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

Cuellar, V.; Mira, P.; Estaire Gepp, José; Pardo de Santayana, F.; Rodríguez, M.; Pieringer, A.; Garburg, R. y Bongini, E. (2013). Dynamic & Cyclic behaviour of ballast in the long term as determined in Cedex's track box. En: "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.

Descripción

Título: Dynamic & Cyclic behaviour of ballast in the long term as determined in Cedex's track box
Autor/es:
  • Cuellar, V.
  • Mira, P.
  • Estaire Gepp, José
  • Pardo de Santayana, F.
  • Rodríguez, M.
  • Pieringer, A.
  • Garburg, R.
  • Bongini, E.
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 1st Railway Track Science and Engineering International Workshop - Ballast: Issues and Challenges
Fechas del Evento: 05/12/2013 - 06/12/2013
Lugar del Evento: UIC Paris, France
Título del Libro: 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
Fecha: 2013
ISBN: 978-0-9565951-9-5
Materias:
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Ingeniería y Morfología del Terreno
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Más información

ID de Registro: 29929
Identificador DC: http://oa.upm.es/29929/
Identificador OAI: oai:oa.upm.es:29929
URL Oficial: http://www.railway-science-workshops.org
Depositado por: Memoria Investigacion
Depositado el: 01 Sep 2014 11:41
Ultima Modificación: 22 Abr 2016 00:16
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