DOI QR코드

DOI QR Code

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

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.

References

  1. Choi, Eunsoo and Seung-Hwan Choi. (2012). Analysis of Dynamic Behavior of Railroad Steel Bridges according to Bridge Bearing Types. Journal of the Korean Society for Railway. 15(1): 62-70.  https://doi.org/10.7782/JKSR.2012.15.1.062
  2. Federal Highway Administration. (2020). Case Study: Responses to Bridge Impacts - An overview of State Practices. FHWA-HIF-20-087. Washington, D.C.: FHWA. 
  3. Hankyung News. (2022). https://www.hankyung.com/society/article/202208165995Y. Seoul: Hankyung. 
  4. Kim, Hyun-Ho, Ji-Taek Oh, Jae-Pil Song, and Ki-Bong Kim. (2005). Dynamic Behavior of Plate Girder Railway Bridges Using the Finite Element Code. Journal of the Korean Society for Railway. 8(3): 228-234. 
  5. Korea Expressway Corporation. (2018). 2017 Expressway Design Practical Data Book. Gimcheon: EX. 
  6. Lee, Do Hyung, Jae Yeob Shim, and Jong-Su Jeon. (2016). Damage Potential of a Domestic Metropolitan Railway Bridge subjected to 2016 Gyeongju Earthquake. Journal of Earthquake Engineering. 20(7): 461-472. 
  7. Min, Kyung-Ju, Sung-Uk Lee, Hyung-Soo Choi, and Yong-Keun Woo. (2011). Capacity Evaluation of PC-Slab Composite Actions for the Railway Steel Plate Girder according to an Experimental Construction. Proceedings of the 2011 Spring Conference of the Korean Society for Railway. 697-706. 
  8. Ministry of Land, Infrastructure and Transport. (2016a). Road Bridge Standard Specification. Sejong: MOLIT. 
  9. Ministry of Land, Infrastructure and Transport. (2016b). Standard Specification for Steel Structure Construction. Sejong: MOLIT. 
  10. Ministry of Land, Infrastructure and Transport. (2017). Railroad Construction Work Specialized Specifications (roadbed). Sejong: MOLIT. 
  11. Ministry of Land, Infrastructure and Transport. (2022a). Road Bridge and Tunnel Status Report. Sejong: MOLIT. 
  12. Ministry of Land, Infrastructure and Transport. (2022b). Budget Status of Land, Infrastructure and Transport Report (https://www.molit.go.kr/USR/budget/m_90/lst.jsp). Sejong: MOLIT. 
  13. Park, Joonam, Eunsoo Choi, Sung-Il Kim, and Sung-Cheol Cho. (2009). Seismic Risk Analysis of Track-on-Steel Plate Girder Railway Bridges. Journal of Korean Society of Steel Construction. 21(1): 45-53. 
  14. Park, Soon-Eung, Heong-Ho Kim, Chang-Yeol An, Chang-Hoon Lee, Seung-Bok Shin, Chung-In Seo, and Hyuk-Sang Jung. (2017). A Study on Seismic Performance Evaluation and Reinforcement Method of Railway Bridge. Proceedings of the 2017 Autumn Conference & Annual Meeting of the Korean Society for Railway. KSR2017A060. 
  15. Rail Safety Information System. (2023). https://railsafety.or.kr/content/StatsGeneraltable_ContentView.do. Gimcheon: KOTSA. 
  16. Seo, Dong-Woo, Jaehwan Kim, Jin-Hyuk Lee, Han-Min Cho, Sangki Park, and Min-Soo Kim. (2022). A Study on The Application of Non-destructive (Ultrasonic) Inspection Technique to Detect Defects of Anchor Bolts for Road Facilities. Journal of Korean Society of Disaster and Security. 15(4): 11-20.  https://doi.org/10.21729/KSDS.2022.15.4.11