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.
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Foundation item: Projects(51178174, 51308201) supported by the National Natural Science Foundation of China
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Qin, P., Tan, Y. & Xiao, Y. Low cyclic fatigue performance of concrete-filled steel tube columns. J. Cent. South Univ. 22, 4035–4042 (2015). https://doi.org/10.1007/s11771-015-2947-2
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DOI: https://doi.org/10.1007/s11771-015-2947-2