Low cyclic fatigue performance of concrete-filled steel tube columns
来源期刊：中南大学学报(英文版)2015年第10期
论文作者：QIN Peng TAN Yang XIAO Yan
文章页码：4035 - 4042
Key words：concrete-filled steel tubular columns; low cyclic fatigue; seismic performance; failure mode
Abstract: Eight concrete-filled steel tubular (CFT) columns were tested subjected to cyclic loading under constant axial load. Experimental parameters included axial compression ratio, loading sequences, and strength of concrete and steel. The seismic performance of CFT columns and failure modes were analyzed. The test results show that different axial load ratios and loading sequences have effects on the load carrying capacity, ductility and energy dissipation capacity of CFT columns, as well as the failure modes of the CFT columns.The failure pattern can be categorized into two types: local buckling failure of steel tube in compression zone, and low cycle fatigue tearing rupture failure of steel tube. The seismic behavior was evaluated through the energy index obtained from each cycle.
QIN Peng(秦鹏), TAN Yang(谭杨), XIAO Yan(肖岩)
(College of Civil Engineering, Hunan University, Changsha 410082,China)
Abstract:Eight concrete-filled steel tubular (CFT) columns were tested subjected to cyclic loading under constant axial load. Experimental parameters included axial compression ratio, loading sequences, and strength of concrete and steel. The seismic performance of CFT columns and failure modes were analyzed. The test results show that different axial load ratios and loading sequences have effects on the load carrying capacity, ductility and energy dissipation capacity of CFT columns, as well as the failure modes of the CFT columns.The failure pattern can be categorized into two types: local buckling failure of steel tube in compression zone, and low cycle fatigue tearing rupture failure of steel tube. The seismic behavior was evaluated through the energy index obtained from each cycle.
Key words:concrete-filled steel tubular columns; low cyclic fatigue; seismic performance; failure mode
