Simplified vibratory characterization of alluvial basins

Details Simplified vibratory characterization of alluvial basins Simplified vibratory characterization of alluvial basins

2011-08-17

arxiv.org/abs/1108.3403v1

Comptes Rendus de l Acad\'emie des Sciences - Series IIA - Earth and Planetary Science 335, 4 (2003) 365-370

Physics

Geophysics

Scientific paper

For the analysis of seismic wave amplification, modal methods are interesting tools to study the modal properties of geological structures. Modal approaches mainly lead to information on such parameters as fundamental frequencies and eigenmodes of alluvial basins. For a specific alluvial deposit in Nice (France), a simplified modal approach involving the Rayleigh method is considered. This approach assumes a set of admissible shape functions for the eigenmodes and allows a fast estimation of the fundamental frequency of the basin. The agreement between modal numerical results and experimental ones is satisfactory. The simplified modal method then appears as an efficient mean for the global vibratory characterization of geological structures towards resonance.

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