Experimental Study On Shear-bond Of Composite Slabs With Light-weight Aggregate Concrete

In the past few years,as a new type of composite structure,cold-formed steel deck and lightweight aggregate concrete composite slab,which has excellent rigidity and ductility and its anti-seismic capability.It can be in ease of construction and reducing installation time,and also making favorable economic returns.Thus,it is adapted increasingly.Comparing with traditional floor systems,the cold-formed steel deck and lightweight aggregate concrete composite slabs have lots of advantages.For instance,its light self-weight,high strength and good heat-insulating property,which is properly used in high-rise or superhigh buildings.At present,the research on composite slabs with ordinary concrete is gradually well-rounded,however,this type of researches are relatively poor. In this paper,for understanding the structure property of the composite slabs,we use YX-76-344-688 steel deck which was staple in China to develop experimental study and academic analysis on elements below:shear bond-slip behavior of lightweight aggregate composite slabs,the appearance and distribution of cracks,the strain of sheeting,the bond slip between profiled sheeting and concrete,the load-displacement curves of slabs and the ultimate bond bearing capacity and measured in the experiment.We analyse the experimental results and study the main factors that affected the composite bearing capacity: the shear span,the distribution of reinforcing steel bars,the thickness of composite slabs,the thickness of profiled sheeting,the setting of plug,the binding materials of composite slabs. A formula is reconmmended to calculate the horizontal shear-bond resistance in the light of the linear regression analysis of the test data.