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Short and long-term cracking behaviour of GFRP reinforced concrete beams

A total of ten simply supported beams reinforced with different amounts of GFRP and steel bars were subjected to two consecutive test phases in order to evaluate their short and long-term cracking behaviour. The beams were initially tested up to service load and subjected to two additional load cycles. Subsequently, the specimens were subjected to two different levels of sustained load for 250 days. The effect of cyclic load during short-term tests resulted in an increase in crack width up to 25% more than the initial value. The sustained load led to an increase in crack width up to 2.9 times larger than that measured under the corresponding short-term load. A similar cracking behaviour was observed when reinforcing solutions with similar stiffness (GFRP or steel bars) were used. Existing models to estimate crack spacing and crack width for FRP and steel reinforced concrete elements, including ACI 440.1R-06, Eurocode 2 and Model Code 2010 are discussed and their performance is assessed against the experimental results. Model Code 2010 was found to yield more accurate predictions of the cracking behaviour of the test specimens under both short-term and long-term loading

The authors acknowledge the support provided by the Spanish Government (Ministerio de Economia y Competitividad), Project ref. BIA2013-46944-C2-2-P. The first author acknowledges the supportfrom the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme (FP7/2007-2013) and from ACCIO (Generalitat de Catalunya) under REA grant agreement no 600388. The authors also thank the support of Schok Bauteile GmbH for the supply of GFRP rebars

© Composites Part B: Engineering, 2015, vol. 77, p. 223-231

Elsevier

Author: Miàs Oller, Cristina
Torres Llinàs, Lluís
Guadagnini, M.
Turon Travesa, Albert
Date: 2015 August
Abstract: A total of ten simply supported beams reinforced with different amounts of GFRP and steel bars were subjected to two consecutive test phases in order to evaluate their short and long-term cracking behaviour. The beams were initially tested up to service load and subjected to two additional load cycles. Subsequently, the specimens were subjected to two different levels of sustained load for 250 days. The effect of cyclic load during short-term tests resulted in an increase in crack width up to 25% more than the initial value. The sustained load led to an increase in crack width up to 2.9 times larger than that measured under the corresponding short-term load. A similar cracking behaviour was observed when reinforcing solutions with similar stiffness (GFRP or steel bars) were used. Existing models to estimate crack spacing and crack width for FRP and steel reinforced concrete elements, including ACI 440.1R-06, Eurocode 2 and Model Code 2010 are discussed and their performance is assessed against the experimental results. Model Code 2010 was found to yield more accurate predictions of the cracking behaviour of the test specimens under both short-term and long-term loading
The authors acknowledge the support provided by the Spanish Government (Ministerio de Economia y Competitividad), Project ref. BIA2013-46944-C2-2-P. The first author acknowledges the supportfrom the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme (FP7/2007-2013) and from ACCIO (Generalitat de Catalunya) under REA grant agreement no 600388. The authors also thank the support of Schok Bauteile GmbH for the supply of GFRP rebars
Format: application/pdf
ISSN: 1359-8368
Document access: http://hdl.handle.net/10256/10956
Language: eng
Publisher: Elsevier
Collection: MINECO/PE 2014-2016/BIA2013-46944-C2-2-P
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.compositesb.2015.03.024
Articles publicats (D-EMCI)
Is part of: © Composites Part B: Engineering, 2015, vol. 77, p. 223-231
Rights: Tots els drets reservats
Subject: Formigó armat -- Fissuració
Reinforced concrete -- Cracking
Assaigs de materials
Materials -- Testing
Mecànica de fractura
Fracture mechanics
Title: Short and long-term cracking behaviour of GFRP reinforced concrete beams
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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