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Experimental study on crack width and crack spacing for Glass-FRP reinforced concrete beams

Fibre Reinforced Polymers (FRP) have been proven to be adequate substitutes for steel reinforcement under aggressive environments for flexural Reinforced Concrete (RC) elements. Their mechanical properties, basically their lower modulus of elasticity, derive in larger crack widths and deflections, in particular when Glass-FRP (GFRP) bars are used. Moreover, their different bond behaviour, mainly due to their mechanical properties and different surface configurations, make necessary to assess the available equations to determine crack width need to be assessed. This paper presents a study on the cracking behaviour of GFRP RC elements based on the results of an experimental programme involving 15 beams. The paper studies the influence of the reinforcing material, ϕ/ρeff ratio, concrete cover, stirrup spacing and bond between the concrete and the reinforcement. For this purpose, two different types of GFRP and steel bars were used. The cracking behaviour (crack width and spacing) in the pure bending zone was analysed up to the service load. Crack width was consistently acquired by using a Digital Image Correlation (DIC) technique. The 2D full-field displacements of the pure flexural zone were registered using 4 digital cameras and commercial software that enables the evolution of the specimen cracks to be analysed. Finally, bond coefficients have been adjusted to different formulations in terms of crack spacing and crack width

The authors acknowledge the support provided by the Spanish Government (Ministerio de Ciencia e Innovación), Project. BIA2013-46944-C2-2-P. The authors also wish to acknowledge the support of Hughes Brothers, Inc. and Schöck Bauteile GmbH for supplying the GFRP bars. The fourth author acknowledges the support from the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme (FP7/2007-2013) and from ACCIÓ (Generalitat de Catalunya) under REA grant agreement no. 600388

Elsevier

Director: Ministerio de Economía y Competitividad (Espanya)
Autor: Barris Peña, Cristina
Torres Llinàs, Lluís
Vilanova Marco, Irene
Miàs Oller, Cristina
Llorens Sulivera, Miquel
Resum: Fibre Reinforced Polymers (FRP) have been proven to be adequate substitutes for steel reinforcement under aggressive environments for flexural Reinforced Concrete (RC) elements. Their mechanical properties, basically their lower modulus of elasticity, derive in larger crack widths and deflections, in particular when Glass-FRP (GFRP) bars are used. Moreover, their different bond behaviour, mainly due to their mechanical properties and different surface configurations, make necessary to assess the available equations to determine crack width need to be assessed. This paper presents a study on the cracking behaviour of GFRP RC elements based on the results of an experimental programme involving 15 beams. The paper studies the influence of the reinforcing material, ϕ/ρeff ratio, concrete cover, stirrup spacing and bond between the concrete and the reinforcement. For this purpose, two different types of GFRP and steel bars were used. The cracking behaviour (crack width and spacing) in the pure bending zone was analysed up to the service load. Crack width was consistently acquired by using a Digital Image Correlation (DIC) technique. The 2D full-field displacements of the pure flexural zone were registered using 4 digital cameras and commercial software that enables the evolution of the specimen cracks to be analysed. Finally, bond coefficients have been adjusted to different formulations in terms of crack spacing and crack width
The authors acknowledge the support provided by the Spanish Government (Ministerio de Ciencia e Innovación), Project. BIA2013-46944-C2-2-P. The authors also wish to acknowledge the support of Hughes Brothers, Inc. and Schöck Bauteile GmbH for supplying the GFRP bars. The fourth author acknowledges the support from the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme (FP7/2007-2013) and from ACCIÓ (Generalitat de Catalunya) under REA grant agreement no. 600388
Accés al document: http://hdl.handle.net/2072/298811
Llenguatge: eng
Editor: Elsevier
Drets: Tots els drets reservats
Matèria: Resistència de materials
Strength of materials
Formigó armat -- Fissuració
Reinforced concrete -- Cracking
Títol: Experimental study on crack width and crack spacing for Glass-FRP reinforced concrete beams
Tipus: info:eu-repo/semantics/article
Repositori: Recercat

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