Bar buckling in RC columns confined with composite materials

D. A. Bournas, Thanasis Triantafillou

    Research output: Contribution to journalArticle

    Abstract

    The onset and evolution of bar buckling at the plastic hinge of old-type reinforced concrete (RC) columns confined with composite material [fiber-reinforced polymer (FRP) and textile-reinforced mortar (TRM)] jackets was investigated experimentally and analytically in this study. The interaction between composite jacket (or concrete cover, for unconfined concrete) and embedded longitudinal compression reinforcement at the onset and evolution of bar buckling was achieved through strain measurements of the compression reinforcement. Moreover, the implementation of a recent stress-strain confinement model, which relates lateral with axial strains, allowed the description and monitoring of the axial-lateral strain relationship at the base of the columns throughout the evolution of bar buckling. Based on the aforementioned model and the experimental measurements, the postbuckling behavior of columns was related to the jacket stiffness. Finally, a semiempirical expression that gives the drift ratio of RC columns at the onset of bar buckling was modified herein for the case of FRP- or TRM-jacketed columns.

    Original languageEnglish (US)
    Pages (from-to)393-403
    Number of pages11
    JournalJournal of Composites for Construction
    Volume15
    Issue number3
    DOIs
    StatePublished - May 1 2011

    Fingerprint

    Buckling
    Reinforced concrete
    Composite materials
    Mortar
    Textiles
    Reinforcement
    Polymers
    Concretes
    Strain measurement
    Hinges
    Fiber reinforced materials
    Compaction
    Stiffness
    Plastics
    Fibers
    Monitoring

    Keywords

    • Bar buckling
    • Confinement
    • FRP
    • Reinforced concrete
    • Seismic retrofitting
    • Textile-reinforced mortar (TRM)

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Mechanical Engineering
    • Mechanics of Materials
    • Building and Construction
    • Ceramics and Composites

    Cite this

    Bar buckling in RC columns confined with composite materials. / Bournas, D. A.; Triantafillou, Thanasis.

    In: Journal of Composites for Construction, Vol. 15, No. 3, 01.05.2011, p. 393-403.

    Research output: Contribution to journalArticle

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