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Etude du comportement sous impact d'une strcuture pare-blocs en béton armé

Abstract : This thesis studies the behaviour of a new concept for a protection gallery under rock fall, called Structurally Dissipating Rock-shed (SDR). The main innovation, compared to conventional solutions, is to dissipate the impact energy directly into the reinforced concrete slab or into fuse supports, and no longer in a cushion layer. The dynamic phenomena, taking place during the impact of a block onto the slab, are analyzed by means of experiments on a 1/3 scale SDR structure. The percussion loads applied to the slab, during the contact phase with the block, are assessed as well as the various energy transfers and dissipations. The results allowed to validate the operating and repair principles of the SDR and revealed that the slab is damaged by three main mechanisms: the punching, the bending and the breaking down at surface level of the impacted zone. The principal experimental values are found by numerical simulations of the tests with a finite elements tool. A simplified mechanical model "masses-springs-damping" is also developed with the aim of implementing design methods for engineering offices. The prospects for this work are to succeed in establishing design and construction recommendations for structurally dissipating rock-sheds.
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Contributor : Fabien Delhomme <>
Submitted on : Monday, May 2, 2005 - 2:41:35 PM
Last modification on : Friday, November 6, 2020 - 3:25:18 AM
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  • HAL Id : tel-00009161, version 1



Fabien Delhomme. Etude du comportement sous impact d'une strcuture pare-blocs en béton armé. Matériaux. Université de Savoie, 2005. Français. ⟨tel-00009161⟩



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