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Study on a conical bearing for acceleration-sensitive equipment

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Abstract

Seismic isolation effectively reduces seismic demands on building structures by isolating the superstructure from ground vibrations during earthquakes. However, isolation strategies give less attention to acceleration-sensitive systems or equipment. Meanwhile, as the isolation layer’s displacement grows, the stiffness and frequency of traditional rolling and sliding isolation bearings increases, potentially causing self-centering and resonance concerns. As a result, a new conical pendulum bearing has been selected for acceleration-sensitive equipment to increase self-centering capacity, and additional viscous dampers are incorporated to enhance system damping. Moreover, the theoretical formula for conical pendulum bearings is supplied to analyze the device’s dynamic parameters, and shake table experiments are used to determine the proposed device’s isolation efficiency under various conditions. According to the test results, the newly proposed devices have remarkable isolation performance in terms of minimizing both acceleration and displacement responses. Finally, a numerical model of the isolation system is provided for further research, and the accuracy is demonstrated by the aforementioned experiments.

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Authors and Affiliations

  1. Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, 29 Xuefu Road, Harbin, 150080, China

    Hui Pang, Wen Xu, Junwu Dai & Tao Jiang

  2. Key Laboratory of Earthquake Disaster Mitigation, Ministry of Emergency Management, Harbin, 150080, China

    Hui Pang, Wen Xu, Junwu Dai & Tao Jiang

  3. School of Civil Engineering and Transportation, Beihua University, Jilin, 132013, China

    Hui Pang

Authors
  1. Hui Pang
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  2. Wen Xu
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  3. Junwu Dai
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  4. Tao Jiang
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Corresponding author

Correspondence to Tao Jiang.

Additional information

Supported by: Scientific Research Fund of Institute of Engineering Mechanics, CEA under Grant No. 2019A03, Scientific Research Fund of Institute of Engineering Mechanics, CEA under Grant No. 2021D12, and National Key R&D Program of China under No. 2018YFC1504404

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Pang, H., Xu, W., Dai, J. et al. Study on a conical bearing for acceleration-sensitive equipment. Earthq. Eng. Eng. Vib. 23, 103–128 (2024). https://doi.org/10.1007/s11803-024-2230-3

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  • DOI: https://doi.org/10.1007/s11803-024-2230-3

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