Question regarding Response Spectrum Analysis .

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lesgidis
Posts: 2
Joined: Thu Dec 29, 2011 6:48 am
Location: Aristoteleio Panepistimio Thessalonikis

Question regarding Response Spectrum Analysis .

Post by lesgidis »

I am having a 2storey 3d structure which i have to solve with Response Spectrum Analysis , and since Opensees is unable to solve the model with the above method , i was wondering if there is a way to export the stiffness matrix , or the modals of the eigen analysis .
Thank you for your time .
vesna
Posts: 3033
Joined: Tue May 23, 2006 11:23 am
Location: UC Berkeley

Re: Question regarding Response Spectrum Analysis .

Post by vesna »

There is no OpenSees command that returns stiffness matrix. Look at this example: http://opensees.berkeley.edu/wiki/index ... -bay_frame to see how you can get modal information.
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