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
Sujets:	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
Accès en ligne:	https://doaj.org/article/7ae6805b120b49beab9b7353c40202b6
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id	oai:doaj.org-article:7ae6805b120b49beab9b7353c40202b6
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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
_version_	1718435372682182656

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

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