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Ponencias en congresos:
EFFECT OF LOADING RATE ON THE FRACTURE BEHAVIOUR OF THREE DIFFERENT STEEL- FIBER REINFORCED CONCRETES
Año:2016
Áreas de investigación
  • Ingenierías
Datos
Descripción
Three-point bending tests on notched beams of three types of steel fiber-reinforced concretes (SFRC) have been conducted using both a servo-hydraulic machine and a drop-weight impact instrument. These three different concretes had the same matrix, while various fiber contents and deflection hardening or softening behaviours, i.e., 40 kg/m3 Dramix OL 13/0.20 (Concrete PA), 40 kg/m3 Dramix OL 13/0.20 + 20 kg/m3 Dramix RC 80/30 BP (Concrete PB) and 40 kg/m3 Dramix OL 13/0.20 + 60 kg/m3 Dramix RC 80/30 BP (Concrete PC), respectively. The shape and geometry of the specimen followed the RILEM recommendation but with a reducing factor 1.5. The flexural strength and the fracture energy were measured over a wide range of loading rates (displacement rates), spanning six orders of magnitude, from 2.20 ×10-3 mm/s (Quasi-static) to 2.66 ×103 mm/s. The results show that the fracture energy and the flexural strength increase as the loading rate increases for these three concretes. Besides, such a trend is relatively mild under low rates. The gain of the flexural strength is around 30% compared with its quasi-static values. For Concretes PA and PB, the enhancement of fracture energy is around 20%, but 30% for Concrete PC. However, under high rates the increase in the fracture energy and the peak load are pronounced. For Concrete PA, the dynamic increase factors of the flexural strength and the fracture energy are approximately 6 and 3, while for Concrete PC, they are around 4 and 2 respectively. That is, the higher the fiber content is, the less rate sensitivity gets.
Internacional
No
Nombre congreso
33 ENCUENTRO DEL GRUPO ESPAÑOL DE FRACTURA (GEF)
Tipo de participación
960
Lugar del congreso
San Sebastián (España)
Revisores
Si
ISBN o ISSN
0000-0000
DOI
Fecha inicio congreso
09/03/2016
Fecha fin congreso
11/03/2016
Desde la página
482
Hasta la página
487
Título de las actas
EFFECT OF LOADING RATE ON THE FRACTURE BEHAVIOUR OF THREE DIFFERENT STEEL- FIBER REINFORCED CONCRETES
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: X.X. Zhang (Universidad de Castilla-La Mancha)
  • Autor: G. Ruiz (Universidad de Castilla-La Mancha)
  • Autor: M. Tarifa (Universidad de Castilla-La Mancha)
  • Autor: W.H. Alhazmi (Universidad Politécnica de Madrid)
  • Autor: David Angel Cendon Franco (UPM)
  • Autor: Francisco Rafael Galvez Diaz-Rubio (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Materiales Estructurales Avanzados y Nanomateriales
  • Centro o Instituto I+D+i: CENTRO INVEST. MATERIALES ESTRUCTURALES (CIME)
  • Departamento: Ciencia de Materiales
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