Linear Vs Nonlinear TH analysis - Chopra chapter 7.4.1
Linear Vs Nonlinear TH analysis - Chopra chapter 7.4.1
(OP)
Hello everyone
I am trying to redo an example from Anil K. Chopra book, where he finds the Response of Linear Elastic and Elastolastic system with Tn=0.5 s and no damping, to El Centro ground motion. He finds the displacement u=3.34in for Linear system and 1.71in for Elastoplastic system.
So I succeded to find almost same result for the Elastic system, but when I do Non Linear time History Analysis, my results are almost the same as the elastic system. I have used 3 hinges in beam and 2 hinges in columns.
Could some one please look at the attached file and look at the load, Modal and time history cases and check if there is anything wrong.
I did read here on this forum that you can use hinges with TH Analysis.
Kind Regards
Wais
I am trying to redo an example from Anil K. Chopra book, where he finds the Response of Linear Elastic and Elastolastic system with Tn=0.5 s and no damping, to El Centro ground motion. He finds the displacement u=3.34in for Linear system and 1.71in for Elastoplastic system.
So I succeded to find almost same result for the Elastic system, but when I do Non Linear time History Analysis, my results are almost the same as the elastic system. I have used 3 hinges in beam and 2 hinges in columns.
Could some one please look at the attached file and look at the load, Modal and time history cases and check if there is anything wrong.
I did read here on this forum that you can use hinges with TH Analysis.
Kind Regards
Wais





RE: Linear Vs Nonlinear TH analysis - Chopra chapter 7.4.1
The time history analysis has 1 G scale factor (9.8 m/s/s). Is that scale factor adequate to cause yielding at the hinges? I did not investigate further. Also, your hinges were assigned at frame stations 0 and 1. I was taught to assign hinges slightly offset from the end points, relative distance .02 and .98 for example instead of 0 and 1.