The pipe truss refers to a lattice structure formed by connecting the round bars at the ends. The truss structure makes the truss structure economical and structurally light, and is easy to form various shapes to suit different purposes, such as simple support trusses, arches, frames and towers.
Compared with the grid structure, the tube truss structure eliminates the ball joints of the lower chord longitudinal members and the grid frame, and can meet the requirements of various architectural forms, especially the construction of the dome and the arbitrary curve shape are more advantageous than the grid structure. Its stability in all directions is the same, saving material usage. The steel pipe truss structure is developed on the basis of the grid structure. Compared with the grid structure, it has its unique superiority and practicability, and the structural steel is also economical.
Compared with the traditional open-section steel truss, the cross-section material of the pipe truss structure is evenly distributed around the neutral axis, so that the cross-section has good compression resistance and bending-torsion bearing capacity and large rigidity at the same time, without the gusset plate, and the structure is simple. The most important thing is that the tube structure is beautiful in appearance, which is convenient for the shape to have a certain decorative effect. The overall performance of the pipe truss structure is good, the torsional rigidity is large and the appearance is beautiful. It is relatively easy to manufacture, install, turn over and hoist; the steel truss truss made of cold-formed thin-walled steel has light structure, good rigidity, steel saving and full play. Advantages such as material strength, especially in the press bar and support system controlled by slenderness ratio are more economical. Buildings currently using this structure are basically public buildings. The structure has the characteristics of beautiful appearance (can be built into a flat shape, a circular arch shape, an arbitrary curved shape), convenient production and installation, good structural stability, high rigidity of the roof cover, and good economic effect.