here. Hopefully we will be able to get the most useful of these incorporated in the manuals.
I need to model a structural frame element, instead of SDOF or shear beam, using Bouc-Wen model. It means I need to couple material nonlinearity (Bouc-Wen model) into local stiffness element of all the frame members and assemble them.
I have problem to write the local stiffness element, is it still symmetric?
Has someone ideas or useful scripts? It probably has been done already.
Dear Silvia, could you help me?
Thank you in advance.
Indeed, I don't need to work on the local stiffness matrix but only global one.
Specifically for Bouc-Wen model, I guess what I need to do is like this: write down the global stiffness matrix first, then modify it by multiplying *alpha_1* (Bouc-Wen model parameter corresponding with DOF 1) to column 1, *alpha_2* to column 2 and *alpha_n* to column n. Then imaginary displacement Z (for example, z_1) would be defined according to DOF 1 related Bouc-Wen parameters. Am I right? I am not quite sure.
This is not so much related to C++, but just the theory of nonlinear model. What I originally want to do is to get a implemented scripts and figure out how they write the Equation of Motion.
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