Abstract
To investigate the seismic behavior of RC columns reinforced with fine grain steel bars, four rectangle cross-section HRBF400 RC columns bending low-cycle reversed loading experiment were made. Effects of reinforcement ratio, axial compression ratio, and stirrup ratio on the seismic performance of RC columns were analyzed. Characteristic of hysteretic curve and skeleton curve were studied, and characteristic value and displacement ductility of each component were calculated. The results showed HRBF400 RC columns have good seismic behavior. With the increasing of reinforcement ratio, yield load, peak load, and ductility have correspondingly improved. Columns of high-compression ratio has high peak load and yield load, but its skeleton curve after peak load decreased fast and has low ductility. Columns of low compression ratio has low peak load and low load, but its skeleton curve after peak load decreased gently and has good ductility. Seismic behavior and ductility of RC columns were improved with the increasing of stirrup ratio.
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