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Numerical modeling for seismic site effects in sedimentary basins and influences of nonlinear soil behavior

Abstract : This work deals with the local response of sedimentary basins to weak and strong seismic waves, using numerical modeling. At low strain level, 2D/3D theoretical basins are used for linear site effects studies : in the case of 3D symetrical basin, existance conditions of «3D resonance» are given, function of geometrical and rheological parameters. ln 2D case, seismic response of two alpine valleys are modelised : the results are consistent with observed phenomena. At large strain level, the 3D formulation of a viscolelastic nonlinear model is suggested. Its implementation in a 1 D code using finite element method can be applied to a real case (Kushiro earthquake, 1993). Results obtained are compared to those of other models and to a real surface record.
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https://pastel.archives-ouvertes.fr/pastel-00003827
Contributor : Ecole Des Ponts Paristech <>
Submitted on : Tuesday, June 17, 2008 - 8:00:00 AM
Last modification on : Tuesday, June 17, 2008 - 8:00:00 AM
Long-term archiving on: : Friday, September 10, 2010 - 12:27:49 PM

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  • HAL Id : pastel-00003827, version 1

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Nicolas Delepine. Numerical modeling for seismic site effects in sedimentary basins and influences of nonlinear soil behavior. Sciences of the Universe [physics]. Ecole des Ponts ParisTech, 2007. English. ⟨pastel-00003827⟩

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