Study of the dynamic elastoplastic constitutive model for unsaturated soil

被引：0

作者：

Wang Jun-min ^{[1
]}

Xiong Yong-lin ^{[1
]}

Yang Qi-lai ^{[1
]}

Sang Qin-yang ^{[1
]}

Huang Qiang ^{[1
]}

机构：

[1] Ningbo Univ, Inst Geotech Engn, Ningbo 315211, Zhejiang, Peoples R China

来源：

ROCK AND SOIL MECHANICS | 2019年 / 40卷 / 06期

基金：

中国国家自然科学基金;

关键词：

elastoplasticity; constitutive model; unsaturated soil; liquefaction; STRESS; LIQUEFACTION; SAND;

D O I：

10.16285/j.rsm.2018.1778

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The anisotropic elastoplastic constitutive model of saturated soil is extended to describe the mechanical properties of the unsaturated soil by using the degree of saturation and effective stress as the state variables. Through the theoretical simulation of the existing dynamic triaxial tests of the unsaturated soils under completely undrained conditions, the correctness of the proposed constitutive model of unsaturated soils is verified. Finally, based on the proposed constitutive model, the influence of initial saturation on the dynamic mechanical behavior of unsaturated soil is discussed under the undrained condition. The results show that the void ratio of unsaturated soil will reduce under the dynamic loading, which will result in the increase of saturation. When the initial saturation is high, the unsaturated soil will be converted to saturated soil, and the liquefaction will happen. The research results obtained in this paper are of great significance to study the mechanical behavior of unsaturated soils under dynamic loads such as earthquakes.

引用

页码：2323 / 2331

页数：9

共 23 条

[1] An elasto-plastic description of two distinct volume change mechanisms of soils [J].

Asaoka, A ;

Noda, T ;

Yamada, E ;

Kaneda, K ;

Nakano, M .

SOILS AND FOUNDATIONS, 2002, 42 (05) :47-57

[2]

[陈国兴 Chen Guoxing], 2015, [岩土工程学报, Chinese Journal of Geotechnical Engineering], V37, P2140

[3]

[陈顒 Chen Yong], 2005, [灾害学, Journal of Catastrophology], V20, P1

[4]

Chu F, 2014, Chinese Journal of Rock Mechanics and Engineering, V33, P3299

[5] Undrained behaviour of near-saturated sand in cyclic and monotonic loading [J].

Ishihara, K ;

Tsukamoto, Y ;

Kamada, K .

CYCLIC BEHAVIOUR OF SOILS AND LIQUEFACTION PHENOMENA, 2004, :27-39

[6]

Kato S, 2001, SOILS FOUND, V41, P1

[7]

Kazama M., 2006, Journal of Geotechnical Engineering, Japan Society of Civil Engineers, V62, P546

[8]

Kazama M., 2000, SOILS FOUND, V40, P47, DOI [10.3208/sandf.40.6_47, DOI 10.3208/SANDF.40.6_47]

[9] A fully coupled flow deformation model for cyclic analysis of unsaturated soils including hydraulic and mechanical hystereses [J].

Khalili, N. ;

Habte, M. A. ;

Zargarbashi, S. .

COMPUTERS AND GEOTECHNICS, 2008, 35 (06) :872-889

[10] Maps of soil subsidence for Tokyo bay shore areas liquefied in the March 11th, 2011 off the Pacific Coast of Tohoku Earthquake [J].

Konagai, Kazuo ;

Kiyota, Takashi ;

Suyama, Shota ;

Asakura, Toru ;

Shibuya, Kenichi ;

Eto, Chikako .

SOIL DYNAMICS AND EARTHQUAKE ENGINEERING, 2013, 53 :240-253

← 1 2 3 →