Hello.
I have been working with cantilever walls. from 7.5m to 20 m long. I need to obtain the shear and moment distribution at each floor so I am modelling 2.5 m long elements.
Such distribution is quite difficult to run using a force convergence criteria which is recommended for these cantilever walls. After several attemps and very small time steps I was able to run all of them in a previous version of the program. However, with the new version the program stops after a few steps. Does anybody know what changes were made to cause this?
Thank you
Convergence diffculties
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seismosoft
- Posts: 1271
- Joined: 06 Jul 2007, 04:55
Re: Convergence diffculties
Hi,
One should employ the much more demanding force-based convergence criterion only if its absence leads to spurious jumps in the response curves (not eliminated by a tight displacement-based criterion).
Hence, if your analyses without a force-based convergence criterion produce reliable results (e.g. similar to those previously obtained with the force-based criterion activated), then you may proceed in this manner.
If, on the other hand, you do need to run the analyses with a force-based criterion activated, we would need to see the model itself in order to be able to provide hints on how to overcome the experienced difficulties.
Seismosoft Support
One should employ the much more demanding force-based convergence criterion only if its absence leads to spurious jumps in the response curves (not eliminated by a tight displacement-based criterion).
Hence, if your analyses without a force-based convergence criterion produce reliable results (e.g. similar to those previously obtained with the force-based criterion activated), then you may proceed in this manner.
If, on the other hand, you do need to run the analyses with a force-based criterion activated, we would need to see the model itself in order to be able to provide hints on how to overcome the experienced difficulties.
Seismosoft Support