Greetings,
I need to model slope with unhorizontal soil layers.
We have recently purchased Plaxis 2d Connect and we always have the same problem. The problem is that initital phase (gravity loading) stops already after few seconds. The message is that soil body collapses (error 101) even after increase of parameters. We have checked model fixities and everything is ok.
In the output program soil collapses unlogically in the upper right corner of the model.
We used older Plaxis versions and we never had such strange and unrealistic failures after only 3 seconds of initial phase calculation.Please help, the image of soil colapse is attached. Why is this happening? Oldeversions we had never had such issues.
Dear Emir,
From the screenshots, I can see that the Xmax (right) boundary has no fixities applied. These are the green lines seen for the Xmin (left) and Ymin (bottom) boundary.
Please double-check the settings in the Model explorer > Deformations > BoundaryXmax and make sure that is Normally fixed.
In order to be able to assist you with your project and identifying the reason for the problem you experience, please submit a service request.
Then, one of our support engineers can help you in detail: https://apps.bentley.com/srmanager/ProductSupport
Dear Stefanos, the fixities are in accordance with Your suggestion, for some reason the xmax boundary is not included although it is prescribed as normally fixed
Some times part of the geometry is slightly outside the vertical boundary, and the fixities are not properly applied.
You can check that in Structures mode, per polygon by double-clicking on it and view the Points. In general, all points at the boundary should be at the same y-coordinate. You can use the following command to help you find if a point is outside: echo Polygon_1please replace the Polygon_1 with the name of your polygon.
If you still have problems solving this, please submit a service request so that we can check your project directly.
Thanky you Mr. Stefanos, coordinates are ok, i have sent packed model to support service
Hi Emir,
How did it go with the problem? I am facing similar problem, maybe I could use your solution.
Thank you and regards.
Sometimes it's also worthwhile to check the unit weight of soils, especially in offshore modelling cases where you may wrongly enter submerged unit weight instead of saturated unit weight.
May I ask what is the difference between submerged unit weight and saturated unit weight?
Hi Rayyan,
Submerged unit weight of soil is defined as the difference between its saturated unit weight and the unit weight of water.
Submerged unit weight = Saturated unit weight - Unit weight of water