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soil interaction model in sap2000

soil interaction model in sap2000

soil interaction model in sap2000

(OP)
Hi...
I'm trying to model soil structure interaction on sap2000
I'm solid elements to represent the raft and soil
I want to get moment from this model to compare it with anthour model where i represented the raft as shell element and soil as springs but sap2000 gets stresses for solid elements only so :
1- how can i get moments from solid elements in sap 2000?
2- Is there any thesis that discuss this point in soil interaction ?

thanks a lot

mai

RE: soil interaction model in sap2000

Hi,
Is it OK when you solid elements to present the raft and soil? They are different material. Can define link element (like gap) to present this connection.

RE: soil interaction model in sap2000

Moment is a concept based on the stress and lever arm. Moment is defined only for Beams and Planes where its thickness (or cross section ) is based on the section property. If you want to get the moments for a solid, you have to calculate it manually by taking the stresses on either side of the solid block and then based on the section modulus the moment has to be calculated.

RE: soil interaction model in sap2000

(OP)
PlasmaStruc i tried to get the moments manually by getting the max stresses at the joints of solid element and applying the equation stress=M*y/I ,,but i think i have to integrate the stresses along the faces of solid element what do you think?

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