Documents disponibles écrits par cet auteur

About empirical models predicting the missile perforation of concrete barriers / J. Baroth in European journal of environmental and civil engineering, Vol. 16 N° 9 (special issue) (Octobre 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 N° 9 (special issue) (Octobre 2012) . - pp. 1074-1089 Titre : About empirical models predicting the missile perforation of concrete barriers Type de document : texte imprimé Auteurs : J. Baroth, Auteur ; L. Daudeville, Auteur ; Y. Malecot, Auteur Année de publication : 2012 Article en page(s) : pp. 1074-1089 Note générale : Génie Civil Langues : Français (fre) Mots-clés : Soft  and  hard  impacts  Reinforced  concrete  Perforation Résumé : This paper deals with empirical formulae predicting the perforation of reinforced concrete barriers. These formulae are usually validated for hard impacts only. Consequently, on the one hand, a simple method is proposed in case of soft impacts. For various tests, experimental and model predictions of perforation show a good agreement. On the other hand, recent tests at the material scale show that the behaviour of concrete under high confinement does not depend on the unconfined compressive strength of concrete after 28 days, fc 28. Therefore analytical models based on fc 28 need to be considered with caution. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.699746 [article] About empirical models predicting the missile perforation of concrete barriers [texte imprimé] / J. Baroth, Auteur ; L. Daudeville, Auteur ; Y. Malecot, Auteur . - 2012 . - pp. 1074-1089. Génie Civil Langues : Français (fre) in European journal of environmental and civil engineering > Vol. 16 N° 9 (special issue) (Octobre 2012) . - pp. 1074-1089 Mots-clés : Soft  and  hard  impacts  Reinforced  concrete  Perforation Résumé : This paper deals with empirical formulae predicting the perforation of reinforced concrete barriers. These formulae are usually validated for hard impacts only. Consequently, on the one hand, a simple method is proposed in case of soft impacts. For various tests, experimental and model predictions of perforation show a good agreement. On the other hand, recent tests at the material scale show that the behaviour of concrete under high confinement does not depend on the unconfined compressive strength of concrete after 28 days, fc 28. Therefore analytical models based on fc 28 need to be considered with caution. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.699746

Advanced simulation of damage of reinforced concrete structures under impact / S. Potapov in European journal of environmental and civil engineering, Vol. 16 N° 9 (special issue) (Octobre 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 N° 9 (special issue) (Octobre 2012) . - pp. 1090-1101 Titre : Advanced simulation of damage of reinforced concrete structures under impact Type de document : texte imprimé Auteurs : S. Potapov, Auteur ; V. Faucher, Auteur ; L. Daudeville, Auteur Année de publication : 2012 Article en page(s) : pp. 1090-1101 Note générale : Génie Civil Langues : Français (fre) Mots-clés : Discrete  elements  Finite  elements  Coupling  Fast  dynamics  Parallelism Résumé : The efficiency of the discrete element method for studying the fracture of heterogeneous media has been demonstrated, but it is limited by the size of the computational model. A coupling between the discrete element and the finite element methods is proposed to handle the simulation of impacts on large structures. The structure is split into sub-domains in each of which the method of analysis is adapted to optimise the modelling of the structure behaviour under impact. The DEM takes naturally into account the discontinuities and is used to model the media in the impact zone. The remaining structure is modelled by the FEM. Proposed combined DE/FE algorithm is implemented in the EUROPLEXUS fast dynamics software and parallelised with MPI formalism. The efficiency of the EUROPLEXUS multi-domain MPI parallel version is tested. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.699747 [article] Advanced simulation of damage of reinforced concrete structures under impact [texte imprimé] / S. Potapov, Auteur ; V. Faucher, Auteur ; L. Daudeville, Auteur . - 2012 . - pp. 1090-1101. Génie Civil Langues : Français (fre) in European journal of environmental and civil engineering > Vol. 16 N° 9 (special issue) (Octobre 2012) . - pp. 1090-1101 Mots-clés : Discrete  elements  Finite  elements  Coupling  Fast  dynamics  Parallelism Résumé : The efficiency of the discrete element method for studying the fracture of heterogeneous media has been demonstrated, but it is limited by the size of the computational model. A coupling between the discrete element and the finite element methods is proposed to handle the simulation of impacts on large structures. The structure is split into sub-domains in each of which the method of analysis is adapted to optimise the modelling of the structure behaviour under impact. The DEM takes naturally into account the discontinuities and is used to model the media in the impact zone. The remaining structure is modelled by the FEM. Proposed combined DE/FE algorithm is implemented in the EUROPLEXUS fast dynamics software and parallelised with MPI formalism. The efficiency of the EUROPLEXUS multi-domain MPI parallel version is tested. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.699747

Soft projectile impacts analysis on thin reinforced concrete slabs / C. Pontiroli in European journal of environmental and civil engineering, Vol. 16 N° 9 (special issue) (Octobre 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 N° 9 (special issue) (Octobre 2012) . - pp. 1058-1073 Titre : Soft projectile impacts analysis on thin reinforced concrete slabs : Tests, modelling and simulations Type de document : texte imprimé Auteurs : C. Pontiroli, Auteur ; A. Rouquand, Auteur ; L. Daudeville, Auteur Année de publication : 2012 Article en page(s) : pp. 1058-1073 Note générale : Génie Civil Langues : Français (fre) Mots-clés : Impact  Experiment  Concrete  model  Simulation Résumé : Numerical simulations of reinforced concrete structures subjected to high velocity impacts and explosions remain a difficult task today. For 10 years and more now, the CEA-Gramat has maintained a continuous research effort with the help of different French universities in order to overcome encountered difficulties in modelling the behaviour of concrete structures under severe loading. To get more data on aircraft impact problems and then validate numerical models, soft projectile impacts tests at small scale on thin reinforced concrete slabs has been carried out at CEA-Gramat. Numerical simulations of these tests have been carried out and compared with experimental results to validate our numerical approach. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.699745 [article] Soft projectile impacts analysis on thin reinforced concrete slabs : Tests, modelling and simulations [texte imprimé] / C. Pontiroli, Auteur ; A. Rouquand, Auteur ; L. Daudeville, Auteur . - 2012 . - pp. 1058-1073. Génie Civil Langues : Français (fre) in European journal of environmental and civil engineering > Vol. 16 N° 9 (special issue) (Octobre 2012) . - pp. 1058-1073 Mots-clés : Impact  Experiment  Concrete  model  Simulation Résumé : Numerical simulations of reinforced concrete structures subjected to high velocity impacts and explosions remain a difficult task today. For 10 years and more now, the CEA-Gramat has maintained a continuous research effort with the help of different French universities in order to overcome encountered difficulties in modelling the behaviour of concrete structures under severe loading. To get more data on aircraft impact problems and then validate numerical models, soft projectile impacts tests at small scale on thin reinforced concrete slabs has been carried out at CEA-Gramat. Numerical simulations of these tests have been carried out and compared with experimental results to validate our numerical approach. ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/full/10.1080/19648189.2012.699745