A new single-shear set-up for stable debonding of FRP–concrete joints.pdfVIP

Construction and Building Materials 23 (2009) 1529–1537 Contents lists available at ScienceDirect Construction and Building Materials journal homepage: /lo cate/conbuildmat A new single-shear set-up for stable debonding of FRP–concrete joints C. Mazzotti, M. Savoia *, B. Ferracuti DISTART, Structural Engineering, University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy a r t i c l e i n f o a b s t r a c t Article history: A new experimental set-up to perform single-lap shear debonding tests on fiber reinforced polymer (FRP) Available online 29 May 2008 reinforcements bonded to concrete is presented. Back sides of both FRP reinforcement (sheet or plate) and concrete specimen are fixed to an external restraining system and the force is applied to the other Keywords: side of FRP reinforcement. Hence, a stable debonding process can be experimentally followed, corre- Concrete sponding to the transition between two limit states of perfect bonding and fully debonded reinforcement. Debonding Both strain gauges along the FRP reinforcement and LVDT transducers have been used. Tests have been Experimental study performed on both plates and sheets bonded to concrete specimens with different surface preparations FRP Interface before adhesive application. Shear stress–slips data have been computed from the experimental FRP