Energy Response and Parameter Optimization of Continuous Girder Bridge with Friction Pendulum Bearing

DOI: https://doi.org/10.62517/jes.202402103

Author(s)

Chong Fu

Affiliation(s)

Institute of Mechanical Metrology, Henan Institute of Metrology, Zhengzhou, China

Abstract

Taking 4-span continuous beam bridge of high speed railway as the research object, the nonlinear dynamic model of isolation bridge with friction pendulum bearing (FPB) was established, and the energy response curves of isolation bridge under the earthquake wave of EI Centro were obtained. The friction coefficient and sliding radius of FPB were optimized based on the amplitude of response energy. The results showed that FPB had good energy dissipation capacity, which can effectively improve the seismic performance of bridge; when the seismic intensities were 7 and 8, the optimal friction coefficients were 0.03-0.04 and 0.05-0.06, and the optimal sliding radius were 2m and 2.5m. The friction coefficient needed to be increased properly with the increase of seismic intensity, and the isolation effect was basically unchanged when a certain value of sliding radius was reached.

Keywords

Friction Pendulum Bearing; Continuous Girder Bridge; Dynamic Model; Energy Response; Friction Coefficient; Sliding Radius

References

[1] Matsuzaki H. Time-dependent seismic reliability of isolated bridges considering ageing deterioration of lead rubber bearings. Structure and Infrastructure Engineering, 2022, 18(10-11): 1526-1541. [2] Hassan A L, Billah A M. Influence of ground motion duration and isolation bearings on the seismic response of base-isolated bridges. Engineering Structures, 2020, 222:111129.F [3] Zhang H, Li J, Peng T. Development and mechanical performance of a new kind of bridge seismic isolator for low seismic regions. Shock and Vibration, 2013, 20(4): 725-735. [4] Khoshnoudian F, Hemmati T A. Impact of structures with double concave friction pendulum bearings on adjacent structures. Proceedings of the Institution of Civil Engineers-Structures and Buildings, 2014, 167(1): 41-53. [5] He W, Jiang L, Wei B, et al. The influence of pier height on the seismic isolation effectiveness of friction pendulum bearing for Double-Track railway bridges//Structures. Elsevier, 2020, 28: 1870-1884. [6] Li Zhongxian, Zhang Haipiing, Luo Yunbia. Influence of vertical component of ground motion on seismic isolating performance of friction pendulum bearings isolated viaduct. Earthquake Engineering and Engineering Dynamic, 2018, 38(6): 8-17. [7] Ivan Delgado, Roberto Aguiar, Pablo Caiza. Bilinear model proposal for seismic analysis using triple friction pendulum (TFP) bearings. Open Journal of Civil Engineering, 2017, 7: 14-31. [8] Zhao Renda, Jia Yi, Zhan Yulin, et al. Seismic mitigation and isolation design for multi-span and long-unit continuous girder bridge inmeizoseismal area. Journal of Zhejiang University, 2018, 52(5):886-895. [9] Jia Yi, Zhao Renda, Liao Ping, et al. Parameter optimization and damping effect of hyperbolic surface friction pendulum bearing for continuous girder bridge under rare earthquake. China Railway Science, 2018, 39(3): 31-40. [10] Liao Ping, Zhao Renda, Jia Yi, et al. Effects of hyperbolic surface friction pendulum bearings’ parameters on seismic response of the bridge. Journal of Southeast University, 2016, 46(6):1251-1256. [11] Zhong Tieyi, Yang Fengli, Xia He. The design method of the seismically isolated bridge by lead rubber bearing based on energy method. China Railway Science, 2009, 30(2): 43-47.