Research On Multi-layer And Large-span Prefabricated Hybrid Space Steel Grid Box Structure

The assembled monolithic mixed space steel grid box structure for large span narrow and long plane(L_x/L_y>1.5)supporting point spacing,most of the same individual problem caused by different hollow floor grid,the mechanics model of floor structure is one-way slab".Hybrid grid is essentially orthogonal diagonal a improved grid on the basis of the floor is still a large number of grid orthogonal diagonal and small section oblique diagonal grid,improve the processing and installation difficulty.The introduction of this paper first expounds the development of steel structure building at home and abroad,and leads to the steel grid box structure of mixed grid form on the basis of the existing assembled orthogonal cable-stayed steel grid box structure.Secondly,the basic mechanical properties of the hybrid steel grid box structure are analyzed.Then,based on the economic factors such as layer displacement,interlayer displacement angle,interlayer shear and other economic factors,such as steel quantity and other economic factors,the correlation analysis of multiple earthquakes and rare earthquakes is carried out on the mixed steel grid box structure and the conventional steel frame structure according to the current industry specifications.It has enough lateral stiffness,ductility and better economic benefits.Finally,based on a practical project,the specific division of the grid unit of the hybrid space steel grid box structure and the related assembly connection are introduced in detail.The research shows that the assembly type hybrid space steel grid box structure can meet the basic requirements of"safe,reasonable,advanced and economical"of the structure design,and promote the realization of"four sections and one environmental protection"green development requirements,and has good promotion value.