Observatorio de I+D+i UPM

Descripción
The traditional ballast track structures are still being used in high speed railways lines with success, however technical problems or performance features have led to non-ballast track solution in some cases. A considerable maintenance work is needed for ballasted tracks due to the track deterioration. Therefore it is very important to understand the mechanism of track deterioration and to predict the track settlement or track irregularity growth rate in order to reduce track maintenance costs and enable new track structures to be designed. The objective of this work is to develop the most adequate and efficient models for calculation of dynamic traffic load effects on railways track infrastructure, and then evaluate the dynamic effect on the ballast track settlement, using a ballast track settlement prediction model, which consists of the vehicle/track dynamic model previously selected and a track settlement law. The calculations are based on dynamic finite element models with direct time integration, contact between wheel and rail and interaction with railway cars. A initial irregularity profile is used in the prediction model. The track settlement law is considered to be a function of number of loading cycles and the magnitude of the loading, which represents the long-term behavior of ballast settlement. The results obtained include the track irregularity growth and the contact force in the final interaction of numerical simulation.
Internacional	Si
Nombre congreso	CONGRESO DE MÉTODOS NUMÉRICOS EM ENGENHARIA 2011
Tipo de participación	960
Lugar del congreso	COIMBRA, PORTUGAL
Revisores	Si
ISBN o ISSN	0000-0000
DOI
Fecha inicio congreso	14/06/2011
Fecha fin congreso	17/06/2011
Desde la página	103
Hasta la página	103
Título de las actas	MÉTODOS NUMÉRICOS EM ENGENHARIA 2011

Esta actividad pertenece a memorias de investigación

• Autor: Gia Khanh Nguyen (UPM)
• Autor: Jose Maria Goicolea Ruigomez (UPM)
• Autor: Felipe Gabaldon Castillo (UPM)

• Creador: Grupo de Investigación: Grupo de Mecánica Computacional
• Centro o Instituto I+D+i: Centro de Seguridad y Durabilidad Estructural y de Materiales (CISDEM). Centro Mixto UPM-CSIC
• Departamento: Mecánica de Medios Continuos y Teoría de Estructuras