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

합성형 사장교의 3차원 공기역학적 특성에 대한 실험적 연구

  • 민인기 (우송정보대학 철도계열) ;
  • 채영석 (우송대학교 건축공학과)
  • Received : 2008.08.18
  • Accepted : 2008.11.24
  • Published : 2008.12.10

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.

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