There is a building with 5 basement levels. Top-down sequence is going to be applied. This deep excavation is modeled using Plaxis software.
The basement RC slab are used as horizontal strut to support the Diaphragm wall. Hence, the the lateral earth pressure cause the in-plane strut forces in the basement RC slabs.
The basement RC slabs need to be checked with load combination of gravity load and in-plane force.
The in-plane strut forces in these slabs are obtained from Plaxis.
Then these in-plane forces are applied manually in the slab model using CSI SAFE program.
My question is that:
Does CSI SAFE program take into account the in-plane force in the analysis?
Thanks.
I am not getting your question. It looks to me you are going to simulate the excavation with strut system to support the excavation using PLAXIS. Then, the plane forces as obtained form the PLAXIS analysis are to be used to check the stability of the strut system using CSI SAFE program. I am thinking both the prediction of an excavation response for 5 basement construction and check for the stability of supporting structure can be simulated using PLAXIS software itself. So, I recommend you to read the publication related to your topic mainly the PLAXIS software based publication. You can simulate the problem using PLAXIS sosftware. I also suggest to you to read PLAXIS manual for the better simulation of your work..all the best..
Actually. You can use Plaxis to check the stability of the slab. Then, SAFE, just uses to design the RC slab with the loads and stress that you reached from plaxis. However, you note that using springs on the one side of the slab to model soil, will not present soil behavior as it has.
You should be able to check whether the software takes account of in-plane actions form the stress outputs in the software (I assume it provides you with this). I would expect that the in-plane loads would increase the capacity of your slab with the caveat that the second order effects are low (which should be derived by hand and added as pure bending to your model).
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