EXPERIMENTAL STUDY ON ASEISMIC PERFORMANCE OF SOLID STEEL REINFORCED CONCRETE T-SHAPED COLUMN

In order to investigate the aseismic performance of the solid steel reinforced concrete T-shaped column, ten specimens were tested under horizontal loading, considering various loading procedures, axial compression ratios, and steel ratios. The failure process and patterns were observed. The mechanical behaviors were analyzed, such as load-displacement curves, drift angle, ductility, loading capacity, stiffness and energy dissipation. Test results show that:bending failure occurred for all specimens, and the failure pattern is different when the load was applied to the specimen according to different loading procedures. The hysteretic loops are in a plump-shape. The maximum drift angle is between 1/36 and 1/9, the displacement ductility coefficient is between 3.97 and 12.11, and the equivalent viscous damping coefficient is about 0.319 to 0.374 as the specimen failed, indicating good capacity of deformation and energy dissipation. With the increase of the number of cyclic loading and the axial compression ratio, the ductility of the specimen is reduced, and the speed of the strength and stiffness degradation tend to fast. With the increase of steel ratio, the ductility of the specimen is improved, and the speed of the strength and stiffness degradation tend to slow.