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Polymers 2015, 7(11), 2461-2477; doi:10.3390/polym7111524

New Proposal for Flexural Strengthening of Reinforced Concrete Beams Using CFRP T-Shaped Profiles

Lodz University of Technology, al. Politechniki 6, 90-924 Lodz, Poland
These authors contributed equally to this work.
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Author to whom correspondence should be addressed.
Academic Editors: Alper Ilki and Masoud Motavalli
Received: 8 August 2015 / Revised: 6 November 2015 / Accepted: 16 November 2015 / Published: 24 November 2015
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Abstract

The purpose of this study was to evaluate the performance of a novel strengthening system using T-shaped carbon fiber reinforced polymer (CFRP) profiles. The proposed system successfully combines the advantages of two established strengthening techniques, namely the near surface mounted (NSM) and externally bonded (EB) methods. The paper presents the experimental results of structural tests carried out on seven flexurally-strengthened and two non-strengthened full-scale reinforced concrete (RC) members. Two T-shaped profiles having heights of 15 and 30 mm were applied. The main parameters of concrete strength and composite strengthening ratio were investigated to evaluate the efficiency of the proposed flexural strengthening system. All specimens were tested under a quasi-static six-point bending configuration. The test results showed a significant increase in the load bearing capacity and the stiffness of the RC beams with strengthening and also a notable reduction in maximum deflections. The high tensile strength utilization of the CFRP profiles places this strengthening technique as a promising alternative to other, less structurally-efficient systems. View Full-Text
Keywords: flexural strengthening; CFRP; T-shaped profiles; near surface mounted reinforcement; stiffness; intermediate crack debonding flexural strengthening; CFRP; T-shaped profiles; near surface mounted reinforcement; stiffness; intermediate crack debonding
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Kotynia, R.; Cholostiakow, S. New Proposal for Flexural Strengthening of Reinforced Concrete Beams Using CFRP T-Shaped Profiles. Polymers 2015, 7, 2461-2477.

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