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胡少偉，胡漢林

（南京水利科學(xué)研究院材料結(jié)構(gòu)研究所， 南京 210024）

［摘要］為掌握預(yù)應(yīng)力鋼混凝土組合箱梁在正彎矩作用下的受力性能，對(duì)10根組合箱梁進(jìn)行了靜載試驗(yàn)。對(duì)預(yù)應(yīng)力組合梁受彎時(shí)的變形、截面應(yīng)變情況、裂縫分布、破壞形態(tài)做了詳細(xì)的描述。探討了不同初始預(yù)應(yīng)力大小、布筋形式、加載方式對(duì)預(yù)應(yīng)力組合梁抗彎性能的影響。試驗(yàn)現(xiàn)象和數(shù)據(jù)表明:預(yù)應(yīng)力組合梁與普通組合梁相比具有多方面的優(yōu)勢(shì)，不同布筋形式的組合梁受力性能有差別，利用預(yù)應(yīng)力技術(shù)能夠較好地提高既有組合梁的抗彎性能。

［關(guān)鍵詞］預(yù)應(yīng)力組合箱梁； 抗彎性能； 試驗(yàn)研究； 布筋形式； 預(yù)應(yīng)力加固

中圖分類號(hào)：TU398+.9文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002848X(2013)06005806

Experimental study on flexural behaviors of prestressed steelconcrete composite box beams

Hu Shaowei， Hu Hanlin

(Department of Materials and Structural Engineering， Nanjing Hydraulic Research Institute, Nanjing 210024, China)

 

Abstract:In order to know the mechanical behavior of the prestressed steelconcrete composite box beams under positive moments, ten specimens had been tested under static loads. The experimental results of prestressed composite beams, including deformation, section strain, cracking distribution, failure mode were analyzed in details.The influence of prestress degree, distribution forms of prestressed tendons and loading mode on

 flexural behaviors of prestressed composite beam had been discussed. Experimental phenomena and data indicate that the prestressed composite beams have more adventages than the normal composite beams, and the prestress technology can be used to improve the flexural performance of the existing composite beams.

Keywords:prestressed composite box beam; flexural performance; experimental study; distribution form; prestress reinforcement

*江蘇省自然科學(xué)基金項(xiàng)目（BK2007010），中央級(jí)公益性科研院所重大項(xiàng)目（Y40705）。

作者簡(jiǎn)介：胡少偉，教授，博導(dǎo)，Email：hushaowei@nhri.cn。

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