Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Stochastic Strong Ground Motion Simulation at South Korean Metropolises' Seismic Stations Based on the 2016 Gyeongju Earthquake Causative Fault

2016년 경주지진 원인단층의 시나리오 지진에 의한 국내 광역도시 지진관측소에서의 추계학적 강진동 모사

  • Choi, Hoseon (Department of Nuclear Safety Research, Korea Institute of Nuclear Safety)
  • 최호선 (한국원자력안전기술원 원자력안전연구실)
  • Received : 2021.05.29
  • Accepted : 2021.07.15
  • Published : 2021.11.01
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Abstract

The stochastic method is applied to simulate strong ground motions at seismic stations of seven metropolises in South Korea, creating an earthquake scenario based on the causative fault of the 2016 Gyeongju earthquake. Input parameters are established according to what has been revealed so far for the causative fault of the Gyeongju earthquake, while the ratio of differences in response spectra between observed and simulated strong ground motions is assumed to be an adjustment factor. The calculations confirm the applicability and reproducibility of strong ground motion simulations based on the relatively small bias in response spectra between observed and simulated strong ground motions. Based on this result, strong ground motions by a scenario earthquake on the causative fault of the Gyeongju earthquake with moment magnitude 6.5 are simulated, assuming that the ratios of its fault length to width are 2:1, 3:1, and 4:1. The results are similar to those of the empirical Green's function method. Although actual site response factors of seismic stations should be supplemented later, the simulated strong ground motions can be used as input data for developing ground motion prediction equations and input data for calculating the design response spectra of major facilities in South Korea.

Keywords

Acknowledgement

이 연구는 한국원자력안전재단이 출원한 원자력안전연구사업(과제번호 1705010-0521-SB130)의 지원을 받아 한국원자력안전기술원에서 수행하였습니다. 원고의 개선을 위해 세심한 조언을 해주신익명의 심사위원들께 감사드립니다.

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