| 结构面剪切特性的试验与数值模拟分析 |
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| 引用本文： | 周莲君,彭振斌,何忠明,彭文祥.结构面剪切特性的试验与数值模拟分析[J].科技导报(北京),2009,27(4). |
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| 作者姓名： | 周莲君 彭振斌 何忠明 彭文祥 |
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| 作者单位： | 周莲君,ZHOU Lianjun(中南大学地学与环境工程学院,长沙,410083;中南大学湖南中大设计院有限公司,长沙,410075);彭振斌,彭文祥,PENG Zhenbin,PENG Wenxiang(中南大学地学与环境工程学院,长沙,410083);何忠明,HE Zhongming(中南大学资源与安全工程学院,长沙,410083)
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| 基金项目： | 中南大学博士后科学基金，湖南省交通厅科研项目 |
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| 摘 要： | 结构面的性质对岩体工程稳定性具有重要意义,通过室内试验和数值模拟,分析了结构面在直剪条件下的应力和变形特征,得到:①直剪试验过程中.剪力一剪切位移之间的关系逐渐从线性关系转化为非线性关系;当剪应力将要达到峰值剪切强度时,切向位移突然增大,岩体已开始沿结构面剪坏;②试样剪切强度与正应力之间符合Mohr-Coulomb线性关系;数值计算得到的应力应变关系与室内试验得到的结果相同,说明了数值试验的可靠性;③结构面剪应力的分布从结构面施加切向位移速率的一端向另一端逐渐增大:④随着法向应力的增大,最大剪应力分布区域基本上没有变化,说明法向力的大小对结构面剪应力的分布影响较小:并且根据Mohr-Coulomb理论.正应力在结构面上的分布情况类似于剪切力的分布情况.
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| 关 键 词： | 结构面 剪切特性 数值分析 |
Test for Shear Characteristics of Structural Plane and Its Numerical Simulation Analysis |
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| ZHOU Lianjun,PENG Zhenbin,HE Zhongming,PENG Wenxiang . College of Geoscience , Environment Engineering,Central South University,Changsha ,China . Zhongda Survey , Design Institute of Hunan,Changsha ,China . School of Resources , Safety Engineering,China.Test for Shear Characteristics of Structural Plane and Its Numerical Simulation Analysis[J].Science & Technology Review,2009,27(4). |
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| Authors: | ZHOU Lianjun PENG Zhenbin HE Zhongming PENG Wenxiang College of Geoscience Environment Engineering Central South University Changsha China Zhongda Survey Design Institute of Hunan Changsha China School of Resources Safety Engineering China |
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| Institution: | ZHOU Lianjun1,2,PENG Zhenbin1,HE Zhongming3,PENG Wenxiang1 1. College of Geoscience , Environment Engineering,Central South University,Changsha 410083,China 2. Zhongda Survey , Design Institute of Hunan,Changsha 410075,China 3. School of Resources , Safety Engineering,China |
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| Abstract: | The characteristics of structural plane are very important to the stability of rock mass. In this paper, the stress and deformation characteristics of structural plane under direct shear conditions are analyzed based on laboratory tests and numerical simulations. It is shown that, (1) during the process of direct shearing, the relationship between shear stress and shear displacement changes from the linear form to a nonlinear form; after the shear stress of structure plane reaches the peak magnitude of shea... |
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| Keywords: | structure plane shear characteristic numerical analysis |
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