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Browsing by Author Yu, Piyong

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    • Mechanical devices for manually prestressing FRP and their applications in structural strengthening
    Authors: Yu, Piyong (2006)

    Fiber reinforced polymer (FRP) systems have demonstrated to be effective for the retrofitting of masonry walls and reinforced concrete (RC) members. Prestressing of the FRP can further improve the serviceability and capacity of the strengthened elements. This dissertation presents the development of one mechanical device to prestress glass FRP (GFRP) bars and another device to prestress carbon FRP (CFRP) sheets and their applications for the retrofit of unreinforced masonry (URM) walls and RC beams. For the GFRP bar system, the bars are installed in grooves of the URM walls with near surface mounted (NSM) technique and then post-tensioned with the hand-held device to partially close ...