Compressive strength behaviour of low -and medium- strength concrete specimens confined with carbon fibres in defective implementation conditions: an experimental study

Fernández Cánovas, Manuel and González García, Nieves and Piñero Díaz, José Ángel and Cobo Escamilla, Alfonso (2016). Compressive strength behaviour of low -and medium- strength concrete specimens confined with carbon fibres in defective implementation conditions: an experimental study. "Materiales de construcción", v. 66 (n. 324); pp. 1-9. ISSN 0465-2746. https://doi.org/10.3989/mc.2016.08315.

Description

Title: Compressive strength behaviour of low -and medium- strength concrete specimens confined with carbon fibres in defective implementation conditions: an experimental study
Author/s:
  • Fernández Cánovas, Manuel
  • González García, Nieves
  • Piñero Díaz, José Ángel
  • Cobo Escamilla, Alfonso
Item Type: Article
Título de Revista/Publicación: Materiales de construcción
Date: October 2016
ISSN: 0465-2746
Volume: 66
Subjects:
Freetext Keywords: Concrete; Composite; Compressive strength; Strain; Modulus of elasticity; Hormigón; Resistencia a la compresión; Deformación; Módulo elástico
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería Civil: Construcción
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This behaviour of low- and medium-strength concrete specimens confined with carbon fibre-reinforced polymer (CFRP) was analysed in three loading cycles. In some cases, stress levels were achieved that produced intemal microcracks, which allowed residual rigidity and the behaviour of completely microcraked concrete specimens to be studied. The specimens were subsequently tested to compression to the fracture point. Specimens reinforced in accordance with no manufacturing defects (100% CFRP reinforcement) and major manufacturing defects (50% CFRP reinforcement) were assessed for effectiveness and behaviour of the confined elements in less than ideal conditions. Results show that confinement was higher in low-resistance concretes, that the behaviour of reinforced specimens was unaffected by defective implementation conditions and that the reinforced specimens were less rigid than the non-reinforced specimens when tested up to 40% of ultimate fracture strength. Estudio experimental del comportamiento a compresión de probetas de hormigón de resistencias bajas y medias confinadas con tejidos de fibras de carbono y con defectos muy importantes de ejecución. En este trabajo se estudia el comportamiento de hormigones de resistencias bajas y medias confinados con CFRP. Se han realizado 3 ciclos de carga llegando en algunos casos a niveles de tensión que han microfisurado internamente el hormigón, lo que ha permitido estudiar la rigidez residual y el comportamiento de probetas confinadas con el hormigón totalmente microfisurado. Posteriormente todas las probetas se han ensayado a compresión hasta rotura. Los refuerzos se han realizado con buenas condiciones de ejecución y simulando grandes defectos para poder evaluar la eficacia de los elementos confinados cuando las condiciones de ejecución no son las correctas. Los resultados muestran que el efecto de confinamiento es superior en hormigones poco resistentes, el comportamiento de las probetas reforzadas es poco sensible a grandes defectos de ejecución y su rigidez es inferior al de las probetas originales cuando se ensayan hasta el 40% de la tensión de rotura.

More information

Item ID: 44280
DC Identifier: http://oa.upm.es/44280/
OAI Identifier: oai:oa.upm.es:44280
DOI: 10.3989/mc.2016.08315
Official URL: http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2041
Deposited by: Memoria Investigacion
Deposited on: 09 Feb 2017 15:55
Last Modified: 09 Feb 2017 15:55
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