作　　者： ; ; ;

机构地区： 广东工业大学土木与交通工程学院

出　　处： 《佛山科学技术学院学报（自然科学版）》 2011年第6期28-33,共6页

摘　　要： 以石湾特大桥为研究背景,采用空间有限元理论,通过建立整桥的空间有限元模型,研究了单索面矮塔斜拉桥在预应力和竖向集中力荷载作用下各施工阶段主梁的受力特性和剪力滞效应。分析结果表明:单索面矮塔斜拉桥宽幅箱梁在施工阶段剪力滞效应较严重(最大剪力滞系数为1.93),部分翼缘板出现拉应力;最大悬臂状态时,主梁整体呈现正剪力滞现象,应力分布基本上符合应力扩散原理。 In light of finite element theory and taking Shiwan Bridge as a reference, we established the spatial finite element model of the whole bridge and studied the mechanical characteristics and shear lag effect of girder with Prestressing and vertical concentration forces of a Single-plane Extradosed Cable-stayed Bridge in each construction stage. We found that Shear Lag Effect of the Wide Box Girder of a Single-plane Extradosed Cable-stayed Bridge is serious （the Maximum shear lag coefficient is 1.93）,and tensile region occurred in the flange. Additionally, the positive shear lag effect of girde is presented in the largest cantilever state and the distribution of stress is basically in accord with the stress diffusion principle.

关 键 词： 矮塔斜拉桥 施工阶段 剪力滞效应 有限元

领　　域： [建筑科学] [交通运输工程]