In this paper, the effects of repair with carbon fiber reinforced polymer (CFRP) for steel pipes having partially cut-out are investigated through axial loading tests. Firstly, the axial compression and tensile tests of steel pipes are carried out. Secondly, the effects on axial stiffness, strength, yield stress and stress concentration are made clear. Finally, it is confirmed that axial stiffness and yield stress significantly increase using CFRP even if it is adhesively bonded to steel pipes on the outside surface. It would be suggested that the present reinforcing method provides the reasonable and useful procedure for corroded steel pipe members.
