Tuned Mass Dampers for Wind-Induced Vibration Control of Chongqi Bridge

AbstractChongqi Bridge is part of an important route over the Yangtze River connecting Chongming City in Shanghai with Qidong City in Jiangsu. The steel box-girder bridge consists of separate but adjacent twin six-span bridges, and each is 16 m wide and 944 m long. During construction of the bridge,...

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Bibliographic Details
Published in:Journal of bridge engineering 2020-01, Vol.25 (1)
Main Authors: Sun, Zhen, Zou, Zilong, Ying, Xuyong, Li, Xianqi
Format: Article
Language:English
Subjects:
Acceleration
Accelerometers
Algorithms
Anemometers
Box girder bridges
Box girders
Bridge construction
Case Studies
Case Study
Connecting
Decks
Hurricanes
Rivers
Steel structures
Structural health monitoring
Structural steels
Transducers
Typhoons
Vibration
Vibration control
Vibration isolators
Vibration monitoring
Vibration tests
Vibrations
Vortex-induced vibrations
Wind effects
Wind tunnel testing
Wind tunnels
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Summary:AbstractChongqi Bridge is part of an important route over the Yangtze River connecting Chongming City in Shanghai with Qidong City in Jiangsu. The steel box-girder bridge consists of separate but adjacent twin six-span bridges, and each is 16 m wide and 944 m long. During construction of the bridge, vortex-induced vibration (VIV) was observed, which caused concern about the performance of the bridge. A vibration test was conducted and an eigensystem realization algorithm (ERA) was performed to identify mode properties of the bridge. A wind tunnel test showed that VIV could occur in the first vertical mode, and tuned mass dampers (TMDs) were installed in the four middle spans of the bridge to control large vibrations. A structural health monitoring (SHM) system was also deployed on the bridge and the TMDs, which includes anemometers, accelerometers, displacement transducers, and so on. On July 10–12, 2015, Typhoon Chan-hom passed through the area near Chongqi Bridge. Wind characteristics were calculated with monitoring data, and the response of the bridges and the TMDs were evaluated under Typhoon Chan-hom. The results indicate effectiveness of the TMDs and their functioning under different wind conditions. An effectiveness factor is proposed to describe the functioning of TMD to mitigate deck vibration, which is illustrated with the acceleration measurements of the deck and the TMDs.
ISSN:1084-0702
1943-5592
DOI:10.1061/(ASCE)BE.1943-5592.0001510