논문 상세보기
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.
1. 서 론
2. 위상특성에 관한 기본이론의 고찰
2.1 푸리에 진폭스펙트럼과 위상 스펙트럼
2.2 계속시간과 선형위상
2.3 포락함수의 rms시간과 군 지연시간
2.4 군 지연시간의 확률분포
3. 기록 지진동의 위상차 특성과 계속시간 및 PGA와의 관계
3.1 기록 지진동 개요
3.2 해석개요
3.3 해석결과
3.4 몬테카를로 시뮬레이션(MCS)을 이용한 검토
4. 결 론
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