Study on Basic Ories and Longtime Behavior of Substation Concrete Framework Structures Strengthened by Fiber Reinforced Polymers

Early transformer substation outdoor trusses are all structured in reinforced concrete. Du to the structure feature of the concrete, technical limit and construction quality in the old days, with years' operation, corrosion of craze and peeling wildly appears on the surface concrete of these trusses which seriously affects transformer substation's operation and safety. Lately years,more substation framework are rein forced by FRP. In this Paper, a range of tests about the durability of FRP strengthening structures with wet-condition have been accomplished, and a comprehensive control strategy have been obtained.