NUMERICAL IMPLEMENTATION OF AN ELASTOPLASTIC MODEL FOR UNSATURATED SOILS

被引:0
作者
Gonzalez, Nubia A. [1 ]
Gens, Antonio [1 ]
机构
[1] Univ Politecn Cataluna, Dept Geotech Engn & Geosci, ES-08034 Barcelona, Spain
来源
COMPUTATIONAL PLASTICITY XI: FUNDAMENTALS AND APPLICATIONS | 2011年
关键词
Unsaturated soils; constitutive model; integration algorithm; elastoplasticity; stress variables;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper describes some issues related to the numerical implementation of a constitutive model for unsaturated soils based on the BBM [1]. The focus of the paper is on the stress variables used and on the numerical algorithms adopted. Conventional stress variable approach (net stress and suction) as well as the approach that takes into account the degree of saturation (Bishop's stress and suction) are examined. To solve the constitutive stress-strain equations, two stress integration procedures have been implemented, an explicit stress integration scheme with automatic substepping and error control techniques [2] and a fully implicit stress integration scheme based on the Backward-Euler algorithm with substepping [3]. Their performances during the integration of the constitutive laws are compared.
引用
收藏
页码:1255 / 1262
页数:8
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