The difference between bolt ball grid and welded ball grid, why bolt ball grid is commonly used
Bolt ball grid and welded ball grid are two commonly used grid structure forms in modern large-scale buildings. Although both belong to the grid structure, there are significant differences in structure, construction and use performance. This article will analyze the differences between these two forms of grid in detail and why bolt ball grids are more commonly used in practice.
1. The difference between bolt ball grid and welded ball grid**
1.*Connection**: The bolt ball grid is bolted to connect the nodes, and the welded ball grid is to connect the nodes together by welding.
2.*Construction technology**: The installation of bolt ball grid is usually after the factory prefabricates the rods and bolt balls, and then assembles them on site. The welded ball grid is mostly welded and assembled at the construction site.
3.*Node Structure**: The node of the bolt ball grid is generally composed of bolts, steel plates and connectors, and the structure is relatively simple. The node structure of the welded ball grid is more complex and requires a precise welding process.
4.*Bearing capacity**: The bolt ball grid has a strong overall bearing capacity due to its node connection mode. The welding ball grid needs to judge its bearing capacity according to the welding quality and process.
5.*Maintenance and disassembly**: The node connection of the bolt ball grid makes its maintenance and disassembly relatively convenient. Once the welding of the node of the welded ball grid is completed, it is difficult to maintain and disassemble it in the later stage.
6.*Scope of application**: Bolt ball grid is suitable for grid structure with large span and high requirements for node flexibility. The welded ball grid is mostly used in occasions with small spans and high stability requirements.
Second, why bolt ball grid is more commonly used**
1.*High flexibility**: The node connection method of the bolt ball grid allows it to be prefabricated in the factory and quickly assembled on site, which greatly shortens the construction period. In addition, for large or specially-shaped grid structures, bolted joints provide greater room for adjustment.
2.Strong bearing capacity: Bolted joints allow the position and angle of each node to be adjusted within a certain range, thereby optimizing the bearing capacity of the overall structure. At the same time, the bolted joint has good fatigue resistance and is suitable for structures that frequently bear dynamic loads.
3.*Easy to maintain and transform**: The node connection of the bolt ball grid makes it more convenient for later maintenance and transformation. If a node needs to be replaced or reinforced, it can be done by simply loosening the bolts, which is easy to operate and does not affect other parts.
4.*Wide Applicability**: Bolt ball grids are suitable for building structures of all sizes and shapes, from large venues to small exhibition halls. Its flexibility gives designers more room to play in the concept phase.
5.Quality Control: Doing most of the assembly work in the factory allows for better control of the quality of the node connections and ensures the stability and safety of the overall structure.
6.Cost-effective: Compared with the situation that some welded ball grids require a lot of on-site welding, the installation cost of bolted ball grids is relatively low, especially in the case of increasing labor costs, and its economy is more significant.
To sum up, bolt ball grid has become a commonly used grid structure form in modern large-scale buildings because of its advantages in connection flexibility, strong bearing capacity, easy maintenance and transformation, wide applicability, quality control and cost-effectiveness. With the continuous progress of technology and the accumulation of engineering practice, it is believed that the bolt ball grid will have a wider application prospect in the future.