1) High-rise steel structure technology. Frame, frame-supported, cylinder, and giant frame structures are adopted according to building height and design requirements, with components available in steel, reinforced concrete with high strength steel bars, or concrete-filled steel tubes. Steel components are lightweight and have good ductility, allowing for welded or rolled steel sections, suitable for ultra-high-rise buildings; reinforced concrete with high strength steel bars components offer high stiffness and good fire resistance, ideal for mid to high-rise buildings or lower structures; concrete-filled steel tube construction is simple and is used only for column structures.
(2) Spatial Steel Structure Technology. Spatial steel structures are characterized by their light weight, high stiffness, and aesthetically pleasing designs, as well as rapid construction. The spherical node flat gridshell, multi-layer variable cross-section gridshell, and other structural forms using steel pipes as members are among the most widely used in our country's spatial steel structures. They offer the advantages of high spatial stiffness and low steel consumption, and are applicable in design, construction, and inspection procedures, with complete CAD support. In addition to gridshell structures, spatial structures also include large-span suspension cable structures, cable membrane structures, and more.
(3) Light Steel Structure Technology. Accompanied by the new structural form composed of lightweight colored steel plate walls and roof cladding. The light steel structure system consists of large-section thin-walled H-shaped steel wall beams and roof purlins,焊接或轧制于5mm+ steel plates, flexible support systems made of round steel, and high-strength bolts. The column spacing ranges from 6m to 9m, span can reach up to 30m or more, and height can reach several meters. It can also be equipped with light-duty hoists. Steel consumption is 20-30kg/m². There are now standardized design procedures and specialized production enterprises, with good product quality, fast installation, light weight, low investment, and construction not limited by seasons, suitable for various light industrial buildings.
(4) Steel-Concrete Composite Structure Technology. The steel-concrete composite structure refers to the load-bearing beams and columns composed of steel sections or steel management and concrete components. Its application scope has been expanding in recent years. This composite structure combines the advantages of both steel and concrete, offering high overall strength, good rigidity, and excellent seismic performance. When using an encased concrete structure, it also boasts superior fire resistance and corrosion resistance. The components of the composite structure can generally reduce steel consumption by 15% to 20%. Additionally, composite floor slabs and steel-tube concrete components have the advantages of minimal formwork or no formwork, and convenient and rapid construction, with significant potential for promotion. They are suitable for frame beams and columns, as well as floor slabs, in multi-story or high-rise buildings with heavy loads, and for columns and floor slabs in industrial buildings.
(5) High-strength bolt connection and welding techniques. High-strength bolts transfer stress through friction and consist of three parts: bolts, nuts, and washers. They offer advantages such as simple construction, flexible dismantling, high load-bearing capacity, excellent fatigue resistance and self-locking properties, and high safety. These bolts have replaced riveting and some welding in construction, becoming the primary means of connection in steel structure fabrication and installation. For steel components manufactured in the workshop, automatic multi-wire arc埋焊 should be used for thick plates, and melt-wire electroslag welding for box-shaped column spacers. During on-site installation, semi-automatic welding techniques, gas shielded welding wire, and self-protecting flux-cored wire technologies should be employed.
(6) Steel Structure Protection Technology. Steel structure protection encompasses fire resistance, corrosion prevention, and rust prevention. Generally, after fire-resistant coating, additional rust prevention is not required; however, corrosion prevention is necessary in buildings with corrosive gases. In China, there is a variety of fire-resistant coatings available, such as the TN series and MC-10. The MC-10 fire-resistant coating includes alkyd magnetic paint, chlorinated rubber paint, fluororubber coatings, and chlorosulfonated coatings. During construction, the appropriate coatings and coating thickness should be selected based on the steel structure type, fire resistance grade requirements, and environmental conditions.
News Center Co., Ltd.
