KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지
DOI QR코드

DOI QR Code

Torsional Behavior of Ballastless Railway Plate Girder Bridge

무도상 철도판형교의 비틀림거동 특성

  • 현승혁 (인하대학교 토목공학과) ;
  • 황원섭 (인하대학교 사회인프라공학과) ;
  • 박성준 (인하대학교 토목공학과)
  • Received : 2020.11.20
  • Accepted : 2020.12.19
  • Published : 2021.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, the effect on the lateral and torsional behavior of ballastless railway plate girder bridge by the installation of the lower horizontal bracing has been reviewed. First of all, the most efficient lower bracing arrangement has been reviewed by comparing and examining the lateral displacement due to the train load, targeting analysis models with different arrangement types of lower bracing. Next, the research on torsional behavior of plate girder bridge with lower bracing has been conducted. In addition, the torsion constant from FEM analysis results has been compared with the torsion constant of a railroad plate girder bridge with a closed section by substituting the upper and lower horizontal bracing with equivalent thickness. Based on this comparison, the impact on the bridge span length and the cross section area of the lower bracing has been examined. Through this study, the curve graph related to lateral buckling moment and torsional constant ratio is presented and the range of plate girder bridge requiring torsional reinforcement is proposed.

본 논문에서는 하부수평브레이싱 설치에 따른 무도상 철도판형교의 횡방향 및 비틀림거동에 관한 영향을 검토하였다. 우선 하부브레이싱의 부재 배치 형태가 다른 해석모델을 대상으로 하여 열차하중에 의한 횡방향변위를 비교 검토하여 가장 효율적인 하부 브레이싱의 배치에 대하여 검토하였다. 다음으로는 하부브레이싱을 설치한 2주형 철도판형교의 비틀림거동에 대해 검토를 수행하였다. 또한, FEM 해석결과로부터 구한 비틀림상수와 상부와 하부수평브레이싱을 등가두께로 치환하여 폐합단면으로 하는 철도판형교의 비틀림상수를 비교하였고, 교량의 지간길이와 하부브레이싱의 단면적의 영향을 검토하였다. 이와같은 해석결과를 기초로 본 연구에서는 횡좌굴모멘트와 비틀림상수비와의 관계곡선을 제시하였고 비틀림보강이 필요한 철도판형교의 범위를 제안하였다.

Keywords

Acknowledgement

이 연구는 국토교통부 국토교통기술촉진연구사업(20RTRP-B137949-04)에 의해 수행되었습니다. 본 논문은 2020 CONVENTION 논문을 수정·보완하여 작성되었습니다.

References

  1. Cho, E. S., Kim, H. M., Hwang, W. S. and Oh, J. T. (2006). "Dynamic characteristics of railway plate girder bridges with increase of diesel locomotive speed." Journal of Korean Society of Steel Construction, Vol. 18, No. 6, pp. 769-781 (in Korean).
  2. Heins, C. P. (1975). Bending and torsional design in structural members, Lexington Books, Washington, DC, United States.
  3. Hwang, W. S., Cho, E. S., Oh, J. T. and Kim, H. M. (2007a). "Dynamic response and reinforcement of the railway plate girder bridges." Journal of Korean Society of Steel Construction, Vol. 19, No. 3, pp. 281-290 (in Korean).
  4. Hwang, M. O., Yoon, T. Y., Park, Y. M., Joe, W. D. J. and Hwang, S. Y. (2007b). "Effects of lateral bracing on the load distribution and torsional behaviors in continuous two-girder bridges." Journal of Korean Society of Steel Construction, Vol. 19, No. 6, pp. 671-680 (in Korean).
  5. Hyun, S. H. (2021). Transverse and torsional behavior on ballastless railway plate girder bridge, Master's Thesis, Department of Civil Enginnering, Inha University, Incheon, Korea (in Korean).
  6. Kim, S. J., Jeon, J. S., Won, D. H. and Kang, Y. J. (2012). "Torsional and wraping constants of i-shaped plate girders with a sine corrugated web." Journal of the Korean Society of Civil Engineers, KSCE, Vol. 32, No. 6A, pp. 347-354 (in Korean). https://doi.org/10.12652/Ksce.2012.32.6A.347
  7. Kollbrunner, C. F. and Basler, K. (1969). Torsion in structures an engineering approach, Springer-Verlag, Berlin, Heidelberg, GmbH, German.
  8. Koo, H. W. (2006). Dynamic behavior and performance improvement of the railway plate girder bridges, Master's Thesis, Department of Civil Enginnering, Inha University, Incheon, Korea (in Korean).
  9. Lee, H. D., Lee, S. J. and Moon, J. H. (2019). "Theoretical evaluation of section properies of ballastless plate girder bridge's superstructure." Journal of Korean Society for Urban Railway, Vol. 7, No. 3, pp. 343-353. https://doi.org/10.24284/JKOSUR.2019.9.7.3.343
  10. Nakai, H. and Kita, T. (1992). Basics of steel bridge design, Public Publishing Inc., Japan.
  11. Park, S. J. (2019). Reinforcement effect of lower bracing on dynamic behavior characteristic in railway plate girder bridges, Master's Thesis, Department of Civil Enginnering, Inha University, Incheon, Korea (in Korean).
  12. Shim, N. H. and Park, Y. S. (2006). "Experimental study on the top-lateral bracing of u-type steel box girders using real size specimen: Torsional stiffness." Journal of Korean Society of Steel Construction, Vol. 18, No. 4, pp. 447-455.
  13. Yoon, D. Y., Lee, D. S. and Lee, S. C. (2003). "Ultimate strength behavior of compression flanges in steel box girder bridges-(II) ultimate optimum rigidity of longitudinal stiffeners." Journal of the Korean Society of Civil Engineers, KSCE, Vol. 23, No. 5A, pp. 1049-1056 (in Korean).