한국지구과학회지 제41권 제3호 (p.238-247)

한반도 남부에서 부지효과를 고려한 물리적 지진동 모델링 기반 진도 감쇠 특성 분석 연구

Analysis of Intensity Attenuation Characteristics Using Physics-based Earthquake Ground-motion Simulation with Site Effect in the Southern Korean Peninsula
키워드 :
Korean Peninsula,intensity attenuation,physical earthquake modeling,site effect,VS30

목차

Abstract
요 약
서 론
연구 방법
   강지진동 모사 플랫폼
   부지 효과
   수정 메르칼리 진도
   강지진동 지진파형 모사
연구 결과
   강지진동 지진파형 특성
   부지 효과(VS30) 고려 전과 후의 진도 감쇠 특성
   동일 규모에서 PGA와 PGV 기반 진도 감쇠 특성
논 의
결 론
References

초록

This study simulated strong ground motion waveforms in the southern Korean Peninsula, based on the physical earthquake modeling of the Southern California Earthquake Center (SCEC) BroadBand Platform (BBP). Characteristics of intensity attenuation were investigated for M 6.0-7.0 events, incorporating the site effects. The SCEC BBP is software generates broadband (0-10 Hz) ground-motion waveforms for earthquake scenarios. Among five available modeling methods in the v16.5 platform, we used the Song Model. Approximately 50 earthquake scenarios each were simulated for M 6.0, 6.5, and 7.0 events. Representative metrics such as peak ground acceleration (PGA) and peak ground velocity (PGV) were obtained from the synthetic waveforms that were simulated before and after the consideration of site effects (VS30). They were then empirically converted to distribution of instrumental intensity. The intensity that considers the site effects is amplified at low rather than high VS30 zones.