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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 prestressed elements) Has so...

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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 BM68e...

[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