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JiangSu BaFang Steel Structure Engineering Construction Co., Ltd.
Tengfei Road, Quanshan Economic Development Zone, Xuzhou

  Introduction of pipe truss

  In recent years, with the continuous growth of China's iron and steel production, steel structure, with its own advantages, accounts for an increasing proportion in the construction, steel tube structure has also made great breakthroughs. The greatest advantage of steel tube structure is that it can perfectly combine people's functional requirements, perceptual requirements and economic efficiency requirements of buildings. Tube truss structure in steel tube structure is favored by people for its unique advantages.

  Compared with the lattice structure, the tubular truss structure can meet the requirements of various architectural forms by eliminating the lower chord longitudinal members and the spherical joints of the lattice structure. Especially, the construction of circular arch and arbitrary curve shape is more advantageous than the lattice structure. It has the same stability and saves material consumption. Steel tube truss structure is developed on the basis of grid structure. Compared with grid structure, it has its unique advantages and practicability, and the amount of steel used in structure is also more economical.

  Compared with the traditional open section steel truss (H-section steel and I-section steel), the section material of tubular truss structure distributes uniformly around the neutral axis, which makes the section have good compressive and flexural-torsional bearing capacity and greater stiffness at the same time. It is simple to construct without joint plates. The most important thing is that the shape of tubular truss structure is beautiful, and it is convenient for modelling and decoration. Effect. Tube truss structure has good overall performance, large torsional stiffness and beautiful appearance. It is easy to make, install, turn over and hoist. Steel tube roof truss made of cold-formed thin-walled steel has the advantages of light structure, good stiffness, steel saving, and material strength can be fully utilized, especially in compression bars and support systems controlled by slenderness ratio. The system is more economical. At present, the buildings with this structure belong to public buildings. The structure has many advantages, such as beautiful shape (flat plate, circular arch, arbitrary curve), convenient fabrication and installation, good structural stability, high stiffness of roof and good economic effect.

  Truss refers to a lattice structure consisting of rods connected at the end. Tube truss refers to the structure in which the rods are all round tubular members. In most cases, members in truss are only subjected to axial tension or pressure, and the stress distributes evenly on the cross-section, so it is easy to play the role of materials. These characteristics make the truss structure economical in material use and low in structural self-weight. It is easy to form various shapes to adapt to different uses, such as simple-supported trusses, arches, frames and towers, so truss structures are widely used in many large-span venues, such as exhibition centers, stadiums and other large public buildings.

  Most of the members in truss structures are welded joints. Before welding, the cutting of web and chord should be carried out according to the weld shape of each member to be welded. This requires intersecting wire cutting at the end of web and slotting cutting of chord. Because of the intersecting line type between each member and member in truss structure, the shape of end section of member is more complex, so in actual cutting processing, automatic cutting and manual cutting are generally used to process.

  Pipe truss has fewer poles than grid truss, beautiful joints and no large spherical joints. Using large-span space pipe truss structure, we can construct all kinds of lightweight long-span structures. It has a broad application prospect in public civil buildings, especially in large-scale exhibition and stadium construction.