Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Site Classification and Design Response Spectra for Seismic Code Provisions - (I) Database and Site Response Analyses

내진설계기준의 지반분류체계 및 설계응답스펙트럼 개선을 위한 연구 - (I) 데이터베이스 및 지반응답해석

  • Cho, Hyung Ik (Department of Civil and Environmental Engineering, KAIST) ;
  • Satish, Manandhar (Department of Civil and Environmental Engineering, KAIST) ;
  • Kim, Dong Soo (Department of Civil and Environmental Engineering, KAIST)
  • 조형익 (KAIST 건설 및 환경공학과) ;
  • ;
  • 김동수 (KAIST 건설 및 환경공학과)
  • Received : 2016.02.26
  • Accepted : 2016.04.22
  • Published : 2016.07.01
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Abstract

Korea is part of a region of low to moderate seismicity located inside the Eurasian plate with bedrock located at depths less than 30 m. However, the spectral acceleration obtained from site response analyses based on the geologic conditions of inland areas of the Korean peninsula are significantly different from the current Korean seismic code. Therefore, suitable site classification scheme and design response spectra based on local site conditions in the Korean peninsula are required to produce reliable estimates of earthquake ground motion. In this study, site-specific response analyses were performed at more than 300 sites with at least 100 sites at each site categories of $S_C$, $S_D$, and $S_E$ as defined in the current seismic code in Korea. The process of creating a huge database of input parameters - such as shear wave velocity profiles, normalized shear modulus reduction curves, damping curves, and input earthquake motions - for site response analyses were described. The response spectra and site coefficients obtained from site response analyses were compared with those proposed for the site categories in the current code. Problems with the current seismic design code were subsequently discussed, and the development and verifications of new site classification system and corresponding design response spectra are detailed in companion papers (II-development of new site categories and design response spectra and III-Verifications)

Keywords

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  1. Amplification Characteristics of Domestic and Overseas Intraplate Earthquake Ground Motions in Korean Soil and Standard Horizontal Design Spectrum for Soil Sites vol.22, pp.7, 2018, https://doi.org/10.5000/EESK.2018.22.7.391