Experimental assessment of dynamic lateral resistance of railway concrete sleeper

Esmaeili, Morteza; Hosseini, S.A.; Sharavi, Majid

doi:10.1016/j.soildyn.2015.11.011

Cited by 29 publications

(17 citation statements)

References 9 publications

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“…It can be claimed that the effective mass of sleeper-ballast lateral interaction is equal to the mass of shoulder zone at the high impact loads, which is justified on account of the base and crib zones failure to provide the required DLR. 14 On the other hand, in the second approach, the attention is restricted to the lateral interaction forces. On the basis of experimental results, the sleeper base zone had more contribution in total lateral resistance on account of the effective friction between sleeper and ballast particles.…”

Section: Contribution Of Base Crib and Shoulder Zones In Total Latementioning

confidence: 99%

“…In spite of their merit in assessment of sleeper lateral resistance in a static manner, the dynamic nature of train loads and consequently the inertia effects of sleeper have been excluded. For this reason, Esmaeili et al 14 developed a pendulum loading test device (PLTD) in laboratory to take these effects into account by implementation of a novel methodology including lateral impact tests on a concrete sleeper.…”

Section: Introductionmentioning

confidence: 99%

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Effect of different contact surfaces between concrete sleeper and ballast on mobilized lateral resistance against impact loads

Hosseini

Esmaeili

2016

Proceedings of the Institution of Mechanical Engineers, Part F:

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The amount of ballast particles surrounding a railway track significantly influences its resistance in all directions. As time goes by, with the development of high-speed trains, more attention has been paid to this issue owing to the increase in dynamic effects of rolling stock on track loading. The focus of the present study is on the investigation of the interaction between different surfaces (base, crib, and shoulder) of concrete sleeper and their adjacent ballast layer along with the related parameters under lateral impact loading condition. In this regard, by utilizing a pendulum loading test device, a number of lateral impact tests were conducted on an instrumented concrete sleeper in laboratory. On the basis of experimental results, the average contribution of base, crib, and shoulder zones in the total dynamic lateral resistance of sleeper was calculated as 48%, 23%, and 29%, respectively. Furthermore, in the lateral impact force domain of 13-28 kN, the sleeper-ballast dynamic friction coefficient at base and crib zones varied in the ranges 0.8-1.5 and 0.5-0.6. Moreover, a maximum impact factor of 2.5 was obtained for analysis and design purposes. It should be stated that the trend of laboratory results confirmed the common static friction coefficient of 0.8.

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Section: Contribution Of Base Crib and Shoulder Zones In Total Latementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of different contact surfaces between concrete sleeper and ballast on mobilized lateral resistance against impact loads

Hosseini

Esmaeili

2016

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…Grassie [21] shows that the uniform beam can be used to model a non-uniform section sleepers. The dynamic lateral resistance of the sleeper has been studied to better understand the interaction zones between the sleeper and the ballast layer [22]. By using experimental and numerical methods, Laryea et al [23] compared the performance of sleepers made out of different materials.…”

Section: Introductionmentioning

confidence: 99%

A Fast Analytic Method to Calculate the Dynamic Response of Railways Sleepers

Tran

Hoang

Duhamel

et al. 2018

Journal of Vibration and Acoustics

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Existing analytical models for railway tracks consider only one rail supported by a continuous foundation or periodic concentrated supports (called the periodically supported beam). This paper presents an analytical model for a railway track which includes two rails connected by sleepers. By considering the sleepers as Euler–Bernoulli beams resting on a Kelvin–Voigt foundation, we can obtain a dynamic equation for a sleeper subjected to the reaction forces of the rails. Then, by using the relation between the rail forces and displacements from the periodically supported beam model, we can calculate the sleeper responses with the help of Green's function. The numerical applications show that the sleeper is in flexion where the displacement at the middle of the sleeper is greater than those at the rail seats. Moreover, the deformed shape of the sleeper is nonsymmetric when the loads on the two rails are different. The model result agrees well with measurements performed using instrumented sleeper in situ

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“…9 In order to assess the critical lateral force required for the displacement of railway tracks, various formulas and values have been proposed. 10,11…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental analysis of single tie push tests on different shapes of concrete sleepers in ballasted tracks

Jing

Aela

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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The lateral displacement of sleepers is one of the key issues in railroads, which is caused by different factors such as the geometry of the ballast layer as well as the shape of the sleepers. Several methods have been proposed to improve the lateral resistance of sleepers on ballasted tracks. In this paper, a series of single tie push tests have been carried out to assess the performance of end-winged, middle-winged, and bumped sleepers on ballasted tracks with a variety of shoulder ballast widths and heights. Based on the experimental results, 500 mm and 150 mm were proposed as the optimum shoulder width and height, respectively. In addition, among the abovementioned sleepers, the EW_sleeper shows a significant increase in the total lateral resistance. Discrete element method (DEM) simulations were performed using PFC3D to determine the optimum size of the EW_sleeper wings. It was found that using a pair of wings measuring 14 cm in length and 13 cm in width can increase the lateral resistance compared to other alternatives.

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Experimental assessment of dynamic lateral resistance of railway concrete sleeper

Cited by 29 publications

References 9 publications

Effect of different contact surfaces between concrete sleeper and ballast on mobilized lateral resistance against impact loads

Effect of different contact surfaces between concrete sleeper and ballast on mobilized lateral resistance against impact loads

A Fast Analytic Method to Calculate the Dynamic Response of Railways Sleepers

Numerical and experimental analysis of single tie push tests on different shapes of concrete sleepers in ballasted tracks

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