To enhance the usable life of existing steel buildings, a strengthening method with bonding continuous fiber reinforced plastics (FRP) plates has been developed by authors. Deep corrosion was observed in a chemical plant frame bleached in chemical atmosphere for a long term. 40% lack of beam thickness was confirmed in the frame. The frame is appointed in an explosion-protection area, and a constructer cannot use fire during rehabilitation and repair.
Therefore a strengthening method with bonding CFRP was adopted. In this paper the progress of rehabilitation by bonding CFRP plates are introduced.
Also, this paper reports the results of bending tests conducted on secondary beams in chemical plant frame before and after rehabilitation using CFRP plates.
