This book presents the development of a new method to predict load-deformation responses of reinforced concrete (RC) columns both with and without fiber reinforced polymer (FRP) jacketing under seismic loading. In the case of the flexure mechanism, the section analysis was applied considering the confinement effect of FRP jacketing. This section analysis was combined with the shear mechanism, which was modeled based on the truss mechanism. The flexure-shear models showed significant interactions due to the reduction of reinforcement secant stiffness after yielding and concrete deterioration....