High-rise steel structure technology
According to the building height and design requirements, the frame, frame support, tube and giant frame structure are respectively adopted, and its components can be steel, rigid reinforced concrete or concrete filled steel tube. Steel components are light and have good ductility, and can be welded or rolled steel, suitable for ultra-high-rise buildings; rigid reinforced concrete components have high rigidity and good fire resistance, suitable for middle and high-rise buildings or bottom structures; steel tube concrete construction is simple, Only used for column structure.
Space steel structure technology
The space steel structure has light weight, high rigidity, beautiful appearance and fast construction speed. Spherical joint flat grids, multi-layer variable cross-section grids and reticulated shells with steel pipes as members are the structural types with the largest amount of space steel structures in my country. It has the advantages of large space rigidity and low steel consumption. It can provide complete CAD in design, construction and inspection procedures. In addition to the grid structure, the space structure also includes a large-span suspension cable structure, a cable-membrane structure, and so on.
Light steel structure technology
Accompanied by a new structural form composed of light-weight colored steel plates made of wall and roof enclosure structures. A light steel structure system composed of large section thin-walled H-shaped steel wall beams and roof purlins welded or rolled by steel plates above 5mm, round steel made of flexible support system and high-strength bolt connection, the column distance can be from 6m to 9m, and the span can reach 30m or more, the height can reach more than ten meters, and can be equipped with light cranes. The steel consumption is 20-30kg/m2. There are standardized design procedures and specialized production enterprises. The products are of good quality, fast installation, light weight, low investment, and construction is not restricted by seasons. It is suitable for all kinds of light industrial plants.
Steel-concrete composite structure technology
The load-bearing structure of beams and columns composed of section steel or steel management and concrete components is a steel-concrete composite structure, and its application scope has been expanding in recent years. The combined structure has the advantages of both steel and concrete, with high overall strength, good rigidity, and good seismic performance. When the outer concrete structure is used, it has good fire resistance and corrosion resistance. Combined structural members can generally reduce the amount of steel used by 15-20%. The combined floor and concrete-filled steel tube components also have the advantages of less formwork or no formwork, convenient and fast construction, and great potential for promotion. It is suitable for frame beams, columns and floors of multi-storey or high-rise buildings with larger loads, and industrial building columns and floors, etc.
High-strength bolt connection and welding technology
High-strength bolts transmit stress through friction and are composed of bolts, nuts and washers. High-strength bolt connection has the advantages of simple construction, flexible dismantling, high bearing capacity, good fatigue resistance, good self-locking performance, and high safety. It has replaced riveting and partial welding in the project and has become the main connection method in the production and installation of steel structures. For steel components made in the workshop, automatic multi-wire arc submerged welding shall be used for thick plates, and electroslag welding techniques such as melting nozzle shall be used for box-shaped column partitions. During on-site installation and construction, semi-automatic welding technology, gas shielded flux-cored wire and self-shielded flux-cored wire technology should be used.
Steel structure protection technology
Steel structure protection includes fire protection, anti-corrosion, and rust prevention. Generally, anti-rust treatment is not required after the treatment of fire-retardant coatings, but anti-corrosion treatment is still required in buildings with corrosive gas. There are many types of domestic fireproof coatings, such as TN series, MC-10, etc. Among them, MC-10 fireproof coatings include alkyd enamel, chlorinated rubber paint, fluororubber paint and chlorosulfonated paint. During construction, appropriate paint and coating thickness should be selected according to steel structure type, fire resistance grade requirements and environmental requirements.
steel structure building