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为了尽量减小组合梁界面滑移,提出在不增加剪切连接件数量的情况下,剪切连接件采用分段均匀布置方式。基于弹性理论的分析方法,分段建立组合梁单元体力学模型,推导了组合梁界面滑移的计算公式,并得出了工程中常见4种荷载作用下,剪切连接件分段均匀布置时简支组合梁界面滑移的解析解。通过实例对连接件均匀和分段布置2种情况下组合梁滑移进行了对比计算分析。结果表明,连接件分段布置方法可有效减小组合梁界面滑移,从而减小由于滑移引起的组合梁附加挠度和混凝土板的裂缝,提高结构的耐久性。
In order to minimize the slippage of the composite beam interface, it is proposed that the shear connectors should be arranged in uniform sections without increasing the number of shear connectors. Based on the analysis method of elastic theory, the mechanical model of composite beam element is established in stages, and the formula for calculating the interface slip of composite beam is deduced. The results show that when shear connectors are evenly distributed Analytical solution of interface slip for simply supported composite beams. By means of example, the slippage of composite beam under two kinds of uniform and segmented arrangement of connectors is compared and analyzed. The results show that the segmental arrangement of connectors can effectively reduce the interface slippage of composite beams and reduce the additional deflection of composite beams due to slip and the crack of concrete slabs, so as to improve the durability of structures.