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ZHAO Guo-hui, GAO Jian-hua, LIU Jian-xin, LI Yu. Damping coefficient optimization of linear fluid viscous damper for suspension bridge[J]. Journal of Traffic and Transportation Engineering, 2013, 13(3): 33-39. doi: 10.19818/j.cnki.1671-1637.2013.03.005
Citation: ZHAO Guo-hui, GAO Jian-hua, LIU Jian-xin, LI Yu. Damping coefficient optimization of linear fluid viscous damper for suspension bridge[J]. Journal of Traffic and Transportation Engineering, 2013, 13(3): 33-39. doi: 10.19818/j.cnki.1671-1637.2013.03.005
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Damping coefficient optimization of linear fluid viscous damper for suspension bridge

doi: 10.19818/j.cnki.1671-1637.2013.03.005
  • 1.

    School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China

  • 2.

    Department of Road and Bridge Engineering, Henan Vocational and Technical College of Communications, Zhengzhou 450005, Henan, China

More Information
  • Author Bio:

    ZHAO Guo-hui(1978-), male, lecturer, PhD, +86-29-82334835, zgh@gl.chd.edu.cn

  • Received Date: 2012-12-28
  • Publish Date: 2013-06-25
    Abstract
  • The longitudinal vibration of suspension bridge stiffening girder was simplified as some independent single degree of freedom vibration systems. Stochastic vibration theory was used, and earthquake excitation was simplified as stationary white-noise excitation, the analytical expression of absolute acceleration mean square for stiffening girder longitudinal vibration was deduced. According to the principle of derivative extremum, the minimum absolute acceleration mean square and the corresponding system optimum damping ratio were derived, and the analytical expression of optimum damping coefficient for suspension bridge linear fluid viscous damper was got. A suspension bridge was selected as example, parametric sensitivity study was carried out based on dynamic time-historical method, and the reliability of the analytical expression was verified. Analysis result shows that the theoretical optimum damping ratio of suspension bridge linear fluid viscous damper is 0.5, and the efficiency of damper reaches its maximum with the corresponding optimum damping coefficient.When damping ratio is 0.3, damper efficiency is about 90% of optimum damping ratio.When damping ratio is 0.4-0.6, damper efficiency is 99% of optimum damping ratio, so the optimum damping coefficient of linear fluid viscous damper can be adjusted properly in the range according to earthquake intensity, damper stroke and cost.

     

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    • References(13)
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