- 摘 要
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(1 中州大學工程技術(shù)學院，鄭州 450044；2 鄭州大學新型建材與結(jié)構(gòu)研究中心，鄭州 450002；3 中交第二航務(wù)工程勘察設(shè)計院有限公司， 武漢 430000；4 中交第一公路工程局橋隧工程有限公司，保定074000)
［摘要］為了更好地研究由外層GFRP管、內(nèi)層鋼管及夾層混凝土三部分組成的GFRP-凝土-鋼管組合方柱的軸壓性能，進行了10個具有不同空心率的GFRP約束混凝土方柱的軸壓試驗，包括GFRP-混凝土-鋼管組合方柱、GFRP約束混凝土實心方柱及GFRP約束混凝土空心方柱。主要研究參數(shù)有截面配置、空心率、外層GFRP層數(shù)。試驗結(jié)果表明：內(nèi)部空心明顯降低了外層GFRP約束的效果及整體性能，但這種缺失完全可以通過內(nèi)部設(shè)置適宜的鋼管得到補償；GFRP-混凝土-鋼管組合方柱中的混凝土被內(nèi)層鋼管、外層GFRP很好地約束，柱的強度和延性均得到明顯提高，且其軸向壓應(yīng)力-應(yīng)變行為非常相似于相應(yīng)GFRP約束混凝土實心方柱。
［關(guān)鍵詞］GFRP; 組合柱; 方形截面; 軸向受壓
中圖分類號：TU398.9 文獻標識碼：A 文章編號：1002-848X(2014)15-0057-04
Study on axial compression performance of GFRP-concrete-steel tube combined square columns
Wang Dai1,2, Wang Yongzhi1, Duan Xiangpan3, Lei Qingrong4
(1 College of Engineering Technology, Zhongzhou University, Zhengzhou 450044, China; 2 Research Center for New Construction Material and Structure, Zhengzhou University, Zhengzhou 450002, China; 3 CCCC Second Harbor Consultants Co., Ltd., Wuhan 430000, China; 4 Bridge and Tunnel Engineering Co., Ltd. of CCCC First Highway Engineering Co., Ltd., Baoding 074000, China)
Abstract: In order to study the axial compression performance of GFRP-concrete-steel tube combined square columns composed of GFRP tube outside, steel tube inside and concrete between them, axial compression experiments of 10 GFRP-confined concrete square columns with different hollow ratios were carried out, including GFRP-concrete-steel tube combined square columns, GFRP confined concrete solid square columns and GFRP confined concrete hollow square columns. The main parameters studied included the section configuration, the hollow ratio and the thickness of the GFRP outside. Test results show that inner hollow reduces the effect of external GFRP confinement and the overall performance, but this loss of confinement effectiveness and the overall performance can almost be completely compensated through setting a suitable steel tube in the column. The concrete in GFRP-concrete-steel tube combined square columns is very effectively confined by steel tube inside and GFRP tube outside, and the strength of the GFRP-concrete-steel tube combined square columns is improved obviously as well as the ductility. The axial stress-strain behavior of GFRP-concrete-steel tube combined square columns is very similar to that of GFRP confined solid square columns.
Keywords: galss fiber reinforced polymer(GFRP); combined column; square section; axial compression
* 鄭州市科技攻關(guān)項目（112PPTGY251-6）。
作者簡介：王代，博士，講師，Email：987453942@qq.com。
參考文獻
［1］滕錦光,余濤,黃玉龍,等.FRP管-混凝土-鋼管組合柱力學性能的試驗研究和理論分析［J］.建筑鋼結(jié)構(gòu)進展, 2006,8(5):1-7.
［2］TENG J G, YU T, WONG Y L, et al. Hybrid FRP-concrete-steel tubular columns: concept and behavior［J］. Construction and Building Materials, 2007,21: 846-854.
［3］WONG Y L, YU T, TENG J G, et al. Behavior of FRP-confined concrete in annular section columns［J］. Composites Part B: Engineering, 2008,39:451-466.
［4］錢稼茹,劉明學.FRP-混凝土-鋼雙壁空心管長柱軸心受壓試驗［J］.混凝土,2006,203(9):31-34.
［5］錢稼茹,劉明學.FRP-混凝土-鋼雙壁空心管短柱軸心抗壓試驗研究［J］.建筑結(jié)構(gòu)學報,2008,29(2):104-113.
［6］劉明學,錢稼茹. FRP-混凝土-鋼雙壁空心管的截面彎矩曲率全曲線［J］.清華大學學報：自然科學版,2007,47(12): 2105-2110.
［7］錢稼茹,劉明學.FRP-混凝土-鋼雙壁空心管柱抗震性能試驗［J］.土木工程學報，2008,41(3):29-36.
［8］張冰. FRP管-高強混凝土-鋼管組合短柱軸壓性能試驗研究［D］. 哈爾濱：哈爾濱工業(yè)大學，2009.
［9］吳剛,呂志濤.纖維增強復(fù)合材料（FRP）約束混凝土矩形柱應(yīng)力-應(yīng)變關(guān)系的研究［J］.建筑結(jié)構(gòu)學報, 2004,25(3):99-106.
