I am trying to run a "Analyse Non Lineaire" on a model that include seismic loading. (see attached)
I have some problems :
- I have around 10 on 47 seimic combination that have NO "convergence"
- I don't no if there is a report where the calculation errors are written on to debug
- the seismic cases without vertical dead load is "converging". No sense.
- the ground reaction presure is not true on combination that includes seismic loads (I found manually unfavorable presure)
Thanks for helping
Solved! Go to Solution.
Sorry it's fine now,
I had a problem on my Newmark combinations.
Somebody now why when modal sismic analysis is running on a non linear model the combination are linear for all of those that includes sismic case.
Combination without modal sismic cases inside are non-linear combinations.
Other problem : the seismic cases : Robot doesn't take into acount the uplift free in these loading cases, isn't it?
I think Robot is wrong. It is very dangerous.
I can I solve the problem? Maybe If I convert manually each load into an horizontal static load for run my model in static non-linear only?
I attach the last model for exemple
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It is exactly what I need to confirm my doubts.
Thanks a lot
I also understand now problem métallic frame analysis I had in the past.
It is quite dangerous ! calculation is runing well without any warnings.
I am usual to make a separate model to design my rafts. It is fine.