Hysteretic model of disc spring isolation bearings and its experimental verification
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(1.School of Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang 212000, Jiangsu,China; 2.School of Civil Engineering, Southeast University, Nanjing 210096,China; 3.Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044, China)

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TU352.12

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    Abstract:

    To study the hysteretic model of disc spring isolation (DSI) bearings, the mechanical property and deformation performance of DSI bearings were investigated,and the Origin-oriented (OO) hysteretic model of DSI bearings was proposed. The mechanical performance of a typical DSI bearing under reversed loadings was studied, and the OO hysteretic curves of the DSI bearing were investigated, whose results were used to verify the OO hysteretic model of the DSI bearings. The results indicate that the OO hysteretic model of the DSI bearings had the characteristic of asymmetry, and the friction forces had significant influence on the OO hysteretic force characteristic. The tested load-displacement hysteretic curves of the DSI bearing had the characteristic of asymmetry under reversed loadings.The loading frequency had little influence on the mechanical property of the DSI bearings, while the loading amplitude and vertical load had great influence on that of the DSI bearings. As the dynamic load amplitude increased, fullness of the load-displacement hysteresis curves of Model E gradually decreased, and the asymmetry of the curves gradually increased.As the preloading displacement increased, the load-displacement hysteresis curves of Model E tended to be full, indicating that its energy dissipation capacity gradually increased.Moreover, the OO hysteretic model can simulate the mechanical performance of the DSI bearings effectively, and the errors between the simulated results and the experimental results were within 8%.

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History
  • Received:June 06,2018
  • Revised:
  • Adopted:
  • Online: May 28,2019
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