部分剪力連接預(yù)應(yīng)力連續(xù)組合梁抗彎性能試驗(yàn)研究
胡少偉,龔洪波
- 摘 要
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胡少偉,龔洪波(南京水利科學(xué)研究院, 南京 210024)[摘要]為探究剪力連接程度對(duì)預(yù)應(yīng)力鋼混凝土連續(xù)組合梁的荷載跨中撓度特征、沿梁縱向的相對(duì)滑移分布規(guī)律、沿截面高度的應(yīng)變分布、預(yù)應(yīng)力增量變化以及連續(xù)梁的內(nèi)力重分布過程、破壞機(jī)理與極限強(qiáng)度等的影響,進(jìn)行了4根預(yù)應(yīng)力鋼混凝土連續(xù)組合梁的靜載全過程試驗(yàn)研究。研究結(jié)果表明,隨著剪力連接程度的降低,變形及界面滑移明顯增大,承載能力有所降低,但降低程度小于剪力連接的降低程度,2根剪力連接程度系數(shù)為07的組合梁承載力比完全剪力連接組合梁均降低不到10%,隨著剪力連接程度的降低連續(xù)梁相應(yīng)彎矩的調(diào)幅值也會(huì)降低。[關(guān)鍵詞]部分剪力連接; 預(yù)應(yīng)力; 連續(xù)組合梁; 抗彎性能; 試驗(yàn)研究中圖分類號(hào):TU398+.7文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1002848X(2013)06006404Experimental study on bending behaviors of prestressed steel concrete continuouscomposite beams with partial shear connectionHu Shaowei, Gong Hongbo(Nanjing Hydraulic Research Institute, Nanjing 210024, China)Abstract:The static load of four prestressed steel concrete continuous composite beams was tested in order to research the effects of the degree of shear connection on the bending behaviors of prestressed steel concrete continuous composite beams, such as the loaddeflection characteristic, the loadslip along the span of beams, the strain distribution along the height of composite section, the loadstress increment of prestressed tendons, the interal force redistribution, the failure mode and the ultimate strength of the structure. The research results show that the deformation and interface slip increase and the bending capacity decreases with the reduction of shear connection, but it is less than the direct proportion of the reduction of shear connection. The bending capacity of two composite beams with the shear connection coefficient of 07 was less than 10 percent compared with the full shear connection. The bending moment modulation value of continuous composite beams also decreases with the reduction of shear connection.Keywords:partial shear connection; prestressed; continuous composite beam; bending behavior; experimental study*中央級(jí)公益性科研院所基本科研業(yè)務(wù)費(fèi)重大項(xiàng)目(Y410006)。作者簡介:胡少偉,博士生導(dǎo)師,教授級(jí)高級(jí)工程師,Email: hushaowei@nhri.cn。參考文獻(xiàn)[1]Eurocode 4 Design of composite steel and concrete structures part 11: general rules and rules for buildings[S].London:2004.[2]日本建筑學(xué)會(huì).鋼骨鋼筋混凝土結(jié)構(gòu)計(jì)算標(biāo)準(zhǔn)及解說[M]. 馮乃謙,葉列平,陳延年,等,譯. 北京:原子能出版社,1997.[3]朱聘儒.鋼混凝土組合梁設(shè)計(jì)原理[M].北京:中國建筑工業(yè)出版社,1989.[4]胡少偉.組合梁抗扭分析與設(shè)計(jì)[M].北京:人民交通出版社,2005:1214.[5]聶建國.鋼混凝土組合梁結(jié)構(gòu)試驗(yàn)、理論與應(yīng)用[M].北京:科學(xué)出版社,2005.[6]胡少偉, 葉祥飛.部分剪力連接預(yù)應(yīng)力組合箱梁受彎性能試驗(yàn)研究[J].建筑結(jié)構(gòu)學(xué)報(bào), 2011, 32(10):153158.[7]房貞政,鄭則群.不同剪力連接程度預(yù)應(yīng)力鋼混凝土組合連續(xù)梁的試驗(yàn)研究[J].福州大學(xué)學(xué)報(bào):自然科學(xué)版, 2002, 30(3):343348.[8]胡漢林.預(yù)應(yīng)力組合梁結(jié)構(gòu)抗彎性能試驗(yàn)研究與理論分析[D].南京:南京水利科學(xué)研究院,2010.[9]宗周紅,鄭則群,房貞政,等.體外預(yù)應(yīng)力鋼混凝土組合連續(xù)梁試驗(yàn)研究[J].中國公路學(xué)報(bào),2002, 15(1):4449.[10]劉長貴,史綱.預(yù)應(yīng)力組合連續(xù)梁實(shí)驗(yàn)研究及分析[J].中國水運(yùn),2008,8(4):9798.[11]胡少偉,聶建國.箱形鋼混凝土組合梁的復(fù)合彎扭試驗(yàn)研究[J].建筑結(jié)構(gòu),2006,36(8):5459.[12]聶建國,李紹敬,李晨光,等.預(yù)應(yīng)力鋼混凝土連續(xù)組合梁內(nèi)力重分布試驗(yàn)研究[J]. 工業(yè)建筑,2003,33(12):1214.[13]CHAPMAN J C, BALAKRISHNAN S. Experiments on composite beams[J].The Structural Engineer, 1964,42 (11): 7476.
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