When RC columns reach near-collapse and undergo axial shortening following shear failure, some of axial load sustained by the columns transfer to neighboring columns and axial load of the columns becomes lower than the initial one. This study was intended to examine the effect of the decreased axial load on the collapse behavior. Full-scale column specimens with shear failure mode were tested under decreased axial load or constant axial load until they collapse. The effect of varied rates of the axial load decrease on the column collapse drift is studied and the comparison of computed collapse drifts and observed ones are also discussed.