Experimental study on crack width and crack spacing for Glass-FRP reinforced concrete beams
| Autor: | L. Torres, Cristina Barris, I. Vilanova, C. Miàs, Miquel Llorens |
|---|---|
| Přispěvatelé: | Ministerio de Economía y Competitividad (Espanya) |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
business.industry Reinforced concrete -- Cracking 0211 other engineering and technologies 020101 civil engineering Young's modulus 02 engineering and technology Structural engineering Fibre-reinforced plastic Strength of materials 0201 civil engineering Cracking symbols.namesake Flexural strength Reinforced solid Formigó armat -- Fissuració 021105 building & construction Pure bending symbols Composite material business Resistència de materials Concrete cover Civil and Structural Engineering |
| Zdroj: | © Engineering Structures, 2017, vol. 131, p. 231-242 Articles publicats (D-EMCI) DUGiDocs – Universitat de Girona instname |
| ISSN: | 0141-0296 |
| DOI: | 10.1016/j.engstruct.2016.11.007 |
| Popis: | 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 |
| Databáze: | OpenAIRE |
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