Influence of time-dependent material degradation on life cycle serviceability of interspersed railway tracks due to moving train loads

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Influence of time-dependent material degradation on life cycle serviceability of interspersed railway tracks due to moving train loads. / Kaewunruen, Sakdirat; Ngamkhanong, Chayut; Ng, Jipong.

In: Engineering Structures, Vol. 199, 109625, 15.11.2019.

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@article{5089f823e0674b73b03df9e17487953a,
title = "Influence of time-dependent material degradation on life cycle serviceability of interspersed railway tracks due to moving train loads",
abstract = "Presently, timber-sleepered tracks are still being adopted in railway networks transporting goods and passengers. However, the deterioration of timber sleepers is evident after years of service due to natural decay; and it is difficult to seek cost-effective hardwood sleepers to replace the aging sleepers. An impermanent “interspersed” approach is an alternative method used to substitute rotten timbers with concrete sleepers. Although the interspersed tracks offer a cost-effective short-term solution for certain track classes, there are some drawbacks to this practice, since the interspersed track has inconsistent stiffness problems, and the different track decay rate can cause uneven settlement and foundation failure, which can lead to significant track deterioration over time. The emphasis of this study is placed on the long-term behaviour of interspersed track components under repeated train loading. Interspersed track models in three-dimensional space have been developed and validated using a finite element method. The effects of deteriorated railway components (timber, rail pads, ballast) are taken into account to examine the dynamic performance of the interspersed tracks under moving train loads. This study will help rail track engineers better understand the time-dependent behaviour of interspersed tracks, enable a truly predictive track maintenance and improve the reliability of infrastructure asset maintenance and life cycle management.",
keywords = "Interspersed tracks, Timber sleeper, Concrete sleeper, Dynamic response, Nonlinear transient analysis, Tensionless support, Time-dependent behaviour, Material deterioration",
author = "Sakdirat Kaewunruen and Chayut Ngamkhanong and Jipong Ng",
year = "2019",
month = nov,
day = "15",
doi = "10.1016/j.engstruct.2019.109625",
language = "English",
volume = "199",
journal = "Engineering Structures",
issn = "0141-0296",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Influence of time-dependent material degradation on life cycle serviceability of interspersed railway tracks due to moving train loads

AU - Kaewunruen, Sakdirat

AU - Ngamkhanong, Chayut

AU - Ng, Jipong

PY - 2019/11/15

Y1 - 2019/11/15

N2 - Presently, timber-sleepered tracks are still being adopted in railway networks transporting goods and passengers. However, the deterioration of timber sleepers is evident after years of service due to natural decay; and it is difficult to seek cost-effective hardwood sleepers to replace the aging sleepers. An impermanent “interspersed” approach is an alternative method used to substitute rotten timbers with concrete sleepers. Although the interspersed tracks offer a cost-effective short-term solution for certain track classes, there are some drawbacks to this practice, since the interspersed track has inconsistent stiffness problems, and the different track decay rate can cause uneven settlement and foundation failure, which can lead to significant track deterioration over time. The emphasis of this study is placed on the long-term behaviour of interspersed track components under repeated train loading. Interspersed track models in three-dimensional space have been developed and validated using a finite element method. The effects of deteriorated railway components (timber, rail pads, ballast) are taken into account to examine the dynamic performance of the interspersed tracks under moving train loads. This study will help rail track engineers better understand the time-dependent behaviour of interspersed tracks, enable a truly predictive track maintenance and improve the reliability of infrastructure asset maintenance and life cycle management.

AB - Presently, timber-sleepered tracks are still being adopted in railway networks transporting goods and passengers. However, the deterioration of timber sleepers is evident after years of service due to natural decay; and it is difficult to seek cost-effective hardwood sleepers to replace the aging sleepers. An impermanent “interspersed” approach is an alternative method used to substitute rotten timbers with concrete sleepers. Although the interspersed tracks offer a cost-effective short-term solution for certain track classes, there are some drawbacks to this practice, since the interspersed track has inconsistent stiffness problems, and the different track decay rate can cause uneven settlement and foundation failure, which can lead to significant track deterioration over time. The emphasis of this study is placed on the long-term behaviour of interspersed track components under repeated train loading. Interspersed track models in three-dimensional space have been developed and validated using a finite element method. The effects of deteriorated railway components (timber, rail pads, ballast) are taken into account to examine the dynamic performance of the interspersed tracks under moving train loads. This study will help rail track engineers better understand the time-dependent behaviour of interspersed tracks, enable a truly predictive track maintenance and improve the reliability of infrastructure asset maintenance and life cycle management.

KW - Interspersed tracks

KW - Timber sleeper

KW - Concrete sleeper

KW - Dynamic response

KW - Nonlinear transient analysis

KW - Tensionless support

KW - Time-dependent behaviour

KW - Material deterioration

U2 - 10.1016/j.engstruct.2019.109625

DO - 10.1016/j.engstruct.2019.109625

M3 - Article

VL - 199

JO - Engineering Structures

JF - Engineering Structures

SN - 0141-0296

M1 - 109625

ER -