带约束拉杆矩形钢管混凝土短柱偏压性能的试验研究

EXPERIMENTAL STUDY ON ECCENTRIC-LOADED BEHAVIOR OF RECTANGULAR CFT STUB COLUMNS WITH BINDING BARS

对7个带约束拉杆和2个不设约束拉杆矩形钢管混凝土短柱进行偏心受压试验研究,主要研究偏心率、约束拉杆水平间距对矩形钢管混凝土短柱偏压性能的影响。试验研究结果表明,在偏心压力作用下,约束拉杆的设置有助于提高矩形钢管混凝土短柱的延性,延迟钢管的局部屈曲。带约束拉杆矩形钢管混凝土柱的偏压承载力随偏心率的增大而减小。在相同偏心率下,试件延性随拉杆水平间距减小而增大。

The experiments of seven rectangular CFT stub columns with binding bars and two without binding bars eccentrically loaded in compression were carried out with the main parameters such as eccentricity ratio and binding bar horizontal spacing. Experimental results indicate that binding bars increase the ductility of rectangular columns under eccentric load and delay the local buckling of steel tubes. The ultimate capacity decreases with load eccentricity ratios increasing. When load eccentricity ratios are the same, the ductility increases with binding bar horizontal spacing decreasing.