Undrained effective stress safety analysis
Undrained effective stress safety analysis
The main goal of this work is to examine the short-term stability and robustness of natural slopes on an effective stress basis. This may be done using Janbus dilatancy parameter, D, to control the effective stress path for undrained loading from the initial (static equilibrium) stress condition towards the Coulomb criterion. The concept has previously been implemented in a limit equilibrium program to do an ESAU (Effective Stress Analysis Undrained) for slopes. This work revisits the ESAU concept, now applied in finite element analyses using a hardening elastoplastic Mohr-Coulomb model with the D parameter and a strength reduction scheme. However, as indicated by Potts and Zdravkovic, the definition of safety considering a strength reduction scheme is not that straightforward with an elastoplastic hardening model. ESAU is applied to a case study of a failed natural slope and to a hypothetical natural slope.
Gustav Grimstad; Ivar Jevne Arnesen; Brede Bull; Davood Dadras-Ajirlou
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
7. Dams, embankments and slopes
https://doi.org/10.53243/NUMGE2023-20
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