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Strength and damage of concrete under high triaxial loading / Yann Malécot in European journal of environmental and civil engineering, Vol. 14 N° 6-7 (Juin 2010) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 14 N° 6-7 (Juin 2010) . - pp. 777-803 Titre : Strength and damage of concrete under high triaxial loading Type de document : texte imprimé Auteurs : Yann Malécot, Auteur ; Daudeville, Laurent, Auteur ; Fabrice Dupray, Auteur Année de publication : 2011 Article en page(s) : pp. 777-803 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Concrete  Triaxial  test  High  confinement  Mesoscale  modeling  Young's  modulus Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This study focuses on identifying concrete behavior under severe loading (near field detonation or ballistic impacts). In order to reproduce high stress levels with wellcontrolled loading paths, static tests are carried out on concrete samples by mean of a very high-capacity triaxial press. Experimental results indicate a sizeable change in concrete behavior with confining pressure. At low pressure values, the concrete exhibits brittle behavior with failure caused by a localized damage mechanism. In contrast, at high confining pressures, the concrete becomes a ductile material, and failure is associated with diffuse material damage. These tests also show an evolution of the elastic characteristics of concrete. A numerical modeling of these previous experiments is performed at a mesoscopic scale. It provides a reproduction of the main characteristics of concrete behavior under high confinement, both qualitatively and quantitatively. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/resnum.jsp [article] Strength and damage of concrete under high triaxial loading [texte imprimé] / Yann Malécot, Auteur ; Daudeville, Laurent, Auteur ; Fabrice Dupray, Auteur . - 2011 . - pp. 777-803. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 14 N° 6-7 (Juin 2010) . - pp. 777-803 Mots-clés : Concrete  Triaxial  test  High  confinement  Mesoscale  modeling  Young's  modulus Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This study focuses on identifying concrete behavior under severe loading (near field detonation or ballistic impacts). In order to reproduce high stress levels with wellcontrolled loading paths, static tests are carried out on concrete samples by mean of a very high-capacity triaxial press. Experimental results indicate a sizeable change in concrete behavior with confining pressure. At low pressure values, the concrete exhibits brittle behavior with failure caused by a localized damage mechanism. In contrast, at high confining pressures, the concrete becomes a ductile material, and failure is associated with diffuse material damage. These tests also show an evolution of the elastic characteristics of concrete. A numerical modeling of these previous experiments is performed at a mesoscopic scale. It provides a reproduction of the main characteristics of concrete behavior under high confinement, both qualitatively and quantitatively. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/resnum.jsp