Cyclic Loading of Glued-In FRP Rods in Timber: Experimental and Analytical Study

The axial load capacity and stiffness of carbon fiber–reinforced polymer (CFRP) glass (GFRP) rods glued in timber is investigated under cyclic loading as the main design consideration for structures that experience reversal (e.g., due to wind loading). Load cycles at 20%, 40%, 60%, 80% ultimate three repetitions per cycle were considered. parameters examined are effect FRP rod, anchorage length, construction scenario. scenarios represent full contact between faces, gaps joints long-term effects viscoelastic creep) manufacturing tolerances, with other materials. GFRP exhibit 23% higher 20% lower tensile than CFRP an embedment length 5D, where D = diameter rod. tends plateau increasing bonded lengths greater 10D. Small significantly decrease compressive glued-in first varies along length. An analytical methodology presented describe bond stress transfer mechanism progressive degradation. slip values agree fairly well experimental results when debonding takes place load.