层状裂隙岩体弹塑性损伤断裂模型与岩质高边坡稳定分析

本文研究了层状裂隙岩体的弹塑性损伤断裂模型。文中按岩体等效柔度张量定义损伤张量,并对层状裂隙岩质高边坡的变形破坏过程建立了损伤演化方程,提出了包含软弱薄层塑性滑移与裂隙损伤扩展耦合性态的本构关系。最后将其应用于某水电站左坝肩高边坡开挖形成过程的稳定性分析中。

ELASTO-PLASTIC DAMAGE FRACTURE MODEL FOR BEDDED AND JOINTED ROCK MASSES AND ITS APPLICATION TO SLOPE STABILITY ANALYSIS

An elasto-plastic damage fratcure model for bedded and jointed rock masses is studied in this paper. The damage tensors are defined through the equivalent flexibility tensor of the rock mass and the damage evolution laws are proposed involving the deformation and failure processes of rock slopes with the bedded and jointed rock masses. A constitutive relation including the coupled behaviours of plastic flow in soft strata and damage fracturing in rock joints is developed. Finally, the proposed model is applied to the stability analysis of the left abutment slope in a hydro-power station during excavation.