Wind and Structures

  • 제38권5호
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  • Pages.399-410
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  • 2024
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Temporary aerodynamic countermeasures for flutter suppression of a double-deck truss girder during erection

  • Zewen Wang (Department of Bridge Engineering, Southwest Jiaotong University) ;
  • Bokai Yang (Department of Bridge Engineering, Southwest Jiaotong University) ;
  • Haojun Tang (Department of Bridge Engineering, Southwest Jiaotong University) ;
  • Yongle Li (Department of Bridge Engineering, Southwest Jiaotong University)
  • 투고 : 2023.11.01
  • 심사 : 2024.05.05
  • 발행 : 2024.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

Long-span suspension bridges located in typhoon-prone regions face significant risks of flutter instability, particularly in girder erection. Despite the implementation of aerodynamic countermeasures designed for the service stage, the flutter stability of bridge in girder erection may not meet the required standards. Nowadays, the double-deck truss girder is increasingly common in practical engineering which exhibits different performance from the single-deck truss girder. To gain insights into the flutter performance of this girder type and determine temporary aerodynamic countermeasures for flutter suppression in girder erection, wind tunnel tests were conducted. The effects of affiliated members on the flutter performance were first examined. Subsequently, different aerodynamic countermeasures were designed and their effectiveness was tested. The results indicate that the stabilizers above and below the upper and lower decks are the most effective for the flutter stability of bridge at positive and negative angles of attack, respectively. The higher the stabilizers are, the better the effect on flutter suppression achieves. Considering the feasibility in practical engineering, a temporary stabilizer above the upper deck was considered. It is expected that the results could provide references for the aerodynamic design of double-deck truss girder during erection.

키워드

과제정보

The authors are grateful for the financial supports from the National Natural Science Foundation of Sichuan Province of China (Grants number 2022NSFSC0004, 2022NSFSC0431).

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