Optimal Shape Design of Concrete Sleepers under Lateral Loading Using DEM

Despite the significant contribution of sleepers to the lateral resistance of ballasted tracks, limited research has focused on improving the shape of sleepers in this aspect. This study aims to evaluate proposed sleeper shapes based on the B70 form, utilizing a linear optimization algorithm. First,...

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Bibliographic Details
Published inBuildings (Basel) Vol. 13; no. 7; p. 1574
Main Authors Chalabii, Jafar, Movahedi Rad, Majid, Hosseini, Seyedsaber
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.07.2023
Subjects
Algorithms
Analysis
ballasted tracks
discreet element modelling
Discrete element method
Energy consumption
Friction
Geometry
Lateral forces
Lateral loads
lateral resistance
Mathematical optimization
optimization
Optimization algorithms
Railroad ballast
Railroad ties
Railroads
Railway tracks
Sensitivity analysis
Shape optimization
sleeper shape
Weight
Online AccessGet full text
ISSN2075-5309
2075-5309
DOI10.3390/buildings13071574

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Summary:Despite the significant contribution of sleepers to the lateral resistance of ballasted tracks, limited research has focused on improving the shape of sleepers in this aspect. This study aims to evaluate proposed sleeper shapes based on the B70 form, utilizing a linear optimization algorithm. First, a DEM model was verified for this purpose using the outcomes of the experiments. Then, using this model, the effect of the weight of the B70 sleeper was carried out on lateral resistance. Next, suggested shapes contacted with ballast materials were applied to lateral force while maintaining the mechanical ballast’s properties until a displacement of 3.5 mm was achieved. The current study’s results showed that the rate of lateral resistance increasing becomes lower for weights higher than 400 kg. Additionally, it was demonstrated that the sleeper’s weight will not always increase lateral resistance. The findings also indicated that although some proposal shapes had higher lateral resistance in comparison to other forms, these designs are not practical from an economic standpoint. Furthermore, despite the lower weight of some other suggested shapes in comparison with B70, the lateral resistances are 31.2% greater. As a result, it is possible to recommend employing a proposed sleeper rather than a B70 sleeper.
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ISSN:2075-5309
2075-5309
DOI:10.3390/buildings13071574