The Longitudinal Force Measurement of CWR Tracks with Hetero-Cladding FBG Sensors: A Proof of Concept

Shao, Liyang; Zhang, Meng; Xie, Kaize; Zhang, Xinpu; Wang, Ping; Yan, Lianshan

doi:10.3390/s16122184

Cited by 10 publications

(7 citation statements)

References 13 publications

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“…The results indicate the significant increase of the resistance for the studied cases. A method for accurately determining the longitudinal additional force in CWR on bridges via hetero-cladding fiber Bragg grating (HC-FBG) sensors was proposed in the paper [17]. The methods are based on the measurement of wavelength differences of two FBGs with the change of applied longitudinal force.…”

Section: Review Of the Current Studiesmentioning

confidence: 99%

Monitoring and Evaluation of the Lateral Stability of CWR Track

Atapin

Bondarenko

Sysyn

et al. 2021

J Fail. Anal. and Preven.

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Continuous welded rail (CWR) track has great advantages of low-cost maintenance, environmental influence, and ride comfort. However, the CWR track is subjected to the longitudinal stresses in rails due to temperature influence as well the inhomogeneous stress accumulation due to train loadings. The stresses cause the accelerated track lateral irregularity accumulation that without timely maintenance can cause track buckling. The present paper present a method of the CWR track lateral stability estimation during its lifecycle using the track geometry monitoring information from the track measurement cars. The methods proposes a systematic approach of track stability evaluation based on multiple criteria of track stability evaluation. It takes into account the lateral resistance of the track, actual temperatures, and the lateral geometry condition of the track. The presented case study of a half-year track geometry monitoring and the track stability evaluation in a track curve shows the practical possibility of the recent detection of the track sections with low lateral stability and buckling prevention.

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Section: Review Of the Current Studiesmentioning

confidence: 99%

Monitoring and Evaluation of the Lateral Stability of CWR Track

Atapin

Bondarenko

Sysyn

et al. 2021

J Fail. Anal. and Preven.

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“…Many scholars have studied the longitudinal resistance of seamless lines by establishing a variety of finite-element models to analyse the rail stress, longitudinal force and law of relative motion of the beam and rail. [1][2][3][4][5][6] By applying temperature and railtransverse displacement to the gauge block, the deformation curve of the fastener system under different displacements and temperatures was deduced. 7 Bartos et al 8 established the Vossloh SKL-1 elastic-strip model using finite-element software and determined the position where maximum equivalent stress of the elastic strip under the buckle pressure occurred.…”

Section: Introductionmentioning

confidence: 99%

Longitudinal sliding resistance characteristics of the WJ-8 conventional resistance fastner

Zeng

Wang

Shuaibu

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part F:

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In this paper, the longitudinal resistance and displacement of the WJ-8 conventional resistance fastener under vertical and torque loadings were experimentally conducted and the relationship between longitudinal resistance and displacement was established. To validate the experimental results, numerical simulation using a finite-element model of the fastener was established to obtain the longitudinal resistance variation of the conventional-resistance. Results of the analysis show that both results of the experiment and simulation are in agreements. Furthermore, the skid resistance frictional coefficient of the fastener system under the vertical load was studied and its variation rule under both vertical and torque loads was obtained. The longitudinal sliding resistance of fasteners under different torques and/or vertical loads followed a linear trend. Under load and no-load conditions, the skid-resistance frictional coefficient of the fastener system varied significantly.

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“…Many scholars have studied the longitudinal resistance of seamless lines on different types of bridges analysed the rail stress and longitudinal stress in bridge piers and investigated the law of relative motion of beams and rails based on experimental/field measurements and a variety of wellestablished finite element models [1][2][3][4][5][6][7][8][9][10][11]. Under temperature loading and train loading actions, a long bridge is prone to stretch and deform at the beam end, leading to the traction of the track plate and the relative displacement of the beam and rail.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Sliding of WJ‐8 Small Resistance Fastener Composite Pad

Zeng

Wang

Fushan

et al. 2020

Advances in Civil Engineering

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Under long-term temperature loading, long bridges stretch and deform, causing the beam and rail to move relative to each other. This phenomenon could cause a gradual slide of the rail relative to the fastener composite pad and ultimately results in the slipping out of the fastener pad at the end of the ballastless track bridge changes. The slipping out of the fastener composite pad changes the longitudinal resistance of the fastener and causes shock of the train on the rail structure due to direct contact between the rail and the tie, thus inhibiting the normal use of the line. In this paper, a reciprocating tensile test was carried out on a WJ-8 small resistance fastener to explore the breaking process of the fastener composite pad, identify the interaction mechanism of the fastener composite pad under the rail, and ultimately determine the influence of the pad on the longitudinal resistance of the fastener. The results show that the two factors that affect the longitudinal resistance of the fastener under reciprocating loading are the surface roughness and displacement of the fastener composite pad. While the surface roughness of the fastener composite pad is the main influencing factor in the early stage, the displacement of the composite pad has a greater impact on the later stage. The research results of this paper can provide an important reference for the maintenance and repair of ballastless track fasteners on bridges.

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The Longitudinal Force Measurement of CWR Tracks with Hetero-Cladding FBG Sensors: A Proof of Concept

Cited by 10 publications

References 13 publications

Monitoring and Evaluation of the Lateral Stability of CWR Track

Monitoring and Evaluation of the Lateral Stability of CWR Track

Longitudinal sliding resistance characteristics of the WJ-8 conventional resistance fastner

Experimental Study on the Sliding of WJ‐8 Small Resistance Fastener Composite Pad

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