Modal Analysis

Forum for OpenSees users to post questions, comments, etc. on the use of the OpenSees interpreter, OpenSees.exe

Moderators: silvia, selimgunay, Moderators

Post Reply
Posts: 4
Joined: Mon Aug 27, 2018 3:20 pm
Location: Iowa State University

Modal Analysis

Post by smrithi » Thu Apr 25, 2019 9:03 am

I am relatively new to Opensees and I have been modeling a 3-D high rise building with beam and column springs at the joints following the Ibarra Krawinkler model. But the model is not working for eigen value analysis and it gives me an output that states:
ProfileSPDLinDirectSolver::solve() - aii < 0 (i, aii): (0,0)
The eigen value output is also extremely small. Could anyone guide me on what the problem might be

Posts: 1
Joined: Tue Nov 05, 2019 5:01 am

Re: Modal Analysis

Post by shuaiwang » Tue Nov 05, 2019 5:15 am

hello, friend,
Have you solve that modal analysis question?
I meet the same question.

Posts: 35
Joined: Tue Jun 15, 2010 12:53 am
Location: Thessaloniki

Re: Modal Analysis

Post by vpapanik » Fri Dec 06, 2019 2:23 pm

Post Reply