带孔开槽板咬合式连接件钢板-混凝土组合梁抗弯及抗剪性能研究  

The Flexural and Shear Performance of Steel-Concrete Composite Beams with Perfobond Slotted Plate Snap-ln Connectors

作　　者：黄振宇[1,2] 赵晓龙 张维[1,3] 严旭 HUANG Zhenyu;ZHAO Xiaolong;ZHANG Wei;YAN Xu(College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China;Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering,Shenzhen University,Shenzhen 518060,China;Shenzhen Technology Institute of Urban Public Safety,Shenzhen 518046,China;Zhubo Design Co.,Ltd.,Shenzhen 518035,China)

机构地区：[1]深圳大学土木与交通工程学院,广东深圳1518060 [2]深圳大学广东省滨海土木工程耐久性重点实验室,广东深圳518060 [3]深圳市城市公共安全技术研究院,广东深圳518046 [4]筑博设计股份有限公司,广东深圳518035

出　　处：《建筑钢结构进展》2023年第10期1-15,共15页Progress in Steel Building Structures

基　　金：国家自然科学基金(52108159);广东省杰出青年基金(2022B1515020037);广东省自然科学基金(2021A1515010932);深圳市国际科技合作项目(GJHZ20200731095802008)。

摘　　要：提出了一种用于钢板-混凝土组合梁的新型带孔开槽板咬合式剪力连接件,以解决钢-混组合结构因界面滑移造成的组合度下降问题。为揭示该新型咬合式连接件组合梁的受力机理,开展了一系列抗弯和抗剪试验研究,以剪跨比、含钢率、混凝土类型、板式连接件厚度及间距为主要参数,分析不同参数对组合梁破坏模式、承载能力和变形延性等方面的影响。研究发现:咬合式连接件能有效提高组合梁的组合度,减小界面滑移,充分发挥钢板-混凝土共同工作效应;所有试件在破坏前均表现出良好的延性;因芯材混凝土材性差异,以超高性能混凝土(UHPC)作为芯材的抗剪试验梁与以普通混凝土作为芯材的抗剪试验梁相比,极限承载力提高了1倍以上,变形延性提升了近5倍。基于破坏机理提出了咬合式连接件组合梁的抗弯承载力及抗剪承载力理论模型,通过与试验结果对比证实了所提出的模型能很好地预测组合梁的极限承载能力。A new type of slotted plate snap-in connector for steel-concrete composite beams was proposed to solve the problem of decreasing composite degree caused by interface slip of steel-concrete composite structures.In order to study the load transfer mechanism of this new composite beam,a series of flexural and shear tests were carried out.The main parameters were shear span-to-span ratio,steel ratio,concrete type,connector thickness and spacing between connectors.This study examined the influences of these parameters on the failure mode,load capacity,deformation ductility,etc.of the composite beam.The research shows that the snap-in connector can effectively improve the degree of composite action,reduce the slippage between steel-concrete interface,and fully realize the synergistic effect of steel plate and concrete.All the specimens show a good ductility before failure.The ultimate shear resistance of the beam with ultra-high performance concrete(UHPC)is more than 100%higher than that of the beam with normal concrete,and the deformation ductility increases by nearly 500%.Finally,based on the failure mechanism,the study proposed a theoretical model of the flexural and shear resistance of the composite beam.The comparison with the experimental results confirms that the proposed model can well predict the ultimate resistance of the composite beam.

关 键 词：组合梁 带孔开槽板连接件 界面滑移 抗弯 抗剪 承载力 

分 类 号：TU398.9[建筑科学—结构工程]