IDA analysis questions

[wangyanan]

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.

[huffte]

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.

[seismosoft]

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?

SeismoSoft Support