International Snow Science Workshop Proceedings - Montana State University Library

Item: Actions of Snow Avalanches on a Snow Shed

• • Title: Actions of Snow Avalanches on a Snow Shed

    Proceedings: International Snow Science Workshop, Davos 2009, Proceedings

    Authors:

    • Y. Ma  [ Laboratoire Optimisation de la Conception et Ingénierie de l’Environnement (LOCIE), CNRS FRE3220, Université de Savoie, Campus Scientifique, Savoie Technolac, 73376, Le Bourget-Du-Lac cedex, France ]
    • E. Thibert  [ Cemagref UR ETGR, 2 rue de la Papeterie, 38402 Saint Martin d'Hères Cedex ]
    • P. Perrotin  [ Laboratoire Optimisation de la Conception et Ingénierie de l’Environnement (LOCIE), CNRS FRE3220, Université de Savoie, Campus Scientifique, Savoie Technolac, 73376, Le Bourget-Du-Lac cedex, France ]
    • M. Mommessin  [ Laboratoire Optimisation de la Conception et Ingénierie de l’Environnement (LOCIE), CNRS FRE3220, Université de Savoie, Campus Scientifique, Savoie Technolac, 73376, Le Bourget-Du-Lac cedex, France ]

    Date: 2009

    Abstract: The actions of snow avalanches on slightly inclined protection structures like snow sheds are a complex dynamic phenomenon. The impact stresses (normal and tangential) evolve not only in time but also in space. To better understand these actions so as to be able to design such structures, several studies have been conducted. Experimental measurements have been performed on a full-scale avalanche test site at Col du Lautaret (French Alps) where an instrumented plate with force sensors has been set up in an avalanche path. At each artificial release of an avalanche, the impact stresses and their temporal variations were measured. This real-scale approach is completed by a laboratory-scale experimental approach using granular flows in an inclined channel where normal and tangential forces on a basal plate are measured. The experimental results show that the impact effect is very important, particularly at the location of the rupture of slope formed by the shed. However, the stresses decrease rapidly when the distance to the rupture of slope increases. Finally, to assess the dynamic effect of the avalanche loading on the structure, dynamic simulations with a simplified multi-fiber model have been conducted. The results show that the dynamic effect is not negligible but is not critical for the structure. Additional Authors: Cemagref UR ETGR, 2 rue de la Papeterie, 38402 Saint Martin d'Hères Cedex

    Object ID: issw-2009-0543-0547.pdf

    Language of Article: English

    Presenter(s): Unknown

    Keywords: experiments, snow avalanche, granular flow, impact stresses

    Page Number(s): 243-547

    Subjects: snow avalanches snow shed impact stresses

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