TY - JOUR
T1 - Influence of track foundation on the performance of ballast and concrete slab tracks under cyclic loading
T2 - Physical modelling and numerical model calibration
AU - Ramos, A.
AU - Gomes Correia, A.
AU - Calçada, R.
AU - Alves Costa, P.
AU - Esen, A.
AU - Woodward, P. K.
AU - Connolly, D. P.
AU - Laghrouche, O.
N1 - Funding Information:
This work was partially carried out under the framework of In2Track2 (Shift2Rail). This work was also supported by FCT - “Fundação para a Ciência e a Tecnologia”, within ISISE, project UID/ECI/04029/2019. Additionally, by FCT: PD/BD/127814/2016 and FCT/MCTES (PIDDAC): UIDB/04708/2020 of the CONSTRUCT – “Instituto de I&D em Estruturas e Construções”.
Funding Information:
The authors are also grateful to the UK Engineering and Physical Sciences Research Council (EPSRC) for funding the LOCORPS project under Grant Number EP/N009207/1 .
Publisher Copyright:
© 2021 Elsevier Ltd
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/3/29
Y1 - 2021/3/29
N2 - Ballast and slab railway track structures are constructed from different materials, thus requiring different maintenance strategies. Therefore, this paper compares the settlement performance of both structures using laboratory experiments, and calibrates numerical models based upon the results. Firstly, a comparison of the short and long-term behaviour of ballasted and slab tracks under cyclic loading is performed at full-scale. Both tracks have the same track foundation but a different track superstructure, and are subject to 3 million cycles of loading. The results are used to develop and calibrate the short-term response of a 3D finite element model of both track structures. They are also used to calibrate an empirical permanent deformation model for the track foundation, where the number of load cycles and stresses are the main inputs. A strong agreement is found between the numerical and experimental results. This justifies the track modelling approach in predicting the long-term behaviour of track structures where the subgrade is influential.
AB - Ballast and slab railway track structures are constructed from different materials, thus requiring different maintenance strategies. Therefore, this paper compares the settlement performance of both structures using laboratory experiments, and calibrates numerical models based upon the results. Firstly, a comparison of the short and long-term behaviour of ballasted and slab tracks under cyclic loading is performed at full-scale. Both tracks have the same track foundation but a different track superstructure, and are subject to 3 million cycles of loading. The results are used to develop and calibrate the short-term response of a 3D finite element model of both track structures. They are also used to calibrate an empirical permanent deformation model for the track foundation, where the number of load cycles and stresses are the main inputs. A strong agreement is found between the numerical and experimental results. This justifies the track modelling approach in predicting the long-term behaviour of track structures where the subgrade is influential.
KW - Concrete slab track
KW - Cyclic track testing
KW - Numerical model calibration
KW - Railroad ballast track
KW - Railway physical modelling
KW - Settlement
UR - http://www.scopus.com/inward/record.url?scp=85099774941&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2021.122245
DO - 10.1016/j.conbuildmat.2021.122245
M3 - Article
AN - SCOPUS:85099774941
VL - 277
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 122245
ER -