| 平面应变条件下M-C材料屈服时的中主应力公式 |
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| 引用本文： | 邓楚键,郑颖人,朱建凯.平面应变条件下M-C材料屈服时的中主应力公式[J].岩土力学,2008,29(2):310-314. |
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| 作者姓名： | 邓楚键 郑颖人 朱建凯 |
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| 作者单位： | 后勤工程学院，重庆 400041 |
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| 基金项目： | 后勤工程学院青年科研基金 |
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| 摘 要： | 基于Mohr-Coulomb准则，通过引入罗德角参数及Mohr-Coulomb准则平面应变等效广义Mises准则，推导了平面应变条件下材料屈服时的中主应力公式，并给出其与基于SMP准则（Spatial Mobiliaztion Piane）的平面应变中主应力公式之间的关系式。对平面应变条件下的条形地基进行了有限元数值模拟，计算结果验证了所推导的平面应变条件下M-C材料屈服时的中主应力公式的正确性，其公式为岩土体的强度和变形分析、中主应力的强度效应的进一步研究，以及Mohr-Coulomb准则的修正提供了有力的基础。
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| 关 键 词： | Mohr-Coulomb准则 罗德角参数 中主应力公式 SMP准则 有限元 |
| 文章编号： | 1000-7598-（2008）02-310-05 |
| 收稿时间： | 2006-08-02 |
| 修稿时间： | 2006年8月2日 |
Formula of intermediate principal stress at failure for Mohr-Coulomb material in plane strain state |
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| DENG Chu-jian,ZHENG Ying-ren,ZHU Jian-kai.Formula of intermediate principal stress at failure for Mohr-Coulomb material in plane strain state[J].Rock and Soil Mechanics,2008,29(2):310-314. |
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| Authors: | DENG Chu-jian ZHENG Ying-ren ZHU Jian-kai |
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| Institution: | Logistical Engineering University, Chongqing, 400041, China |
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| Abstract: | Based on Mohr-Coulomb yield criterion, the Formula of Intermediate principal stress at failure of Mohr-Coulomb material in plane strain state was obtained by analyzing the Lode angle parameter and the general Mises yield criterion matched Mohr-Coulomb yield criterion in plane strain state, which helps to study the strain-stress of geotechnical materials and the strength effect of intermediate principal stress and also helps to modify Mohr-Coulomb yield criterion. Second, the relation of intermediate principal stress at failure in plane strain state between Mohr-Coulomb material and SMP material is put forward. Finally, a foundation under plane strain condition was analyzed by FEM; and the computational results shows that the formula is correct. |
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| Keywords: | Mohr-Coulomb yield criterion lode angle parameter formula of intermediate principal stress SMP criterion FEM |
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