Static and Free Vibration Analyses of Hybrid Girders by the Equivalent Beam Theory

등가보 이론을 이용한 복합 거더의 정적 및 자유진동 해석

  • 최인식 (한국철도기술연구원, 궤도토목연구본부) ;
  • 여인호 (한국철도기술연구원, 궤도토목연구본부)
  • Published : 2007.10.31

Abstract

3D finite element analyses of a corrugated steel web girder and a steel truss web girder are conducted to investigate the static and dynamic behaviour of the hybrid girders. And the analyses results are compared with those by the equivalent beam theory. The equivalent theory is a theory that all section properties of a truss structure are replaced by section properties of a beam including a shear coefficient. When applying the equivalent beam theory, the shear coefficient of the corrugated steel web girder is estimated as the area ratio of flange section to web section and that of the steel truss web girder is calculated by the equation proposed by Abdel. Static deflections and natural frequencies by 3D finite element analyses and those by the equivalent beam theory are in good agreement.

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