| 天然状态结构性软黏土的边界面弹塑性模型 |
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| 引用本文： | 黄茂松,钟辉虹,李永盛. 天然状态结构性软黏土的边界面弹塑性模型[J]. 水利学报, 2003, 34(12): 0047-0052 |
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| 作者姓名： | 黄茂松 钟辉虹 李永盛 |
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| 作者单位： | 同济大学,地下建筑与工程系,上海200092 |
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| 基金项目： | 国家自然科学基金资助项目(10272083)，教育部科学技术研究重点项目(01073)，上海市曙光计划项目(02SG17) |
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| 摘 要： | 在边界面塑性理论的基础上，利用Dafalias的径向映射概念，提出了一个可以描述天然状态结构性软黏土力学特性的各向同性硬化弹塑性模型。在本构方程中引入一组适当的标量形式的硬化变量，从而将黏土结构损伤与累积塑性应变发展联系起来。所提出的模型比Rouainia和Muir Wood提出的基于运动硬化准则的边界面模型更简便实用。通过与一维压缩试验以及三轴不排水剪切试验结果的比较，表明这种模型能够较好地模拟天然结构性软黏土的受力特性。
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| 关 键 词： | 天然软黏土；结构性；边界面塑性；本构模型；试验验证 |
| 文章编号： | 0559-9350(2003)12-0047-06 |
| 修稿时间： | 2002-09-24 |
Elasto-plastic boundary surface model for natural soft clay with structural damage |
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| HUANG Maosong. Elasto-plastic boundary surface model for natural soft clay with structural damage[J]. Journal of Hydraulic Engineering, 2003, 34(12): 0047-0052 |
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| Authors: | HUANG Maosong |
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| Affiliation: | Department of Geotechmical Engineering Tongji University, Shanghai 200092,China |
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| Abstract: | An isotropic hardening model for describing natural soft clay with structural damage is proposed. The effect of damage to structure caused by accumulated plastic strain is modeled with a set of scalar variables introduced into the corresponding equations linking the structure degradation with the accumulated plastic strain. The mapping rule is adopted in order to evaluate the plastic modulus inside the boundary surface. The validity of the model is verified by experimental data of 1-D compression test and undrained triaxial shear test. |
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| Keywords: | natural soft clay soil structure elasto-plastic boundary surface constitutive model experiment verification |
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