Structural Mechanics Principle Of Steel Tower
The angle deformation defect can be caused by the foot welding of the tower Tower. The angular deformation of the tower not only affects the appearance and installation quality, but also reduces the bearing capacity and operation stability of the structure.Steel Tower
Therefore, reducing the angular deformation of the tower foot and improving the welding quality of the tower are the most important in the quality control of the production and processing of the angle steel tower in the transmission line.
Angular deformation is one of the common deformations in welding deformation. In production, rigid fixing and reverse deformation are usually used to reduce the angular deformation. Although rigid fixation can reduce angular deformation to a certain extent, the effect is not ideal.Steel Tower
Moreover, the rigid fixation prevents the deformation process from reducing the deformation and greatly increases the welding residual stress. The increase of the residual stress is extremely disadvantageous to the thickness of the metal material (z-direction), when the residual stress reaches a certain value or the residual stress is superimposed with the working stress, the metal can easily produce the interlayer tearing defect, resulting in a major quality accident. Rigid fixation and reverse deformation process will also reduce production efficiency, increase production costs. Therefore, the advantages of the technological measures in this paper are more prominent.Steel Tower
The structural form of the foot of the angle steel tower is doomed to the inevitability of angular deformation. Because the main material, the boot plate and the stiffening plate are concentrated on the side of the tower foot, it is a typical asymmetrical welding structure.Steel Tower
Although the thickness of the tower is larger (30~70mm), but due to asymmetric welding, the tower foot boot plate and stiffening plate welding, the tower board absorbs a lot of heat energy, the tower on the part of the metal to bear the heat (to reach the melting state), the bottom of the heat (low temperature). The upper part of the parent material is heated and expands, and the upper metal expansion is limited due to the lower temperature at the bottom of the tower.Steel Tower