2D model or 3D model for stress under foundation?
2D model or 3D model for stress under foundation?
(OP)
Hi, heres the question - if we want to calculate contact pressures under foundation, which model is more accurate/better 2D or 3D? SEE ATTACHED FILE.
I think plane - 2 d model has too conservative results (stress too big because it doesnt count the contribution/effect of other foundation nearby?)
I like 3D model better. Is it OK? How do you guys calculate this.
tnx for answers.
I think plane - 2 d model has too conservative results (stress too big because it doesnt count the contribution/effect of other foundation nearby?)
I like 3D model better. Is it OK? How do you guys calculate this.
tnx for answers.





RE: 2D model or 3D model for stress under foundation?
RE: 2D model or 3D model for stress under foundation?
sorry if I express my opinion one month after you posted.
What you call the 2D model seems to consider an infinitely rigid strip or a uniform loading.
On the other side, the 3D model has non significant variations in load, practically uniform from the engineering point of view, but a with an absolute value which is intermediate with respect to those of the 2D model. So rigid beams which are interacting in the overall loading distribution?
I would choose the 3D model since the FEM model which appears to have been used is able apparently to consider the interactions among the single foundation members-beams in the grillage structure.
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