Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Development of Cable Excitation System for Evaluating Dynamic Characteristics of Stay Cables

사장교 케이블 동특성 평가를 위한 케이블 가진시스템 개발

  • 김남식 (현대건설기술연구소) ;
  • 정운 (현대건설기술연구소) ;
  • 서주원 (현대건설기술연구소) ;
  • 안상섭 (한국도로공사 도로교통기술원)
  • Published : 2003.08.01
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Abstract

As a critical member of cable-stayed bridges, stay cables play on important role of supporting the entire structure. Traffic, wind or rain-wind induced vibrations of stay cables would be a major cause of degrading both safety and serviceability of the bridge. One of the effective alternatives to solve this problem is to employ the cable dampers. In order to design the cable damper optimally, it is necessary to exactly estimate the dynamic characteristics of the existing cables. To achieve more reliable dynamic properties of stay cables, precise excitations inducing forced vibration are needed. Therefore, in this study, a cable excitation system(exciter) controlled digitally was developed. And to evaluate the performance of the cable exciter developed, a solution of the differential equation of cable motion considering the exciter was derived, Using the cable exciter, sine sweeping and resonance tests on a cable model were carried out to obtain the dynamic characteristics effectively.

사장교에서 케이블은 교량 전체에 있어서 매우 중요한 요소이다. 차량, 바람 혹은 풍우에 의한 케이블의 진동은 교량의 안전성과 사용성을 감소시키는 주요 원인이 되어왔으며 이러한 문제를 해결하는 효과적인 방법중의 하나는 케이블 댐퍼를 설치하는 것이다. 이 케이블 댐퍼를 최적으로 설계하기 위해서는 케이블의 동특성을 정확하게 평가해야 하며 케이블 동특성치를 얻기 위해서는 정확한 가진이 필요하다. 따라서 본 연구에서는 케이블 가진시스템을 개발하고 성능을 평가하기 위해 케이블 가진시스템의 운동방정식을 유도하였으며, 케이블 가진기를 케이블 모형에 설치하여 정현진동실험과 공진진동실험을 수행하여 케이블의 동특성을 효과적으로 구하였다.

Keywords

References

  1. Pacheco, B. M., Fujino, Y, and Sulekh, A, "Estimation Curve for Modal Damping in Stay Cables with Viscous Damper," Journal of Structural Engineering, Vol. 12, 1993, Nos 2-3, pp. 1961-1979.
  2. Yu, Z. and Xu, YL., "Mitigation of Three-Dimensional Vibration of Inclined Sab Cable Using Discrete Oil Dampers-I. Fonnulation," Journal of Sound and Vibration, Vol. 214, 1998, No. 4, pp. 659-673. https://doi.org/10.1006/jsvi.1998.1609
  3. Xu, Y. L. and Yu, Z., "Mitigation of Three-Dimensional Vibration of Inclined Sab Cable Using Discrete Oil Dampers-II. Application," Journal of Sound and Vibration, Vol. 214, 1998, No. 4, pp. 675-693. https://doi.org/10.1006/jsvi.1998.1630
  4. Tabatabai, H. and Mehrabi, A. B., "Design of mechanical viscous dampers for stay cables," Journal of Bridge Engineering, Vol. 5, 2000, No. 2, pp. 114-123. https://doi.org/10.1061/(ASCE)1084-0702(2000)5:2(114)
  5. Takano, H, Ogasawara, M., Ito, N., Shimosato, T., Takeda, K., and Murakami, T., "Vibrational Damper for Cables of the Tsurumi Tsubasa Bridge," Journal of Wind Engineering and Industrial Aerodynamics, 6971, 1997, pp.807-818.
  6. Nakamura, A, Kasuga, A, and Arai, H., "The effects of mechanical dampers on stay cables with high-damping rubber," Construction and Building Material, Vol. 12, 1998, Nos 2-3, pp. 115-123. https://doi.org/10.1016/S0950-0618(97)00013-5
  7. Boumand, Y, "Development of new stay cable dampers," Proceedings IABSE Conference, Malmo, Sweden 2-4 June, 1999.
  8. Hjorth-Hansen, E, Strommen, E, Myrvoll, F., Hansvold, C., and Ronnebrant, R, "Perfonnance of a friction damping device for the cables on Uddevalla cable-stayed bridge," Proc., 4th Int. Symp, on Cable Dyn., A. I. M., Liege, Belgium, 2001, pp. 179-186.
  9. 안상섭, "사장교 케이블용 탄소성 댐퍼의 설계", 대한토목학회논문집, Vol. 22, 제6-A호, 2002, pp. 1401-1410.
  10. Yu, A T., "Vibration damping of stranded cable," Proceedingsof the Society for Experimental Stress Analysis, 9, 1952, pp. 141-158.
  11. Hard, A. R. and Holben, R. O., "Application of the vibration decay test to transmission line conductors," IEEE Transaction on Power Apparatus and Systems PAS-86, 1967, pp. 189-199. https://doi.org/10.1109/TPAS.1967.291835
  12. Oaren R. and Diana, G., "Mathematical analysis of transmission line vibration," IEEE Transaction on Power Apparatus and Systems PAS-88, 1969, pp.1741-1771. https://doi.org/10.1109/TPAS.1969.292291
  13. Seppa, T. O., "Self-damping measurements and energy balance of ACSR Drake," Institute of Electronics Engineers Winter Power Meeting, Conference Paper 71 CP 161-PWR, 1971.
  14. Ramberg, S. E and Griffin, O. M, "Free vibration of taut and slack marine cables," Journal of the Structures Division, Proceedings of the American Society of Civil Engineers, 103, 1977, pp. 2079-2092.
  15. Raoof, M and Huang, Y. P., "Upper-bound prediction of cable damping under cyclic bending," Journal of Engineering Mechanics, Vol. 117, No. 12, 1991, pp. 2729-2747. https://doi.org/10.1061/(ASCE)0733-9399(1991)117:12(2729)
  16. Yamaguchi, H. and Adhikari, R., "Energy-Based Evaluation of Modal Damping in Structural Cables with and without Damping Treatment," Journol of Sound and Vibration, Vol. 181, 1995, No. 1, pp. 71-83. https://doi.org/10.1006/jsvi.1995.0126
  17. Fang, J. and Lyons, G. J., "Structural damping of tensioned pipes with reference to cables," Journal of Sound and Vibration, Vol. 193, No. 4, 1996, pp. 891-907. https://doi.org/10.1006/jsvi.1996.0321
  18. 안상섭 등, "특수 교량 케이블 부재의 진동 저감 기준 연구", 도로연 01-32, 한국도로공사, 2001.
  19. lrvine, M, Cable Structures, Dover Publications Inc., New York., 1981.
  20. 안상섭 등, "교량 진동 감소 장치에 관한 연구", 도로연 00-30, 한국도로공사, 2000.
  21. 김남식, 정 운, "진동법을 이용한 인장 케이블의 장력 추정에 관한 연구", 한국소음진동공학회논문집, Vol. 12, No. 12, 2002, pp. 956-963. https://doi.org/10.5050/KSNVN.2002.12.12.956
  22. Gimsing, N. J., Coble Supported Bridges, John Wiley & Sons, Norwich., 1983.
  23. Chopra, A. K., Dynamics of Structures, Prentice Hall, New Jersey., 1995.
  24. Clough, R. W. and Penzien, J., Dynamics of Structures, McGraw-Hill Co., Singapore., 1993.