Memorias de investigación
Ponencias en congresos:
Shear reinforcement of reinforced concrete with steel fibers beams according to ACI 318-08 and ACI 318-14
Año:2019
Áreas de investigación
  • Ingeniería de construcción
Datos
Descripción
The code ACI 318 has allowed the replacement of the fences or stirrups as shear reinforcement in concrete beams reinforced with steel fibers (SFRC) when a number of conditions were fulfilled. The edition of the Year 2014, ACI 318-14, has assumed a conceptual change regarding the edition of 2008, ACI 318-08 which is analyzed below. In both editions the conditions are set at two levels, at the material level and at the structure level. At the material level, the edition of 2008 specified that in order to be able to admit the SFRC as a shear resisting material, the following three conditions should be fulfilled simultaneously: 1. The dosage of steel fibers must be equal to or greater than 60kg of fibers per cubic metre of concrete 2. The residual resistance obtained in the flexion test performed according to ASTM C1609M when the dflection reaches 1/300 of the length must be greatert han or equal to 90% of the first peak of resistance obtained in the test and 90% of the resistance to flexural , fr. 3. The residual resistance obtained in the flexion test performed according to ASTM C1609M when the deflection reaches 1/150 of the length must be greater than or equal to 75% of the first peak of resistance obtained in the test and 75% of the resistance to flexural fr. The edition of 2014 maintains the three previous conditions but also requires that the fibers used i) must be corrugated and comply with ASTM A820M, ii) must have a slenderness between 50 and 100 and III) must comply with ASTM C1116M. At the level of structure, the edition of 2008 allowed the total substitution of the strrups when it was beams with concrete of normal weight reinforced with steel fibers with a resistance specified to compression no higher than 40MPa, a cross section no greater than 600 mm and in which It complies with the following relation... The previous analysis makes it possible to conclude that the latest edition of the ACI 318 represents a more conservative turn in the treatment of shear sizing in beams with SFRC, both in the requirements at the material level and at the structure level.
Internacional
Si
Nombre congreso
CITE 2019. International Conference on Technological Innovation in Building
Tipo de participación
960
Lugar del congreso
Revisores
Si
ISBN o ISSN
9788416397884
DOI
Fecha inicio congreso
06/03/2019
Fecha fin congreso
08/03/2019
Desde la página
266
Hasta la página
267
Título de las actas
Abstracts Book CITE 2019
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Patología de estructuras, protecciones colectivas y medios auxiliares de edificación.
  • Departamento: Tecnología de la Edificación
  • Departamento: Construcciones Arquitectónicas y su Control