레일응력을 고려한 레일패드강성 결정

Evaluation of Rail pad Stiffness Considering Stress of Rail

  • 박대근 (한국철도시설공단, 고려대학교 건축사회환경공학과) ;
  • 김재학 (한국철도기술공사) ;
  • 손기준 (한국철도시설공단) ;
  • 김한종 (한국철도기술공사)
  • 발행 : 2007.11.08

초록

The track and rail surface geometry is of prime importance on the requirement for track dynamic stiffness, particularly for the speed of 350 km/h, for which both the requirement for fatigue and tensile strength limits require a lower stiffness than 100 kN/mm, which is near the value for ballasted track. However, the track quality has been considered as being the same for 350 km/h as that for 300 km/h, and based on ballasted track, and the track geometry may be kept in better condition with a slab track(probably more similar to the medium quality track geometry of ballasted track). In conclusion, under the condition that the track geometry quality provided by the concrete slab system is fairly good, and that the required maintenance is applied to the rail surface, there would be no safety risk if the fastening system point stiffness reaches 160 kN/mm for 300 km/h operation, and 110 N/mm at 350 km/h.

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