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Original Articles

Analyse, dimensionnement et optimisation d'ouvrages de protection contre les chutes de blocs

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Pages 1041-1061 | Received 12 Feb 2007, Accepted 05 Feb 2008, Published online: 04 Oct 2011
 

ABSTRACT

The Structurally Dissipating Rock-shed (SDR) is a new kind of protective structures. It uses directly the slab motion and the deformation of slab and fuse supports to dissipate impact energy of rock blocks. In this article, a simple and efficient numerical tool for SDR analyses is firstly presented. It has then been verified by the results of experimental tests. This tool has been applied to parametric design studies of SDR structures. Finally, different kinds of rock impact conditions have been studied with the help of this tool in order to optimize the SDR concept, particularly with respect to the punching shear. All theses studies show the robustness of the SDR concept, and permit to improve its design method.

RÉSUMÉ

Le Pare-blocs Structurellement Dissipant (PSD) est un type d'ouvrages de protection innovant. Il utilise directement le mouvement de la dalle, et la déformation de la dalle et des appuis fusibles, pour dissiper l'énergie d'impact de blocs rocheux. Dans cet article, un outil simple et efficace pour analyser le PSD est d'abord présenté, il est ensuite vérifié grâce aux résultats d'essais expérimentaux. Cet outil est utilisé pour réaliser des études paramétriques de dimensionnement de PSD. Enfin, différentes conditions d'impacts rocheux sont analysées à l'aide de cet outil pour optimiser le concept de PSD, particulièrement sa résistance vis-à-vis du poinçonnement. Toutes ces études montrent la robustesse du concept PSD, et permettent d'améliorer sa méthode de dimensionnement.

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