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以简支钢板夹芯混凝土组合梁为对象,建立了组合梁在集中载荷作用下的简化计算模型,推导出钢板与混凝土界面间的界面滑移及组合梁变形的计算公式。该公式既能描述组合梁的界面滑移规律,又能体现界面滑移对组合梁变形的影响。并把按本文推导出的计算公式计算变形的结果与文献中的实验结果进行了对比,结果吻合良好。通过算例研究结果表明:随着载荷与剪力连接件间距的增大,界面滑移增大,变形也增大。
A simple calculation model of composite beams under concentrated load is established, and the formulas for calculating the interface slip between the steel plate and the concrete and the deformation of the composite beam are deduced. The formula can not only describe the interface slip law of composite beams, but also reflect the influence of interface slip on the deformation of composite beams. The result of deformation calculated by the calculation formula deduced in this paper is compared with the experimental results in the literature. The results are in good agreement. The results of a numerical example show that the interface slip increases and the deformation increases with the increase of the distance between the load and the shear connector.