This paper describes the flexural strength and ductility of reinforced concrete bridge columns under bilateral loadings. Under a constant vertical load, the columns were subjected to bilateral loadings with four orbits (oblique direction to the strong axis, rectangular, circular and ellipse). A fiber element analysis was conducted. It was found that the deterioration of strength and ductility capacities of the columns resulted from the bilateral loadings is substantial, and that the fiber element analysis is effective to reproduce the hysteretic behavior of the columns under bilateral loadings.