Impact damage mechanism and mitigation by ballast bonding at railway bridge ends

Research output: Contribution to journalArticlepeer-review

Standard

Impact damage mechanism and mitigation by ballast bonding at railway bridge ends. / Kaewunruen, Sakdirat.

In: The International Journal of Railway Technology, Vol. 3, No. 4, 2014, p. 1-22.

Research output: Contribution to journalArticlepeer-review

Harvard

APA

Vancouver

Author

Bibtex

@article{2e53523fd4b84c41a17b104bde49f9c5,
title = "Impact damage mechanism and mitigation by ballast bonding at railway bridge ends",
abstract = "Accelerated deterioration of railway bridge approaches often induces downtime or restricted railway operation; and importantly causes more frequent maintenance, which is costly and time-consuming. Such deterioration is believed to occur because of high dynamic impact loading from the difference of stiffness between railway track and bridge, and poor condition of track support at the bridge ends. The abrupt change in track stiffness often causes accelerated degradation of track geometry and components and poor ride quality, demanding higher maintenance. On this ground, there are a number of improvement programs that have been implemented in order to provide a transition to smooth the stiffness interface. In principle, the transitions were designed to either:• Provide a gradual increase in the stiffness of ballasted track to match that of the stiffer track (stiffness ramping); or • Equalise the stiffness and rail deflection, usually by controlling the resilience of rails on the stiffer track, or by adding more resiliency to the stiffer track.This paper presents the ballast breakage mechanism at railway bridge ends, together with a field trial and the measured dynamic behaviour of the bridge ends improved by using ballast glue/bond method. This field study demonstrates an application of ballast glue/bond to improve the smoothness of stiffness along the ballasted track at bridge ends. The method appears to be useful for brown-field maintenance where adjacent aged infrastructure exists. The ballast glue/bond could reinforce the ballasted track stiffness through the aggregate adhesion whilst the drainage property of ballast in any existing track is not undermined. The field trail was conducted at a railway bridge in New South Wales, Australia. The results show that the ballast glue/bond suppresses vibrations over broad frequency ranges but excites the track resonances at low frequency range (0-10 Hz). After one year revenue services, the field survey investigation indicates the stability of track geometry at the bridge end systems. A discounted financial gain from the trial is also demonstrated as a case study.",
keywords = "railway bridge end, railway maintenance, bridge approach, ballast glue, ballast bond, dynamic responses, vibration suppression, track-bridge systems",
author = "Sakdirat Kaewunruen",
year = "2014",
doi = "10.4203/ijrt.3.4.1",
language = "English",
volume = "3",
pages = "1--22",
journal = "The International Journal of Railway Technology",
issn = "2049-5358",
number = "4",

}

RIS

TY - JOUR

T1 - Impact damage mechanism and mitigation by ballast bonding at railway bridge ends

AU - Kaewunruen, Sakdirat

PY - 2014

Y1 - 2014

N2 - Accelerated deterioration of railway bridge approaches often induces downtime or restricted railway operation; and importantly causes more frequent maintenance, which is costly and time-consuming. Such deterioration is believed to occur because of high dynamic impact loading from the difference of stiffness between railway track and bridge, and poor condition of track support at the bridge ends. The abrupt change in track stiffness often causes accelerated degradation of track geometry and components and poor ride quality, demanding higher maintenance. On this ground, there are a number of improvement programs that have been implemented in order to provide a transition to smooth the stiffness interface. In principle, the transitions were designed to either:• Provide a gradual increase in the stiffness of ballasted track to match that of the stiffer track (stiffness ramping); or • Equalise the stiffness and rail deflection, usually by controlling the resilience of rails on the stiffer track, or by adding more resiliency to the stiffer track.This paper presents the ballast breakage mechanism at railway bridge ends, together with a field trial and the measured dynamic behaviour of the bridge ends improved by using ballast glue/bond method. This field study demonstrates an application of ballast glue/bond to improve the smoothness of stiffness along the ballasted track at bridge ends. The method appears to be useful for brown-field maintenance where adjacent aged infrastructure exists. The ballast glue/bond could reinforce the ballasted track stiffness through the aggregate adhesion whilst the drainage property of ballast in any existing track is not undermined. The field trail was conducted at a railway bridge in New South Wales, Australia. The results show that the ballast glue/bond suppresses vibrations over broad frequency ranges but excites the track resonances at low frequency range (0-10 Hz). After one year revenue services, the field survey investigation indicates the stability of track geometry at the bridge end systems. A discounted financial gain from the trial is also demonstrated as a case study.

AB - Accelerated deterioration of railway bridge approaches often induces downtime or restricted railway operation; and importantly causes more frequent maintenance, which is costly and time-consuming. Such deterioration is believed to occur because of high dynamic impact loading from the difference of stiffness between railway track and bridge, and poor condition of track support at the bridge ends. The abrupt change in track stiffness often causes accelerated degradation of track geometry and components and poor ride quality, demanding higher maintenance. On this ground, there are a number of improvement programs that have been implemented in order to provide a transition to smooth the stiffness interface. In principle, the transitions were designed to either:• Provide a gradual increase in the stiffness of ballasted track to match that of the stiffer track (stiffness ramping); or • Equalise the stiffness and rail deflection, usually by controlling the resilience of rails on the stiffer track, or by adding more resiliency to the stiffer track.This paper presents the ballast breakage mechanism at railway bridge ends, together with a field trial and the measured dynamic behaviour of the bridge ends improved by using ballast glue/bond method. This field study demonstrates an application of ballast glue/bond to improve the smoothness of stiffness along the ballasted track at bridge ends. The method appears to be useful for brown-field maintenance where adjacent aged infrastructure exists. The ballast glue/bond could reinforce the ballasted track stiffness through the aggregate adhesion whilst the drainage property of ballast in any existing track is not undermined. The field trail was conducted at a railway bridge in New South Wales, Australia. The results show that the ballast glue/bond suppresses vibrations over broad frequency ranges but excites the track resonances at low frequency range (0-10 Hz). After one year revenue services, the field survey investigation indicates the stability of track geometry at the bridge end systems. A discounted financial gain from the trial is also demonstrated as a case study.

KW - railway bridge end

KW - railway maintenance

KW - bridge approach

KW - ballast glue

KW - ballast bond

KW - dynamic responses

KW - vibration suppression

KW - track-bridge systems

U2 - 10.4203/ijrt.3.4.1

DO - 10.4203/ijrt.3.4.1

M3 - Article

VL - 3

SP - 1

EP - 22

JO - The International Journal of Railway Technology

JF - The International Journal of Railway Technology

SN - 2049-5358

IS - 4

ER -