Textile-reinforced mortar versus fiber-reinforced polymer confinement in reinforced concrete columns

Dionysios A. Bournas, Panagiota V. Lontou, Catherine G. Papanicolaou, Thanasis Triantafillou

    Research output: Contribution to journalArticle

    Abstract

    The effectiveness of textile-reinforced mortar (TRM) jackets as a means of confining reinforced concrete (RC) columns with limited capacity due to buckling of the longitudinal bars is experimentally investigated in this study. Comparisons with fiber-reinforced polymer (FRP) jackets of equal stiffness and strength allow for the evaluation of the effectiveness of TRM versus FRP. Tests were carried out both on short prisms under concentric compression and on nearly full-scale, nonseismically detailed, RC columns subjected to cyclic uniaxial flexure under constant axial load. The compression tests on 15 RC prisms show that TRM jackets provide a substantial gain in compressive strength and deformation capacity by delaying buckling of the longitudinal bars; this gain increases with the volumetric ratio of the jacket. Compared with their FRP counter-parts, TRM jackets used in this study are slightly less effective in terms of increasing strength and deformation capacity by approximately 10%. Tests on nearly full-scale columns under cyclic uniaxial flexure show that TRM jacketing is very effective (and equally to its FRP counterpart) as a means of increasing the cyclic deformation capacity and the energy dissipation of old-lype RC columns with poor detailing by delaying bar buckling. The test results presented in this study indicate that TRM jacketing is an extremely promising solution for the confinement of RC columns, including poorly detailed ones in seismic regions.

    Original languageEnglish (US)
    Pages (from-to)740-748
    Number of pages9
    JournalACI Structural Journal
    Volume104
    Issue number6
    StatePublished - Nov 1 2007

    Fingerprint

    Mortar
    Reinforced concrete
    Textiles
    Fibers
    Polymers
    Buckling
    Prisms
    Axial loads
    Compressive strength
    Energy dissipation
    Compaction
    Stiffness

    Keywords

    • Bars
    • Buckling
    • Confinement
    • Fiber-reinforced polymer
    • Seismic retrofitting
    • Textile-reinforced mortar

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Building and Construction

    Cite this

    Textile-reinforced mortar versus fiber-reinforced polymer confinement in reinforced concrete columns. / Bournas, Dionysios A.; Lontou, Panagiota V.; Papanicolaou, Catherine G.; Triantafillou, Thanasis.

    In: ACI Structural Journal, Vol. 104, No. 6, 01.11.2007, p. 740-748.

    Research output: Contribution to journalArticle

    Bournas, Dionysios A. ; Lontou, Panagiota V. ; Papanicolaou, Catherine G. ; Triantafillou, Thanasis. / Textile-reinforced mortar versus fiber-reinforced polymer confinement in reinforced concrete columns. In: ACI Structural Journal. 2007 ; Vol. 104, No. 6. pp. 740-748.
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