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Authors: | Theodulidis, Nikos* Cultrera, Giovanna* Tento, Alberto* Faeh, Donat* Atakan, Kuvvet* Bard, Pierre-Yves* Panou, Areti* Haghshenas, Ebrahim* SESAME Team* |
Title: | EMPIRICAL EVALUATION OF THE HORIZONTAL-TO-VERTICAL SPECTRAL RATIO TECHNIQUE: RESULTS FROM THE “SESAME” PROJECT | Issue Date: | 1-Aug-2004 | URL: | http://www.iitk.ac.in/nicee/wcee/article/13_2323.pdf | Keywords: | Sesame project, H/V spectral ratio, empirical evaluation | Subject Classification: | 04. Solid Earth::04.06. Seismology::04.06.04. Ground motion 04. Solid Earth::04.06. Seismology::04.06.06. Surveys, measurements, and monitoring 04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk |
Abstract: | In order to empirically evaluate the horizontal-to-vertical (H/V) spectral ratio technique, ambient noise measurements performed in about two hundred sites mainly in Europe where weak or/and strong motion data was recorded. Standard Information Sheets (SIS) and earthquake information data were included in the SESAME [Site EffectS assessment using AMbient Excitations] project database, specially designed to facilitate data selection. All noise recordings were processed with JSESAME software to calculate (H/V) spectral ratio, whereas weak and strong motion earthquake recordings were processed with a similarly standardized procedure. For the latter, (H/V) receiver function for all sites were calculated. Experimental site transfer functions obtained from earthquake recordings were compared with the (H/V) spectral ratios from noise recordings in terms of fundamental frequency, amplification bandwidth and amplification level. Similarities and differences between (H/V) spectral ratio of noise and earthquake recordings are presented and discussed. In addition, a dense grid of noise measurements were performed within urban environment of cities affected by strong earthquake (Greece: Thessaloniki, Kalamata, Italy: Palermo). It seems that the (H/V) spectral ratio may satisfactorily indicate areas favorable to the occurrence of higher damage in urban environment. However, quantitative correlation between (H/V) spectral ratio properties and damage distribution (macroseismic intensity, damage grades) in some cases, is difficult to be established given the complexity of parameters involved. |
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File | Description | Size | Format | |
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13_2323.pdf | Proceeding 2323 | 454.11 kB | Adobe PDF | View/Open |
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