Structural Damage Model of Unsaturated Expansive Soil and Its Application in Multi-Field Couple Analysis on Expansive Soil Slope

LU Zai-hua; CHEN Zheng-han; FANG Xiang-wei; GUO Jian-feng; ZHOU Hai-qing

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Article Navigation > Applied Mathematics and Mechanics > 2006 > 27(7): 781-788

LU Zai-hua, CHEN Zheng-han, FANG Xiang-wei, GUO Jian-feng, ZHOU Hai-qing. Structural Damage Model of Unsaturated Expansive Soil and Its Application in Multi-Field Couple Analysis on Expansive Soil Slope[J]. Applied Mathematics and Mechanics, 2006, 27(7): 781-788.

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Structural Damage Model of Unsaturated Expansive Soil and Its Application in Multi-Field Couple Analysis on Expansive Soil Slope

1.
Department of Construction Engineering, Logistic Engineering University, Chongqing 400041, P. R. China;

Received Date: 2005-12-07
Rev Recd Date: 2006-04-11
Publish Date: 2006-07-15

Abstract

Abstract

Focused on the sensitivity to climate change and the special mechanical characteristics of undisturbed expansive soil, an elasto-plastic damage constitutive model were proposed based on the mechanics of unsaturated soil and the mechanics of damage. Undisturbed expansive soil was considered as a compound of non-damage 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 and shear yield. Further more, a consolidation model for unsaturated undisturbed expansive soil was established and a FEM program named UESEPDC was designed. Numerical analysis on solid-liquid-gas triphases and multi-field couple problem was conducted for four stages and the fields of stress, displacement, pore water pressure, pore air pressure, water content and suction in an expansive soil slope were obtained.
- unsaturated expansive soil,
- elasto-plastic damage constitutive model,
- consolidation,
- soil slope,
- raining,
- evaporating,
- numerical analysis

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References(12)

References

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