Documents disponibles écrits par cet auteur

Predicting concrete behaviour from quasi-static loading to hypervelocity impact / Christophe Pontiroli 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. 703-727 Titre : Predicting concrete behaviour from quasi-static loading to hypervelocity impact : An overview of the PRM model Type de document : texte imprimé Auteurs : Christophe Pontiroli, Auteur ; Alain Rouquand, Auteur ; Jacky Mazars, Auteur Année de publication : 2011 Article en page(s) : pp. 703-727 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Concrete  model  Damage  modelling  Plasticity  Structural  dynamics  Impact  loadings Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper presents the main results obtained during a long and intensive research period on the modelling of the main physical mechanisms related to damage and fracture of concrete. The starting point has been the Mazars one scalar damage model (Mazars, 1984, 1986). On this base Pontiroli & Rouquand have proposed in 1995 a two scalar damage model (PRM model) which takes into account the crack closure mechanism, irreversible strains, strain rate effects and internal friction stresses. This model has been recently completed in order to take into account pore collapse phenomena, plastic shear deformations and the water content effect on the behaviour of concrete for confined loading. All these mechanisms allow the simulation of a large range of loadings from static to high velocity impacts. After a presentation of the most important features of the "PRM coupled model" several applications are given related to quasi static loading, blast or impact effects on concrete structures. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/resnum.jsp [article] Predicting concrete behaviour from quasi-static loading to hypervelocity impact : An overview of the PRM model [texte imprimé] / Christophe Pontiroli, Auteur ; Alain Rouquand, Auteur ; Jacky Mazars, Auteur . - 2011 . - pp. 703-727. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 14 N° 6-7 (Juin 2010) . - pp. 703-727 Mots-clés : Concrete  model  Damage  modelling  Plasticity  Structural  dynamics  Impact  loadings Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper presents the main results obtained during a long and intensive research period on the modelling of the main physical mechanisms related to damage and fracture of concrete. The starting point has been the Mazars one scalar damage model (Mazars, 1984, 1986). On this base Pontiroli & Rouquand have proposed in 1995 a two scalar damage model (PRM model) which takes into account the crack closure mechanism, irreversible strains, strain rate effects and internal friction stresses. This model has been recently completed in order to take into account pore collapse phenomena, plastic shear deformations and the water content effect on the behaviour of concrete for confined loading. All these mechanisms allow the simulation of a large range of loadings from static to high velocity impacts. After a presentation of the most important features of the "PRM coupled model" several applications are given related to quasi static loading, blast or impact effects on concrete structures. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/resnum.jsp

Seismic risk / Jacky Mazars in European journal of environmental and civil engineering, Vol. 15 N° Spécial (Septembre 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° Spécial (Septembre 2011) . - pp. 223-246 Titre : Seismic risk : Structural response of constructions Titre original : Risques sismiques. Réponse des structures de génie civil Type de document : texte imprimé Auteurs : Jacky Mazars, Auteur ; Stéphane Grange, Auteur ; Cédric Desprez, Auteur Année de publication : 2012 Article en page(s) : pp. 223-246 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Earthquakes  Seismic  response  Modal  analysis  Reinforced  concrete  structures  Dynamic  nonlinear  behaviour  Seismic  vulnerability  Retrofit  of  existing  buildings Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper presents numerical techniques for computing the response of reinforced concretes structures. From the one degree of freedom case and after the formulation of the equations of dynamic equilibrium, the general case is considered. Two main aspects are treated, the one related to the modal analysis which, in the linear regime, leads to the mode shapes and the natural frequencies, and the one related to the seismic vulnerability analysis which, in the non linear regime, is able to describe the damage location and the critical zones of a given structure. Applications show that the strategy opens on tools useful to design the reinforcement of existing building. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16591 [article] Seismic risk = Risques sismiques. Réponse des structures de génie civil : Structural response of constructions [texte imprimé] / Jacky Mazars, Auteur ; Stéphane Grange, Auteur ; Cédric Desprez, Auteur . - 2012 . - pp. 223-246. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° Spécial (Septembre 2011) . - pp. 223-246 Mots-clés : Earthquakes  Seismic  response  Modal  analysis  Reinforced  concrete  structures  Dynamic  nonlinear  behaviour  Seismic  vulnerability  Retrofit  of  existing  buildings Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper presents numerical techniques for computing the response of reinforced concretes structures. From the one degree of freedom case and after the formulation of the equations of dynamic equilibrium, the general case is considered. Two main aspects are treated, the one related to the modal analysis which, in the linear regime, leads to the mode shapes and the natural frequencies, and the one related to the seismic vulnerability analysis which, in the non linear regime, is able to describe the damage location and the critical zones of a given structure. Applications show that the strategy opens on tools useful to design the reinforcement of existing building. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16591