Bolted Spherical Space Frame

Bolted Spherical Space Frame is a spatial grid structure composed of steel pipe members connected by high-strength bolted spherical nodes.Its core components include the spherical node,steel pipe members,high-strength bolts,and end plates/conical heads.Through precise assembly of the spherical nodes and members,it forms unit grids such as triangles and quadrilaterals,widely used in building roof and floor systems requiring large-span column-free spaces.Its all-steel design combined with modular assembly characteristics offers advantages of being lightweight,high-strength,seismic-resistant,and efficient in construction,making it the preferred structural form for large public buildings such as stadiums,exhibition centers,and airport terminals.

The core advantage lies in the synergy between nodal connections and spatial load-bearing:The bolted spherical nodes are precision-engineered in factories,enabling rapid connection of steel pipe members via high-strength bolts.This provides high connection stiffness,easy disassembly,and allows flexible adjustment of grid dimensions and member specifications according to span requirements.The steel pipe members(typically made of Q235 or Q355 grade seamless or welded steel pipes)primarily bear axial forces,fully utilizing the tensile and compressive properties of steel.The structure's self-weight is only 1/5 to 1/3 that of traditional concrete structures,yet it can achieve super-large spans of 60-150 meters,significantly reducing foundation costs.The integral spatial grid load-bearing characteristic offers excellent wind and seismic resistance,effectively distributing local loads and ensuring outstanding structural stability.

Key features include modular prefabrication and rapid construction:All components(spherical nodes,steel pipes,connecting pieces)are standardized and produced in factories,with dimensional accuracy ensured by CNC machining.On-site assembly requires only bolting without complex welding,reducing the construction period by 30%-50%compared to traditional truss structures.This method is particularly suitable for large-span and high-altitude work scenarios.The structure offers good sealing performance;steel pipe surfaces undergo anti-corrosion treatments such as hot-dip galvanizing or fluorocarbon spraying,while spherical nodes are protected with sealing gaskets,enabling adaptation to harsh environments like open air or coastal areas,with a service life exceeding 50 years.Additionally,the grid structure allows flexible designs,including flat slabs,arches,and curved surfaces,combining functionality with architectural aesthetics.

Typical applications include stadium roofs,large-span exhibition hall roofs,airport terminal departure levels,industrial plant skylights,and high-speed railway station waiting halls.By balancing structural efficiency,construction convenience,and durability,the bolted spherical space grid has become a core solution for modern large-span buildings meeting the demands of"large space,lightweight structure,and rapid construction,"aligning with the development trends of green building and industrial construction.