Force analysis of precast concrete sandwich plate and combined action of inner and outer wythes
Due to the combination effect of inner and outer blades,partial composite precast concrete sandwich plate has the advantages of small wall thickness and high construction efficiency,but there is no analytical method to calculate the internal force and deformation of the partial composite sandwich plate.The connectors are homogenized into a continuous connecting layer,and the out-of-plane deformation and shear deformation of the connecting layer are considered to establish the basic equations of the structures.The calculation formula of internal force and deformation of the inner and outer blades of concrete sandwich plate is obtained through theoretical derivation,and the analytical formula of internal force and deflection of the inner and outer blades of the concrete sandwich plate are verified by the finite element software ABAQUS,and the verification shows that the deduced formula has high precision.Based on the internal force and deflection of the inner and outer blades of concrete sandwich plate,the analytical formula of the combination coefficient of the concrete sandwich plate can be further derived.The analysis results show that the combination coefficient of the concrete sandwich plate increases with the increase of shear stiffness(Ks)of the connecting layer.When Ks is very small,the sandwich plate can be regarded as a non-composite plate,and when Ks is very large,the sandwich plate can be regarded as a fully composite plate.
concrete sandwich platehomogenizationinternal force analysiscombination coefficientdeflectionprefabricated buildingout-of-plane load
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