No Reduction Regions
Frame "No Reduction Regions" contains a table of defined regions where the strength parameters are not reduced during stability analysis.
The input of the regions is identical to the standard input of interfaces.
In the stability analysis, we can define regions in which the strength parameters phi a c are not reduced. The regions without reduction are input in the chosen construction stage by a polygonal boundary. The reduction of strength parameters is prevented in every finite element that is - at least partially - positioned within the region.
The regions without reduction of strength parameters are helpful in situations where the stability analysis does not lead to the global shear surface and the failure kinematics together with the value of factor of safety is unreliable.
The feature is applicable to all material models admissible in stability analysis, i.e.
- Mohr-Coulomb
- Modified Mohr-Coulomb
- Drucker-Prager
Other material models are not allowed in stability analysis.