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To investigate the cyclic load response of rectangular hollow Reinforced Concrete (RC) bridge columns, four hollow bridge column specimens were tested under constant axial load and cyclic uniaxial or biaxial bending. The experimental results showed that all tested specimens failed in the flexural failure mode and their ultimate performance was dominated by flexural capacity, which was represented by the rupture/buckling of tensile longitudinal rebar at the bottom of the bridge columns. Biaxial force and displacement hysteresis loops showed significant stiffness and strength degradations. Coupling interaction effect of both directions severely decrease lateral load capacity and the structural seismic resistance. The hollow RC rectangular bridge columns with configurations of lateral reinforcement in this paper have excellent performance under bi-directional earthquake excitations. © 2017 Taylor & Francis Group, London.
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