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（1 天津大學(xué)建筑學(xué)院， 天津 300072； 2 天津大學(xué)建筑工程學(xué)院， 天津 300072）

［摘要］對(duì)L形鋼板連接式方鋼管混凝土組合異形柱進(jìn)行了雙向壓彎試驗(yàn)，分析了在雙向壓彎荷載作用下偏心距的變化對(duì)L形異形柱的豎向應(yīng)變、側(cè)向撓度、各單肢柱柱中截面的橫向應(yīng)變以及連接鋼板的豎向應(yīng)變等參數(shù)的影響。結(jié)果表明，在雙向壓彎荷載作用下，L形異形柱的極限承載力隨著偏心距的增大而降低；連接鋼板對(duì)各單肢柱的約束作用較強(qiáng)，保證了L形異形柱的整體性，各單肢柱可以協(xié)同變形。研究結(jié)果為后續(xù)L形鋼板連接式方鋼管混凝土組合異形柱其他受力性能的研究提供了參考。

［關(guān)鍵詞］L形異形柱； 方鋼管混凝土柱； 雙向壓彎試驗(yàn)； 偏心距

中圖分類號(hào)：TU398文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)06-0082-05

Experimental study on biaxial eccentric compression stability of L-shaped special-shaped columns composed of concrete-filled square steel tube connected by steel plates

Zhou Ting1, Xu Minyang2, Chen Zhihua2, Li Yanbo2

(1 School of Architecture， Tianjin University ，Tianjin 300072，  China; 2 School of Civil Engineering， Tianjin University， Tianjin 300072， China)

Abstract:Biaxial eccentric compression experiment was conducted on L-shaped special-shaped columns composed of concrete-filled square steel tube connected by steel plates (LCFST columns). Under biaxial eccentric compression loading, the effects of eccentric distances on the vertical strain, lateral deflection, transverse strain of the middle height  cross section of the single mono column and the vertical strain of the connected steel plate of the LCFST columns were studied. The results show that the ultimate bearing capacity of LCFST columns decreases with the increase of eccentric distances under biaxial eccentric compression and bending load. The connection plate has strong constraint on the single mono columns, which ensures the integrity of the LCFST columns, and the single mono columns can cooperate to deform. The research results provide a reference for the study of mechanical performance of other LCFST columns.

Keywords:L-shaped special-shaped column; concrete-filled square steel tubular column; biaxial eccentric compression experiment; eccentric distance

*國家重點(diǎn)研發(fā)計(jì)劃子課題（2017YFC070380204）,住建部科技項(xiàng)目（2017-K9-038）。

作者簡(jiǎn)介：周婷，博士，副教授，Email:zhouting1126@126.com。