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

被引：6
|
作者：
Katsuchi, Hiroshi [1 ]
Yamada, Hitoshi [1 ]
Nishio, Mayuko [1 ]
Okazaki, Yoko [1 ]
机构：
[1] Yokohama Natl Univ, Dept Civil Engn, Yokohama, Kanagawa 2408501, Japan
来源：
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING | 2016年 / 10卷 / 01期
关键词：
suspension bridge; aerodynamics; simplified girder; wind-tunnel test;
D O I：
10.1007/s11709-015-0311-0
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
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. (C) Higher Education Press and Springer-Verlag Berlin Heidelberg 2016
引用
收藏
页码：93 / 102
页数：10
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