Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Relationship between Phase Properties, Significant Duration and PGA from the Earthquake Records of Mw 5.5~6.5

Mw 5.5~6.5 지진동의 위상특성과 계속시간 및 PGA와의 관계

  • 최항 ((주)아이맥스트럭처 기술연구소) ;
  • 윤병익 ((주)아이맥스트럭처)
  • Received : 2018.10.01
  • Accepted : 2018.11.28
  • Published : 2019.01.01
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Abstract

The phase properties of ground acceleration records from Mw 5.5~6.5 earthquakes are analyzed. The interrelationships between phase properties and significant durations, as well as PGA, are clarified through both of theoretical and empirical approaches. The probabilistic characteristics of phase information is also discussed based on previous studies and it is shown that circular normal distribution is the most appropriate probability distribution for the phase angle and phase difference. Whereas those variates can be modeled by Gaussian random variables. From the survey results on the frequency dependency of the phase statistics, a simple model is introduced, which is possible to express the frequency dependency of phase information. It is also shown that the significant duration can be controlled by appropriately chosen standard deviation of phase difference for 4~8Hz frequency band and additional consideration of phase scattering in higher frequency band through a series of Monte Carlo simulations. The source of phase scattering effect is also pointed out and discussed.

Keywords

Acknowledgement

Grant : 저비용.고효율의 공동주택 수직증축 리모델링 기술개발 및 실증, 수직증축 허용에 따른 구조안전 확보 기술개발에 관한 연구

Supported by : 국토교통기술진흥원

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