Abstract
Carbon fiber reinforced polymer, CFRP, plates bonding method for cracked steel structures is one of the new repair methods. In this study, to evaluate the extended bending fatigue life of out-of-plane gusset joint by plate bonding, stress intensity factor (SIF) of cracked steel plate and that of cracked out-of-plane gusset joint by plate bonding was calculated by finite element and simple calculation based on linear fracture mechanics. Furthermore, bending fatigue tests of out-of-plane gusset joint were carried out, to reveal the extended bending fatigue life by bonding CFRP plates. Finally, crack propagation analysis was conducted and the extended bending fatigue life by bonding CFRP plates was estimated. As the results of the crack propagation analysis, the estimated fatigue life of cracked out-of-plane gusset joint repaired by bonding CFRP plates was good agreed with the fatigue life given by the tests.
