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《Journal of Zhejiang University(Engineering Science)》 2010-04
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Elasto-plastic damage constitutive model and its application to structural soft soil

LI Jin-zhu,ZHU Xiang-rong,LIU Yong-hai(MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Zhejiang University,Hangzhou 310058,China)  
Structural damage variable was introduced to consider the effect of structural property on the engineering characteristic of soft soil.An extended elasto-plastic damage model was established on the basis of soil damage mechanics theory and the classic modified Cambridge model.The model parameters were determined through consolidation test and triaxial test.The UMAT subroutine of the elasto-plastic damage model was developed on the platform of ABAQUS.Finally,the elasto-plastic damage model was applied in the numerical simulation of laboratory consolidation test and in-situ preloading test,and the results were compared with those of the modified Cambridge model.The results showed that the settlement computed by the elasto-plastic damage model is less than that of the modified Cambridge model when the load is low,but it is opposite when the load exceeds the structured yield stress,which indicates that the elasto-plastic damage model can reflect the structural property of soft soil.
【CateGory Index】: TU411
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