(1 贵州大学土木工程学院,  贵阳 550025; 2 贵州理工学院, 贵阳 550003; 3 中国电建集团贵阳勘测设计研究院有限公司, 贵阳 550081; 4 中国人民解放军陆军勤务学院军事设施系，  重庆 401331；  5 贵州建工集团有限公司, 贵阳 550003)

［摘要］对4个型钢区域约束混凝土(SRCC)柱、1个普通井字箍约束混凝土(NCC)柱及1个钢筋区域约束混凝土(RCC)柱进行拟静力往复荷载对比试验，其中型钢区域约束混凝土柱设计轴压比分别为1.1，1.3及1.6，普通井字箍约束混凝土柱及钢筋区域约束混凝土柱设计轴压比为1.1，而型钢区域约束混凝土柱在1.1轴压比时，分别设置两种不同间距（70，90mm）的箍筋。对各试件滞回曲线、骨架曲线、承载力、延性和耗能性能进行分析。结果表明型钢区域约束混凝土柱受力均匀，能有效抑制贯通斜裂缝的发生，避免脆性的剪切破坏； 在相同轴压比下，箍筋间距的增大使型钢区域约束混凝土柱的抗震性能降低；随轴压比的提高，型钢区域约束混凝土柱的抗剪承载力、延性、变形能力和耗能能力均增强，且明显高于普通井字箍约束混凝土柱和钢筋区域约束混凝土柱；型钢区域约束混凝土柱在高轴压比下具有良好的力学性能和抗震性能，宜加以广泛推广使用。

［关键词］型钢区域约束混凝土； 抗震性能； 轴压比； 箍筋间距； 承载力

中图分类号：TU375-3， TU317-1文献标识码：A文章编号：1002-848X(2021)02-0085-07

Experimental research on seismic behavior of steel regional confined concrete columns

ZHANG Qi1, CAO Xinming1, XIAO Liping2, CHANG Ya3, MU Rui4, CAO Jing5

(1 College of Civil Engineering, Guizhou University, Guiyang 550025, China; 2 Guizhou Institute of Technology, Guiyang 550003, China; 3 Power China Guiyang Engineering Corporation Limited, Guiyang 550081, China; 4 Department of Architectural Engineering, Army Logistics University of PLA, Chongqing 401331, China；5 Guizhou Construction Engineering Group Co., Ltd., Guiyang 550003, China)

Abstract:Quasi-static experiment of four section steel regional confined concrete (SRCC) columns was conducted under low cyclic loading, compared with one well-shaped-stirrup normal confined concrete (NCC) column and one steel regional confined concrete (RCC) column. Axial compression ratios of 1.1, 1.3 and 1.6 were applied in SRCC columns while 1.1 was selected in NCC column and RCC column. Stirrup spacing of 70mm and 90mm were set up when SRCC column remained the axial compression ratio of 1.1. The hysteresis curves, skeleton curves, bearing capacity, ductility and energy dissipation of all specimens were analyzed. The results indicate that SRCC columns exhibit uniform stress, which restrain the occurrence of penetrating shear crack effectively and avoid fragile shear failure. The increase of stirrup spacing under the same axial compression results in the bad seismic behavior of SRCC columns. With the increase of axial compression ratio, the shear bearing capacity, ductility, deformation ability and energy dissipation ability of SRCC columns are increased, which is much higher than NCC column and RCC column. SRCC columns have good mechanical and seismic behavior under high axial compression ratio and it is reliable to be applied widely.

Keywords:steel regional confined concrete; seismic behavior; axial compression ratio; stirrup spacing; bearing capacity

*区域约束混凝土圆柱抗震性能试验研究（黔科合LH字〔2015〕7085号）。

作者简介：张琪，硕士，助教，Email：568264678@qq.com； 通信作者：曹新明，硕士，教授，Email：397246997@qq.com。