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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

28卷

期数:

2011年04期

页码:

39-42

栏目:

出版日期:

2011-12-20

文章信息/Info

Title:

Numerical Realization and Its Test Validation for Nonlinear Characteristic of Rock Mass

作者:

钟正强

长沙理工大学 土木与建筑学院,湖南 长沙 410114

Author(s):

ZHONG Zheng-qiang

School of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha 410114, Hunan, China

关键词:

岩体;  Hoek-Brown准则;  非线性破坏准则;  粘结力;  内摩擦角

Keywords:

In order to describe the characteristics of rock mass based on the nonlinear failure criterion Hoek-Brown criterion;  the numerical realization method for the nonlinear failure criterion Hoek-Brown criterion was proposed. The numerical simulation of the tr

分类号:

TU457

DOI:

-

文献标志码:

A

摘要:

为了采用Hoek-Brown非线性准则描述岩体特征,提出了Hoek-Brown非线性破坏准则的数值实现方法,并对岩体进行了三轴压缩试验的数值模拟,验证了数值计算方法的可靠性,分析了非线性破坏准则中各参数对剪切强度参数的影响。结果表明:通过理论推导可确定Mohr-Coulomb准则中的剪切强度参数与Hoek-Brown准则参数之间的关系; 随着地质强度指标G_SI的增大,岩体的剪切强度参数c和φ均不断增大,粘结力较内摩擦角对岩体地质强度指标的变化更加敏感; 二者随完整岩石的岩体常数m_i的变化幅度均不大,地质强度指标G_SI对岩体强度的影响大于m_i。

Abstract:

In order to describe the characteristics of rock mass based on the nonlinear failure criterion Hoek-Brown criterion, the numerical realization method for the nonlinear failure criterion Hoek-Brown criterion was proposed. The numerical simulation of the tri-axial compressive test for rock mass was carried out, and the reliability of numerical calculation method was validated. The influences of each parameter in the nonlinear failure criterion on the shear strength parameters were analyzed. Results show that the relations between the shear strength parameters of Mohr-Coulomb criterion and Hoek-Brown criterion parameters can be determined by the theoretical derivation; with the increase of geological strength index G_SI, the shear strength parameters c and φ of rock mass increase gradually, and the effect of cohesion to the geological strength index of rock mass is more sensitive to that of friction angle; but their variations with rock mass parameter of integrity rock m_i are not large, and the geological strength index G_SI has larger impact on the strength of rock mass than m_i.

参考文献/References:

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备注/Memo

备注/Memo:

收稿日期:2011-10-28
基金项目:国家自然科学基金项目(50878212)
作者简介:钟正强(1968-),男,湖南长沙人,副教授,工学博士,E-mail:zzq6010@sina.com。

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更新日期/Last Update: 2011-12-20