Experimental study on bond behavior of large-span concrete composite slab with profiled steel sheeting
In order to study the bond behavior of large-span concrete composite slab with profiled steel sheeting,and to determine the design value of longitudinal shear strengh for engineering design,the bending test of 6m full-scale members was carried out.Two groups of specimens were designed in the test.The thickness of the profiled steel sheeting was 0.88mm and 1.13mm respectively,and the net span of the floor was 6m.Each group of specimens is composed of one static load large-span specimen,two dynamic load large-span specimens and one static load short-span specimen,and the design value of longitudinal shear strengh of each specimen was calculated based on the European code.The results show that the cyclic loading fatigue dynamic loading does not affect the ultimate bearing capacity and failure mode of the composite floor.The thickness of the profiled steel sheeting has a great influence on the longitudinal shear bearing capacity,and the increase of the design value of longitudinal shear strengh is greater than the increase of the thickness of the profiled steel sheeting.Compared with the 0.88mm profiled steel sheeting,the thickness of the 1.13mm profiled steel sheeting increases by 28％,and the longitudinal shear bearing capacity increases by about 60％.Considering the influence of bearing friction,the design value of longitudinal shear strengh obtained based on the test will be reduced by 7％～10％.The obtained design value of longitudinal shear strengh can be used for the design of shear-bond bearing capacity of concrete composite slab with profiled steel sheeting with span length as large as 6m or less.
profiled steel sheetingcomposite slabbond behaviourpartial shear-bond connection methoddesign value of longitudinal shear strengh
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