Transverse Cracking of Concrete Base Plate in CRTS III Ballastless Track Structure: Effects of Environmental Boundary Conditions

The cast-in-place concrete base plate is a main member of the China Railway Track System (CRTS) III ballastless track structure that is prone to generating early transverse cracking. Such cracks can dramatically affect the performance and service life of the railway track structure. This study inves...

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Auteurs principaux: Weiqiang Guo, Xin Huang, Lijun Zhao, Ya Wei
Format: article
Langue:EN
Publié: MDPI AG 2021
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spelling oai:doaj.org-article:7ae6805b120b49beab9b7353c40202b62021-11-11T15:23:59ZTransverse Cracking of Concrete Base Plate in CRTS III Ballastless Track Structure: Effects of Environmental Boundary Conditions10.3390/app1121104002076-3417https://doaj.org/article/7ae6805b120b49beab9b7353c40202b62021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10400https://doaj.org/toc/2076-3417The cast-in-place concrete base plate is a main member of the China Railway Track System (CRTS) III ballastless track structure that is prone to generating early transverse cracking. Such cracks can dramatically affect the performance and service life of the railway track structure. This study investigated the influence of temperature and moisture boundary conditions on early cracking behavior of the CRTS III base plate by using approaches of both in situ measurements and numerical modelling. In-site measurements of strain and temperature were made in four test series of CRTS III base plates under the same natural environmental condition but cured with different regimes, and a total of 96 measuring positions were monitored for up to 150 days. The results showed that the strain magnitude and distribution in the field base plate, the initial time at cracking, and the observed cracking pattern varied significantly between the different test series. In order to understand the mechanisms that create these transverse cracks and to provide guidelines for the current curing strategy during construction, the characteristics of temperature-induced and moisture-induced stresses were analyzed by using 3D numerical modelling and by considering early-age concrete creep properties, meteorological factors, and the influence from environmental boundary conditions. The calculated results revealed that early-age transverse cracking in CRTS III base plate depends more on drying shrinkage stress than temperature stress. By conducting this study, we expect to provide guidance for reducing or eliminating early cracks of CRTS III concrete base plate.Weiqiang GuoXin HuangLijun ZhaoYa WeiMDPI AGarticleconcrete plateCRTS III ballastless tracktransverse crackingenvironmental boundary conditionin-site strain measurementTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10400, p 10400 (2021)
institution DOAJ
collection DOAJ
language EN
topic concrete plate
CRTS III ballastless track
transverse cracking
environmental boundary condition
in-site strain measurement
Technology
T
Engineering (General). Civil engineering (General)
TA1-2040
Biology (General)
QH301-705.5
Physics
QC1-999
Chemistry
QD1-999
spellingShingle concrete plate
CRTS III ballastless track
transverse cracking
environmental boundary condition
in-site strain measurement
Technology
T
Engineering (General). Civil engineering (General)
TA1-2040
Biology (General)
QH301-705.5
Physics
QC1-999
Chemistry
QD1-999
Weiqiang Guo
Xin Huang
Lijun Zhao
Ya Wei
Transverse Cracking of Concrete Base Plate in CRTS III Ballastless Track Structure: Effects of Environmental Boundary Conditions
description The cast-in-place concrete base plate is a main member of the China Railway Track System (CRTS) III ballastless track structure that is prone to generating early transverse cracking. Such cracks can dramatically affect the performance and service life of the railway track structure. This study investigated the influence of temperature and moisture boundary conditions on early cracking behavior of the CRTS III base plate by using approaches of both in situ measurements and numerical modelling. In-site measurements of strain and temperature were made in four test series of CRTS III base plates under the same natural environmental condition but cured with different regimes, and a total of 96 measuring positions were monitored for up to 150 days. The results showed that the strain magnitude and distribution in the field base plate, the initial time at cracking, and the observed cracking pattern varied significantly between the different test series. In order to understand the mechanisms that create these transverse cracks and to provide guidelines for the current curing strategy during construction, the characteristics of temperature-induced and moisture-induced stresses were analyzed by using 3D numerical modelling and by considering early-age concrete creep properties, meteorological factors, and the influence from environmental boundary conditions. The calculated results revealed that early-age transverse cracking in CRTS III base plate depends more on drying shrinkage stress than temperature stress. By conducting this study, we expect to provide guidance for reducing or eliminating early cracks of CRTS III concrete base plate.
format article
author Weiqiang Guo
Xin Huang
Lijun Zhao
Ya Wei
author_facet Weiqiang Guo
Xin Huang
Lijun Zhao
Ya Wei
author_sort Weiqiang Guo
title Transverse Cracking of Concrete Base Plate in CRTS III Ballastless Track Structure: Effects of Environmental Boundary Conditions
title_short Transverse Cracking of Concrete Base Plate in CRTS III Ballastless Track Structure: Effects of Environmental Boundary Conditions
title_full Transverse Cracking of Concrete Base Plate in CRTS III Ballastless Track Structure: Effects of Environmental Boundary Conditions
title_fullStr Transverse Cracking of Concrete Base Plate in CRTS III Ballastless Track Structure: Effects of Environmental Boundary Conditions
title_full_unstemmed Transverse Cracking of Concrete Base Plate in CRTS III Ballastless Track Structure: Effects of Environmental Boundary Conditions
title_sort transverse cracking of concrete base plate in crts iii ballastless track structure: effects of environmental boundary conditions
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/7ae6805b120b49beab9b7353c40202b6
work_keys_str_mv AT weiqiangguo transversecrackingofconcretebaseplateincrtsiiiballastlesstrackstructureeffectsofenvironmentalboundaryconditions
AT xinhuang transversecrackingofconcretebaseplateincrtsiiiballastlesstrackstructureeffectsofenvironmentalboundaryconditions
AT lijunzhao transversecrackingofconcretebaseplateincrtsiiiballastlesstrackstructureeffectsofenvironmentalboundaryconditions
AT yawei transversecrackingofconcretebaseplateincrtsiiiballastlesstrackstructureeffectsofenvironmentalboundaryconditions
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