Dynamic characteristics of the railway ballast bed under water-rich and low-temperature environments

Liu, Jianxing; Liu, Zhiye; Wang, Ping; Kou, Lei; Sysyn, Mykola

doi:10.1016/j.engstruct.2021.113605

Cited by 14 publications

(3 citation statements)

References 34 publications

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“…Gravel ballast accumulates contaminants and requires regular maintenance work for cleaning and restoration [9]. Additionally, the ballast layer serves the purpose of water drainage (precipitation), making its physical and mechanical properties dependent on weather conditions [10]. Such a significant alteration in the load distribution within the ballast, observed when trains travel on different rails supported by the same sleeper, as well as the asymmetry of this distribution along the sleeper's length (figure 3), is an additional factor that can lead to a substantial increase in the accumulation of residual deformations.…”

Section: Option Of Applying the Dual Gauge Track 1 435/1 520 MMmentioning

confidence: 99%

Analysis of stress-strain state changes in railway tracks during transition to European gauge

Fischer,

Kurhan,

Kurhan

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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The geographical location of Ukraine facilitates its integration into the transportation network connecting European countries. Various options exist for transitioning from the gauge of 1 520 mm to the European standard gauge of 1 435 mm. This paper aims to analyze the changes in the stress-strain state of railway track elements during the reconstruction of existing sections from the 1 520 mm gauge to the 1 435 mm European gauge or to a dual gauge of 1 435/1 520 mm. To perform these calculations, a spatial model of dynamic deformations in the railway track is employed, based on the principles of elasticity theory. The implementation of a combined railway track complicates the stress state of the ballast layer, leading to asymmetric stresses along the length of the sleepers, which vary depending on the track on which trains operate. There is also a redistribution of stresses acting on the ground structure, which has been in operation for many years. The research results identify changes in the stress-strain state of the railway track and can be used to justify measures for the appropriate reinforcement of the ballast layer and the ground structure.

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Section: Option Of Applying the Dual Gauge Track 1 435/1 520 MMmentioning

confidence: 99%

Analysis of stress-strain state changes in railway tracks during transition to European gauge

Fischer,

Kurhan,

Kurhan

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…The first integration of the acceleration signal а х and а y by trapezoidal approximation [29][30][31][32][33][34][35][36] makes it possible to establish the speed determined from the formulas:…”

Section: Procedures For Processing Measured Signals Of Accelerationsmentioning

confidence: 99%

Determining the strained state of prefabricated metal corrugated structures of a tunnel overpass exposed to the dynamic loading from railroad rolling stock

Kovalchuk¹,

Koval

Onyshchenko

et al. 2022

EEJET

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This paper reports the analysis of prospects for the use of prefabricated metal corrugated structures in the body of the embankment of a railroad track in the form of a tunnel overpass in order to pass road vehicles and railroad rolling stock. A technique of inertial dynamic tests of the deformed state of a tunnel overpass from prefabricated metal corrugated structures during the passage of railroad rolling stock is given, by measuring accelerations at the top and on the sides of overpass structures. An algorithm is proposed for processing the acceleration signal for assessing the strained state of metal corrugated structures of a tunnel overpass under the action of dynamic load from railroad transport. Experimental dynamic measurements of accelerations arising at the top and on the sides of a tunnel overpass during the passage of passenger and freight railroad rolling stock were carried out. The maximum value of accelerations arising at the top of a tunnel overpass during the passage of a freight train was 7.99 m/s2, and when passing a passenger train – 6.21 m/s2; the maximum accelerations that occur on the sides were 2.63 m/s2 and 1.77 m/s2. It is established that the maximum deformations of metal corrugated structures of the top of a tunnel overpass, when passing freight and passenger trains are, respectively, 1.63 mm and 1.11 mm. The maximum strains of metal corrugated structures on the sides of an overpass are 1.07 mm and 0.48 mm. The value of relative deformations in the vertical and horizontal dimensions of the structures of a tunnel overpass under the action of dynamic loads from the railroad rolling stock has been found. The relative vertical strains of an overpass amounted to 0.020 %; horizontal – 0.012 %. The practical significance of this work is that with the help of the devised procedure for measuring accelerations, it is possible to assess the strained state of metal corrugated structures under the influence of dynamic loads from the railroad rolling stock

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“…The study of the influence of ambient temperature on the thermal stress state of repaired reinforced concrete pipes with metal corrugated structures was carried out in [22]. It is obtained that at the contact of concrete and metal shells there is a significant jump in temperature stresses, which can lead to premature failure of structures.…”

Section: Iianalysis Of Literature Data and Problem Statementmentioning

confidence: 99%

Investigating the temperature field distribution over transport structures' metal corrugated construction surface under temperature influences

Kovalchuk¹,

Kravets

Nabochenko³

et al. 2022

Acta Tech. Jaurinensis

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The experimental studies results of temperature distribution over metal corrugated sheet structure surface at positive and negative ambient temperatures are presented. It is established that the temperature is distributed unevenly over the sheet surface along its plane. An analytical method for calculating the temperature field from a fragment of a structure metal sheet in the case of setting the temperature at the sheet area boundaries is presented. The calculation of the temperature field distribution on the metal sheet of the structure with the setting of the temperature along the contour of the sheet is performed. As a result, it is established that at the metal sheet boundaries there is a temperature difference, which can cause the occurrence of temperature stresses and deformations.

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Dynamic characteristics of the railway ballast bed under water-rich and low-temperature environments

Cited by 14 publications

References 34 publications

Analysis of stress-strain state changes in railway tracks during transition to European gauge

Analysis of stress-strain state changes in railway tracks during transition to European gauge

Determining the strained state of prefabricated metal corrugated structures of a tunnel overpass exposed to the dynamic loading from railroad rolling stock

Investigating the temperature field distribution over transport structures' metal corrugated construction surface under temperature influences

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