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Structural Engineering and Mechanics Volume 88, Number 4, November25 2023 , pages 379-387 DOI: https://doi.org/10.12989/sem.2023.88.4.379 |
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Vibration suppression analysis of a long-span cable-stayed bridge based on earthquake-wind-traffic-bridge coupled system |
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Xinfeng Yin, Yong Liu, Wanli Yan, Yang Liu and Zhou Huang
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| Abstract | ||
| Wind and earthquake loads may cause strong vibrations in large-span cable-stayed bridges, leading to the inability of the bridge to operate normally. An improved Pounding Tuned Mass Damper (PTMD) system was designed to improve the safety of the large-span cable-stayed bridge. The vibration control effect of the improved PTMD system on the large-span cablestayed bridge under the combined action of earthquake-wind-traffic was studied. Furthermore, the impact of different parameters on the vibration suppression performance of the improved PTMD system was analyzed. The numerical results indicate that the PTMD system is very effective in suppressing the displacements of the bridge caused by both the traffic-wind coupling and traffic-earthquake coupling. Moreover, the number, mass ratio, pounding stiffness, and gap values have a significant influence on the vibration suppression performance of the improved PTMD system. When the number of PTMD is increased from 3 to 9, the vibration reduction ratio of the vertical displacement is increased from 25.39% to 48.05%. As the mass ratio changes from 0.5% to 2%, the vibration reduction ratio increases significantly from 22.23% to 53.30%. | ||
| Key Words | ||
| cable-stayed bridge; earthquake-wind-traffic-bridge coupled system; pounding tuned mass damper; vibration suppression | ||
| Address | ||
| Xinfeng Yin, Wanli Yan, Yang Liu and Zhou Huang: School of Civil Engineering, Changsha University of Science & Technology, Changsha 410114, Hunan, China Yong Liu: School of Civil Engineering, Changsha University of Science & Technology, Changsha 410114, Hunan, China; Hubei Communications Investment Construction Group Co. Ltd., Wuhan, 430070, China | ||