【Description】One of the main types of steel structure building structure. Steel is characterized by high strength, light weight and high rigidity, so it is particularly suitable for building large-span and overweight buildings. Steel structure materials have good uniformity and isotropy, and are an ideal elastomer, in line with the basic assumptions of general engineering mechanics. The material has good plasticity and toughness, can be greatly deformed, and can well withstand dynamic loads; Short construction period; High degree of industrialization, able to carry out specialized production, high degree of mechanization; With high processing accuracy, high efficiency and good sealing, it can be used to manufacture gas tanks, oil tanks and transformers.
One of the main types of steel structure building structure. Steel is characterized by high strength, light weight and high rigidity, so it is particularly suitable for building large-span and overweight buildings. Steel structure materials have good uniformity and isotropy, and are an ideal elastomer, in line with the basic assumptions of general engineering mechanics. The material has good plasticity and toughness, can be greatly deformed, and can well withstand dynamic loads; Short construction period; High degree of industrialization, able to carry out specialized production, high degree of mechanization; With high processing accuracy, high efficiency and good sealing, it can be used to manufacture gas tanks, oil tanks and transformers.
The disadvantage of steel structure is poor fire resistance and corrosion resistance. It is mainly used for load-bearing skeletons of heavy-duty workshops, plant structures under dynamic load, plate and shell structures, towering TV towers and mast structures, large-span structures such as bridges and warehouses, and high-rise buildings.
The steel structure should study high-strength steel to greatly improve its yield point strength; In addition, it should be rolledH-beam, T-beam, profiled steel plate and other new steels to meet the needs of long-span structures and high-rise buildings.
Installation quality control of steel structure:
1. Before installation, the construction unit should check the product certificate, design documents and pre-assembly records of the components, and re-inspect and record the dimensions of the components. When the deformation and defects of the steel structure exceed the allowable deviation, it should be treated.
Before installation, a detailed measurement and calibration process should be prepared. Before welding and installation, the process test of simulating the product structure should be carried out on the welded thick steel plate, and the corresponding construction process should be formulated. For prefabricated roof trusses, a certain degree of arching should be preset.
2. After the steel structure is hoisted in place, measure and mark the control points required by the design requirements of the component positioning axis and elevation, and check the quality of the hoisting docking before welding. Install temporary supports and steel corrugated cables to ensure the safety and stability of steel roof trusses during construction.
3. When the steel structure is installed, the construction unit should submit the elevation size, welding, painting, etc. After each component is hoisted, it must be submitted to the supervision and acceptance.
The steel structure has a lighter self-weight and high strength. Under the same load conditions, the steel structure used is lighter than other structures. In the comparison of multi-storey civil buildings, the weight of steel structure civil buildings is only brick-concrete and reinforced concrete structuresAbout 70%. In the construction process, some large-span buildings generally adopt steel structure construction mode.
Due to the uniform material of the steel, good plasticity and toughness, the quality of the steel structure itself is relatively stable. In addition, the self-weight of steel structure buildings is much lighter than other traditional buildings in the same region, so its seismic force effect is relatively small, and it is not easy to break in sudden earthquake compression, and has good application prospects in the application of earthquake-resistant buildings.
