连续弯箱梁剪滞效应分析和实用计算法研究

Analysis of the Shear Lag Effect in Continuous Curved Box Girder Bridges and the Research on Practical Calculating Method

采用空间薄板有限元法，分析了连续弯箱梁桥的剪滞效应规律及主要结构参数对剪滞效应的影响；通过模型试验和算例分析验证了计算方法的准确性；提出了供工程设计参考的实用剪滞系数和箱梁翼缘有效宽度比计算图表；为完善规范有关弯箱剪滞系数的计算和有效分布宽度的内容提供依据。

The space shell finite element method is applied to analyze the shear lag effect and the structural parameters influences on the shear lag effect in continuous curved box girder bridges. The accuracy of the method is proved by means of the plexiglass model test and the analysis of the illustrative example.The practical tables calculating shear lag coefficient and the effective width ratio are provided to perfect the formulation concerned in the standard.