Journal of Korean Society of Disaster and Security (한국방재안전학회논문집)

Korean Society of Disaster & Security (한국방재안전학회)
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A Numerical Study on Structural Safety Evaluation of Railway Bridges Deformed due to External Impact Loads

외부 충돌하중으로 변형된 철도 교량의 구조적 안전성 평가에 관한 수치 해석적 연구

  • Dong-Woo Seo (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Kyu-San Jung (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Sangki Park (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Jung-Hyun Kim (Kobec Ltd.)
  • 서동우 (한국건설기술연구원 구조연구본부) ;
  • 정규산 (한국건설기술연구원 구조연구본부) ;
  • 박상기 (한국건설기술연구원 구조연구본부) ;
  • 김정현 (코벡주식회사)
  • Received : 2023.05.27
  • Accepted : 2023.06.15
  • Published : 2023.06.30
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Abstract

In general, bridges are facilities installed for the purpose of easily passing through sections such as valleys and rivers. Railway bridges that run through downtown areas are damaged due to external factors such as earthquakes and collisions with passing vehicles, resulting in serious human casualties. This can cause serious human and properties damage, such as functional paralysis in downtown areas. Depending on the degree of damage, repair work such as partial repair or full replacement is in progress for the bridge where the collision occurred. When damage or deformation occurs due to collision, the repair method is determined according to the degree of deformation and the degree to which the load capacity of the bridge is affected by the deformation. In this study, a numerical analysis review was performed on the repair work for the local deformation caused by the collision of a vehicle on an old railway bridge installed and in operation in an urban area. To this end, a structural safety review of the bridge for local deformations caused by vehicle collisions was conducted. In this paper, a repair method for the accident bridge was presented based on the analysis results.

일반적으로 교량은 계곡, 하천 등의 구간을 쉽게 통과하기 위한 목적으로 설치되는 시설물이다. 도심지를 통과하여 운행되는 철도교량 등은 지진, 통행차량의 충돌 등의 외부적인 요인으로 인해 손상이 발생하게 되며, 이로 인한 심각한 인명피해와 주변 시설물의 피해 그리고 운행중단으로 인한 도심지의 기능 마비 등 심각한 인적 물적 피해가 발생할 수 있다. 충돌이 발생한 교량에 대해서는 손상 정도에 따라 부분 보수 혹은 전면 교체 등의 보수작업이 진행되고 있다. 충돌로 인한 손상 혹은 변형이 발생하는 경우, 변형의 정도, 변형으로 인한 교량의 내하력에 영향을 미치는 정도 등에 따라 보수 방법을 결정한다. 본 연구에서는 도심지 내에서 설치되어 운행 중인 노후 철도 교량에 대해 차량의 충돌로 인해 발생한 국부 변형에 대한 보수작업에 대한 수치 해석적 검토를 수행하였다. 이를 위해 차량 충돌로 인하여 발생한 국부 변형에 대한 교량의 구조적 안전성 검토를 수행하였다. 본 논문에서는 분석 결과를 바탕으로 사고 교량의 보수 방법을 제시하였다.

Keywords

Acknowledgement

This work was supported by Korea Institute of Civil Engineering and Building Technology (Project Number: 20230308-001), granted financial resource from the Ministry of Science and ICT, Republic of Korea.

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