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http://dx.doi.org/10.5000/EESK.2009.13.1.027

Analysis of Site Amplification of Seismic Stations using Odesan Earthquake  

Kim, Jun-Kyoung (세명대학교 자원환경공학과)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.13, no.1, 2009 , pp. 27-34 More about this Journal
Abstract
Site amplification should be considered in order to estimate Soil-Structure Interaction (SSI), seismic source and attenuation parameters with a greater degree of reliability. The horizontal to vertical (H/V) ratio technique, originally proposed by Nakamura (1989), has been applied to analyze the surface waves in microtremor records. Recently, its application has been extended to the shear wave energy of strong motion in order to study the site transfer function. The purpose of this paper is to estimate the H/V spectral ratio using the observed data from 9 seismic stations distributed within the Southern Korean Peninsula, from the Odesan earthquake (2007/01/20). The results show that most of the stations have more stable amplification characteristics in a low frequency band than in a high frequency band. However, each seismic station showed its own characteristic resonant frequency and low and high frequency. The resonant frequency at each station should be estimated carefully, because the quality of seismic data is dependent on the resonant frequency. It can be obtained more reliable results of seismic source and attenuation parameters, if seismic ground motions which deconvolved from site transfer function is used. The site amplification data from this study can be used to generally classify the sites within the Southern Korean Peninsula.
Keywords
site transfer function; H/V spectral ratio; surface wave; resonant frequency;
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Times Cited By KSCI : 2  (Citation Analysis)
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