Génération daccélérogrammes synthétiques large bande par méthode hybride : application au seisme de NiigataReport as inadecuate




Génération daccélérogrammes synthétiques large bande par méthode hybride : application au seisme de Niigata - Download this document for free, or read online. Document in PDF available to download.

* Corresponding author 1 BRGM - Bureau de Recherches Géologiques et Minières

Abstract : Hisada proposes as an hybrid method to add low-frequency deterministic results with high-frequency stochastic results produced by the sum of virtual sources with random phase pondered by radiation coefficients Onishi and al, 2004. We show that the random phase hypothesis leads to unrealistic accelerograms : high-frequency accelerations are not localised in time. We propose therefore to relocate in time high frequency accelerations by using an exponential weighting function over the high-frequency source function. This method is applied to the 2007 Niigata Chuetsu Oki earthquake : high-frequency parts of the spectra reproduce the observations,

Mots-clés : stochastique hybride relocalisation haute fréquence Niigata





Author: Mickael Delatre - Hideo Aochi -

Source: https://hal.archives-ouvertes.fr/



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