In this paper, a finite-element (FE) model including the track super- and substructure components was developed for seismic analysis of railway track. In the developed model, the beam elements were used to define rails and sleepers as components of track superstructures. Moreover, a series of lumped masses with springs and dashpots was considered for modeling the ballast, subballast, and subgrade as track substructure components. In order to validate the FE model, the results of seismic numerical analysis were compared with the outputs of a shaking table test. In the next stage, using the validated FE model, the efficient excited length of the track during the Kobe earthquake was determined around 40 m as the length that created the maximum internal forces and deformations in track components. Finally, using the evaluated effective length and adopting the artificial accelerograms with various peak ground acceleration (PGA) values in the range of 2 to 10 (200 to 1,000 Gal) as input motion, the seismic behavior of the ballasted railway track was studied, and consequently the effect of PGA values on rail buckling length and its deformations as well as rail and sleeper internal forces were investigated.
Investigating Seismic Behavior of Ballasted Railway Track in Earthquake Excitation Using Finite-Element Model in Three-Dimensional Space
Journal of Transportation Engineering ; 139 , 7 ; 697-708
2012-12-29
122013-01-01 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
British Library Online Contents | 2013
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