Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Fatigue Reliability Evaluation of Steel-Composite High-Speed Railway Bridge with Tuned Mass Damper

동조질량감쇠기를 장착한 강합성형 고속철도교의 피로신뢰성 평가

  • 강수창 (서울대학교 지구환경시스템공학부) ;
  • 서정관 (서울대학교 지구환경시스템공학부) ;
  • 고현무 (서울대학교 지구환경시스템공학부) ;
  • 박관순 (동국대학교 건축공학부)
  • Published : 2005.10.01
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Abstract

This study proposes a fatigue reliability evaluation procedure for steel-composite high-speed railway bridge based on dynamic analysis and investigates the effectiveness of Tuned Mass Damper(TMD) in terms of the extension of fatigue life of the bridge. For the fatigue reliability evaluation, the limit state is determined using S-N curve and linear fatigue-damage accumulation. Dynamic analyses are peformed repeatedly to consider the uncertainties of train-velocity and damping ratio of the bridge. The distribution of random variables related to fatigue damage for the intended service life is then statistically estimated from analytical results. Finally, the fatigue reliability indices are obtained by means of the Advanced First-Order Second-Moment (AFOSM) method. Through numerical simulation of a steel-composite bridge of 40m span, the effectiveness of TMD on fatigue life of the bridge is examined and the results are presented.

본 연구에서는 고속철도 강합성형 교통비 동적해석에 기반한 피로신뢰성평가 기법을 제시하고 동조질량감쇠기의 효과를 피로수명연장 측면에서 검토하였다. 피로 신뢰성 평가를 수행하기 위하여 S-N 곡선 및 선형누적손상이론을 이용하여 한계상태식을 설정하였다. 열차 속도와 교량 감쇠비의 불확실성을 고려하여 교량에 대한 반복적인 동적해석을 수행하고, 이 결과로부터 전체 교량수명동안에 교량이 받는 피로 손상도와 연관된 확률변수의 특성을 통계적으로 추정하였다. 최종적으로 결정된 확률변수와 한계상태식에 개선된 일계이차모멘트법(AFOSM)을 적용하여 피로 신뢰도 지수를 산정하였다. 40m 지간 강합성교량의 수치모사로부터 동조질량감쇠기 장착여부에 따라 피로 신뢰도 지수를 평가하고 그 결과를 제시하였다.

Keywords

References

  1. Brozzetti, J., 'Design Development of Steel-Concrete Composite Bridges in France,' Journal of Construction Steel Research, Vol. 55, 2000, pp. 229-243 https://doi.org/10.1016/S0143-974X(99)00087-5
  2. Kwon, H.-C., Kim, M.-C. and Lee, I.-W., 'Vibration control of bridges under moving loads,' Computers & Structures, Vol. 66, No. 4, 1998, pp. 473-480 https://doi.org/10.1016/S0045-7949(97)00087-4
  3. Wang, J.F., Lin, C.C. and Chen, B.L., 'Vibration suppression for high-speed railway bridges using tuned mass dampers,' International Journal of Solids and Structures, Vol. 40, 2003, pp. 465-491 https://doi.org/10.1016/S0020-7683(02)00589-9
  4. Yau, J.D. and Yang, Y.B., 'Vibration reduction for cable-stayed bridges traveled by high-speed trains,' Finite Elements in Analysis and Design, Vol. 40, 2004, pp. 341-359 https://doi.org/10.1016/S0168-874X(03)00051-9
  5. 포항산업과학연구원 철강엔지니어링센터, '고속철도 합성형교량 설계요령', 1998, pp. 33-36
  6. Miner, M.A., 'Cumulative damage in fatigue,' Journal of Applied Mechanics, Vol.12, No.3, 1945, pp. A-159-A-164
  7. Wirsching, P.H., 'Fatigue reliability for offshore structures,' Journal of Structural Engineering, ASCE, Vol. 110, No. 10, 1984, pp. 2340-2356 https://doi.org/10.1061/(ASCE)0733-9445(1984)110:10(2340)
  8. Wirsching, P.H., 'Probabilistic fatigue analysis,' Probabilistic structural mechanics handbook [chapter 7], New York: Chapman & Hall Ltd., 1995, pp.146-155
  9. 양영순, 서용석, 이재옥, '구조 신뢰성 공학', 서울대학교 출판부, 서울대학교, 1999
  10. AASHTO LRFD Bridge design specification, AASHTO, 2004
  11. Cheung, M.S. and Li, W.C., 'Probabilistic fatigue and fracture analyses of steel bridges', Structural Safety, Vol. 23, 2003, pp. 245-562
  12. 장동일, '구조공학에서의 파괴와 피로', 동명사, 1999
  13. Sobczyk, K. and Spencer Jr., B.F., Random fatigue: from data to theory, Academic Press, Inc., San Diego, Calif, 1992
  14. Fryba, L., Dynamics of Railway Bridges 2nd ed, Tomas Telford, London, 1996
  15. Haldar, A. and Mahadevan, S., Probability, Reliability and Statistical Methods in Engineering Design, John Wiley & Sons, Inc. New York, 2000
  16. Hambly, B.C., Bridge Deck Behavior, Chapman and Hall, 1976
  17. Den Hartog, J.P., Mechanical Vibrations, 4th Ed., McGraw Hill, Inc., New York, 1985
  18. Ian Bucknall, New Eurocode requirement for the design of high-speed railway bridge, IABSE Symposium 2003, Antwerp, Belgium, August 27-29, 2003

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