Sensitivity of the ballast resistance and track irregularity on the track stability

궤도 안정성에 대한 도상저항력과 궤도틀림의 민감도

  • Received : 2005.08.03
  • Accepted : 2005.10.10
  • Published : 2005.10.27

Abstract

During summer, very high compressive force occurs on the continuous welded rail (CWR) track because of the increase of rail temperature (max. $60^{\circ}C$). This extreme temperature stress can cause the CWR track to buckle. Among many CWR parameters affecting the track buckling, the influence of the lateral and longitudinal ballast resistance was investigated on the stability of the CWR track in this study. Also, the sensitivity of the track irregularity such as the alignment defect and the gauge irregularity was investigated.

Acknowledgement

Supported by : 한국학술진흥재단

References

  1. 양신추, 김은(2002) 곡선부 궤도의 최소좌굴강도 추정식의 개발, 대한토목학회 논문집, 대한토목학회, 제22권, 제 5-D호, pp. 957-967
  2. 양신추, 김은, 서사범(2002) 기존선 급곡선부 장대레일 좌굴 의 신뢰성 평가 및 안정성 확보방안 연구, 대한토목학회논문집, 대한토목학회, 제22권, 제4-D호, pp. 721- 731
  3. 임남형, 강영종, 성익현(2003) 온도하중에 의한 궤도구조의 거동, 대한토목학회 논문집, 대한토목학회, 제23권, 제 1-D호, pp. 97-105
  4. ERRI Specialist's Committee D202, and Van, M.A. (1999) Stability of continuous welded rail track, ERRI D202/RP4, European Rail Research Institute
  5. Jackson, J.E., Bauld, N.R., Ramesh, M.S., and Menon, S.C.(1988) A superelement for lateral track deformation, Appl. Mech. Rail Transport Symp., pp. 7-18
  6. Kerr, A.D.(1978) Thermal buckling of straight tracks; fundamentals, analyses, and preventive measures, FRA/ORD-78/49, Washington, D.C., USA
  7. Kish, A. Samavedam, G., and Jeong, D.(1982) Analysis of thermal buckling tests on U.S. Railroads, FRA/ORD-82/45, Washington, D.C., USA
  8. Lim, N.H., and Sung, I.H.(2004) Thermal buckling behavior of continuous welded rail track, Int. J. Steel Structures, Korea Society of Steel Construction, Vol.4, No.2, pp. 111-119
  9. Lim, N.H., Park, N.H., and Kang, Y.J.(2003) Stability of continuous welded rail track, Computers & Structures, Vol.81, No.22/23, pp. 2219-2236 https://doi.org/10.1016/S0045-7949(03)00287-6
  10. Ramesh, M.S.(1985) A nonlinear finite element approach to the analysis of lateral thermal and mechanical buckling of railroad tracks, Master Thesis, Clemson University, USA
  11. Samavedam,G.(1979) Buckling and post buckling analysis of CWR in the lateral plane, Technical Note TN-TS-34, British Railways Borad