吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (3): 798-803.doi: 10.13229/j.cnki.jdxbgxb201603018

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Calculation of natural frequency of simply supported beam bridge reinforced with eccentric prestressed tendons

TAN Guo-jin1, LIU Zi-yu1, WEI Hai-bin1, WANG Long-lin2   

  1. 1.College of Transportation,Jilin University,Changchun 130022,China;
    2.Guangxi Transportation Scientific Research Institute,Guangxi Provincial Bridge Monitoring and Reinforcement Engineering Technology Research Center,Nanning 530007,China
  • Received:2015-09-28 Online:2016-06-20 Published:2016-06-20

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Abstract: In order to reveal the mechanisms of natural vibration frequency of simply supported beam reinforced with eccentric prestressed tendons, a calculation method of the natural frequency is proposed, and the influence of effective prestress on the natural frequency is analyzed. First, the vibration system of the simply supported and prestressed beam is decomposed into two subsystems, the prestressed tendons and the simply supported beam. The dynamic equilibrium equations of the two subsystems are established using the principle of structural vibration. Then, based on the coupling analysis and processing of the vibration equations of the subsystems, a calculation method of the natural frequency of beam is derived. Using this method, the calculated natural vibration frequencies of the simply supported and prestressed beam are in good agreement with that predicted by finite element method.

Key words: bridge engineering, prestressed force, simply supported beam, natural vibration frequency

CLC Number: 

  • U441.3
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