›› 2009, Vol. 30 ›› Issue (2): 542-546.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Elastoplastic constitutive model parameters of unsaturated soils and its finite element methods

CHEN Yong 1, 2, LIU De-fu2, WANG Shi-mei 1, 2   

  1. 1. School of Water Resources and Hydropower, Wuhan University, Wuhan 430072, China; 2. Key Laboratory of Geological Hazards of Three Gorges Reservoir Area of Ministry of Education, China Three Gorges University, Yichang 443002, China
  • Received:2007-04-10 Online:2009-02-10 Published:2011-01-27

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Abstract:

An elastoplastic critical state-based framework for describing the constitutive behavior of unsaturated soils are presented and briefly discussed. Base on the model, eleven model parameters were ascertained after seven laboratory tests on unsaturated soils. Then a revised elastoplastic incremental stiffness matrix for unsaturated soil is deducted; and it has a same form with that of saturated soils. Finally, a program has been workout which can consider the affection of mean stress and suction on soil hardening laws. As a consequence, a new method is proposed for analyzing the elastoplastic problem of unsaturated soil.

Key words: unsaturated soils, Alonso’s model, hardening laws, finite element analysis

CLC Number: 

  • TU 411
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