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Thanks for the help vesna, I think the problem might have been that I was using rigidLink elements in series. I modified my original model and replaced all the rigidLinks with really stiff elastic beam columns and this allowed the analysis to run. Therefore, it wasn't a stability or connectivity pro...

Update: I have experimented with adding intentional hanging nodes and elements and this causes my analysis to fail during the static stage - therefore I don't think I'm problem is related to stability of to erroneous connections. I have displayed my building thoroughly as well and it looks OK. Could...

It is surprising to me that the static analysis and modal analyses work but then the dynamic analysis fails instantly. What could be the reason for this scenario? Can this knowledge be used to narrow down the potential source of the failure? Could it be element compatibility? I use truss, dispBeamCo...

I am having this same problem, and I also am able to run a static analysis but not a dynamic analysis. I was wondering if this knowledge could help narrow down the potential source of the problem. ie material properties, support conditions, hanging nodes, connectivity, element compatibility... Thank...

Hello, thanks for any help anyone can provide in advance, I am sure that other people have experienced this same problem, and I have scoured the community forums for a solution that works for me, however I have not come across anything, so here is my issue: I have built a 3D model with 6 DOF. The mo...

Hello all, I am looking for the equivalent function in the tcl language to "num2str" in MATLAB. In other words, I would like to return an integer stored in a variable and use it as part of another variable's name to call many sequentially named variables in a loop I don't know if it exists...

Thank you so much! Its working great!
Michael

Sorry, I have found the solution in another thread:

http://opensees.berkeley.edu/community/ ... php?t=8352

Bringing to top

Hello Everyone, thanks for reading and helping if you can, I am modelling cantilevered concrete shear walls with a fiber section and dispbeamColumn element in the plastic hinge zone, and elastic beam columns for the higher storeys. The dispBeamColumn element has four integration sections along its l...

Hello everyone, I have a script which is doing a dynamic analysis of a simple sdof system. I am using the rayleigh command in the script as follows: set alphaM 0.0; set betaK 0.0; set betaKinit [expr 2*0.05/$w]; set betaKcomm 0.0; rayleigh $alphaM $betaK $betaKinit $betaKcomm; The script was origina...

Anyone with any suggestions?

The SelfCentering material can do exactly what I want with one exception. I need to be able to model different strengths in the positive and negative directions and as far as I know this is not possible with the SelfCentering material. Thanks for the help though, do you have any more suggestions?

Hello All, I am trying to model a material with the Pinching4 uniaxial material model. I need to model a material which is elastic-perfectly plastic and loads and unloads directly along the backbone curve during cyclic loading . I also need to make it so that the material is stronger in one directio...