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http://dx.doi.org/10.5467/JKESS.2017.38.2.161

The Dynamic Basement Amplification Characteristics of a Dam Site using a Reference Site Method  

Wee, Soung-Hoon (Earthquake Research Center, Korea Institute of Geoscience and Mineral Resources)
Kim, Jun-Kyoung (Department of Fire Protection Engineering, Semyung University)
Yoo, Seong-Hwa (Earthquake Research Center, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Journal of the Korean earth science society / v.38, no.2, 2017 , pp. 161-171 More about this Journal
Abstract
Observed ground motions are composed of three factors such as, seismic source, attenuation, and site amplification effect. Among them, the site amplification characteristics should be considered significantly when estimating seismic source and attenuation characteristics with more confidence. The site effect is also necessary when estimating not only seismic hazard in seismic design engineering but also rock mechanical properties. This study uses the method of H/V spectral ratio of observed ground motion between target site and reference site called a reference site method. In addition to using the vertical Fourier spectrum of the reference site, we try out the horizontal Fourier spectrum as a new method in this study. We analyze H/V spectral ratio of six ground motions respectively, observed at four sites close to Yedang Reservoir. We then compare site amplification effects at each site using 3 kinds of seismic energies including S waves, Coda waves energy, and background noise. The results suggest that each site showed similar site amplification patterns in S waves and Coda waves energy. However, the site amplification of background noise shows much different characteristics from those of S waves and Coda wave energy, which suggests that the background noises at each site have their own developing mechanism. Each station shows its own characteristics of specific resonance frequency and site amplification properties in low, high and specific resonance frequency ranges. Comparison of the method used in this study to the others that used different methods can provide us with more information about the dynamic amplification of a site characteristics and site classification.
Keywords
S wave; Coda wave; background noise; H/V spectral ratio; reference station;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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