Torsional flutter mechanism of two-edge girders for long-span cable-stayed bridge

The aim of this study is to obtain a series of fundamental data on aerodynamic characteristics of two-edge girders, such as flutter instability and vortex-induced vibration. Two-edge girders have, in general, structural and economic advantages for long-span cable-stayed bridges. The effect of geomet...

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Bibliographic Details
Published inJournal of wind engineering and industrial aerodynamics Vol. 90; no. 12; pp. 2127 - 2141
Main Authors Daito, Y., Matsumoto, M., Araki, K.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.12.2002
Subjects
Aerodynamic derivatives
Flutter analysis
Flutter instability
Two-edge girders
Unsteady pressure
Aerodynamic derivatives
Flutter instability
Flutter analysis
Unsteady pressure
Two-edge girders
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Summary:The aim of this study is to obtain a series of fundamental data on aerodynamic characteristics of two-edge girders, such as flutter instability and vortex-induced vibration. Two-edge girders have, in general, structural and economic advantages for long-span cable-stayed bridges. The effect of geometrical shape of girders, their location and incidence angle of flow on the two-edge girders aerodynamics was investigated by a series of wind tunnel tests. The aerodynamic derivatives, associated with flutter instability, are obtained by 1° of freedom (1DOF) heaving/torsional forced vibration method. Furthermore, flutter mechanism is investigated by the unsteady pressure measurement under 1DOF heaving/torsional forced vibration. It is clear that flutter instability of two-edge girders is closely related with the exciting source on the downstream side of upper and lower surface on the deck.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0167-6105
1872-8197
DOI:10.1016/S0167-6105(02)00329-X