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Hi everybody, I would like to model in OpenSees a non-symmetric cross-section, i.e the positive and negative bending moments are different. I already know the bending moment vs curvature diagrams and I can can discretize them in trilinear curves. How can I assign a uniaxialMaterial to the cross-sect...

Hi gerber, I already modeled the frame with Beam With Hinges Elements and it worked. But I would like to try another kind of modeling where the flexural behavior of elements is not influenced by the changing in the axial force loading the elements during the analysis. So I tried the zero length elem...

Dear Vesna, I try to explain the problem better. I modeled a three story concrete frame by using elasticBeamColumn elements for beams and columns. Then I used zeroLength elements in order to model the non linear behavior of the plastic hinges that can develop at the top/bottoms of the columns and at...

Hi all, I'm trying to model a concrete multistory frame by using zero length elements for the plastic hinges at the ends of both columns and beams. I don't know if this is correct since the structure apparently has some lability (neither the eigen value analysis is performed correctly). Is this beca...

Hi all,

I'm new in using OpenSees and I would like to know where I can find the most updated version of the user manual in pdf format (since I find it more readable than the wiki version...)

Thanks in advance!