The restoring force was stable between 1.25% and 3.75% drift with a flexural strength corresponding to a lateral load of 107.9 kN at 2.5% drift. Subsequently, the flexural restoring force started to deteriorate as a result of the compression failure of cover concrete and the buckling of longitudinal bars, and the column lost the lateral confinement and its restoring force reached 85% of its maximum strength. This is the typical progress of the damage in the flexural failure of cantilever column