非饱和土本构关系及变形计算

Constitutive relations and deformation calculation for unsaturated soils

总结了非饱和土本构模型当前研究的新进展,包括弹性模型、巴塞罗那模型的各种改进,其它形式包含吸力的应力变量模型、膨胀土弹塑性模型、损伤力学模型、热力学模型、浸水变形计算模型等。同时总结了这些模型用于有限元计算时所要解决的问题,包括吸力的确定、矩阵的形成等。

The state of the art in the constitutive relations for unsaturated soils was summarized, including elastic models, Barcelona elastic-plastic model and its various modified forms, models using suction as stress variables, elastic-plastic models for expansive soils, damage models, thermo-mechanical models and models for wetting induced deformation. The problems related to the implementation of these models in the finite element analysis were also presented, including determination of suction and matrix formulation.