单箱三室连续宽箱梁有效宽度分析

Research on Effective Width of Continuous Single-Box Three-Cell Broad Box Girder

箱梁在受弯时,横桥向存在剪力滞效应,为了在计算中应用初等材料力学方法求解,采用了翼缘有效宽度方法。以某实桥为背景,通过对单箱三室连续宽箱梁空间实体模型进行了有限元分析,计算得出了箱梁顶板及底板的有效分布宽度系数ρs及ρf,并与规范值进行了比较,可为同类工程设计提供参考。

There are shear lag effects in the transverse direction when the box girder bends.To apply elementary materials mechanics methods in the calculation,the effective width method is used.Continuous single-box three-cell broad box girder is analyzed by finite element analysis and effective width is obtained by analyzing longitudinal stress on roof and floor of box girder.The results can be used as references for the design of similar works.