A mechanistic model of lateral rail head deflection based on fastening system parameters

Chen, Zhe; Andrawes, Bassem

doi:10.1177/0954409716642485

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…As a result, only part of the nominal contact area was effective, which led to the reduction in fastener supporting stiffness. The above discussion is similar to the research of Chen et al [28]. With the growth of the sine cyclic loading numbers, the rail displacement increased gradually.…”

Section: Vertical Displacement Of the Sleeper Slab Tracksupporting

confidence: 88%

Study on the Mechanical Characteristics of the Sleeper Slab Track on a Long-Span Steel Truss Bridge

et al. 2021

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This paper uses the long-span steel truss slab track as its research subject to analyze the new type of sleeper slab track structure with an experimental method. Firstly, a full-scale model was established in the laboratory to form a “rail–sleeper slab–self-compacting concrete cushion–steel beam” composite structure, and a fatigue test was performed on the track structure. The cyclic load was set up as a sine form with a range between 75 and 375 kN at a 5 Hz interval and 3 × 106 cycles. Based on the test, the performance of the track structure under cyclic train load was studied. Secondly, after every 106 loading cycles, the vertical static loading test and horizontal resistance test of the track structure were carried out to obtain the strain and displacement under different loading cycles. Finally, after 3 × 106 cycles of sine cyclic loading, the horizontal ultimate resistance test of the track structure was carried out to study its horizontal failure mode. The aims of this paper were to verify the applicability of the sleeper slab track, identify the mechanical properties, and determine the unfavorable position. The findings can provide an important reference for the practical use of the sleeper slab track structure.

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Section: Vertical Displacement Of the Sleeper Slab Tracksupporting

confidence: 88%

Study on the Mechanical Characteristics of the Sleeper Slab Track on a Long-Span Steel Truss Bridge

et al. 2021

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“…The response of the fastening system to these loads is complex because the forces are transmitted through its several components, which together form the structural and elastic connection between the rail and its base. Therefore, when analysing the behaviour of such a system, it is necessary to observe the transmission of forces through the entire system [33][34][35] and to include all components in the calculation [36]. For an appropriate fastening system design, the mechanical properties of its two main components, the elastic clips and rail pad [6] must be well understood.…”

Section: The Role Of Components In the Mechanical Behaviour Of The Fa...mentioning

confidence: 99%

Development of a new and modification of existing elastic clips for rails fastening

Lakušić¹

2022

JCE

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One of the problems of railway fastening systems (fastening system) that occurs due to the development of railways is the damage of the elastic clips, which leads to the loss of structural integrity between the rail and the base. Therefore, there is a need to develop new clips or improve existing ones. The paper describes the contribution and role of each component of the fastening system in different loading cases. As a tool whose parameters can affect the efficiency of the fastening system, special attention is given to the clips. Finally, an example is briefly described for creating numerical models that can be used to perform parametric analyses in order to develop new clips or improve existing ones.

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“…Multiple approaches could be pursued to quantify the magnitude and distribution of stress within the spikes when driven into a timber crosstie. Common methods within the rail industry to analyze and quantify the spike stress state or test new fastening system components consist of finite element models (FEMs) (4,(8)(9)(10)(11), laboratory testing (12), or field-experimental programs (13)(14)(15)(16)(17).…”

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confidence: 99%

Analytical Method to Estimate Railroad Spike Fastener Stress

Dersch

Silva

Edwards

et al. 2020

Transportation Research Record: Journal of the Transportation R

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Previous research indicates that spike fastener fatigue failures have led to at least ten derailments since 2000. Given that railroads continue to install fastening systems that have experienced spike failures, methods to quantify the stress state of the spike must be developed. Common approaches to quantify the effect of key variables include laboratory experimentation, field instrumentation, or finite element model development. However, these approaches may be both time and cost prohibitive. An analytical method based on beam on elastic foundation mechanics, similar to the analysis of laterally loaded piles in deep foundation design, was developed to estimate the spike stresses. The outcome is a laboratory-validated analytical approach that generates estimates of spike stress. This analytical model was used to investigate key design criteria (timber modulus, spike cross-sectional area, and load applied) that could be changed to improve the resiliency of the fastening system to increase railroad safety. Another outcome of this study is the development of an instrumented spike that quantifies the spike demands when installed and loaded within a crosstie.

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A mechanistic model of lateral rail head deflection based on fastening system parameters

Cited by 4 publications

References 12 publications

Study on the Mechanical Characteristics of the Sleeper Slab Track on a Long-Span Steel Truss Bridge

Study on the Mechanical Characteristics of the Sleeper Slab Track on a Long-Span Steel Truss Bridge

Development of a new and modification of existing elastic clips for rails fastening

Analytical Method to Estimate Railroad Spike Fastener Stress

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