Moving Load Analysis of Bridge Structures Using Experimental Modal Data

실험적 모우드 계수를 이용한 교량의 주행하중 해석

  • 이형진 (창원대학교 공과대학 토목공학과)
  • Published : 2002.09.01


This paper proposed a technique of structural re-analysis for the evaluation of dynamic responses of bridge structure under moving loads using experimental modal results. For successful structural re-analysis, it is required to have accurate estimation techniques of the modal characteristics of bridge structures. The natural frequencies and mode shapes were identified by direct fourier analysis techniques and damping ratios by the random decrement method, respectively. An interpolation method was also proposed for the extension of mode shape measured on limited DOFs. Second, the structural reanalysis was performed using moving mass model and identified modal parameters. The results from the reanalysis show that the proposed technique is very reasonable to evaluate the actual behavior of bridge structures under moving loads.


  1. Hoshiya, Masaru and Sutoh, Atsushi, Kalman Filter-Finite Element Method in Identification, J. of Engrg Mech., ASCE, Vol. 119, No. 2, 1993, pp.197-210
  2. Bao, Z. W. and Ko, J. M., Determination of Modal Parameters of Tall Buildings with Ambient Vibration Measurements, The Int. J. of Analytical and Experimental Modal Analysis, Vol. 6, No. 1, 1991, pp.57-68
  3. Hjelmstad, K. D. and Banan, M. R., Time- Domain Parameter Estimation Algorithm for Structures. I : Computational Aspects, J. of Engrg Mech., ASCE, Vol. 121, No. 3, 1995, pp.424-434
  4. Feng, M. Q., Kim, J-M., and Xue, H., 'Identification of a dynamic system using ambient vibration measurements', Journal of Applied Mechanics, ASME, Vol. 65, No. 4, 1998, pp.1010-1021
  5. 김재민, 이형진, 윤정방, '상시미진동 계측기록을 이용한 구조재해석', 한국토목공학회논문집, 제20권, 6-A호, 2000, pp.913-925
  6. Cole, H. J., On-line failure detection and damping measurement of aerospace structures by random decrement signatures, NASA Cr-2205, 1973
  7. Yang, J. C. S., Chen, J., and Dagalakis, N. G., Damage detection in offshore structures by the random decrement technique, Journal of Energy Resources Technology, ASME, 106, 1984, pp.38-42
  8. Kim, J.-T., Assessment of Relative Impact of Model Uncertainty on the Accuracy of Nondestructive Damage Detection in Structures, Ph. D. Dissertation, Dept. of Civil Engrg,, Texas A & M University, 1993
  9. Tsou, Poyu and Shen, M.-H. Herman, Structural Damage Detection and Identification Using Neural Networks, AIAA Journal, Vol. 32, No. 1, January 1994
  10. Maia, Nuno M. M. and Silva, Julio M. M. e, Theoretical and Experimental Modal Analysis, Research Studies Press, Ltd., Hertfordshire, England, 1998
  11. 김학수, 양경택, '부분적 측정데이타를 이용한 구조시스템의 추정기법', 한국전산구조공학회논문집, 제13권, 제1호, 2000, pp.75-85
  12. Cai, Y., Chen, S. S., Rote, D. M. and Coffey, H. T., 'Vehicle/Guideway Interaction for High Speed Vehicles on Flexible Guideway', J. of Sound and Vibration, Vol. 175, No. 5, 1994, pp.625-646
  13. Ting, E. C., Genin, J. and Ginsberg, J. H., 'A General Algorithm for Moving Mass Problems', J. of Sound and Vibration, Vol. 33, No. 1, 1974, pp.49-58
  14. 장승필, 임성순, 조서경, '불규칙한 노면을 주행하는 이동하중에 의한 연속교의 동적거동에 관한 이론 및 실험적 연구', 대한토목학회논문집, Vol. 9, No. 3, 1989, pp.21-30
  15. Wilson, E. L. and Habibullah, SAP90 Structural Analysis Program, Computer and Structures, California, 1992
  16. 김호경 , 서정인, '현수교의 정착 형식에 따른 이동하중에 의한 동적 응답의 비교', 한국강구조학회 논문집, 2000, Vol. 12, No. 1, pp.103-110
  17. 윤정방, 이진학, 이종원, 김재동, 정환욱, '교통하중에 의한 상시진동계측기록을 이용한 교량의 손상추정기법', 한국전산구조공학회논문집, 제14권, 제1호, 2001, pp.77-85