渗透压力对裂隙岩体损伤破坏的研究

基于Betti能量互易定理推导了含水裂隙岩体初始损伤柔度张量和损伤演化方程，建立了考虑渗透压力的裂隙岩体脆弹性断裂损伤本构模型。并提出采用渗透压力附加柔度张量的概念来定义渗透压力对岩体力学特性的影响。工程算例结果表明：当岩体中有地下水活动时，考虑渗透压力对损伤区的影响是十分必要的。

Influence of seepage pressure on damage of fractured rock mass

Based on Betti energy reciprocal theorem, initial flexibility tensor and damage evolution of rock mass subjected to seepage pressure are presented. And an elastic fracture-damage constitutive equation taking account of seepage pressure is also established. The concept of additional flexibility tensor is introduced to indicate the influence of seepage pressure on the mechanic characteristics of rock mass. The results obtained from a practical project show that the seepage pressure is of great importance to damage evolution when there is groundwater flow in fractured rock mass.