T形截面方钢管混凝土组合异形柱压弯性能研究*
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（新疆大学建筑工程学院，乌鲁木齐 830047）［摘要］通过压弯试验，对T形截面方钢管混凝土组合异形柱的压弯性能进行研究。试验结果表明，试件最终破坏形式为整体弯曲型失稳破坏。结合压弯试验进行非线性有限元模拟，有限元模型的破坏形式、荷载-位移曲线和极限承载力等均与试验结果吻合较好，验证了有限元分析的可行性。利用有限元方法分析柱高度、钢材强度和混凝土强度对异形柱压弯承载力的影响，分析表明，钢材强度对异形柱压弯承载力影响较大。［关键词］方钢管混凝土; 组合异形柱; T形截面; 压弯试验; 有限元分析中图分类号：TU375.3 文献标识码：A 文章编号：1002-848X(2014)21-0027-05Study on mechanical properties of T-shaped column composed of concrete-filled square steel tubes under eccentric compressionZhang Guangtai, Yao Yanan, Rong Bin, Li Fengbin(College of Architectural and Civil Engineering, Xinjiang University, Urumqi 830047, China)Abstract: Mechanical properties of T-shaped column composed of concrete-filled square steel tubes under eccentric compression were investigated by eccentric compression experiment．Experimental results show that the failure mode of the eccentric compression column is flexural bucking of the whole specimen. Nonlinear finite element analysis was also adopted. The predicted results of the failure mode, the load-displacement curve and the ultimate load-bearing capacity are in good agreement with the experimental result．Feasibility of finite element analysis was proved．Influences of height，steel strength and concrete strength on the bending bearing capacity of special-shaped column were got by finite element analysis. Analysis shows that the steel strength has great influence on the bending bearing capacity of special-shaped column.Keywords:concrete-filled square steel tube; special-shaped composite column; T-shaped section; eccentric compression experiment; finite element analysis*新疆维吾尔自治区自然科学基金（201233146-4）。作者简介：张广泰，教授，Email: zgtlxh@126.com。参考文献［1］韩林海．现代钢管混凝土结构［M］．北京:科学出版社，2000．［2］杜国锋，余思平，宋 鑫，等. 钢骨-T形钢管混凝土短柱轴心受压试验研究［J］．建筑结构，2012，42（2）：144-152．［3］李振宇．十字形截面方钢管混凝土组合异形柱承载力研究［D］．天津：天津大学，2006.［4］荣 彬，陈志华，周 婷．L形方钢管混凝土组合异形短柱的轴压强度研究［J］．工业建筑，2009，39(11)：104-107．［5］陈志华，荣 彬．L形方钢管混凝土组合异形柱的轴压稳定性研究［J］．建筑结构，2009，39(6)：39-43．［6］CHEN ZHIHUA, RONG BIN, FAFITIS APOSTOLOS. Axial compression stability of a crisscross section column composed of concrete-filled square steel tubes ［J］． Mechanics of Advanced Materials and Structures, 2009, 4(10)：1787-1799．［7］ZHOU TING, CHEN ZHIHUA, LIU HONGBO．Seismic behavior of special shaped column composed of concrete filled steel tubes［J］.Journal of Constructional Steel Research, 2012, 75：131-141．
