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Contribution to the numeral simulation of propagation liquefied soil masses and their effects on structures

Sami Montassar
Abstract : Liquefaction of saturated granular soil embankments induced by seismic loading triggers flow failure and causes serious damage to civil engineering structures. In this work an approach is proposed in order to simulate the evolution of liquefied soil masses, modelled as a viscoplastic Bingham material, on the one hand, to calculate the drag force exerted by the liquefied soil flow on obstacles on the other hand. A numerical scheme based on the combination of a variational principle for the velocity field defined on the current configuration and a step-by-step time integration procedure is first presented in order to solve the evolution problem. A realistic boundary condition, which allows the slippage at the liquefied soil/substratum interface when a critical value of the shear stress is reached, is formulated and introduced in the numerical simulation. The efforts exerted by the liquefied soil flow on civil engineering structures are then evaluated by analysing the auxiliary problem of a Bingham fluid flow around an obstacle.
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https://pastel.archives-ouvertes.fr/pastel-00001148
Contributor : Ecole Des Ponts Paristech <>
Submitted on : Friday, March 18, 2005 - 8:00:00 AM
Last modification on : Friday, March 18, 2005 - 8:00:00 AM
Long-term archiving on: : Thursday, September 30, 2010 - 6:24:53 PM

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  • HAL Id : pastel-00001148, version 1

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Sami Montassar. Contribution to the numeral simulation of propagation liquefied soil masses and their effects on structures. Engineering Sciences [physics]. Ecole des Ponts ParisTech, 2005. English. ⟨pastel-00001148⟩

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