Hello All,
I am working on a model using Etabs 2016, I have performed Pushover and time history (FNA) and the hinge results are not complying. In pushover analyses the hinges are forming and showing a reasonable behavior. But in Time history analyses the base shear is coming to be very high while the hinges are not forming. The moment rotation curve is lying between the Point "A to IO" only. What can be done to get a proper behavior of hinges? I have attached the display of hinges for dynamic and pushover analyse.
Dear Kainaat,
I think FNA does not support hinge analysis. Try Nonlinear TH analysis Direct Integration. My experience is not big enough, so wait for someone to get better explanation.
Best regarts.
Hi Kainaat,
When I performed a nonlinear time history analysis, I got hinge information with direct integration. SAP2000 will give you hinge behavior through time according to your step time definition.
I am getting hinge information but it's showing a linear behavior. When i am comparing it with Pushover analysis hinge behavior there is a major difference.
Dear Kainaat,
What is a load function in Your TH analysis and which damping coefficients are You using?
Load functions are 7 GM's and damping coefficient are specified by period for 5% damping.
Greetings Kainaat Nadeem
Did you found the reason of this problem? i am making a model and having the same issues with hinge results
Good question.. Please share me the best answer might you trust...
Regards…
Good question.. Please share me the best answer might you trust...
Regards…
FNA Time History analysis works with RITZ vectors. I think you used normal modal analysis since you had very high base shear. While working with RITZ vectors, you should use enough number of modes though.
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