温差、收缩引起的钢-混凝土组合梁界面处剪力作用研究

Study on Shear Effect Caused by Temperature and Shrinkage on the Interface of Steel-Concrete Composite Beams

在结构力学和材料力学的基本理论基础之上,根据平面杆系结构的基本理论,将钢-混凝土组合梁简化成双层梁单元,在以剪力钉剪力与滑移近似为线性关系的假设前提之下,结合目前国内外比较成熟的钢-混凝土组合梁界面处滑移的基本微分方程,推导了钢-混凝土组合梁,在温差、收缩作用下,界面处剪力作用的分布理论。最后结合参考文献中的模型试验结构,将理论计算结果和有限元计算结果所做的对比分析表明,文中提供的计算分工,可为钢-混凝土组合梁在温差、收缩作用下界面处剪力作用的计算提供一定的参考依据。

The shear effect caused by temperature or shrinkage on the interface of a steel-concrete composite beam is mainly studied in this paper on the base of structural mechanics and material mechanics and the slippage differential equation which is sophisticated all over the world. The steel-concrete composite beam is simplified as two-double beam on the assumption that of linear relationship between shearing force and deformation of bolt nail. Then, the theoretic distribution of shear force caused by temperature and shrinkage on the interface of steel-concrete composite beams is deduced based on the basic slip differential equation used widely all over the world. Comparing the calculated results with that calculate by finite element analysis, it is shown that the proposed method is good.