부산대학교 도서관

The use of carbon-fiber-reinforced polymer (CFRP) as a strengthening material for aging-steel-structural members in seismic retrofitting has become an increasingly important area of interest. This study conducted monotonic tension loading and cyclic loading tests on tension diagonal members of steel truss bridges to evaluate the effectiveness of CFRP-retrofitting methods. The CFRP-retrofitting methods involved varying the bonding range of the CFRP sheets on the inside and outside of the flanges of the specimens. The test results indicated that retrofitting methods which bonded the CFRP sheets on both sides of the flanges significantly improved the load-carrying capacity and yield strength of the retrofitted diagonal members. However, the load-carrying capacity of the retrofitted diagonal members suddenly reduced after the local buckling of the flanges and rupture failure of the CFRP sheets occurred.