| Recently profiled sheeting concrete composite slab has been extensively applied to engineering because of its big rigidity,good ductility,good seismic resistance performance,economic returns,ease of construction,and short construction period, etc.This construction can good use of the characteristics that tension-resistant steel and compression-resistant concrete.This paper makes systemic studies on the close-section steel duck-concrete composite slabs.eleven specimens are tested to study the capacity,behavior and failure mode.By means of this test,we measure the law of the crack generated and developed and of the stain change of steel deck in different locations,limit capacity of composity slabs,the load-strain curve,load-deflection curve and load-slip curve,in addition,we analysised the main factors that affect the close-section steel deck-concrete composite slab bearing capacity,they are:shear span,thickness of steel,height of composite slab and concrete strength.In this paper,we maked further study of the failure mode of composite slab, mainly include the bending destruction and vertical shear bond destruction.m,k coefficient was obtained through regression analysis,finally,we can obtained the vertical shear-bond capacity formula.Finally,we compared the results between this test and some tests have done before,analysised the application of vertical shear-bond capacity formula. |
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