Release Notes USFOS 8
Contents
1. 13 3 7 SOIL DAMAGE CYCLIC DEGRADATION 14 3 8 USER DEFINED SOIL DAMPING 15 3 9 SURFACE LOAD ON PIPE SECTIONS 16 3 10 JOINT OPTIONS 17 3 10 1 Short Can Reduction 17 3 10 2 Repair eccentricities 18 3 10 3 Local Shell model SubShell 19 3 10 4 Element degradation damage 20 3 11 BEAMHING gt LINEAR BEARING 21 3 12 SWITCHES SPECIAL OPTIONS 22 3 13 UPDATES USFOS AND UTILITY TOOLS 24 3 14 NEW MODIFIED INPUT COMMANDS2. 24 3 15 DOCUMENTATION 24 3 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 1 Introduction The current official version of USFOS is version 8 8 with release date 2015 09 01 The release contains the following Release Notes this MEMO Updated software www usfos com Extended examples library www usfos com Updated manuals www usfos com Except for this MEMO no written information will be distributed in connection with this release All information is stored on the WEB 2 Changes in version 8 8 Comparison of 8 8 vs older USFOS versions could give somewhat different results due to o Mix of hinges and eccentricities Hinges are removed if conflict see also Hin2Elem o Different T Z capacities in tension and compression are accounted for 4 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 News in USFOS version 8 8 2015 3 1 Introduction Some of the new features are described by examples in this memo in the examples collection on the web and in the updated manuals USFOS 8 8 is built on the usual platforms Win32 Win64 LINUX and MacOSX The utility software is available on all platforms 3 2 How to install upgrade your USFOS version 3 2 1 Windows 64bit USFOS could be upgraded in different ways as usual
3. KeyWord ID Type Z Fac PileOpt SoilDamp 100 P Y 0 1E4 100 1 1E4 100 2 1E4 100 80 1E4 100 KeyWord ID Type Z Fac PileOpt SoilDamp 100 T Z 0 1E4 100 1 1E4 100 2 1E4 100 80 1E4 100 KeyWord ID Type PileID PileOpt SoilDamp 100 Assign 1001 16 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 9 Surface Load on Pipe Sections A conventional NODELOAD is applied on the Node If the user wants to account for the denting of the tube wall the new SurfImp load could be used In the example element 1 which goes from node 1 to 2 gets a surface impact load of 1MN in X direction at mid span end 3 The extent of the impact zone is 0 1m Figure 3 14 Modified model Extra elements are inserted automatically A special attach option makes it possible to create surface impact between different structures This example is found on the web under basic loads Key LCase Type ElemID End Extent Fx Fy Fz SurfImp LoadCase 3 Elem 1 3 0 1 1E6 0 0 Original Element goes from node 1 to node 2 Element is split into two since load attacks in the middle end 3 Special springs are inserted between the load and the beam centre 17 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 10 Joint Options 3 10 1 Short Can Reduction If the can is shorter than a certain length the strength of the can is reduced The user may either use the automatic o
4. o Alt 1 Download the new setup exe and u install install USFOS same as for release 8 7 This operation requires administrator rights on the PC o Alt 2 Download module by module and copy into the application folder typical C Program Files USFOS bin This operation requires write access on C but no administrator rights are required since this is just file copy Alternative 1 updates all modules and the on line manuals Alternative 2 requires following download and operations USFOS 64bit module unzip and copy into C Program Files USFOS bin xact complete 64bit package unzip and copy into C Program Files USFOS bin USFOS manual Copy into C Program Files USFOS bin Similar procedure is used for other modules for example STRUMAN FAHTS 3 2 2 Windows 32bit No set up script is made for USFOS 8 8 32bit windows However version 8 8 becomes available by downloading the central modules similar to Alternative 2 above o USFOS 32bit module unzip and copy into C Program Files USFOS bin o xact 32bit complete package unzip and copy into C Program Files USFOS bin o USFOS manual Copy into C Program Files USFOS bin 5 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 2 3 LINUX Updated versions of USFOS xact and utility tools are downloaded module by module as usual 3 2 4 MAC OSX Updated versions of USFOS and utility tools are downloaded module by module as usual 6 24 Release No
5. This example is found on the web under foundation Opt Pile Ztop ZBotm Geometry PileGeo ChgCross 9100 0 3 2001 Use geo 2001 from 0 to 3 3 6 2002 Use geo 2002 from 3 to 6 6 10 2003 Use geo 2003 from 6 to 10 Pipe 2001 0 150 0 050 Pipe 2002 0 150 0 040 Pipe 2003 0 150 0 030 Pile_id Nodex1 Nodex2 Soil_id Pile_mat Pile_geo Lcoor Imper PILE 9100 2 3 762 1000 762032 0 13 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 6 Lumped Soil If the resultant properties of the foundation are known a lumped soil model could be used The element is a 1 node spring to ground with non linear properties using MREF amp ElPlCurve The soil curves are defined as follows o DOF 1 P Y curve o DOF 2 P Y curve same curve as for DOF 1 o DOF 2 T Z curve The command SpriType Lumpsoil is used to change the 1 node spring to a special lump soil element Figure 3 10 Pipe supported by a Lump Soil element This example is found on the web under foundation SpriType LumpSoil Elem 1001 ID Node Mat Sprng2Gr 1001 1 1000 1 2 3 rX rY rZ P Y P Y T Z MREF 1000 1001 1001 1003 0 0 0 MatID P d ElPlCurve 1001 1001 1 050 1000 0 050 900 0 010 900 0 010 1000 0 050 1001 1 010 MatID P d ElPlCurve 1003 200E3 1 000 100E3 0 010 100E3 0 010 200E3 1 000 14 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 7 Soil Damage cyclic degradati
6. of the capacity of I profiles with respect to strong and weak axis bending shear loading compression buckling and lateral torsional buckling The following colour convention is used to visualize the slenderness compactness o Yellow to Red gt 0 67 Slender section The cross sectional behaviour does not conform to the capacity formulations used by USFOS If slender I profiles are used in secondary or tertiary structural components the utilization of the cross section MUST be checked by means of the code checking module in USFOS o Yellow to Light Blue 0 67 0 33 Semi compact Failure may occur earlier than predicted by USFOS and the utilization should be checked by means of the code checking module in USFOS In order to ensure a high level of robustness such cross sections should preferably not be used for important main steel in compression o Light Blue to Dark Blue 0 33 0 0 Compact The cross sectional behaviour conforms to USFOS capacity formulations for all loading conditions The use of compact sections for primary load carrying members is recommended Figure 3 2 Global Verify Slenderness of I Non I Profiles become grey Slenderness indicated with colour 8 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 Resultant LTB Figure 3 3 Different Slenderness 9 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 3 4 Visualization of NonStru and Fracture elements
7. 2bit 4 3 2 3 LINUX 5 3 2 4 MAC OSX 5 3 3 ENHANCED GRAPHICAL USER INTERFACE 6 3 3 1 Updated Preferences NOTE Remembers Fringe Range 6 3 3 2 Visualization of D T ratio for Pipes 6 3 3 3 Verify Slenderness of I Profiles 7 3 3 4 Visualization of NonStru and Fracture elements 9 3 3 5 Visualization of Soil Strength 10 3 3 6 Visualization of Absolute Displacements 10 3 4 PILE MATERIAL 11 3 5 PILE CROSS SECTIONS 12 3 6 LUMPED SOIL
8. Accept doubly defined nodes with same coo OFF StatusPrint MaxElem val Max element in status print 10 Iterations RLF_Calc Activate Residual Load Factor method OFF Write FE_Model IDAdd Case stp Writes deformed FE model at given case stp OFF LinDepAlt Writes ZL springs for each BLINDP2 Off Solution FracRepeat MxRep Max fracture repeat 10 PlateEdge ON OFF Avoiding I girder to buckle about weak axis if the beam element is attached to a plate element OFF Impact UnLoFact Load factor during unloading after boat impact 0 02 StrainCalc InclDent ON OFF OFF not included ON included ON Algorithm Val 0 old 2 new incremental 2 Visualization ON OFF Including Gradients ON OFF ON Results ShellComp Val Number of shell results 5 Overturn Val Specify X Y Z for overturn moment calculation Estim WindData ReynDep ON OFF Switch to Reynolds number dependent Cd OFF EarthQuake Delay Val Delays earthquake with specified time 0 Stretch Val Stretches the motion history with specified value 1 23 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 KeyWord SubKey Value Description Default Joint ShortCan ON OFF Detect and account for short can effect OFF EccUpdate ON OFF Repair joint ecc to avoid short joint elements OFF EyeLift Val Location of joint surface node 1 0 is on leg surf 1 2 FE_Model Hing2Elm ON OFF Replace BEAMHING wit
9. Non structural elements are easier to identify when the Nonstru visible is selected Earlier the nonstru elements became blue if plastic interaction was selected Now these elements become grey Figure 3 4 Visualization of Plastic Utilization NonStru elements When an element fractures the element forces are removed sent into the end nodes and the element is visualized with grey when plastic interaction is selected Before Fracture of Diagonal After Fracture of Diagonal Figure 3 5 Fracture elements become grey Non Structural Elements are visualized with grey colour 10 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 3 5 Visualization of Soil Strength By default the sizes of the soil discs are based on the relative strength where the T Z capacity is weighted 100 and P Y is weighed 1 The user may change this default using the SWTCHES command as follows Default 1 to 100 50 50 100 to 1 Figure 3 6 Disc Size for three different weights between P Y and T Z 3 3 6 Visualization of Absolute Displacements Visualization of displacement ranges from lowest negative blue to highest positive red if NODE Displacement is selected If the user wants the largest deflection to become red the Abs Displacement will visualize the absolute value of the displacement as shown in the figure Figure 3 7 Visualization of Absolute Z displacement P Y T Z Switches Soil DiscVis
10. This memo contains project information and preliminary results as a basis for final report s USFOS AS accepts no responsibility of this memo and no part of it may be copied MEMO MEMO CONCERNS Release Notes USFOS Version 8 8 FOR YOUR ATTENTION COMMENTS ARE INVITED FOR YOUR INFORMATION AS AGREED DISTRIBUTION USFOS AS Phone 47 905 05 717 www USFOS com Enterprise No NO 986 827 374 MVA FILE CODE CLASSIFICATION Confidential REFERENCE NO Members of USFOS user group X PROJECT NO DATE PERSON RESPONSIBLE AUTHOR NUMBER OF PAGES 2015 11 01 Tore Holmas 24 Release Notes USFOS 8 8 Nov 2015 2 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 1 INTRODUCTION 3 2 CHANGES IN VERSION 8 8 3 3 NEWS IN USFOS VERSION 8 8 2015 4 3 1 INTRODUCTION 4 3 2 HOW TO INSTALL UPGRADE YOUR USFOS VERSION 4 3 2 1 Windows 64bit 4 3 2 2 Windows 3
11. es leg surface Default model Eccentricity is kept but special element becomes short New model Eccentricity is moved into chord axis Special element gets sufficient length and original brace flushes the chord surface Figure 3 19 T joint with joint model Default and new handling of offsets This example is found on the web under Joints Switches Joint EccUpd ON Automatic eccentricity Repair Original Offset goes to chord surface Updated Offset goes to chord centre 19 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 10 3 Local Shell model SubShell If the user wants to represent a beam with shells the new DumpFEM option will generate a shell model for the selected element The shell model contains the followings o Shell elements and properties derived from the original beam element o Transition from shell to beam axis o Original beam is set NonStru Such analyses have two steps 1 Generate the local shell model using the SubShell command 2 Include the generated shell model for example using the opt input file Users Model Generated shell model Assembled model Figure 3 20 Local Shell model ID KeyWord SUBSHELL 2 DumpFEM nLeng ncirc MESHPIPE 36 36 20 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 10 4 Element degradation damage The user may define different ways to degrade the strength of a beam ele
12. h ZL spring OFF Hing2Elm HingStf Specify Stf of fixed dofs Estim Hing2Elm ReleaseS Specify Stf of released dofs 0 0 Hing2Elm IDAdd Specify number to be added to generated IDs 77E6 Soil DiscVisual Val Specify PY and TZ relative weight factor for size 1 100 24 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 13 Updates Usfos and Utility Tools News corrections and updates are described on the web and it is recommended to check the following link http www usfos no news index html 3 14 New modified input commands Since last main release 8 7 following input identifiers are added extended DAMAGE New command Defines reduced capacity gradual fracture PILEMAT New command Defining different pile material along pile SPRITYPE New command LumpSoil SURFIMP New command Load attacking surface of a pipe DYNIMPCT Extended command Material Curve directly for ship JNTOPTION Extended command Short Can reduction PILEOPT Extended command Cyclic Degradation Soil Damping PILEGEO Extended command Change cross section type for pile SUBSHELL Extended command Dump of FE mesh SWITCHES Extended command See above 3 15 Documentation The following documentation updated or new is available on the web User s manual Updated document Examples New examples on the web
13. ment The Damage command has several options o After a certain load case static o According to a time history dynamic o As a function of accumulated plastic work normalized The example shows the input to the PlastWork option where two general material curves are used to define the degradation for E mod and Yield For Plastic work less than W1 no damage is applied and is kept constant for work gt W2 Figure 3 21 Degradation of Yield strength as a function of plastic work Type DamE DamY ListTyp Ids Damage PlastWork 101 102 Mat 1 MatID Type Curv W1 W2 Fac Material 101 General S_Curv 0 1 0 5 0 10 E Mod Material 102 General S_Curv 0 1 0 5 0 90 Yield 21 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 11 Beamhing gt Linear Bearing Beam hinges are by default handled using static condensing of the internal forces Alternatively the hinge could be represented by one extra bearing element and one extra node per beam end with hinge These extra nodes and elements are created automatically if the Switches command shown below is defined It is also possible to give the released degrees of freedom some elastic stiffness the release option The default is zero stiffness for the hinge degrees of freedom The fixed non hinged degrees of freedom are given a high stiffens derived from the actual beam element s stiffness but the user may specify this stiffness the HingStiff op
14. on With the new pile option CyclDegr the user may define cyclic degradation of the soil with individual degradation of P Y and T Z Factor 1 0 means the initial soil strength and linear interpolation is used for the degradation vs number of cycles The cycles are derived from the accumulated plastic work where one cycle is defined as shown in Figure 3 12 T Z degradation damage Accumulated plastic work Figure 3 11 Soil degradation as a function of accumulated plastic work Figure 3 12 Definition of work vs cycle This example is found on the web under foundation KeyWord ID Key nCyc Fac PileOpt CyclDegr 100 T Z 0 1 1 0 9 5 0 5 10 0 5 KeyWord ID Key nCyc Fac PileOpt CyclDegr 100 P Y 0 1 1 0 8 5 0 4 10 0 4 KeyWord ID Key PileID PileOpt CyclDegr 100 Assign 9100 Displacement Force The area under the curve represents the work for one cycle 15 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 8 User Defined Soil Damping The user may define dashpot dampers for the different soil layer as shown below T Z and P Y damping are defined to a certain ID in the example 100 and then assigned to the actual pile s Figure 3 13 User defined soil damping This example is found on the web under foundation Define Pile Options and Assign to Pile 1001
15. ption where USFOS derives the parameters from the FE model or speficy the parameters explicitly Figure 3 15 Automatic detection of Short Can Reduction parameters Figure 3 16 Manual definition of Short Can Reduction parameters Figure 3 17 Joint with Can Define Chord Geometries KeyWord Value ListType JointID JntOption CanLength 0 400 Joint 100 110 JntOption CanLength 0 200 Joint 90 60 KeyWord Value ListType JointID JntOption CanThick 0 010 Joint 100 110 JntOption CanThick 0 005 Joint 60 90 JntOption CanDiam 0 500 Joint 100 110 JntOption CanDiam 0 150 Joint 60 KeyWord Value ListType JointID BraceID JntOption CanLength 0 350 Connection 100 130 Switches Joint ShortCan ON Automatic ShortCan detection 18 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 10 2 Repair eccentricities If the FE model has defined eccentricities in an unfavourable way brace flushes the chord surface this has negative side effects on the special joint element which is inserted between the chord centre and the brace The new Switches Joint command EccUpd ON will update the eccentricities are shown in Figure 3 18 The special element will go to the chord surface where it meets the brace Figure 3 18 Original and updated eccentricity Users Model Brace Flush
16. tes USFOS version 8 8 USFOS AS 2015 11 01 3 3 Enhanced Graphical User Interface The graphical user interface xact has been enhanced since last year s release The GUI version released together with USFOS 8 8 is 3 0 for the Win 64bit version The functionality is the same on win32 and win64 but the win64 version has access to more memory and uses QT 4 library 3 3 1 Updated Preferences NOTE Remembers Fringe Range The Preferences options are updated with following important changes 1 Current Fringe Range is by default kept after opening a new RAF file if the keep setting on new files is ON This is useful if the user wants a certain min max range for all states The preferences dialogue has an option to switch off this setting 2 The viewpoint and zoom are kept 3 The plot size could be customized remembers last used size The size could be set manually for example width x height 500 x 300 3 3 2 Visualization of D T ratio for Pipes Diameter to thickness ratio is visualized for pipes All other sections become grey Figure 3 1 Visualization of D T ratio of pipes 7 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 3 3 Verify Slenderness of I Profiles USFOS has a function which shows graphically the slenderness i e the opposite of compactness of the I cross sections The function is based on the AISC Standard Specification for Structural Steel Buildings 3 and performs code checking
17. tion In the example one extra node and one extra element are inserted in both ends of beam element 1 The user may control the node and element IDs the IdAdd option By default the number 7700000 is added to the generated nodes and elements Figure 3 22 Original model left and modified right lt end 1 gt lt end 2 gt ElemID BeamHing 1 1 1 1 0 0 1 1 1 1 0 0 1 key1 Key2 opt Switches FE_Model Hing2Elm ON Switches FE_Model Hing2Elm HingStiff 1E9 Switches FE_Model Hing2Elm Release 1E3 Switches FE_Model Hing2Elm IdAdd 7700000 22 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 12 SWITCHES Special Options The command SWITCHES was introduced in 8 5 to switch on special options and is extended in version 8 8 Following Switches commands are available sub keys in bold are new KeyWord SubKey Value Description Default General IndefLimit Min Max imperfection in CINIDEF 0 05 1 Defaults Version ver 850 switch to version 8 5 defaults 870 WaveData TimeInc val Time between each hydrodyn calc Every NoDoppler Switches OFF Doppler effects ON NoStore Switches OFF storing of wave data for visualize ON TidalLevel Level Specify Tidal Level 0 Accuracy val Change accuracy 0 old accur 1 new accur 1 SeaDim X Y dim Specify size of sea surface used in xact 2 StreamOrd order Stream Function order 10 NodeData DoublyDef ON OFF ON
18. ual 50 50 P Y T Z Switches Soil DiscVisual 100 1 11 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 4 Pile material Different pile material along a pile is defined using the command PILEMAT as shown below Figure 3 8 Varying Yield stress along the pipe PileMat ALL instead of PileMat ID means that all piles get the actual material vs depth This example is found on the web under foundation Mat ID E mod Poiss Yield Density MISOIEP 1000 2 100E 11 0 3 300E6 7850 MISOIEP 1001 2 100E 11 0 3 600E6 7850 MISOIEP 1002 2 100E 11 0 3 500E6 7850 MISOIEP 1003 2 100E 11 0 3 400E6 7850 Pile_id Nodex1 Nodex2 Soil_id Pile_mat Pile_geo Lcoor Imper PILE 9100 2 3 762 1000 762032 0 Pile Ztop ZBotm Material PileMat 9100 0 3 1001 Use mat 1001 from 0 to 3 3 6 1002 Use mat 1002 from 3 to 6 6 10 1003 Use mat 1003 from 6 to 10 12 24 Release Notes USFOS version 8 8 USFOS AS 2015 11 01 3 5 Pile Cross Sections A pile is normally a pipe cross section and it has been possible to specify different diameter thick along the pile using the command Pile_D T A new option is available in version 8 8 where different pile cross sections not limited to pipe section along a pile is defined using the command PILEGEO ChgCross as shown below In this simple example only pipes are used but in principle other section types could be assigned Figure 3 9 Varying Pile Cross Section along the pipe
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