混凝土薄壁连续箱梁剪力滞效应分析与对比

The Analysis and Contrast on the Shear Lag Effect of High-Strength Concrete Thin-Walled Box Continuous Girder

在大比例连续混凝土箱梁模型弹性范围内剪力滞效应试验研究基础上,结合混凝土箱梁的特点,通过选用合适的单元类型和材料本构关系,运用ANSYS大型有限元分析程序模拟了试验全过程,重点分析了连续混凝土薄壁箱梁在集中荷载作用下,荷载-挠度曲线以及不同截面处翼缘混凝土应变分布规律等问题,分析结果与试验结果吻合良好.

Base on the full test on the shear lag effect of the long flanges and trapezoidal section concrete thin-walled box continuous girder, considering particular characteristics of the concrete thin-walled box girder, if suitable element models and material constitutive laws are chose, the ANSYS program may simulate the fully flexural experimental process of the concrete thin-walled box continuous girder, the deflection and concrete strain distribution of the flanges in different sections and concentrated loads have been analysed. The analysis result is well agree with the experimental result.