A fully coupled constitutive model for thermo-hydro-mechanical behaviour of unsaturated soils

This work presents a fully coupled constitutive model for thermo-hydro-mechanical behaviour of unsaturated soils. This model, with 18 parameters, can consider the primary features of unsaturated soils, such as mechanical responses at various temperatures and matric suctions, drying/wetting behaviour...

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Bibliographic Details
Published in:Computers and geotechnics 2021-05, Vol.133, p.104032, Article 104032
Main Authors: Liu, Yi, Cai, Guoqing, Zhou, Annan, Han, Bowen, Li, Jian, Zhao, Chengang
Format: Article
Language:English
Subjects:
Constitutive model
Constitutive models
Drying
Heating
Mathematical models
Mechanical properties
Non-isothermal
Soil
Soil mechanics
Soil suction
Soils
Temperature
Tests
Thermo-hydro-mechanical
Triaxial tests
Unsaturated soils
Volumetric strain
Wetting
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Summary:This work presents a fully coupled constitutive model for thermo-hydro-mechanical behaviour of unsaturated soils. This model, with 18 parameters, can consider the primary features of unsaturated soils, such as mechanical responses at various temperatures and matric suctions, drying/wetting behaviour (water retention curves and volumetric strain) at various temperatures and net stresses, and thermal volumetric behaviour at various matric suctions. A numerical example on a drained heating-drying-isotropic loading-wetting path is used to show the basic properties and performance of the proposed model. Finally, the proposed model is validated against experimental data for temperature/suction-controlled isotropic tests, temperature-controlled wetting-drying tests, suction-controlled heating-cooling tests and temperature/suction-controlled triaxial tests.
ISSN:0266-352X
1873-7633
DOI:10.1016/j.compgeo.2021.104032