부산대학교 도서관

Owing to seismic, wave, or wind actions, tubular joints used in onshore and off shore civil infrastructures may require retrofi tting to withstand both static and cyclic loadings. In the present study, bearing capacities, failure modes, and ductilities of damaged tubular T-joints retrofi tted with carbon fi ber reinforced polymer (CFRP) were investigated. Two-step loading was applied: fi rst, a pre-determined load was applied to induce chord deformation; this was followed by unloading and CFRP retrofi tting. Subsequently, the specimens were reloaded to failure. Results showed that the retrofi tted specimens exhibited a maximum capacity similar to and a plastic deformation slightly larger than that of the bare specimen when these subjected to static loading; the retrofi tted specimens, which were not severely damaged, exhibited a higher compressive ductility index than that of the bare specimen when these subjected to cyclic loading.