Experimental study on dynamic performance of typical nonballasted track systems using a full-scale test rig

Wang, Mingze; Cai, Chengbiao; Zhu, Shengyang; Zhai, Wanming

doi:10.1177/0954409716634751

Cited by 31 publications

(16 citation statements)

References 17 publications

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“…The transmission characteristics of the ballastless tracks from rail to slab, and from rail to base are illustrated in Fig. 17 [26]. As seen from the results, a peak can be identified in each transfer function at frequencies between 160 and 200 Hz for the CRTS I, II and III slab tracks of three-layer structure (shown in Fig.…”

Section: Dynamic Test Of the High-speed Railway Ballastless Track-submentioning

confidence: 93%

“…Therefore, railway engineers have been facing increasing requirements for evaluating the dynamic performance of different ballastless track systems. To investigate the dynamic performance of the ballastless track systems and to study the dynamic transfer function of Full-scale multi-functional test platform for investigating mechanical performance of track… different ballastless track structures, the authors' research team conducted comprehensive dynamic tests with the wheel-drop testing vehicle based on the developed platform [26] (Fig. 16).…”

Section: Dynamic Test Of the High-speed Railway Ballastless Track-submentioning

confidence: 99%

“…The detailed results of this dynamic test with wheel-drop testing vehicle can be referred to in Ref. [26] published by the authors.…”

Section: Dynamic Test Of the High-speed Railway Ballastless Track-submentioning

confidence: 99%

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Full-scale multi-functional test platform for investigating mechanical performance of track–subgrade systems of high-speed railways

et al. 2020

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Motivated by the huge practical engineering demand for the fundamental understanding of mechanical characteristics of high-speed railway infrastructure, a full-scale multi-functional test platform for high-speed railway track–subgrade system is developed in this paper, and its main functions for investigating the mechanical performance of track–subgrade systems are elaborated with three typical experimental examples. Comprising the full-scale subgrade structure and all the five types of track structures adopted in Chinese high-speed railways, namely the CRTS I, the CRTS II and the CRTS III ballastless tracks, the double-block ballastless track and the ballasted track, the test platform is established strictly according to the construction standard of Chinese high-speed railways. Three kinds of effective loading methods are employed, including the real bogie loading, multi-point loading and the impact loading. Various types of sensors are adopted in different components of the five types of track–subgrade systems to measure the displacement, acceleration, pressure, structural strain and deformation, etc. Utilizing this test platform, both dynamic characteristics and long-term performance evolution of high-speed railway track–subgrade systems can be investigated, being able to satisfy the actual demand for large-scale operation of Chinese high-speed railways. As examples, three typical experimental studies are presented to elucidate the comprehensive functionalities of the full-scale multi-functional test platform for exploring the dynamic performance and its long-term evolution of ballastless track systems and for studying the long-term accumulative settlement of the ballasted track–subgrade system in high-speed railways. Some interesting phenomena and meaningful results are captured by the developed test platform, which provide a useful guidance for the scientific operation and maintenance of high-speed railway infrastructure.

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Section: Dynamic Test Of the High-speed Railway Ballastless Track-submentioning

confidence: 93%

Section: Dynamic Test Of the High-speed Railway Ballastless Track-submentioning

confidence: 99%

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Full-scale multi-functional test platform for investigating mechanical performance of track–subgrade systems of high-speed railways

et al. 2020

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“…The China Railway Track System (CRTS) II slab track is adopted in the model. It consists of rail, rail pads, concrete slab, a cement asphalt (CA) mortar layer, and concrete base [38]. The rail is simulated as the Euler beam, which is supported by the discrete springs and dashpots to represent the rail pads.…”

Section: Modeling Of the High-speed Train And Slab Trackmentioning

confidence: 99%

Saturated Ground Vibration Analysis Based on a Three-Dimensional Coupled Train-Track-Soil Interaction Model

Kaewunruen

2019

Applied Sciences

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A novel three-dimensional (3D) coupled train-track-soil interaction model is developed based on the multi-body simulation (MBS) principle and finite element modeling (FEM) theory using LS-DYNA. The novel model is capable of determining the highspeed effects of trains on track and foundation. The soils in this model are treated as saturated media. The wheel-rail dynamic interactions under the track irregularity are developed based on the Hertz contact theory. This model was validated by comparing its numerical results with experimental results obtained from field measurements and a good agreement was established. The one-layered saturated soil model is firstly developed to investigate the vibration responses of pore water pressures, effective and total stresses, and displacements of soils under different train speeds and soil moduli. The multi-layered soils with and without piles are then developed to highlight the influences of multi-layered soils and piles on the ground vibration responses. The effects of water on the train-track dynamic interactions are also presented. The original insight from this study provides a new and better understanding into saturated ground vibration responses in high-speed railway systems using slab tracks in practice. This insight will help track engineers to inspect, maintain, and improve soil conditions effectively, resulting in a seamless railway operation.

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“…Nowadays, high-speed railways have developed rapidly around the world, especially in China [1]. High-speed railways have proven to be one of the most significant technological advances in recent decades.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Vibration Characteristics of Unit-Plate Ballastless Track Systems Laid on Long-Span Bridges Using Full-Scale Test Rigs

Zheng

Sheng

Zhu

et al. 2020

Sensors

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In this work, we present a series of hammering tests on full-scale unit-plate ballastless tracks used for long-span bridges. There is no denying that it is a new attempt to pave ballastless tracks on high-speed railway long-span bridges; the related issues deserve to be studied, and especially the vibration characteristics. Hence, the vibration characteristics and transmission rules of the ballastless track with geotextile or rubber isolation layers are explored, and the vibration reduction effect of the rubber isolation layer is analyzed. The main conclusions are as follows: the isolation layers change vibration modes and transmission characteristics of ballastless tracks; the introduction of the rubber isolation layer makes the excited vibration frequency range of the ballastless track concentrated; and the vibrations of the ballastless track with the rubber isolation layers are stable. Moreover, the rubber isolation layer has an obvious attenuation effect on vibration transmission in ballastless track structures. When the vibration is transmitted from the rail to the bridge deck, the vibration level differences of the ballastless track with rubber isolation layers are 20 dB larger than that of the ballastless track with the geotextile isolation layers. The vibration attenuation rate of the rubber isolation layer is about ten times larger than that of geotextile isolation layer.

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Experimental study on dynamic performance of typical nonballasted track systems using a full-scale test rig

Cited by 31 publications

References 17 publications

Full-scale multi-functional test platform for investigating mechanical performance of track–subgrade systems of high-speed railways

Full-scale multi-functional test platform for investigating mechanical performance of track–subgrade systems of high-speed railways

Saturated Ground Vibration Analysis Based on a Three-Dimensional Coupled Train-Track-Soil Interaction Model

Experimental Study on Vibration Characteristics of Unit-Plate Ballastless Track Systems Laid on Long-Span Bridges Using Full-Scale Test Rigs

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