The OpenSees Community

It's been a while since I've used OpenSees but I believe that the section Aggregator command is only used to assign materials to your section. In your case, you haven't defined the section yet. So before you assign materials via section Aggregator command you need to define the section itself. I wou...

I have a PDF document you might be interested in.

I think you are right, it only works for 2-D elements. From OpenSees wiki: The MVLEM element command is used to generate a two-dimensional Multiple-Vertical-Line-Element-Model (MVLEM; Vulcano et al., 1988; Orakcal et al., 2004, Kolozvari et al., 2015) for simulation of flexure-dominated RC wall beha...

Dear all, I am modeling gusset plate at the end of steel diagonal bracing with Elastic Beam-Column and zeroLength springs. Columns and Braces are using corotational geometric transformation but assuming I want to transfer the full load from the braces to the columns do you have any suggestion on wha...

I found the easiest way for me was to create a text file from Matlab and then call OpenSees.exe from Matlab using !OpenSees.exe and source the text file generated by Matlab from my main tcl script. This can be included into a for loop in Matlab to run multiple analysis.

Dear all, I built a steel SCBF model to study buckling and post-buckling response of columns. I coded the analysis part in such a way that if the analysis fails to converge, the displacement increment (pushover analysis) or the timestep (time history analysis) will be reduced. My question is, someti...

Thank you very much Mr. McKenna.

Dear all, Are you aware of any limitations on the number of recorders that we can have for a dynamic analysis? I am trying to record stressStrain on a cross-section at 126 points for 3 different locations along a column. With all the other recorders I have it's a total of around 800 separate output ...

Hi, I don't know if this issue has been already reported but I am getting this error message when I switch from OpenSees 2.4.5. to OpenSees 2.4.6. when I display the structure using display recorder Truss::displaySelf() (element number...) Also, when the structure is displayed using OpenSees 2.4.6. ...

I was able to call OpenSees.exe from VBA but I couldn't send him commands e.g. source filename.tcl What I ended up doing is making a VBA macro to execute a matlab script (.m file). In that script, I perform an OpenSees analysis using "!OpenSees.exe filename.tcl". Note that this matlab scri...

Dear smailk,

The only way I could think of is to do a recorder Display and then get a print screen of the mode shape.

You could record the nodal eigenvectors using a Node recorder.

Dear fmk, When I remove the option that makes the analysis go on after failed test I got the follow error message: WARNING: CTestNormUnbalance::test() - failed to converge after: 10 iterations NewtonLineSearch::solveCurrentStep() -the ConvergenceTest object failed in test() StaticAnalysis::analyze()...

Dear all, I made a 3 stories CBF model in OpenSees. Beams are elastic but columns and braces are nonlinear (forceBeamColumn). My problem is when I run pushover analysis, braces on third floor are buckling and then when the braces on the second want to buckle I'm starting to see this error message: W...