Repair with carbon fibre reinforced polymer for steel pipe having partial loss of area

In this paper, the effects of reinforcement with CFRP for steel pipes having partially cut-out are investigated through axial loading tests. Firstly, the axial compression and tensile tests of steel pipes having partial cut-out are carried out. Secondly, the quantitative behaviour on axial stiffness, strength, yield stress and stress concentration are made clear. Finally, it is confirmed that axial stiffness and yield stress increases while using CFRP even if it is adhesively bonded to steel pipes on the outerside section. It has been suggested that the present reinforcing method provides the reasonable and useful procedure for reinforcing corroded steel pipe members under axial compression.