Smart Structures and Systems

  • 제28권2호
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  • Pages.213-228
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  • 2021
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Influence of pier height on the effectiveness of seismic isolation of friction pendulum bearing for single-track railway bridges

  • He, Weikun (Key Laboratory for Damage Diagnosis of Engineering Structures of Hunan Province, Hunan University) ;
  • Jiang, Lizhong (School of Civil Engineering, Central South University) ;
  • Wei, Biao (School of Civil Engineering, Central South University) ;
  • Wang, Zhenwei (Zhejiang Scientific Research Institute of Transport)
  • 투고 : 2020.05.25
  • 심사 : 2021.05.26
  • 발행 : 2021.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

Friction pendulum bearing (FPB) in bridges with different pier heights has various degrees of effectiveness of seismic isolation. To determine the applicability of FPB under different bridge pier height conditions, this paper focuses on the simply supported girder railway bridges that have three types of piers: solid piers with uniform cross-section, solid piers with non-uniform cross-section, and hollow piers with non-uniform cross-section. All of these bridges are first installed with FPB (isolation bearing) and later with non-isolation bearing, modeled by using OpenSEES finite element software. A shake table test is used to verify the related models. Based on nonlinear dynamic time history analysis, the seismic responses of isolated and non-isolated bridges are compared, and their corresponding seismic isolation ratios are calculated. Further, this paper introduces a fuzzy comprehensive evaluation method to determine the seismic isolation effect of FPB on bridges with different pier heights, by weighing and balancing the isolation ratios of different seismic responses of bridges. The results show that the transverse seismic isolation ratios of FPB are generally larger than the longitudinal seismic isolation ratios. In addition, FPB has poorer seismic isolation effect on tall piers compared with short piers.

키워드

과제정보

This research is jointly supported by the National Natural Science Foundations of China under grant No. 51778635 and 51778630, the Science and Technology Project of Sichuan Province under grant No. 2019YFG0048, the Natural Science Foundations of Hunan Province under grant No. 2019JJ40386, and the Research Program on Key Technology for the Seismic Design of Railway Bridge in Nine Degree Seismic Intensity Zone under grant No. KYY2018059. The above support is greatly appreciated.

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