Stability (Slope/Ground Failure)

This chapter describes the calculation of stability using the reduced strength method (Phi-C reduction).

Important

Prerequisites:

It is necessary to activate both the “Geotechnical Analysis” and “Structure Stability” add-ons in the Base Data.
A soil massif must be created.

Info

Recommendations:

The stability analysis should be performed with only one load step (load increment). If convergence is not achieved, the number of iterations can be increased or the accuracy reduced.
The Mohr-Coulomb model with the non-regularized yield surface should be used as the material.

As is usual when calculating Structure Stability, it is necessary to activate the critical load calculation in the “Load Cases and Combinations” window. When editing the Stability Analysis Settings, the “Reduction Method for Material Properties (Nonlinear Geotechnical Engineering)” can now be selected. The following image shows this.

Geotechnical Stability Analysis – Stability/Ground Failure

After the calculation, the results of the nonlinear stability analysis are now available. First and foremost is the safety factor. This can be found in the result table under Overview. An example is shown in combination with the

Geotechnical Stability Analysis – Results

Parent Chapter

Load Cases and Combinations