Smart Structures and Systems

  • 제24권3호
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  • Pages.345-360
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  • 2019
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

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Effects of shear keys on seismic performance of an isolation system

  • Wei, Biao (School of Civil Engineering, Central South University) ;
  • Li, Chaobin (School of Civil Engineering, Central South University) ;
  • Jia, Xiaolong (School of Civil Engineering, Central South University) ;
  • He, Xuhui (School of Civil Engineering, Central South University) ;
  • Yang, Menggang (School of Civil Engineering, Central South University)
  • 투고 : 2019.01.12
  • 심사 : 2019.04.26
  • 발행 : 2019.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

The shear keys are set in a seismic isolation system to resist the long-term service loadings, and are cut off to isolate the earthquakes. This paper investigated the influence of shear keys on the seismic performance of a vertical spring-viscous damper-concave Coulomb friction isolation system by an incremental dynamic analysis (IDA) and a performance-based assessment. Results show that the cutting off process of shear keys should be simulated in a numerical analysis to accurately predict the seismic responses of isolation system. Ignoring the cutting off process of shear keys usually leads to untrue seismic responses in a numerical analysis, and many of them are unsafe for the design of isolated structure. And those errors will be increased by increasing the cutting off force of shear keys and decreasing the spring constant of shear keys, especially under a feeble earthquake. The viscous damping action postpones the cutting off time of shear keys during earthquakes, and reduces the seismic isolation efficiency. However, this point can be improved by increasing the spring constant of shear keys.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundations of China, Natural Science Foundations of Hunan Province

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피인용 문헌

  1. A Numerical Investigation on Scaling Rolling Friction Effects in Shaking Table Model Tests vol.2019, 2019, https://doi.org/10.1155/2019/7473031
  2. Equivalence of Friction and Viscous Damping in a Spring-Friction System with Concave Friction Distribution vol.49, pp.1, 2020, https://doi.org/10.1520/jte20190885
  3. Influence of ground motion duration and isolation bearings on the seismic response of base-isolated bridges vol.222, 2020, https://doi.org/10.1016/j.engstruct.2020.111129
  4. Influence of pier height on the effectiveness of seismic isolation of friction pendulum bearing for single-track railway bridges vol.28, pp.2, 2021, https://doi.org/10.12989/sss.2021.28.2.213