Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Train-Structure Dynamic Interaction Analysis of The Bridge Transition Considering Track Irregularity

궤도틀림을 고려한 교대접속부의 열차상호동적거동해석

  • Choi, Chan-Yong (High-Speed Railway Research Division, Korea Railroad Research Institute) ;
  • Kim, Hun-Ki (High-Speed Railway Research Division, Korea Railroad Research Institute) ;
  • Chung, Keun-Young (KY Technology) ;
  • Yang, Sang-Beom (Dept of Civil, Architecture and Environmental Systems Engineering, Sungyunkwan Univ.)
  • 최찬용 (한국철도기술연구원, 고속철도연구본부) ;
  • 김현기 (한국철도기술연구원, 고속철도연구본부) ;
  • 정근영 ;
  • 양상범 (성균관대학교 건설환경시스템공학과)
  • Received : 2015.05.29
  • Accepted : 2015.09.16
  • Published : 2015.09.30
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Abstract

In this study, track dynamic interaction characteristics caused by the vehicle running through transitional section such as bridge abutments were studied using the finite element analysis program. The geometric condition of track was generated by trigonometric function and allowable maximum track irregularity is determined by KORAIL track maintenance criteria. The sub-infrastructure under rail fastener system was modelled by 3D solid elements. To reduce computational cost only half track line is numerically considered and the roller boundary condition was applied to each side of model. In this study, the vehicle-track dynamic interaction analysis was carried out for standard Korean transition section of concrete track and the dynamic behaviors were investigated. The dynamic characteristics considered are wheel load variation, vertical acceleration at body, and maximum Mises stress at each part of transitional section.

이 연구에서는 열차가 교량 접속부를 통과하면서 발생되는 동적상호작용 문제를 유한요소해석프로그램을 이용하여 검토하였다. 해석대상구간에서의 궤도틀림조건은 부등침하량을 삼각함수를 이용하여 이상화하고, 철도공사 선로 보수기준을 만족하는 최대 궤도틀림 한계치를 해석조건으로 설정하였다. 해석대상이 되는 접속부 구조물의 체결장치 아래 부분은 모두 3차원 입체요소로 모형화하였으며, 해석비용을 줄이기 위하여 1/2 궤도부분만을 모형화하였다. 경계조건은 평면변형률상태에 준하는 것으로 차량-궤도 동적상호작용해석을 수행하였다. 국내 콘크리트궤도용 표준 접속부에서의 궤도틀림에 따른 열차 주행시 동적상호작용해석을 수행하여 윤중감소율과 차체수직진동가속도를 살펴보았으며, 접속부의 시멘트 안정처리골재, 일반골재, 일반토사구간에서의 발생된 최대 Mises응력으로 동적거동을 평가하였다.

Keywords

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