吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (6): 1779-1783.doi: 10.13229/j.cnki.jdxbgxb201506007

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Calculation method of the dynamic characteristics of continuous beam bridge with variable cross-section based on staging concept

LIU Han-bing1, SHI Cheng-lin1,2, TAN Guo-jin1, WANG Hua1, HUANG Bin1   

  1. 1.College of Transportation, Jilin University,Changchun 130022,China;
    2.Scientific Research and Development Center,Jilin Provincial Transport Scientific Research Institute, Changchun 130012, China
  • Received:2014-07-08 Online:2015-11-01 Published:2015-11-01

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Abstract: A calculation method of the dynamic characteristics of continuous beam bridge with variable cross-section is proposed based staging concept. In this method, each cross of a girder bridge is segmented; the undetermined coefficients are used to express the vibration mode function of each segment; the transfer equations within the undetermined coefficients of each cross are established based on intersegmental continuity condition. The equations of the full-bridge undetermined coefficients are formed based on all the boundary conditions and transfer equations. The method is able to calculate the natural frequency and vibration mode of the bridge by solving the equations of undetermined coefficients. This method is applied to solve the dynamic characteristics of a continuous box girder bridge to demonstrate its validity and reliability.

Key words: continuous beam bridge, variable cross-section, dynamic characteristics, segmentation algorithm

CLC Number: 

  • U441
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