Numerical Investigation of HMA Effect on Dynamic Behavoiur of Railway Track Transition Zone

There are many structures along the railway tracks such bridges and culverts. The track vertical stiffness suddenly changes where the track passes over these structures. Therefore, these locations are called transition zones. Sudden track stiffness changes in these locations can lead to the asymmetr...

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Autores principales:	Alireza Gharighoran, Hamidreza Heydari-Noghabi, Ali Moeini
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2018
Materias:	railway track transition zone hot mix asphalt (hma) layer railway ballasted tracks culvert finite element modelling Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/4a365ab3907b466eb6d7a79ffb83f637
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id	oai:doaj.org-article:4a365ab3907b466eb6d7a79ffb83f637
record_format	dspace
spelling	oai:doaj.org-article:4a365ab3907b466eb6d7a79ffb83f6372021-11-08T15:48:11ZNumerical Investigation of HMA Effect on Dynamic Behavoiur of Railway Track Transition Zone2476-39772538-261610.22065/jsce.2017.80167.1116https://doaj.org/article/4a365ab3907b466eb6d7a79ffb83f6372018-09-01T00:00:00Zhttps://www.jsce.ir/article_48106_67f3efdd06f58e8245b1271eedb7731b.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616There are many structures along the railway tracks such bridges and culverts. The track vertical stiffness suddenly changes where the track passes over these structures. Therefore, these locations are called transition zones. Sudden track stiffness changes in these locations can lead to the asymmetric deformations, railway roughness, damage to the components of superstructure system. Studies shown that changing of the track stiffness along the railway lines is one of the main sources of tracks geometric damages. One of the most common places that the railway track stiffness changed along the railway lines are the culverts and bridges. The vertical stiffness change in these area causes the asymmetric deformations, rail roughness, damage of the components and as a result increasing the maintenance costs. One of the methods to solve the above problems is used to the hot mix asphalt (HMA) layer in adjacent of the culverts and bridges. In the present study, the behaviour of railway track in adjacent of culverts with HMA layer has been evaluated. For this purpose, a 3D finite element model of railway track culvert with HMA layer was built, and then different sensitivities on the geometric dimensions of HMA layer (including thickness and length) were analysed. Also based on analyse with exist a optimized layer of hot mixed asphalt around bridges structures the rail vertical displacement, ballasted layer vertical displacement and the normal stress in the middle of the subsgrade layer decreased approximately 19%, 22% and 36% respectively.Alireza GharighoranHamidreza Heydari-NoghabiAli MoeiniIranian Society of Structrual Engineering (ISSE)articlerailway track transition zonehot mix asphalt (hma) layerrailway ballasted tracksculvertfinite element modellingBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 5, Iss 2, Pp 134-145 (2018)
institution	DOAJ
collection	DOAJ
language	FA
topic	railway track transition zone hot mix asphalt (hma) layer railway ballasted tracks culvert finite element modelling Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	railway track transition zone hot mix asphalt (hma) layer railway ballasted tracks culvert finite element modelling Bridge engineering TG1-470 Building construction TH1-9745 Alireza Gharighoran Hamidreza Heydari-Noghabi Ali Moeini Numerical Investigation of HMA Effect on Dynamic Behavoiur of Railway Track Transition Zone
description	There are many structures along the railway tracks such bridges and culverts. The track vertical stiffness suddenly changes where the track passes over these structures. Therefore, these locations are called transition zones. Sudden track stiffness changes in these locations can lead to the asymmetric deformations, railway roughness, damage to the components of superstructure system. Studies shown that changing of the track stiffness along the railway lines is one of the main sources of tracks geometric damages. One of the most common places that the railway track stiffness changed along the railway lines are the culverts and bridges. The vertical stiffness change in these area causes the asymmetric deformations, rail roughness, damage of the components and as a result increasing the maintenance costs. One of the methods to solve the above problems is used to the hot mix asphalt (HMA) layer in adjacent of the culverts and bridges. In the present study, the behaviour of railway track in adjacent of culverts with HMA layer has been evaluated. For this purpose, a 3D finite element model of railway track culvert with HMA layer was built, and then different sensitivities on the geometric dimensions of HMA layer (including thickness and length) were analysed. Also based on analyse with exist a optimized layer of hot mixed asphalt around bridges structures the rail vertical displacement, ballasted layer vertical displacement and the normal stress in the middle of the subsgrade layer decreased approximately 19%, 22% and 36% respectively.
format	article
author	Alireza Gharighoran Hamidreza Heydari-Noghabi Ali Moeini
author_facet	Alireza Gharighoran Hamidreza Heydari-Noghabi Ali Moeini
author_sort	Alireza Gharighoran
title	Numerical Investigation of HMA Effect on Dynamic Behavoiur of Railway Track Transition Zone
title_short	Numerical Investigation of HMA Effect on Dynamic Behavoiur of Railway Track Transition Zone
title_full	Numerical Investigation of HMA Effect on Dynamic Behavoiur of Railway Track Transition Zone
title_fullStr	Numerical Investigation of HMA Effect on Dynamic Behavoiur of Railway Track Transition Zone
title_full_unstemmed	Numerical Investigation of HMA Effect on Dynamic Behavoiur of Railway Track Transition Zone
title_sort	numerical investigation of hma effect on dynamic behavoiur of railway track transition zone
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2018
url	https://doaj.org/article/4a365ab3907b466eb6d7a79ffb83f637
work_keys_str_mv	AT alirezagharighoran numericalinvestigationofhmaeffectondynamicbehavoiurofrailwaytracktransitionzone AT hamidrezaheydarinoghabi numericalinvestigationofhmaeffectondynamicbehavoiurofrailwaytracktransitionzone AT alimoeini numericalinvestigationofhmaeffectondynamicbehavoiurofrailwaytracktransitionzone
_version_	1718441656221433856

Numerical Investigation of HMA Effect on Dynamic Behavoiur of Railway Track Transition Zone

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