Seismosoft | Earthquake Engineering Solutions

I made an IDA analysis, but the IDA curves didn't have horizontal segment, the SeismoStruct stop caculation. I dont't know the cause that induce this.

Hi wangyanan. I think the best place to start is always a forum search on the phrase IDA. You will get many hits regarding discussions which have taken place on the topic. Of particular interest may be the following by ruipinho:

http://www.seismosoft.com/forum/topic.asp?TOPIC_ID=1177

You could investigate this and other discussions on the forum as well to begin solving the problem.

Best of luck.

When you say stop calculation you mean that the analysis diverged? In such case, carry out a search in the forum with the word 'convergence', you will find numerous posts.
Alternatively, can it be that you should increase the IDA loading factors?

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