多裂隙岩体的损伤断裂模型及模型试验

对于由裂隙、岩石组成的多裂隙岩体,本文通过对裂隙岩体内的应力、应变的体积平均,提出了适合于这种岩体的等效连续模型。运用损伤力学以及断裂力学理论,定义了岩体损伤张量、有效应力张量、损伤应变等,建立了损伤演化方程,从而建立了多裂隙岩体的损伤断裂模型。对岩体裂隙的扩展方式进行了模拟试验。

The Damage Fracture Model for Jointed Rock Mass and Model Tests

In this paper, an equivalent continuum model for rock mass which consists of joints and rock is proposed by averaging the stress and strain of rock mass in a volume element. Using the theory of damage mechanics and fracture mechanics, the damage tensor, effective stress tensor and damage strain ,etc. of rock mass are defined, propagation equation of damage is developed. Furthermore, the damage fracture model for jointed rock mass is established. The fracture mode of joints is studied by model tests.