砂土中主应力与内摩擦角统一关系研究

肖杨; 刘汉龙; 陈育民

砂土中主应力与内摩擦角统一关系研究 English Version

肖杨^1,2,
刘汉龙^1,2,
陈育民^1,2

1.河海大学岩土力学与堤坝工程教育部重点实验室，江苏南京 210098; 2. 河海大学岩土工程科学研究所，江苏南京 210098

基金项目: 国家杰出青年科学基金项目（50825901）；国家自然科学基金委员会、二滩水电开发有限责任公司雅砻江水电开发联合研究基金项目（50639050）；国家留学基金项目（2010671026）；江苏省土木工程研究生科技创新基金资助，中央高校基本科研业务费专项资金资助（2010B15014）；江苏省普通高校研究生科研创新计划项目（CX10B_207Z）

详细信息

作者简介:
肖杨 (1982 – ),男，江苏徐州人，博士研究生，主要从事土体基本特性及本构模型研究。

中图分类号: TU441
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出版历程
- 发布日期: 2012-06-19

Unified relationship between intermediate principal stress and internal friction angle for sand

1. Key Laboratory for Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China

摘要

摘要: 提出了一种适用于砂土的各向异性破坏准则，该准则能够反映不同砂土各向异性破坏特性，其参数可以根据某些特定应力区的三轴压缩和三轴拉伸试验结果获得，即根据强度比值确定。为了考虑不同应力区内的中主应力对内摩擦角的影响，提出了广义中主应力系数和广义内摩擦角的概念和表达式，并且建立了基于一种各项异性破坏准则的内摩擦角和中主应力系数的统一显示表达式。通过对一些真三轴试验结果预测，结果表明所提出的摩擦表达式能够整体上描述各向异性砂土的中主应力系数对内摩擦角的影响。
- 各向异性 /
- 破坏准则 /
- 中主应力 /
- 强度 /
- 内摩擦角
Abstract: An anisotropic failure criterion is proposed to present anisotropic failure behaviors for different kinds of sand, which can be employed to simulate both isotropic and anisotropic strength behaviors of granular materials. The model parameters can be determined by the strength ratios based on the triaxial compression and extension tests in different stress areas. Concepts and expressions are put forward for the generalized intermediate principal stress parameter and the generalized internal friction angle, respectively. The generalized expression of the internal friction angle influenced by the intermediate principal stress parameter is deduced based on the proposed anisotropic failure criterion. This generalized explicit expression is available for different soil strength criteria to establish the relationship between the internal friction angle and the intermediate principal stress parameter. Comparisons between simulations and test results show that this general expression of the internal friction angle can well reproduce the true triaxial test results of soils in all stress areas.
- anisotropy /
- failure criterion /
- intermediate principal stress /
- strength /
- internal friction angle

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参考文献(19)

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