次加载面理论及其在土体循环塑性模型中的应用

The subloading surface theory and its application to the cyclic plastic model for soil

简要介绍了次加载面理论的基本思想、假设及其物理解释.开创性地把次加载面理论与广义塑性力学相结合,把常规的椭圆 抛物线双屈服面模型扩展为次加载面循环塑性模型,并通过多种应力路径下土体本构响应的模拟,表明次加载面循环塑性模型能较好地反映循环荷载作用下土体呈现出的非线性、滞回性与变形的积累性三方面的主要特征,初步验证了模型的有效性.

The fundamental ideas, assumptions, and their physical interpretations of subloading surface theory are introduce here. The subloading surface theory and the generalized plastic mechanics are combined for the first time, then enlarges the normal ellipseparabola twoyieldsurface model to a new one of subloading surface cyclic plastic. The new model's application and validity of the constitutive equation to predict the real cyclic loading behavior of soil, including Massing effect and ratcheting effect, is verified by modeling the constitutive response of soil under several stress paths.