Greeting for everyone,
I use Plaxis 3D to simulate deep excavation using Butress wall and Cross wall. However, when I activate interface in the early phase (using very small Rinter value), the severe divergence occurs in the output results. Is there any ways to encounter this problem? Thanks in advanced.
Hi,
Please note that when using Rinter, this will reduce the strength of the interface with Rinter, but the stiffness of the interface will be reduced with (Rinter)^2. So when using Rinter = 0.01 you will actually reduce your interface stiffness with 0.0001 .... And this is probably the cause of your problems.The solution is to create a separate material set for your interfaces in which you either
With kind regards,
Dennis Waterman
Answer Verified By: 敏清 劉
Dear Dennis,
Thank you for your kind help. It is work using your way, but I should reduce the stiffness parameter same as strength parameter (multiplied by Rinter).
However, I still have a problem regarding the stiffness reduction (note: I use hardening soil). It is because when I reduce Eoed ref to become very small, some error will be appeared. Is there any way to neglect this issue?
Thank you.
You can try to simplify the model (either geometry or soil cluster) to check if the problem is due to the complex model.
Moreover, since you are modeling the retaining wall, butress wall, and cross wall using plate element, you might need to select “prevent punching” to provide some vertical end bearing (tip resistance) to encounter the problem when activating the interfaces with low Rinter value. For further information regarding this option, you can read though Reference manual.
Dear Ari,
Thank you for your kind help. I will try you method to solve problem.