曲线钢混凝土组合梁桥剪力滞效应影响参数研究

Study on Influence Parameters of Shear Lag Effect of Curved Steel Concrete Composite Beam Bridge

为研究曲线钢混凝土组合梁桥各种设计参数对于其剪力滞效应的影响,通过有限元软件Midas FEA建立不同参数情况下的曲线钢混凝土组合梁桥模型,并进行非线性分析,得到其横桥向的剪力滞曲线,结果表明:曲率半径越大,剪力滞系数越小;混凝土板厚度越大,剪力滞系数越小;钢梁高度越高,剪力滞系数越小。研究结论:曲率半径对全桥整体的剪力滞效应影响较大,而混凝土板厚度与钢梁高度对应于混凝土板与钢梁底板剪力滞效应有所影响。

To study the influence of various design parameters of curved steel concrete composite girder bridge on its shear lag effect,the curved steel concrete composite girder bridge model with different parameters was established by finite element software FEA,and the nonlinear analysis was carried out to obtain the shear lag curve of the transverse bridge.The results show that:the larger the radius of curvature,the smaller the shear lag coefficient;the larger the thickness of the concrete slab,the smaller the shear lag coefficient;the higher the height of the steel beam,the shear lag coefficient the smaller.Research conclusion:the radius of curvature has a great influence on the shear lag effect of the whole bridge.The thickness of the concrete slab and the height of the steel beam have an effect on the shear lag effect of the concrete slab and the steel slab.