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| STRUCTURAL DAMAGE MODEL OF UNSATURATED EXPANSIVE SOIL AND ITS APPLICATION IN MULTI-FIELD COUPLE ANALYSIS ON EXPANSIVE SOIL SLOPE | |
| 作者姓名： | 卢再华 陈正汉 方祥位 郭剑峰 周海清 |
| 作者单位： | Logistic Engineering University Chongqing 400041 P. R. China Navy University of Engineering Wuhan 430033 P. R. China，Logistic Engineering University Chongqing 400041 P. R. China，Key Laboratory for the Exploitation of Southwestern Resources and the Environmental Disaster Control Engineering，Ministry of Education，Chongqing University Chongqing 400044 P. R. China，Logistic Engineering University Chongqing 400041 P. R. China，Logistic Engineering University Chongqing 400041 P. R. China，Logistic Engineering University Chongqing 400041 P. R. China |
| 摘 要： | Focused on the sensitivity to climate change and the special mechanical characteristics of undisturbed expansive soil, an elastc-plastic damage constitutive model was proposed based on the mechanics of unsaturated soil and the mechanics of damage. Undisturbed expansive soil was considered as a compound of non-damaged part and damaged part. The behavior of the non-damaged part was described using non-linear constitutive model of unsaturated soil. The property of the damaged part was described using a damage evolution equation and two yield surfaces, i.e., loading yield (LY) and shear yield (SY). Furthermore, a consolidation model for unsaturated undisturbed expansive soil was established and a FEM program named UESEPDC was designed. Numerical analysis on solid-liquid-gas tri-phases and multi-field couple problem was conducted for four stages and fields of stress, displacement, pore water pressure, pore air pressure, water content, suction, and the damage region as well as plastic region in an expansive soil slope were obtained. |
| 关 键 词： | 弹粘塑料损伤构成模型 固结 蒸发 数字分析 |
| 收稿时间： | 2005-12-07 |
| 修稿时间： | 2006-04-11 |
Structural damage model of unsaturated expansive soil and its application in multi-field couple analysis on expansive soil slope |
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| Zai-hua Lu,Zheng-han Chen Doctor,Xiang-wei Fang,Jian-feng Guo,Hai-qing Zhou.STRUCTURAL DAMAGE MODEL OF UNSATURATED EXPANSIVE SOIL AND ITS APPLICATION IN MULTI-FIELD COUPLE ANALYSIS ON EXPANSIVE SOIL SLOPE[J].Applied Mathematics and Mechanics(English Edition),2006,27(7):891-900. | |
| Authors: | Zai-hua Lu Zheng-han Chen Doctor Xiang-wei Fang Jian-feng Guo Hai-qing Zhou |
| Affiliation: | 1. Logistic Engineering Univers ity, Chongqing 400041, P. R. China;Navy University of Engineering, Wuhan 430033, P. R. China 2. Logistic Engineering Univers ity, Chongqing 400041, P. R. China;Key Laboratory for the Exploitation of Southwestern Resources and the Environmental Disaster Control Engineering, Ministry of Education,Chongqing University, Chongqing 400044, P. R. China 3. Logistic Engineering Univers ity, Chongqing 400041, P. R. China |
| Abstract: | Focused on the sensitivity to climate change and the special mechanical characteristics of undisturbed expansive soil, an elastc-plastic damage constitutive model was proposed based on the mechanics of unsaturated soil and the mechanics of damage. Undisturbed expansive soil was considered as a compound of non-damaged part and damaged part. The behavior of the non-damaged part was described using non-linear constitutive model of unsaturated soil. The property of the damaged part was described using a damage evolution equation and two yield surfaces, i.e., loading yield (LY) and shear yield (SY). Furthermore, a consolidation model for unsaturated undisturbed expansive soil was established and a FEM program named UESEPDC was designed. Numerical analysis on solid-liquid-gas tri-phases and multi-field couple problem was conducted for four stages and fields of stress, displacement, pore water pressure, pore air pressure, water content, suction, and the damage region as well as plastic region in an expansive soil slope were obtained. |
| Keywords: | unsaturated expansive soil elasto-plastic damage constitutive model consolidation soil slope raining evaporating numerical analysis |
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