基于部分交互作用理论的钢-混凝土组合梁弹性挠度分析

Elastic deflection analysis of steel-concrete composite beam based on partial-interaction theory

为分析钢-混凝土组合梁界面滑移对组合梁变形的影响,基于Euler-Bernoulli梁弹性弯曲理论和钢-混凝土组合梁部分交互作用理论,建立了钢-混凝土组合梁受力时截面内力、界面滑移和弯曲变形控制微分方程;得出了组合梁界面滑移、截面内力和弯曲挠度的一般方程,给出了各种工况下考虑界面滑移时的组合梁挠度方程和跨中挠度系数,并与其他模型进行对比验证。结果表明:本研究得到的组合梁跨中挠度方程与现有模型相比在理论上更为严密,所得结果更为安全。

The control differential equations for analysis of the cross section inner-force, the interface slip and bending deformation of a steel-concrete composite beam were established based on the Euler-Bernoulli beam model and partialinteraction theory to analyze the effect of the interface slip, The general equations of interface slip, cross section innerforces and flexure deformation were build up and the deflection formulas of steel-concrete composite beams under various loads were obtained, which were compared with those from other models.