ALERT Workshop 2001
8^th-10^th October 2001, Aussois, France

DAY 1, MONDAY, OCTOBER 8
Quasi-Brittle Geomaterials (concretes and rocks)
Coordinators: G. Pijaudier-Cabot and A. Huerta

• Macroscopic damage modelling based on micromechanical considerations (J.F. Shao, D. Kondo, and V. Pensee)
• In situ snow fracture toughness measurement and discrete modelling (F. Ailletaz, D. Daudon, J. Lanier, Bonjean)
• Meso-analysis of quasibrittle materials using interface elements : recent developments (I. Carol).
• Nonlocal plasticity model for strain softening materials (S. Rolshoven and M. Jirasek)
• Uniqueness numerical analysis for boundary value problems involving classical and second gradient models for cohesive materials (J.C. Moulet and R. Chambon)
• Stability in geomechanics : contribution of a hyperelastic model in plane deformation (N. Challamel)
• Computational resolution of localised strain (B. Patzak, M. Jirasek)
• Some computational issues for complex geomaterials: quadratic convergence and accurate adaptive computations (A. Huerta, A. Perez-Foquet, A. Rodriguez-Ferran)
• Computational aspects in the modelling of quasi-brittle material (Z. Bittnar, B. Patzak and J. Nemecek)
• Modeling of elastoplastic damage in unsaturated hard rocks and concrete (J. F. Shao, F. Bourgeois , N. Burlion)
• Numerical modelling of hydro-mechanical fracture behaviour (C. Guiducci, A. Pellegrino, J.P. Radu, F. Collin and R. Charlier)
• Spalling behaviour of high performance and ultra-high performance concrete structures under fire (C. Majorana)
• Porosity, chemical degradation and scaling of fracture in mortar structures (K. Haidar, G. Pijaudier-Cabot, J.Y. Le Touzo)

DAY 2, TUESDAY, OCTOBER 9
Mechanics and physics of granular materials
Coordinators: I. Vardoulakis and F. Calvetti

• A Numerical model of granular materials and its application to the study on exact relationship between stress and strain increments (Y. Kishino)
• Redundant granular space lattice structures: soil mechanics revisited (C. Thornton)
• Change of scale for strain in granular materials: the usual mistake (B. Cambou and Ph. Dubujet)
• Microscopic features of quasi-static rheology of granular materials (F. Radjai)
• A Continuum theory of erosion and filtration phenomena (I. Vardoulakis)
• Kinetic energy and second order work in discrete materials (F. Laouafa, F. Darve and J. Lanier)
• Interface behaviour of granular materials: discrete element modelling of ring simple shear tests and link with statistical homogenization analysis (C. Claquin and F. Emeriault)
• On the incremental non-linearity of soils: constitutive considerations (G. Viggiani and C. Tamagnini)
• On the incremental non-linearity of soils: micromechanical interpretation (F. Calvetti)
• Modelling of liquefaction failures in slopes: initiation and propagation (M.Pastor, J.A.Fernández-Merodo, P.Mira, M.Quecedo, M.I.Herreros and E.González)
• Influence of initial structure on liquefaction properties of a loose sand (N. Benahmed, J. Canou and J.-C. Dupla)
• Statistical evaluation of the mechanical properties of granularmedia (M. A. Hicks and S. Y. Wong)
• Micro-mechanics of granular flow (M. Kern and L. Vulliet)
• Cyclic mechanical behaviour of granular media; application to road pavement (L. Vulliet, F. Mayoraz)

DAY 3, WEDNESDAY, OCTOBER 10
Rate-dependency and thermo-chemo mechanics of geomaterials
Coordinators: P. Delage and C. Di Prisco

• A formulation for hydro-mechanical and chemical behaviour of clays (A. Gens)
• Viscous behaviour of geomaterials : application to sands and bituminous mixes (H. di Benedetto)
• Time dependent behaviour of sands (E. Ibraim and H. Di Benedetto)
• Elasto-visco plasticity and time dependenca of mechanical behaviour of sands (C. Di Prisco)
• Time dependent behaviour of oil reservoir chalks,
  First experimental results (Ch. Schroeder, V. De Gennaro and Y.J. Cui)
• Elaboration of an elasto-visco-plasticity constitutive model for chalk mechanical behaviour (M. Datcheva, F. Collin and R. Charlier)
• Modeling of miscible grout propagation in a saturated deformable porous medium: an overview of mathematical, numerical and experimental aspects (F. Bouchelaghem, L. Vulliet and L. Laloui)
• Thermo-mechanical yielding of kaolin (C. Cekerevac, L. Laloui and L.Vulliet)
• Effects of a thermal cycle and induced dehydration on the porosity of a cement (L. Alarcon-Ruiz, P. Tamagny, D. Pasquero, A. Feraille and E.Massieu)
• New approach to the dispersion and the adsorption of pollutant in heterogeneous porous media (J. Sicard, Ph. Saint and V. Chaplain)
• Clay-leachate interaction: a first insight (R. Schmitz, D. Dosquet, P. Illing, C. Rodriguez, AS Ourth, JC Verbrugge, S. Hilligsman, C. Schroeder, A. Bolle, J. Thorez, R. Charlier)
• The effect of pollutant on the confining properties of a swelling clay (Ch. Proust and A. Jullien)
• Effect of exchangeable cations on the compressibility of bentonite clays (D. Marcial, P. Delage and Y. J. Cui)

Pierre Delage (ENPC Paris) and Claudio Di Prisco (Politecnico di Milano)