曲线箱梁剪力滞效应的实用计算方法

Research of practical calculating method of the shear lag effect in curved box girders

基于数理统计的基本原理,运用多元回归分析方法,建立了曲线箱梁结构的剪力滞的实用计算公式。针对目前薄壁曲线箱梁剪力滞计算方法作了进一步探讨,采用逐步回归的方法,建立最优回归方程。研究结果使原本复杂的计算变得较为简单,用模型计算出薄壁曲线箱梁剪力滞系数与列表数据的最大相对误差只有1.47%。这为完善有关薄壁曲线箱梁剪力滞的计算提供了重要的依据,为工程设计提供了参考。

On the basis of mathematical statistic, using the method of multiple regression analysis, the practical calculating formula of the shear lag coefficient in thin-walled curved box girders is derived. This research work is a further study of current calcuating methods of the shear lag effect in thinwalled curved box girders. The research results make the complex calculation extremely simple and perfect the formation calculating of the shear lag effect on thin walled curved box girders. Calculating maximal relative error of the model of the shear lag coefficient on thin-walled curved box girders and the list data is only 1.47%. They can also supply reference on the engineering design and provide an important direction for future research of the shear lag effect on thin-walled curved box girders.