Concept

Glossaire ferroviaire

Publications associées (14)

In 2020/21, the “Chaumény” footbridge was built in posttensioned UHPFRC over a railway line in the city of Montreux, Switzerland. UHPFRC stands for Ultra High Performance Fiber Reinforced Cementitious composite. UHPFRC shows high resistance b ...

IABSE2022

Optimization of operational decisions for on-demand shared mobility systems

Martin Jean Marie Joseph Repoux

This thesis introduces new operational management policies for two types of on-demand shared mobility systems, the now well-studied one-way carsharing systems and a new innovative semi-autonomous last-mile transportation system. In addition, two associated ...

EPFL2021

Automation of the diagnosis process in the railway system : Detection of defects in concrete sleepers using vision-based machine learning models

Linah Charif

inspectors that walk over the track and check the defects on the rail surface, fasteners and sleepers. In the case of concrete sleepers, rail inspectors classify defects according to their size and occurrence over 20 sleepers. The manual inspection is erro ...

2021

Four Quadrant Bus-Tie Switch for Protection of Shipboard Power Systems

Drazen Dujic, Gabriele Ulissi

The desire to increase the voltage of DC shipboard power distribution networks to the medium voltage level derives from the pressure to reduce the operating costs of such systems by increasing their efficiency. Solid state bus-tie switches are accepted to ...

2020

IEEE2020

Identification of Train Wheel Flat Accounting for Measurement and Modeling Uncertainties

Ian Smith, Numa Joy Bertola

In railway systems, wear-induced wheel flats (out-of-roundness wheel shape) are among the most common local surface defects. They reduce the train ride comfort, increase fatigue risk and raise safety concerns. A good knowledge of wheel flats (presence and ...

2019

Integrated maintenance model for heavy haul tracks

José João Pires De Oliveira Filho

Due to the accumulation of traffic, the railway components are affected by the induced stresses. As a result, the geometry of the railways is degraded over time. The degradation occurs either through the partial loss of the track's geometry or through the ...

EPFL2016

SFRC flat slabs punching behaviour - Experimental research

António Manuel Pinho Ramos, Duarte Miguel Viúla Faria

The use of randomly distributed steel fibres in the concrete mix improves its mechanical properties. In the particular case of a flat slab-column connection, this solution can provide slabs with an increased load capacity and deformation capacity, allowing ...

Elsevier Sci Ltd2014

Consideration of nonlinear wheel-rail contact forces for dynamic vehicle-bridge interaction in high-speed railways

Pablo Antolin Sanchez, Nan Zhang

In this work models with nonlinear wheel-rail contact forces are considered for analysing the dynamic interaction between high speed trains and bridges, in order to study dynamic effects both in the bridge and in the vehicles resulting from the coupling. N ...

2013

Effect of Load Distribution and Variable Depth on Shear Resistance of Slender Beams without Stirrups

Aurelio Muttoni, Miguel Fernández Ruiz

The work and findings reported in the paper are interesting to the discussers and will advance the understanding of the shear-failure mechanism of reinforced concrete (RC) beams. Some details need further discussion and clarification. In many cases, shear ...

American Concrete Institute2013

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