Flutter performance of a suspended double-deck flat box girder based on a wind tunnel test and numerical simulation

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (4) : 236-246.

HONG Guang1,2,LI Jiawu1,WANG Jiaying1,WANG Feng1,WANG Jun1,LI Yu1

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Abstract

The paper researches the flutter performance of suspended double-deck flat box girder using the wind tunnel and numerical Simulation. The flutter performance of the suspended double-deck flat box girder is analyzed through modal decomposition, section pressure distribution and flow field modal. The research indicates that under the aerodynamic interference from upper section, the generation、migration and shedding of large-scale vortices at the lower edge of the lower section cause that the lower section occurs the bending-torsional coupling "soft flutter". Moreover, due to the structural static coupling between the upper section and the lower section, the bending-torsional soft flutter at the lower section induces the bending-torsional soft flutter of the double-deck flat box girder.

Key words

Double-deck bridge / Wind tunnel test / Numerical simulation / Soft flutter

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HONG Guang1,2,LI Jiawu1,WANG Jiaying1,WANG Feng1,WANG Jun1,LI Yu1. Flutter performance of a suspended double-deck flat box girder based on a wind tunnel test and numerical simulation[J]. Journal of Vibration and Shock, 2023, 42(4): 236-246

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