Influences of ballast degradation on railway track buckling

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Influences of ballast degradation on railway track buckling. / Ngamkhanong, Chayut; Kaewunruen, Sakdirat; Baniotopoulos, Charalampos.

In: Engineering Failure Analysis, Vol. 122, 105252, 04.2021.

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@article{c2e34c16536745808f3bb87cae68f155,
title = "Influences of ballast degradation on railway track buckling",
abstract = "Presently, railway track buckling, caused by extreme heat, is a serious issue that causes a huge loss of assets in railway systems. The increase in rail temperature can induce a compression force in the continuous welded rail (CWR) and this may cause track buckling when the compression force reaches the buckling strength. It is important to ensure the lateral stability of railway track in order to tackle the extreme temperature. However, in fact, railway track can be progressively degraded over time resulting in poorer track stability. This includes the larger lateral track misalignment and component deteriorations. This unprecedented study highlights 3D Finite Element Modelling (FEM) of ballasted railway tracks subjected to temperature change considering different ballast fouling conditions. The buckling analysis of ballasted railway tracks considering ballast fouling conditions has been investigated previously. This paper adopts the lateral resistance obtained from the previous single sleeper (tie) push test simulations to the lateral spring model. The influences of the boundary conditions and rail misalignment on the buckling temperature are also investigated. The results clearly show that the ballast fouling may increase the likelihood of track buckling even if the fouled ballast is accumulated at the bottom of the ballast layer. More importantly, the allowable temperature can be reduced up to 50% when the ballast is completely fouled. The results can be used to predict the buckling temperature and to inspect the conditions of ballast. The new findings highlight the buckling phenomena of interspersed railway tracks and help improve the inspection regime of ballast conditions especially in summer to encounter the extreme heat.",
keywords = "Ballast degradation, Ballast fouling, Progressive buckling, Railway track buckling, Snap-through buckling",
author = "Chayut Ngamkhanong and Sakdirat Kaewunruen and Charalampos Baniotopoulos",
note = "Funding Information: The authors are sincerely grateful to European Commission for the financial sponsorship of the H2020-MSCA-RISE Project No. 691135 “RISEN: Rail Infrastructure Systems Engineering Network,” which enables a global research network that tackles the grand challenge of railway infrastructure resilience and advanced sensing in extreme environments ( www.risen2rail.eu ) [49] . Some research work has been carried out by the first author during his RISEN secondment (visiting student) at the Department of Civil and Environmental Engineering, the University of Illinois at Urbana-Champaign, USA. The first author would like to express his sincere appreciation to Prof Erol Tutumluer and Prof Youssef M A Hashash from the University of Illinois at Urbana-Champaign for the valuable comments and support during his stay in the USA.",
year = "2021",
month = apr,
doi = "10.1016/j.engfailanal.2021.105252",
language = "English",
volume = "122",
journal = "Engineering Failure Analysis",
issn = "1350-6307",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Influences of ballast degradation on railway track buckling

AU - Ngamkhanong, Chayut

AU - Kaewunruen, Sakdirat

AU - Baniotopoulos, Charalampos

N1 - Funding Information: The authors are sincerely grateful to European Commission for the financial sponsorship of the H2020-MSCA-RISE Project No. 691135 “RISEN: Rail Infrastructure Systems Engineering Network,” which enables a global research network that tackles the grand challenge of railway infrastructure resilience and advanced sensing in extreme environments ( www.risen2rail.eu ) [49] . Some research work has been carried out by the first author during his RISEN secondment (visiting student) at the Department of Civil and Environmental Engineering, the University of Illinois at Urbana-Champaign, USA. The first author would like to express his sincere appreciation to Prof Erol Tutumluer and Prof Youssef M A Hashash from the University of Illinois at Urbana-Champaign for the valuable comments and support during his stay in the USA.

PY - 2021/4

Y1 - 2021/4

N2 - Presently, railway track buckling, caused by extreme heat, is a serious issue that causes a huge loss of assets in railway systems. The increase in rail temperature can induce a compression force in the continuous welded rail (CWR) and this may cause track buckling when the compression force reaches the buckling strength. It is important to ensure the lateral stability of railway track in order to tackle the extreme temperature. However, in fact, railway track can be progressively degraded over time resulting in poorer track stability. This includes the larger lateral track misalignment and component deteriorations. This unprecedented study highlights 3D Finite Element Modelling (FEM) of ballasted railway tracks subjected to temperature change considering different ballast fouling conditions. The buckling analysis of ballasted railway tracks considering ballast fouling conditions has been investigated previously. This paper adopts the lateral resistance obtained from the previous single sleeper (tie) push test simulations to the lateral spring model. The influences of the boundary conditions and rail misalignment on the buckling temperature are also investigated. The results clearly show that the ballast fouling may increase the likelihood of track buckling even if the fouled ballast is accumulated at the bottom of the ballast layer. More importantly, the allowable temperature can be reduced up to 50% when the ballast is completely fouled. The results can be used to predict the buckling temperature and to inspect the conditions of ballast. The new findings highlight the buckling phenomena of interspersed railway tracks and help improve the inspection regime of ballast conditions especially in summer to encounter the extreme heat.

AB - Presently, railway track buckling, caused by extreme heat, is a serious issue that causes a huge loss of assets in railway systems. The increase in rail temperature can induce a compression force in the continuous welded rail (CWR) and this may cause track buckling when the compression force reaches the buckling strength. It is important to ensure the lateral stability of railway track in order to tackle the extreme temperature. However, in fact, railway track can be progressively degraded over time resulting in poorer track stability. This includes the larger lateral track misalignment and component deteriorations. This unprecedented study highlights 3D Finite Element Modelling (FEM) of ballasted railway tracks subjected to temperature change considering different ballast fouling conditions. The buckling analysis of ballasted railway tracks considering ballast fouling conditions has been investigated previously. This paper adopts the lateral resistance obtained from the previous single sleeper (tie) push test simulations to the lateral spring model. The influences of the boundary conditions and rail misalignment on the buckling temperature are also investigated. The results clearly show that the ballast fouling may increase the likelihood of track buckling even if the fouled ballast is accumulated at the bottom of the ballast layer. More importantly, the allowable temperature can be reduced up to 50% when the ballast is completely fouled. The results can be used to predict the buckling temperature and to inspect the conditions of ballast. The new findings highlight the buckling phenomena of interspersed railway tracks and help improve the inspection regime of ballast conditions especially in summer to encounter the extreme heat.

KW - Ballast degradation

KW - Ballast fouling

KW - Progressive buckling

KW - Railway track buckling

KW - Snap-through buckling

UR - http://www.scopus.com/inward/record.url?scp=85100080473&partnerID=8YFLogxK

U2 - 10.1016/j.engfailanal.2021.105252

DO - 10.1016/j.engfailanal.2021.105252

M3 - Article

VL - 122

JO - Engineering Failure Analysis

JF - Engineering Failure Analysis

SN - 1350-6307

M1 - 105252

ER -