SEISMIC BEHAVIOR OF LARGE-SCALE REINFORCED CONCRETE COLUMNS WITH DIFFERENT AXIAL LOAD RATIO

Four 700mm × 700mm reinforced concrete columns were tested under monotonic horizontal loading and low cycle reversed loading with high axial load ratio． Their bearing capacity，failure characteristic and hysteretic behavior were discussed． The axial load ratio and low cycle reversed loading and their influence on bearing capacity， deformation and energy dissipation were analyzed． The results indicate that skeleton curve of specimen declines slightly，ductility and ultimate deformation are small，and the bearing capacity and energy dissipation increase as axial load ratio increases． Strength degradation of specimen under low cycle reversed loading is rapid relative to the specimen under monotonic loading，and there is also less ultimate deformation．