The OpenSees Community

Dear All, I have modeled a 2D SCBF based on Vesna Terzic model. When running the 1 story frame it runs correctly, but when I modify it to a 3-story frame, then the pushover analysis does not converge after lateral displacement of about 2cm. If I change the brace material to elastic, there is no conv...

Dear Sir, Please note that in the "beam with Hinges" script given in the link you sent, the plastic hinge stiffness "ks_col" or "ks_beam", is not correct. The stiffness is now: Ks_col=6*E*I_col/Lp_col but shall change to Ks_col=6*E*I_col/L*Lp_col. using forceBeamColumn/HingeRadau and the corrected K...

no there is no special reason, i just want to know the difference! As far as I know, with fiber section only moment and axial loads are considered and using a section aggregator I can also consider the shear in beams. I do not know why it is ignored in most of the example models?! How can I define t...

In the above model I have not used section aggregator for beams, if I do so I will have convergency problems with the pushover analysis, and brace forces will not be correctly predicted.
In section aggregator I just add elastic shear to the fiber section.
Why this happens?

Hello I want to do a pushover analysis for a three storey chevron braced frame. The analysis converges well, but in the base shear-control node displacement curve obtained from the analysis, the base shear keeps increasing through all displacements. while I think this is not correct. I think that it...