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Study of Critical Flutter Velocities of Bridge Girder Sections with Different Structural Stiffness  

박성종 (대우일렉트로닉스 HA연구소)
권혁준 (한국과학기술원 항공우주공학)
김종윤 (한국과학기술원 항공우주공학)
한재흥 (한국과학기술원 항공우주공학)
이인 (한국과학기술원 항공우주공학)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.17, no.3, 2004 , pp. 271-278 More about this Journal
Abstract
Numerical analysis of wind effects on civil engineering structures was performed. Aerodynamic effect often becomes a governing factor and aeroelastic stability boundary becomes a prime criterion which should be confirmed during the structural design stage of bridges because the long-span suspension bridges are prone to the aeroelastic instabilities caused by wind. If the wind velocity exceeds the critical velocity that the bridge can withstand, then the bridge fails due to the phenomenon of flutter. Navier-Stokes equations were used for the aeroelastic analysis of bridge girder section. The aeroelastic simulation is carried out to study the aeroelastic stability of bridges using both Computational Fluid Dynamic (CFD) and Computational Structural Dynamic (CSD) schemes. Critical flutter velocities were computed for bridges with different stiffness. It was confirmed that the critical flutter velocity of bridge girder section was sensitive to the change of structural stiffness.
Keywords
suspension bridge; aeroelasticity; flutter; structural stiffness; vortex shedding; navier-stokes;
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