Wind and Structures

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Experimental studies on possible vortex shedding in a suspension bridge - Part I - Structural dynamic characteristics and analysis model

  • Law, S.S. (Civil and Structural Engineering Department, Hong Kong Polytechnic University) ;
  • Yang, Q.S. (Bridge Engineering Department, Beijing Jiao Tung University) ;
  • Fang, Y.L. (Mechanical Engineering Department, Tai Yuen University)
  • Received : 2006.11.03
  • Accepted : 2007.11.11
  • Published : 2007.12.25
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Abstract

The suspension bridge is situated in an area of complex topography with both open sea and overland turbulence characteristics, and it is subject to frequent typhoon occurrences. This paper investigates experimentally the possible vortex shedding events of the structure under high wind and typhoon conditions. A single-degree-of-freedom model for the vibration of a unit bridge deck section is adopted to determine the amplitude of vibration and to estimate the parameters related to the lifting force in a vortex shedding event. The results of the studies are presented in a companion paper (Law, et al. 2007). In this paper, statistical analysis on the measured responses of the bridge deck shows that the vibration response at the first torsional mode of the structure has a significant increase at and beyond the critical wind speed for vortex shedding as noted in the wind tunnel tests on a section model of the structure.

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References

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Cited by

  1. Experimental study on possible vortex shedding in a suspension bridge - Part II - Results when under typhoon Babs and York vol.10, pp.6, 2007, https://doi.org/10.12989/was.2007.10.6.555
  2. Experimental Explorations of the Torsional Vortex-Induced Vibrations of a Bridge Deck vol.21, pp.12, 2016, https://doi.org/10.1061/(ASCE)BE.1943-5592.0000941