- 摘 要
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[摘要]扼要敘述碳纖維布加固鋁合金方管簡支梁受壓區(qū)應(yīng)變變化規(guī)律,可知用碳纖維布對鋁合金方管梁進行加固,可以提高其極限承載力,抑制梁跨中撓度的發(fā)展。同時在本次試驗中驗證了“拐點”即荷載-跨中撓度曲線由直變曲之際,“零點”即鋁合金梁側(cè)即將發(fā)生屈曲現(xiàn)象的前兆的觀點。
[關(guān)鍵詞]碳纖維布;鋁合金方管;應(yīng)變;撓度;屈曲
中圖分類號:TU395文獻標(biāo)識碼:A文章編號:1002-848X(2011)12-0125-04
Bending experiment and analysis of aluminum alloy square tube beam strengthened by CFRP:part Ⅱ
Liu Tong1, Zhang Jihong2, Liu Youzhong3, Ai Jun4, Li Feiyue5(1 College of Civil Engineering, Yancheng Institute of Technology, Yancheng 224051,China; 2 Construction Department, Yancheng Bureau of Construction,Yancheng 224000,China;3 Construction Group Limited Company of Jiangsu Guofeng,Yancheng 224000,China; 4 Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 10000,China; 5 Architectural Design Limited Company of Xiamen Fanhua,Xiamen 361004,China)
Abstract:The changing law of compression zone strain on the CFRP aluminum alloy square tube simply supported beam were briefly described. The results of this experiment show that the reinforcement of carbon fiber sheet of aluminum alloy square tube beam, the ultimate bearing capacity can be improved, and the mid-span deflection of beam can be inhibited from expanding. The experiment verifies that the “inflection point” is load and mid-span deflection curve from linear to curve point and “zero point” is aluminum alloy beam side which will soon occur the precursor of buckling phenomenon.
Keywords:CFRP; aluminum alloy square tube; strain; deflection; buckling
*江蘇省建筑業(yè)科研計劃項目(JGJH2009-19)。
作者簡介:劉桐,碩士,副教授, Email:liutongpc@yahoo.com. cn。
參考文獻
[1]劉桐,張繼紅,劉友忠. 碳纖維布加固鋁合金方管試驗研究與有限元分析[J].施工技術(shù),2010,39(11):30-33.
[2]劉桐,張繼紅,劉友忠,等. 碳纖維布加固鋁合金方管梁受彎試驗研究(一)[J]. 建筑結(jié)構(gòu),2011,41(10):120-122,129