Assessment of the impact of the electromagnetic field of the catenary system on crack formation in reinforced concrete supports

Li, V. N.; Demina, Lyudmila; Vlasenko, S. A.; Tryapkin, Evgeniy

doi:10.1088/1757-899x/918/1/012118

Cited by 8 publications

(8 citation statements)

References 20 publications

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“…Scheme for calculating the mutual induction resistance of the catenary system and rails of a one-track section: R1 and R2 are rails, ar is a track width, R1e is an equivalent rail, LB is a loadbearing cable, CW is a contact wire. , the mutual induction resistance between the catenary system and the rails of a one-track section (for Z = 314 rad/s) [19] can be calculated using the following formula: 5652,908 0, 0628 ln 0, 0314 0, 0493…”

Section: Figmentioning

confidence: 99%

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Algorithm for calculating the rail-ground potential in heavy load conditions

et al. 2021

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Increased freight turnover on railway transport inevitably leads to increased traction current in DC and AC traction power supply systems. The increase in traction current is already causing problems related to the normal operation of the 25 kV AC traction power supply systems. One of the adverse consequences of the increased traction currents is the increased rail-to-ground potential. This has already caused a number of accidents and related traffic interruptions on the Far Eastern Railway of Russia and other railway sections powered with alternating current. The study considers the problem of increased rail-to-ground potentials and provides basic formulae for calculating the wave parameters of the rail network and rail-to-ground potentials. Various methods are given for calculating rail-to-ground potentials for a 25 kV AC traction power supply system. Since in an alternating current system, expressions for calculating the potential are functions of a complex variable, the calculation of such expressions requires the use of special programs. Adaptation of existing methods to modern software and computing systems allows you to optimize and significantly speed up the process of calculating the “rail-to-ground” potentials, either considering the use of certain potential-reducing measures or not. A calculation method includes an algorithm developed for calculating the rail-to-ground potentials in the 25 kV AC traction power supply system for an inter-substation zone of any length with any number of electric locomotives within the zone.

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Section: Figmentioning

confidence: 99%

“…In accordance with the recommendations of [19], the last monomial of expression ( 4) can be ignored due to its smallness. Finally, the formula for calculating the mutual induction resistance is written as:…”

Section: Introductionmentioning

confidence: 99%

Algorithm for calculating the rail-ground potential in heavy load conditions

et al. 2021

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“…The most current (multi-billion) issue is the reinforcement corrosion in constructions of this type. However, it is only one of many possible defects [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Analysis of the Magnetization Methods Used in the Magnetic Nondestructive Testing of Reinforced Concrete Structures

Frankowski,

Chady

2023

Materials

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This work presents how significantly the proper selection of the magnetization method can improve almost all parameters of the magnetic method and affect the effectiveness of the evaluation of reinforced concrete (RC) structures. Three magnetization methods are considered in this paper: opposite pole magnetization (typical solution), same pole magnetization, and (as a reference point) no magnetization. The experiments are carried out in a three-dimensional (XYZ) space. Measurements along each of the axes are discussed in a separate section. The results show that the appropriate selection of the magnetization method can affect noise reduction, signal strength, and the separation of measurements carried out on different samples. This paper also discusses the situations when the magnetization may change the shape, cause deformations of waveforms, affect the area testing, and be used to significantly increase the efficiency of simultaneous evaluation of three basic parameters of RC structure. Experiments and simulations have proven that properly applied magnetization may strongly affect the evaluation’s effectiveness, making the magnetic method one of the most promising techniques in testing RC constructions.

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“…The stability and safety of catenary power supply of electrified high-speed railway lines can be effectively guaranteed by doing a good job in the research of catenary portal structure vibration [3,4]. The portal structure not only bears the dynamic lift force between the pantograph and the contact line, but also bears the axial force transmitted to the strut by the bull foot foundation of the strut [5,6]. The portal structure is subjected to complex and variable loads.…”

Section: Introductionmentioning

confidence: 99%

Vibration Characteristics Analysis and Structure Optimization of Catenary Portal Structure on Four-Wire Bridge

Wang¹,

Li²

2022

Structural Durability &Amp; Health Monitoring

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The portal structure is the support equipment in the catenary, which bears the load of contact suspension and support equipment. In practical work, with the change of external forces, the support equipment bears complex and changeable loads, so it has higher requirements for its reliability and safety. In order to study the dynamic characteristics of catenary portal structure on continuous beam of four-way bridge, taking the catenary portal structure on Dshaping four-way bridge as the research object, the portal structure simulation model of bridgenetwork integration was established in Midas Civil. The maximum point of deformation and stress was determined by finite element analysis of catenary hard span equipment, and the frequency and mode of natural vibration of hard span were obtained by modal analysis. Secondly, through the field dynamic stress acquisition test, combined with the results of finite element analysis, the fault location is determined, and the vibration characteristics are analyzed. Finally, based on the results of modal analysis and vibration analysis, the method that the vibration of portal structure beam is affected by structural stiffness and vibration frequency amplitude is proposed. The torsional vibration of the portal structure beam was suppressed by increasing the stiffness of the beam and reducing the vibration conduction between the trolley and the beam, and the hard cross beam was optimized by strengthening the hanging column and the connecting beam and adding diagonal support between the pillar and the portal structure beam. By comparing the values of shear, bending moment, displacement and dynamic stress on the hard span before and after optimization, the amplitude peak after structural optimization is reduced by about 25%, and the application of oblique support and reinforcement of the beam can significantly improve the portal structure vibration.

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Assessment of the impact of the electromagnetic field of the catenary system on crack formation in reinforced concrete supports

Cited by 8 publications

References 20 publications

Algorithm for calculating the rail-ground potential in heavy load conditions

Algorithm for calculating the rail-ground potential in heavy load conditions

A Comparative Analysis of the Magnetization Methods Used in the Magnetic Nondestructive Testing of Reinforced Concrete Structures

Vibration Characteristics Analysis and Structure Optimization of Catenary Portal Structure on Four-Wire Bridge

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