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Smart Structures and Systems Volume 34, Number 3, September 2024 , pages 203-213 DOI: https://doi.org/10.12989/sss.2024.34.3.203 |
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Vehicle-induced vibration mitigation of bridges with stiffness degeneration by pounding tuned mass dampers |
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Xiao-Tong Sun, Zuo-Cai Wang, De-An Li, Yu Xin and Da-You Duan
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| Abstract | ||
| A cracked bridge with reduced stiffness is susceptible to vehicle-induced vibrations above the warning threshold. This study proposes a pounding tuned mass damper (PTMD) with an adjustable mass and double pounding boundaries covered with a viscoelastic material. The PTMD is intended to reduce bridge vibrations caused by vehicle loads. A vehicle-bridge-PTMD coupled equation of motion is established against the engineering background of a continuous steel-concrete composite girder bridge. The bridge performance degradation is evaluated in terms of crack density and stiffness reduction coefficient, which are determined through field crack investigations. The vehicle-induced vibrations of a cracked continuous steel-concrete bridge are then studied while changing the parameters of the designed PTMD. The PTMD effectively reduced the vehicle-induced vibrations of the bridge. The vibration reduction ratio reached 38.9% after applying three PTMDs with a total mass ratio of 2%. On a simply supported steel-concrete composite beam, three PTMDs with a total mass ratio of 2% reduced the vibration amplitudes by 31.4%. | ||
| Key Words | ||
| pounding tuned mass damper; stiffness degradation; vehicle-bridge vibration; vibration mitigation | ||
| Address | ||
| (1) Xiao-Tong Sun, Zuo-Cai Wang, De-An Li, Yu Xin, Da-You Duan: Department of Civil Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China; (2) Zuo-Cai Wang: Anhui Province Infrastructural Safety Inspection and Monitoring Engineering Laboratory, Hefei, Anhui, 23009, China; (3) Yu Xin: Anhui Province Engineering Research Center for Civil Engineering Disaster Prevention and Mitigation, Hefei, Anhui, 230009, China. | ||