Semiempirical model for the estimation of site amplification in Northern South America.

Autor: Mercado, Vicente, Pajaro, Cesar A, Arteta, Carlos A, Díaz, Fernando J, Montejo, Julián, Arcila, Mónica, Abrahamson, Norman A
Předmět:
Zdroj: Earthquake Spectra; May2023, Vol. 39 Issue 2, p1109-1139, 31p
Abstrakt: This article proposes a semiempirical model to estimate seismic site effects based on a predominant-period classification scheme for application in earthquake ground-motion models (GMMs). The proposed model introduces the use of the peak amplitude of the average horizontal-to-vertical ratio of the spectral response of the site obtained from earthquake records. The site effects model is implemented within a GMM estimated using ground-motion records from northern South America. The research compares the performance of the proposed site function with other formulations based on VS30 or site predominant period. This approach yields a smaller within-event variability than alternative methodologies, providing confidence for the reliability of the proposed site classification scheme as a viable alternative for the estimation of site effects, especially for sites for which VS30 measurements are not available. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index