›› 2009, Vol. 30 ›› Issue (S2): 114-118.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Damage model of unsaturated soil and its application

LI Xiang-dong, LUO Xiao-hui   

  1. College of Civil Engineering and Mechanics, Huazhong University of Science & Technology, Wuhan 430074, China
  • Received:2009-08-17 Online:2009-08-10 Published:2011-06-21

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Abstract:

The effective stress ( –ua) and the matric suction (ua?–uw) are regarded as variable of state to describe the stress state of unsaturated soil; so its Mohr-Coulomb shear failure plane is a curved face (usually assumpted as plane face) in three-dimensional system of coordinate that is made up by effective stress, matric suction and shear stress. The damage variable of unsaturated soil is defined based on equivalent strain principle. In light of triaxial test, the relationship between damage variable and deviatoric stress is fitted; and the relationship between damage threshold stress and matric suction is shown as the exponential function. As an example, method of stabilization numerical analysis for a slope of unsaturated soil is given.

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  • TU 441
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