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Hello Song,

Did you solve this problem? If so, would you please post here? I have the same problem.

thanks,
Hassan

Thank you fmk, I used FullGeneral system, it is working.
I see that at the case of transient analysis, the result of printA will be some combination of mass and stiffness matrices. What is the coefficients?

Thank you Gor. I tried to use printA, but does not work.

Hello,

Is there any way to extract initial stiffness matrix and mass matrix of a structure in OpenSees?
Also, if it is possible to have tangent stiffness matrix of the structure in each time step of a transient analysis?

Thanks,
Hassan

Dear fmk,

I need to look at some of *.tex files. I use LaTex to compile them, but I face with a problem. Would you please put a sample folder involving required packages?

Sorry, that is a mistake here, actually I apply both of them with a negative sign. while {$t<=$TmaxAnalysis} { set ok [analyze 1 $DtAnalysis] set disp1 [nodeDisp 3 1] set disp3 [nodeDisp 3 3] #### here I sent the displacement to the server remove loadPattern $j; # I remove the load pattern on the gi...

I’m going to do a hybrid test with a substructure using OpenSees and LabView (National Instruments). I have a problem in OpenSees and I wonder if you help me. In my process, OpenSees is in the client side and LabView acts as server. In OpenSees I’m using a loop to do transient analysis and apply rec...

Hi Omaramin, I see some problems in your script: 1- Why you've used -ndm 1 -ndf 1? (I think you should use -ndm 2 -ndf 3) 2- Why you use zero length elements? A zero length element should has real zero length! but here point you have a distance between successive points (120). If you are beginner, I...