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    Eccentric compression behavior of Steel-FRP composite bars RC columns under coupling action of chloride corrosion and load

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    Publication date
    2023-04
    Author
    Ge, W.
    Zhang, S.
    Zhang, Z.
    Guan, Z.
    Ashour, Ashraf cc
    Sun, C.
    Lu, W.
    Cao, D.
    Keyword
    Chloride corrosion
    Concrete column
    Eccentric compression
    Experimental study
    Steel-FRP composite bar
    Peer-Reviewed
    Yes
    Open Access status
    closedAccess
    
    Metadata
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    Abstract
    In order to investigate the eccentric compression behaviors of steel-FRP composite bar (SFCB) reinforced concrete (RC) columns subjected to chloride corrosion, the mechanical experiments of chloride corroded SFCBs and SFCBs RC eccentric compression columns were conducted. The effect of reinforcement type and ratio, eccentricity, slenderness, stress level and corrosion duration on bearing capacity, deformation, crack and failure pattern were investigated. The results showed that the strength retention ratio of reinforcement decreases with the increase of corrosion duration, the ultimate strengths of steel rebar, SFCB and FRP rebar decreased by 12.2%, 9.9% and 3.6%, respectively, when compared with those of uncorroded counterparts. With the increase of steel content of reinforcement, the load bearing capacity of eccentric compression RC column increases while the deformation decreases gradually. The load bearing capacity of corroded steel, SFCB and FRP RC columns maximally decreased by 16.6%, 12.4% and 7.2%, respectively, when compared with those of uncorroded counterparts. Based on the simplified materials constitutive relations and reasonable basic assumptions, formulae for discriminate failure mode, moment magnification factor and bearing capacity were developed. The predicted failure pattern, moment magnification factor and bearing capacity are in good agreement with the test results, confirming the validity of the proposed formulae, the results can be used as a reference for engineering application.
    URI
    http://hdl.handle.net/10454/19686
    Version
    No full-text in the repository
    Citation
    Ge W, Zhang S, Zhang Z et al (2023) Eccentric compression behavior of Steel-FRP composite bars RC columns under coupling action of chloride corrosion and load. Structures. 50: 1051-1068.
    Link to publisher’s version
    https://doi.org/10.1016/j.istruc.2023.02.090
    Type
    Article
    Collections
    Engineering and Digital Technology Publications

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