Journal ArticleDOI
Load impact on railway track due to unsupported sleepers
Andreas Lundqvist,Tore Dahlberg +1 more
- Vol. 219, Iss: 2, pp 67-77
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In this paper, the authors show that railway tracks will settle as a result of permanent deformations in the ballast and in the underlying material layers, caused by repeated traffic loading and the sev...Abstract:
Ballasted railway tracks will settle as a result of permanent deformations in the ballast and in the underlying material layers. The settlement is caused by the repeated traffic loading and the sev ...read more
Citations
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Journal ArticleDOI
A review of loading conditions for railway track structures due to train and track vertical interaction
TL;DR: In this paper, a review of the typical characteristics of the loading conditions for railway track structures, in particular, impact loads due to the wheel/rail interaction, is presented, with particular emphasis on the typical shapes of the impact load waveforms generally found on railway tracks.
Journal ArticleDOI
Dynamic Stress Analysis of a Ballasted Railway Track Bed during Train Passage
TL;DR: In this article, the effects of train speed, acceleration/braking, geometric variation in rail head level, and a single unsupported sleeper on railway subgrades were investigated by means of a two-dimensional dynamic finite element analysis.
Journal Article
Railway Track Stiffness Variations - Consequences and Countermeasures
TL;DR: In this article, it is demonstrated that by modifying the track stiffness variations along the track, for example by use of grouting or under-sleeper pads, the variations of the wheel/rail contact force may be considerably reduced.
Journal ArticleDOI
Comparing carbon nanotubes and graphene nanoplatelets as reinforcements in polyamide 12 composites.
TL;DR: In this study, it is observed that CNT fillers bring about more pronounced improvements in PA12 compared to graphene nanoplatelets, as far as mechanical and electrical properties are concerned.
Journal ArticleDOI
Reducing railway track settlement using three-dimensional polyurethane polymer reinforcement of the ballast
TL;DR: In this article, the measured settlement results of full-scale testing of unreinforced and polymer reinforced ballast railway track under laboratory conditions, using the GRAFT I (Geopavement and Railways Accelerated Fatigue Testing) facility to show the significant reduction in track settlement that can be obtained using in-situ ballast reinforcement techniques.
References
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Book
Nonlinear Finite Elements for Continua and Structures
TL;DR: In this paper, the authors present a list of boxes for Lagrangian and Eulerian Finite Elements in One Dimension (LDF) in one dimension, including Beams and Shells.
Journal ArticleDOI
Vertical dynamic interaction between train and track influence of wheel and track imperfections
Jens C. O. Nielsen,A. Igeland +1 more
TL;DR: In this article, the vertical dynamic behavior of a railway bogie moving on a rail is investigated for sleepers resting on an elastic foundation, and the transient interaction problem is numerically solved by use of an extended state-spacer vector approach in conjunction with a complex modal superposition for the track.
Journal ArticleDOI
Some railroad settlement models—A critical review:
TL;DR: In this paper, the authors reviewed and commented upon mathematical models to simulate railroad track settlements and found that there do not seem to be any generally accepted damage and settlement equations describing the long-term b...
Journal ArticleDOI
Japanese Studies on Deterioration of Ballasted Track
TL;DR: In this paper, the authors investigated the track deterioration due to ballast settlement in the Tokaido Shinkansen and proposed the coefficient of track deterioration, which was later extended to track irregularity.