| 岩体非线性特征描述的数值实现及其试验验证 |
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| 引用本文： | 钟正强. 岩体非线性特征描述的数值实现及其试验验证[J]. 建筑科学与工程学报, 2011, 28(4): 39-42 |
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| 作者姓名： | 钟正强 |
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| 作者单位： | 长沙理工大学 土木与建筑学院,湖南长沙,410114 |
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| 基金项目： | 国家自然科学基金项目(50878212) |
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| 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GSI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mi的变化幅度均不大,地质强度指标GSI对岩体强度的影响大于mi.
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| 关 键 词： | 岩体 Hoek-Brown准则 非线性破坏准则 粘结力 内摩擦角 |
Numerical Realization and Its Test Validation for Nonlinear Characteristic of Rock Mass |
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| ZHONG Zheng-qiang. Numerical Realization and Its Test Validation for Nonlinear Characteristic of Rock Mass[J]. Journal of Architecture and Civil Engineering, 2011, 28(4): 39-42 |
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| Authors: | ZHONG Zheng-qiang |
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| Affiliation: | ZHONG Zheng-qiang(School of Civil Engineering and Architecture,Changsha University of Science & Technology,Changsha 410114,Hunan,China) |
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| 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 r... |
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| Keywords: | rock mass Hoek-Brown criterion nonlinear failure criterion cohesion friction angle |
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