문화기술의 융합 (The Journal of the Convergence on Culture Technology)

  • 제8권5호
  • /
  • Pages.515-524
  • /
  • 2022
  • /
  • 2384-0358(pISSN)
  • /
  • 2384-0366(eISSN)
국제문화기술진흥원 (The International Promotion Agency of Culture Technology)
권호 표지
DOI QR코드

DOI QR Code

도시철도 침목플로팅궤도 분기기 망간크로싱의 손상해석

Damage Analysis of Manganese Crossings for Turnout System of Sleeper Floating Tracks on Urban Transit

  • 최정열 (동양대학교 건설공학과) ;
  • 윤영선 (서울교통공사 궤도처) ;
  • 안대희 (동양대학교 건설공학과) ;
  • 한재민 (동양대학교 건설공학과) ;
  • 정지승 (동양대학교 건설공학과)
  • 투고 : 2022.07.15
  • 심사 : 2022.08.31
  • 발행 : 2022.09.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

도시철도 침목플로팅궤도(STEDEF)의 분기기는 콘크리트 도상에 매입된 목침목과 침목 하부의 침목방진패드로 구성된 방진궤도로서 침목방진패드의 열화 및 이에 따른 스프링강성의 변화가 침목지지조건의 변화를 초래할 수 있다. 현재 약 21년의 공용기간 동안 발생된 망간크로싱의 손상수량은 전체 부설수량 대비 약 17%로 조사되었으며, 사용 기간 15년 이후(누적통과톤수 약 5.5억톤)부터 손상 물량이 증가하는 것으로 분석되었다. 본 연구에서는 실물 망간크로싱과 차륜의 형상을 모사한 3차원 수치모델을 이용한 매개변수 해석(차륜의 위치, 침목지지조건 및 동적 윤중의 크기)을 수행하여 실제 현장에서 발생된 망간크로싱의 손상유형 및 발생원인을 분석하였다. 연구결과, 노즈부 주변 침목에 뜬침목이 발생된 경우, 설계 궤도충격계수가 적용된 동적윤중 작용 시 노즈부 단면의 발생응력이 항복강도를 초과하였으며, 이는 실제 현장에서 발생된 손상위치와 비교적 잘 일치하는 것으로 분석되었다. 따라서 망간크로싱의 손상을 최소화하기 위해서는 노즈부 주변의 침목지지조건을 일정한 수준으로 유지하고, 손상된 망간크로싱 교체 시에는 침목 하부 경계조건의 균일성 확보를 위해 침목방진패드를 함께 교체하는 것이 바람직할 것으로 분석되었다.

The turnout system of the sleeper floating tracks (STEDEF) on urban transit is a Anti-vibration track composed of a wooden sleeper embedded in a concrete bed and a sleeper resilience pad under the sleeper. Therefore, deterioration and changes in spring stiffness of the sleeper resilience pad could be cause changes in sleeper support conditions. The damage amount of manganese crossings that occurred during the current service period of about 21 years was investigated to be about 17% of the total amount of crossings, and it was analyzed that the damage amount increased after 15 years of use (accumulated passing tonnage of about 550 million tons). In this study, parameter analysis (wheel position, sleeper support condition, and dynamic wheel load) was performed using a three-dimensional numerical model that simulated real manganese crossing and wheel profile, to analyze the damage type and cause of manganese crossing that occurred in the actual field. As a result of this study, when the voided sleeper occurred in the sleeper around the nose, the stress generated in the crossing nose exceeded the yield strength according to the dynamic wheel load considering the design track impact factor. In addition, the analysis results were evaluated to be in good agreement with the location of damage that occurred in the actual field. Therefore, in order to minimize the damage of the manganese crossing, it is necessary to keep the sleeper support condition around the nose part constant. In addition, by considering the uniformity of the boundary conditions under the sleepers, it was analyzed that it would be advantageous to to replace the sleeper resilience pad together when replacing the damaged manganese crossing.

키워드

참고문헌

  1. Y.S. Yoon, "Damage Analysis of Manganese Crossings for Turnout System of Sleeper Floating Tracks on Urban Transit, Master thesis, Dongyang University, 2022
  2. J.Y. Choi, K.S Han, J.G. Bong, C.J Jang, J.S. Chung, "Damage Status of Turnout System with Wooden Sleeper of Concrete Track on Urban Transit", Journal of the Convergence on Culture Technology(JCCT), Vol. 5, No. 4, pp. 379-385, 2019.
  3. S.S. Jeon, K.Y Eum, J.M. Kim, "Roadbed Behavior in Managanese Crossing of Turnout System", Journal of the Korean Geotechnical Society, Vol .24, No. 2, pp. 45-57, 2008. https://doi.org/10.7843/KGS.2008.24.2.45
  4. Y.K. Kim, J.G. Jeon, J.H. Lee, J.H. Kim, Y.G. Yoon, S.C. Oh, "Comparison of Characteristics between Turnout Failures due to Insertion of Foreign Substances into Actuating Part and Behavior of Point Machine due to Aging", Journal of the Korean Society for Railway, Vol. 21, No. 9, pp. 870-881, 2018 https://doi.org/10.7782/jksr.2018.21.9.870
  5. Y.K. Kim, T.S. An, Y.S. Song, Y.K. Yoon, J.T. Kim, J.H. Lee, W.H. Kwak, "Comparison and Analysis of Adherence Detector Applied to Turnout", Journal of the Korean Society for Railway, Vol. 22, No. 5, pp. 380-390, 2019. https://doi.org/10.7782/jksr.2019.22.5.380
  6. Y.H. Kim, "A Study on the Evaluation and Prediction of Vibration Associated with Manganese Crossing Turnout", Master thesis, Seoul National University of Technology, 2008.
  7. S.S. Lee, "Improvement Effect Assessment for Crossingin Conventional Line using the Field Test", Master thesis, Seoul National University of Technology, 2007.
  8. K.Y Eum, "Prediction of the Intensity of Vibration Around the Crossing Part of Manganese Turnout", Journal of the Korea Society of Hazard Mitigation, Vol. 8, No. 6, pp. 61-66, 2008.
  9. Y.G. Park, J.H. Um, J.Y. Choi, "Fatigue Life Evaluation for Railway Turnout Crossing using the Field Test", Journal of the Korean Society for Railway, Vol. 9, No. 2, pp. 169-173, 2006.
  10. S.J. Oh, "A Study on Damage Evaluation & Replacement Criteria for Manganese Crossing of Turnout on Urban Railway", Ph.D. thesis, Seoul National University of Science and Technology, 2017
  11. E.S. Choo, M.S. Kim, H.Y. Yoo, C.S. Mo, E.S. Son, S.G. Park, J.W. Lee, "A Design Solution for a Railway Switch Monitoring System", Journal of the Korean Society for Railway, Vol. 18, No. 5, pp. 439-446, 2015. https://doi.org/10.7782/JKSR.2015.18.5.439
  12. S.G Kwon, J.M Seo, Y.J Park, S.B. Park, "A Study on Evaluation of Running Safety of Increasing Speed Vehicle·track in Turnout Rigid Crossing", Journal of The Korean Society For Urban Railway, Vol. 5, No. 3, pp. 859-865, 2017. https://doi.org/10.24284/JKOSUR.2017.09.5.3.859
  13. H..W Ji, S.G Kwon, B.H. Yun, J.M. Seo, "Evalation on Fatigue Durability of Tongue Rail According to Speed-up", Journal of The Korean Society For Urban Railway, Vol. 5, No. 3, pp. 967-973, 2017. https://doi.org/10.24284/JKOSUR.2017.09.5.3.967
  14. Y.G. Park, J.Y Choi, K.Y. Eum, "A Study of Fatigue Damage Factor Evaluation for Railway Turnout Crossing using Qualitative Analysis & Field Test", Journal of the Korean Society of Civil Engineers , Vol. 28, No. 6, pp. 881-893, 2008.
  15. J.Y. Choi, J.G. Bong, J.S. Lee, J.M. Han, J.S. Chung, "Dynamic Behavior of Sleeper Floating Track System(STEDEF) on Urban Rapid Transit According to Replacement of Resilience Pad", Journal of the Convergence on Culture Technology (JCCT), Vol. 6, No. 3, pp. 335-340, 2020.
  16. J.Y. Choi, J.S. Lee, J.G. Bong, S.J. Kim, J.S. Chung, "Evaluation on Fatigue Behavior of Resilience pad for Sleeper Floating Track System in Urban Transit", Journal of the Convergence on Culture Technology(JCCT), Vol. 6, No. 3, pp. 347-352, 2020. https://doi.org/10.17703/JCCT.2020.6.3.347
  17. H.S. Kim, "Damage Effect Analysis for Track Components of Sleeper Floating Track in Urban Transit", Ph.D. thesis, Dongyang University, 2021.
  18. J.Y. Choi, J.Y. Park, K.Y. Lee, J.S. Chung, "A Study on Relationship between Track Impact Factor and Track Support Stiffness of Turnout System on Urban Transit", Journal of the Convergence on Culture Technology(JCCT), Vol. 6, No. 2, pp. 461-466, 2020. https://doi.org/10.17703/JCCT.2020.6.2.461
  19. H.S. Gong, "Cause Analysis and Avoiding Measures of Rail Corrugation for Sleeper Floating Track in Urban Transit, Ph.D. thesis, Dongyang University, 2021.