Hi,
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
Cdy
Solved! Go to Solution.
Solved by Artur.Kosakowski. 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
Please read:
http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Uplift/m-p/3320823/
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Hi,
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.
Thanks