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(1 貴州大學(xué)土木工程學(xué)院, 貴陽 550025; 2 貴州理工學(xué)院, 貴陽 550003; 3 中國電建集團貴陽勘測設(shè)計研究院有限公司, 貴陽 550081; 4 中國人民解放軍陸軍勤務(wù)學(xué)院軍事設(shè)施系， 重慶 401331； 5 貴州建工集團有限公司, 貴陽 550003)
［摘要］對4個型鋼區(qū)域約束混凝土(SRCC)柱、1個普通井字箍約束混凝土(NCC)柱及1個鋼筋區(qū)域約束混凝土(RCC)柱進行擬靜力往復(fù)荷載對比試驗，其中型鋼區(qū)域約束混凝土柱設(shè)計軸壓比分別為1.1，1.3及1.6，普通井字箍約束混凝土柱及鋼筋區(qū)域約束混凝土柱設(shè)計軸壓比為1.1，而型鋼區(qū)域約束混凝土柱在1.1軸壓比時，分別設(shè)置兩種不同間距（70，90mm）的箍筋。對各試件滯回曲線、骨架曲線、承載力、延性和耗能性能進行分析。結(jié)果表明型鋼區(qū)域約束混凝土柱受力均勻，能有效抑制貫通斜裂縫的發(fā)生，避免脆性的剪切破壞； 在相同軸壓比下，箍筋間距的增大使型鋼區(qū)域約束混凝土柱的抗震性能降低；隨軸壓比的提高，型鋼區(qū)域約束混凝土柱的抗剪承載力、延性、變形能力和耗能能力均增強，且明顯高于普通井字箍約束混凝土柱和鋼筋區(qū)域約束混凝土柱；型鋼區(qū)域約束混凝土柱在高軸壓比下具有良好的力學(xué)性能和抗震性能，宜加以廣泛推廣使用。
［關(guān)鍵詞］型鋼區(qū)域約束混凝土； 抗震性能； 軸壓比； 箍筋間距； 承載力
中圖分類號：TU375-3， TU317-1文獻標識碼：A文章編號：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
*區(qū)域約束混凝土圓柱抗震性能試驗研究（黔科合LH字〔2015〕7085號）。
作者簡介：張琪，碩士，助教，Email：568264678@qq.com； 通信作者：曹新明，碩士，教授，Email：397246997@qq.com。
