Journal of the Earthquake Engineering Society of Korea 제22권 제7호 (통권 제126호) (p.391-399)

국내외 판내부 지진기록을 사용한 국내 지반의 지반운동 증폭특성 규명 및 토사지반의 표준설계응답스펙트럼의 제안

Amplification Characteristics of Domestic and Overseas Intraplate Earthquake Ground Motions in Korean Soil and Standard Horizontal Design Spectrum for Soil Sites
키워드 :
Seismic design code,Standard design spectrum,Rock site,Soil site,Site coefficient,Intraplate earthquake


1. 서 론
2. 내진설계기준 공통적용사항의 현황
3. 지반증폭계수 Fa와 Fv의 재산정
4. 토사지반의 표준설계응답스펙트럼
5. 결 론


The site coefficients in the common requirements for seismic design codes, which were promulgated in 2017, were reevaluated and the standard design spectrum for soil sites were newly proposed in order to ensure the consistency of the standard design spectra for rock and soil sites specified in the common requirements. Using the 55 ground motions from domestic and overseas intraplate earthquakes, which were used to derive the standard design spectrum for rock sites, as rock outcropping motions, site response analyses of Korean soil were performed and its ground-motion-amplification was characterized. Then, the site coefficients for soil sites were reevaluated. Compared with the existing site coefficients, the newly proposed short-period site coefficient Fa increased and the long-period site coefficient Fv decreased overall. A new standard design spectrum for soil sites was proposed using the reevaluated site coefficients. When compared with the existing design spectrum, it could be seen that the proposed site coefficients and the standard design spectrum for soil sites were reasonably derived. They reflected the short-period characteristics of earthquake and soil in Korea.