箱梁翼缘板的半无限板效应分析  

Analysis on Semi-infinite Slab Effect of Flange Slab of Box Girder

作　　者：杨立坤[1] 黄思勇[1] 

机构地区：[1]天津市市政工程设计研究院,天津市300457

出　　处：《城市道桥与防洪》2011年第6期238-241,325,共4页Urban Roads Bridges & Flood Control

摘　　要：箱梁悬臂板的常用分析方法是按根部固结的无限宽悬臂板来计算,没有考虑到在箱梁端部附近翼缘板的半无限效应,这样会使箱梁端部附近翼缘横向板配筋不足,从而造成危险。通过全箱梁模型和悬臂板模型进行分析,得出了当荷载作用在箱梁自由端附近时翼缘板的根部弯矩,以及翼缘板根部弯矩集中的范围,对大悬臂箱梁的配筋设计有参考作用。The common analysis method of the cantilever slab of box girder is to calculate according to the infinite width cantilever slab consolidated at the root,but dose not consider the semi-infinite effect of flange slab near the end of box girder.This it will make a lack of reinforcement in flange slab near the end of box girder so as to cause the danger.After the analysis of the full box girder model and the cantilever slab model,the bending moment of flange slab at the root is given while the load is applied near the free end of box girder,and the range of bending moment centralization at the root of flange slab is given,which will be referred for the design of the reinforcement for the large cantilever box girder.

关 键 词：箱梁 翼缘板 大悬臂 半无限 

分 类 号：U441[建筑科学—桥梁与隧道工程]