Hello
Recently I have heard that just SAP should be used for dynamic analysis of building and the results of ETABS are not valid for nonlinear dynamic analysis. I have done nonlinear dynamic analysis with Etabs software. Are the results acceptable?
Is there any evidence for this?
Thanks in advanced
Dear Ali Mirzaee
I remember that ETABS couldn't consider material's nonlinear behavior (plastic hinges) in the time-history analysis. However, they said we would add this feature to ETABS in the future. I am not sure whether it is activated in ETABS's latest version or not.
If I were you, I would use SAP2000 for nonlinear dynamic analysis.
dear @mehran shahpari
You mentioned a good case. If this is due to the plastic hinge, it should be said that this is the case in the new versions.
I have been done my model's analysis before and heard about this later. Thank you for your good answer. I will check with SAP to find the probable difference
I think this is completely incorrect, as evidenced by the existence of this option in the Etabs program, because I did a nonlinear analysis with it, and the results were acceptable. Finally, you can analyze a simple frame with both programs and check for yourself
Dear Ali Mirzaee
Both programs that you mentioned, could able to nonlinear analysis based on plastic Hinge, and both results are accepted. But you must notice that the operation that SAP2000 use to run nonlinear analysis is faster that ETABS and I strongly recommended that if you want to do nonlinear analysis for a frame structure use SAP2000 or higher programs such as PERFORM 3D instead of ETABS, especially if you want to do nonlinear analysis for your articles.
Best Regards
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