Analysis in 2D

[khan0099]

Dear sir !
i am asking a question irrelevant but i need it's answer , i have design a 3D model in etab , which i want to analyse in seismo-struct . my question is can i analyse a 3D model in 2D in seismo-struct , Is there any changes in result will be occur or not , need an explained answer ,
Thank you
regards

[z.gronti]

Dear Khan,

There will be changes if you analyze a 3D model as a 2D model. The changes depend on the simplifications you make.

[ruipinho]

khan0099,

Is there a particular reason why you wish to force a 2D analysis in SeismoStruct? Why do you not simply build a 3D model of your structure in SeismoStruct?

Best,

Rui

[khan0099]

dear sir !
it took alot of time to analyze a 3D model in seismo-struct ,
Can you explain the changes that will happened when i analyze a 3D model in 2D in seismo-struct .

[ruipinho]

khan0099,

Yes, a 2D analysis will indeed be faster than a 3D one.

However, naturally, if your structure is not regular in plan and/or your seismic input is bidirectional, then your 2D simplification will inevitably introduce errors.

I suggest that you run some experiments with small sub-sets of your full model, comparing the results you obtain with 2D and 3D analyses, and then withdraw your own conclusions.

Best of luck with your investigations,

Rui