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Analysis of Spiral Lattice Girder Shape in preparation for HSR Speed Increase

  • Eum, Ki-Young (High-Speed Railroad Infrastructure Research Team, KRRI) ;
  • Lee, Jee-Ha (High-Speed Railroad Infrastructure Research Team, KRRI) ;
  • Park, Young-Kon (High-Speed Railroad Infrastructure Research Team, KRRI) ;
  • Yun, Jangho (High-Speed Railroad Infrastructure Research Team, KRRI) ;
  • Jeong, Seongwoon (High-Speed Railroad Infrastructure Research Team, KRRI)
  • Published : 2013.12.31

Abstract

A spiral lattice girder-reinforced Bi-block sleeper which has enhanced durability against increasingly growing impact force and vibration by wheel load and improved structural performance while train runs at 350km/h high speed is hereby proposed. The section of a spiral lattice girder has stable and superior structural performance thanks to its confinement effect. To compare and analyze the structural performance of spiral lattice girder-reinforced bi-block sleeper, strain and stress distribution were evaluated after applying same load condition as existing triangular lattice girder-reinforced biblock sleeper, and to compare the structural performance of triangular lattice girder and spiral lattice girder, structural analysis of lattice girder was performed separately. As a result, a spiral lattice girder proved to have had superior structural characteristics to bi-block sleeper, and furthermore as a result of evaluating the fastener interface and constructibility with shape-improved lattice girder, no interference with existing railroad structure was found and in terms of cost efficiency, a spiral lattice girder appeared to be superior to existing lattice girder.

Keywords

References

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