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Wind and Structures
  Volume 12, Number 3, May 2009 , pages 205-217

Aerodynamic Flutter Control for Typical Girder Sections of Long-Span Cable-Supported Bridges
Yongxin Yang and Yaojun Ge

    Aerodynamic flutter control for long-span cable-supported bridges was investigated based on three basic girder sections, i.e. streamlined box girder section, box girder section with cantilevered slabs and two-isolated-girder section. Totally four kinds of aerodynamic flutter control measures (adding fairings, central-slotting, adding central stabilizers and adjusting the position of inspection rail) were included in this research. Their flutter control effects on different basic girder sections were evaluated by sectional model or aeroelastic model wind tunnel tests. It is found that all basic girder sections can get aerodynamically more stabled with appropriate aerodynamic flutter control measures, while the control effects are influenced by the details of control measures and girder section configurations. The control effects of the combinations of these four kinds of aerodynamic flutter control measures, such as central-slotting plus central-stabilizer, were also investigated through sectional model wind tunnel tests, summarized and compared to the flutter control effect of single measure respectively.
Key Words
    Aerodynamic instability; flutter control; cable-supported bridge; fairing, central-slotting; central stabilizer
Yongxin Yang and Yaojun Ge; State Key Lab for Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China

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