Comparison of different models of calculation to evaluate the resistance to compression of the concrete confined with carbon fiber tissues

Piñero Díaz, José Ángel and Brizuela Valenzuela, Daniela and González García, María de las Nieves and Prieto Barrio, María Isabel (2019). Comparison of different models of calculation to evaluate the resistance to compression of the concrete confined with carbon fiber tissues. In: "4º Congreso Internacional de Innovación Tecnológica en Edificación (CITE 2019)", 6-8 marzo 2019, Madrid, España. ISBN 978-84-1639-788-4. pp. 262-263.

Description

Title: Comparison of different models of calculation to evaluate the resistance to compression of the concrete confined with carbon fiber tissues
Author/s:
  • Piñero Díaz, José Ángel
  • Brizuela Valenzuela, Daniela
  • González García, María de las Nieves
  • Prieto Barrio, María Isabel
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: Confined, Concrete, CFRP, ACI, FIB
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 resistance of concrete to compression can be increased very importantly by its confinement. The confinement of the concrete by means of the external gluing of high resistance fiber fabrics is a technique that has been known for decades and is increasingly used in reinforcement works of structural elements subjected to compression. Carbon fiber fabrics are commonly used, due to their high strength and high modulus of elasticity. The break of the elements occurs when the tensile fiber fails. There are different models to predict the compressive strength of concrete confined with this type of fabric. In America, the model proposed by the ACI is usually used, while in Europe, the one proposed by the FIB is used. In both models, the strength of the confined concrete is obtained from the geometry and strength of the unconfined concrete and the geometric and mechanical characteristics of the fabric that confines the concrete. However, the expressions used are conceptually different. First, for ACI the increased strength of the confined concrete is independent of the strength of the unconfined concrete. Secondly, ACI decreases the maximum deformation at which the fabric can work (and therefore its resistance) to a value close to half of the ultimate deformation of the fabric tested to pure traction, as a result of multiplying by the coefficients ?f y ke, while FIB does not specify this point clearly.

More information

Item ID: 64560
DC Identifier: http://oa.upm.es/64560/
OAI Identifier: oai:oa.upm.es:64560
Deposited by: Memoria Investigacion
Deposited on: 13 Nov 2020 10:43
Last Modified: 13 Nov 2020 10:43
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