| 剪切带-弹性岩体系统的稳定及失稳滑动理论研究 |
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| 引用本文： | 王学滨,潘一山,马瑾.剪切带-弹性岩体系统的稳定及失稳滑动理论研究[J].岩土工程学报,2002,24(3):360-362. |
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| 作者姓名： | 王学滨 潘一山 马瑾 |
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| 作者单位： | 辽宁工程技术大学力学系；中国地震局地质研究所 辽宁阜新123000；辽宁阜新123000；中国地震局地质研究所；北京100029； |
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| 基金项目： | 中国地震局地质所构造物理开放实验室资助项目(LTP0 0 0 3)，辽宁工程技术大学基金项目 (0 2 - 4 8) |
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| 摘 要： | 首次应用应变梯度塑性理论对剪切带 -弹性岩体的稳定及失稳滑动进行了理论分析 ,得到了剪应力与剪切带上、下盘相对错动位移的理论关系 ,提出了采用软化段剪应力 -相对错动位移的斜率来评价系统稳定性的方法。研究结果表明 :剪切带上、下盘弹性岩石宽度越大 ,岩石材料剪切带宽度 (或内部长度 )越小 ,剪切弹性模量越小及降模量越大系统越不稳定 ;试验机剪切模量越小 ,岩样 -试验机系统越容易失稳
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| 关 键 词： | 应变梯度 应变局部化 剪切带 失稳 滑动 |
| 文章编号： | 1000-4548(2002)03-0360-03 |
| 修稿时间： | 2001年9月17日 |
Theoretical analysis of stability and unstable sliding of the system composed of shear band and elastic rock |
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| WANG Xuebin,PAN Yishan,MA Jin.Theoretical analysis of stability and unstable sliding of the system composed of shear band and elastic rock[J].Chinese Journal of Geotechnical Engineering,2002,24(3):360-362. |
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| Authors: | WANG Xuebin PAN Yishan MA Jin |
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| Affiliation: | 1.Dept. of Mechanics and Engineering Sciences Liaoning Technical University Fuxin 123000 China 2.Institute of Geology China Seismological Bureau Beijing 100029 China |
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| Abstract: | Based upon strain gradient plasticity theory, in the first time,a theoretical analysis of stability and unstable sliding of the system composed of shear band and elastic rock mass is conducted. The relation between the shear stress and the relative sliding displacement of the shear band is got. In the strain softening stage, the slope of shear stress-relative sliding displacement can be used to assess the stability of the system.The results obtained show that if the width of elastic zone outside the shear band is large and the width of the shearing bands (or the internal length of rock material) is small,and if the descending modulus is high and the shear elastic modulus is low, then the stability of the system is bad.Lower shear modulus of test machine can lead to instability of the system. |
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| Keywords: | strain gradient strain localization shear band instability slide |
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