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Modal nonlinear time history analysis in sap2000

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Ariesliu

Ariesliu

Civil/Environmental
Joined
Aug 16, 2015
Messages
2
Location
GB
Hi,

I'm a student doing earthquake engineering. I've watched some tutorial videos for the modal time history analysis. It shows that to begin with it, I need to define the modal case to be with Ritz vector. But I am not sure if I put the applied load in modal_Ritz case. The pattern I put
QQ%E5%9B%BE%E7%89%8720150816120901_xg1yxg.jpg
as image shows.
Since I want to have the time history analysis continue with 1.1 (DL+LL) case, I add a load case call TH. Show in
QQ%E5%9B%BE%E7%89%8720150816121020_iimdjn.jpg
. I'm not sure about the functions I need to use and also the time step number and size.
I want to know that is it the right procedure to do the modal time history analysis?
 
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