Assessment of Aseismic Performance of Ballasted Track with Large-scale Shaking Table Tests

Nakamura, Takahisa; Sekine, Etsuo; Shirae, Yusuke

doi:10.2219/rtriqr.52.156

Cited by 15 publications

(7 citation statements)

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“…When discussing the seismic response of CWR on bridges, one of the important tasks is the reasonable selection of seismic waves and three methods are widely adopted as follows [16,19]:…”

Section: Loading Methodsmentioning

confidence: 99%

“…Ballast beds are packed granular structures, which are subject to structural change under seismic loading due to interaction between the granules, and part of the granules will flow and redistribute [16], causing a strong nonlinearity and uncertainty of longitudinal resistance and influences the rail stability and strained state etc. Existing research findings on longitudinal track-bridge interaction models used under uniform seismic excitation, have failed to fully account for the damage and repacking of granular ballast beds which occur, and its influence on key parameters.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Shaking table testing and numerical modeling of continuous welded ballast track on bridges under longitudinal seismic loading

Wang¹,

Wei²,

Chen³

et al. 2017

J. vibroeng.

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In order to confirm the validity of the ideal elasto-plastic resistance model applied to the ballast track under seismic loading, this paper studies the seismic response of continuous welded ballast track on bridges through the shaking table test and presents a process of updating the model based on the test results. The results indicate that the track constraint can improve the low order natural frequency of bridges significantly, and reduce the displacement response of the bridge. When ballast beds are effectively in a dynamic reciprocating state while under seismic loading, a structural change between the granules will occur, wherein some will flow and redistribute. The dynamic hysteretic change of the ballast longitudinal resistance is complex and quite different from that of the ideal elasto-plastic hysteretic route, and the ballast longitudinal resistance performance degenerates. If ballast longitudinal resistance is assumed to be ideal elastic-plastic resistance, the actual beam displacement response will be underestimated and the calculated rail seismic force will be greater than the test result. Moreover, the equivalent stiffness coefficient and damping coefficient of the ballast dynamic resistance characteristics could be obtained by model updating, and the simulation results coincide well with the test results.

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“…When discussing the seismic response of CWR on bridges, one of the important tasks is the reasonable selection of seismic waves and three methods are widely adopted as follows [16,19]:…”

Section: Loading Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Shaking table testing and numerical modeling of continuous welded ballast track on bridges under longitudinal seismic loading

Wang¹,

Wei²,

Chen³

et al. 2017

J. vibroeng.

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show abstract

“…Figure 5 shows the analysis results in comparison with the results of excitation test [2] conducted on a full-scale ballasted track. Results confirmed by the analysis method mostly agreed with the test results, despite limited test conditions, when the ballast resistance characteristics observed during excitation were appropriately considered.…”

Section: Numerical Analysis Methodsmentioning

confidence: 99%

“…Based on the study results, various track side countermeasures were implemented particularly to ballasted track. Quantitative confirmation of the effectiveness of these various measures, to improve lateral ballast resistance (which greatly influences the deformation behavior of ballasted track during earthquakes), was obtained through shaking table tests using full-size ballasted tracks [2]. Since then a new countermeasure method offering greater cost-effectiveness than conventional ballast curbs has been developed, with proven deformation suppression effect and workability [3].…”

Section: Introductionmentioning

confidence: 99%

Deformation Behavior of Ballasted Track during Earthquakes

et al. 2013

Self Cite

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“…At that point the operation of train traffic is no longer possible [2]. The influence of seismic load on the ballast bed was tested in [8,9] using a shaking table. The shape of ballast bed at a frequency of 1 Hz, for accelerations ranging from 5 to 8 m/s 2 , is shown in Figure 2.…”

Section: Earthquake Effect On Railway Infrastructurementioning

confidence: 99%

Railway infrastructure in earthquake affected areas

Lakušić¹,

Haladin²,

Vranešić³

2020

JCE

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In the case o seismic impact on rail infrastructure, even small deformations or damage to track structure can compromise safe operation of rail traffic. Damage can affect track substructure or permanent way of the track, but also the electrification system and safety-signalling devices. Ballast prism will suffer damage in case of greater intensity earthquakes, resulting in the reduction of lateral and longitudinal resistance of track structure. Earthquake action may also cause derailment of moving rail vehicles. Operation of rail vehicles also causes certain levels of vibrations, and so an analysis of subsequent effects of rail traffic.

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Assessment of Aseismic Performance of Ballasted Track with Large-scale Shaking Table Tests

Cited by 15 publications

References 0 publications

Shaking table testing and numerical modeling of continuous welded ballast track on bridges under longitudinal seismic loading

Shaking table testing and numerical modeling of continuous welded ballast track on bridges under longitudinal seismic loading

Deformation Behavior of Ballasted Track during Earthquakes

Railway infrastructure in earthquake affected areas

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