American Society of Civil Engineers


Influence of Beam-End Lateral Expansion of Steel Truss Girder on Stability of CWR Track


by Shunxi Quan, (MOE Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Chengdu, China. E-mail: jdqsx@126.com), Yao Zhang, (MOE Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Chengdu, China. E-mail: 307609449@qq.com), and Ping Wang, (MOE Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Chengdu, China. E-mail: wping@home.swjtu.edu.cn)
Section: Transportation Facilities, Infrastructure, and Pavements, pp. 1690-1695, (doi:  http://dx.doi.org/10.1061/41184(419)279)

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Document type: Conference Proceeding Paper
Part of: ICTE 2011
Abstract: In order to obtain influence law of beam-end lateral expansion of steel truss girder on stability of CWR track, finite element method was used to establish the mechanical model of lateral expansion and bending of CWR track, and corresponding formula was deduced and computation program was developed. The model was used for studying on stability of CWR track under the action of temperature force taking posterior track alignment after beam-end having relative expansion to subgrade as initial bending. The results indicate that beam-end lateral expansion of steel truss girder has significant influence on the stability of CWR track, and to prevent the buckling of CWR track at beam-end some measures should be taken such as optimizing bridge structure and bearing arrangement.


ASCE Subject Headings:
Beams
Trusses
Girders
China
Railroad tracks
High-speed rail