Investigation of Load Transfer Characteristics at Slab Joints In The Floating Slab Track by Equivalent Shear Spring Model

등가 전단 스프링 모델을 이용한 플로팅 슬래브궤도 연결부에서의 하중전달 특성 분석

  • 장승엽 (한국철도기술연구원, 신교통연구본부 초고속열차연구단TFT) ;
  • 안미경 (한국철도기술연구원, 신교통연구본부 초고속열차연구단TFT) ;
  • 최원일 (한국철도시설공단, KR연구원 기술연구소) ;
  • 박만호 (한국철도시설공단, KR연구원 기술연구소)
  • Published : 2011.10.20

Abstract

Recently, the floating slab track that can effectively mitigate the vibration and structure-borne noise is being discussed to be adopted. The floating slab track which is a track system isolated from the sub-structure by vibration isolators. Unsimilarly to conventional track and the slab deflection is large. Therefore, the running safety and ride comfort should be investigated. Especially at slab joint since the load cannot be transferred, the possibility that the dynamic behavior of track and train became unstable is high. Thus, in general dowel bar are often installed at slab joints. To determine the appropriate dowel ratio the load transfer characteristics should be investigated. In this study, dowel bar joint is modeled by equivalent shear spring and this model is verified by comparison with experimental results. Using the proven model, the load transfer efficiency and deflection at slab joint according to dowel ratio, and stiffness and spacing of vibration isolator were examined.

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Acknowledgement

Supported by : 국토해양부