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Thank you.

I was using an older version of OpenSees (gave displacements but not forces). I downloaded the newer version and can record forces using "forces" now. But this time I can`t record displacements. I have tried both below: Option 1) recorder Node d3.txt disp -node 3 -dof 1 Option 2) recorder ...

I have a model consisting of two truss members. Applying lateral static point load. Recorder for member forces work if truss members are assigned elastic material properties but not if members are assigned inelastic properties: p.s. no problem with displacement recorders in either model #___________...

Thank you, this has solved the problem.

The mass addition did not change anything. The models are the same. Such a simple and elastic model probably is not handled differently between programs. I was able to verify my result (lateral deflection) from SAP with hand calculations. But getting something different from the OpenSees model. Obvi...

Getting higher flexibility (larger period and larger lateral deflection under unit lateral load) from a model in OpenSees in comparison to same one developed in SAP and result of hand calculations. The model is relatively simple: 2-dimensional steel frame, 1 story, 1 bay, with chevron bracing. All m...

Getting a singular matrix error with the following. Any help appreciated. Happy holidays. p.s. making it -ndf 2 does not work either ________________________________________________________ model BasicBuilder -ndm 2 -ndf 3 node 1 0 0 node 2 360 0 node 3 180 156 fix 1 1 1 0 fix 2 1 1 0 geomTransf Lin...

Thank you, I appreciate it. It turns out the problem was rigid body motion.

Getting the following error: In SymSparseLinSolver: error in factorization. WARNING NewtonRaphson::solveCurrentStep() -the LinearSysOfEqn failed in solve() StaticAnalysis::analyze() - the Algorithm failed at iteration: 0 with domain at load factor 0.1 OpenSees > analyze failed, returned: -3 error fl...

Got it! Thanks.

This might sound kind of strange but had to ask... Wasn`t there an elastomeric isolation bearing material or something of similar nature under the contributed materials at some point? Or is my memory failing me? Thanks.

Trying to display the mode shape of a model. Used: set nEigen 1 display -$nEigen 0 $dAmp; # display mode shape for mode $nEigen However, I am getting: invalid command name "display" while executing "display -$nEigen 0 2" any help is appreciated. Thanks. p.s. is $dAmp supposed to ...

I figured out the problem. It was related to the C++ code of a new zero-length I added into OpenSees. For further details, see the framewrok forum:

http://opensees.berkeley.edu/community/ ... 7304eeba8c

I had the following problem and posted it to the users forum because I thaught it had something to do with the Tcl code of the way I was running the sequence of my earthquakes: Running a sequence of earthquakes consecutively and recording some data. Got the following error message after the third ea...

Running a sequence of earthquakes consecutively and recording some data. Got the following error message after the third earthquake: WARNING BandGenLinSOE::BandGenLinSOE : ran out of memory for A (size,super,sub) (1110, 905, 905) I know it should be possible to analyze many earthquakes consecutively...