| 土体应变局部化现象的理论解析 |
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| 引用本文： | 钱建固,黄茂松.土体应变局部化现象的理论解析[J].岩土力学,2005,26(3):432-436. |
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| 作者姓名： | 钱建固 黄茂松 |
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| 作者单位： | 1. 同济大学 地下建筑与工程系，上海 200092；2. 中国科学院武汉岩土力学研究所 岩土力学重点实验室，湖北 武汉430071 |
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| 基金项目： | 国家自然科学基金资助项目(No.10402029,50179025)，中科院武汉岩土力学研究所岩土力学重点实验室资助课题(No. Z110401)。 |
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| 摘 要： | 引起土体失稳的应变局部化现象是在特定应力状态下，土体本构产生的分叉特性。基于有限变形理论推导了应变局部化产生的三维解析解。基于应变局部化的理论解析，分析了轴对称和平面应变条件下应变局部化现象在弹塑性硬化阶段的存在性以及剪切带的方向性。 理论分析表明，在轴对称条件下，土体应变局部化产生于土体应力-应变的软化阶段，而平面应变条件下，土体应变局部化一般出现在应力-应变的硬化阶段，其剪切带方向角的理论预测与Arthur等1]建议值较为一致。
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| 关 键 词： | 应变局部化 分叉 剪切带 |
| 文章编号： | 1000-7598-(2005)03-0432-05 |
| 收稿时间： | 2003-11-23 |
| 修稿时间： | 2003年11月23 |
An analytical solution for criterion of onset of strain localization of soils |
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| QIAN Jian-gu,HUANG Mao-song.An analytical solution for criterion of onset of strain localization of soils[J].Rock and Soil Mechanics,2005,26(3):432-436. |
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| Authors: | QIAN Jian-gu HUANG Mao-song |
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| Institution: | 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China 2. Key Laboratory of Rock and Soil Mechanics, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
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| Abstract: | Strain localization of soils as a stable behavior of soils can be understood as a bifurcation in the macroscopic constitutive properties in a special stress state. In this paper, a 3-D analytical solution for the criterion of onset of strain localization is deduced based on the finite deformation theory. The theoretical analysis shows that, onset of strain localization always occurs in the softening regime of constitutive response under axisymmetric conditions; and inception of strain localization generally occurs in the hardening regime under plane strain conditions, and shear bands’ orientation of theoretical prediction exhibits an agreement with that suggested by Arthur et al1]. |
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| Keywords: | strain localization bifurcation shear band |
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