胡少伟，胡汉林

（南京水利科学研究院材料结构研究所， 南京 210024）

［摘要］为掌握预应力钢混凝土组合箱梁在正弯矩作用下的受力性能，对10根组合箱梁进行了静载试验。对预应力组合梁受弯时的变形、截面应变情况、裂缝分布、破坏形态做了详细的描述。探讨了不同初始预应力大小、布筋形式、加载方式对预应力组合梁抗弯性能的影响。试验现象和数据表明:预应力组合梁与普通组合梁相比具有多方面的优势，不同布筋形式的组合梁受力性能有差别，利用预应力技术能够较好地提高既有组合梁的抗弯性能。

［关键词］预应力组合箱梁； 抗弯性能； 试验研究； 布筋形式； 预应力加固

中图分类号：TU398+.9文献标识码：A文章编号：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

*江苏省自然科学基金项目（BK2007010），中央级公益性科研院所重大项目（Y40705）。

作者简介：胡少伟，教授，博导，Email：hushaowei@nhri.cn。

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