Exploració per autor "Vaunat, Jean"
Ara es mostren els items 2-21 de 88
-
A constitutive model for soft clayey rocks that includes weathering effects
Pinyol Puigmartí, Núria Mercè; Vaunat, Jean; Alonso Pérez de Agreda, Eduardo (Institution of Civil Engineers (http://www.ice.org.uk/), 2007)
Article
Accés obertMicrostructural and mineralogical observations of claystones reveal the presence of clay aggregates bonded by a skeleton of inert minerals such as calcium carbonate. The behaviour of these natural materials evolves from ... -
A cross-anisotropic formulation for elasto-plastic models
Mánica Malcom, Miguel Ángel; Gens Solé, Antonio; Vaunat, Jean; Ruiz Restrepo, Daniel Felipe (2016-06)
Article
Accés restringit per política de l'editorialA cross-anisotropic formulation for elasto-plastic constitutive models based on a non-uniform scaling of the stress tensor is described. Taking advantage of the material symmetries characterising cross-anisotropy, only two ... -
A densification mechanism to model the mechanical effect of methane hydrates in sandy sediments
de la Fuente Ruiz, María; Vaunat, Jean; Marín Moreno, Héctor (2020-04)
Article
Accés obertRecent pore-scale observations and geomechanical investigations suggest the lack of true cohesion in methane hydrate-bearing sediments (MHBSs) and propose that their mechanical behavior is governed by kinematic constrictions ... -
A framework for the time-dependent behaviour of soft structured clays
Mánica Malcom, Miguel Ángel; Ovando-Shelley, Efrain; Jaramillo, Eduardo Botero; Gens Solé, Antonio; Vaunat, Jean (2022)
Text en actes de congrés
Accés restringit per política de l'editorialFrom the combination of existing modelling approaches, a constitutive framework is presented for the numerical modelling of soft structured clays. The formulation accounts, in a natural way, for time-dependent phenomena ... -
A full-scale in situ heating test in Callovo-Oxfordian claystone: observations, analysis and interpretation
Tourchi, Saeed; Vaunat, Jean; Gens Solé, Antonio; Bumbieler, F.; Vu, Minh-Ngoc; Armand, G. (Elsevier, 2021-05)
Article
Accés obertThe paper describes the performance, observations and numerical interpretation of a full-scale in situ heating test conducted on Callovo-Oxfordian (COx) claystone in the Meuse / Haute-Marne (MHM) Underground Research ... -
A microstructural model on the link between change in pore size distribution and wetting induced deformation in a compacted silt
Casini, Francesca; Vaunat, Jean; Romero Morales, Enrique Edgar (American Society of Civil Engineers (ASCE), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialThe water retention curve expressed in terms of water content or degree of saturation and suction is hysteretic, stress path dependent (on void ratio), and depends on pore network. To properly describe its evolving nature, ... -
A procedure for the direct determination of Bishop's chi parameter from changes in pore size distribution
Vaunat, Jean; Casini, F. (Thomas Telford, 2017-07)
Article
Accés obertMost of the recent works relating to the concept of effective stress in unsaturated soils focus on the proposal by Bishop, and, more particularly, on the search for suitable relationships between Bishop's ¿ parameter and ... -
A thermomechanical model for argillaceous hard soils–weak rocks: application to THM simulation of deep excavations in claystone
Tourchi, Saeed; Mánica Malcom, Miguel Ángel; Gens Solé, Antonio; Vaunat, Jean; Vu, Minh-Ngoc; Armand, Gilles (2023-11-15)
Article
Accés restringit per política de l'editorialThe paper presents the enhancement of an existing constitutive model for argillaceous hard soils-weak rocks to incorporate non-isothermal conditions to be used in coupled thermo-hydro-mechanical (THM) simulations of ... -
A time-dependent anisotropic model for argillaceous rocks: application to an underground excavation in Callovo-Oxfordian claystone
Mánica Malcom, Miguel Ángel; Gens Solé, Antonio; Vaunat, Jean; Ruiz Restrepo, Daniel Felipe (2017-05)
Article
Accés obertThe paper presents a constitutive model for argillaceous rocks, developed within the framework of elastoplasticity, that includes a number of features that are relevant for a satisfactory description of their hydromechanical ... -
An effective combined framework for modelling the time-dependent behaviour of soft structured clays
Mánica Malcom, Miguel Ánge; Gens Solé, Antonio; Ovando-Shelley, Efrain; Jaramillo, Eduardo Botero; Vaunat, Jean (Springer, 2021-02)
Article
Accés obertA constitutive framework for the simulation of the time-dependent behaviour of soft structured clays has been developed from the combination of a number of existing modelling approaches. The formulation accounts, in a ... -
An interior - point algorithm for hyper-plastic models for soils
Samat, Sergio; Vaunat, Jean; Gens Solé, Antonio (2009)
Text en actes de congrés
Accés obertIn numerical analysis of geotechnical problems it is often necessary to use sophisticated elastoplastic constitutive models. Particularly, the presence of friction as the fundamental mechanism to dissipate energy provides ... -
Analysis of strain localization with a non-local plasticity model
Mánica Malcom, Miguel Ángel; Gens Solé, Antonio; Vaunat, Jean; Ruiz Restrepo, Daniel Felipe (2017)
Text en actes de congrés
Accés obertStrain localization can be defined as the accumulation of deformations in narrow zones, in the form of shear bands or cracks, commonly observed in several geomaterials like concrete, rocks, dense sands, or stiff fine-grained ... -
Analysis of strain localization with a nonlocal plasticity model
Mánica, Miguel A.; Gens Solé, Antonio; Vaunat, Jean; Ruiz, Daniel F. (CIMNE, 2017)
Text en actes de congrés
Accés obertIn the present paper a nonlocal plasticity model is described, intended to reproduce the mechanical behaviour of stiff fine-grained soils, including the objective simulation of strain localization; the phenomenon of accumulation ... -
Analysis of the excavation of a deep drift in a tertiary clay
Vaunat, Jean; Gens Solé, Antonio; de Vasconcelos, R.; Li, X.-L. (International Centre for Computational Engineering, 2011)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper tackles the issues related to the excavation of a horizontal gallery carried out in Boom clay, a tertiary clay that hosts the Underground Laboratory of the Belgium Nuclear Agency (SCK-CEN). The gallery is 85 m ... -
Analysis of the hydration of an unsaturated seal
Ruiz Restrepo, Daniel Felipe; Vaunat, Jean; Gens Solé, Antonio; Mánica Malcom, Miguel Ángel (American Society of Civil Engineers (ASCE), 2018)
Text en actes de congrés
Accés restringit per política de l'editorialThe paper contains a coupled numerical analysis of the hydration of a potential sealing system for isolating shafts, ramps, and connecting galleries in a deep geological repository for high level nuclear waste. The modeling ... -
Análisis de la estabilidad de laderas mediante Macro-Elementos
Sánchez Fornia, Jatnna Alexandra; Vaunat, Jean (International Centre for Numerical Methods in Engineering (CIMNE), 2022)
Text en actes de congrés
Accés obertLa modelación numérica de la respuesta de laderas naturales bajo acciones climáticas a escala regional requiere una capacidad de cálculo actualmente fuera de alcance. Una alternativa consiste en usar modelos reducidos, ... -
Anisotropic failure criterion for an argillaceous rock: formulation and application to an underground excavation case
Mánica, Miguel A.; Gens Solé, Antonio; Vaunat, Jean; Ruiz, Daniel F. (CIMNE, 2015)
Comunicació de congrés
Accés obert -
Anisotropy effects in a deep excavation in stiff clay
Vaunat, Jean; Gens Solé, Antonio; De Vasconcelos, Ramón (CIMNE, 2013)
Text en actes de congrés
Accés obertThis paper tackles the issues related to the excavation of a horizontal gallery carried out in Boom clay, a tertiary clay that hosts the Underground Laboratory of the Belgium Nuclear Agency (SCK-CEN). The gallery is 85 m ... -
Anisotropy effects in a deep excavation in stiff clay
Vaunat, Jean; Gens Solé, Antonio; Barboza de Vasconcelos, Ramón (2013)
Text en actes de congrés
Accés obertThis paper tackles the issues related to the excavation of a horizontal gallery carried out in Boom clay, a tertiary clay that hosts the Underground Laboratory of the Belgium Nuclear Agency (SCK-CEN). The gallery is 85 m ... -
Applications of multiphysical geomechanics in underground nuclear waste storage
Gens Solé, Antonio; Garitte, Benoit; Olivella Pastallé, Sebastià; Vaunat, Jean (Lavoisier Éditions, 2009)
Article
Accés obertDeep geological disposal in suitable host rocks is the favoured strategy for the storage and disposal of heat-emitting high level nuclear waste. A rational design of repositories requires a good understanding of the ...