Shear reinforcement of reinforced concrete with steel fibers beams according to ACI 318-08 and ACI 318-14

Sánchez Pérez, José Luis and González García, María de las Nieves and Olmedo Zazo, Fernando Israel and Llauradó Pérez, Nuria (2019). Shear reinforcement of reinforced concrete with steel fibers beams according to ACI 318-08 and ACI 318-14. In: "4º Congreso Internacional de Innovación Tecnológica en Edificación (CITE 2019)", 6-8 marzo 2019, Madrid, España. ISBN 978-84-1639-788-4. pp. 266-267.

Description

Title: Shear reinforcement of reinforced concrete with steel fibers beams according to ACI 318-08 and ACI 318-14
Author/s:
  • Sánchez Pérez, José Luis
  • González García, María de las Nieves
  • Olmedo Zazo, Fernando Israel
  • Llauradó Pérez, Nuria
Item Type: Presentation at Congress or Conference (Other)
Event Title: 4º Congreso Internacional de Innovación Tecnológica en Edificación (CITE 2019)
Event Dates: 6-8 marzo 2019
Event Location: Madrid, España
Title of Book: Libro de actas = Abstracts book
Date: 2019
ISBN: 978-84-1639-788-4
Subjects:
Freetext Keywords: SFRC, Shear, Concrete, ACI 318
Faculty: E.T.S. de Edificación (UPM)
Department: Construcciones Arquitectónicas y su Control
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

More information

Item ID: 64717
DC Identifier: http://oa.upm.es/64717/
OAI Identifier: oai:oa.upm.es:64717
Deposited by: Memoria Investigacion
Deposited on: 20 Nov 2020 10:52
Last Modified: 20 Nov 2020 10:52
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