等截面预应力混凝土连续梁桥设计的探讨

Discussion on Design of Uniform Section Pre-stressed Concrete Continuous Girder Bridge

以天津市津沧高速公路静王路立交主线7#～10#墩35 m+50 m+35 m等截面连续梁和天津市津港高速公路主线177#～181#墩27 m+33.8 m+31 m+27 m等截面连续梁为例,对公路及市政桥梁常采用的适合于中等跨径的等截面箱形预应力混凝土连续梁进行了结构设计与计算方面的研究和比较。对施工方法和预应力张拉方式进行了分析对比,并结合公路桥涵新规范对预应力混凝土连续梁结构设计给出一些意见和建议。

The article introduces the main line 7#～10# pier 35m+50m+35m uniform section continuous girder of Jingwang Road Grade Separation in Jingcang Expressway of Tianjin and the main line 177#～181# pie 27 m+33.8 m+31 m+27 m uniform section continuous girder of Jingang Expressway of Tianjin,studies and compares the structural design and computation suited for the medium span of uniform section box pre-stressed concrete continuous girder commonly used for the highway and municipal bridge,analyzes and contrasts the construction methods and pre-stressing tensional modes,and puts forward some opinions and proposals for the structural design of pre-stressed concrete continuous girder according to the new criterion of highway bridge culvert.