Effect of vertical vortex induced vibration on running performance of a long-span urban rail dedicated bridge

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (24) : 251-258.

XIANG Huoyue1, WANG Yishao1, CAI Peihong2, LI Yongle1

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Abstract

Vortex induced vibration (VIV) of urban rail transit bridge will not only affect traffic safety, but also cause adverse social impact. Firstly, the coupling vibration analysis model of the wind-vehicle-bridge (WVB) system considering the effect of VIV and track irregularities is established. Take a long-span urban rail transit self-anchored suspension bridge as an example, the effects of track irregularity, the time of train entering the bridge, train speed, amplitude and order of VIV on running performance were analyzed. Then, the train-bridge vertical system under VIV is simplified into a single degree of freedom model. The relationship between vehicle acceleration response and VIV amplitude is derived, and the calculation formula of VIV amplitude limit of the bridge is given. The results show that the train response generally increases with the increase of the train speed, the order of bridge vibration and the amplitude of VIV, and the randomness of track irregularity and the time of train entering the bridge also have a certain influence on the train response. The derived equation takes vehicle performance into account, and the calculated results are in good agreement with the coupled vibration analysis results of WVB system, which can provide reference for the study of VIV amplitude limits of bridges.

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urban rail dedicated bridge / vortex induced vibration / coupled vibration / wind-vehicle-bridge

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XIANG Huoyue1, WANG Yishao1, CAI Peihong2, LI Yongle1. Effect of vertical vortex induced vibration on running performance of a long-span urban rail dedicated bridge[J]. Journal of Vibration and Shock, 2024, 43(24): 251-258

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