Seismosoft | Earthquake Engineering Solutions

Hi, huffte.I have search 'fbd_inv' on forum and the help. It means stiffiness matrix can not be inverted. My problem is that the same model can be analyzed under 0.4g while not under 0.62g. Is there something wrong with my model?

Hi, seismosoft! I hope there will have temperature loads or temperature conditions in future.Because some materials are sensitive to temperature. If we can define the temperature, I think it would be more accurate.
Thanks!

<t>Hi,huffte. Thank you for your help firstly. <br/>
I have 74 isolators in my model, it is a super-long isolated structure with irregular plane. I want to do dynamic history analysis.<br/>
I still wonder that if I develop a simple sine wave, should I add this real time history on node1 or node2 ...

<t>Hi, everyone!<br/>
I want to analyze an isolated structure with initial displacement on isolators. Should I add permanent load(displacement) on the isolators? If it is right, I wonder whether I should add the displacement on node1 or node2? I've tried this, but the response of the upper structure ...

<t>Dears,<br/>
I want to know is there any limits in this software? I want to do the time-history analysis of a base isolation structure. But I have not successful until now, although I have did many adjustment. So I modeled a small structure that it can be analyzed well. At the same time, what I ...

Thanks, huffte. I forget to use the 'search'. Thank you very much.

I have an other problem.
I want to do the time-history analysis and I selected the load curves from the file (Kobe.dat). But it terminated.
Unable to apply the next load step.
Please help me. I want to know how to solve this problem.
Thanks!

huffte, thanks a lot. I have received your e-mail. I will study it. Thanks again for your help.

Hi,huffte. I had used bl-kin to model the lead-rubber-bearing. And I want to know how to link the node and the base? I want to model a base isolated structure. I've tried many times, but there's something wrong.
Thank you for your help!

Hi, Stelios. Thanks. Actually, when I tried to add No.876 element, I met this error. But when I waited for a while, this problem was gone.
But I meet the same problem today, also waited for a while, I can add element continually. I don't know why.
Thanks again.