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Hello everyone! I am struggling to understand how "loadconst" works. For a static pushover analysis, it is clear to me that you need to set loadConst -time 0.0 after the application of the gravity loads in order to keep the gravity loads constant during the application of the lateral displacements. ...

This is not related to your question (I think), but I was just taking a look at your code and I noticed that you have both node 1 and 3 fully restrained if I am not mistaken. Your Zero Length Section element seems to be fully restrained, but only the shear deformations should be restrained. Am I rig...

What is the best way of modelling a reinforced concrete plate in OpenSees? I have tested many alternatives, but I am not satisfied with the results. The one that seems to be closer to the experimental results, consists of the following sequence of commands: nDMaterial PlaneStressUserMaterial .... nD...

Before running the dynamic analysis, I would suggest you to simply try an eigenvalue analysis before gravity loading and after gravity loading (if you are applying gravity loads). See if you find anything strange by comparing the results.

EricsonEncinaZ wrote: > I can run 3 models at the same time.... I'm able to run 3 models at the same time, and the remaining > core and RAM is used to keep using the computer. > Please note that what I am doing is not parallel computing (OpenSeesMP) it > is just running different instances of OpenSe...

I run multiple models at the same time because they finish in less time than it takes to run them one by one. I don't think I am getting my job done 4 times faster, but it is noticeably faster (never had time to actually measure though).

Thank you very much ismailqeshta for your reply and for the link. I read the discussion in researchgate.net, but it doesn't quite answer my question. I am not sure if I understand the terminology you are using. Let's say I have a 1 storey frame, a 3 storey frame, a 5 storey frame and a 7 storey fram...

Hello! First of all, I apologize if this is not the appropriate forum for my question, but I thought there was no better option. Secondly, I know that I am not benefiting from the full potential of OpenSees and I probably should immidiately start using "parallel processing". Here is the deal: I ran ...

Thank you very much for your reply. I added the equalDOF line and it works now.

Hello! I was wondering if I could use the PinchingLimitStateMaterial in a non-conventional way. Can I assign a PinchingLimitStateMaterial to a spring that is located nowhere near the element in which I am monitoring the drifts? For example: http://imgur.com/SW4cqtZ Here is a piece of code I was tryi...

Thanks a lot for sharing this.

I tried some options, but not all. What options would you suggest for this situation, for a time history analysis?

selimgunay wrote:
> You can use elastic-perfectly plastic material with a large enough initial
> stiffness


That's what I have been trying to do. However, I can't find a large enough initial stiffness for which both a) no numerical errors occur and b) the stiffness is large enough. Any ideas?

Hi everyone! I am trying to model a rotational spring that has a moment rotation curve as follows: first point: rotation=0, moment=0 second point: rotation=0, moment=M; (this is the tricky part) third point: rotation=x, moment = M. other points: (...not important). Does anyone know how to do this? I...