【摘要】 在边界面塑性理论的基础上,利用Dafalias的径向映射概念,提出了一个可以描述天然状态结构性软黏土力学特性的各向同性硬化弹塑性模型。在本构方程中引入一组适当的标量形式的硬化变量,从而将黏土结构损伤与累积塑性应变发展联系起来。所提出的模型比Rouainia和MuirWood提出的基于运动硬化准则的边界面模型更简便实用。通过与一维压缩试验以及三轴不排水剪切试验结果的比较,表明这种模型能够较好地模拟天然结构性软黏土的受力特性。更多还原

【Abstract】 An isotropic hardening model for describing natural soft clay with structural damage is proposed. The effect of damage to structure caused by accumulated plastic strain is modeled with a set of scalar variables introduced into the corresponding equations linking the structure degradation with the accumulated plastic strain. The mapping rule is adopted in order to evaluate the plastic modulus inside the boundary surface. The validity of the model is verified by experimental data of 1-D compression test and undrained triaxial shear test.更多还原