Description
Due to the shape memory effect of iron-based shape memory alloy (Fe-SMA)，it can be utilized to rapidly apply the active confinement on concrete columns. Therefore, this study presented an innovative strengthening method, which can emergency repair damaged columns. The eccentric compression test was used to investigate the relative compressive behavior of concrete columns that were individually confined by passive confinement, active confinement, and hybrid confinement. Also, the different net-spacing strips (30 mm, 40 mm, and 75 mm) and different layers of FRP strips (1 layer and 3 layers) were considered as the experimental variables. The results show that these three forms of confinement, hybrid confinement in particular, can significantly increase the load carrying capacity and lateral deformation of concrete columns. In order to choose the best ways to strengthen concrete columns, a verification calculation was lastly suggested to estimate the specimens' peak compressive stress.
