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An Experimental Study on 3-Dimension Aerodynamic Properties of Composite Cable Stayed Bridge  

Min, In Ki (우송정보대학 철도계열)
Chae, Young Suk (우송대학교 건축공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.20, no.6, 2008 , pp. 741-750 More about this Journal
Abstract
The aim of this study was to analyze the aerodynamic properties of the composite cable-stayed bridge by conducting three-dimensional wind tunnel tests. Focusing on the improved section of the bridge in the two-dimensional wind tunnel tests, the bridge's aerodynamic stability was estimated based on the angles of attack and the wind angles. The aerodynamic properties of vertical galloping, torsion galloping,and torsion flutter were also estimated based on the design wind velocity, and because much of the cable-stayed bridge was constructed using FCM, it was not sufficiently stiff during the bridge's construction. Therefore,the experience progressed by stages: from the full stage to the tow stage, and until the bridge became a single tower. Since the original plane was designed to be a steel box girder, the aerodynamic properties of the steel-box-type and composite-type girder could be compared. The results of this study can be utilized as basic data regarding the aerodynamic properties of medium-length and short composite cable-stayed bridges.
Keywords
wind tunnel test; aerodynamic properties; steel composite cable stayed; aerodynamic stability;
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