Smart Structures and Systems

  • 제27권3호
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  • Pages.447-455
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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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Seismic isolation of railway bridges using a self-centering pier

  • Xia, Xiushen (School of Civil Engineering, Lanzhou Jiaotong University) ;
  • Zhang, Xiyin (School of Civil Engineering, Lanzhou Jiaotong University) ;
  • Shi, Jun (School of Civil Engineering, Lanzhou Jiaotong University) ;
  • Tang, Jingyao (School of Civil Engineering, Lanzhou Jiaotong University)
  • 투고 : 2019.10.15
  • 심사 : 2020.12.09
  • 발행 : 2021.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

Earthquakes cause severe damages to bridge structures, and rocking isolation of piers has become a superior option for the seismic protection of bridges during earthquakes. A seismic isolation method with free rocking mode is proposed for railway bridge piers with medium height. Experimental and numerical analysis are conducted to evaluate the seismic performance of the rocking-isolated bridge pier. Shaking table test is carried out with a scaled model by using three strong input earthquake records. The measured data includes displacement, acceleration and time history response of the pier-top and the bending moment of the pier-bottom. Test results show that the expected uplift and rocking of the isolated pier occur under strong earthquakes and the rocking-isolated pier has self-centering capacity. Slight damage appears at the collision surface between pier and base due to pier uplift, while there is no damage in the pier body. The bending moment of pier-bottom is less affected by the spectrum of input ground motions. The two-spring model is provided to simulate the isolated pier with free rocking mode under earthquakes. A seismic response analysis model for the rocking-ioslated pier is established with the assistance of OpenSees platform. The simulated results agree well with the measured results by shaking table test. Therefore, the seismic isolation method with a self-centering pier is worthy of promotion for railway bridges in high seismic risk regions.

키워드

과제정보

This research is supported by the National Natural Science Foundation of China (Grant No. 51668035, 51808273, 52068041 and 52068045), Project funded by China Postdoctoral Science Foundation (for Xiyin Zhang), Science and Technology Program of Gansu Province for Distinguished Young Scholars (Grant No. 20JR5RA430), Youth Talent Support Project of China Association for Science and Technology (for Xiyin Zhang), Tianyou Youth Talent Lift Program of Lanzhou Jiaotong University (Xiyin Zhang) and lzjtu (201801) EP support. On behalf of all authors, the corresponding author states that there is no conflict of interest.

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피인용 문헌

  1. Dimensionality reduction of the 3D inverted pendulum cylindrical oscillator and applications on sustainable seismic design of bridges vol.51, pp.2, 2021, https://doi.org/10.1002/eqe.3575