Complex　flexural,　shear　and　torsion　failure　of　reinforced　concrete　(RC)　bridge　columns　for　skewed　and　curved　bridges　will　be　taken　place　during　seismic　excitation.　An　experimental　investigation　on　the　seismic　performance　of　RC　bridge　columns　subjected　to　combined　cyclic　bending　and　torsional　loading　was　carried　out.　Five　circular　RC　bridge　columns　test　models　were　tested　under　various　loading　conditions:　cyclic　uniaxial　bending,　cyclic　torsion,　and　combined　cyclic　torsion　and　cyclic　uniaxial　bending.　Several　combinations　of　cyclic　bending　and　cyclic　torsion　were　applied　to　evaluate　the　interaction　between　torsion　and　flexural　capacity　of　columns.　The　result　reveals　that　the　flexural　capacity　in　flexure　decreases　with　the　torsion　increases,　and　the　torsional　capacity　in　torsion　decreases　with　the　bending　moment　increases　under　combined　bending　and　torsion,　and　the　damage　tend　to　occur　upward　outside　the　flexural　plastic　hinge　region　with　the　level　of　applied　cyclic　torsion　increases.