Improvement of aerodynamic stability of suspension bridges with H-shaped simplified stiffening girder

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• 作者：Hiroshi Katsuchi ; Hitoshi Yamada…
• 关键词：suspension bridge ; aerodynamics ; simplified girder ; wind ; tunnel test
• 刊名：Frontiers of Architecture and Civil Engineering in China
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：10
• 期：1
• 页码：93-102
• 全文大小：1,561 KB
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• 作者单位：Hiroshi Katsuchi (1)
  Hitoshi Yamada (1)
  Mayuko Nishio (1)
  Yoko Okazaki (1)
  
  1. Department of Civil Engineering, Yokohama National University, Yokohama, 240-8501, Japan
  
• 刊物类别：Engineering
• 刊物主题：Civil Engineering
  Cities, Countries and Regions
  Chinese Library of Science
  
• 出版者：Higher Education Press, co-published with Springer-Verlag GmbH
• ISSN：1673-7512

文摘

Wind-tunnel study on the improvement of aerodynamic stability of simplified suspension-bridge girder structures was conducted with using a 1/40-scaled section model. Objective of the study is the development of an economically superior suspension bridge with 500–1,000 m center span length. The wind-tunnel test showed that an edge-girder type cross section exhibited large amplitude torsional vortex-induced vibration as well as torsional flutter at a low wind speed. Accordingly, aerodynamic countermeasures of open grating deck and triangular faring, and structural countermeasures of center stay, diagonal bracing and mass increase were tried to improve the aerodynamic stability. Finally, feasibility of the best combination to a full-scale bridge was examined by structural analysis. Keywords suspension bridge aerodynamics simplified girder wind-tunnel test