대한토목학회논문집 (KSCE Journal of Civil and Environmental Engineering Research)

대한토목학회 (Korean Society of Civil Engeneers)
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도로교 내진설계 스펙트럼에 부합하는 표준 PSD함수의 제안

A Proposal of Reference Power Spectral Density Functions Compatible with Highway Bridge Design Specta

  • 최동호 (한양대학교 공과대학 토목공학과) ;
  • 이상훈 (한양대학교 토목공학과, 한국전력기술(주)) ;
  • 고정훈 (한양대학교 토목공학과)
  • 투고 : 2007.06.13
  • 심사 : 2007.11.13
  • 발행 : 2008.01.31
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초록

원전 구조물의 내진해석에서 사용하는 시간이력 함수는 적절한 하중을 보장하기 위하여 설계응답스펙트럼에 부합할 뿐만 아니라 최소 PSD함수 이상의 PSD함수를 갖도록 함으로서 각각의 진동수에서 일정 크기 이상의 에너지를 갖고 있어야 한다. 도로교 구조물에서도 구조물의 대형화와 정교화로 인한 구조물의 공공 기능의 안전성이 더욱 강조되어, 설계 목적의 PSD함수의 규정이 필요하지만 적절한 절차가 개발이 되지 않아 현실적으로 적용하기 어려운 실정이다. 본 연구에서는 다수의 인공지진을 이용하여 표준 PSD함수를 계산하는 절차를 제시하고 현재의 도로교 내진설계 스펙트럼에 부합하는 표준 PSD 함수를 제안하였다.

Acceleration time history used in the seismic analysis of nuclear power plant structures should envelop a target power spectral density (PSD) function in addition to the design response spectrum in order to have sufficient energy at each frequency for the purpose of ensuring adequate load. The safety for complex long-span highway bridges cannot be over-emphasize. An alternative method to improve the seismic capacity is to ensure the minimum PSD function of the applied seismic load. This study proposes a technical scheme to obtain the reference power spectral density function by using artificial earthquakes which are compatible with the highway bridge design spectrum.

키워드

참고문헌

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