The steel structure space frame processing is a spatial layout formed by connecting multiple components according to a certain grid pattern and connection points. It has the advantages of indoor space force, light weight, high bending rigidity, and good seismic performance; it can be used as a structure for sports venues, cinemas, exhibition halls, waiting halls, canopies in stadiums, hangars, and double-column space frames. Roof trusses of engineering buildings such as workshops. It is favored by builders for its high-efficiency force-bearing characteristics, novel and elegant form, and rapid and convenient construction.
- During the installation of the steel space frame, the setting of the temporary fulcrum should be treated correctly. Before installation, assign the fulcrum and design elevation of the fulcrum. The temporary fulcrum not only makes the force of the space frame uniform and the force of the components consistent, but also pays attention to the reliability of the foundation (steel pipe scaffolding) of the temporary fulcrum, and must pay attention to avoiding the fulcrum. move down.
- It is best to use a hydraulic jack for the support of the temporary fulcrum, so that it can be gradually adjusted during the installation process. Note that the adjustment of the temporary fulcrum should not be an adjustment at a certain point, but also consider the balance of the force of the surrounding space frames. Sometimes such local adjustments will cause some components to deform and bend.
- When disassembling the temporary fulcrum, it should be noted that the two sets of fulcrums should be lowered synchronously. During the lowering process, the lowering force should not be too large. The fulcrum is disassembled by equal step lowering method over 100mm.
- When installing and welding the welded ball space frame, the deformation problem of welding shrinkage should be fully considered, especially the overall lifting space frame and bar space frame. After installation on the road, the welding deformation and shrinkage value should be grasped before welding. When the steel space frame is welded, the welding points (heating surface) are all above the space frame in the plan view, so it is very easy to deform the structure due to heat on one side. The general deformation law is that after the space frame is welded, the surrounding rubber bearings will gradually warp freely. If the deformation is large, the camber of the original plan will be offset. If the arching is not considered in the first place, the welding will produce a very large deflection value, which will affect the quality requirements of the project acceptance. Therefore, the deformation factor of unilateral heat should be fully considered when welding the ball space frame in the project.
- After the space frame is installed, attention should be paid to the force of the rubber bearing. Some rubber bearings are allowed to be welded, some rubber bearings should be at random ends, and some rubber bearings need limit switches. Therefore, the space frame rubber The construction of the support should be carried out in strict accordance with the design requirements.
