Static Analysis Of Steel Hollow Sandwich Slab Considering The Influence Of Node Domain

As a new type of structure,the steel hollow sandwich plate is not only applicable to single storey or multi-storey buildings with large spans,but also to multi-storey and high-rise buildings with large columns.It owns the characteristics of light weight,short construction period,graceful shape,comfortable structure and flexi ble building space.At present,many static analysis methods for the steel hollow sandwich plate are proposed,including the continuous assumption analysis method,the finite e lement method based on the beam,block,plate and shell element and the practical design method of the intersecting cross solid web beam.These methods are too complicated to calculate or too difficult to control.Many available results have shown that the influences of the node domain on the steel hollow sandwich plate are obvious,which should be taken into account in practical engineering.Considering the effects of the concrete plate on the hollow sandwich plate,parametric analysis of the size of upper and lower ribs,the shear bond size and the thickness of the concrete plate are carried out.The influences of these parameters on the stiffness of the steel hollow sandwich plate are analyzed.Considering the effects of the node domain on the steel hollow sandwich plate,the deformation characteristics,the stress and internal force distribution of the shear bond without the support span by using the finite element model with different elements.The shear deformation of the shear bond with the support span is more obvious than that of the shear bond without the support span.The closer the shear bond is to the support span,the more remarkable the influence on the node domain is.Through comparison,the shell-solid element model is more accurate for the analysis of the steel hollow sandwich plate under permissible conditions.Various shear bond node domain models are established without the stiffening plate and with the stiffening plate outside or/and inside the shear bond.The static properties of the shear bond node domain are analyzed.The results show that setting the stiffening plate can effectively reduce the stress and deformation of the shear bond node domain.In actual engineering,stiffening plate can significantly improve the bearing capacity of the node domain.