Finite element analysis of strain localization of cohesive soils considering strength anisotropy

被引：0
|
作者：
Tang H. [1 ]
Wei W. [1 ]
Lin R. [1 ]
机构：
[1] State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, 116024, Liaoning
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2019年 / 38卷 / 07期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Anisotropy; Cohesive soil; Cosserat continuum theory; Microstructure; Soil mechanics; Strain localization;
D O I：
10.13722/j.cnki.jrme.2019.0031
中图分类号：
学科分类号：
摘要：
Aiming at the problems of strength anisotropy and strain localization of cohesive soils, Pietruszczak's method considering microstructure tensor combined with stress invariance was developed to analyze the cohesion anisotropy of cohesive soils and introduced into Drucker-Prager constitutive model based on Cosserat continuum theory to realize dynamically updating of the cohesion with the change of the stress state. The relevant formulas were derived and the numerical implementation was carried out by means of the secondary development function of the finite element software-ABAQUS. The reliability and effectiveness of the numerical method developed in this paper were verified by comparison with the experimental results. Examples of uniaxial compression and passive failure of the retaining wall under plane strain condition were illustrated, and the reasonable values of the cohesion under different working conditions were proposed. It is shown that the cohesion anisotropy has an important influence on bearing capacity and deformation. Comparison with the calculation results by the classical continuum model indicates that the developed numerical model considering the strength anisotropy based on the Cosserat continuum theory can overcome the ill-posedness of mesh sensitivity and maintain the well-posedness of the strain localization problem. © 2019, Science Press. All right reserved.
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页码：1485 / 1497
页数：12
相关论文
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