含断续节理岩体的断裂力学数值分析

本文论述了岩体工程中断裂力学数值分析的原理,阐明了在含断续节理的岩体中进行这种分析的基本方法和一般步骤。分析中考虑了荷载作用下因节理的扩展而引起的岩体物理力学性质的改变,进而导致岩体应力、变形的变化和发生节理扩展的岩体范围的扩大。根据单元性质转换原理,编制了逐次加载法的三维有限元程序。将这种分析实际运用于240m高拱坝坝肩,获得了岩体应力、变形和发生节理扩展的岩体范围等多方面的资料。

Numerical Analysis of Fracture Mechanics for Rock Mass with Discrete Joints

This paper deals with the numerical analysis of fracture mechanics for rock engineering. Some basic considerations have been taken for special application to rock mass with discrete joints. Under loading the joint propagation leads to the changes of physical-mechanical properties of rock mass, such as Young's modulus（E） and Poisson's ratio（v）, causing variation of the stress distribution and fractured scopes of joints in rock mass. The computer program of three-dimensional finite element has been compiled using the method of load increment based on the element transition principle. The rock abutment of an h dam of height 240 m has been analysed to evaluate the deformation, stresses and fracturing of rock mass.