Dapeng Town Industrial Park, Tongshan District, Xuzhou City, Jiangsu Province, China
The difficult part of the design of grid support should be the design of grid support. The support of the space frame is supposed to conform to the actual structure. The elastic stiffness of the input support is required in SFCAD. Therefore, how to calculate the elastic stiffness often becomes the key. Many Space frame designers do not distinguish the stiffness of independent column support, ring beam support, and lower structure, and simply take the default value of 0.3KN /mm. As a result, the assumption of space frame support differs greatly from the actual structure, and the design department of the space frame structure is safe. When the software in CAD inputs the substructure together for calculation, the elastic stiffness of the support and the lateral stiffness of the substructure must be accurately calculated to calculate the equivalent elastic stiffness.
If the supports are set too close to each other, the tension of one support will increase the pressure of the other support. In the same project, there is a tension bearing with a pressure bearing. This phenomenon increases the difficulty in the design of the bearing. So make sure that you cancel the support that creates the tension, which also means that the more supports, the better.
Rack in the design of bearing plate and the vertical plate design, when the horizontal force is not big, bearing the vertical plate height is not big, also for the average pressure bearing made plate cross, bearing base plate thickness calculation formula can be simplified as T = 0.93 R (R should be a square root, the attention is not hit square root), among them, the R for bearing the vertical bearing reaction force, vertical plate thickness 0.7 plate thickness.
