Aerodynamic Stability of Long Span Suspension Bridge?Effects of Stiffening Truss Width

by Satoshi Okano, Honshu-Shikoku Bridge Authority, Japan,
Sumitaka Kurino, Honshu-Shikoku Bridge Authority, Japan,
Masao Miyazaki, Honshu-Shikoku Bridge Authority, Japan,
Kouji Kazama, Honshu-Shikoku Bridge Authority, Japan,



Document Type: Proceeding Paper

Part of: Structural Design, Analysis and Testing

Abstract:

This paper presents the effects of truss width upon the aerodynamic stability of the long span suspension bridge with truss girder up to 2000 m. It was found that the truss width had a great effect on the aerodynamic stability, and that the aerodynamic stability increased as the truss width became narrower. It was also clarified that such stabilization is caused by the multifunctional effects of the decrease of the exciting component of the aerodynamic force due to the change in the truss width, and the movement of the rotational center to upstream direction.

Subject Headings: Suspension bridges | Trusses | Aerodynamics | Girder bridges | Span bridges | Truss bridges | Wind tunnel

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