Site Classification Using Horizontal-to-vertical Response Spectral Ratios and its Impact when Deriving Empirical Ground-motion Prediction Equations - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Earthquake Engineering Année : 2007

Site Classification Using Horizontal-to-vertical Response Spectral Ratios and its Impact when Deriving Empirical Ground-motion Prediction Equations

(1) , (2) , (2) , (3)
1
2
3

Résumé

We classify sites based on their predominant period computed using average horizontal-to-vertical (H/V) response spectral ratios and examine the impact of this classification scheme on empirical ground-motion models. One advantage of this classification is that deep geological profiles and high shear-wave velocities are mapped to the resonance frequency of the site. We apply this classification scheme to the database of Fukushima et al. [2003], for which stations were originally classified as simply rock or soil. The calculation of average H/V response spectral ratios permits the majority of sites in the database to be unambiguously classified. Soft soil conditions are clearly apparent using this technique. Ground-motion prediction equations are then computed using this alternative classification scheme. The aleatoric variability of these equations (measured by their standard deviations) is slightly lower than those derived using only soil and rock classes. However, perhaps more importantly, predicted response spectra are radically different to those predicted using the soil/rock classification. In addition, since the H/V response spectral ratios were used to classify stations the predicted spectra for different sites show clear separation. Thus, site classification using the predominant period appears to be partially mapped into the site coefficients of the ground-motion model.
Fichier principal
Vignette du fichier
fukushimaetal2007a.pdf (1.18 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00702823 , version 1 (31-05-2012)

Identifiants

Citer

Yoshimitsu Fukushima, L.F. Bonilla, Oona Scotti, John Douglas. Site Classification Using Horizontal-to-vertical Response Spectral Ratios and its Impact when Deriving Empirical Ground-motion Prediction Equations. Journal of Earthquake Engineering, 2007, 11 (5), pp.712-724. ⟨10.1080/13632460701457116⟩. ⟨hal-00702823⟩

Collections

IRSN BRGM
217 Consultations
1123 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More