简支钢—混组合箱梁剪力滞效应研究

The Study on the Shear Lag Effect of Simply Supported Steel-concrete Composite Box Beam

为研究简支钢—混凝土组合箱梁体系的剪力滞效应,建立了可考虑剪力滞后、剪切变形、材料和几何非线性的三维数值模型,采用模型对影响钢—混凝土组合箱梁力学行为的主要参数(宽跨比、滑移刚度和荷载形式等)进行了分析,分析结果表明:组合箱梁的剪力滞效应与荷载类型和作用位置有关,剪力滞系数随着宽跨比的增大而增大。

For the study of the shear lag effect of simply supported steel-concrete composite box beamsystem, this paper established three-dimensional numerical model considering shear lag, shear deformation,material and geometric nonlinearity. Using the model, it analyzed the main parameters, which affected themechanical behavior of steel-concrete composite box beam.