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I have changed the stiffness of the material ($ko) to fix the frequency to the range that I want. I should say that my model's first frequency is a little higher than normal (14 Hz) and to get the model nonlinear without changing gamma and beta I should have a huge factor on my input earthquake reco...

Hi, I have a simple 3DOF model. The first element is nonlinear Beam Column element with fiber section. I used BoucWen model for material nonlinearity, but to get a nonlinear model I should increase gamma and beta enormously; like Gamma=beta=1e11! Do you think it is acceptable to have such values for...

silvia wrote: > yes. you can use materials to define any > "force"-"deformation" responses, such as > moment-curvature, for example. > > i almost want to change the name to something else. So, Is it Possible to use the Pinching4 material model with fiber section? I mean Can we as...

Me too, I cant download

I have the same problem, I modeled a simple 7DOF system with BeamColumn elements. I restricted all DOFs except the DOF 1. I expected to have the stiffness matrix of a shear building and calculated the eigen frequencies. they are not what I get from opensees as modal frequencies. But when I model the...

I have a problem with Beamcolumn element. I modeled a simple 7DOF system with BeamColumn elements. I restricted all DOFs except the DOF 1. I expected to have the stiffness matrix of a shear building and calculated the eigen frequencies. they are not what I get from opensees as modal frequencies. But...

I can't download BuildingTcl. the page is not working !