非饱和土本构模型研究进展

总结了非饱和土本构模型的研究历史和现状,介绍了非饱和土的各类模型,包括弹塑性模型、广义吸力模型、损伤模型、基于热力学的混合物理论模型.把弹塑性模型分成3个部分进行了介绍:未考虑饱和度影响,考虑饱和度影响但未考虑滞后现象和考虑滞后现象.并介绍了利用热力学和混合物理论建立非饱和土本构模型的新方法,指出了目前非饱和土本构模型研究中存在的问题,给出了今后可能的发展趋势.

Research Progress of Constitutive Models for Unsaturated Soils

The paper summarizes various models adapted to unsaturated soils,including elasto-plastic models, damage models,generalized suction models,thermodynamical models and models based on theory of mixtures.The elastoplastic models in the paper are categorized into three parts:Models that do not consider the influence of degree of saturation;Models that consider the influence of degree of saturation but not hysteresis;Models that consider hysteresis.Some new methods of developing constitutive models for unsaturated soils using thermomechanics and mixture theory are introduced.Some advices on the development of constitutive models for unsaturated soils are given in the end.