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Wind and Structures Volume 23, Number 5, November 2016 , pages 405-420 DOI: https://doi.org/10.12989/was.2016.23.5.405 |
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Flutter suppression of long-span suspension bridge with truss girder |
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Kai Wang, Haili Liao and Mingshui Li
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| Abstract | ||
| Section model wind tunnel test is currently the main technique to investigate the flutter performance of long-span bridges. Further study about applying the wind tunnel test results to the aerodynamic optimization is still needed. Systematical parameters and test principle of the bridge section model are determined by using three long-span steel truss suspension bridges. The flutter critical wind at different attack angles is obtained through section model flutter test. Under the most unfavorable working condition, tests to investigate the effects that upper central stabilized plate, lower central stabilized plate and horizontal stabilized plate have on the flutter performance of the main beam were conducted. According to the test results, the optimal aerodynamic measure was chosen to meet the requirements of the bridge wind resistance in consideration of safety, economy and aesthetics. At last the credibility of the results is confirmed by full bridge aerodynamic elastic model test. That the flutter reduced wind speed of long-span steel truss suspension bridges stays approximately between 4 to 5 is concluded as a reference for the investigation of the flutter performance of future similar steel truss girder suspension bridges. | ||
| Key Words | ||
| steel truss; suspension bridge; section model; aerodynamic measure; wind tunnel testing | ||
| Address | ||
| Kai Wang: Research Centre for Wind Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China; Sichuan Railway Investment Group Company Limited, Chengdu, Sichuan 610041, China Haili Liao and Mingshui Li: Research Centre for Wind Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China | ||