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Bertrand François

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Publications associées (35)

Numerical Simulation of an In-Situ underground Experiment for Nuclear Waste Storage

Lyesse Laloui, Bertrand François

2008

ACMEG-TS: A constitutive model for unsaturated soils under non-isothermal conditions

Lyesse Laloui, Bertrand François

This paper introduces an unconventional constitutive model for soils which deals with a unified thermo-mechanical modelling for unsaturated soils. The relevant temperature and suction effects are studied in light of elasto-plasticity. A generalized effecti ...

2008

Finite element modelling of thermo-elasto-plastic water saturated porous materials

Lyesse Laloui, Bertrand François

The purpose of this paper is to present a new finite element formulation for the hydro-thermo-mechanical analysis of elasto-plastic multiphase materials based on Porous Media Mechanics. To this end, the ACMEG-T thermo-plastic constitutive model for saturat ...

2008

Geomechanical Aspects of a Large Landslide by Means of a Finite-element Method : A Case Study

Lyesse Laloui, Bertrand François

2008

A thermo-hydro-mechanical stress-strain framework for modeling the performance of clay barriers in deep geological repositories for radioactive waste

Lyesse Laloui, Azad Koliji, Hervé Péron, Bertrand François, Mathieu Nuth

Assessing the performance of deep geological repositories for heat-generating radioactive waste requires reliable predictions of the thermo-hydro-mechanical (THM) behaviour of the clay barriers (the buffer material as well as the host rock/clay). This repr ...

CRC Press2008

Un modèle de comportement thermo-plastique pour les sols-non-saturés: Application aux stockages de déchets nucléaires

Bertrand François

Un modèle constitutif thermo-hydro-mécanique dédié aux sols fins a été développé afin de prédire le comportement des géomatériaux intervenant dans la problématique du confinement des déchets nucléaires en couche géologique profonde. Ce modèle considère l’a ...

2008

Experimental Investigations of Temperature and Suction Effects on Compressibility and Pre-Consolidation Pressure of a Sandy Silt

Lyesse Laloui, Bertrand François, Simon Salager

Research interest in the thermo-mechanical behaviour of unsaturated soils is growing as a result of an increasing number of geomechanical problems involving both thermal and unsaturated effects. In this framework, this paper addresses a unified thermo-mech ...

2008

Thermo-plasticity in unsaturated soils, a constitutive approach

Lyesse Laloui, Bertrand François

Research interest in the thermo-mechanical behaviour of unsaturated soils is growing as a result of an increasing number of geomechanical problems involving both thermal and unsaturated effects. A new constitutive model dealing with partially saturated soi ...

2008

Unsaturated soils under non-isothermal conditions: Framework of a new constitutive model

Lyesse Laloui, Bertrand François

This paper addresses a new, unified thermo-mechanical constitutive model for unsaturated soils through a coupled study. In the context of elasto-plasticity and the critical state theory, the model uses the concepts of multi-mechanism and bounding surface t ...

2008

Thermo-plasticity of fine-grained soils at various saturation states : application to nuclear waste disposal

Bertrand François

Soil is a particulate material that may undergo irreversible strain as the relative positions of the constituent particles change. That irreversible behaviour may be induced not only by an external stress variation but also by temperature or suction change ...

EPFL2008

Mechanical constitutive framework for thermal effects on unsaturated soils

Lyesse Laloui, Bertrand François, Mathieu Nuth

Taylor & Francis2007

Numerical modelling of the hydrogeological and geomechanical behaviour of a large slope movement: The Triesenberg landslide (Liechtenstein)

Lyesse Laloui, Laurent Tacher, Véronique Triguero, Bertrand François

Using advanced hydrogeological and geomechanical finite element modelling, it has been possible to model the mechanical behaviour of a large slope movement, the Triesenberg landslide. This slope is located along the Rhine valley in the Principality of Liec ...

2007

Compression Tests on a Sandy Silt at Different Suction and Temperature Levels

Lyesse Laloui, Bertrand François, David Ubals Picanyol, Simon Salager

This paper presents a unified thermo-mechanical experimental study on a remoulded unsaturated sandy silt and brings a contribution to the understanding of the fundamental mechanics of unsaturated soils in non- isothermal conditions. The experimental progra ...

2007

A stress-strain framework for modeling the behaviour of unsaturated soils under non-isothermal conditions

Lyesse Laloui, Bertrand François

This paper addresses a new, unified thermo-mechanical constitutive model for unsaturated soils through a coupled study. In the context of elastoplasticity and the critical state theory, the model uses the concepts of multimechanism and bounding surface the ...

2007

Constitutive modelling of the thermo-plastic behaviour of soils

Lyesse Laloui, Cane Cekerevac, Bertrand François

Research interest in the thermo-mechanical behaviour of soils is growing as a result of an increasing number of geomechanical problems involving thermal effects. This paper addresses various issues concerning the thermo-mechanical behaviour of soils. Start ...

2005

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