Shape Effects on the Behavior of Hybrid FRP–Strengthened Rectangular RC Columns under Axial Compression

Confinement with external bonding (EB) of fiber-reinforced polymer (FRP) composites is effective for improving the performance of reinforced concrete (RC) columns under axial compression. However, EB confinement is less effective for sections with a side aspect (width/depth) ratio of more than 2. Thus, a hybrid FRP strengthening technique that combines the advantages of EB and near-surface mounting (NSM) of carbon FRP (CFRP) laminates was...