天津建设科技2025，Vol.35Issue(1)：13-17,5.DOI:10.3969/j.issn.1008-3197.2025.01.004
中小跨度预应力箱梁配束方法研究
Research on the Binding Method of Small and Medium Span Prestressed Box Girder
刘志才 1王青虎1
作者信息
- 1. 天津市政工程设计研究总院有限公司,天津 300392
- 折叠
摘要
Abstract
In order to research on the bundle distribution method of small and medium span cast-in-place prestressed box girder,summarizes the bundle allocation methods commonly used by various design units,it can be sum-marized into three categories:web beam end tensioning method,Web bundle full roof stretching and box top and bottom bundle auxiliary method,Web bundle top plate and box mixed tensioning method,the tensioning method of the beam end of the web beam has been improved.A pair of 4×30 m prestressed box girder is de-signed according to the above three methods and the advantages and disadvantages of each method and its ap-plication range are analyzed.Under the premise of common reinforced concrete beam for connecting pier,the web beam end tensioning method is recommended;The difference of material consumption in the design of prestressed concrete class A member and fully prestressed concrete member is compared and the design of pre-stressed concrete class A member is recommended;The range of experience value is given for the maximum length of both ends of the steel bundle.关键词
预应力箱梁/配束方法/腹板束梁端张拉法/内卡式千斤顶/预应力混凝土A类构件Key words
prestressed box girder/bundling method/web beam end tensioning method/inner-jack type jack/pre-stressed concrete class A member分类
交通工程引用本文复制引用
刘志才,王青虎..中小跨度预应力箱梁配束方法研究[J].天津建设科技,2025,35(1):13-17,5.
