It is suitable for mountainous, rural and other scenes that do not have high requirements for the beauty of the tower body, and it is suitable for various heights. It is a traditional form of iron tower, with a wide range of usage, easy quality assurance, and high safety. The processing, installation, use and maintenance are convenient, and the construction cost is low. It can be built on the top of the machine room to save land and basic cost, especially when the site is small, such as the top of the mountain.
The main components are steel pipes, and the other components are lattice-type towers composed of steel pipes or section steels. It is a support structure for overhead transmission lines to support conductors and lightning protection lines. Make the wire meet the distance limit requirements to the ground and ground objects, and can withstand the wire, lightning protection wire and its own load and external load.
Main feature
The steel tube tower structure has relative technical and economic advantages, and is suitable for use in transmission towers that bear heavy loads.
Load characteristics
The steel tube tower rods have low wind pressure, high flexural rigidity, simple structure, and clear force transmission, which can give full play to the load-bearing performance of the material. On the one hand, it can reduce the weight of the tower and reduce the foundation force; on the other hand, it is conducive to enhancing extremes. The ability to resist natural disasters under conditions. In the case of meeting the requirements of strength and stability calculations, the use of steel tube towers with relatively small wind pressure body coefficients can significantly reduce the wind load on the tower body.
Sectional characteristics
The cross-section of the steel pipe member is symmetrical, and the cross-section characteristics are isotropic; the material is evenly distributed around the circumference, and the cross-section has a large bending stiffness. For the tension member of the transmission tower, when the cross-sectional area of the steel pipe is equal to that of the angle steel, the steel pipe tower member does not show its advantages. As for the bending members of the transmission tower, the use of steel pipes with a smaller cross-sectional area and a larger radius of gyration can fully exert the mechanical properties of the material in a balanced manner, and meet the requirements of structural rigidity and stability, especially for larger structural geometrical dimensions and relatively large rods. The advantages of long, heavy-load steel towers and steel pipe towers with good stability are obvious.
Structural connection
In terms of structural connection, the main material of the steel pipe tower adopts flange connection or intersecting connection, the oblique material and the main material adopt plug-in connection or intersecting connection, and the main material of angle steel tower adopts inner or outer connection. They are mainly connected by connecting plates and bolts. The flange and plug-in plate connection structure of the steel pipe tower is relatively simple. Although the welding workload is increased, the eccentricity of the angle steel member and other adverse effects on the structural load-bearing performance are reduced, and the rigidity and compactness of the connection nodes are enhanced, which is helpful To improve the overall rigidity and stability of the structure and the ability to resist wind and vibration loads.
