非饱和土弹塑性应力应变特性模拟

Elasto-Plastic Modelling for the Stress and Strain Behaviour of Unsaturated Soils

简单地回顾了非饱和土应力应变本构模型的研究概况，就非饱和膨胀性土、黄土和击实土等的变形特性作简介。在此基础上，根据硬化塑性理论和临界状态概念，提出了一个描述非饱和土应力应变特性的一般本构理论框架。该理论框架包含了几个不同的模型。

In this paper a review of the constitutive models for unsaturated soils reported in the literature is brieflypresented first.The paper follows with a summary of some main aspects conceming the deformation behaviour forusaturated soils including expansive soils,loess and compacted soils,Batal on hardening plasticity theory and criticalstate concepts,the paper presents a general theoretical constitutive framework including several models for describingthe stress-strain behaviour of unsaturated soils.The framework is able to represent,in a consistent and unifiedmanner,many of the fundamental features of the behaviour of unsaturated soils,The results of laboratory tests on aclayey sand and a sandy clay are used to evaluate the ability of the models to reproduce,quantitatively,observedbehaviour The agreement between observed and computed results is considered satisfactory and confirms thepossibilities of reproducing the most imporiant features of unsaturated soil behaviour using a simple generalframework.