Structural Engineering and Mechanics

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Seismic vibration control for bridges with high-piers in Sichuan-Tibet Railway

  • Chen, Zhaowei (School of Mechanotronics & Vehicle Engineering, Chongqing Jiaotong University) ;
  • Han, Zhaoling (State Key Laboratory of Traction Power, Southwest Jiaotong University) ;
  • Fang, Hui (Electric Power Research Institute, State Grid Chongqing Electric Power Company) ;
  • Wei, Kai (MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University)
  • Received : 2017.12.18
  • Accepted : 2018.04.01
  • Published : 2018.06.25
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Abstract

Aiming at widely used high-pier bridges in Sichuan-Tibet Railway, this paper presents an investigation to design and evaluate the seismic vibration reduction effects of several measures, including viscous damper (VD), friction pendulum bearing (FPB), and tuned mass damper (TMD). Primarily, according to the detailed introduction of the concerned bridge structure, dynamic models of high-pier bridges with different seismic vibration reduction (SVR) measures are established. Further, the designs for these SVR measures are performed, and the optimal parameters of these measures are investigated. On this basis, the vibration reduction effects of these measures are analyzed and assessed subject to actual earthquake excitations in Wenchuan Earthquake (M=8.0), and the most appropriate SVR measure for high-pier bridges in Sichuan-Tibet Railway is determined at the end of the work. Results show that the height of pier does not obviously affect the performances of the concerned SVR measures. Comprehensively considering the vibration absorption performance, installation and maintenance of all the employed measures in this paper, TMD is the best one to absorb vibrations induced by earthquakes.

Keywords

Acknowledgement

Supported by : Southwest Jiaotong University

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