Fragility Analysis Method Based on Seismic Performance of Bridge Structure considering Earthquake Frequencies

지진 진동수에 따른 교량의 내진성능기반 취약도 해석 방법

  • Published : 2009.04.30


This paper presents a systematic approach for estimating fragility curves and damage probability matrices for different frequencies. Fragility curves and damage probability indicate the probabilities that a structure will sustain different degrees of damage at different ground motion levels. The seismic damages are to achieved by probabilistic evaluation because of uncertainty of earthquakes. In contrast to previous approaches, this paper presents a method that is based on nonlinear dynamic analysis of the structure using empirical data. This paper presents the probability of damage as a function of peak ground acceleration and estimates the probability of five damage levels for prestressed concrete (PSC) bridge pier subjected to given ground acceleration. At each level, 100 artificial earthquake motions were generated in terms of soil conditions, and nonlinear time domain analyses was performed for the damage states of PSC bridge pier structures. These damage states are described by displacement ductility resulting from seismic performance based on existing research results. Using the damage states and ground motion parameters, five fragility curves for PSC bridge pier with five types of dominant frequencies were constructed assuming a log-normal distribution. The effect of dominant frequences was found to be significant on fragility curves.


  1. 김상훈, Masanobu S., 김종인, “지진으로 인한 교통망 피해추정 기법,” 한국지진공학회 논문집, 8권, 3호, 2004,pp. 43-51.
  2. 건설교통부, 도로교표준시방서, 건설교통부 2005, pp. 471-489
  3. 이대형, 박창규, 정영수, “겹침이음 및 보강된 철근콘크리트 교각의 내진성능평가를 위한 Macro모델,” 대한토목학회 논문집, 밥5A호, 2005, pp. 857-864.
  4. 이대형, “원형 콘크리트 교각의 내진성능 평가에 관한 이론 및 실험적 연구,” 공학박사학위 논문, 중앙대학교, 서울, 1999, pp. .
  5. Computer and Structures, SAP2000/Nonlinear Users Manual Version 8, Computer and Structures, Berkley, CA, USA, 2002, pp. 326-331.
  6. 박창규, “철근콘크리트 교각의 내진성능평가를 위한 심부구속철근비에 관한 연구,” 공학박사학위논문, 중앙대학교, 서울, 2005, pp. 119-124.
  7. 김재천, 변지석, 신수봉, “지반특성 고려한 FCM교량의 지진취약도 분석,” 지진공학회 논문집, 12권, 3호, 2008, 3744 pp.
  8. Kim, S. H. and Masanobu S. H., Development of Fragility Curves of Bridges Retrofitted by Column Jacketing, Probabilistic Engineering Mechanics, Vol. 19, 2004, pp. 105-112.
  9. Hazus, Multihazard Loss Estimation Methodology, Technical Manual, National Institute of Building for the Federal Emergency Management Agency, Washington (DC), 2007, pp. 5-13-5-20.
  10. Karim, K. R. and Yamazaki F., “Effect of Earthquake Ground Motions on Fragility Curves of Highway Bridge Piers Based on Numerical Simulation,” Earthquake Engineering and Structural Dynamics, Vol. 30, 2001, pp. 1839-1856.
  11. 정영수 외, 철근콘크리트 교각의 내진성능평가와 향상에 관한 연구, 지진공학연구센터, 2006, pp. 103-106.
  12. 이대형, 박창규, 정영수, “다 경간교량의 받침조건에 따른 지진취약도 해석,” 대한토목학회 논문집, 27권, 2A호, 2007, pp. 227-236.
  13. Priestley, M. J. N., Seible, F., and Calvi, G. M., Seismic Design and Retrofit of Bridges, John Wiely & Sons Inc., New York, 1996
  14. Chung, Y. S., Shinozuka, M., and Meyer, C., SARCF User's Guide Seismic Analysis of Reinforced Concrete Frames, NCEER, New York, 1988, pp. 2-4-2-5.
  15. Wen, Y. K., Method for Random Vibration of Hysteretic Systems, Journal of the Engineering Mechanics Division, ASCE, Vol. 28, No. EM2, 1976, pp. 1079-1182.
  16. 정영수, 박창영 박지오, “철근콘크리트 교각의 연성능력에 따른 지진취약도,” 콘크리트학회 논문집, 19권, 1호, 2007, pp. 91-102.

Cited by

  1. Evaluation of Seismic Loading of Pile Foundation Structure Considering Soil-foundation-structure Interaction vol.18, pp.3, 2014,