A thermal elastic visco-plastic model for soft clayey soils

Chen, Ze-Jian1; Feng, Wei-Qiang2,3; Chen, Wen-Bo1,4; Yin, Jian-Hua1,5

2023-11-01

10.1139/cgj-2022-0279

CANADIAN GEOTECHNICAL JOURNAL   影响因子和分区

0008-3674

1208-6010

It is frequently observed that the stress-strain behaviour of soft clayey soils is affected by temperature changes. Development and verification of a reliable constitutive model with consideration of variable temperature conditions are necessary. Due to the significant rheological and other nonlinear properties of clayey soils, the coupled effects of temperature, time dependency, structuration, nonlinear creep, and anisotropy should be considered in the constitutive model. In this study, a new threedimensional (3D) thermal elastic visco-plastic model is established and verified for the time-dependent stress-strain behaviour of clayey soils considering temperature changes. The model is developed based on the existing elastic visco-plastic models with the equivalent time concept, the overstress theory, and the critical state model. The thermal elastic line and virgin heating line are introduced and generalized to construct constitutive equations for both thermal elastic and thermal visco-plastic behaviour of clayey soils in general stress conditions. After establishing the 3D basic model, further refinement is introduced to consider the nonlinear creep behaviour and structuration for natural and reconstituted clayey soils. Finally, the model is successfully validated by a series of laboratory test data on different clayey soils under variable temperature paths with reasonably good accuracy.

temperature change clayey soils stress-strain behaviour thermal elastic visco-plastic (TEVP) model creep struc-turation

SCI ; EI

英语

通讯

Polytechnic University["ZDBS","CD82"] ; Key Special Project for Introduced Talents Team of Southern Marine Sci-ence and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0210] ; Southern Marine Science and Engineer-ing Guangdong Laboratory (Guangzhou)[K19313901]

Engineering ; Geology

Engineering, Geological ; Geosciences, Multidisciplinary

WOS:001109151200001

CANADIAN SCIENCE PUBLISHING

ENGINEERING

2-s2.0-85179889152

Web of Science

1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
2.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen, Peoples R China
3.Southern Marine Sci & Engn Guangdong Lab, Guangzhou, Peoples R China
4.Shenzhen Univ, Coll Civil & Transportat Engn, Shenzhen, Peoples R China
5.Hong Kong Polytech Univ, Res Inst Land & Space, Hong Kong, Peoples R China

Chen, Ze-Jian,Feng, Wei-Qiang,Chen, Wen-Bo,et al. A thermal elastic visco-plastic model for soft clayey soils[J]. CANADIAN GEOTECHNICAL JOURNAL,2023,61(2):208-227.

Chen, Ze-Jian,Feng, Wei-Qiang,Chen, Wen-Bo,&Yin, Jian-Hua.(2023).A thermal elastic visco-plastic model for soft clayey soils.CANADIAN GEOTECHNICAL JOURNAL,61(2),208-227.

Chen, Ze-Jian,et al."A thermal elastic visco-plastic model for soft clayey soils".CANADIAN GEOTECHNICAL JOURNAL 61.2(2023):208-227.