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Hi everyone, I have a question regarding calculating drift ratio while the base is flexible (soil-structure interaction case). When the base is fixed, the drift would be the difference between displacements of two consecutive floors. However, when the base is flexible, an additional term, base rotat...

Any idea?! It's my question as well!

Since no one has answered it yet, I am posting the answer that I received from someone expert in OpenSees. ""Leaning columns are aimed to represent the effect of gravity columns present in a 3-d structure but being neglected in modeling the system by including only the lateral system. Grav...

Dear Opensees team members, I have a question regarding leaning column modeling. What percent of the total gravity load on each floor should be assigned to the leaning column node on the same floor. Imagine a 1-bay 2-story moment frame. Each of its four nodes has a gravity load = P . Then, what shou...