Effects of Internal Force Redistribution on the Limit States of Continuous Beams with GFRP Reinforcement
Faculty of Civil Engineering, University of Montenegro, Cetinjski put bb, 81000 Podgorica, Montenegro
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Appl. Sci. 2020, 10(11), 3973; https://doi.org/10.3390/app10113973
Received: 9 May 2020
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Revised: 29 May 2020
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Accepted: 1 June 2020
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Published: 8 June 2020
(This article belongs to the Section Civil Engineering)
Fiber-reinforced polymers (FRP) are commonly used as internal reinforcement in RC structures in aggressive environments. The design of concrete elements reinforced with FRP bars is usually ruled by serviceability criteria rather than the ultimate limit state. Six continuous concrete beams over two spans with longitudinal and transverse glass FRP (GFRP) reinforcement were investigated until failure to estimate the effects of different reinforcement arrangements on the limit states of continuous beams. The ratio of longitudinal reinforcement between the midspan and middle support sections (i.e., the design moment redistribution) and the type of GFRP reinforcement were the main parameters. The experimental results were compared to prediction models and other code formulations under serviceability and ultimate limit states. The bond-dependent coefficient kb was investigated to assess adhesion conditions for GFRP reinforcement and concrete. The results showed that moment redistribution in continuous beams with GFRP reinforcement happens with slippage between the reinforcement and concrete in the middle support without the load capacity being reduced. A modified model was suggested for better deflection prediction of continuous beams reinforced with GFRP bars. Based on deformability factors, the tested continuous beams, although containing GFRP reinforcement that has brittle behavior, showed a certain kind of ductile behavior.
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Keywords:
GFRP bars; continuous beams; moment redistribution; serviceability; cracks; deflection; bond strength; deformability
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MDPI and ACS Style
Baša, N.; Kopitović Vuković, N.; Ulićević, M.; Muhadinović, M. Effects of Internal Force Redistribution on the Limit States of Continuous Beams with GFRP Reinforcement. Appl. Sci. 2020, 10, 3973. https://doi.org/10.3390/app10113973
AMA Style
Baša N, Kopitović Vuković N, Ulićević M, Muhadinović M. Effects of Internal Force Redistribution on the Limit States of Continuous Beams with GFRP Reinforcement. Applied Sciences. 2020; 10(11):3973. https://doi.org/10.3390/app10113973
Chicago/Turabian StyleBaša, Nikola, Nataša Kopitović Vuković, Mladen Ulićević, and Mladen Muhadinović. 2020. "Effects of Internal Force Redistribution on the Limit States of Continuous Beams with GFRP Reinforcement" Applied Sciences 10, no. 11: 3973. https://doi.org/10.3390/app10113973
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