坝肩节理岩体稳定的三维弹塑性断裂有限元分析

A Three Dimensional Finite Element Stability Analysis of Pam Abutments of Jointed Rock Using Eiasto-Plastic Fracture Model

摘要: 本文根据节理岩体的力学特征提出了适用于节理岩体的弹塑性断裂模型。该模型可以反映断续节理在荷载作用下的断裂扩展、贯穿、以及屈服破坏过程;既考虑了三维非正交节理的作用,也考虑了节理面粗糙对节理强度和变形的影响。本文据此编制了三维有限元程序,并应用于某实际工程的拱坝坝肩岩体稳定性分析。本文叙述了此计算分析获得的坝肩节理岩体应力、变形、节理的扩展和屈服范围及坝肩安全度等诸方面的结果,并示出计算分析与模型试验结果的对比。

Abstract: In this paper, as clasio-plastie fracture model for jointed rock is proposed. This model is employed to evaluate the initiation, propagation,extention, breakthrough of cracke. failures of rock masees and the three dimensioaal stability of dam abutme-ate. The calculated r sulte givem in this paper agree very well with model toste.