Smart Structures and Systems

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Effect of boundary conditions on modal parameters of the Run Yang Suspension Bridge

  • Li, Zhijun (College of Civil Engineering, Southeast University) ;
  • Li, Aiqun (College of Civil Engineering, Southeast University) ;
  • Zhang, Jian (Department of Civil Engineering, National University of Singapore)
  • Received : 2009.04.23
  • Accepted : 2009.12.15
  • Published : 2010.11.25
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Abstract

Changes in temperature, loads and boundary conditions may have effects on the dynamic properties of large civil structures. Taking the Run Yang Suspension Bridge as an example, modal properties obtained from ambient vibration tests and from the structural health monitoring system of the bridge are used to identify and evaluate the modal parameter variability. Comparisons of these modal parameters reveal that several low-order modes experience a significant change in frequency from the completion of the bridge to its operation. However, the correlation analysis between measured modal parameters and the temperature shows that temperature has a slight influence on the low-order modal frequencies. Therefore, this paper focuses on the effects of the boundary conditions on the dynamic behaviors of the suspension bridge. An analytical model is proposed to perform a sensitivity analysis on modal parameters of the bridge concerning the stiffness of expansion joints located at two ends of bridge girders. It is concluded that the boundary conditions have a significant influence on the low-order modal parameters of the suspension bridge. In addition, the influence of vehicle load on modal parameters is also investigated based on the proposed model.

Keywords

References

  1. Brincker, R., Zhang, L.M. and Andersen, P. (2001), "Modal identification of output-only systems using frequency domain decomposition", Smart Mater. Struct., 10(3), 441-445. https://doi.org/10.1088/0964-1726/10/3/303
  2. Fujino, Y. and Siringoringo, D.M. (2007), "Vibration-based health monitoring of bridges and transportation infrastructures", Proceedings of the 2nd International Conference on Structural Condition Assessment, Monitoring and Improvement (SCAMI-2), China, November.
  3. Gentile, C. and Gallino, N. (2008), "Ambient vibration testing and structural evaluation of an historic suspension footbridge", Adv. Eng. Softw., 39(4), 356-366. https://doi.org/10.1016/j.advengsoft.2007.01.001
  4. He, X.F., Moaveni, B., Conte, J.P., Elgamal, A. and Masri, S.F. (2009), "System identification of Alfred Zampa Memorial Bridge using dynamic field test data", J. Struct. Eng.-ASCE, 135(1), 54-66. https://doi.org/10.1061/(ASCE)0733-9445(2009)135:1(54)
  5. Ko, J.M., Chak, K.K, Wang, J.Y., Ni, Y.Q. and Chan, T.H.T. (2003), "Formulation of an uncertainty model relating modal parameters and environmental factors by using long-term monitoring data", Proc. SPIE, 5057, 298-307.
  6. Ko, J.M. and Ni, Y.Q. (2005), "Technology developments in structural health monitoring of large-scale bridges", Eng. Struct., 27(12), 1715-1725. https://doi.org/10.1016/j.engstruct.2005.02.021
  7. Li, A.Q., Miao, C.Q., Li, Z.X., Han, X.L., Wu, S.D., Ji, L. and Yang, Y.D. (2003), "Health monitoring system for the Run Yang Yangtse River Bridge", J. Southeast Univ. (Natural Science Edition), 33(5), 544-548.
  8. Magalhaes, F., Cunha, A. and Caetano, E. (2008), "Dynamic monitoring of a long span arch bridge", Eng. Struct., 30(11), 3034-3044. https://doi.org/10.1016/j.engstruct.2008.04.020
  9. Ni, Y.Q., Hua, X.G., Wong, K.Y. and Ko, J.M. (2007), "Assessment of bridge expansion joints using long-term displacement and temperature measurement", J. Perform. Constr. Fac., 21(2), 143-151. https://doi.org/10.1061/(ASCE)0887-3828(2007)21:2(143)
  10. Ren, W.X., Blandford, G.E. and Harik, I.E. (2004), "Roebling suspension bridge. I: finite-element model and free vibration response", J. Bridge Eng., 9(2), 110-118. https://doi.org/10.1061/(ASCE)1084-0702(2004)9:2(110)
  11. Sohn, H., Dzwonczyk, M., Straser, E.G., Kiremidjian, A.S., Law, K.H. and Meng, T. (1999), "An experimental study of temperature effect on modal parameters of the Alamosa Canyon Bridge", Earthq. Eng. Struct. D., 28(8), 879-897. https://doi.org/10.1002/(SICI)1096-9845(199908)28:8<879::AID-EQE845>3.0.CO;2-V

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