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Study on a conical bearing for acceleration-sensitive equipment

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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.

seismic isolationacceleration-sensitive equipmentthe conical pendulum bearingshake table testsisolation performance,numerical model

Pang Hui、Xu Wen、Dai Junwu、Jiang Tao

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Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China

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

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

Scientific Research Fund of Institute of Engineering Mechanics,CEAScientific Research Fund of Institute of Engineering Mechanics,CEANational Key R&D Program of China

2019A032021D122018YFC1504404

2024

https://10.1007/s11803-024-2230-3

地震工程与工程振动(英文版)
中国地震局工程力学研究所

地震工程与工程振动(英文版)

EI
影响因子：0.476
ISSN：1671-3664
年,卷(期)：2024.23(1)
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