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Modélisation par la méthode des éléments discrets d'impacts de blocs rocheux sur structures de protection type merlons

Abstract : Reinforced embankments against rock fall impacts are empirically designed. The discrete element method is used to improve this type of constructions that suffers from failure and large deformation during an impact. Principal mechanical characteristics from the literature are used for a calibration phase with simulation of triaxial tests. After this, dynamic behaviour is calibrated by simulating boulder impacts on a layer of soil as fill. This model of soil is used to simulate impacts on an embankment. Several sizes of structures are simulated, in accordance with the variation of the kinetic energy of the rock mass impacting. A parametrical study is realized concerning the aspects of the block and the embankment. Thus the main aspects ruling the impact phase are identified. Finally, the combined variation of these parameters evaluates the capacity of the embankment to retain the block.
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https://tel.archives-ouvertes.fr/tel-00290402
Contributor : Jean-Patrick Plassiard <>
Submitted on : Wednesday, June 25, 2008 - 11:01:25 AM
Last modification on : Friday, November 6, 2020 - 4:02:22 AM
Long-term archiving on: : Friday, November 25, 2016 - 9:07:47 PM

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  • HAL Id : tel-00290402, version 1

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Jean-Patrick Plassiard. Modélisation par la méthode des éléments discrets d'impacts de blocs rocheux sur structures de protection type merlons. Sciences de l'ingénieur [physics]. Université Joseph-Fourier - Grenoble I, 2007. Français. ⟨tel-00290402⟩

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