Finite element analyses of computational effects with of different shear strength expressions for layered rock mass

ZHANG Yu-jun; ZHANG Wei-qing

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Finite element analyses of computational effects with of different shear strength expressions for layered rock mass

更新时间：2026-06-25

- Finite element analyses of computational effects with of different shear strength expressions for layered rock mass
- Vol. 35, Issue S1, (2014)
- 作者机构：
  
  1. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉,430071
  2. 中铁隧道勘测设计院有限公司,天津,300133
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU452
- Online First：20 June 2014，
  
  Published：2014
- 稿件说明：
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ZHANG Yu-jun, ZHANG Wei-qing. Finite element analyses of computational effects with of different shear strength expressions for layered rock mass[J]. 2014, 35(S1).
DOI：

ZHANG Yu-jun, ZHANG Wei-qing. Finite element analyses of computational effects with of different shear strength expressions for layered rock mass[J]. 2014, 35(S1). DOI：

摘要

为考察不同的各向异性抗剪强度表达式对于数值计算结果的影响，以一个假定的位于层状岩体中的矩形地下洞室为背景，分别使用笔者和Pietruszczak各自提出的材料摩擦系数和黏聚力随方向变化的公式，进行3种工况的弹塑性二维有限元模拟，对比了围岩中的应力、位移及塑性区。结果显示，笔者提出的经验表达式与和相应的Pietruszczak一阶表达式在计算中的精度基本相当，而与Pietruszczak的二阶表达式相比有较明显的差别。

Abstract

In order to investigate the effects of different anisotropic shearing strength expressions on numerical computation results

the two-dimensional elastoplastic finite element analysis were carried out for an assumed rectangular underground cave in a layered rock mass for three cases

in which the empirical formulae for internal friction coefficient and cohesion of material which change with directions suggested by the first author and S. Pietruszczak were applied respectively. The stresses

displacements and plastic zones in the surrounding rock mass are compared. The results show: the computational accuracy of using the empirical expressions established by the first author matches basically with that of using the first-order approximations given by Pietruszczak; but there is a comparatively obvious difference between the computational accuracies of using author’s empirical expressions and Pietruszczak ‘s 2nd order approximations.

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