基于气动措施和滑轮式TMD的人行景观桥涡振混合控制研究

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Abstract To address the issue of excessive static elongation of the spring in traditional Tuned Mass Dampers (TMD) used for controlling low-frequency vibrations in bridge structures, this paper introduces pulley-type TMD and their characteristics when it is used for structural vibration control, and points out that pulley-type TMD can effectively reduce the spring static elongation. Taking a pedestrian landscape bridge as an example, the effectiveness of aerodynamic measures and pulley-type TMD in controlling vortex-induced vibrations (VIV) of the bridge is investigated. Wind tunnel test results demonstrate that, with optimal aerodynamic measures, the VIV amplitude of the main girder is reduced by more than half, but it still does not meet the comfort requirements for pedestrians. Based on the Scanlan linear vortex excitation force model for the optimal design of pulley-type TMD, the vortex vibration control is further supplemented by pulley-type TMD based on aerodynamic measures. The results of the analysis show that aerodynamic measures combined with pulley-type TMD for VIV control can meet the pedestrian comfort requirements and ensure that the working stroke of the pulley-type TMD mass block does not exceed the limits. By simultaneously utilizing aerodynamic measures and pulley-type TMD, multiple requirements such as the VIV limit of the main girder, spring static elongation and working stroke of the pulley-type TMD can be met, effectively controlling the occurrence of VIV in the main girder. The proposed hybrid solution provides valuable insights for VIV control in similar engineering projects and offers guidance for engineering practice.

Key words： Tuned Mass Damper Vortex-Induced Vibration control Aerodynamic measures Pulley-type TMD Pedestrian comfort

Received: 25 June 2023 Published: 28 May 2024

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	Articles by authors
	CHEN Zhi1
	FENG Zhouquan1
	CHEN Jinlin1
	SUN Xiugui2
	HUA Xugang1

Cite this article:

CHEN Zhi1,FENG Zhouquan1,CHEN Jinlin1, et al. Hybrid control of the vortex-induced vibration of a pedestrian landscape bridge based on aerodynamic measures and pulley-type TMD[J]. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(10): 140-148.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2024/V43/I10/140

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