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GiD Tutorial - Cervenka Consulting

1. ssscse ss0oss00000000000000000000000000000000000000000000000000000000000000 135 Bx CONCLUSION cesiones dead tosasaldlnoGon nasa Sas bi adesa od la as vas dasa ta ase deara kes6sasdasadasoztsa s OO 7 PROGRAM DISTRIBUTORS AND DEVELOPERS O0 0000OGOCOOCOCOCOCOOOGOOOOOCOCOOCOOOCOOOOOOOOOOOOOOCOCOGOOOOOOOCOOCOOCCO 140 Be LITERATURE s osa set a o3bikola l ue sti sa ob aol vesidesanconconceesecaceseebanccnecucaccecancwaseeabcnaeseanconcweance RI ATENA Science GiD Tutorial i 1 INTRODUCTION This tutorial provides a basic introduction to the usage of the program ATENA and GiD and it is specifically targeted for ATENA GiD beginners ATENA GiD is a finite element based software system specifically developed for the nonlinear analysis of reinforced concrete structures ATENA 1s used for the analysis itself and the program GiD is used for the data preparation and the mesh generation This tutorial contains a step by step explanation how to perform a non linear analysis on an example problem of a reinforced beam without smeared reinforcement The geometrical and material properties correspond to the experimental setup by Leonhard in 1962 More details about the problem or experiment can be also obtained from the original report 6 or from the program developer or distributor It is possible to create and analyse the example problem described in this tutorial in demo version of ATENA GiD Because of that a rather coarse finite e
2. I Surfaces Eag Volumes NA i f h F 4 ae is i an A r i i F y i l Fi Hs ii i fy AWE A a Pi a a a 7 U i V m i i NA Help ORs beam i n y n M mi n i rds ni au a PX ih Prt a A k Mat uu i T i it Sa ee D n n My xt a a 1 i ii n s i i VV Project 3D Beam Atena Static Calculate ATE H 5 Semistructured Cartesian Mesh C P Mesh A R E P m te a 7 PROKOPA HTA A p ALGEBRAS SET EN Data ilities Data Utilities eo z metry S coe BS automatically to some entities Geo nged Files Mesh generated To see it use command meshview BD GiD Atena Static 2D and 3D Interface View Geometry Uti Files View ize chal Number of linear elements is 38 It means that the reinforcement bars were also divided This is not necessary and it is better to reduce number of elements The procedure is same as for dividing the beam Use the command Mesh Structured Lines Assign number Figure 131 The generated structured mesh of cells in the main menu e structured mesh command 100 Once this command 1s executed the program asks for the number of cells which should be assigned to the lines Write number one The reinforcement bars have to be selected see TT p p oS UJ ery p p NO Parameter input Enter number of cells to assign to lines Gi GiD Atena Sta
3. After selecting this button the several options will appear In this case the Plates material will be assigned to the loading and supporting steel plates which are represented by volume entities Therefore the option Volumes should be selected Then the volumes of the plates can be selected in the graphical area and the button Finish has to be pressed to complete the assignment Go GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Se x Files View Geometry Utilities Data Mesh Calculate ATENA Help oo BSH BT 92 nas 1 82 9 Double click here to integrate the window sek BO BT Mare C KVO FU Tr E The volumes of the steel plates have to be selected SOUD Elastic Basic Miscellaneous Element Geometry Geometrical Non Linearity LINEAR v Idealisation 30 The button Finish has to be selected to complete assigning of the material Mon Quadratic Element Press Finish to end selection Exchange Added 1 new volumes to the selection Enter more volumes ESC to le Added new volumes to the selection Enter more volumes ESC to le Command Figure 70 The assigning of the Plates material to the volumes The steel plate material was created and assigned In the last section the reinforcement material will be created ATENA Science GiD Tutorial 53 3 3 3 Reinforcement Bars Before definition of the reinforcement material it is good to display only the Bar layer The material d
4. Atena Studio File Edit View Project Output Window Help Postprocessor MEROLPEX BOD 80 HEUEHEUBL Convergence diagram Convergence diagram so A B Criter 1 MM Criter 3 B Criter 2 E Criter 4 View style 00016537 Solid with surface mesh v 00014213 Q on 00011889 lig 000095652 000072413 000049175 Draw deformed model 000025936 Scale 26972 005 Absolute Relative 000020541 Relative deformations 10 Show undeformed model Convergence criteria x z 20 deformation scale Step Iteration 25 56 hd State Iterations Name Value Units Analysed ConvergenceMonitor Criter 1 0 00303147873222818 Analysed ConvergenceMonitor Criter 2 0 532201786032326 H Analysed ConvergenceMonitor Criter 3 0 612749437764695 paa ConvergenceMonitor Criter 4 0 00161335839561085 Loadl142 REACTIONS 000010 DOF 3 0 0351642299305761 MN parse Deflection1392 DISPLACEMENTS 000010 X 3 0 00362271475176417 m of load in interval LC coeffs 344 HM Analysing SS Output Message Error Monitoring points Figure 162 Deformed structure Besides colour scale indicating distribution of crack width on the structure the actual cracks can also be displayed directly on the surface It is done by opening Cracks box in View settings toolbox see Figure 163 and then by the setting the minimal crack width to show and multiplier of crack width see Figure 164 ShearBeam3
5. Window E contains graphical representation of the analysed structure Window F contains default convergence diagram or other user defined diagram ATENA Science GiD Tutorial 115 When the analysis is running it is possible to stop or suspend the calculation However it is not recommended to do it in this first tutorial example For that it is possible to use Project Pause analysis Interrupt analysis After step After iteration As soon as possible command in the main menu or buttons of the Analysis control toolbar Pause analysis Interrupt analysis al Interrupt analysis Interrupt After step After iteration a As soon as possible a Ccana For detailed description of the ATENA user interface it is recommended to read ATENA Manual 7 4 3 Load Displacement Diagram During the running analysis it is very useful to see the evolution of the applied load and beam deflections The progress of the load and deflection is available in the monitors that were defined in the previous Section 3 4 4 Now it will be described how to visualize these monitors during the nonlinear analysis The first step in the visualization of monitors is to open a new diagram window by the clicking on the icon The empty window for the diagram and the diagram settings will appear see Figure 150 The new diagram is defined by diagram settings dialog see Figure 151 116 a ShearBeam3D Atena Studio File Edit View Project
6. zvedat tata sass Lies draci ecotee aca ucowuaa tas buds loeb ales ocd akad dd r ots 92 BOD StRUCLUTecMeSh aa a a hudbou bt hos en ta Sure ee eba 93 4 FE NON LINEAR ANALYSIS cccocccccccccccccccccccccccccccccccccscccscccccccocccccccccecoccccsccccsccccccoccccses 1 OG 4 1 Missing CONLACES icacccvseceiierscccsicsccussecascsevass cvscsecetecvantesssdseaavaussdecsctsadasvarecsuede cdeesteeseudsoaconatnesesucese 106 All Master TOD Beam GOMCIELO Miceissccceathielcesdicieusdhsacacheavesdtetetdesesatevauedssacaecsaucsaestnachesudussatediandacsbawsvansassssueseacieneevas 107 412 Slave TOD Plate GOMGIUIOM zoki edn diode uto a 110 4 1 3 Master Bottom Beam and Slave Bottom Plate ConditiOnS ssessessessessessessessesseesessessesseoseeseoseesesseesesss 112 4 2 ATENA Studio Interface Description sssosososoos000 00000000000000000000000000000000000000000000 115 4 3 Load Displacement DIAGraMM wisiisssscissseccdessscusissvclecisevecisesecssdccebasesedsesdeeveassetsesscadesusscecescbonatesvecs 116 4 4 Crack Width DIS DI AY kk sccescaterecasecdasvcgdcasece es susecadednsenieeseesestadeseseusneastaesacseacesessteasaceseacaaseceNsesss 122 5 POST PROCESSING O 00000OCOCOCOCOCOCOOCOCOCOOOOOOOOOOOOOOOOCOOOOOOOOOOOOOOOCOOCOOOOCOOOOOOOOOOCOOOOOOOOOOOOOOOOCOOCOOOOOOOOOOOOOOCOCOCOOCO 1 28 5 1 GID Post processino sss state ki sid ada es deo al A E a sA ddd do d s PAL o Ved das sad VA had k bd 128 5 2 ATENA Studio Post processing
7. 2 Criter 4 View style l Solid with surface mesh v Time 3 00000 Light on 0 8 ATENA V 4307516 License 4001 w Deformations 0 6 v Cracks v Results Convergence criteria 04 0 2 A Analysis steps B X Monitoring points Number State Iterations Name Value 2 Analysed i ConvergenceMonitor Criter 1 0 000463823491306814 Analysed ConvergenceMonitor Criter 2 0 0305627576594232 Analysed ConvergenceMonitor Criter 3 Analysed ConvergenceMonitor Criter 4 Analysed Load1142 REACTIONS 000010 DOF 3 0 019791328869216 P Deflection1392_DISPLACEMENTS 000010 X 3 0 000592292251780874 of load in interval LC coeffs Analysing Output Message Error Monitoring points 2 4 Step Iteration Figure 155 The Default layout 4 4 Crack Width Display During the running analysis it can be also useful to display crack width in the Structure window When this window is active all icons of the Graphics Toolbar are active too There is Structure settings toolbox on the right side of ATENA Studio window This toolbox can be used to activate the display of various result quantities Before selecting result data the displayed activity should be selected Use the icon Visible domain toolbox and select 3D activity seeFigure 156 After that the result data can be set in settings toolbox Click on the icon and choose crack width from the list see Fi
8. ATENA Input File Format CERVENKA CONSULTING 2009 G1D Reference Manual version 9 0 4 International Center For Numerical Methods In Engineering CIMNE 2009 Leonhardt and Walther Schubversuche an einfeldringen Stahlbetonbalken mit und Ohne Schubbewehrung Deutscher Ausschuss fuer Stahlbeton Heft 51 Berlin 1962 Ernst amp Sohn ATENA Program Documentation Part 12 ATENA Studio Description CERVENKA CONSULTING 2012 ATENA Science GiD Tutorial 141
9. Atena Studio File Edit View Project Output Window Help MERBOLPEX IBO eo ENARA Convergence diagram Postprocessor 4 Convergence diagram MM Criter 1 MM Criter 3 ME Criter 2H Criter 4 Crack Width 7 Codl Rotation icon 0001564 00013449 00011257 00009065 000068732 000046314 000024596 29781e 005 0 0001894 X Y z Solid with surface mesh v v Deformations m w u U u wv nn w gt i o U 20 Time 44 0000 Step Iteration ATENA g Iterations Value Units ConvergenceMonitor Criter 1 ConvergenceMonitor Criter 2 ConvergenceMonitor Criter 3 ConvergenceMonitor Criter 4 0 000533849688972423 0 0239325686759975 0 0174423502547856 1 27763943439924E 05 Loadl142 REACTIONS 000010 DOF 3 0 0351642299305761 MN Deflection1392_DISPLACEMENTS 000010 X 3 0 00362271475176417 m of load in interval LC coeffs 344 JAH Output Mesage Eror Monitoring points 124 Also for better view the model can be displayed deformed It 1s done by the clicking on the Deformations in setting toolbox on the right side of the Window and then by the checking the option Draw deformed model see Figure 160 There can also be set scale of deformations relative or absolute but it isn t necessary see Figure 161 and Figure 162 Si ShearBeam3D Atena Studio A jn Som File Edit View Project Output Window Help Postprocessor Mek R
10. ERVENKA CONSULTING C ervenka 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 4 6 ATENA Science GiD Tutorial Step by step guide for nonlinear analysis with ATENA and GiD Written by Zdenka Prochazkova Jan Cervenka Zdenek Janda Dobromil Pryl Jitka Mikolaskova Prague June 2 2015 Trademarks ATENA is registered trademark of Vladimir Cervenka GiD is registered trademark of CIMNE of Barcelona Spain Microsoft and Microsoft Windows are registered trademarks of Microsoft Corporation Other names may be trademarks of their respective owners Copyright 2000 2015 Cervenka Consulting s r o CONTENTS 1 o INTRODUCTION O0 0000OGOCOOCOCOCOCOOOOCOOCOCOOGOOOOOOOOOGOOGOOGOOOOOOOOOGOOOOOOOCOOCOGOOOOOCOOCOCOGOOOOOOOCOOCOGCOCOOOOOCOOCOOOOOCOOCOCOCOOCCCO 1 2 STARTING PROGRAM O0 0000OCOCOOCOCOCOCOOGOOOCOOCOOCOCOCOCOOOOOCOCOOOOOOCOOCOGCOOOOOOCOOGCOGOOOOOOOCOOGCOOOOOOOOCOOGOOCOOOOOOCOOCOOOOOCOCO 3 3 PRE PROCESSING O00000O0OOCOCOCOCOCOCOCOOCOOOOOOOOOOCOOOOOOOOOOOOOOOOOOOCOOOOOOOOOOOOOOCOOCOOOCOOOCOOOOOOOOOOCOOCOOOOOOCOOOOOOOOOOOOOOOOOCOOCOCO 5 3 1 IEF OCUICTIONN a cicshdcvvacaciseinsdissecedevsesssdswensensuuateanescesecsssseusneds E E 5 3 1 1 Introduction of the Graphical User Interface cesessssscsesssssssssseescsessssesesesescsesesesessesesesesesesesssseseseseacaesees 5 3 2 Geomet
11. a a a a a a a a a a a a a a aka a a aka a a akakaka aka a akakakakaka akakaka aka aka aka aka akakakakakakakaka akakakakakaka kakaa kakaa kakaa aaa Atena execution has been restored from the file C USERS CCC DESKTOP JIMN 3D BE AM GID ATENACALCULATION 3D Beam 8809 ka a a a a a a a e a a a e a a a e a e a a a a e aka a e a a a e a a a eka eka aka eka a a aka ake a e akakake a eka ak ak aka ak kakakaka kakaa kakaa Figure 168 The importing of the results from ATENA into GiD ATENA Science GiD Tutorial SBwe ed 68 22 f n HD gt res a re ZB ap n 372 e 283 r Normal t No Units m GiD B 129 Go GiD Atena Static 2D and 3D Interface Project AtenaResults Files View Utilities Docuts Viewresults Options Window Help Sowa ed eo 22 K lt DnB T iy Z el n 434 e 313 r Normal t No Units m GID B KE 200 Results read new format x 0 72676 View file C Users ccc Desktop JIM 3D Beam gid 3D Beam post vv successfully read E y 0 49812 Command BA z 0 Figure 169 The importing of the results from ATENA were finished After importing data from ATENA the post processing can be started Let s display cracks like in previous chapter 4 4 of FE non linear analysis in ATENA Studio First of all it should be checked which step will be post proc
12. extrusion Press Finish to end se x 0 65919 y 0 085385 Enter Surfaces to Copy Added 1 new surfaces to the selection Enter more surfaces ESC to leave Command B z 0 Figure 13 The selection of the surface for the extrusion ATENA Science GiD Tutorial 15 To see the extruded volume it is possible to use Rotate Trackball icon or holding left mouse button SHIFT key see Figure 14 Go GiID Atena Static 2D and 3D Interface Project UNNAMED Atena Static a im Files View Geometry Utilities Data Mesh Calculate ATENA Help OB 3 66 24 1 B51 amp bs S 3 9 Entities type Surfaces Transformation Translation First point Mum x 00 y 0 0 DL second point Mum x 00 y 0 0 022 Duplicate entities Do extrude Volumes C Create contacts The light blue prism Maintain layers defines a volume Multiple copies 1 Pick LEFTMOUSE to desplace view ESC to quit If present mouse wheel zooms Pick LEFTMOUSE to desplace view ESC to quit Command Figure 14 The extruded volume the light blue prism defines a volume 3 2 2 Loading and Supporting Steel Plates After the creation of the beam geometry loading and supporting plates should be created The top plate loading plate will be created first The bottom plate supporting plate will be created by copying of the top plate The top plate will be created with using the commands Copy
13. n GID Atena Static 2D and 3D Interface Project 3D Beam Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help OB 8IBSGBP 1 B51 B bam 8 22 4 Conditions Fixed Contact for Surface Type of Cond Master v ContactName Top You can have multiple Master Slave connections identified by different names Only Master and Slave conditions of the same name are connected eee This button should be selected to draw C Do not connect selected DoFs ios contact condition see Figure 144 Entities Draw Unassign Fixed Contact for Surface All conditions Field s value Field s color Pick LEFTMOUSE to rotate ESC to quit if present mouse wheel zooms ssigned 1 new Surfaces to condition Fixed Contact for Surface y 0 42613 Command Sl z 0 Figure 143 The draw coloured contact condition command ATENA Science GiD Tutorial 109 Gi GiD Atena Static 2D and 3D Interface Project 3D Beam Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help COS amb 85 op beam Z Conditions Fixed Contact for Surface Type of Cond Master ContactName Top You can have multiple Master Slave connections identified by different names Only T Master and Slave conditions of the same name are connected together Do not connect selected DoFs Use current coordinates Press Finish to end selection Draw Unassign
14. ATENA GiD 3 1 1 1 Problem Type The GiD is a general purpose pre and post processing tool for variety of numerical problems and analysis software The GiD can be customized to create input data for basically any finite element software The customization 1s done through the definition of various problem types Each problem type represents certain customization Therefore it 1s important to select an appropriate problem type at the beginning of the work In this case ATENA problem type has to be selected The problem type definition must be done before starting input of data Executing this command later may cause losing of all material and load definition The problem type is selected from the Main menu Data Problem Type ATENA Static Once this is selected ATENA specific icons will appear in the main window see Figure 3 Gig GiD Atena Static 2D and 3D Interface Project UNNAMED AtenaiStatic sa Files View Utilities Mesh Calculate ATENA Help E S TO v op od ed gm 28 Jroblem type Atena o Conditions Transform Materials Internet Retrieve ck Dynamic Interval Data Load Problem Data Unload Data units Debugger ransport Interval Local axes Starts definition of concrete material Starts definition of reinforcement material Draw all materials Define boundary condition Load amp Supports Draw boundary condition Load amp Supports Start ATENA static analysis using
15. Command Figure 38 The definition of the Send to command for the beam layer GD GiD Atena Static 2D and 3D Interface Project UNNAMED AtenaiStatic mm Files View Geometry Utilities Data Mesh Calculate ATENA Help OB BIS BAl1D amp bem S13 4 ee Jen B jii d e B c p Selected volume of the beam this volume will be assigned to the beam layer after the pressing of the Finish button Finish Press Finish to end selectior Figure 39 The selection of the volume which should be sent to the beam layer ATENA Science GiD Tutorial 33 The content of the chosen layer can be seen or hidden The yellow bulb next to the name of the beam indicates the display status of the layer Also direct clicking on the bulb for an individual layer can switch between the display modes The LayerO the layer which was already there before creating the beam layer should be selected and then the yellow bulb The yellow bulb will change to the grey colour It means that all its content should not be displayed The Layer still contains the geometry of steel plates and reinforcement Therefore these geometries should disappear in the graphical area after deactivation of the LayerO see Figure 40 It should be possible to see only the beam and it assures that the beam geometry was successfully sent to the beam layer GD GiD tena Static 2D and 3D Interface Project UNNAMED Atena Static o E Files Wiew Geometry Uti
16. Figure 97 The divided line Now the necessary point for the displacement condition is already created Boundary conditions automatically belong to the same layer as the geometry onto which they are assigned Therefore it 1s not necessary to control which layer 1s activated The condition command can be executed by the icon FA or by Data Conditions in the main menu The displacement condition definition is depicted in the Figure 98 74 Conditions Displacement for Point hi K USE decimal point DO NOT use comp Coordinate System GLOBAL The displacement condition is applied on the point therefore this icon should be selected By clicking on the arrow the choice of available conditions will be displayed The X Displacement 0 0 m option Displacement for Point has to be Displacement 0 0 m selected Z Displacement 0 0001 lt _ The displacement is in vertical direction Therefore Z Displacement 0 0001 m should be defined By this button the displacement can be assigned to the geometry see Figure 99 Assign Entities Draw Unassign Figure 98 The displacement condition definition Parameter input Displacement for Point Z Displacement 0 0001 m im By clicking on the icon F the created condition can be displayed and can be used to verify if it 1s correctly applied at the right locations After clicking on that icon the displacement condition should be displayed at the point in the middle
17. GiD Atena Static 2D and 3D Interface Project 3D Beam Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help eo BE DO bem 8 Conditions wht tle v a hi amp e B 5 ia aA Fixed Contact for Surface Type of Cond Slawe ContactName Top You can have multiple Master Slave connections identified by different names Only i Master and Slave c same name are go together Unassign 1 The selection of the surface for the contact condition Pick LEFTMOUSE to rotate ESC to quit if present mouse wheel zooms Wdded1 new surfaces to the selection Enter more surfaces ESC to leave Command Figure 146 The selection of the surface for the slave top plate contact condition 4 1 3 Master Bottom Beam and Slave Bottom Plate Conditions The bottom conditions will be done by the same procedure like in the case of top contact conditions Only the name has to be different It is recommended to use contact name Bottom The Figure 147 shows the right definition of bottom contact conditions 112 Gi GiD Atena Static 2D and 3D Interface Project 3D Beam Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help f gt a oop Nok OO f re lt gt Ors beam myl al ae Fixed Contact for Surface Type of Cond Slave ContactName Bottom You can have multiple Master Slave connections identified by different names Only f Master and Slave
18. In this tutorial example the Profile should be 26 mm and number of profiles will stay 1 Then the Update changes icon Z has to be clicked to recalculate the reinforcement area Then it is necessary to click on the Update changes icon again to save all changes into the material see Figure 75 56 1D Reinforcement i A lex Ma EC2 Basic Reinf Function Miscellaneous Element Geometry Bars Material Prototype oag s Modulus E 200 selected to be possible to define profile W Calculator Profile 26 Number of Profiles 1 ROL To recalculate click 2x Update changes next to material box Tres 00005300201 m It is important to read all help notes mir 2 The profile diameter should be changed to 26 mm Figure 75 The default Basic parameters of the reinforcement the icon Update changes has to be clicked 2x to change parameters The rest of the reinforcement parameters will be default There is no change necessary see Figure 76 Figure 77 and Figure 78 1D Reinforcement Bars EC2 Basic Reinf Function Miscellaneous Element Geometry Reinf 01 Yield Strength YS 616 MPa s Reinf 01 Number of Multilinear 3 values Reinf 01 eps 0 025 Reinf 01 f2 646 8 Reinf 01 eps3 0 Reinf 01 f3 0 Reinf 01 eps4 0 Reinf 01 f4 0 Reinf 01 eps5 0 Reinf 01 f5 0 Assign Figure 76 The default Reinf Function parameters of the reinforcement ATENA Scien
19. No changes Command Figure 11 The pink rectangle in the middle of blue lines defines the added surface ATENA Science GiD Tutorial 13 The next step is to extrude the created surface into a volume to obtain the required beam The extrusion is done by the command Copy which appears after selecting the command Utilities Copy in the main menu see Figure 12 In this example the surface is extruded in the direction of the Z axis over the beam thickness 0 32 m The thickness will be given by a vector that 1s defined by coordinates of two points in the Copy menu The definition of the extrusion is depicted in the Figure 12 After the definition of all copy parameters the Select button should be pressed Then the surface for the extrusion can be selected in the graphical area The command is completed by pressing Finish button Entities type Surfaces Transformation Translation First point Nur x 0 0 y 0 0 ea z 00 second point Num x 0 0 y 0 0 Do extrude Volumes Create contacts if Maintain layers Select Cancel Figure 12 The description of Copy menu Selection of entities which should be extruded in this case Surfaces should be selected Selection of copy method in this case Translation should be selected Manual inserting of vector coordinates for a direction along which the entities should be extruded in this case the rectangular surface should be extruded in Z axis di
20. Num x 0 0 y 0 0 Duplicate entities Do extrude Volumes v Create contacts Maintain layers Multiple copies 1 Press Finish to end se Surfaces to Copy dded 1 new surfaces to the selection Enter more surfaces ESC to leave Command Figure 28 The selection of the surface which should be extruded to obtain steel plate geometry Gd GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static EEE Files View Geometry Utilities Data Mesh Calculate ATENA Help OB BISSSE BAO 5 S19 a sa The steel plate Entities type Surfaces volume defined by Transformation Translation v light blue prism First point E Num x 0 0 y 0 0 DC Second point Num x 00 y 0 0 E 0 03 C Duplicate entities Do extrude Volumes v Create contacts Maintain layers Multiple copies 1 u _ lected 1 Surfaces A y 0 93421 eometry Has 1 new volumes 5 new surfaces 8 new lines 4 new points Leaving E 9 2 Command n Figure 29 The volume of the top steel plate 26 3 2 2 2 Bottom Plate The bottom steel plate will be created by copying of the top plate The copy starts by command Utilities Copy in the Main menu The definition of the extrusion is depicted in the Figure 30 After the definition of all parameters the Select button should be pressed Then the volume required for the translation can be selected in the graphical area see Figure 31 It
21. Static Files View Geometry Utilities Data Mesh Calculate ATENA Help amp 2 3162682718518 ay S14 4 This edge will be copied by 0 115 m along the x axis in the negative direction if present mouse wheel zooms dynamically Enter 1st point x 1 4533 Enter 2nd point y 0 12008 Command Ba z 0 Figure 16 The geometry after Zoom in The Copy menu appears after selecting Utilities Copy in the Main menu The new line should be in the 0 115 m distance from the right edge of the beam The copied entity 1s line and there is no extrusion necessary The parameter definition 1s depicted in the Figure 17 After the definition of all parameters the Select button should be pressed Then the line required for the copying can be selected in the graphical area see Figure 18 After the selection of the line it is necessary to press Finish button to complete the translation see Figure 19 ene Parameter input Transformation Translation F n t j t e S ty p e n e S OOO Transformation Translation y 0 0 First point x 0 0 a y 0 0 m m z 0 0 on Second point x 0 115 C Duplicate entities y 0 O Do extrude No Z 0 0 Create contacts E Do extrude No Multiple copies 1 Figure 17 The definition of translation of the line Gol GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static o 2s Files View Geometry Utilities Data Mesh Calculate ATENA Help ce y O88
22. System Figure 102 The symmetry condition definition G LO B AL Entities Draw Unassign X Constraint 78 E By clicking on the icon Fa the created condition can be shown in the graphical area After clicking on that icon the symmetry condition will be displayed on the middle surface of the beam see Figure 104 E GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help CBel see OSST plates 4 i Layers Double click here to integrate the window oFoK BA BT Constraint for Surface E LL ae tw UE m Basic i beam T ad p an plates v o of r Conditions Coordinate System GLOBAL A Constraint Constraint Constraint 1 The selection of the surface for the symmetry condition Ine Enter Surfaces with new values 12465 Added 1 new surfaces to the selection Enter more surfaces ESC to leave E y 0 31951 Command E 7 0 Figure 103 The selection of the surface for the symmetry condition ATENA Science GiD Tutorial 79 Gi GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help 05 63 Soh BF B ptes 1932 9 Conditi dara Double click here to integrate the window oFoK easy Constraint for Surface hd Name W Bia Ae Fi a m bas eg Basic pe beam e 6 plates w 7 d Coordinate System GLOBAL Constraint C Co
23. ae Jm Master Top 19 M00000 Now on conditions will be drawn by color 5 press escape to leave Command Figure 144 The Master Top beam condition 4 1 2 Slave Top Plate Condition Conditions command can be executed by the selection of the icon FA or by the selecting the command Data Conditions in the main menu The contact condition definition for master top beam 1s depicted in the Figure 145 110 Conditions The contact condition is applied on the surface therefore this icon should be selected Fixed Contact for Surface lt Type of Cond Slave i By the clicking on the arrow the several options of conditions will offer The option Fixed Contact for Surface has to be selected ContactName Top You can have multiple Master Slave connections identified by different names Only Master and Slave conditions of the same name are connected together C Do not connect selected DoFs CI The Contact Name has to be same like the name of the master condition of the beam Use current coordinates Otherwise the beam and plate would not be connected The Top contact name should be written Dray a i By this button this condition can be Close assigned to the geometry see Figure 146 Figure 145 The slave top plate contact condition Parameter input Fixed Contact for Surface Type of Cond SLAVE Contact Name Top ATENA Science GiD Tutorial 111 Gi
24. and Create lines These commands should be known from the previous chapter The dimensions and location of the plates can be seen on Figure 15 i 0 165 0 100 0 115 X ca C c X pi 0 050 j 0 250 19 100 He 0 925 p 4 1 275 1 Figure 15 The dimensions of the half beam and location of steel plates 3 2 2 1 Top Plate It is useful and easier to use existing elements for the creation of a new object The top plate is located on the right corner of the created beam Therefore the upper right edge of the beam can be copied and moved to 0 115 m from the right end Then this line will be copied and moved again The second copy operation should move the line by a distance identical to the width of the steel plates These two lines will be then connected into a rectangle The surface will be added to this rectangle and then this surface will be extruded into a volume of the steel plate Before starting copying it is better to zoom in the right beam corner see Figure 16 The Zoom in is activated by command View Zoom In or by clicking on the icon The command Zoom in and out can be also activated by holding SHIFT key and using mouse scroll In that case it is also necessary to move the view of the geometry It can be done by holding SHIFT right mouse button ATENA Science GiD Tutorial 17 Gi GiD Atena Static 2D and 3D Interface Project UNNAMED Atena
25. be sent to the bars layer 36 3 2 4 3 Plate Layer It is useful to deactivate of the display of the bars layer by click the appropriate yellow bulb see Figure 44 The reinforcement lines should disappear i Gp GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static s Files View Utilities Data Mesh Calculate ATENA Help A os ed io 22 gt p ns lt a m Layer Double click here to integrate the window oloX BA BY Name VC VO FU TB bars S M gt beam m ta B E wf qa T B Figure4 M The reinforcement disappear after deactivating of the reinforcement layer The last step is to create a plate layer Like in previous two layers it is done by pressing the icon L and name the new layer for example plates Then the plate layer will appear in the list of layers The newly created plate layer is automatically activated The activation is indicated by the checkbox symbol The moving of the steel plate geometry into the plate layer can be started by pressing of the icon amp Then the pull down menu will open see Figure 45 The reinforcement geometry contains two types of entities and all of them should be moved into the bars layer Therefore the option Also lower entities has to be activated and the command Volumes should be chosen After selecting the Volumes in the pull down menu the geometry which should be assigned to the bar layer can be selected see Figure 46 Finish button wi
26. displayed in the middle of the beam see Figure 110 84 Gi GiD Atena Static 2D and 3D Interface Project 3D Beam Atena Static S 42 9 Dou ble click here to integrate the window oFaKX BA BT Name C VO WU Ir B p bars cf B gt beam w T d plates a of F Conditions ee PE FRO O DUN TE Monitor for Point It is also possibile to set the global monitors in Problem data dialog Output Data DISPLACEMENTS Dhr X Dir Dir Draw Each Iteration MonitorName Monitor Press Finish to end selection Unassign 1 The selection of the point for the monitor condition 2 The button Finish has to be selected to complete monitor condition Enter Points with new values Added 1 new points to the selection Enter more points ESC to leave Command Figure 109 The selection of the second monitoring point ATENA Science GiD Tutorial 85 Gi GiID Atena Static 2D and 3D Interface Project 3D Beam Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help OB 8 SGe BAl 9 bem S amp B Double click here to integrate the window eK BA BT Name K VO WU Tr B c bars ag gt beam w 2 d plates oc D Conditions Monitor for Point ZD i a It is also possibile to set the global monitors in Problem data dialog Output Data DISPLACEMENTS We hat EJ E Dir X C Dir Dir Z E Draw Each Iteration M
27. eau beam Utilities Ji Contextual Label Layer of Switch full screen Image to clipboard The new mesh Geomet OBO RG8 BAI DH tor i 4 A729 TARDY ESS S nonnnnnun anf nnnun cone eee sees see Gee eee snununutu eee anununnn 4 O n CECILE AN GiD Atena Static 2D and 3D Interface Files View Geometry Files View selecting Render in the Mouse menu which appears after clicking on the right mouse For better view of the structured mesh the created model can be rendered It is done by button see Figure 136 Gb GiD Atena Static 2D and 3D Interface Figure 135 The flat rendered geometrical model When the mesh is correctly generated the geometrical model definition is finished and calculation can be started See following chapter 4 Figure 136 102 ATENA Science GiD Tutorial 103 4 FE NON LINEAR ANALYSIS This chapter describes the process of running a non linear analysis of the Leonhardt beam using the data that have been prepared in the previous sections of the tutorial The finite element analysis is started by the clicking on the icon or by the using of command Calculate Calculate After selecting this command the program will start to generate the input files for each step of the non linear analysis This process is indicated by the dialog box see Figure 137 And then the ATENA Studio window will appear and analysis will be in progress see Figure 138 Dialog box Init
28. or by performing an initial analysis with a very small load level Then from the resulting stresses it 1s possible to estimate how much the load must be increased to fail the structure ATENA Science GiD Tutorial 87 In this example it is known from the experimental results that the beam should fail at the deflection of about 0 003 m In previous section the prescribed displacement of 0 0001 m was applied at the top plate This means that the predefined displacement should be multiplied approximately 30 times to reach the failure Base on this assumption the Load interval will be multiplied by 40 Naturally such a load should not be applied to the structure in one moment Therefore it 1s necessary to subdivide the interval in several load steps In this case the interval will be divided in 50 load steps The loading history can be prescribed by selecting item Data Interval Data in the main menu see Figure 112 After selection of this command the Interval data window will appear and the data which should be defined are depicted in the Figure 113 Detailed information about Loading history you can find in ATENA GiD User s Manual Interval data Loading history Some examples are in Example Manual ATENA Science Tutorial for Construction Process p GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static gt mm Files View Geometry Utilities Mesh Calculate ATENA Help wo ai si OB A 68284 Povem gt 187 19 C
29. r in postprocessor ATENA Science GiD Tutorial 131 GD GiD Atena Static 2D and 3D Interface Project AtenaResults KEE X A Files View Utilities Do cuts View results Options Window Help M gt rairai E z E OBwslwoeest B a Qre gt E By 9 P 0446313 r Normalt No Units m Gp CB je Toggle between pre and postprocess COD1 D 0 0008733 0 00077627 i 0 00067923 This icon should be selected to switch 0 0005822 0 00048517 between pre and post processing posts 0 0002911 0 00019407 9 7033e 05 0 Pick LEFTMOUSE to desplace view ESC to quit Contour Fill COD1 Min 0 Max 0 0008733 Command Figure 172 Switch between pre and postprocessing General Load and Forces Strain Stress Fatigue Interface Steps Import Options CRACK WIDTH DISPLACEMENTS EIGENVECTORS IMPERFECTIONS C PERFORMANCE INDEX E PHYSICAL PARAMETERS C SOFT HARD PARAMETER C CURRENT NODAL COORDINATES C REFERENCE NODAL COORDINATES Figure 173 The selection of the data which should be available for the post processing For example the FRACTURE STRAIN can be chosen The definition of post data is completed by selecting Accept button see Figure 174 Then the button Close can be pressed and the GiD will switch to post process automatically But there in the post process the data from ATENA has to be imported again 132 ag It 1s done by the clicking on the ATENA icon Then t
30. selected the New SOLID Concrete window appears see Figure 54 Figure 53 Description of the new material creation New SOUD Concrete Cancel Figure 54 The window for the definition of the New SOLID Concrete Parameter input Enter new SOLID Concrete name Beam ATENA Science GiD Tutorial 43 When the new material is created its name will be offered in the pull down menu see Figure 55 This new material should be selected and then its parameters can be changed SOUD Concrete Jelolx me laneous Elernent Geometry Concrete EC2 Cementitious User Cementitious SHCC Cementitiouss Reinforced Concrete Microplane M4 SBETA Material Beam was Strength lass 30 3 Last Genexat Newly created material named Beam Figure 55 The selection of the New SOLID Concrete material The parameters of the new material Beam are predefined according to Eurocode 2 In this example it is necessary to have parameters of concrete class 20 25 and Safety Format should be Mean It can be done by selecting this class parameter and safety format in the material window The process of the class and safety format definition is depicted in the Figure 56 It 1s very important to select checkbox Generate Material otherwise no parameters will be updated All parameters definition is completed by clicking on the Update Changes icon ES 44 EC al Basic Tensile Compressive Miscellaneous G
31. step Appearance Font size li Line width Add zero point con Figure 153 The diagram properties definition 120 Parameter input Tick Show legend for series L D Convergence diagram Xx L D MB Loadil42_REACTIONS 000010 DOF 3 0 015 0 01 Load MN 0 005 0 0 0001 0 0002 0 0003 0 0004 0 0005 Displacement m Figure 154 The defined L D diagram Detailed description of the L D diagram creation can be found in the ATENA Studio Manual 7 chapter 3 5 When the new diagram is created the tab window is added to ATENA Studio layout Default layout command in the main menu can be used to organize all windows and restore original window appearance After selecting the option Default layout Window Default layout in the main menu all user defined widows will be closes Only one window with structure and convergence criteria diagram stay open see Figure 155 But user defined diagrams are not lost It is possible to open previously defined L D diagram using command View All diagrams L D ATENA Science GiD Tutorial 121 a ShearBeam3D Atena Studio File Edit View Project Output Window Help Postprocessor 4 OERBOSZSPEX NN SMP BS HRBAGEL Pause analysis Interrupt analysis Step 8 Iteration 10 Assembling Stiffness Internal Forces Group 105 Elem 65 Convergence diagram w X View settings toolbox Convergence diagram l so A B Criter 1 i Criter 3 MM Criter
32. 0 115 y 0 0 Bi Duplicate entities I gt a J Do extrude Mo Create contacts Maintain layers Multiple copies 1 fe aoe y 0 054349 feel 7 0 mil ml UF button to complete the translation see Figure 22 20 Entities type Lines nie oe Parameter input F por Entities type Lines Num x DO Mos Transformation Translation B First point x 0 0 second point Num x 0100 a 0 0 y 0 0 y B z 00 z 0 0 See Second point x 0 100 Do extrude Wo y 0 0 Create contacts Z 0 0 Maintain layers n Do extrude No Cancel Figure 20 The parameter definition of the second line S GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static E j 25 Files View Geometry Utilities Data Mesh Calculate ATENA Help B S o 24 BS ay M This line should be selected o for the translation Z Entities type Lines hd B SS Transformation Translation o a First point M Mur x 0 0 A y 0 0 vy Ss z 00 second point Mum x 0 100 y 0 0 z DD Duplicate entities Do extrude No Create contacts The button eas has to be selected to eas translation Maintain layers Maltiple copies 1 i i E l Press Finish to end se Figure 21 The selection of the line which should be copied ATENA Science GiD Tutorial 21 n GiD Atena tatic 2D and 3D Interface Project UNNAMED A
33. 3D Atena Studio File Edit View Project Output Window Help Postprocessor 4 Heeso x Pause analysis Interrupt analysis otare View style l Solid with surface mesh v Time 7 00000 9 Light on ATENA g V 4307516 License 4001 w Deformations v Cracks z m o v Results 0 0002 Displacement m Analysis steps g X Monitoring points Number State Iterations Name Value Analysed ConvergenceMonitor Criter 1 0 000714458079293182 Analysed ConvergenceMonitor Criter 2 0 0284455963241074 Analysed ConvergenceMonitor Criter 3 0 0376853069983491 Analysed ConvergenceMonitor Criter 4 Analysed Analysed Analysing ee Output Message Error Monitoring points Figure 152 The L D diagram showing stage of the running analysis The diagram parameters were defined Now the diagram properties should be set It is done by the selecting of the Properties icon X After that the graph property window will appear and properties can be described The window is the same as for adding new diagram There can be changed names of both axes and can be added new series It can be useful to show a legend for series This option is can be found in Appearance tab The diagram properties dialog is depicted in the Figure 153 and the definition of new diagram is finished by pressing the OK button see Figure 154 Diagram properties Diagram title L D Monitor type filter Each
34. ATENA Command Figure 3 Problem type menu and basic ATENA icons It is also recommended to explore the help of the program GiD This can be found in the Main menu or by pressing F1 on your keyboard It is also much recommended to save file and also regularly save created model during the formation of the geometrical model Saving is done by selecting File Save or Save as The name of the document can be chosen for example 3DBeam ATENA Science GiD Tutorial 7 3 1 1 2 Problem Data Before starting the model definition it is advisable to define some global analysis parameters It is done by the command Data Problem Data Problem Data in the main menu see Figure 4 Gp GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static 2 a Files View Geometry Utilities Mesh Calculate ATENA Help e s T TA ed om ee et Problem type Layer 4 2 ek Conditions Materials Interval Data Data units Post data Interval The Problem Data can be also executed by this icon Y ie Could not connect to server x 0 6014 42 conditions read 17 materials read S y4 Command B 2 0 Figure 4 The command Problem Data After selecting this command the Problem Data window will appear see Figure 5 There the Title and Task Name should be changed to rename files where the results of the analysis will be saved When the analysis is finished all results are saved in files From those fil
35. C 22 EC Basic Tensile Compressive Miscellaneous Element Geometry Generate Material Select checkbox and click update changes button to generate the material Strength Class 12 15 Safety Format Design Last Generation was Strength Class 12 15 Last Generation was Safety Format Design Unassign Figure 52 The window for the definition of the SOLID Concrete 42 First it is important to copy material definition of the already existing material and save it under a new name In this case the new name shall be Beam and it should be created based on the predefined material Concrete EC2 After the selection of the predefined material 1 e material Concrete EC2 the icon New SOLID Concrete should be selected The selection of this material and selection of the New SOLID Concrete icon are depicted in the Figure 53 After the selection of the New SOLID Concrete icon the new window for the definition of the new material name will appear see Figure 54 Here the name Beam should be written and OK button is used to complete this command SOUD Concrete ce Jelelx ka Concrete EC iti laneous Element Geometry Cementitious2 Cementitious SHEE 1 The pull down menu with options of predefined materials will appear after the clicking on the arrow In this case the Concrete EC2 should be chosen Lasi IED EATON was strength Lias 2 This icon starts the creation of the new material Once this icon is
36. C material properties Generate Material Last Generation Type of reinforcement Last Generation Young s Modulus E 200GPa Last Generation Characteristic Yield Strength f xk 500MPa Last Generation Class of Reinforcement Last Generation Safety Format Design Reinforceme Unassign Figure 72 The window for the definition of the 1D Reinforcement First it is important to copy material definition of the already existing material and save it under a new name In this case the new name will be Bars The predefined material Reinforcement EC2 should be chosen for the copying After the selection of the predefined material the icon New 1D Reinforcement should be selected After the selection of the New ID Reinforcement icon the new window for the definition of the new material name will appear see Figure 73 Here the name Bars should be typed and then it 1s necessary to press OK button to complete the command New 1D Reinforcement O Enter new 1D Reinforcement name Figure 73 The window for the definition of the New 1D Reinforcement ATENA Science GiD Tutorial 55 Parameter input Enter new 1D Reinforcement name This new material should be selected and then it is possible to change the parameter definition The parameters of the new material Bars are predefined according to Eurocode 2 In this example the Mean Yield Strength should be 560 MPa and Class of Reinforcement should be A The parameter
37. Command H z 0 Figure 128 The selection of the beam volume 98 Now the mesh can be generated It is done by command Mesh Generate mesh or it can be activated directly by pressing the key Ctrl and g at the same time After that the enter value window will appear see Figure 129 Here it 1s necessary to define the default element size for the volumes that are not mesh using the structured option There the value 0 065 can be left and the button Ok can be pressed The generation of the mesh will start and then the list of elements will appear The number of elements can be checked in that list see Figure 130 It is necessary that the total number of elements is below 300 This limit is necessary only for the demo version of ATENA If a full version of ATENA is available it is recommended to use more elements The generation of the mesh 1s finished by selecting button Ok see Figure 131 Mesh generation Enter size of elements to be generated i Get meshing parameters from model OK ii Figure 129 The enter value window Dialog window Num of linear elements 38 Num of Tetrahedra elements 121 Slur of Hexahedra elernents 160 Jum of nodes 408 Figure 130 The list of the elements of the mesh ATENA Science GiD Tutorial 99 Gb GiD Atena Static 2D and 3D Interface Concentrate elements SORTIR iy pl L sl I M P AK TE EK ETR ROTT EN E TY prs S14 M A k
38. D Atena Studio File Edit View Project Output Window Help Postprocessor 4 Mun ofA xX SCOP SBS HRHYMEEL Convergence diagram Convergence diagram Crack Width P 4 B Criter 1 BH Criter 3 Codl EE Criter 2 E Criter 4 View style m 00016749 Solid with surface mesh v eC 0 00020864 00014394 Light on Max cracks level 3 Show cracks Min cracks width 0 Width multiplier 20 Auto Manual 0001204 15 0 00096853 v Deformations 000073309 Deformations 000049764 i 00002622 26754e 005 Convergence criteria 1 0 5 Step Iteration Value 10 State Iterations Value Analysed ConvergenceMonitor Criter 1 0 00204289850072373 Analysed ConvergenceMonitor Criter 2 Analysed ConvergenceMonitor Criter 3 0 371360901751476 Analysed ConvergenceMonitor Criter 4 0 000653110306503566 Analysed Load1142_REACTIONS 000010 DOF 3 0 0351642299305761 MN Deflection1392_DISPLACEMENTS 000010 X 3 Pen of load in interval LC coeffs 34 4 Analysing SSS l Output Message Error Monitoring points Figure 163 View settings toolbox with Cracks panel 126 ospe View style Parameter input oku Cracks in elements p Deformations Max cracks level i Cracks Show cracks Min cracks width Cracks in elements Wi a t h mu t j p j er Max cracks level 3 Min cracks width 0 0001 Width multiplier Auto
39. E p te Entered new Interval data Leaving x D 9291 Using interval 1 E S Y 1 6506 Command BR z0 Figure 114 The Generate mesh command 90 Mesh generation Enter size of elements to be generated Get meshing parameters from model OK Cancel Figure 115 The program offer the size of mesh Dialog window Num of linear elements 38 Num of Tetrahedra elernents 914 Num of nodes 89 Figure 116 The numbers of elements and node of this geometrical model The demo version of the GiD is limited to 1000 nodes The example of this tutorial contains 789 nodes Therefore the automatic sized mesh could be generated see Figure 117 But the demo version of ATENA is limited to 300 elements see Figure 118 And this mesh contains almost 3000 elements therefore this mesh will not be functional in ATENA and the number of element should be decreased It can be done by using the structured mesh option which allows better control about the number of generated elements Also in structural analysis it 1s usually preferred to use brick elements Therefore in the next steps of the mesh generation the option to create six side brick element will be described In this case the structured mesh will be specified only for the beam volume because it is an important part of the structure for the structural analysis ATENA Science GiD Tutorial 91 ne Gp GiD Atena Static 2D and 3D Interface Pro
40. GiD interface the process info will appear Through this dialog the program asks if the process of the analysed problem 1s finished or if the post processing should be started The button Postprocess should be selected see Figure 166 Process info Figure 166 The button Postprocess should be pressed But before any post processing features can be used the results from the ATENA have to be imported into GiD es It is done by the clicking on the Import results from ATENA icon Then the process of importing will start see Figure 168 and when it is finished the model changes its colours see Figure 169 128 GD GiD Atena Static 2D and 3D Interface Project 3D Beam Files View Utilities Do cuts View results Options Window Help e E ipn This icon should be selected to import ry aa results from ATENA into GiD L E 7 E iil Figure 167 The GiD postprocessor interface GD GiD Atena Static 2D and 3D Interface Project 3D Beam OB o 68 22 m HDB gt res a la ZB p n 372 e 283 r Normal t No Units m GiD B h Files View Utilities Do cuts View results Options Window Help Gy AtenaConsole AtenaResults inp Atena execution has been restored from the file C USERS CCC DESKTOP JIM 3D BE AM GID ATENACALCULATION 3D Beam 66067 Atena execution has been restored from the file C USERS CCC DESKTOP JIM 3D BE AM GID ATENACALCULATION 3D Beam 6668 ee kaZa
41. MP X Convergence diagram Convergence diagram BB Criter 1 B Criter 3 deformation scale 1075 Time 3 00000 ATENA V S 007345 License 4001 U u W u c wv D w gt c o U Units ConvergenceMonitor Criter 1 0 490459655923182 ConvergenceMonitor Criter 2 5 14666372971088E 05 ConvergenceMonitor Criter 3 2 19257724111632E 05 eMonitor Criter 4 2 52423092202632E 05 Load1945_REACTIONS 000010 DOF 3 5 75465922498596E 17 MN Deflection2291_DISPLACEMENTS 000010 X 3 of load in interval LC coeffs 165 JH gt i Output Message Error Monitoring points Figure 138 The ATENA Studio interface window S 3DBeam Atena Studio File Edit View Project Output Window Help Oe SOKRK TOP BE HRMUREL deformation scale 1075 Time 3 00000 ATENA V 5S0 07345 License 4001 The moved loading steel plate Figure 139 The moved loading steel plate ATENA Science GiD Tutorial 105 There should be Info window in the GiD see Figure 140 This informative window can be closed and the definition of the missing contacts can be started see 4 1 0 GiD Atena 5tatic 2D and 3D Interface Project 3D Beam Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help OB 8 SSe BAlS bem S 22 MH Info window Info You can only define Truss or Cables in the first Interval Inf
42. Manual Value 12 5681653530784 f we Results Figure 164 Cracks panel options A ShearBeam3D Atena Studio File Edit View Project Output Window Help He R efOePK SMP SBS H4HEBLEHBI EL Pause analysis Interrupt analysis Step 44 Iteration 30 Assembling Stiffness Internal Forces Group 105 Elem 1 View Codl m 0001708 00014676 00012272 000098676 000074636 000050596 000026556 25158e 005 0 00021524 deformation scale 2564 Time 44 0000 ATENA W 430 7516 License 4001 Figure 165 The crack width value on structure surface with cracks drawn as lines All of these options of drawing cracks and results on the structure are in fact post processing features of ATENA Studio But they can also be used during the execution of the nonlinear analysis This is one of the unique features of ATENA software During analysis execution all ATENA post processing capabilities are available For more information it is recommended to study ATENA Studio Manual 7 ATENA Science GiD Tutorial 127 5 POST PROCESSING The created model can be post processed in the ATENA Studio or in the GiD ATENA post processing was already briefly described in the previous Section 4 4 5 1 GiD Post processing After finishing the nonlinear analysis ATENA Studio window can be closed The program asks if all changes should be saved Then button Yes should be selected in all cases Then back in the
43. Output Window Help OR ese X O P SB HRBYUEEL Step 4 Iteration 5 Assembling Stiffness Internal Forces Group 105 Elem 97 M View gt X View settings toolbox oer WB Criter MM Criter 2 View style Solid with surface mesh gram Time 4 00000 P Light on f 4 Define new diagram p X l v Deformations 0 6 Diagram title Diagram v Cracks Monitor type filter Each step v v Results 04 Horizontal axis Vertical axis Appearance wv E E 1 U U 1 U w D j m gt O O Axis value zj Multiplier 1 Diagram settings Axis label Switch axis orientation Number State Iterations Cancel 1 Analysed 2 2 Analysed 2 ConvergenceMonitor Criter 2 0 0347744389705694 3 Analysed 2 ConvergenceMonitor Criter 3 0 0305117015417942 E 4 Analysing 5 ConvergenceMonitor Criter 4 5 03546412546857E 05 iC Load1142 REACTIONS 000010 DOF 3 0 0143610170909434 MN Deflection1392_DISPLACEMENTS 000010 X 3 0 000244283360795544 m of load in interval LC coeffs 24 Output Message Error Monitoring points Figure 150 The execution of the graph The diagram title can be L D and the monitor type filter should be Each step For the horizontal value the name Deflection DISPLACEMENT should be selected The name o
44. Q OLE kK SDP 89 HKMU REL Pause analysis Interrupt analysis Step 44 Iteration 14 Convergence diagram Convergence diagram MB Criter 1 Mi Criter 3 MB Criter 2H Criter 4 View style 0001573 Solid with surface mesh v 00013526 Light on 00011321 9 V 000091164 000069117 000047071 Draw deformed model Scale 15 1 2 9769e 005 Absolute Relative Draw de formed 00001907 Relative deformations 10 model Convergence criteria 0 5 Show undeformed model 20 Time 44 0000 l aes Step Iteration ATENA Crack racks vy v Results State Iterations Name Value i Analysed 5 ConvergenceMonitor Criter 1 0 000486025933796076 Analysed 5 ConvergenceMonitor Criter 2 0 0299237639679714 Analysed 19 ConvergenceMonitor Criter 3 0 0187436937311603 Analysed ConvergenceMonitor Criter 4 30 Analysed 30 Load1142_REACTIONS 000010 DOF 3 0 0351642299305761 MN Analysed 30 Deflection1392_DISPLACEMENTS 000010 X 3 0 00362271475176417 i of load in interval LC coeffs Analysing 14 Output Message Error Monitoring points Light on y i a Deformations Draw deformed model Scale CD Absolut Relative Relative deformations 10 A Show undeformed model None w wj Cracks Results Figure 161 Deformed model settings ATENA Science GiD Tutorial 125 fa ShearBeam3D
45. SE to desplace view ESC to quit Layer beam is OFF Command Figure 90 The execution of the division command After the executing the divide command the cursor will change into this shape and the appropriate surface should be selected Once the surface is selected a dialog window will appear on the screen see Figure 91 ATENA Science GiD Tutorial 69 Gi GiID Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files Wiew Geometry Utilities Data Mesh Calculate ATENA Help OB Soe BAl pates S Z Double click here to integrate the window BX BABT Name v C VO FU Tr B The green lines represent axis bars SB of the U and V direction plats v eg T m Dialog window U Sense has to be selected Once this button is selected the Enter value Select surface to divide Choose NURBS sense Command Figure 91 The dividing of the surface The dialog window asks for a direction along which the surface should be divided The possible directions are denoted as U and V and they are represented as green axes in the graphical area In this case U Sense should be chosen since it is necessary to divide the surface along the U direction Once the U Sense button is chosen the program asks for the number of the divisions Top surface should be divided into two parts see Figure 92 70 Enter value window Figure 92 The enter value window Parameter input Enter number of divisions 2 The
46. SG 24F B5 8 amp ay S Z om P i oe This line should be selected Entities type Lines 7 y mi for the translation gt 5 Transformation Translation First point Mum x 0 0 second point Num 0 115 y 10 0 z 02 1 0 gt Duplicate entities pa Do extrude Mo ee Create contacts The button Finish has to be selected a to complete the translation ik 6 Multiple copies 1 Finish Press Finish to end st Figure 18 The selection of the line which should be copied ATENA Science GiD Tutorial 19 Gn GiD Atena Static 2D and 3D Interface Project UNNAMED AtenaStatic Files Wiew Geometry Utilities Data Mesh Calculate ATENA Help OBA BG24F B519 G bw e Selected 1 Lines Geometry has 1 new lines 2 new points Leaving Command Figure 19 The new copied line Now the new line will be copied again to create the second edge of the top plate The width of the plate is 0 100 m Therefore the second line will be translated by 0 100 m The parameter definition is depicted in the Figure 20 After the definition of all parameters the Select button should be pressed Then the line required for copying can be selected in the graphical area see Figure 21 After the selection of the line it is necessary to press Finish S13 4 Entities type Lines n Transformation Translation First point Nurmi x 0 0 y 0 0 z 0 0 Second point Num x
47. al creation After the selection of the icon New SOLID Elastic the new window for the definition of the new material name will appear see Figure 66 Here the name Plates should be written and then it is necessary to press OK button to complete this command New SOLID Elastic Enter new SOLID Elastic name Plates Cancel Figure 66 The window for the definition of the New SOLID Elastic material Parameter input Enter new SOLID Elastic name Plates ATENA Science GiD Tutorial 51 Then the new material should be selected and then the parameter definition can be changed by clicking on the icon Ve In this case of the elastic material the default parameters will be left unchanged SOUD Elastic Ea Basic Miscellaneous Element Geometry Material Prototype CCSDElastlsotropic Young s Modulus E 2 0E 5 MPa Porson s Ratio MU 0 3 Unassign Figure 67 The default Basic parameters of the elastic material SOUD Elastic Rho Density 0 0025 Thermal Expansion Alpha 0 000012 SOUD Elastic k ce Plates Basic Miscellaneous Element Geometry Geometrical Non Linearty LINEAR M Idealisation 3D hi C Non Quadratic Element Figure 69 The default Element Geometry parameters of the elastic material 52 When the elastic material parameters are defined the material can be assigned to the geometry It is done by selecting the button Assign in the bottom of the material window
48. and one of the vertical beam edges shall be selected see Figure 124 Enter value window Enter another number of cells to assign to lines Figure 123 The number of cells for height of the beam Parameter input Enter number of cells to assign to lines ATENA Science GiD Tutorial 95 BD GiD Atena 5tatic 2D and 3D Interface Project 3D Beam Atena 5tatic Files View Geometry Utilities Data Mesh Calculate ATENA Help OBA 2602718510 tam S M x D 034065 Added 1 new lines to the selection Enter more lines ESC to leave y 0 13573 Command Ba z 0 Figure 124 The selection of the height lines Next step is to assign the number of element along the width of the beam The 2 cells should be defined to these lines Procedure is same like in previous two examples Enter value window Enter another number of cells to assign to lines Figure 125 The number of cells for width of the beam Parameter input Enter number of cells to assign to lines 96 g GiD Atena Static 2D and 3D Interface Project 3D Beam Atena Static Sos Files View Geometry Utilities Data Mesh Calculate ATENA Help 8 BIBS BP B51A ben S13 4 oe Select lines to define structured mesh Added l new lines to the selection Enter more lines ESC to leave Command Figure 126 The selection of the width lines Now all necessary divisions are defined and the command is completed by s
49. beam cf M plates eg The lines of the reinforcement has to be selected 1D Reinforcement EC2 Basic Reinf Function Miscellaneous Element Geometry Name Reinf Geometrical Non Linearity LINEAR Geom Type NORMAL Elem Type ElsoTruss Embedded Reinforcement The button Finish has to ME be selected to complete Embed Short Bars the assignment of the Quadratic Elements material Default Application Application from Interwal 1 Idealisation 1D fe Exchange x ose Enter Lines to assign to Material Bars Added 2 new lines to the selection Enter more lines ESC to leave Command Figure 79 The assigning of the Bars material into lines E All materials are created and assigned The icon Draw all materials K fi can be used to check if all materials are correctly assigned But before that it is important to display all layers and their content It is simply done by clicking on the grey bulb which should je E change to the yellow after the clicking Then the Draw all materials icons can be used See Figure 80 ATENA Science GiD Tutorial 59 Gi GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help OB 3162718719 br S137 ar Double click here to integrate the window Name W LC VO FU Ir B bars i g beam lo The two blue dots represent the x reinforcement bars Pick LEFTMOUSE to desplace view ESC to quit 1 1391 Pic
50. button OK should be pressed in the enter value window After that the surfaces is divided see Figure 93 GiD AtenaV4 Static 2D and 3D Interface Project 3DBeam monitors Files View Geometry Utilities Data Mesh Calculate ATENA Help 10 S 218 59 OB B 2 Gill version s bars tc E v plates cf B Layer Touse v plates On Off Color a n HDB se New Delete Rename alphabetic To back v SendTov Close Surface divided Can continue Select surface to divide Command Figure 93 The divided top surface ATENA Science GiD Tutorial 71 Now the middle line can be divided into two parts It can be done by executing command Geometry Edit Divide Lines Num Division or by the icont After the execution of this command the enter value dialog will appear Here the number of required divisions is to be written The line should be divided in two divisions see Figure 95 Gol GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static ee eal Files View Utilities Data Mesh Calculate ATENA Help e s T A Sasso j lt gt ee plates es p P Gp P Layers E i m Double click here to integrate the window Move point IK BO By Join Polylines Near point io SE Lines operations Sl Surfaces Parameter df Swap arc Ti Volumes Relative Length tuo Polyline Length SurfMesh SS Create k Delete k i Rebuild surface by boundary Edit NURBS Convert t
51. ce GiD Tutorial 1D Reinforcement Bars zj EC 2 Basic Reinf Function Miscellaneous Elernent Geometry kg Rho Density 7850 3 TI Thermal Expansion Alpha 0 000012 Active in Compresion Exchange Figure 77 The default Miscellaneous parameters of the reinforcement 1D Reinforcement Bars EC2 Basic Reinf Function Miscellaneous Element Geometry Name Reinf Geometrical Non Linearity LINEAR Geom Type NORMAL Elem Type CCIsoTruss Embedded Reinforcement Minimum 1 0e s Embed Short Bars Quadratic Elements Default Application Application from Interval 1 Idealisation 1D Unassign Exchange Figure 78 The default Element Geometry parameters of the reinforcement When the bar material parameters are defined the material can be assigned to the geometry It is done by selecting the button Assign in the bottom of the material window After this the several options will appear In this case the Bars material will be assigned to two straight lines Therefore the option Lines should be selected Then the lines of the 58 reinforcement can be selected in the graphical area and the button Finish has to be pressed to complete the assignment see Figure 79 Gi GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help S 42 9 Double click here to integrate the window PSA easy Mame W C VO WU Tr B r bars v cf B
52. conditions of the same name are connected together Do not connect selected DoFs Use current coordinates Unassign Master Bottom 1 0 M 0 0000 Pick LEFTMOUSE to desplace view ESC to quit Pick LEFTMOUSE to rotate ESC to quit if present mouse wheel zooms Command Figure 147 The contact conditions im B the clicking in the icon EA all boundary condition can be displayed It is a good method for checking 1f all conditions were properly defined see Figure 148 ATENA Science GiD Tutorial 113 Gi GiID Atena Static 2D and 3D Interface Project 3D Beam Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help wm eo Sb BS GQ bem z B First monitor and displacement Top slave contact Bottom slave contact Bottom master contact Pick LEFTMOUSE to desplace view ESC to quit Pick LEFTMOUSE to rotate ESC to quit If present mouse wheel zooms Command Figure 148 All boundary conditions When the contact conditions are finished it is important to generate mesh again After any change of boundary condition and geometry the mesh has to be generated again It is done by the command Mesh Generate mesh in the main menu or by pressing the key Ctrl and g at the same time If the new mesh is generated the analysis can be started again It is done by using the command Calculate Calculate or by the clicking on the icon E After selecting this command th
53. conditions will appear The option Constraint for Line should be selected Basic Coordinate System GLOBALW r Constraint i By clicking on this button the several options 7 Constraint will appear The option GLOBAL coordinate system has to be selected The support is in the vertical direction Therefore the Z Constraint has to be selected In order to prevent any rigid displacement the Y Constrain should be selected too Assign Entities Draw Unassign By this button the monitor can be assigned to the geometry see Figure 87 Close Figure 86 The support condition definition Parameter input Constraint for Line Coordinate System GLOBAL Y Constraint Z Constraint im By clicking on the icon Fa the created condition can be drawn After clicking on that icon the support condition will be displayed on the assigned lines see Figure 88 ATENA Science GiD Tutorial 65 Gi GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help amp 3 166 82718510 phates S 42 9 Double click here to integrate the window oFoK BABY Name C YO WU Ir B bars eo E i beam 2 d O plates v e B Cian aS Constraint for Line Basic Coordinate System GLOBAL X Constraint Constraint Constraint 2 The button Finish has to be selected to complete support condition definition Press Finish to end sele
54. ction Enter Lines with new values Added 1 new lines to the selection Enter more lines ESC to leave Command Figure 87 The selection of the support line 66 80 GiD tena 5tatic 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help DBA Sed oS pate Z Double click here to integrate the window L ora KX BA BT Constraint for Line hd Name W Lat wha Tr B p bars R ct B Basic n 2 beam T og D Coordinate System GLOBAL M El X Constraint Constraint Constraint Pick LEFTMOUSE to desplace view ESC to quit Command Figure 88 The support condition 3 4 2 Displacement On the top plate a predefined displacement should be specified This displacement will be located in the middle of the loading plate top plate and the displacement should be defined 0 0001m in the z direction This load should be applied on a point in the middle of the top plate However this point does not exist yet Therefore first the geometry of the top plate has to be modified The point should lie in the centre of the top surface This point has to be part of the top plate geometry It cannot be simply created on the surface Therefore the top surface will be divided into two surfaces and then the line which separates these surfaces will be also divided into two parts Then the middle point can be used to for the application
55. d bars layer is automatically activated The activation is indicated by the checkbox symbol The reinforcement geometry is assigned into the bars layer by pressing of the icon Then the pull down menu will open see Figure 42 The reinforcement geometry contains two types of entities and all of them should be moved into the bars layer Therefore the item Also lower entities has to be activated and the command Lines should be chosen After selecting the Lines in the pull down menu the geometry which should be send to the bars layer can be selected see Figure 43 Finish button completes the layer assignment ATENA Science GiD Tutorial 35 Gol GiID Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files Wiew Geometry Utilities Data Mesh Calculate ATENA Help TETIN Name w Also lower entities Surfaces Volumes Dimensions All Os 2 The option Also lower entities has to be y active 3 Then the Lines should be selected Figure 4 42 The definition of Send to command for the reinforcement layer Ga GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static ea Files View Geometry Utilities Data Mesh Calculate ATENA Help OB 6624 85 08 bs S 42 9 Selected lines of the reinforcement these lines will ED be sent to the bars layer after Na ax oe eT O E the pressing of Finish button i ress Finish to end selectior Sail 43 The selection of the lines which should
56. definition is depicted in the Figure 74 It is very important after all changes are updated to select checkbox Generate Material and do update again Otherwise no parameters will be updated All parameters definition is completed by clicking on the Update Changes icon 1D Reinforcement Bars P r Rj EC 2 Basic Reinf Function Miscellaneous Element Geometry Type of reinforcement Reinforcement 5 The Update changes icon has to be selected to complete parameter definition Young s Modulus E 200 GPa Characteristic Yield Strength f xk 560 MPa Class of Reinforcement A Eacilan n kel mna E s UKR I E Parameter k 1 05 Safety Format Mean 4 The Characteristic Yield TEEB s Strength should be changed to to save material properties Next select checkbox below and click S60 MPA update changes button againto generate the EC magerial properties 2 The Class of Reinforcement should be changed to class A Generate Material It 1S important to Last Generatic reinforcemen ieee all help notes Last Generation Young s Modulus E 200GPa 3 The Safety Format should be 1 The Generate Material checkbox changed to Mean has to be selected to generate properties of parameters Unassign Figure 74 The description of the reinforcement definition In the Basic properties the bar diameter and number of bars can be defined By checking the checkbox Calculator dialogs for the profile definition will appear
57. definition of the monitor condition starts by the icon P or by executing command Data Conditions in the main menu The monitor condition definition is depicted in the Figure 105 The monitor condition is applied on the point gt To A By the clicking on the arrow the several options will appear The option Monitor for point has to be selected Monitor for Point It is also possibile to set the global monitors Output Data REACTIONS By the clicking on this button the available Dir X monitoring guantities will appear The option Dir Y REACTIONS has to be selected F Diz lt O Draw Each Iteration The monitor point will monitor reactions in the Z direction therefore this checkbox has to be MonttorName Loa dl selected Assign Entities Dew The name of the top plate monitor will be Load Close By this button the monitor can be assigned to the geometry see Figure 106 Figure 105 The first monitor condition definition Parameter input Monitor for point Output Data REACTIONS Dir Z Monitor Name Load ATENA Science GiD Tutorial 81 Gi GiID Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help 31668718510 phates S 42 9 Conditions ae Double click here to integrate the window we a thy E NAB CELTA Ai Monitor for Point Name W a mpun z ape It is also possibile to set the global
58. dition 3 4 3 Symmetry Condition The beam of this example is symmetrical Therefore only half of the beam is analysed and it is necessary to enforce the axis of the symmetry along right side of the beam This means that the horizontal x displacements along this side should be equal to zero It can be done by definition of the boundary condition on the surface see Figure 101 Condition command can be executed by the icon P or by the Data Conditions in the main menu The symmetry condition definition is depicted in the Figure 102 ATENA Science GiD Tutorial 77 BD G6iD Atena Static 2D and 3D Interface Project UNNAMED Atena Static El j Files View Geometry Utilities Data Mesh Calculate ATENA Help OB SlSGBP 1 BA pates S182 2 ca Double click here to integrate the window oX BA BT Name W L VO TU Ir B je beam y cT E The surface where the symmetry condition should be defined The symmetry condition is applied on the surface therefore this icon should be a S Tae selected Conditions Constraint for Surface ae By the clicking on the arrow the list of available conditions will be offered The option Constraint for Surface has to be X Constraint selected C Constraint The X Constraint has to be selected to obtain symmetry condition By this button this condition can be assigned to the geometry see Figure 103 Parameter input Constraint for Surface Coordinate
59. e Compressive Miscellaneous Element Geometry Excentricity EXC 0 52 eT Dir of pl Flow BETA 0 0 Rho Density 0 0025 Thermal Expansion Alpha 0 000012 Unassign Exchange Figure 60 The default Miscellaneous parameters of the concrete class 20 25 SOK x e EC2 Basic Tensile Compressive Miscellaneous Element Geometry Geometrical Non Linearity LINEAR g Idealisation 3D _ Non Quadratic Element Unassign Figure 61 The default Element Geometry parameters of the concrete class 20 25 When the Beam material parameters are defined the material can be assigned to the geometry It is done by selecting the button Assign in the bottom of the material window After this the several options will appear In this case the Beam material will be assigned to the beam which is a volume Therefore the option Volumes should be selected Then the volume of the beam geometry can be selected in the graphical area and the button Finish has to be pressed to complete the assignment 48 GD GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static sa Files View Geometry Utilities Data Mesh Calculate ATENA Help OB S 1S6271 8519 8 bem 8 82 M ca Double cli ck here to integ rate the v SAK BO BT Mame C Fo FU Tr B The volume of the i plates beam has to be selected SOUD Concrete m Beam EC Basic Tensile Compressiwe Miscellan
60. e 113 The contact conditions Parameter input Interval Multiplier Number of Load Steps ATENA Science GiD Tutorial 89 3 6 Mesh Generation The generation of a finite element mesh is the last step in pre processing Because it should be possible to create this tutorial example in demo version of ATENA and GiD it is necessary to use a rather coarse mesh The demo version of ATENA is limited to 300 elements so the generated model should satisfy this limit The easiest way of the mesh definition is to use automatic generation Program will automatically define the smallest suitable mesh This command can be executed by selecting Mesh Generate mesh see Figure 114 or this option can be activated directly by pressing the key Ctrl and g at the same time Then the program asks for the definition of the size of the generated mesh see Figure 115 The default size of the mesh can be used By the selecting Ok button the mesh will be generated and the list of elements and nodes of the mesh will appear see Figure 116 GD GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static S Files View Geometry Utilities Data Calculate ATENA Help co fe OSD BGP s Uma Structured SemiStructured Cartesian Boundary layer Quadratic type Element type Mesh criteria Reset mesh data Draw Edit mesh je Show Errors IEW Mesn boun Create boundar ha Mesh quality Le options from model aE T od Fi fi
61. e CC3DNonLin Cementitious n Base Material Prototype CC30NonLinCementitious2 hi Young s Modulus E 30000 MPa Poisson Ratio MU 0 7 l Tension Strength FT 22 MPa ee S Compresion Strength FC 28 MPa 4 Unassign Exchange EE EE EC2 Basic Tensile Compressive Miscellaneous Element Geometry l Material Prototype CC3DNonLinCementitious2 S azi a Base Material Prototype CC3DNonLinCementitious2 m MPa Poisson s Ratio MU 0 2 Tension Strength FT 1 64 MPa Compresion Strength FC 28 48 MPa Unassign b Figure 57 The default Basic parameters of the concrete class 20 25 before a and after b adjustment Parameter input Young s Modulus E 31720 MPa Tension Strength FT 1 64 MPa Compression Strength FC 28 48 MPa 46 x EC Basic Tensile Compressive l Miscellaneous Element Geometry Fracture Energy 6F Fixed Crack _ Activate Crack Spacing _ Activate Tension Stiffening _ Activate Unloading factor Figure 58 The default Tensile parameters of the concrete class 20 25 EC2 Basic Tensile Compressive Miscellaneous Element Geometry Plastic Strain EPS CP 0 0010333 Onset of Crushing FCO 4 62 Figure 59 The default Compressive parameters of the concrete class 20 25 ATENA Science GiD Tutorial 47 SOKe EC Basic Tensil
62. e Delete icon should be selected to delete Layer0 l dc E tu 1 The Layer0 has to be selected Figure 4 47 After deactivation of the plates layer the graphical area will stay empty The Layer0 is active and it does not contains any geometry therefore it can be deleted It is recommended to try to display each layer separately to verify that they contain all required geometry The correct results are shown in Figure 48 Figure 49 and Figure 50 ATENA Science GiD Tutorial 39 gn GiD tena Static 2D and 3D Interface Project UNNAMED AtenakStatic Files View Geometry Utilities Data Mesh Calculate ATENA Help OB S Soe OS DS amp bem Double click here to integrate the window ora easy Name CVO FU Tr B S ka m beam e S E plates t m Figure 48 The displayed beam layer contains beam volume BD GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static e xs Files View Geometry Utilities Data Mesh Calculate ATEMA Help OB B1 SG2 BF Q amp bars S 2 M C VO FU Tr v E a A Figure 49 The displayed bar layer contains reinforcement lines 40 GD GiD Atena Static 2D and 30 Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help O22 3 66 37 85 pate Double click here to integrate the window LeK easy Name W C YO WU Tr B r bars F M beam cof A Figure 50 The displayed plat
63. e layer contains plate volumes 3 3 Material Parameters This tutorial example contains three entities which are made from three different materials These three entities are concrete beam steel plates and reinforcement bars In this chapter the characteristics of materials will be defined and then the material will be assigned to an appropriate geometrical entity 3 3 1 Concrete Beam Before definition of the concrete beam material it is good to display only the beam layer The material definition of the beam starts by selecting the icon ia or with the command Data Materials SOLID Concrete in main menu see Figure 51 ATENA Science GiD Tutorial 41 ga GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static S 182 1 9 Files View Geometry Utilities Mesh Calculate ATENA Help O jl A o eo 22 Problem type d beam Conditions SOLID Elastic Interval Data SOLID Steel E Problem Data gt Data units SOLID Soil Rock SHELL Concrete Steel Interval BEAM Concrete Local axes 1D Reinforcement Interface Spring Layer plates is OFF Command Double click here to integrate the window oX BA BY Name W C VO FU Tr B bars S B beam v e lt B plates cf E Figure 51 The selection of the command for the definition of the concrete material After the selection of this command the window for the definition of the SOLID Concrete appears see Figure 52 Concrete E
64. e program will first generate ATENA input file for the non linear analysis and then the ATENA Studio window will appear and analysis will be in progress see Figure 149 114 4 2 ATENA Studio Interface Description ShearBeam3D Atena Studio ile Edit View Project Output Window Help Postprocessor 4 Fe O AE E O P SB HRBYUEEL Pause analysis Interrupt analysis Step 4 Iteration 5 m Assembling Stiffness Internal Forces Group 105 Elem 97 Convergence diagram w X View settings toolbox Convergence diagram so A B Criter 1 Mi Criter 3 Window D MM Criter 2 B Criter 4 View style Solid with surface mesh v Time 4 00000 Light on 0 8 ATENA Vi43 07516 WindowF F License 4001 V Deformations 0 6 v Cracks Convergence criteria 0 4 N o t v Results Number State Iterations Value 1 Analysed ConvergenceMonitor Criter 1 0 00144803605019486 Analysed ConvergenceMonitor Criter 2 Analysed ConvergenceMonitor Cri ConvergenceMonitor Cri Window A Output Message Error Monitoring points Figure 149 The analysis in progress Basic description of the ATENA Studio interface Window A contains analysed steps and iterations Window B contains important messages from ATENA kernel sent during analysis Window C contains settings for displayed results Window D contains progress of analysis number of steps and iterations
65. ed Parameter input Coordinates of points 1 0 0 0 1 275 0 0 2 3 1 275 0 19 0 4 0 0 19 0 NOTE The table named Parameter input will guide you through the whole tutorial This table shows the parameters which should be entered There are predefined default parameters in some dialog windows The table Parameter input shows only parameters which should be changed After entering coordinates the points appear in the graphical area see Figure 7 It is useful to enlarge the model such that it fills the whole screen For that the command View Ej Zoom Frame in the main menu or the Frame icon can be used see Figure 8 Gi GiID Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help OB S Soe OSIE bw 82 gt 0 0 19 0 Entered point 4 Enter point Command Figure 7 Four created points before zooming 80 6iD Atena Static 2D and 3D Interface Project UNNAMED Atena Static B mm Files View Geometry Utilities Data Mesh Calculate ATEMA Help B43 66241 8519 bw 3 9 gt 0 0 19 0 Entered point 4 Enter point Command fa z 0 Figure 8 Using of the Zoom frame icon enables to have a better view of the created geometry Next step is to connect these points by lines Lines are created using the command Geometry Create Straight line in the Main menu or by clicking on the icon N The
66. efinition of the reinforcement starts by selecting the icon Wy or with the command Data Materials 1D Reinforcement see Figure 71 Gi GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static n j 23 Files View Geometry Utilities Mesh Calculate ATENA Help EO a aiia OB ORG Poem 12 9 Conditions Aaterials SOLID Elastic Double click here to integrate the window E ER Interval Data SOLID Steel ora K BA BT d Problem Data SOLID Concrete Name W C VO FU Tr B Data units SOLID Soil Rock bars W a B SHELL Concrete Steel beam E rr ta o Interval REAM Concrete plates f d g Local axes S Interface Spring Layer bars is ON x 0 65521 Layer plates is OFF PSE y 2 0341 Command Ba 2 0 Figure 71 The selection of the command for the definition of the reinforcement material After the selection of this command the window for the definition of the 1D Reinforcement will appear see Figure 72 54 1D Reinforcement Reinforcement EC EC 2 Basic Reinf Function Miscellaneous l Element Geometry Type of reinforcement Reinforcement Young s Modulus E 200 GPa Characteristic Yield Strength f xk 500 MPa Class of Reinforcement Choose Class v Epsilon u k 0 05 Parameter k 1 08 Safety Format Design First click update changes button to save material properties Next select checkbox below and click mu update changes button againto generate the E
67. electing the Close button in the Enter value window above After the structured mesh definition the element type have to be changed Predefined element type is tetrahedra It is better to use hexahedra mesh It is done by command Mesh Element type Hexahedra see Figure 127 Then the volume of beam has to be select as on the Figure 128 Use Escape button to finish ATENA Science GiD Tutorial 97 GD GiD Atena Static 2D and 3D Interface Project 3D Beam Atena Static b E s h Calculate ATENA Help Files View Geometry Utilities Data 9 O 7 C OT al iogh Unstructured x cp amp Structured SemiStructured Cartesian Boundary layer k Quadratic type k Mesh criteria Linear Reset mesh data B n Triangle Ure ED een Quadrilateral lt Generate mesh Ctrl g Circle Erase mesh e su Tetrahedra MEETA Heahede m Show errors Prism View mesh boundary Sphere ees Create boundary mesh a Mesh quality rs E Mesh options from model Figure 127 The selection of the hexahedra type Gb GiD Atena Static 2D and 3D Interface Project 3D Beam Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help OBA Seo 2 p S T beam er wee Ts ro l nea ane Ps Pa E E Enter volumes to assign this element type dded1 new volumes to the selection Enter more volumes ESC to leave y 0 55728
68. en the display crack width can be defined see Figure 179 The process of displaying of the crack width is described in the chapter 4 4 More information about post processing can be found in ATENA Studio Manual 7 ATENA Science GiD Tutorial 135 4 Atena Studio ile Edit View Project Output Window Help LR of B Create new project from input file P Create new project from result files T Open existing project v Recent projects Uspo dat v Nov slo ka p Sta en soubory Knihovny a Dokumenty a Hudba 3DBeam 0021 3DBeam 0022 3DBeam 0023 3DBeam 0024 E Obr zky E Videa 2 Dom c skupina m i Po ta 3DBeam 0025 3DBeam 0026 3DBeam 0027 3DBeam 0028 amp M stn disk C ca M stn disk D N zev souboru 3DBeam 0025 All files Figure 177 The result file opening 4 Atena Studio ile Edit View Project Output Window Help as i k of B Create new project from input file 9 Create new project from result files T Open existing project vw Recent projects T sui Figure 178 The project properties 136 4 3DBeam Atena Studio File Edit View Project Output Window Help eV PSB HRBHEEL z0 88 o0 X View A al sis steps Step J Activate step 25 Number State 25 Analysed amp Saved Figure 179 The crack width display of the 25 step 5 Iterations Keep in Mem E ConvergenceMonitor Criter 1 ConvergenceMonitor Cr
69. enerate Material 4 The Update changes icon has to be selected to complete parameter Strength Class 20 25 N definition Format Mean Select checkbox and click update changes button to generate the material 2 The Strength Class 20 25 It is important to read 20 2 houd beselected a4 all help notes 1 The Generate Material 3 The Mean Safety Format checkbox has to be should be selected selected to update any nassign Exchange parameter changes Figure 56 The description of the class definition After updating of EC 2 parameters the rest of parameters will change automatically The following pictures show the generated material parameters of concrete class 20 25 See Figure 57 Figure 58 Figure 59 Figure 60 and Figure 61 If needed it is possible to modify these generated default parameters However it should be understood that the manual definition changes every time the Update changes button is selected It is not recommended to modify these default parameters unless the user is an expert in nonlinear modelling and simulation In this tutorial problem the generated parameters will be modified to get consistent with the original material properties and with the other versions of this Tutorial The tensile strength is reduced to account for Shrinkage ATENA Science GiD Tutorial 45 Concrete EC by a EC2 Basic Tensile Compressive Miscellaneous Element Geometry l Material Prototyp
70. eous Element Geomet Geometrical Non Linearity LINEAR n Idealisation 3D hu Mon Quadratic Element The button Finish has to be selected to complete assigning of the material Press Finish to end selection Unassign Enter Volumes to assign to Material Bearn Added 1 new volumes to the selection Enter more volumes ESC to leave zez d a Z Command Figure 62 The assigning of the CONCRETE material to the volume The beam material was created and assigned Now in the following section the steel plate material will be created ATENA Science GiD Tutorial 49 3 3 2 Loading and Supporting Steel Plates Before definition of the loading and supporting plate material it is a good idea to display only the plate layer Loading and supporting steel plates are made from steel material It 1s assumed that the load level will not be so high to cause any plastic deformation in the plates Because of that an elastic material will be used for the steel plates The material definition starts with the command Data Materials SOLID Elastic in the main menu see Figure 63 Gi GiID Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Mesh Calculate ATENA Help Problem type plates F 3 2 op Conditions laterial Double click here to integrate the window Interval Data SOLID Steel a ES KBA ES T E Problem Data SOLID Concrete Name C VO FU Tr E Data un
71. es results can be executed and processed lately Therefore it is useful to rename the title of the files where results should be saved and it is useful to do this saving in the beginning of the any creation of project Later it could be forgotten Problem Data DE Global Settings Solution Parameters Global Options Transport Restart Calculation from Calculated Step Calculation Analysis Static MER a Title could be for example Shear beam CPE VEION r Title Shear a Task name could be 3DBeam TaskName 30 Beam CalculateIn AtenaStudio The button Accept has to be selected to finish the definition After that the window can be closed Figure 5 The Problem Data definition Parameter input Title Shear beam TaskName 3DBeam 3 2 Geometrical Model This chapter describes definition of the geometrical model Because the beam is symmetric only half of the beam will be created in this example The geometrical model of this half beam see Figure 6 1s composed of three 3D regions and two reinforcement bars In GiD the 3D regions are called Volumes Therefore the geometrical model contains three volumes beam loading and supporting plates The reinforcement is modelled by two straight lines The definition of these geometrical entities is described in the subsequent chapters It is useful to use the layer function for the definition of the geometrical model It is a function where particular parts
72. essed It 1s done by selecting View Results Default Analysis Step ATENAResults2GiD in the main menu or by the Default Analysis Step icon EE From the L D graph Figure 154 it is possible to see that structure failed after 50 step therefore it is good to post process for example step 35 see Figure 170 GD GiD Atena Static 2D and 3D Interface Project AtenaResults bala Files View Utilities Do cuts Options Window Help No Results 9 res A iy BZ ee n 434 e 313 r Normalt No Units m GiD CB No Graphs Contour Fill Smooth Contour Fill Contour Lines Contour Ranges Show Min Max Display Vectors Iso Surfaces KO OOM O U amp UN Fr v v gt PP e Yv sp i Stream Lines Fr o Node trace Fr Graphs Result Surface Deformation r F W N r Un Line Diagram z k A a pos r o Integrate k k SB amp amp oT GREBRER View file C Users ccc Desktop JIM 3D Beam gid 3D Beam post vv successfully read Selected new analysis and step Command Figure 170 The selection of the step which should be post processed 130 By the clicking on the Contour fill icon or by the selecting the command from main menu View results Contour Fill CRACK WIDTH COD1 crack width can be displayed like in previous chapter see Figure 171 Go GiD Atena Static 2D and 3D Interface Project AtenaResults k n S Files View Utilities Do cuts Options Window Help No Result
73. etry Utilities Data Mesh Calculate ATENA Help OB Sl SSB 1 BF amp bs S13 ca 2 Then move the mouse and select the next line point Leaving line creation 1 new lines gt 0 83004 Enter points to define line ESC to leave E y 0 65083 Command B z 0 Figure 24 The creation of the top line to finalize the rectangle for the bottom surface of the top plate ATENA Science GiD Tutorial 23 After connecting lines into a rectangle the surface should be created For that it 1s useful to use an automatic surface definition with the command Geometry Create NURBS surface Automatic When this automatic method is used the program asks for the number of bounding lines see Figure 25 After definition of this number the program automatically creates all possible surfaces with the given number of bounding lines Enter value window Parameter input Enter Number of lines 4 Enter Number of lines Ok Cancel Figure 25 The definition of number of bounding lines After clicking on the OK button the required surface is created see Figure 26 Then the button Cancel should be selected to leave this function Gb GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static 3 Files View Geometry Utilities Data Mesh Calculate ATENA Help OB 3126807185108 Lyo 822 M The pink rectangle of the new surface Created 1 new surfaces Leaving NurbSurface creation No changes Com
74. ew Geometry Utilities Data Mesh Calculate ATENA Help OB BlSCV2P1 Bl SY amp bem S18 U Select volumes to define structured mesh Added 1 new volumes to the selection Enter more volumes ESC to leave Command Figure 120 The selection of the beam volume which should be structured Enter value window Enter number of cells to assign to lines Figure 121 The number of cells for length of the beam Parameter input Enter number of cells to assign to lines 16 When the number of cells is defined the button Assign has to be pressed to select lines which should be structured The 16 cells will be assigned to the beam length When one of the longitudinal edges of the beam volume is selected the program automatically detects which lines should have the same number of cells to guarantee the generation of a structured mesh see Figure 122 94 E GiD Atena Static 2D and 3D Interface Project 3D Beam Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help OB Bl S621 Bl amp bem Select lines to define structured mesh Added 1 new lines to the selection Enter more lines ESC to leave Command Figure 122 The selection of the length lines After the selection the ESC key should be pressed to return to the definition of number of cells Then the 5 cells should be defined and assigned to the height of the beam see Figure 123 Then the selection can be done by selecting the button Assign
75. f axis should be Displacement m and orientation should be switched The vertical axis can display more series Add new series the name for the vertical value should be Load_REACTIONS and axis label can be Load MN The series definition must be applied by the OK button above Axis label The definition of the diagram parameters 1s finished by clicking on the OK button After this the L D diagram is shown on the left side of the ATENA Studio interface This diagram is showing actual stage of the running analysis and it changes as the analysis progresses based on the current loads and deflections ATENA Science GiD Tutorial 117 118 Diagram title L D Monitor type filter Each step Horizontal ads Axis value Deflectionl332 DISPLACEMENTS v AS Multiplier 1 Axis label Displacement m Switch axis orientation m O OO Diagram title L D Monitor type filter Each step Axis label Switch axis orientation Define new diagram Diagram title L D Monitor type filter Each step Add series Remove series Axis label Load MN C Switch axis orientation NA Ok Cancel Figure 151 The diagram definition Parameter input Diagram title L D Horizontal axis Axis value Deflection DISPLACEMENT Multiplier 1 Axis label Displacement m Vertical axis Add new series Load REACTIONS Multiplier 1 Axis label Load MN ATENA Science GiD Tutorial 119 a ShearBeam
76. f the beam near its bottom surface where the largest vertical displacement can be expected The displacement in the z direction should be evaluated at this location The conditions command can be executed by the Data Conditions in the main menu or by the icon The second monitor condition definition is depicted in the Figure 108 ATENA Science GiD Tutorial 83 The monitor condition 1s applied on the point Conditions che aa cies 2 P E TT oi Ti By the clicking on the arrow the choice of T available point conditions will appear The Monitor for Point option Monitor for point has to be selected It is also possibile to set the global monitors in Pri Output Data DISPLACEMENTS EB By the clicking on this button the several Dir x options will appear The option Dir DISPLACEMENT has to be selected W Dir Z The monitor point will monitor reactions in Draw Each Iteration the Z direction therefore this checkbox has MonitorName Deflection to be selected nn The name of the top plate monitor will be Assign Entities Draw Deflection Clos By this button the monitor can be assigned to Close the geometry see Figure 109 Figure 108 The second monitor condition definition Parameter input Monitor for point Output Data DISPLACEMENT Dir Z Monitor Name Deflection By clicking on the icon Fa the created condition can be drawn After clicking on that icon the monitor condition will be
77. gure 157 122 8 ShearBeam3D Atena Studio ile Edit View Project Output Window Help Postprocessor 4 OEBOSPEX 9 P eae SBEHPBIEL Pause analysis Interrupt analysis Step 8 Iteration 14 Convergence diagram Convergence diagram EE Criter 1 E Criter 3 _ Ciiter 2 Criter 4 Time 3 00000 ATENA V 430 7516 f License 4001 l vw Value limit 0 6 Clipping Convergence criteria 0 4 0 2 2 4 Step Iteration State Iterations Name Value Analysed ConvergenceMonitor Criter 1 0 00053432169971108 Analysed ConvergenceMonitor Criter 2 0 026529683343156 Analysed ConvergenceMonitor Criter 3 0 032386623511685 Analysed ConvergenceMonitor Criter 4 1 41753854967119E 05 Loadl142 REACTIONS 000010 DOF 3 0 019791328869216 MN Deflection1392_DISPLACEMENTS 000010 X 3 of load in interval LC coeffs 5 6 Output Message Error Monitoring points Analysed Analysed Analysing i Solid with surface mesh Light on Deformations v Cras f Results Show scalar results List of available quantities at global Location nodes in this case the CRACK WIDTH Nodes should be chosen Value Crack Width Item CODI should be selected to display first Codi crack width at each node There are at most three cracks at each node Draw iso areas Figure 157 View settins toolbox with result
78. he FRACTURE STRAIN can be found in the options for the post processing see Figure 175 to obtain this figure the 35 step has to be selected again General Load and Forces Strain Stress Fatigue Interface Steps Import Options ELEM INIT STRAIN INCR C EQ PLASTIC STRAIN EXTERNAL CABLE SLIPS FRACTURE STRAIN F MAXIMAL FRACT STRAIN E PLASTIC STRAIN C PRINCIPAL FRACTURE STRAIN E PRINCIPAL PLASTIC STRAIN E PRINCIPAL SHELL MEMBRANE STRAIN C PRINCIPAL STRAIN SHELL MEMBRANE STRAIN E SPRING STRAIN C STRAIN R1 STRAIN R2 C STRAIN R3 C STRAIN R4 C STRAIN 1 C STRAIN 52 C STRAIN 53 C TOTAL ELEM INIT STRAIN Figure 174 The selection of the FRACTURE STRAIN ATENA Science GiD Tutorial 133 GB GiD Atena Static 2D and 3D Interface Project AtenaResults o bee Files View Utilities Do cuts Options Window Help TE SDE S Z n434e313 r Normat No Units mg SB No Graphs Default Analysis Step gt m s Smooth Contour Fill DISPLACEMENTS Contour Ranges STRESS d eps f yy Show Min Max eps f zz Display Vectors gamma f xy Iso Surfaces gamma f yz Stream Lines gamma f xz Node trace Si FRACTURE STRAIN Graphs Sii FRACTURE STRAIN Deformation Line Diagram Integrate Siii FRACTURE STRAIN 4892e 06 0 00039602 0 00079693 0 0011978 0 0015987 0 0019997 0 0024006 0 0028015 0 0032024 0 0036033 Pick LEFTMOUSE
79. ializing process Wait please Figure 137 The initializing of the analysis If the creation of the geometrical model and definition of the boundary conditions were done right the static analysis should be finished in one minute Then in the Geometry window it is possible to see that the loading steel plate strangely distorted and shifted see Figure 139 by the applied loads Due to that the structure could not be calculated correctly It is because there 1s no connection defined between the concrete beam and the steel plates Program does not automatically detect possible contact between volumes Contacts have to be added manually by boundary special conditions Therefore it is necessary to return back to GiD graphical interface and defined fixed contacts ATENA Studio can be simply closed without any savings of data and then it is necessary to return back to the GiD graphical interface and define the missing contacts It should be noted that this problem is a direct consequence of the modelling approach that was chosen in the previous section In this tutorial the geometry is created by three individual and separated volumes In such a case contacts have to be added manually If the corresponding surfaces of the steel plates would be also parts of the geometry of the beam all parts of the structure would be connected and no special condition would have to be defined 104 File Edit View Project Output Window Help 20 88 eee X S
80. icate entities Mo Do extrude Create contacts Maintain layers Multiple copies 1 Press Finish to end se Z x 0 74356 y 0 51175 ER Entities type Volumes Translation v Transformation First point Num x 0 0 y 0 0 Ls 0 0 Second point x 081 Num y 0 0 mE Duplicate entities Do extrude No Create contacts Maintain layers Multiple copies 1 Pick LEFTMOUSE to desplace view ESC to quit Pick LEFTMOUSE to rotate ESC to quit if present mouse wheel zooms 28 Command Figure 32 The bottom and top plates 3 2 3 Reinforcement Bars The geometry of reinforcement bars will be defined only by two lines The first bar will be created and then the second bar will be copied The creation of the first bar starts by clicking the icon N or with the command from the main menu Geometry Create Straight line The command line in the bottom of the main window should be used for the coordinates definition The coordinates of the reinforcement are 0 05 0 05 0 05 and 1 275 0 05 0 05 See Figure 33 GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static leo Files View Geometry Utilities Data Mesh Calculate ATENA Help amp 2 31662371 8F 10 Ly 8 22 M a Figure 33 The first reinforcement bar Parameter input Coordinates of the line 1 0 05 0 05 0 05 2 1 275 0 05 0 05 ATENA Science GiD Tutorial 29 Second reinforcement bar
81. ick here to integrate the window u J z l E Bit Move point j M SK BO BY Da ae fS Name CVO UT B Join L eg E a amp 3 Swap arc T Volumes Near point p a Polyline PD Parameter SufMesh Rebuild surface by boundary i Edit NURBS Convert to NURBS Simplify NURBS hod Hole NURBS surface 0 Hole volume o Uncollapse Intersection Surface boolean op E as 3 Volume boolean op Figure 82 The executing of the division command After the execution of the divide command the cursor will change into this shape and the surface required for dividing should be selected Once the surface is selected the dialog window will appear on the screen see Figure 83 This dialog asks for the direction along which the surface should be divided There are U and V direction and in the graphical area it is possible to see green axis representing U and V direction In this case U Sense should be chosen Once the U Sense button is chosen the program asks for the number of the divisions Bottom surface should be divided into two parts see Figure 84 62 BD GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help OBS So 0 28b DA 9D phates Double click here to integrate the window The plate layer has to be active The oFGX BA BY 3 o Name W C VO FU Tr B activation sy
82. inates Close Figure 141 The master top beam contact condition Parameter input Fixed Contact for Surface Type of Cond MASTER Contact Name Top ATENA Science GiD Tutorial 107 Gi GiD Atena Static 2D and 3D Interface Project 3D Beam Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help OBA SSVes BF bem Z H Conditions afr pub aR ri gm CATE oo Fixed Contact for Surface Type of Cond Master ContactName Top You can have multiple Master Slave connections identified by different names Only Master and Slave cp together J 2 The button Finish has to be Do notcojnect selected to complete contact secura coo condition definition Press Finish to end selection Draw Unassign 1 The selection of the surface for the contact condition Pick LEFTMOUSE to rotate ESC to quit if present mouse wheel zooms gt y 0 8115 Pick LEFTMOUSE to rotate ESC to quit if present mouse wheel zooms E Command Figure 142 The selection of the surface for the master top beam contact condition Next the command draw condition can to be selected to display and verify condition definition The button Draw should be selected in the bottom of the Conditions window After clicking on that button several options will appear see Figure 143 For example the Colors can be selected and the master contact condition will be drawn see Figure 144 108
83. is important to select the correct volume representing the top plate After the selection of volume it is necessary to press Finish button to complete the translation see Figure 32 Entities type Volumes Parameter input Entities type Volumes Num x 00 Transformation Translation c First point x 0 0 uss o y 0 0 second point Num x 081 Z 0 0 ju Second point x 0 81 Transformation Translation HE y 0 0 Duplicate entities as O 3 5 Do extrude No Do extrude No Create contacts V Maintain layers Multiple copies 1 Select Cancel Figure 30 The parameter definition ATENA Science GiD Tutorial 27 Project UNNAMED Atena Static Mesh Calculate ATENA Help Utilities Data Gb GiD Atena Static 2D and 3D Interface Files View Geometry OBA 66241 BA D amp G bw The red colored selected volume The button Finish has to be selected to complete translation Enter Volurnes to Copy ddedi new volumes to the selection Enter more volumes ESC to leave Command Gb GiD Atena Static 2D and 3D Interface Files View Geometry Utilities Data Mesh Calculate O8 82love 6510 Layer Project UNNAMED Atena Static Figure 31 The selection of the volume which should be copied ATENA Help Volumes r Entities type Translation v Transformation First point Mum x 0 0 y 10 0 0 0 k n second point Mum x 0 81 y 0 0 0 35 Fa Dupl
84. ished by pressing ESC key S GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help O88 SlISG24F1 B51 B be 137 9 points to define line ESC to leave Z x 0 4167 Leaving line creation 0 new lines E y 0 1879 Command Ba z 0 Figure 10 The lines connected into a rectangle The GiD distinguishes four types of entities point lines surfaces and volumes In our case there are already two entities points and lines Lines define a rectangular boundary but it is not a surface until a surface is defined Therefore the next step is to create a surface using the already existing lines It is done by selecting Geometry Create NURBS surface By contour in the main menu and then selecting all lines defining the required surface in the graphical area see P Figure 11 Clicking on the icon can also start the Create surface function Next the lines bounding the surface should be selected and then it 1s necessary to press ESC key to complete the surface definition The newly created surfaces are denoted by a pink colour as seen in the Figure 11 80 GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATEMA Help O82 31268718510 byo 822 M The pink rectangle defines a surface Enter lines to define NurbSurface ESC to leave Leaving NurbSurface creation
85. iter 2 ConvergenceMonitor Criter 3 ConvergenceMonitor Criter 4 Load1142_REACTIONS 000010 DOF 3 000023877 000020597 000017316 000014035 000010754 7 4728e 005 4 1919e 005 9 1096e 006 237e 005 x Y z Time 25 0000 ATENA V 4307516 License 4001 Value 0 00016560029373441 0 00704544580942056 0 00681420727242639 11 16672789552991E 06 1 0 0322719084635899 _ MN Deflection1392 DISPLACEMENTS 000010 X 3 0 00209921793513557 m of load in interval LC coeffs ATENA Science GiD Tutorial otake View style Solid with surface mesh v Light on Y Deformations o Results Show scalar results Location Value 137 6 CONCLUSION This tutorial provides a step by step introduction to the usage of ATENA GiD on an example of a reinforced concrete beam without shear reinforcement Although this example is relatively simple from geometrical and topological point of view it is not a simple problem from the numerical point of view Due to the missing shear reinforcement the beam fails by a diagonal shear crack which is very difficult to capture using smeared crack approach This example demonstrates the powerful simulation capabilities of ATENA GiD for modelling the brittle failure of concrete structures Even with a coarse mesh which was used in this demonstration example the diagonal shear crack was successfully captured Further improvement of the res
86. ject UNNAMED Atena Static oo Biles View Geometry Utilities Data Mesh Calculate ATENA Help OB S ec 3 eS petes L po M n x Ce ar fie M i A r ize changed automatically to some entities Mesh generated To see it use command meshview Continuing in DEMO mode ATENA Version 5 8 8 c Cervenka Consulting 1999 2812 CCFEModelExc Number of elements in DEMO version is limited to 388 Figure 118 The limitation of demo version of ATENA In this example the beam will have structured brick mesh and steel plates will be meshed with tetrahedral elements 3 6 1 Notes on Meshing The finite element mesh quality has a very important influence on the quality of the analysis results the speed and memory requirements Refining only the important parts can save a lot of processor time and disk space 92 A bad mesh like a single layer of volume elements in a region where bending plays a significant role can produce very wrong results see the Mesh Study example in the ATENA Engineering Example Manual A minimum of 4 6 elements per thickness 1s recommended for at least gualitative results in bending Alternatively shell elements may be used see section Shell Material in the User s Manual for ATENA GiD 3 6 2 Structured Mesh Because this example should be possible to create in demo version the mesh of the beam volume will be struc
87. k LEFTMOUSE to rotate ESC to quit if present mouse wheel zooms y 0 19363 Command Ba z 0 Figure 80 The drawn assigned materials 3 4 Boundary Conditions In this chapter the boundary condition are described The analyzed beam is supported at the bottom steel plate in the vertical direction There the support condition will be defined Since only a symmetric half of the beam is analyzed it is necessary to enforce the fixed condition along the right side of the beam It means that the horizontal displacements along x axis should be equal to zero The beam is loaded at the top steel plate The object of this example is to determine the maximal load carrying capacity of the beam It means that it should be possible to trace the structural response also in the post peak regime The easiest method to accomplish this is by loading the beam by prescribed displacements condition at the top steel plate It is important to monitor forces displacement or stresses during the non linear analysis The monitor data are important information about the state of the structure For instant 60 from monitoring of applied forces it 1s possible to determine if the maximal load was reached or not In summary there are four types of the boundary conditions in this example monitors support displacement and symmetry conditions 3 4 1 Support The analyzed beam is supported at the bottom steel plate in the vertical direction The
88. l SOLID Soil Rock r bars of M SHELL Concrete Steel a o E Interval pr ae e BEAM Concrete i plates w 8 d D Local E 1D Reinforcement Interface Spring After the selection of this command the window for the definition of the SOLID Elastic will appear see Figure 64 SOLID Elastic Elastic 3D Basic Miscellaneous Element Geometry Material Prototype CCSDElastlsotropic Young s Modulus E 2 0E 5 MPa Poissons Ratio MU 0 3 Figure 64 The window for the definition of the SOLID Elastic 50 The process of the Elastic material creation is very similar to the creation of the Concrete material First it is important to copy the material definition of the already existing material and save it under a new name There is only one elastic material and it will be chosen to be copied for the material of this example The Elastic 3D should be selected and then the icon New SOLID Elastic O should be pressed The selection of this material and selection of the New SOLID Elastic icon are depicted in the Figure 65 SOUD Elastic Elastic 3D Elastic 3D 1 The pull down menu with options of predefined HF materials will appear after the clicking on the arrow In this case the Elastic 3D should be chosen 2 This icon starts the creation of the new material Once this icon 1s selected the New SOLID Elastic window appears see Figure 66 Close Figure 65 Description of the new elastic materi
89. l properties and boundary conditions The analytical model for the finite element analysis will be created during the pre processing with the help of the fully automated mesh generator The definition of the geometry starts with the creation of geometrical points These points are later connected into boundary lines The surfaces are defined by selecting appropriate bounding lines Volumes can be formed either by extrusion of surfaces or manually by selecting all bounding surfaces Three dimensional regions are modelled by volumes in GiD The reinforcement 1s modelled as a line These reinforcement lines are not usually connected to any surface or volume but they usually lie inside the volumes entities that form the concrete structure After creation of the geometry material properties should be defined and assigned to individual volumes Boundary conditions are used to define supports and loads The boundary conditions and loads are defined in GiD with the help of Intervals Interval represents a set of boundary conditions and loads that are applied in a specified number of steps An appropriate definition of intervals can be used to specify a complete loading history In ATENA analysis it is always useful to define monitoring points The monitoring points are used to see the evolution of certain quantities during the analysis For instance they can be used to follow the development of deflection or forces at given locations The monitoring p
90. lement mesh is used It is recommended that in the analysis of real engineering problems users use sufficiently fine meshes and if needed a mesh sensitivity study should be performed The step by step demonstration is performed on an example of simply supported beam which is loaded by two loads as it is shown in Figure 1 The problem is symmetric around its vertical axis therefore only one symmetric half of the beam will be analyzed It is recommended to print out this version in order to easily follow the instructions In case of printing it is advisable to use both sided and colour printing P P 1 steel plates Top plates Concrete B 35 Reinforcement bars 2x diameter 26 As 1060 mm2 Sa a Supporting steel plates Bottom plates 0 300 0 810 0 330 0 810 0 300 2 550 0 165 0 100 0 115 0 030 0 050 A 0 250 100 0 925 1 275 0 190 0 050 O90 10 050 Figure 1 Geometry of the structure ATENA Science GiD Tutorial 1 The steps necessary for the data preparation non linear analysis and post processing are depicted on subsequent figures which show the computer screen for each step and the corresponding user action There 1s always also a short description for each figure It should be noted that not all features of ATENA GiD system are described in this manual For more details about the data preparation and post processing the user 1s encouraged to read the
91. lities Data Mesh Calculate ATENA Help O82 31868207185 bem S142 M 1 The LayerO should be selected Double click here to integrate the window BAeasy E VO WU Tr B bem v We B r 2 Then the yellow bulb should be clicked to deactivate the Laver 3 Afterwards the yellow bulb change yellow colour to the grey Y Layer Layer is ON x 177T Layer Layer is OFF Z y 0 15457 Command B z 0 Figure 40 The steel plates and reinforcement geometry will disappear after deactivating of the Layer0 34 3 2 4 2 Bar Layer The next step is to create a bars layer This layer will be created with the same procedure like for the previous beam layer First the beam layer should be hidden and Layer0 should be displayed It is done by selecting the beam layer and pressing the yellow bulb Layer0 is displayed by selecting this layer and then by pressing the grey bulb Afterwards the beam geometry will disappear and the reinforcement and steel plates will appear in the graphical area see Figure 41 Ew GiD Atena tatic 2D and 3D Interface Project UNNAMED AtenatStatic A x Files View Geometry Utilities Data Mesh Calculate ATENA Help go 3 BEh BF SH GH Layer S 32 9 Double click here to integrate the window 2K Be BY Name W The reinforcement layer is created by pressing the icon a Then the reinforcement layer will appear in the list of layers and the name bars can be written The newly create
92. ll complete this command ATENA Science GiD Tutorial 37 GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static S o 1 After pressing Send to bution the pull down menu will appear Double ck here to integrate the window oF5 X BO BYT Name v w Also lower entities Dimensions All 3 Then the Volumes should be selected Figure 4 45 The definition of Send to command for the plates layer Gol GiD Atena 5tatic 2D and 3D Interface Project UNNAMED Atena Static El mm Files View Fr Utilities Data Mesh Calculate ATENA Help 06 BBP BF D amp D rate S14 H E vo FU Tr B let The button Finish has to be selected to complete Send to command Figure4 46 The selection of the volumes which should be sent to the plates layer 38 If the display of the plate layer is deactivated the volumes of the steel plates should disappear Deactivation is done by selecting the plate layer in the list of layers and then pressing the yellow bulb see Figure 44 The LayerO which is now active is empty It does not contain any geometry and therefore this layer can be deleted It is done by selecting this Layer and by pressing the icon A After that the Layer0 will be deleted see Figure 47 Ew GiID Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files Wiew Geometry Utilities Data Mesh Calculate ATENA Help O a od od 28 ns lt a m LayerO 2 Then th
93. mand Figure 26 The surface created by automatic surface creation 24 The geometry definition of the top plate will be finished by extrusion of the surface The extrusion is done by the Copy command which appears after selecting item from the main menu Utilities Copy The height of the steel plate is 0 030 m The definition of the extrusion is depicted in the Figure 27 After the definition of all parameters the Select button should be pressed Then the surface required for the extrusion can be selected in the graphical area see Figure 28 After the selection of surface it is necessary to press Finish button to complete the extrusion see Figure 29 a a Parameter input ee ee Entities type Surfaces Transformation Translation oo First point x 0 0 e o y 0 0 Second point Num x 00 Z 0 0 mo Second point x 0 0 Le 0o y 0 0 Duplicate entities Z O o O 3 Do extrude Volumes Do ext ru d e Vo umes Create contacts Maintain layers Multiple copies 1 Select Cancel Figure 27 The definition of the steel plate extrusion ATENA Science GiD Tutorial 25 GO GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static yee Files View Geometry Utilities Data Mesh Calculate ATENA Help 88166271 865198 bs 13719 Entities type Surfaces v The red colored Transformation Translation v selected surface First point Num x 0 0 y 0 0 gt z 0 0 Second point
94. manual of the program GiD and ATENA GiD manual 2 2 STARTING PROGRAM Before using the ATENA GiD system it is necessary to install it on your computer The programs GiD and ATENA can be installed using the standard ATENA installation At the end of the installation the user must select the installation of GiD and ATENA GiD interface After that your computer should be ready to run the example problem described in this document The installation process is described in detail in ATENA GiD manual 2 In order to start a nonlinear analysis in ATENA GiD system first the program GiD 1s started The recommended version is 11 0 1 or newer the oldest supported version is 7 7 26 The program GiD can be started from the start menu of your computer using the following path Start All Programs CervenkaConsulting ATENA Science GiD This opens the program GiD which is used for the preparation of the numerical model of the analyzed structure This process is described in the subsequent Chapter 3 The execution of the nonlinear analysis is described in Chapter 4 and the post processing in Chapter 5 ATENA Science GiD Tutorial 3 3 PRE PROCESSING 3 1 Introduction This chapter explains the basic steps which are to be performed in order to define a complete geometrical and then a finite element model for the non linear FE analysis by ATENA The purpose of the geometrical model is to describe the geometry of the structure its materia
95. mbol is Ne o m N i a amp T T A Dialog window cel lt U Sense has to be selected Once this button is selected an input window will appear see Figure 84 Sy a o iu The green lines represent axis of the U and V direction Select surface to divide Choose NURBS sense Command Figure 84 The enter value window Parameter input Enter number of divisions ATENA Science GiD Tutorial 63 The button OK should be pressed in the above dialog After that the surfaces is divided into two parts see Figure 85 Gp GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help amp 3 166 87 1051 0 phates 1 42 9 Double click here to integrate the window cX Savy Name C YO WU Tr G p bars cf r beam 2 d j ve s The new line for the support Surface divided Can continue Select surface to divide Command Figure 85 The divided top surface When the geometry for the support is created the support condition can be defined Conditions command can be executed by the Data Conditions in the main menu or by the icon The support condition definition is depicted in the Figure 86 64 Conditions a lat Constraint for Line i The support condition is to be applied on a line therefore this icon should be selected By clicking on the arrow the list of available line
96. monitors in Problem data dialog al Output Data REACTIONS x plates v je M Dir X Dir Dir Z Draw Each Iteration MoniterName Load Press Finish to end selection Unassign 1 The selection of the point for the monitor condition Pick LEFTMOUSE to rotate ESC to quit if present mouse wheel zooms Added 1 new points to the selection Enter more points ESC to leave Command fa z 0 Figure 106 The selection of the first monitoring point E By clicking on the icon F the created condition can be drawn After clicking on that icon the monitor condition will be displayed at the point in the top plate see Figure 107 82 Gi GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help OB SlSoSBe BAD petes S Double click here to integrate the window a gt CAT A BA 8 BT C VO WU Tr B Conditions Monitor for Point r It is also possibile to set the global monitors in Problem data dialog gt df m Output Data REACTIONS ud E Dir X E Dir Dir Z E Draw Each Iteration MonitorName Load Display of the monitor condition pa em te Hu ec Assigned 1 new Points to condition Monitor for Point press escape to leave 0 66513 Command fa z 0 Figure 107 The first monitor condition 3 4 4 2 Second Monitor The second monitor point should be located at the middle o
97. n the message window at the bottom will show the following sentence Enter points to define line ESC to leave The lines can be defined by entering exact coordinates into a command line or it is possible to directly pick the already existing points In this example the direct picking has been chosen ATENA Science GiD Tutorial 11 The direct picking can be done by selecting Contextual Join Ctrl a in the Mouse menu The Mouse menu can be found by clicking on the right button of the mouse in the graphical area see Figure 9 Alternatively this option can be activated directly by pressing the key Ctrl and a at the same time gol GiD Atena 5tatic 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help GEL 8F 9P 5 Zoom Rotate Pan in Redraw Render Label Layer of Switch full screen Image to clipboard s Quit Leaving point creation Enter points to define line ESC to leave Command Figure 9 The Join function in the Mouse menu Point In Line Point In Surface Tangent In Line Normal In Surface Arc Center Line Pararneter Options Undo Close Number Escape After selecting the join function the mouse cursor will change to this shape El Then after clicking into a graphical area the nearest point will be selected Now all points can be connected by lines into the rectangle see Figure 10 The create line function should be fin
98. nstraint El Z Constraint Pan E n ee i a Fa a 7 Display of the support condition a ae ha j Assigned 1 new Surfaces to condition Constraint for Surface press escape to leave Command Figure 104 The visualization of the applied symmetry condition 3 4 4 Monitors Monitors provide important information about state of the structure They can be used to monitor various important quantities during the analysis For instance it may be interesting to monitor the development of deflections or strains at certain critical locations during the nonlinear analysis In this example two monitors will be defined One monitor will be monitoring loads on the top plate and second one will monitor deflections in the middle of the beam The monitors are represented in GiD as a special condition that needs to be applied in the first interval In this example the monitors will be defined as a point condition at the top plate and in the middle of the beam 80 3 4 4 1 First Monitor The first monitor should be located on the top plate and it will be used to monitor the loads that are applied onto the structure It will be applied on the point where the displacement condition is also defined Since the loading is applied as prescribed displacement the applied forces are represented in the finite element analysis as reactions This means that the reaction in the z direction should be evaluated at this monitor The
99. o At the End of Input File is writen information about Load Intervals and Steps Info Input file was written and ts ready to be executed in AtenaWin Info At the End of Input File ts writen information about Load Intervals and Steps Info Input file was written and ts ready to be executed in AtenaWin Info Input file was written and is ready to be executed in AtenaWin Info You can only define Monitors in the first Interval Info You can only define Truss or Cables in the first Interval Info At the End of Input File is writen information about Load Intervals and Steps Info Input file was written and is ready to be executed in AtenaWin File written to C Users cec Desktop JIM 3D Beam gid WriteT est txt gt 0 11037 Process 3D Beam started at Tue Oct 16 13 22 06 has finished y 0 79454 Command fa z 0 Figure 140 The GiD interface after analysis 4 1 Missing Contacts The geometry is composed from three 3D regions concrete beam and two steel plates These regions should be connected together However in this example there is no connection yet Therefore suitable contact conditions have to be added In ATENA a suitable condition for connecting independent surface together is called Fixed Contact Fixed contact condition distinguishes Master and Slave conditions In this case the beam surfaces will be masters and plates will be slaves Therefore four contact conditions have to be added two ma
100. o NURBS Simplify NURBS Hole NURBS surface Hole volume Collapse Uncollapse Intersection Surface boolean op Volume boolean op Select surface to divide Leaving function No changes Command Figure 94 The dividing of the line Enter value window Fal Enter number of divisions Figure 95 The enter value window 72 Parameter input Enter number of divisions 2 After the specification of the required division the button OK has to be pressed and the appropriate line should be selected see Figure 96 The line selection is completed by pressing the ESC key has see Figure 97 Gi G6iD Atena Static 2D and 3D Interface Project UNNAMED Atena Static El j Files View Geometry Utilities Data Mesh Calculate ATENA Help OB Slo BF P pete S 22 M cp E i z Double click here to integrate the window FOK Sassy Name W C VO WU Tr E p bars a A i plates w T of Figure 96 The selection of the line ATENA Science GiD Tutorial 73 Gi GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help amp 3 1660 82718510 phates S 42 9 Double click here to integrate the window cX Savy Name v C VO WU Tr E r bars Tr beam P of i plates v o The middle point on which the displacement condition will be Select lines to divide Select lines to divide Command
101. of the prescribed displacement ATENA Science GiD Tutorial 67 The steel plates are assigned into the plate layer Therefore the plate layer should be activated and displayed The beam and bar layers can be hidden It is also recommended to zoom at the top plate see Figure 89 BD GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help OBA BGBP B51R pats S 42 9 Double click here to integrate the window ELL BA BT Name C VO WU Tr E p bars d E i plates v o Pick LEFTMIOUSE to desplace view ESC to quit A 2 1508 Layer beam is OFF E 13161 Command fa z 0 Figure 89 The activated plate layer and zoom view of the top plate The top surface will be divided using the command from the main menu Geometry Edit Divide Surfaces Num Divisions or by selecting Divide surface icon see Figure 90 68 EN GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help View geometry rs lt a CFs plates Create Move point a Lines Join A Polylines Lines operations T Swap arc olur Near point Folyline Farameter SurfMesh Split Rebuild surface by boundary Edit NURBS Convert to NURBS Simplify NURBS Hole NURBS surface Hole volume Collapse Uncollapse Intersection Surface boolean op Volume boolean op Pick LEFTMOU
102. of the model can be placed on different layers and then displayed hidden or locked etc In this geometrical model three separate layers will be created beam layer plates layer and reinforcement layer 0 165 0 100 0 115 0 030 0 030 0 320 0 050 p 090 10 050 0 190 Figure 6 The geometrical model is composed from three volumes beam and two plates ATENA Science GiD Tutorial 9 3 2 1 Concrete Beam A concrete beam forms the main part of the example This section describes the definition of the three dimensional beam geometry The geometry of the beam will be created by an extrusion of a rectangular surface That will be defined by four lines First step 1s to create points which will be later connected into a rectangular surface A point is created using the command Geometry Create Point in the Main menu In order to create a rectangle four points are needed Each point is defined by three coordinates x y z The coordinates of points should be written in the command line in the bottom part of the main window The coordinates can be written all together separated by comma A dot represents a decimal point The definition of coordinates of each point is completed by ENTER In the command line it 1s very handy to use the key arrow up and down on your keyboard to view previously entered coordinates These previous coordinates can be changed and entered again In this case the following points should be enter
103. of the top plate see Figure 100 ATENA Science GiD Tutorial 75 Gi GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help 31668718510 phates S 42 9 Conditions Double click here to integrate the window oe 8K BA BY Name C YO WU Tr E Displacement for Point m bars m USE decimal point DO NOT use comma of amp Coordinate System GLOBAL plates w dcd GB 4A Displacement 0 0 Y Displacement 0 0 Z Displacement 0 0001 1 The selection of the point for the displacement condition complete displacement condition definition Enter Points with new values Added 1 new points to the selection Enter more points ESC to leave Command Figure 99 The selection of the point for the displacement condition 76 Gi GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help 8631 S6241 8519 pate SZ Layers Double click here to integrate the window MN AH BKET Displacement for Point z A Name w pe bars USE decimal point DO NOT use comma beam Conditions Coordinate System GLOBAL plates v A Displacement 0 0 Y Displacement 0 0 Displacement 0 0001 Assigned 1 new Points to condition Displacement_for_Point press escape to leawe Command Figure 100 The visual display of the displacement con
104. oints are defined as special conditions that should be specified in the first interval 3 1 1 Introduction of the Graphical User Interface Before starting the definition of the geometrical model it is good to introduce the graphical user interface of ATENA GiD The main window is shown in the Figure 2 It shows the basic layout of GiD program right after its start and it explains the basic functionality of the various icons and menus This window shows the basic layout of the GiD program At this stage it contains only commands for the creation of geometric objects In order to activate ATENA specific materials and boundary conditions an appropriate problem type needs to be selected This is described in the next section ATENA Science GiD Tutorial 5 Files View Geometry Utilities Data Mesh Calculate Help RSH BASH b Main Menu The command of icons View Toolbar can be used for zooming and sam be found in the rotating of a created model Main Menu and vice versa gt an Create lines Toolbar can be used for The icon name will definition of straight and curved lines appear after leaving the mouse on the icon Surface and Volumes Toolbar can be used for definition of surfaces volumes and predefined volumes View XX plane icon Message window through which the program communicates with a user Command line for manual input of commands Pick LEFTMOUSE to rotate ESC to quit Figure 2 Graphical user interface of
105. ommand fal g z 0 Figure 35 The selection of the first reinforcement bar which should be copied GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static E x Files View Geometry Utilities Data Mesh Calculate ATENA Help OPa tp 651 ST Laver Entities type Lines r Transformation Translation First point Nur x 0 0 y 0 0 D second point Nur x 0 0 y 0 09 C Duplicate entities Do extrude Mo Create contacts Maintain layers Multiple copies 1 Selected 1 Lines gt y 0 97757 Geometry has 1 new lines 2 new points Leaving 0512 Command Ba 2 0 Figure 36 The first and second reinforcement bar ATENA Science GiD Tutorial 31 3 2 4 Layers Layers are useful feature of GiD The individual components of the created geometry can be separated into different layers In each layer and its components can be selectively displayed and the user can easily work only with the components of this layer In this chapter three different layers will be created concrete beam layer steel plates layer and reinforcement layer 3 2 4 1 Beam Layer It is good to start with the definition of concrete beam layer This is done by the command Layers which appears after selecting Utilities Layers in the main menu The beam layer will be created by writing beam into a window depicted in Figure 37 The new layer will be created after the pressing of the icon a Then the beam layer
106. onditions Materials Problem Data Data units Interval Local axes press escape to leave x 0 99291 Leaving drawing conditions function 1 6067 W Y Command EEE Ba 0 Figure 112 The Interval data command 88 Interval Data z Ox Basic Parameters Eigenvalue Analysis Use decimal point do not use comma Interval Is Active There is a predefined displacement 0 0001 m on the structure in this interval This means that it is necessary to increase Load Name Load vy Interval Multiplier 40 E Define Loading History the prescribed displacement approximately Type of Definition Manual 40 times to reach the failure of the ae Structure Generate Multiple Steps Therefore the Interval Multiplier will be Number of Load Steps 50 set to 40 in this case Store Data for this Interval Steps SAVE ALL It is a good practice in the m nonlinear analysis to always _ Read Transport Data apply the load gradually Transport Import EACH STEP Fatigue Interval NO Therefore the interval will be divided into 50 load steps in Interval End Time 0 04 this case iL Number of Transport pa teps This button should be selected to complete interval L to reintorcemd data definition Then this window can be closed MW Delete BC Data After Calculation Interval Starting Time 0 0 User Solution Parameters C Activate Interface Openning Accept Close Figur
107. onitorName Monitor M re Monitor condition signed 1 new Points to condition Monitor for Point press escape to leave Command Figure 110 The second monitor condition Now all boundary condition should be defined For control it is recommended to display im boundary condition It can be done by clicking on the icon Fa see Figure 148 86 GD GiID Atena Static 2D and 3D Interface Project 3D Beam Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help SERPS IE rom Sl A Load monitor and displacement condition condition Symmetry Deflection monitor Pick LEFTMOUSE to rotate ESC to quit if present mouse wheel zooms Pick LEFTMOUSE to rotate ESC to quit Command Figure 111 All boundary conditions 3 5 Intervals Loading History This section describes the definition of the loading history for the analysis of Leonhardt s shear beam The loading history in GiD consists of intervals Each interval is divided into load steps Because in this case the structure is loaded by only one type of force defined displacement only one interval will be used Then this interval will be subdivided in several steps The objective is to gradually increase the load up to failure Very often before an analysis is started it is difficult to estimate the required loading level that would lead to failure The maximal load level however can be often estimated either by simple hand calculation
108. rection over the beam thickness 0 32 m Selection of entity types which should result from the extrusion operation In this case the surface will be extruded into a volume so the item Volumes should be selected Definition of a numbers of copied entities in this case it is only 1 copy By pressing Select button the entities which should be extruded can be selected in the graphical area Parameter input Entities type Surfaces Transformation Translation First point x 0 0 y 0 0 z 0 0 Second point x 0 0 y 0 0 z 0 32 Do extrude Volumes The selection of the surface can be done by a direct clicking on the pink line which defines a surface Another option is to select the surface by holding the right mouse button and by moving of the mouse The box should cross at least one line of the surface to be selected After the proper selection the pink selected surface will change to the red colour GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static o G Files View Geometry Utilities Data Mesh Calculate ATENA Help 6d 5 B BF lt 4 ayn S z The pink rectangle changes t the red colour after the correct selection ntities type Surfaces sformation Translation First point Mum x 10 0 y 0 0 z 100 Second point Mum x 0 0 y 0 0 Duplicate entities Do extrude Volumes Create contacts Maintain layers The button Finish has to be Multiple copies 1 selected to complete the
109. rical ModE lirira coccsesscasesssuceaencacuesdacace ssecoasuasnabceseebecasuesseccusesesbes sos decseascecasavencadasess 9 S 29 OAE BE AA ere nrc nT O E O O O oe em ne eT 10 3 2 2 Loading and Supporting Steel Plates ecsesessssssssssssssssssssssssssssssssssesssssesesesesesesesesesesessseseseseseeeeeeeeess 16 3235 Reinforcement BATS ensani ceisssnsecxBesesovbacnvadeasebtnvadicucedsusisesbincuasdedesbiadiisasa E G 29 32A WAV CUS POS RY OPPO S R a N a a ENNS 32 3 3 Material Parameters vecisevciccesevecsscnscuesevacctuccsdecsesenccasdateacecuenscstusssddecevencassianseneassnseeensedsunmaedcscceseonse 41 33 1 Condette ol AA PR O R P toetaeestes enna 41 3 3 2 Loading and Supporting Steel Plates sa erissa e R EA E O 50 335 3 RENTO ement BaTS zutsiutisasdoiidac dak ba d kodoa ate do besd ds b Mesaovackasiaadaaensictousies 54 3 4 Boundary Conditions 55cssccsietacsvaccvsasasnwesausseusdoasscseoascnescannausadsonevcssesastecesaccntuunssasssuedessesncsessunsenacuoens 60 3A OO KAPRA KAVE ONO OPOP V O Gdansk ets eae 61 2342 Displacement auasi ae N ie tnt a ka ola ko noes 67 34A Sy mMMETY CONA ON RA O O O tesa E OE 77 SAA MONRO oea N 80 3 5 Intervals Loading HISTOFY seiecesscsssssscssasacncsacnesecscosssusssicasnanansdesesesadsseveccdendsssesdansdesenesesesecccecdacsenne 87 3 6 Mesn Generatioli lt csdsdszsa du d 0 ad zadsa sad sd sad Sala tasasaevusovala sos SE4S Sad SVS 80 sna Za d d load usa d e a n 90 265 NOES OR MESNIN dea besedu da
110. s HE wy Z 2 P n434 e313 r Normalt No Units m Gp CB No Graphs Default Analysis Step gt Smooth Contour Fill DISPLACEMENTS COD2 Contour Lines STRAIN b COD3 Contour Ranges STRESS b JCRACK WIDTH Show Min Max Display Vectors Iso Surfaces Stream Lines Node trace Graphs Result Surface Deformation Line Diagram Integrate COD1 0 0008733 0 00077627 0 00067923 0 0005822 0 00048517 0 00038813 0 0002911 0 00019407 g The message window shows maximum 9 7033e 05 and minimum crack width 0 Pick LEFTMOUSE to despld e view ESC to quit A x 0 48364 Contour Fill COD1 Min 0 Max 0 0008733 E y 1 3932 Command BR z0 Figure 171 The display of the crack width In the command Contour Fill the pull down menu offers options which can be displayed Currently rather limited set of quantities 1s available however much more result types are available in ATENA Studio To be able to visualize these additional quantities the program has to be switched to pre processing It is done by selecting icon gt Toggle between pre and postprocess see Figure 172 After that a dialog window appears and the button OK should be pressed The program switches into pre processing Then the command Data Problem Data Post Data can be selected in the main menu and a window for the definition of the post data will appear see Figure 173 This dialog you can run directly by clicking to icon
111. s panel To update structure according to selected result press the button Apply see Figure 158 ATENA Science GiD Tutorial 123 ShearBeam3D Atena Studio ile Edit View Project Output Window Help ea ete X SOP SBP HRHAEEL Convergence diagram Postprocessor 4 esar View style Light Q on Convergence diagram Crack Width B Criter 1 i Criter 3 Codl BE Criter 2 B Criter 4 m 00015431 N 00013269 00011107 1 000059456 000067838 00004622 000024602 29846e 005 0 00018633 x Y z 0 20 40 Convergence criteria Time 44 0000 Step Iteration ATENA X Monitoring points g State Iterations Name Value Units 0 000583759945941265 Analysed Analysed Analysed Analysed ConvergenceMonitor Criter 1 ConvergenceMonitor Criter 2 ConvergenceMonitor Criter 3 ConvergenceMonitor Criter 4 0 0401615051921171 0 0393912407379185 2 34446780998702E 05 Loadl142 REACTIONS 000010 DOF 3 0 0351642299305761 MN Deflection1392 DISPLACEMENTS 000010 X 3 0 00362271475176417 m of load in interval LC coeffs v Output Message Error Monitoring points Figure 158 The crack width shown in the geometry window Analysed Analysed Analysing ra For better view the model can be rotated To activate rotation click on icon k Or press and hold the Shift key and move the mouse with left button pressed see Figure 159 fa ShearBeam3D
112. ster conditions on beam top and bottom and two slave conditions on plates top and bottom 106 The conditions should be applied on the geometrical model and not on the mesh itself otherwise it would be lost during next mesh generation Therefore if the mesh is displayed in the graphical area of the program the icon gt should be selected to switch between the mesh view and geometry view This can be alternatively also accomplished by selecting the command Geometry View geometry in the main menu 4 1 1 Master Top Beam Condition Conditions command can be executed by the selection of the icon FA or by the selecting the command Data Conditions in the main menu The contact condition definition for master top beam is depicted in the Figure 141 Seon The contact condition is applied on the aN aj surface therefore this icon should be selected Fixed Contact for Surface lt By the clicking on the arrow the available Type of Cond Master conditions will appear The option Fixed Contact for Surface has to be selected ContactName Topl You can hawe multiple Master Slave connections identified by different names Only p For the beam the Master Should be selected Master and Slave conditions of the same name are connected sic ani The Contact Name can be Ton Do not connect selected DoFs By this button this condition can be assigned to the geometry see Figure 142 Assign Entities Draw Unassign Use current coord
113. support condition should be applied to the line This line has to be added into the bottom plate geometry It will be done by dividing the bottom plate surface The steel plates are assigned into the plate layer Therefore the plate layer should be activated and displayed The bar layer can be hidden but the beam layer is better to keep displayed to be able recognize the bottom surface It is also recommended to zoom at the bottom plate Make sure that the zoomed surface is the bottom surface of the bottom plate see Figure 81 and Figure 82 80 GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static gt El m Files View Geometry Utilities Data Mesh Calculate ATENA Help Celibe pl BA amp bem Z H gp i Layers Double click here to integrate the window ELIGE NI Mame e C VO WU Ir B u beam w A 6 plates oc GB This surface will be divided Figure 81 The bottom surface of the bottom plate The division of the surface starts with the execution of the command from main menu Geometry Edit Divide Surfaces Num Divisions or by selecting of the Divide surface icon A see Figure 82 ATENA Science GiD Tutorial 61 Go GiD Atena 5tatic 2D and 3D Interface Project UNNAMED Atena Static E j Files View Geometry Utilities Data Mesh Calculate ATENA Help Og A een pate beam wv D p cp a jeme Double cl
114. tena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help 6823186271 8519 0 bw S13 4 Entities type Lines Y Transformation Translation First point Nurmi x 0 0 y 0 0 z 0 0 Second point Num x 0 100 y 0 0 B Duplicate entities Do extrude Mo Create contacts Maintain layers Multiple copies 1 Selected 1 Lines Geometry has 1 new lines 2 new points Leaving Command Figure 22 The repeated copy operation to create the second line The next step is to connect these newly copied lines into a rectangle This can be done by creation of new lines using the command Geometry Create Straight line from the main menu or by clicking the icon N Also the Join function should be used Ctrl a see chapter 3 2 1 The connection of lines is depicted in the Figure 23 and the Figure 24 22 80 GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static El eee Files View Geometry Utilities Data Mesh Calculate ATENA Help OBA SG 218518 amp ba S13 M First this point should be selected Make sure that the command Join Ctrl a is activated otherwise a new point may be created L 7 L lt Then move the mouse and select the next line point Enter points to define line ESC to leave a Pick an existing point y O 47024 Command Ba z 0 BD GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static E mm Files View Geom
115. tic 2D and 3D Interface Project 3D Beam Atena Static Files View Geometry Utilities Data Mesh Calculate ATENA Help 312682718510 ben S13 M After that a new mesh can be generated It is done by command Mesh Generate mesh or it can be activated directly by pressing the key Ctrl and g at the same time Number of elements is default As can be seen on Figure 134 the number of linear elements is only 2 Dialog window Jum of linear elernents um of Tetrahedra elernents 1 1 um of Hexahedra elernents 160 ly bere of nodes 477 Figure 134 The dialog window ATENA Science GiD Tutorial 101 A ca lt P w M te e 4 I LH SEK POR AN B vy K T O M R E a POP A Tra TN mE EHHG PH Hi MEN TA hs AY Bee TN H ice io r yd it ol fn oy jl LL L C T I n PIK PZ TRA T PR NE B 4 M ig E bs BGS Gp ay ey T E SA N is RY orn KRK TREK EIS i P KTE A RT Af POSES ERE TART S 4 9 ha E i u i M a Help T ig E ine i E v ATENA Project 3D Beam Atena Static Project 3D Beam Atena Static Calculate Reflection Define reflection Change light dir Customize Mesh Calculate ATENA Hel Mesh P E RE E R ART Pups fo TT I i PK AT PTT un LL i I KE PRE RET PRO RLH i 1 PA HE M l REPRE KT Tee ee RO DRAPER SL AR AY in Data Utilities Data OSBsaloewed 6n
116. to desplace view ESC to quit if present mouse wheel zooms Pick LEFTMOUSE to desplace view ESC to quit Command Figure 175 The displayed FRACTURE STRAIN More post processing capabilities can be found in the Help of the GiD or in the GiD manual 5 134 5 2 ATENA Studio Post processing Results can be post processed also in ATENA Studio The L D diagram and Crack width which have been explained in the chapter 4 section 4 3 and 4 4 are the few of the many possibilities of post processing in ATENA For post processing in ATENA Studio it is important to know how to open results First of all ATENA Studio should be started from the Start menu on your computer Then create new project from result files see Figure 176 Atena Studio File Edit View Project Output Window Help LR of oi B Create new project from input file A Create new project from result files E Open existing project Recent projects Create new project from result files a Open existing project w Recent projects Figure 176 Starting of the ATENA Studio project The step data file name should be 3DBeam 0xx where 3DBeam is the task name as it was defined in GiD in Section 3 1 1 2 The suffix Oxx represents the load step number which should be post processed In this case for example the 25 step can be chosen see Figure 177 Then the project properties are displayed see Figure 178 Click OK button and th
117. tured and limited to 300 elements The finite element size should be 5 elements over the beam height 2 elements over the beam width and 16 elements over the beam length It should be noted that such a mesh is not an optimal one for this problem type but our mesh size is limited by the capacity of the demo version of the program In real structural problems finer meshes should be used The structured mesh is done by command Mesh Structured Volumes Assign number of cells in the main menu Gp GiD Atena Static 2D and 3D Interface Project 3D Beam Atena Static y ea Files View Utilities Data Mesh Mesh Calculate ATENA Help E5 T v x o ed om 22 lie L de o 2 M GiD CB ie Lines SemiStructured lt T Surfaces Cartesian i ii Volumes sign r Boundary layer ign SIZE Quadratic type Element type Mesh criteria k Reset mesh data Draw 2 Generate mesh Ctri g Erase mesh Edit mesh View mesh boundary Create boundary mesh Mesh quality Mesh options from model Figure 119 The Structured mesh command Once this command is executed the volume which should be structured has to be selected see Figure 120 After the selection the program asks for the number of cells which should be assigned to the lines see Figure 121 ATENA Science GiD Tutorial 93 S GiD Atena Static 2D and 3D Interface Project 3D Beam Atena Static Files Vi
118. ults can be achieved by decreasing the finite element size to for instance 8 elements over the beam height 4 elements over the beam width and 25 elements over the beam length The objective of this tutorial is to provide the user with basic understanding of the program behaviour and usage For more information the user should consult the user s manual 2 or contact the program distributor or developer Our team is ready to answer your questions and help you to resolve your problems The theoretical derivations and formulations that are used in the program are described in the theory manual 1 The experienced users can also find useful information in the manual for the analysis module only 4 138 ATENA Science GiD Tutorial 139 7 PROGRAM DISTRIBUTORS AND DEVELOPERS Program developer ervenka Consulting s r o Na Hrebenkach 55 150 00 Prague 5 Czech Republic phone 420 220 610 018 fax 420 220 612 227 www cervenka cz email cervenka cervenka cz The current list of our distributors can be found on our websites http www cervenka cz company distributors 140 8 LITERATURE 1 2 3 ATENA Program Documentation Part 1 ATENA Theory Manual CERVENKA CONSULTING 2009 ATENA Program Documentation Part 8 User s Manual for ATENA GiD Interface CERVENKA CONSULTING 2009 ATENA Program Documentation Part 3 ATENA Examples of Application CERVENKA CONSULTING 2005 ATENA Program Documentation Part 6
119. will appear in the list of the layers 1 The icon Create a new layer should be pressed 2 For simplicity the name of layer can be changed for example beam Figure 37 The Layers command The newly created beam layer is immediately activated The layer activity is indicated by the sign The next step is to assign the beam geometry to the beam layer by pressing the icon amp Then the pull down menu will open see Figure 38 The beam geometry contains three types of entities and all of them should be assigned to the beam layer Therefore the item Also lower entities has to be activated and the command Volumes should be chosen After selecting the Volumes in the pull down menu the geometry which should be send to the beam layer can be selected see Figure 39 The pressing of the Finish button will complete this command 32 GD GiD Atena Static 2D and 30 Interface Project UNNAMED Atena Static 2 zs Files View Geometry Utilities Data Mesh Calculate ATENA Help OB 8B SoSed Bal amp bem S M 1 After pressing the icon Send the selected entities to E le ck here to integrate the window a layer the pull down menu Keaeey will appear e W v Also lower entities Points Lines Surfaces X ba g y D M i ii JA Dimensions All Se 2 entities has to be active 3 Then the Volumes should be selected Created new layer Layerl Using this renamed layer Layerl to beam
120. will be created by copying of the first bar The copy starts by the command Utilities Copy in the main menu The definition of the translation is depicted in the Figure 34 After the definition of all parameters the Select button should be pressed Then the line required for the translation can be selected in the graphical area see Figure 35 After the selection of line it is necessary to press Finish button to complete the translation see Figure 36 Entities type Lines v e TEWE M Parameter input First point Entities type Lines T Transformation Translation u z 00 First point x 0 0 Second point y 0 0 T z 0 0 Second point x 0 0 E y 0 09 Duplicate entities 7 0 0 Do extrude No Do extrude No Create contacts W Maintain layers Multiple copies 1 Select Cancel Figure 34 The parameter definition for the copying of the first bar 30 Gd GiD Atena Static 2D and 3D Interface Project UNNAMED Atena Static j Files View Geometry Utilities Data Mesh Calculate ATENA Help O8 BI SG8F1 B51 BB be S18 Ji Entities type Lines Transformation Translation v First point Num x 0 0 y 0 0 gt z 0 0 Second point Num x 0 0 y 0 09 z 0 0 Duplicate entities Do extrude No Create contacts Maintain layers Multiple copies 1 The button Finish has to be a Removed 1 new linesfromt Selected to complete translation im new lines to the selg y 0 42893 C

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