岩土力学2012，Vol.33Issue(11)：3263-3270,8.
非饱和土毛细滞回与变形耦合弹塑性本构模型
An elastoplastic constitutive model of unsaturated soils with capillary hysteresis and deformation coupling
摘要
Abstract
An elastoplastic constitutive model of unsaturated soils with capillary hysteresis and skeletal deformation coupling, is developed based on the modified Cam clay model. The new model considers the effects of matric suction and saturation on the yield stress, and can be used to describe simultaneously the elastoplastic deformation and capillary hysteresis of unsaturated soils. Based on the fact that the entry air value increases with plastic volume deformation, a formulation is developed to describe the effect of deformation on the soil-water characteristic curve. The new model can account for the effect of saturation on the prophase yield stress, properly represent the difference of soil strength under different soil-water states, and effectively describe the effect of drying/wetting history on the skeletal deformation. The simulations are compared to the experimental data available in the literature. It is shown that the new model can simulate the main mechanical features of unsaturated soil behavior.关键词
非饱和土/毛细滞回与变形耦合/弹塑性本构模型Key words
unsaturated soil/ capillary hysteresis and deformation coupling/ elastoplastic constitutive model分类
建筑与水利引用本文复制引用
马田田,韦昌富,陈盼,魏厚振,伊盼盼..非饱和土毛细滞回与变形耦合弹塑性本构模型[J].岩土力学,2012,33(11):3263-3270,8.基金项目
国家自然科学基金(No.10872211) （No.10872211）
中国科学院"百人计划"择优项目 （）
中国科学院方向性项目(No.kzcxz-yw-150) （No.kzcxz-yw-150）
广西自然科学基金(No.2011GXNSFE018004). （No.2011GXNSFE018004）
