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Lyesse Laloui

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Publications associées (386)

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

Lyesse Laloui, Bertrand François

2008

Numerical simulation of the non-isothermal mechanical behaviour of soils

Lyesse Laloui, Cane Cekerevac

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 concerns the constitutive modelling of non- isothermal mechanical behaviour of clay ...

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

Advances in modelling hysteretic water retention curve in deformable soils

Lyesse Laloui, Mathieu Nuth

Experimental findings on the hysteretic nature of the soil water retention curve, relating the degree of saturation to the matric suction, have generally to be superimposed with the aspects due to the deformability of the soil matrix. Indeed, most state-of ...

2008

Advanced hydro-mechanical coupling for unified constitutive modelling of unsaturated soils

Lyesse Laloui, Mathieu Nuth

A new unified constitutive hydro-mechanical model named ACMEG-s is formulated to improve modelling of unsaturated soils in free or constrained conditions. Indeed, due to particular mechanical and hydraulic boundary conditions, some natural and engineered f ...

Taylor & Francis2008

Desiccation cracking of soils: modeling of stress generation and crack propagation

Lyesse Laloui, Hervé Péron

This paper is an experimental and numerical investigation of desiccation and the associated cracking. First an elastic formulation of the hydro-mechanical problem is presented, based on an analogy that can be drawn with thermo-elasticity. Then, the results ...

2008

Desiccation shrinkage of unconstrained soil in the saturated phase

Lyesse Laloui, Hervé Péron

CRC Press2008

Mechanical testing in unsaturated soils

Lyesse Laloui

The state-of-the-art report presented herein is aimed at documenting, to the largest extent possible, some of the recent advances in laboratory testing of unsaturated soils for stress-strain-strength-stiffness characterization under suction-controlled isot ...

2008

Temperature Effects on Volume Change and Hydraulic Properties of Geosynthetic Clay Liners

Lyesse Laloui

As geosynthetic clay liners (GCLs) are becoming integral components of modern municipal solid waste landfill lining systems, increased interest is directed at investigating their behaviour under different environmental stresses such temperature, chemical c ...

Industrial Fabrics Association International (IFAI)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

Effective Stress Concept in Unsaturated Soils: Clarification and Validation of an Unified Framework

Lyesse Laloui, Mathieu Nuth

The effective stress principle, conventionally applied in saturated soils, is reviewed for constitutive modelling purposes. The assumptions for the applicability of Terzaghi’s single effective stress are recalled and its advantages are inventoried. The pos ...

2008

Advanced Compact Device for the In-situ Determination of Geothermal Characteristics of Soils

Lyesse Laloui, Gilbert Steinmann

The in-situ thermal response test provides an effective method to determine the ground thermal properties required for the design of a geothermal energy installation. This paper presents a unique compact testing device for in-situ thermal response testing ...

2008

New basis for the constitutive modelling of aggregated soils

Lyesse Laloui, Laurent Vulliet, Azad Koliji

Natural and compacted soils are usually characterized by aggregation of particles. The mechanical behaviour of these materials depends on soil structure. The oedometric compression tests performed on aggregated samples presented here showed that these mate ...

Springer-Verlag2008

Modelling of the combined effect of strain rate and temperature on one-dimensional compression of soils

Lyesse Laloui

Strain rate and temperature have important effects on the behaviour of soils. The present paper enhances the thermo-viscoplastic modelling of soils by taking advantage of the most recent understanding of the effects of temperature and strain rate on soils. ...

2008

Investigations on the mechanical behavior of a heat exchanger pile

Lyesse Laloui, Mathieu Nuth

The geothermal use of concrete geostructures (piles, walls and slabs) is an environmentally friendly way of cooling and heating buildings. With such geothermal structures, it is possible to transfer energy from the ground to fluid-filled pipes cast in conc ...

Crc Press-Taylor & Francis Group, 6000 Broken Sound Parkway Nw, Ste 300, Boca Raton, Fl 33487-2742 Usa2008

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

Actual problems in the study of soil dynamics of the upper Adriatic sea

Lyesse Laloui

2008

Non-isothermal plasticity model for cyclic behaviour of soils

Lyesse Laloui, Cane Cekerevac

On the one hand, it has been observed that liquefaction- induced shear deformation of soils accumulates in a cycle- by-cycle pattern. On the other hand, it is known that heating could induce plastic hardening. This study deals with the constitutive modelli ...

2008

Drying Shrinkage of Deformable Porous Media: Mechanisms Induced by the Fluid Removal

Lyesse Laloui, Hervé Péron

2007

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