This document verifies that the Hoek-Brown model is correctly implemented in PLAXIS. For that purpose, the elasto-plastic behaviour of a rock mass is studied via a circular opening subjected to in situ stress in generalized Hoek-Brown material ( α ≥ 0.5 ). PLAXIS results are verified against the closed form solution presented by Carranza-Torres (2004).
It is concluded that the results are in good agreement and the Hoek-Brown model is correctly implemented in PLAXIS.
Used versions:
Hoek-Brown failure criterion
[Publications]
Validation Report of Hoek-Brown model implemented in Plaxis
Response of a rock mass to circular excavation (uniform in-situ stress)
[Videos]
Response of a rock mass to circular excavation (non-uniform in-situ stress)