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- W2766597913 abstract "At the transition zone or sometimes called 'bridge end' or 'bridge approach', the stiffness difference between plain track and track over bridge often causes aggravated impact loading due to uneven train movement onto the area. The differential track settlement over the transition has been a classical problem in railway networks, especially for the aging rail infrastructures around the world. This problem is also additionally worsened by the fact that the construction practice over the area is difficult, resulting in a poor compaction of formation and subgrade. This paper presents an advanced hybrid simulation using coupled discrete elements and finite elements to investigate dynamic interaction at the transition zone. The goal is to evaluate the dynamic stresses and to better understand the impact dynamics redistribution at the bridge end. An existing bridge 'Salt Pan Creek Railway Bridge', located between Revesby and Kingsgrove, has been chosen for detailed investigation. The Salt Pan Bridge currently demonstrates crushing of the ballast causing significant deformation and damage. Thus, it's imperative to assess the behaviours of the ballast under dynamic loads. This can be achieved by modelling the nonlinear interactions between the steel rail and sleeper, and sleeper to ballast. The continuum solid elements of track components have been modelled using finite element approach, while the granular media (i.e. ballast) have been simulated by discrete element method. The hybrid DE/FE model demonstrates that ballast experiences significant stresses at the contacts between the sleeper and concrete section. These overburden stress exists in the regions below the outer rails, identify fouling and permanent deformation of the ballast." @default.
- W2766597913 created "2017-11-10" @default.
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- W2766597913 date "2017-10-01" @default.
- W2766597913 modified "2023-09-23" @default.
- W2766597913 title "Hybrid Discrete Element - Finite Element Simulation for Railway Bridge-Track Interaction" @default.
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- W2766597913 doi "https://doi.org/10.1088/1757-899x/251/1/012016" @default.
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