RFI Italian State Railways

Rome, Italy

RFI Italian State Railways

Rome, Italy
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De Iorio A.,University of Naples Federico II | Grasso M.,University of Naples Federico II | Penta F.,University of Naples Federico II | Pucillo G.P.,University of Naples Federico II | And 4 more authors.
Frattura ed Integrita Strutturale | Year: 2014

In the present paper the design and construction choices of a test field for the ballast lateral resistance measurement, in order to produce data useful for the development of a numerical model able to simulate the service critical conditions of a continuous welded rail track, are described. Some construction details described herein allow to better understand the methodological approach followed in the design of experiments, the tests management philosophy as well as of the accuracy achieved in their implementation. © 2014, Gruppo Italiano Frattura. All rights reserved.


De Iorio A.,University of Naples Federico II | Grasso M.,University of Naples Federico II | Penta F.,University of Naples Federico II | Pucillo G.P.,University of Naples Federico II | And 4 more authors.
Frattura ed Integrita Strutturale | Year: 2014

Several studies have been carried out until now by various Research Agencies and Railway Administrations to quantify the effects of the track-bed geometrical characteristics on the transverse strength of the track. Unfortunately, not all the possible scenarios in terms of track components, track-bed cross profile, operating conditions etc. have been investigated and not all the relevant variables have been directly measured. Therefore data available from the literature have different degrees of reliability. With the aim of enlarging the knowledge on the track stability and covering much of the possible relevant scenarios, an experimental research program has been developed in the framework of a cooperation between RFI, Italcertifer and DII. In order to perform the investigation under quite general conditions and to reduce the experimentation costs, n. 28 significant scenarios have been identified and reproduced on as many independent track segments. By applying on each track segment a transversal load, the strength of the ballast-sleeper interface has been determined. The results relative to the first four scenarios are presented in terms of applied load vs. lateral track displacement diagrams and in more synthetic numerical tables. © 2014, Gruppo Italiano Frattura. All rights reserved.

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