（昆明理工大学建筑工程学院，昆明  650224)

［摘要］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。

［关键词］组合梁；剪切连接件；分段均匀布置；界面滑移；解析解

中图分类号：TU398,TU317文献标识码：A文章编号：1002-848X(2011)08-0096-06

Calculation on slip of composite beams with stepwise uniform distribution of shear connectors

Wang Peng, Zhou Donghua, Wang Yonghui, Wang Huitao(Faculty of Engineering & Architecture, Kunming University of Science and Technology, Kunming 650224, China)

Abstract:In order to minimize the interfacial slips of composite beams, a shear connector layout with stepwise distribution and without increasing the number of shear connectors was presented Based on the elastic analysis of composite beams, the mechanical model of composite beam micro-element was constructed and the formula to calculate the characteristics of  interfacial slips was obtained The analytic solution of the interfacial slips for composite beams with stepwise distributed connectors was deduced under the common four kinds of loads in the practical engineering projects The interfacial slips for composite beams were calculated and compared  respectively with uniformly and stepwise distributed connectors The results reveal that  the interfacial slips of composite beams  can be reduced by the adoption of stepwise distributed connector layout. The attached deflection of the composite beams and the concrete slab cracks caused by slips can be reduced sequentially, thus  the structure durability can be improved.

Keywords:composite beam; shear connector; stepwise uniform distribution; interfacial slip; analytic solution

*国家自然科学基金(50778086)，教育部博士点基金(20095314110008)，云南省自然科学基金(2006E0024M)。

作者简介：王鹏，博士研究生，Email:wangpengletter@163.com。

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