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Analytical Study of Railroad Bridge for Maglev Propulsion Train with Dynamical Influence Variable

동적영향변수를 통한 자기부상열차용 철도교의 해석적 연구

  • 유이슬 (서울시립대학교 토목공학과) ;
  • 박원찬 (대한전기협회) ;
  • 임성순 (서울시립대학교 토목공학과)
  • Received : 2018.03.08
  • Accepted : 2018.04.06
  • Published : 2018.04.30

Abstract

Because maglev trains have a propulsion and absorption force without contact with the rails, they can drive safely at high-speed with little oscillation. Recently, test model of a maglev propulsion train was produced and operated, and has since been chosen as a national growth industry in South Korea; there have been many studies and considerable investment in these fields. This study examined the dynamic responses due to bridge-maglev train interaction and basic material to design bridges for maglev trains travelling at high-speed. Depending on the major factors affecting the dynamic effects, the scope of this study was restricted to the relationship between dynamic responses. A concrete box girder was chosen as a bridge model and injured train and rail types in domestic production were selected as the moving train load and guideway analysis model, respectively. From the analysis results, the natural frequency of a bridge for a maglev train, which has a deflection limit L/2000, was higher than those of bridges for general trains. The dynamic responses of the girder of the bridge for a maglev train showed a substantial increase in proportion to the velocities of the moving train like other general bridge cases. Maximum dynamic response of the girder is shown at a moving velocity of 240km/h and increased with increasing moving velocity of train. These results can be used to design a bridge for maglev propulsion trains and provide the basic data to confirm the validity and verification of the design code.

Keywords

Guideway;Maglev propulsion train;Moving Train Load;Railway Bridge;Vehicle-Bridge Interaction

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