T形截面方鋼管混凝土組合異形柱壓彎性能研究*
張廣泰，姚亞楠，榮彬，李鳳彬
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（新疆大學(xué)建筑工程學(xué)院，烏魯木齊 830047）［摘要］通過壓彎試驗(yàn)，對(duì)T形截面方鋼管混凝土組合異形柱的壓彎性能進(jìn)行研究。試驗(yàn)結(jié)果表明，試件最終破壞形式為整體彎曲型失穩(wěn)破壞。結(jié)合壓彎試驗(yàn)進(jìn)行非線性有限元模擬，有限元模型的破壞形式、荷載-位移曲線和極限承載力等均與試驗(yàn)結(jié)果吻合較好，驗(yàn)證了有限元分析的可行性。利用有限元方法分析柱高度、鋼材強(qiáng)度和混凝土強(qiáng)度對(duì)異形柱壓彎承載力的影響，分析表明，鋼材強(qiáng)度對(duì)異形柱壓彎承載力影響較大。［關(guān)鍵詞］方鋼管混凝土; 組合異形柱; T形截面; 壓彎試驗(yàn); 有限元分析中圖分類號(hào)：TU375.3 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：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*新疆維吾爾自治區(qū)自然科學(xué)基金（201233146-4）。作者簡(jiǎn)介：張廣泰，教授，Email: zgtlxh@126.com。參考文獻(xiàn)［1］韓林海．現(xiàn)代鋼管混凝土結(jié)構(gòu)［M］．北京:科學(xué)出版社，2000．［2］杜國(guó)鋒，余思平，宋 鑫，等. 鋼骨-T形鋼管混凝土短柱軸心受壓試驗(yàn)研究［J］．建筑結(jié)構(gòu)，2012，42（2）：144-152．［3］李振宇．十字形截面方鋼管混凝土組合異形柱承載力研究［D］．天津：天津大學(xué)，2006.［4］榮 彬，陳志華，周 婷．L形方鋼管混凝土組合異形短柱的軸壓強(qiáng)度研究［J］．工業(yè)建筑，2009，39(11)：104-107．［5］陳志華，榮 彬．L形方鋼管混凝土組合異形柱的軸壓穩(wěn)定性研究［J］．建筑結(jié)構(gòu)，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．
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