Dynamic & Cyclic behaviour of ballast in the long term as determined in Cedex's track box

Cuellar, V. and Mira, P. and Estaire Gepp, José and Pardo de Santayana, F. and Rodríguez, M. and Pieringer, A. and Garburg, R. and Bongini, E. (2013). Dynamic & Cyclic behaviour of ballast in the long term as determined in Cedex's track box. In: "1st Railway Track Science and Engineering International Workshop - Ballast: Issues and Challenges", 05/12/2013 - 06/12/2013, UIC Paris, France. ISBN 978-0-9565951-9-5.

Description

Title: Dynamic & Cyclic behaviour of ballast in the long term as determined in Cedex's track box
Author/s:
  • Cuellar, V.
  • Mira, P.
  • Estaire Gepp, José
  • Pardo de Santayana, F.
  • Rodríguez, M.
  • Pieringer, A.
  • Garburg, R.
  • Bongini, E.
Item Type: Presentation at Congress or Conference (Article)
Event Title: 1st Railway Track Science and Engineering International Workshop - Ballast: Issues and Challenges
Event Dates: 05/12/2013 - 06/12/2013
Event Location: UIC Paris, France
Title of Book: RTSE 2013, Proceedings of the first Railway Track Science and Engineering Workshop “Ballast: Issues and Challenges”,5 – 6 December 2013,UIC Paris, Book of abstracts
Date: 2013
ISBN: 978-0-9565951-9-5
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería y Morfología del Terreno
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (301kB) | Preview

Abstract

The 6 cylinder servo-hydraulic loading system of CEDEX's track box (250 kN, 50 Hz) has been recently implemented with a new piezoelectric loading system (±20 kN, 300 Hz) allowing the incorporation of low amplitude high frequency dynamic load time histories to the high amplitude low frequency quasi-static load time histories used so far in the CEDEX's track box to assess the inelastic long term behavior of ballast under mixed traffic in conventional and high- speed lines. This presentation will discuss the results obtained in the first long-duration test performed at CEDEX's track box using simultaneously both loading systems, to simulate the pass-by of 6000 freight vehicles (1M of 225 kN axle loads) travelling at a speed of 120 km/h over a line with vertical irregularities corresponding to a medium quality lin3e level. The superstructure of the track tested at full scale consisted of E 60 rails, stiff rail pads (mayor que 450 kN/mm), B90.2 sleepers with USP 0.10 N/mm and a 0.35 m thick ballast layer of ADIF first class. A shear wave velocity of 250 m/s can be assumed for the different layers of the track sub-base. The ballast long-term settlements will be compared with those obtained in a previous long-duration quasi- static test performed in the same track, for the RIVAS [EU co-funded] project, in which no dynamic loads where considered. Also, the results provided by a high diameter cyclic triaxial cell with ballast tested in full size will be commented. Finally, the progress made at CEDEX's Geotechnical Laboratory to reproduce numerically the long term behavior of ballast will be discussed.

More information

Item ID: 29929
DC Identifier: http://oa.upm.es/29929/
OAI Identifier: oai:oa.upm.es:29929
Official URL: http://www.railway-science-workshops.org
Deposited by: Memoria Investigacion
Deposited on: 01 Sep 2014 11:41
Last Modified: 22 Apr 2016 00:16
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM