Plaxis 2D interface setting & excess pore pressure input

RE: Plaxis 2D interface setting & excess pore pressure input

Stefanos Papavasileiou — Wed, 21 Apr 2021 07:29:21 GMT

Dear 树锋赵,

That is difficult to judge without seeing the details of the research and the PLAXIS model.

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RE: Plaxis 2D interface setting & excess pore pressure input

树锋赵 — Wed, 21 Apr 2021 03:18:30 GMT

Thank you for your answer Mr.Papavasileiou.

I have tried to use different custom materials to assign to the interface, but the results still deviate from previous research by 20%. Is this due to the software itself?

RE: Plaxis 2D interface setting & excess pore pressure input

Stefanos Papavasileiou — Tue, 20 Apr 2021 13:13:21 GMT

Dear 树锋赵,

To answer both questions:

1. The Rinter was not implemented to work with such low factors, as this can cause numerical issues. You can use a Custom material to assign to the interface and directly apply the stiffness and strength you want for your case.

2. Excess pore pressure is a result of a PLAXIS calculation and cannot be given as input value.
Note that excess pore pressures can develop due to undrained behaviour when one of the relevant options are selected in the material data set. As you might expect this is ignored in Consolidation and Fully coupled analyses.