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Construction & building materials v.134, 2017년, pp.269 - 278   SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Numerical analysis of new pre-installed steel modular railroad track assembly

Liu, Dan (MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, PR China ); Su, Chengguang (MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, PR China ); Ren, Juanjuan (MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, PR China ); Wang, Linbing (Charles E. Via Jr. Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg 24061, United States ); Kendrick, Buck (Retired Engineer, Lanexa 23089, United States ); Liu, Xueyi (MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, PR China );
  • 초록  

    Abstract Due to the modularity of the traditional track and the discreteness of the ballast bed, the application of the repeated and random train load would inevitably result in the accumulation of residual deformation and the track damage. A new steel pre-installed modular railroad track assembly was designed to provide better stability and reduce deformation. It includes a plurality of spaced-apart cross-ties, two side ties, intermediate ties and a pair of rails road track rails. In order to figure out the mechanical performance of this new steel pre-installed modular railroad track assembly, the 3-D finite element model of the steel modular railroad track including with the track, ballast bed, sub-ballast and the sub-grade was built. In this model, the load distribution and the vertical deformation of ties with different cross sections were discussed, and the stresses of the steel modular railroad track and the ballast bed were analyzed. The results indicate that, compared with the traditional track, the single wheel load will transfer to more ties of the new steel modular railroad track and the integrality of the new steel modular railroad track is much better. The maximum deflection of the steel modular railroad track located at the point of load application (under the wheel load). It is much smaller than that of the traditional track. As a result, it can be concluded that the new steel modular railroad track is more likely to induce less deflection under the series wheel load and have better rail regularity. Highlights A new pre-installed steel modular railroad track assembly was introduced. A 3-D FEM of the new steel modular railroad track assembly was established. The mechanical characteristics of the new structure was analyzed and compared with traditional track. Recommendation of the cross section of the cross ties was put forward.


  • 주제어

    Steel modular railroad track assembly .   Finite element method .   Load distribution .   Rail deflection.  

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