A combined two-surface elastoplastic model for hydro-mechanical coupling behavior of unsaturated cohesive soils

被引：0

作者：

Li X. ^{[1
,2
]}

Li T. ^{[3
]}

机构：

[1] Yellow River Engineering Consulting Co., Ltd., Henan, Zhengzhou

[2] Post-Doctoral Station of Yellow River Engineering Consulting Co., Ltd., Henan, Zhengzhou

[3] School of Civil Engineering, Beijing Jiaotong University, Beijing

来源：

Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2023年 / 42卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

elastoplastic two-surface model; hardening criterion; hydro-mechanical; matric suction; soil mechanics; unsaturated soils;

D O I：

10.13722/j.cnki.jrme.2022.0743

中图分类号：

学科分类号：

摘要：

Complex hydro-mechanical coupling properties of unsaturated cohesive soils appear under external loading. In this paper, an elastoplastic two-surface model which can describe the hydro-mechanical coupling character has been formulated based on elastoplastic theory, adapting the suggested plastic hardening criterion extended to unsaturated soils, considering the arbitrary stress path variation in the (p'-q-s) space. The model reflects the coupling effect of stress and suction through mean skeleton stress and modified suction. Two groups of loading surfaces and bounding surfaces were used to describe the plastic yield induced by coupled hydro-mechanical during loading and/or dry-wetting processes respectively. The fully coupled description and solution of the hydro-mechanical characteristics of unsaturated clay are realized. Compared with the conventional triaxial shear test results of unsaturated clay, the model can better simulate the stress-strain characteristics of unsaturated clay under coupled hydro-mechanical. © 2023 Academia Sinica. All rights reserved.

引用

页码：3654 / 3662

页数：8

共 25 条

[1]

GENS A, ALONSO E E., A framework for the behaviour of unsaturated expansive clays[J], Canadian Geotechnical Journal, 29, 6, pp. 1013-1032, (1992)

[2]

CUI Y J, DELAGE P, SULTAIN N., An elasto-plastic model for compacted soils[C], Proceedings of the 1st International Conference on Unsaturated Soils, 2, pp. 703-709, (1995)

[3]

CHEN Zhenghan, On basic theories of unsaturated soils and special soils[J], Chinese Journal of Geotechnical Engineering, 36, 2, pp. 201-272, (2014)

[4]

ALONSO E E, GENS A, JOSA A., A constitutive model for partially saturated soil[J], Geotechnique, 40, 3, pp. 405-430, (1990)

[5]

WHEELER S J, SIVAKUMAR V., An elasto-plastic critical state framework for unsaturated soil[J], Geotechnique, 45, 1, pp. 35-53, (1995)

[6]

SUN D, MATSUOKA H, YAO Y, Et al., An elasto-plastic model for unsaturated soil in three-dimensional stresses[J], Soils and Foundations, 40, 3, pp. 17-28, (2000)

[7]

MARTI L C, SANCHEZ M, WHEELER S J., Formulation of a three-dimensional constitutive model for unsaturated soils incorporating mechanical-water retention couplings[J], International Journal for Numerical and Analytical Methods in Geomechanics, 37, 17, pp. 3008-3035, (2013)

[8]

RAVEENDIRARAJ A., Coupling of mechanical behaviour and water retention behaviour in unsaturated soils, (2009)

[9]

VAN GENUCHTEN M T., A closed form equation for predicting the hydraulic conductivity of unsaturated soils[J], Soil Science Society of America Journal, 44, pp. 892-898, (1980)

[10]

FREDLUND D G, XING A., Equations for the soil-water characteristic curve[J], Canadian Geotechnical Journal, 31, 4, pp. 521-532, (1994)

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