Seismic Fragility Analysis of a Cable-stayed Bridge with Energy Dissipation Devices

에너지 소산장치를 장착한 사장교의 지진 취약도 해석

  • 박원석 (서울대학교 교량설계핵심기술연구단) ;
  • 김동석 (서울대학교 지구환경시스템공학부) ;
  • 최현석 (서울대학교 지구환경시스템공학부) ;
  • 고현무 (서울대학교 지구환경시스템공학부)
  • Published : 2006.06.30


This paper presents a seismic fragility analysis method for a cable-stayed bridge with energy dissipation devices. Model uncertainties represented by random variables include input ground motions, characteristics of energy dissipation devices and the stiffness of cable-stayed bridge. Using linear regression, we established demand models for the fragility analysis from the relationship between maximum responses and the intensity of input ground motions. For capacity models, we considered the moment and shear force of the main tower, longitudinal displacement of the girder, deviation of the stay cables tension and the local buckling of the main steel tower as the limit states for cable-stayed bridge. As a numerical example, fragility analysis results for the 2nd Jindo bridge are presented. The effect of energy dissipation devices is also briefly discussed.


  1. AASHTO LRFD Bridge Design Specifications, The American Association of State Highway and Transportation Officials, Third Edition, 2004
  2. Bertero, R.D. and Bertero, V.V., 'Performance-based seismic engineering: the need for a reliable conceptual comprehensive approach,' International Journal of Earthquake Engineering and Structural Dynamics, Vol. 31, No. 3, 2002, pp. 627-65
  3. Foschi, R.O., Li, H. and Zhang, J., 'Reliability and performance-based design: a computational approach and applications,' Structural Safety, Vol. 24, 2002, pp. 205-18
  4. Koh, H.M., Ha, D.H., Song, J., Hahm, D. and Kwon, K.J., 'Optimal Design and Cost Effectiveness of SeismicIsolated Bridges Based on Minimum Life-Cycle Cost Concept,' Proc. of International Post-SMiRT Conference Seminar on Seismic Isolation, Passive Energy Dissipation and Active Control of Vibrations of Structure, Korea, 1999. 8, pp. 695-702
  5. 박관순, 고현무, 함대기, '생애주기비용 최소화에 의한 점탄성 감쇠기 장착 구조물의 통합최적설계', 춘계 한국지진공학회 학술발표회 논문집, Vol. 6, No. 1, 2002, pp. 467-474
  6. Choi, E., DesRoches, R. and Nielson, B., 'Seismic fragility of typical bridges in moderate seismic zones,' Journal of Engineering Structures, Vol. 26, 2004, pp. 187-199
  7. Nakamura, T. and Mizatani, M., 'A statistical method for fragility curve development,' Proc., 51 st JSCE Annual Meeting, Vol. 1-A, JSCE, Tokyo, 1996, pp. 938-939
  8. Shinozuka, M., 'Statistical analysis of bridge fragility curves,' Proc., U.S.-Italy Workshop on Protective Systems for Bridges, MCEER, New York State University at Buffalo, Buffalo, 1998
  9. Howard, H., Hwang, M. and Huo, J., 'Seismic fragility analysis of electric substation and structures,' Probabilistic ngineering Mechanics, Vol. 13, No. 2, 1998, pp. 107-116
  10. John, B.M., 'Fragility curve development for assessing the seismic vulnerability of highway bridges,' MCEER Research progress and accomplishments 1997-1999
  11. Masnobu, S., Honorary, M., Feng, M.Q., Jongheon, L. and Toshihiko, N., 'Statistical analysis of fragility curves,' Journal of Engineering Mechanics, Vol. 126, No. 12, 2000, pp. 1224-1231
  12. 김태훈, 유영화, 신현목, '지진하중을 받는 철근콘크리트 교각의 비탄성 거동 및 연성능력에 관한 해석적 연구', 한국지진공학회논문집, 제4권, 제4호, 2000, pp. 37-51
  13. 고현무, 이지호, 강준원, '소성손상모형에 기초한 철근콘크리트 교각의 지진손상평가', 대한토목학회논문집, Vol. 23, No. 5A, 2003, pp. 1029-1039
  14. Dyke, S.J., Spencer, Jr., B.F., Sain, M.K. and Carlson, J.D., 'Modeling and control of magnetorheological dampers for seismic response,' Smart Materials and Structures, Vol. 5, 1996, pp. 565-575
  15. Jansen, L.M. and Dyke, S.J., 'Semiactive control strategies for MR dampers: comparative study,' Journal of Engineering Mechanics, ASCE, Vol. 126, No. 8, 2000, pp. 795-803
  16. Deodatis, G., 'Non-stationary stochastic vector processes: seismic ground motion applications,' Probabilistic Engineering Mechanics, Vol. 11, 1996, pp. 149-167
  17. Gasparini, D.A. and Vanmarche, E.H., 'Simulated earthquake motions compatible with prescribed response spectra,' MIT Report, No. R76-4., 1976
  18. 고현무, 송준호, '사용기간비용 최소화에 의한 지진격리교량의 경제성 평가', 대한토목학회논문집, 대한토목학회, 제 19권, 제 1-4호, 1999, pp. 539-550
  19. Koutsourelakis, S., Prevost, J.H. and Deodatis, G., 'Risk assessment of an interacting structure-soil system due to liquefaction,' Earthquake Engineering and Structural Dynamics, Vol. 31, 2002, pp. 851-879
  20. Hwang, H.M. and Huo, J.R., 'Simulation of earthquake acceleration time histories,' Technical Report, Center for Earthquake Research and Information, University of Memphis, Memphis, 1996
  21. Jennings, P.C., Housner, G.W. and Tsai, N.C., 'Simulated earthquake motions,' Technical Report, Earthquake Engineering Research Laboratory, California Institute of Technology, 1968
  22. 문도수, 배성한, 이경찬, 장승필, '강주탑 사장교의 비선형성을 고려한 지진해석 및 내진성능 평가기법 개발', 대한토목학회 학술대회논문집, 2005, pp. 963-966
  23. HAZUS, Earthquake loss estimation methodology, Technical Manual, National Institute of Building for the Federal Emergency Management Agency, Washington, D.C., 1997