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A dynamic solution of the shear band propagation in submerged landslides

Puzrin, Alexander ; Saurer, Erich ; Germanovich, Leonid

In: Granular Matter, 2010, vol. 12, no. 3, p. 253-265

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    Titre
    • A dynamic solution of the shear band propagation in submerged landslides
    Auteur
    • Puzrin, Alexander. Institute for Geotechnical Engineering, ETH Zurich, Wolfgang-Pauli-Strasse 49, 8093, Zurich, Switzerland
    • Saurer, Erich. Institute for Geotechnical Engineering, ETH Zurich, Wolfgang-Pauli-Strasse 49, 8093, Zurich, Switzerland
    • Germanovich, Leonid. Center for Applied Geomaterials Research, Georgia Institute of Technology, Atlanta, USA
    Type de document
    • Postprint
    Identifiant OAI-PMH
    • oai:doc.rero.ch:321223
    Summary
    A failure mechanism of submarine landslides based on the phenomenon of shear band propagation has been investigated using the energy balance approach. Dynamic analysis includes inertia effects in the sliding layer and viscous resistance of the water, but ignores elastic and plastic wave propagation in the sliding layer. The resulting differential equation has been solved numerically. Analytical approximation of this numerical solution provides a convenient basis for the parametric and sensitivity studies. The solution allows assessing the velocity and acceleration of both the landslide and the shear band at the moment when the slide fails due to the limiting equilibrium (i.e., the initial post-failure velocity). The effects of the initial landslide velocity on the tsunami wave height are discussed and validated for a number of landslide examples