摘要
简要介绍广泛应用的非饱和土Alonso模型的原理与发展,并通过3组共7个试样的非饱和土三轴试验,得到模型的11个参数。在饱和土Cam本构关系的基础上,推导出一个基于非饱和土Alonso模型的应力-应变增量方程的计算公式,该方程与饱和土的本构方程形式相同。编制了能够考虑净应力和吸力二者对土体硬化规律影响的有限元程序,从而为非饱和土弹塑性计算提供一条途径,便于进一步应用于实际工程。
An elastoplastic critical state-based framework for describing the constitutive behavior of unsaturated soils are presented and briefly discussed.Base on the model,eleven model parameters were ascertained after seven laboratory tests on unsaturated soils.Then a revised elastoplastic incremental stiffness matrix for unsaturated soil is deducted;and it has a same form with that of saturated soils.Finally,a program has been workout which can consider the affection of mean stress and suction on soil hardening l...
出处
《岩土力学》
EI
CSCD
北大核心
2009年第2期542-546,共5页
Rock and Soil Mechanics
基金
国家自然科学基金重点项目(No.50839004)
面上项目(No.50879044)
