1. Modelling the effect of temperature on unsaturated soil behaviour
- Author
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Nabil Abou Bekr, Jean-Marie Fleureau, Said Taibi, Matthieu Dumont, Abdelghani Saouab, Laboratoire Ondes et Milieux Complexes (LOMC), Centre National de la Recherche Scientifique (CNRS)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Normandie Université (NU), Laboratoire de mécanique des sols, structures et matériaux (MSSMat), CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Laboratoire EOLE (EOLE), Faculté des Sciences de l'Ingénieur, Université Abou Bekr Belkaid, Département de Génie Civile, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon, Laboratoire Eau et Ouvrages dans Leur Environnement (EOLE), and Université de Tlemcen
- Subjects
Work (thermodynamics) ,Materials science ,Suction ,Unsaturated soils ,Capillary action ,Effective stress ,Constitutive equation ,0211 other engineering and technologies ,02 engineering and technology ,[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph] ,Stress (mechanics) ,[SPI]Engineering Sciences [physics] ,0203 mechanical engineering ,[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph] ,Geotechnical engineering ,ComputingMilieux_MISCELLANEOUS ,021101 geological & geomatics engineering ,Global and Planetary Change ,Simulation modeling ,Mechanics ,020303 mechanical engineering & transports ,Triaxial paths ,Soil water ,General Earth and Planetary Sciences ,Drying-wetting ,THM behaviour - Abstract
A simple thermohydromechanical (THM) constitutive model for unsaturated soils is described. The effective stress concept is extended to unsaturated soils with the introduction of a capillary stress. This capillary stress is based on a microstructural model and calculated from attraction forces due to water menisci. The effect of desaturation and the thermal softening phenomenon are modelled with a minimal number of material parameters and based on existing models. THM process is qualitatively and quantitatively modelled by using experimental data and previous work to show the application of the model, including a drying path under mechanical stress with transition between saturated and unsaturated states, a heating path under constant suction and a deviatoric path with imposed suction and temperature. The results show that the present model can simulate the THM behaviour in unsaturated soils in a satisfactory way. Comptes Rendus Geoscience, ISSN : 1631-0713, DOI: 10.1016/j.crte.2010.09.006, Issue : 12, Volume : 342, pp. 892-900, December 2010.
- Published
- 2010
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