Mapping Relation between Rail and Bridge Deformation Considering Nonlinear Contact of Interlayer

This paper examines the effect of structural deformation on the unit slab-type ballastless track structure of high-speed railway. The principle of stationary potential energy was used to map the relation between girder vertical deformation and rail deformation considering the effect of subgrade boun...

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Autores principales:	Leixin Nie, Lizhong Jiang, Wangbao Zhou, Yulin Feng
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	bridge of high-speed railway unit slab ballastless track nonlinear contact of interlayer mapping relationship rail deformation principle of stationary potential energy Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/9d6220d8ffe84112acb265e26df13e22
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id	oai:doaj.org-article:9d6220d8ffe84112acb265e26df13e22
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spelling	oai:doaj.org-article:9d6220d8ffe84112acb265e26df13e222021-11-11T18:10:42ZMapping Relation between Rail and Bridge Deformation Considering Nonlinear Contact of Interlayer10.3390/ma142166531996-1944https://doaj.org/article/9d6220d8ffe84112acb265e26df13e222021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6653https://doaj.org/toc/1996-1944This paper examines the effect of structural deformation on the unit slab-type ballastless track structure of high-speed railway. The principle of stationary potential energy was used to map the relation between girder vertical deformation and rail deformation considering the effect of subgrade boundary conditions and the nonlinear contact of interlayer. The theoretical model was verified by comparing with the finite element analysis and experimental results. The theoretical model was used to analyze the effects of several key parameters on the rail deformation, such as vertical deformation amplitude, elastic modulus of the mortar layer, and vertical stiffness of the fasteners. The results show that the track slabs suffered significant disengagement, which makes the deformation of the track structure at the position of the beam joint tend to be gentle when nonlinear contact between the mortar layer and the track slabs was considered. The track slabs disengagement mainly occurs near the beam joints (the side of the deformed beam). As the deflection amplitude of the girder increases, the track deformation, the fastener forces and the disengagement length of the track slabs are obviously nonlinear. When the vertical stiffness of the fastener and/or the elastic modulus of the mortar layer increase, the fastener force and the track plate disengagement length increase monotonically and nonlinearly, which will adversely affect the life and safety of the track structure.Leixin NieLizhong JiangWangbao ZhouYulin FengMDPI AGarticlebridge of high-speed railwayunit slab ballastless tracknonlinear contact of interlayermapping relationshiprail deformationprinciple of stationary potential energyTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6653, p 6653 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bridge of high-speed railway unit slab ballastless track nonlinear contact of interlayer mapping relationship rail deformation principle of stationary potential energy Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	bridge of high-speed railway unit slab ballastless track nonlinear contact of interlayer mapping relationship rail deformation principle of stationary potential energy Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Leixin Nie Lizhong Jiang Wangbao Zhou Yulin Feng Mapping Relation between Rail and Bridge Deformation Considering Nonlinear Contact of Interlayer
description	This paper examines the effect of structural deformation on the unit slab-type ballastless track structure of high-speed railway. The principle of stationary potential energy was used to map the relation between girder vertical deformation and rail deformation considering the effect of subgrade boundary conditions and the nonlinear contact of interlayer. The theoretical model was verified by comparing with the finite element analysis and experimental results. The theoretical model was used to analyze the effects of several key parameters on the rail deformation, such as vertical deformation amplitude, elastic modulus of the mortar layer, and vertical stiffness of the fasteners. The results show that the track slabs suffered significant disengagement, which makes the deformation of the track structure at the position of the beam joint tend to be gentle when nonlinear contact between the mortar layer and the track slabs was considered. The track slabs disengagement mainly occurs near the beam joints (the side of the deformed beam). As the deflection amplitude of the girder increases, the track deformation, the fastener forces and the disengagement length of the track slabs are obviously nonlinear. When the vertical stiffness of the fastener and/or the elastic modulus of the mortar layer increase, the fastener force and the track plate disengagement length increase monotonically and nonlinearly, which will adversely affect the life and safety of the track structure.
format	article
author	Leixin Nie Lizhong Jiang Wangbao Zhou Yulin Feng
author_facet	Leixin Nie Lizhong Jiang Wangbao Zhou Yulin Feng
author_sort	Leixin Nie
title	Mapping Relation between Rail and Bridge Deformation Considering Nonlinear Contact of Interlayer
title_short	Mapping Relation between Rail and Bridge Deformation Considering Nonlinear Contact of Interlayer
title_full	Mapping Relation between Rail and Bridge Deformation Considering Nonlinear Contact of Interlayer
title_fullStr	Mapping Relation between Rail and Bridge Deformation Considering Nonlinear Contact of Interlayer
title_full_unstemmed	Mapping Relation between Rail and Bridge Deformation Considering Nonlinear Contact of Interlayer
title_sort	mapping relation between rail and bridge deformation considering nonlinear contact of interlayer
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9d6220d8ffe84112acb265e26df13e22
work_keys_str_mv	AT leixinnie mappingrelationbetweenrailandbridgedeformationconsideringnonlinearcontactofinterlayer AT lizhongjiang mappingrelationbetweenrailandbridgedeformationconsideringnonlinearcontactofinterlayer AT wangbaozhou mappingrelationbetweenrailandbridgedeformationconsideringnonlinearcontactofinterlayer AT yulinfeng mappingrelationbetweenrailandbridgedeformationconsideringnonlinearcontactofinterlayer
_version_	1718431901730996224

Mapping Relation between Rail and Bridge Deformation Considering Nonlinear Contact of Interlayer

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