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김병민

Kim, Byungmin
Geotechnical Earthquake Engineering Research Group
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Correction factors for GMMs considering site and topographic effects in South Korea

Author(s)
Park, Heon-JoonLee, HyejinKim, Byungmin
Issued Date
2022-01
DOI
10.1007/s10518-021-01229-3
URI
https://scholarworks.unist.ac.kr/handle/201301/54627
Fulltext
https://link.springer.com/article/10.1007%2Fs10518-021-01229-3
Citation
BULLETIN OF EARTHQUAKE ENGINEERING, v.20, no.1, pp.143 - 165
Abstract
In the past five years, the local magnitude (M-L) 5.8 Gyeongju and M(L)5.4 Pohang earthquakes have caused significant damage to the southeastern Korean Peninsula. To evaluate the ground motion recorded during these earthquakes, we compared them with the Korean ground motion models (GMMs), also known as the ground motion prediction equations (GMPEs), Next Generation Attenuation of Ground Motions (NGA) GMMs for Western U.S. and Central and Eastern North America. The ground motions exhibit amplification near a period of 0.1 s compared to the predicted spectral accelerations. These amplifications are likely to be attributed to site and topographic effects. The existing GMMs do not account for the topographic amplification which might be prevalent in the mountainous regions of Korea. Therefore, we propose correction factors for the predicted ground motions for various periods in terms of magnitude, source-to-site distance, V-S30, and relative elevation. The standard deviation values of the residuals significantly decreased by applying these correction models.
Publisher
SPRINGER
ISSN
1570-761X
Keyword (Author)
Site effectTopographic effectCorrection factorsGMMKoreaNGA
Keyword
MODELAMPLIFICATIONACCELERATIONDISTANCEEUROPEREGIONMOTION PREDICTION EQUATIONSGROUND-MOTIONHORIZONTAL COMPONENTSSLOPE TOPOGRAPHY

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