AN EXPERIMENTAL STUDY ON STRENGTH OF THIN-WALLED STEEL BOX BEAM-COLUMNS UNDER REPETITIVE BENDING

This study presents an experimental investigation on the strength of thin-walled steel box beam-columns of the T-shaped steel bridge piers under constant axial thrust and repetitive bending moment simulating earthquake excitations being applied, however, in the static condition. The steel box beam-column specimens had flanges with or without the longitudinal stiffeners. From the tests, the elasto-plastic behavior, the ultimate strength, the deteriorating and hysteretic properties are clarified. The effects such as the rigidity of the flange stiffeners, the magnitude of the axial force on the load-carrying capacity and the failure types of the specimens are investigated.