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Alright the problem was that I had opensees 2.2.2 not the last version. and it was giving problems with the bilin material.

I just downloaded the newest version and everything works.

Thank you for the code. I have also read the paper "Deterioration modeling of steel components in support of collapse prediction of steel moment frames under earthquake loading" Dimitrios G. Lignos, A.M ASCE, Helmut Krawinkler, M. ASCE. And it has helped me understanding more in deep some ...

I obtained the following code from this forum of a Bilin material. I have been playing with the different parameters in order to obtain the deteriorated red cycle that can bee seen in http://opensees.berkeley.edu/wiki/index.php/Bilin_Material But there is no way I get it. I tried changing the amplit...

Hi Vesna, I could make a dynamic analysis but my advisor told me that I need to do a static one. And I don't know why it doesn't work if I follow the things u said about defining a series History... my model is: # MODEL OF A ZERO ELEMENT LENGTH ELEMENT WITH AN INPUT OF DISPLACEMENTS FROM A TXT FILE ...

Dear all, It's been a while since I have been trying loading a txt file of DISPLACEMENT coordinates to my Opensees model. My file has 9012 points each of them with a time interval of 0.05 sec and I am doing a Static analysis. Whenever I run it I get this message: WARNING PlainHandler::handle() - non...

So I don't have to use pattern MultipleSupport?

This is my model. Oh thank you for the reference 8 I'll read it, it looks really helpful. Is it possible that one or two days ago you posted an example of zero element with triangular load and recording the deformed angle? Where did I go? I would like to run it and "play" with it to learn....

Hi, I want to model a zero lenght element element with Opensees using bilin material ( http://opensees.berkeley.edu/wiki/index.php/Bilin_Material ) And then I want to apply a reverse cycle such as: set L 1 set WCol 1; # we need to set up parameters that are particular to the model. set IDctrlNode 2;...

Oh I see. So what can I do to make it work? I am doing that because I have a set of data from a real experiment of a reverse cycle displacement control of a column. And I am trying to model its behavior with Opensees to obtain the characteristic parameters of the column, such as the stiffness, the e...

I am not quite sure about the difference with static analysis or the transient one. But when I was reading the Opensees manual for loading my txt file I have to use: pattern MultipleSupport $patternTag { groundMotion... imposedMotion... ... } And I am using a ground motion: groundMotion type? arg1? ...

Hi Vesna and thank you vor your answer. I don't understand why do I need a mass to make a transient analysis, could I make it static? I dont think so because if I want to load a txt file of displacement I am supposed to do it transient, is that right? Anyway I modified the file adding a mass in each...

Dear all, I am trying to load a txt file with displacements. The time interval is 0.05 sec. This would be an example of part of my txt (in total there is 9012 points): -5.89401E-05 0.00067319 0.000307125 0.000307125 0.001405319 -0.0015232 -0.000425005 0.001405319 0.00067319 -0.001157135 -5.89401E-05...

Thanks so much, but I am not very sure how to avoid it then.

Dear all, I am modeling with steel01, and I have noticed that depending on the value I give to the parameter b, I obtain two changes of slope in the graphic force-deflection instead of 1. That happens if b is bigger than 0.025 approximately. Can somebody explain me why? or if there is some problem w...

Thank you for the advice. I'll send him an email!