[HTML][HTML] Geomechanical modelling of railroad ballast: a review

Y Alabbasi, M Hussein - Archives of Computational Methods in …, 2021 - Springer
Traditional ballasted tracks have been used intensively around the world with ballast as the
main material for tracks. Ballast has a significant contribution to the track alignment, stability …

Transition zones to railway bridges: track measurements and numerical modelling

A Paixão, E Fortunato, R Calçada - Engineering structures, 2014 - Elsevier
Railway tracks degrade faster at transition zones to railway bridges. In modern lines,
backfills with bound and unbound granular geomaterials have been used to minimize this …

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

JN Varandas, A Paixão, E Fortunato, BZ Coelho… - Computers and …, 2020 - Elsevier
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 …

Dynamic behaviour of the track in transitions zones considering the differential settlement

H Wang, V Markine - Journal of Sound and Vibration, 2019 - Elsevier
Transition zones in railway tracks are the locations with considerable changes in supporting
structures. Because of the difference in the structures or material properties, the differential …

Numerical simulations to improve the use of under sleeper pads at transition zones to railway bridges

A Paixão, JN Varandas, E Fortunato, R Calçada - Engineering structures, 2018 - Elsevier
Transition zones to bridges and other structures are critical locations in railway tracks that
frequently evidence poor long-term performance. Under sleeper pads (USPs) are reported …

A Bayesian methodology for detection of railway ballast damage using the modified Ludwik nonlinear model

MO Adeagbo, HF Lam, YQ Ni - Engineering Structures, 2021 - Elsevier
In this paper, an improved nonlinear model of railway ballast is proposed based on the
modified Ludwik model. The accuracy of model-based structural damage detection relies on …

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

JN Varandas, A Paixão, E Fortunato - Computers & Structures, 2017 - Elsevier
Sudden changes in the structural and geotechnical properties of railway tracks along its
course are normally associated with subgrade stiffness transitions, differential settlements …

[HTML][HTML] Dynamic behavior in transition zones and long-term railway track performance

A Paixão, JN Varandas, E Fortunato - Frontiers in Built Environment, 2021 - frontiersin.org
Transition zones between embankments and bridges or tunnels are examples of critical
assets of the railway infrastructure. These locations often exhibit higher degradations rates …

Bayesian system identification of rail–sleeper–ballast system in time and modal domains: Comparative study

MO Adeagbo, HF Lam, YJ Chu - ASCE-ASME Journal of Risk and …, 2022 - ascelibrary.org
From the literature, time domain and modal domain data are commonly used in system
identification and damage detection of various systems. This paper focuses on the …

On the selection of the most plausible non-linear axial stress–strain model for railway ballast under different impulse magnitudes

MO Adeagbo, HF Lam, Q Hu - Structural Health Monitoring, 2022 - journals.sagepub.com
The effective maintenance and health monitoring of ballasted railway tracks, which involves
the determination of differential settlement, track support stress and stiffness, and the strain …