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Ground-motion prediction equation for South Korea based on recent earthquake records

  • Jeong, Ki-Hyun (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Lee, Han-Seon (School of Civil, Environmental and Architectural Engineering, Korea University)
  • 투고 : 2017.12.19
  • 심사 : 2018.03.22
  • 발행 : 2018.07.25

초록

A ground-motion prediction equation (GMPE) for the Korean Peninsula, especially for South Korea, is developed based on synthetic ground motions generated using a ground motion model derived from instrumental records from 11 recent earthquakes of $M_L$>4.5 in Korea, including the Gyeongju earthquake of Sept. 12. 2016 ($M_L$5.8). PSAs of one standard deviation from the developed GMPE with $M_W$ 6.5 at hypocentral distances of 15 km and 25 km are compared to the design spectrum (soil condition, $S_B$) of the Korean Building Code 2016 (KBC), indicating that: (1) PSAs at short periods around 0.2 sec can be 1.5 times larger than the corresponding KBC PSA, and (2) SD's at periods longer than 2 sec do not exceed 8 cm. Although this comparison of the design spectrum with those of the GMPE developed herein intends to identify the characteristics of the scenario earthquake in a lower-seismicity region such as South Korea, it does not mean that the current design spectrum should be modified accordingly. To develop a design spectrum compatible with the Korean Peninsula, more systematic research using probabilistic seismic hazard analysis is necessary in the future.

키워드

과제정보

연구 과제 주관 기관 : Ministry of Land, Infrastructure and Transport of the Korean government

참고문헌

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