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Study on the Stiffness Correction Method of Novel Antivibration Bearing for Urban Rail Transit Viaduct

机译：城市轨道交通高架桥新型抗振轴承刚度校正方法研究

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摘要

A novel antivibration bearing is developed to reduce the train-induced vibrations for urban rail transit viaduct. It adopts four high-damping thick rubber blocks stacking slantingly to reduce the vibration and provide large lateral stiffness. But the existing stiffness calculationmethod of laminated rubber bearing aimed at horizontal seismic isolation is unsuitable for thick rubber bearing designed for vertical vibration reduction. First, the stiffness correction method has been proposed based on the characteristics of the novel bearing. Second, to validate the design method, mechanical property tests are performed on a specimen of the novel bearing with design frequency at 8Hz and with 3500 kN bearing capacity. Third, damping effects of the novel bearing are investigated through impulse vibration tests on scaled models. Results show that the mechanical property of the novel bearing can satisfy the engineering demand, and the proposed method for calculating the stiffness agrees well with the test results. The overall insertion loss of the novel bearing is 13.49 dB which is 5.32 dB larger than that of steel bearing, showing that the novel bearing is very promising to be used in the field to mitigate train-induced vibrations.
机译：开发了一种新型的防振轴承，以减少火车引起的城市轨道交通高架桥的振动。它采用倾斜堆叠的四个高阻尼厚橡胶块，以减少振动并提供较大的侧向刚度。但是，现有的用于水平隔震的叠层橡胶轴承刚度计算方法不适用于为减振设计的厚橡胶轴承。首先，根据新型轴承的特性提出了刚度校正方法。其次，为验证设计方法，对新型轴承的样本进行了机械性能测试，该样本的设计频率为8Hz，承载能力为3500 kN。第三，通过在比例模型上的脉冲振动试验研究了新型轴承的阻尼效果。结果表明，该新型轴承的力学性能能够满足工程需求，所提出的刚度计算方法与试验结果吻合良好。新型轴承的总插入损耗为13.49 dB，比钢轴承的总插入损耗大5.32 dB，这表明新型轴承非常有希望在现场用于减轻列车引起的振动。

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  • 来源
    《Shock and vibration》 |2017年第6期|22.1-22.15|共15页
  • 作者

    Xie Weiping; Du Youfu; Sun Liangming; Marioni Agostino; Liang Xu;

  • 作者单位

    Wuhan Univ Technol, Hubei Key Lab Roadway Bridge & Struct Engn, Wuhan 430070, Hubei, Peoples R China;

    Wuhan Univ Technol, Sch Civil Engn & Architecture, Wuhan 430070, Hubei, Peoples R China;

    Wuhan Univ Technol, Hubei Key Lab Roadway Bridge & Struct Engn, Wuhan 430070, Hubei, Peoples R China;

    Wuhan Hirun Engn Equipment Co Ltd, Wuhan 430084, Hubei, Peoples R China;

    Wuhan Univ Technol, Sch Civil Engn & Architecture, Wuhan 430070, Hubei, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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