钢-混凝土组合梁界面纵向剪力重分布

以受均布荷载作用的简支组合梁为对象，研究了栓钉等柔性连接件塑性变形引起的纵向剪力重分布．根据连接件的受力状态，将界面受力全过程划分为弹性阶段、弹塑性阶段和破坏阶段，建立了相应的剪力重分布简化模型，并导出了界面纵向剪力和轴向力的计算公式．研究表明：考虑纵向剪力重分布时，在荷载较小的情况下，轴向力随荷载增大呈线性关系增大；当荷载较大时，轴向力随荷载增大呈非线性关系增大，最后趋于稳定．

Redistribution of Longitudinal Shear Force on Interface of Steel-Concrete Composite Beams

By taking a simply supported composite beam under uniformly distributed load as an example, the redistribution of longitudinal shear force, induced by the plastic deformation of flexible connectors such as studs, was investigated. Based on the actual working condition of the connectors, the mechanical fuR-range of the interface of a steel-concrete composite beam was divided into elastic, elasto-plastic and failure stages. Simplified analytical models were established for every stage and corresponding formulae for calculating longitudinal shear force and axial force were derived. The research shows that axial force increases linearly with the increase of load when the redistribution is taken into account and load is less; then with the growth of load, the increasing is non-linear; lastly, it trends to be unchanged.