한국안전학회지 (Journal of the Korean Society of Safety)

  • 제21권6호
  • /
  • Pages.74-81
  • /
  • 2006
  • /
  • 1738-3803(pISSN)
  • /
  • 2383-9953(eISSN)
한국안전학회 (The Korean Society of Safety)
권호 표지

응답면 기법에 의한 아치교량 시스템의 붕괴 위험성평가(I): 요소신뢰성

Risk Assessment for the Failure of an Arch Bridge System Based upon Response Surface Method(I): Component Reliability

  • 조태준 (한국철도시설공단 KR 기술연구소) ;
  • 방명석 (충주대학교 안전공학과)
  • Cho, Tae-Jun (Korea Rail Network Authoroty, KR Technical Research Institute) ;
  • Bang, Myung-Seok (Department of Safety Engineering, Cheongju University)
  • 발행 : 2006.12.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Probabilistic Risk Assessment considering statistically random variables is performed for the preliminary design of a Arch Bridge. Component reliabilities of girders have been evaluated using the response surfaces of the design variables at the selected critical sections based on the maximum shear and negative moment locations. Response Surface Method(RSM) is successfully applied for reliability analyses for this relatively small probability of failure of the complex structure, which is hard to be obtained by Monte-Carlo Simulations or by First Order Second Moment Method that can not easily calculate the derivative terms of implicit limit state functions. For the analysis of system reliability, parallel resistance system composed of girders is changed into parallel series connection system. The upper and lower probabilities of failure for the structural system have been evaluated and compared with the suggested prediction method for the combination of failure modes. The suggested prediction method for the combination of failure modes reveals the unexpected combinations of element failures in significantly reduced time and efforts compared with the previous permutation method or system reliability analysis method.

키워드

참고문헌

  1. Sundararajan, Probabilistic Structural Mechanics handbook, Chapman & Hall, pp. 102-111, 1994
  2. Box, G. E. P., and Wilson, K. B., On the Experimental Attainment of Optimum Conditions, Journal of Royal Statistical Society, Series B13, pp. 1-45, 1951
  3. Nowak A. S., Collins K. R., 'Reliability of Structures' McGraw-Hill, London, 2000
  4. 이성로, 배용귀, '2축 응력 하의 콘크리트 구조물의 신뢰성 해석 및 민감도 해석' 대한토목학회논문집, 제24권, 제34호, pp. 631-637, 2004
  5. Al-Harthy, A. S. and Bucher, C. G., Bourgund, U., Efficient Use of Response Surface Methods, Report No.9-87, Institute of Engineering Mechanics, University of Innsbruck, Austria, 1987
  6. Bucher, C. G., Bourgund, U., Efficient Use of Response Surface Methods, Report No.9-87, Institute of Engineering Mechanics, University of Innsbruck, Austria, 1987
  7. Rackwitz R, Fiessler B., Structural reliability under combined random load sequences, Computers and Structures, Vol. 9, 489-494, 1978 https://doi.org/10.1016/0045-7949(78)90046-9
  8. Nowak, A. S., Yamani, A. S., and Tabsh, S. W., 'Probabilistic Models for Resistance of Concrete Bridge Girders' ACI Structural Journal, Vol. 91, No. 3, pp. 269-276. 1994
  9. Nowak, A. S., 'Report 386 Calibration of LRFD Bridge Design Code' Transportation Research Board National Academy Press, pp. 150-161, 1999