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    Flexural performance of reinforced concrete beams strengthened with prestressed near-surface-mounted FRP reinforcements

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    Publication date
    2016-04-15
    Author
    Kara, Ilker F.
    Ashour, Ashraf F.
    Köroğlu, Mehmet A.
    Keyword
    Fibres; Hybrid; Corrosion; Numerical Analysis; Fibre reinforced polymer (FRP); Concrete beams; Reinforcing bars
    Rights
    © 2016 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
    Peer-Reviewed
    yes
    
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    Abstract
    A numerical method for estimating the curvature, deflection and moment capacity of reinforced concrete beams strengthened with prestressed near-surface-mounted (NSM) FRP bars/strips is presented. A sectional analysis is carried out to predict the moment–curvature relationship from which beam deflections and moment capacity are then calculated. Based on the amount of FRP bars, different failure modes were identified, namely tensile rupture of prestressed FRP bars and concrete crushing before or after yielding of steel reinforcement. Comparisons between experimental results available in the literature and predicted curvature, moment capacity and deflection of reinforced concrete beams with prestressed NSM FRP reinforcements show good agreement. A parametric study concluded that higher prestressing levels improved the cracking and yielding loads, but decreased the beam ductility compared with beams strengthened with nonprestressed NSM FRP bars/strips.
    URI
    http://hdl.handle.net/10454/7641
    Version
    Accepted Manuscript
    Citation
    Kara IF, Ashour AF and Köroğlu MA (2016) Flexural performance of reinforced concrete beams strengthened with prestressed near-surface-mounted FRP reinforcements. Composites Part B: Engineering. 91: 371–383.
    Link to publisher’s version
    http://dx.doi.org/10.1016/j.compositesb.2016.01.023
    Type
    Article
    Collections
    Engineering and Informatics Publications

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