Wind and Structures

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Investigation on vortex-induced vibration of a suspension bridge using section and full aeroelastic wind tunnel tests

  • Sun, Yanguo (Research Centre for Wind Engineering, Southwest Jiaotong University) ;
  • Li, Mingshui (Research Centre for Wind Engineering, Southwest Jiaotong University) ;
  • Liao, Haili (Research Centre for Wind Engineering, Southwest Jiaotong University)
  • Received : 2012.09.21
  • Accepted : 2013.05.11
  • Published : 2013.12.25
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Abstract

Obvious vortex induced vibration (VIV) was observed during section model wind tunnel tests for a single main cable suspension bridge. An optimized section configuration was found for mitigating excessive amplitude of vibration which is much larger than the one prescribed by Chinese code. In order to verify the maximum amplitude of VIV for optimized girder, a full bridge aeroelastic model wind tunnel test was carried out. The differences between section and full aeroelastic model testing results were discussed. The maximum amplitude derived from section model tests was first interpreted into prototype with a linear VIV approach by considering partial or imperfect correlation of vortex-induced aerodynamic force along span based on Scanlan's semi-empirical linear model. A good consistency between section model and full bridge model was found only by considering the correlation of vortex-induced force along span.

Keywords

References

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