With the rapid development of the country’s economy, steel structures have played a pivotal role in the field of construction, playing an increasingly important role. Whether in industrial or civil construction, steel structures are rapidly occupying more and more areas with their outstanding characteristics market. However, in the design, according to its characteristics, can the steel structure play a better role.
Steel has a high thermal conductivity, with a thermal conductivity of 50w (m. °C). When heated to above 100°C, its tensile strength will decrease and plasticity will increase. When the temperature reaches 250°C, the steel will resist The tensile strength will be slightly increased, but the plasticity will decrease, causing blue brittleness. When the temperature reaches 500°C, the strength of the steel will drop to a very low level, causing the steel structure to collapse. Therefore, when the ambient temperature of the steel structure reaches above 150°C, it must be designed for heat insulation and fire protection.
The layout of the layer cover support system should be determined according to the factory span, height, column network layout, layer cover structure form, crane tonnage and seismic fortification intensity of the area. Longitudinal horizontal supports should be installed in factories where the shelf spacing is not less than 12m, or where there are extra-heavy bridge cranes in the factory or where there are larger vibration equipment in the factory. At present, there are two commonly used practices at the steel structure level:
1/ Rigid layer: double-layer color profiled steel plate with thermal insulation cotton inside
2/ Composite flexible layer: It is composed of inner color steel plate, gas barrier, insulation layer, and waterproof layer of coiled material.
Temperature changes will cause the deformation of the steel structure factory and cause temperature stress to the structure. When the factory has a large plane scale, in order to avoid large temperature stress, temperature expansion joints should be installed in both the vertical and horizontal directions of the factory. The length of the section can be According to the steel structure specification. Temperature expansion joints are generally treated by the method of setting bisexuality. For longitudinal temperature expansion joints, rolling bearings can be set at the shelf supports.
Steel structure buildings mainly have the following four characteristics: scale, line, color, and change.
The facade of the steel structure factory is mainly determined by the process layout. Under the requirements of the process, the facade is concise and magnificent, while the nodes are as simple and unified as possible. The colored profiled steel plate makes the steel factory’s buildings light and colorful, which is significantly better than the heavy and single traditional reinforced concrete structure. Jumping colors and cool colors are often used in the design of steel factories, focusing on the main entrances and exits, the outer gutter, and the side flooding, which not only reflects the magnificence of the modern factory, but also enriches the facade effect.
In short, the design of steel structure factories should be designed according to its characteristics, so that the design is safe, reliable, economical, reasonable and beautiful.