大跨径连续刚构桥箱梁悬臂施工阶段剪滞效应分析

Analysis for Shear Lag Effect during Construction of Box Girder Cantilevers of Large-span Continuous Rigid Frame Bridges

采用有限元软件计算分析大跨径预应力混凝土单箱室刚构桥悬臂施工阶段主要控制截面的剪力滞系数。分析结果对桥梁悬臂施工过程应力测试控制有较大意义,可为同类桥梁设计提供参考。

This paper computes and analyzes shear lag coefficient of main control section during construction of cantilevers of large-span pre-stressed concrete single-box chamber rigid frame bridges by means of finite element software.The results of analysis show great significance for test and control of stress during construction of bridge cantilevers and can provide a reference for design of bridge of the same kind.