| Profiled steel- concrete composite slab has the characteristics of fast installation, non-dismantling template and simultaneous construction of multi layers. At present, it has been widely used in the high-rise building, industrial plant and the transformation of existing homes. Lightweight aggregate concrete has the advantages of light weight, heat insulation, thermal insulation and good seismic performance. In engineering practice, it can effectively reduce the weight of structure, enhance the seismic performance of structure. Therefore, the composite slabs composed of Profiled steel plate and light aggregate concrete can also own both the advantages of lightweight aggregate concrete and ordinary concrete composite slabs. So it has wide popularization value and application prospect in the new high-rise, long-span structures.To evaluate the longitudinal resistance of profiled steel sheeting and lightweight aggregate concrete composite slabs, this paper designed 11 full-scale test pieces of profiled steel sheeting-light weight concrete composite slabs,finished static trail, analyzed the destructive process of composite slabs, attained load-deflection curves and bending moment-end relative slip curves of composite slabs, as well as, analyzed and compared the shear-bond behavior of composite slabs through m-k method and partial shear method respectively. Therefore, the result shows that: First, all the ends of test pieces have obvious slippage and shear-bond damage. Second, shear-bond coefficients(m and k) and design stress intensity value(τu,k) perfectly illustrate the longitudinal shear-bond capacity of composite slabs.Analyze the ultimate load of non-connectors slabs with finite element software ANSYS, to obtain relationship of stress state, deformation and crack distribution and development of the composite plate. The results are in good agreement with the experimental results. |
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