Analysis of dynamic behavior of Railroad Steel Bridges According to Bridge Bearing Types

교량받침 형식에 따른 판형교 동적 분석

  • 최은수 (홍익대학교 공과대학 토목공학과) ;
  • 최승환 (홍익대학교 공과대학 토목공학과)
  • Received : 2011.12.08
  • Accepted : 2012.01.17
  • Published : 2012.02.26


Dynamic behaviors of line type bearings, spherical bearings and disk bearings which are being used for railway steel bridges are investigated, and that of the bridges is also analyzed. For the purpose, the vertical displacements of the three bearings including fixed and expansion type are measured and analyzed. Also, the deformation of the PTFE plate placed inside of spherical and disk bearings of expansion type is measured and its effect on the dynamic behavior of the bridges is discussed. The up-lift phenomenon at the bearings installed for the steel bridges is estimated. The vertical displacements at mid-span of the bridges are compared according to the bearing types. Finally, the 1st mode natural frequencies are estimated and the relationship to the vertical displacement is discussed.


Supported by : 홍익대학교


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