Some questions about the parameters of plate element

RE: Some questions about the parameters of plate element

xin Fang — Mon, 17 Apr 2023 16:26:18 GMT

Dear Stefanos,

Thank you very much for your answer！

In fact, I have carefully read the two links you recommended to me, but I am still not sure about the specific calculation method of plate unit weight. Can you give me an example of plate unit weight calculation with two layers of soil and groundwater level is -0.5m? And the link only mentions "the actual weight of the plate, w, is, therefore, the difference between the weight of the plate and the soil occupying its true volume". However, for the same plate element , It completely occupies the soil in the first phase and partially occupies the soil in the second phase. For this situation, should I choose γ = γconcrete-γsoil or γ = γconcrete-0.5 * γsoil ? In short, do I need to assign different γ to the plate before and after excavation？

RE: Some questions about the parameters of plate element

Stefanos Papavasileiou — Mon, 17 Apr 2023 10:39:34 GMT

Dear Xin,

Please check our Wiki article about this: Considerations for modelling a thick slab as a plate

And another relevant Forum post on the topic: Buoyancy effect on plates for PLAXIS 3D

RE: Some questions about the parameters of plate element

xin Fang — Sat, 15 Apr 2023 12:59:11 GMT

I would be grateful if any geotechnical engineer could answer this question for me！