Observatorio de I+D+i UPM

Memorias de investigación
Artículos en revistas:
Influence of temperature on the longitudinal cracking in multipurpose precast concrete sleepers prior to their installation
Año:2019
Áreas de investigación
  • Fractura,
  • Ingenierías,
  • Prefabricacion
Datos
Descripción
Prestressed monoblock railway sleepers are concrete elements with almost no reinforcement apart from the prestressing wires, which makes them very sensitive to any stress variation that can induce tensile stresses. In recent years, severe longitudinal cracking has been observed in a number of sleepers in hot regions of Spain, even before these elements were put in service. This work studies the problem while considering the thermal variation as the main factor affecting this cracking phenomenon. A non-linear static load-step analysis is applied on a non-linear finite element model to reproduce the problem and, after its experimental validation, the influence of three design parameters of the sleepers are studied: the nature of concrete aggregates, the dowel thickness, and the dowel material. The results show that all these three parameters may have significant influence on the problem, with the dowel material being the most important parameter. When the dowels are made of a material with a high elastic modulus and a high thermal expansion coefficient, the crack opening induced by a realistic thermal variation can reach significant values and result in longitudinal crack propagation. The changes of humidity are not considered in this study because they are beyond the scope of this work.
Internacional
Si
JCR del ISI
Si
Título de la revista
Materials
ISSN
****-****
Factor de impacto JCR
3,057
Información de impacto
Volumen
12
DOI
10.3390/ma12172731
Número de revista
2731
Desde la página
1
Hasta la página
17
Mes
AGOSTO
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Fernando Suarez Guerra (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Tecnología de la Construcción y Ciencia de los Materiales para la edificación y la obra Civil
S2i 2021 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)