Výsledky vyhledávání - "J. N. Varandas"

Akademický článek

Investigating the Influence of Auxiliary Rails on Dynamic Behavior of Railway Transition Zone by a 3D Train-Track Interaction Model

Autor: H. Heydari-Noghabi, J. N. Varandas, M. Esmaeili, J. Zakeri

Publikováno v: Latin American Journal of Solids and Structures, Vol 14, Iss 11, Pp 2000-2018

Abstract Abrupt track vertical stiffness variations along railway tracks can lead to increased dynamic loads, asymmetric deformations, damaged track components, and consequently, increased maintenance costs. The junction of slab track and ballasted t

Externí odkaz: https://doaj.org/article/6df7de832005408f90b2bd5651b89a2a

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Short soil–binder columns in railway track reinforcement: three–dimensional numerical studies considering the train–track interaction

Autor: André Paixão, J. N. Varandas, André Francisco, Eduardo Fortunato

Publikováno v: Computers and Geotechnics. 98:8-16

The authors present a numerical study on railway track subgrade reinforcement using short soil-binder columns through injection, below the ballast layer. A 3D FEM program developed in MATLAB that considers the dynamic train–track interaction and th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::49a4023ff65d394977d34c658cb6a664
https://doi.org/10.1016/j.compgeo.2018.02.001

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Towards network assessment of permanent railway track deformation

Autor: J. N. Varandas, Bruno Zuada Coelho, Marc P. Hijma, Arjen Zoeteman

Publikováno v: Transportation Geotechnics. 29:100578

The permanent railway track deformation caused by regular train traffic is important for infrastructure managers and railway contractors, as it determines the railway track quality. Although several successful approaches have been made to address the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::799583d627defa6d3f1227c661bee582
https://doi.org/10.1016/j.trgeo.2021.100578

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A study on the dynamic train-track interaction over cut-fill transitions on buried culverts

Autor: J. N. Varandas, Eduardo Fortunato, André Paixão

Publikováno v: Computers & Structures. 189:49-61

Sudden changes in the structural and geotechnical properties of railway tracks along its course are normally associated with subgrade stiffness transitions, differential settlements and, ultimately, hanging sleepers that reduce the performance of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::de6559a3923a66b5ab792ab27c2abfb7
https://doi.org/10.1016/j.compstruc.2017.04.017

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Field study using additional rails and an approach slab as a transition zone from slab track to the ballasted track

Autor: J. N. Varandas, Hamidreza Heydari-Noghabi, Morteza Esmaeili, Jabbar Ali Zakeri

Publikováno v: Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 232:970-978

An abrupt change in the stiffness of railway tracks at the junction between slab track and ballasted track causes increased dynamic loads, asymmetric settlements, damage of track components, and, consequently, increased maintenance costs. Due to this

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cd945119d63a31ef9a15db8df7c82f99
https://doi.org/10.1177/0954409717708527

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Three-dimensional track-ballast interaction model for the study of a culvert transition

Autor: Manuel A.G. Silva, J. N. Varandas, Paul Hölscher

Publikováno v: Soil Dynamics and Earthquake Engineering. 89:116-127

Transition zones corresponding to the passage from railway tracks on embankments to settlement free structures are frequently problematic for maintenance. Changing stiffness of the track and differential settlements are main causes for the degradatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6c9e027b331ca757fd2451a09c113e6b
https://doi.org/10.1016/j.soildyn.2016.07.013

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Non-Linear Behaviour of Geomaterials in Railway Tracks under Different Loading Conditions

Autor: Eduardo Fortunato, André Paixão, J. N. Varandas, Rui Calçada

Publikováno v: Procedia Engineering. 143:1128-1135

The resilient behaviour of the geomaterials used in railway tracks, particularly the ballast layer, is mostly non-linear and depends mainly on the loading stress path. However geomaterials are frequently considered as linear elastic in structural ana

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2010126848f13f3090dea28d7fd3788e

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Long-term deformation of railway tracks considering train-track interaction and non-linear resilient behaviour of aggregates – a 3D FEM implementation

Autor: J. N. Varandas, B. Zuada Coelho, Eduardo Fortunato, André Paixão, Paul Hölscher

Publikováno v: Computers and Geotechnics. 126:103712

Railway track designers and maintenance entities have long been pursuing for a robust and reliable method to predict the track’s long-term behaviour. The complexity of this railway system, in terms of its changing structural and material behaviour

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::076df4d9db0d127bdf10c860c75db82d
https://doi.org/10.1016/j.compgeo.2020.103712

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Investigating the Influence of Auxiliary Rails on Dynamic Behavior of Railway Transition Zone by a 3D Train-Track Interaction Model

Autor: Jabbar Ali Zakeri, J. N. Varandas, Morteza Esmaeili, Hamidreza Heydari-Noghabi

Publikováno v: Latin American Journal of Solids and Structures, Volume: 14, Issue: 11, Pages: 2000-2018, Published: 2017
Latin American Journal of Solids and Structures, Vol 14, Iss 11, Pp 2000-2018
Latin American Journal of Solids and Structures v.14 n.11 2017
Latin American journal of solids and structures
Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM)
instacron:ABCM

Abrupt track vertical stiffness variations along railway tracks can lead to increased dynamic loads, asymmetric deformations, damaged track components, and consequently, increased maintenance costs. The junction of slab track and ballasted track is o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bdfbb9f3ac50fb323601a76f436f9aa8
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-78252017001102000&lng=en&tlng=en

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