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Hi

Which shell elements Implemented in opensees considered geometric nonlinearies ?

Thanks

Hi dear frank in the middle of dynamic analysis (t=t0-dt) i remove domain load patterns and rivert it to start state . it has no displacement at t=t0 but at t>t0 it's displacement not equal to zero !!! why ? I use codes like this . . . if(t==t0-dt) { theDomain->removeLoadPattern(1); theDomain->rever...

[quote="AURELIO"]Help! I need to model a structural element that presents a multi-linear (as bi-linear or tri-linear...) behaviour: no hysteresis. I need to couple this material with an histeretic law in order to obtain something similar to "flag shaped" histeresys. (for prestres...

abbass jan az tarigh mail ba man dar tamas bash
msa_imeg at yahoo dot com

man daneshjooye karshenasi term akharam ferdowsi hastam khoshhal misham komaketun konam !

wipe; model BasicBuilder -ndm 2 -ndf 3 node 1 0 0 node 2 0 0 fix 1 1 1 1 fix 2 0 1 1 mass 2 5.0e3 0. 0. uniaxialMaterial Hardening 1 $Es $Fy $Hiso $Hkin element zeroLength 1 1 2 -mat 1 -dir 1 recorder Node -file node_disp.txt -time -node 2 -dof 1 disp set accelSeries "Series -dt 0.01 -filePath ...

[quote="yen"]Hi Frank,

Now I need to record the global stiffness matrix at every time step. Can you tell me which files need editing?

Thanks,
Yen[/quote]

I do this , I edit FullGenEigenSOE , FE_Element , DOF_Group Classes

I can upload My file if you want !

I solve it .

[url]http://opensees.berkeley.edu/OpenSees/c ... .0.exe.zip[/url]

Hi,
I add some codes and now I can get mass,init , tang , damping matrices of analytical model if these help you I can Upload my Opensees Here !

Thanks Frank

Hi Mehdi,
source file :
[url]http://opensees.berkeley.edu/OpenSees/c ... es2.0.0.zi[/url]p

Hi ,
Post script file !

Hi Frank ,

I need to calculate mass participation factor , I don't think Opensees has any command to do this !?

which Class and Variable store mass matrix , tangent matrix and damping matrix ?

thanks

Hi Reza !
I have this problem too
remove quickMain and work with opensees or openseesTk in vs2005 project space .

Hi
is pseudo time in displacement control analysis load factor or it's something else ?

thanks