圓鋼管再生混凝土軸壓短柱對(duì)比試驗(yàn)研究*
黃宏1,2，郭曉宇1,2，陳夢(mèng)成1
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（1 華東交通大學(xué)土木建筑學(xué)院, 南昌 330013； 2 江西省建筑過程模擬與控制重點(diǎn)實(shí)驗(yàn)室, 南昌 330013）
［摘要］對(duì)不同截面形式和不同混凝土類型的6根圓鋼管混凝土試件進(jìn)行試驗(yàn)研究，并對(duì)其軸力-縱向應(yīng)變?nèi)^程進(jìn)行模擬，其中截面形式有圓實(shí)心、圓套圓中空夾層、圓套方中空夾層3種，混凝土類型包括普通混凝土和再生混凝土（再生粗骨料取代率為50%）兩類。結(jié)果表明：截面形式對(duì)圓鋼管再生混凝土試件的彈性模量、軸壓強(qiáng)度和后期延性有一定影響；在達(dá)到極限承載力之前，兩種混凝土類型的圓鋼管混凝土試件的軸壓剛度及外鋼管的橫向應(yīng)變發(fā)展規(guī)律基本相同；在達(dá)到極限承載力之后，圓鋼管再生混凝土試件的延性和后期承載能力均不如相應(yīng)的圓鋼管普通混凝土試件；有限元計(jì)算得到的試件的極限承載力和前期剛度與試驗(yàn)結(jié)果吻合較好。［關(guān)鍵詞］圓鋼管再生混凝土; 軸壓試驗(yàn); 短柱中圖分類號(hào)：TU398 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2016)04-0034-06
Comparative experimental research on recycled aggregate concrete filled steel tubular columns subjected to axial compressionHuang Hong1,2, Guo Xiaoyu1,2, Chen Mengcheng1(1 School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China; 2 Jiangxi Key Laboratory of Control and Simulation of Construction Process, Nanchang 330013, China)Abstract:A comparative experimental research was conducted to investigate the mechanical properties of 6 concrete filled steel tubular (CFST) columns with different types of cross sections and concrete types under axial compression. The whole process of axial force-longitudinal strain was simulated. The section types include CFST with circular section, concrete filled double-skin steel tube (CFDST) with circular hollow section (CHS) as both inner and outer tubes and CFDST with square hollow section (SHS) as the inner tube and CHS as the outer tube. Two types of concrete were normal concrete and recycled aggregate concrete, and the replacement ratio of recycled coarse aggregates was 50%. The research results show that the section type has some effect on elastic modulus, axial compressive strength and ductility of recycled aggregate concrete filled steel tubular (RACFST) columns. Before the load reaches the ultimate load, the axial stiffness and the regulation of development of lateral strain of outer tubes of CFST and RACFST are roughly similar. After the load reaches the ultimate load, the ductility and the bearing capacity of RACFST are not as good as those of CFST columns with the same section type. The bearing capacity and axial stiffness in the early stage calculated by the finite element method were in good agreement with those measured by test. The calculated results and test results were verification to each other.Keywords:recycled aggregate concrete filled steel tube; axial compression test; stub column
*國(guó)家自然科學(xué)基金項(xiàng)目(51378206,51008122)，江西省青年科學(xué)基金計(jì)劃(20143ACB21020)，江西省青年科學(xué)家培養(yǎng)對(duì)象(20133BCB23015)。作者簡(jiǎn)介：黃宏，博士，教授，碩士生導(dǎo)師，Email:huanghong1977@foxmail.com。
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