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Thank you very much! I will change the element type and try again.

Hello everyone, I'm trying to do a pushover analysis on a 3 storty 3 bay 2D RC frame with fiber section. The results of pushover is very strange. 1. The axial force in the bottom section of the column is very small only 12726.2N, but the nodal axial force at the same position is 235068N 2. I got lar...

Thank you very much!

I built a 2D RC frame. At first, the model was built 2 nodes per beam/column (1 element for 1 beam/column). The model runs well and everything was fine. Then I added more elements in the model (1 beam/column divided into 5 element) because I want to define different sections in the beam/column. The ...

Thank you very much for replying! I did try stronger ground motion, but still got same result

I built a 2d 3 story 2 bay RC frame. Then I run the time history analysis. The model runs good, everything seems fine. But then, I reinforced the structure with extra FRP materials and run the time history analysis, I got the same results as the un-reinforced model. At first I thought was the gravit...

Dear Zhi
I meet the same problem as you do. The use of equalDOF would lead to inrealistic axial force and moment in beam when using the nonlinear element (here is the ref: https://opensees.berkeley.edu/wiki/inde ... nsequences). I also wonder have you manage to solve question 1?

For a 3 storied 1 bay 2d structure model, I simulated the effect of Diaphragms by using the command equalDOF. But it arouse the problem of inrealisitic axial force and moment in the beam. So I'm wondering how should I do to simulate the the effect of Diaphragm, withou using the command equalDOF. Tha...