OUTPUT NAME s coord PLOT 2 LOCATION NODES NODE AT SELECTION border nodes DATA LIST REFERENCE BORDER COORDINATE END ITEM FROM 1 TO1 4 7 Creep Analysis Related Commands The following section describes commands used for creep analysis See also amp CREEP MATERIAL amp CREEP

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