A modified Hoek-Brown failure criterion for anisotropic rock mass

被引：0

作者：

Li L. ^{[1
]}

Zhang C. ^{[1
]}

Wang W. ^{[2
,3
]}

机构：

[1] PowerChina Huadong Engineering Corporation Limited, Hangzhou, 311122, Zhejiang

[2] Geotechnical Research Institute, Hohai University, Nanjing, 210098, Jiangsu

[3] Key Laboratory of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing, 210098, Jiangsu

来源：

Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2018年 / 37卷

基金：

中国国家自然科学基金;

关键词：

Anisotropy; Failure criterion; Hoek-Brown criterion; Rock mechanics; Strength;

D O I：

10.13722/j.cnki.jrme.2016.1592

中图分类号：

学科分类号：

摘要：

The Hoek-Brown failure criterion has been widely used for the determination of the strength of intact rock and rock mass in isotropic conditions, but cannot describe the anisotropic characteristics of rock and rock mass. In this paper, an anisotropic failure criterion is proposed based on the Hoek-Brown failure criterion by introducing an anisotropic parameter, which is associated with microstructure tensor aij and loading directions lij, to the parameters mb and s, and the sensitivity of parameters used in the anisotropic failure criterion are discussed, and the strength of rocks obtained by the proposed criterion are compared with test results. It is shown that the proposed anisotropic failure criterion can describe the variation of material strength in function of the orientation of the sample relative to the loading direction, and this criterion can be degenerated to the isotropic Hoek-Brown failure criterion. The principle value Ωi of the deviatoric part of microstructure tensor has a significant effect on anisotropic characteristic of rock mass, and determines the degree of anisotropy. The mean value of microstructure η0 affects the strength of rock mass, and the elasto-plastic parameter α has little effect on anisotropic characteristics of rock mass. © 2018, Science Press. All right reserved.

引用

页码：3239 / 3246

页数：7

共 21 条

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