Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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Evaluation of the Structural Behavior Characteristics and Long Term Durability for Transition Track Systems in Railway Bridge Deck Ends

철도교량 단부 전환부 궤도시스템의 구조적 거동특성 및 장기 내구성능 분석

  • Lee, Kwangdo (Graduate School of Railway, Seoul National University of Science & Technology) ;
  • Jeong, Incheol (Graduate School of Railway, Seoul National University of Science & Technology) ;
  • Choi, Jungyoul (Graduate School of Railway, Seoul National University of Science & Technology) ;
  • Park, Yonggul (Graduate School of Railway, Seoul National University of Science & Technology)
  • Received : 2014.04.14
  • Accepted : 2014.07.23
  • Published : 2014.08.31
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Abstract

Transition tracks are an alternative for enhancing the long-term serviceability and durability of concrete track components in railway bridges. The goal of this paper is to investigate the structural behavior for transition track systems of railway bridge deck ends. In this study, the structural behavior of transition tracks such as the variations in static, dynamic, and fatigue behaviors and dynamic properties (natural frequency and damping ratio) are assessed and compared through performing loading tests and finite element analyses using actual vehicle impact loadings. As a result, it is found that the structural behavior of the transition track system is expected to satisfy the actual vehicle impact loading, and the variation in the neutral axis and dynamic characteristics are not affected by the fatigue loading. Therefore, it is inferred that the structural capacity and long-term durability of the transition track system is proven.

본 논문의 목적은 철도교량 단부 전환부 궤도의 구조적 거동특성을 평가하는 것이다. 국내 고속철도 교량상 궤도표준단면을 이용하여 전환부 궤도구조를 설계 및 제작하여 피로시험 전, 후에 대한 전환부 궤도시스템의 중립축 및 동특성(고유진동수 및 감쇠비)의 변화를 비롯하여 피로균열 발생경향을 수치해석 결과와 비교, 검토하였다. 연구결과, 국내 고속철도 궤도설계기준을 준용하여 설계한 전환부 궤도시스템에 대한 동특성을 실험적으로 산정하였으며 국내 철도하중 및 충격효과를 고려한 피로하중에 대한 구조적 건전성을 실험 및 해석적으로 입증하였다.

Keywords

References

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