悬臂混凝土薄壁箱梁试验研究与分析对比

Analysis on the shear lag and effective width of high-strength concrete thin- walled box cantilever girder

在大比例悬臂混凝土梯形截面箱梁模型弹性范围内的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;从试验和理论分析的基础上,重点分析了悬臂混凝土薄壁箱梁悬臂部分在不同荷载作用下,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较好.图7,表1,参14.

Base on the full test on the shear lag effect of the long flanges and trapezoidal section concrete thin-walled box cantilever girder, considering particular characteristics of the concrete thin-walled box girder, suitable element models and material constitutive laws are chose,the ANSYS program simulate the fully flexural experimental process of the concrete thin-walled box cantilever girder. And base on the test and analysis, the deflection and concrete strain distribution of the flanges in different sections and different loads were analysed. The result is well agree with the experimental result. 7figs., ltab., 14refs.