A Dynamic Behavior Evaluation of the Curved Rail according to Lateral Spring Stiffness of Track System

궤도시스템의 횡탄성에 따른 곡선부 레일의 동적거동평가

  • 김박진 (서울산업대학교 철도전문대학원 철도건설공학과, 서울메트로 철도토목팀) ;
  • 최정열 ((주)대한콘설탄트 철도부 궤도팀) ;
  • 천대성 (서울산업대학교 철도전문대학원 철도건설공학과) ;
  • 엄맥 (서울산업대학교 철도전문대학원 철도건설공학과) ;
  • 강윤석 (한국철도기술연구원 철도구조물연구팀) ;
  • 박용걸 (서울산업대학교 철도전문대학원 철도건설공학과)
  • Published : 2007.11.08

Abstract

Domestic or international existing researches regarding rail damage factors are focused on laying, vehicle conditions, driving speed and driving habits and overlook characteristics of track structure (elasticity, maintenance etc). Also in ballast track, as there is no special lateral spring stiffness of track also called as ballast lateral resistance in concrete track, generally, existing study shows concrete track has 2 time shorter life cycle for rail replacement than ballast track due to abrasion. As a result of domestic concrete track design and operation performance review, concrete track elasticity is lower than track elasticity of ballast track resulting higher damage on rail and tracks. Generally, concrete track has advantage in track elasticity adjustment than ballast track and in case of Europe, in concrete track design, it is recommended to have same or higher performance range of vertical elastic stiffness of ballast track but domestically or internationally review on lateral spring stiffness of track is very minimal. Therefore, through analysis of service line track on site measurement and analysis on performance of maintenance, in this research, dynamic characteristic behaviors of commonly used ballast and concrete track are studied to infer elasticity of service line track and experimentally prove effects of track lateral spring stiffness that influence curved rail damage as well as correlation between track elasticity by track system and rail damage to propose importance of appropriate elastic stiffness level for concrete and ballast track.