FRP-Confined Concrete Composite Retrofit System for Structural Steel Columns

Fiber-reinforced polymer (FRP)–confined concrete-steel composite columns have been recently introduced as a retrofit technique for structural steel columns. This technique involves placing a two-part FRP tube around an existing steel column and subsequently filling the void between the steel section and the FRP tube with concrete to create a composite column. The composite action occurs due to the concrete encasing the steel section and the FRP …