Item: Avalanche Impact Pressure on a Plate-Like Obstacle
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Title: Avalanche Impact Pressure on a Plate-Like Obstacle
Proceedings: International Snow Science Workshop Grenoble – Chamonix Mont-Blanc - October 07-11, 2013
Authors:
- Emmanuel THIBERT [ IRSTEA, UR ETGR, 2 rue de la Papeterie, 38402 Saint Martin d'Hères Cedex, France. ]
- Thierry FAUG [ IRSTEA, UR ETGR, 2 rue de la Papeterie, 38402 Saint Martin d'Hères Cedex, France ] [ School of Civil Engineering, The University of Sydney, NSW 2006, Australia ]
- Hervé BELLOT [ IRSTEA, UR ETGR, 2 rue de la Papeterie, 38402 Saint Martin d'Hères Cedex, France ]
- Djebar BAROUDI [ School of Science and Technology, Aalto University, Department of Civil and Structural Engineering, FIN-00076 Aalto, Finland ]
Date: 2013-10-07
Abstract: Snow avalanche impact pressures on the flat surface of an instrumented structure have been quantified by experiments performed at full-scale. An inverse analysis method is used to reconstruct the pressure applied on this obstacle from the deformations recorded during the impact. The velocity of the avalanche is quantified by inner-flow optical sensors. Results are first analyzed on the basis of the drag coefficient to Froude number dependence via a power law. Then, a scaling law for a granular avalanche flowing around this plate-like obstacle is proposed to relate a generalized granular drag coefficient to the Froude number. Finally, the model’s applicability to describe impact pressures measured under real and full-scale conditions is discussed.
Object ID: ISSW13_paper_P2-35.pdf
Language of Article: English
Presenter(s): Unknown
Keywords: avalanche impact pressure, flow obstacle, snow deposition, granular flow, drag coefficient
Page Number(s): 663-670
Subjects: avalanche impact pressure snow avalanche hazard zoning
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