• seismic frp retrofit of circular single-column bents using a ductility wrap envelope to alter failure modes

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 763
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the target displacement ductility requirements for circular reinforced concrete (r/c) single-column bridge bents are considered using a proposed multi-failure mode algorithm to determine the required thickness of fiber reinforced polymer wraps (frps). the procedure is developed using two in-house computer algorithms, paccc (plastic analysis of circular concrete columns) and paccc-frp, to generate a moment-curvature analysis using circular segments and subsequent failure mode predictions in single-column bents for both frp-wrapped and unwrapped circular r/c sections. the results of the study were verified against published experimental tests at the ultimate force-deflection states of r/c sections and also against three commercial “software test beds”. the study uses paccc-frp to show that single-columns experiencing a brittle failure may be retrofitted with frp wraps in order to increase the displacement ductility and satisfy target ductility values within the ductility wrap envelope (dwe), or wrap-saturation level, as established herein.

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