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http://dx.doi.org/10.7843/kgs.2012.28.3.25

Verification of 2-Parameters Site Classification System and Site Coefficients (I) - Comparisons with Well-known Seismic Code and Site Response Characteristics  

Lee, Sei-Hyun (Dept. of Structural System and Site Evaluation, Korea Institute of Nuclear Safety)
Sun, Chang-Guk (Korea Earthquake Research Center, Korea Institute of Geoscience and Mineral Resources)
Ha, Jeong-Gon (Dept. of Civil and Environmental Engineering, KAIST)
Kim, Dong-Soo (Dept. of Civil and Environmental Engineering, KAIST)
Publication Information
Journal of the Korean Geotechnical Society / v.28, no.3, 2012 , pp. 25-34 More about this Journal
Abstract
In order to verify that the recently proposed two-parameters site classification system and the corresponding site coefficients are suitable for the local geological conditions in Korea, a comparison was conducted with current Korean seismic code, Eurocode-8, NYC DOT seismic code. The design spectrum of the current Korean seismic code is significantly amplified in the long-period range, whereas the other response spectra, including the proposed two-parameters approach, are significantly amplified in the short-period range, which is a typical geological condition in Korea. In addition, based on the results of site response analyses in the specific $10km{\times}10km$ area of Gyeongju, spatial distributions of site coefficients from site-specific seismic response analyses were compared with the proposed site coefficients, as well as those specified in the current Korean seismic code. The site coefficients ($F_a$ and $F_v$) from the current Korean seismic codes show significantly high spatial error distributions compared with those specified by the two-parameters site classification system. Therefore, the proposed system is suitable for regions of shallow bedrock including the Korean peninsula.
Keywords
Design response spectrum; Geological conditions; Seismic design code; Site coefficients; Two-parameters site classification system;
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