A question about the duration of analyses in opensees!

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foadEng
Posts: 28
Joined: Sun Jan 24, 2010 12:51 pm
Location: Iran

A question about the duration of analyses in opensees!

Post by foadEng »

Hi
I am modeling 3D structures in OpenSees. I have modeled a six story (3D) building and I want to perform some pushover analyses. But the problem is that it takes a long time to finish the analysis! Even for gravity analysis, it takes about 4 or 5 minutes to finish the analysis! I just wanted to know that if this is normal or not? Is this related to this fact that my model is three dimensional or not?!
Thank you very much
Foad Mohajeri Nav
Iran University of Science and Technology
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fmk
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Posts: 5884
Joined: Fri Jun 11, 2004 2:33 pm
Location: UC Berkeley
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Post by fmk »

A six story 3d building can be large or small depending onhow you model it and number of bays in x and y directions! .. if your model is taking a long time change the solver to be a sparse one, SparseSPD or Umfpack work well.
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