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Steel structure is a structure composed of steel materials and is one of the main types of building structures. The structure is mainly composed of steel beams, steel columns, steel trusses and other components made of section steel and steel plates, and adopts rust removal and rust prevention processes such as silanization, pure manganese phosphating, washing and drying, and galvanizing. Welds, bolts or rivets are usually used to connect components or parts. Because of its light weight and simple construction, it is widely used in large workshops, venues, super high-rises and other fields. The steel structure is easy to rust. Generally, the steel structure needs to be derusted, galvanized or painted, and it needs to be regularly maintained.

The characteristics of steel are high strength, light weight, good overall stiffness, and strong resistance to deformation, so it is especially suitable for the construction of large-span, super-high, and super-heavy buildings; the material has good homogeneity and isotropy, and is ideal elasticity. It is in line with the basic assumptions of general engineering mechanics; the material has good plasticity and toughness, can have large deformation, and can withstand dynamic loads well; the construction period is short; its degree of industrialization is high, and it can be used for specialized production with a high degree of mechanization.

High-strength steel should be studied for steel structures to greatly improve its yield point strength; in addition, new types of steel should be rolled, such as H-beam (also known as wide-flange steel) and T-shaped steel and profiled steel plates to adapt to large-span structures and The need for super high-rise buildings.

In addition, there is no thermal bridge light steel structure system. The building itself is not energy-saving. This technology uses ingenious special connectors to solve the problem of cold and hot bridges in the building; the small truss structure allows cables and upper and lower water pipes to pass through the wall. Decoration is convenient.

Features of steel structure

1. High material strength and light weight
Steel has high strength and high modulus of elasticity. Compared with concrete and wood, the ratio of its density to yield strength is relatively low, so under the same stress conditions, the steel structure has a small cross-section and light weight, which is convenient for transportation and installation, and is suitable for large spans, high heights, and heavy loads. Structure.

2. Steel toughness, good plasticity, uniform material and high structural reliability
It is suitable for bearing shock and dynamic load, and has good seismic performance. The internal structure of steel is uniform, close to isotropic homogeneous body. The actual working performance of the steel structure is more in line with the calculation theory. Therefore, the reliability of the steel structure is high.

3. High degree of mechanization of steel structure manufacturing and installation
Steel structural members are easy to manufacture in factories and assemble on site. The factory mechanized manufacturing of steel structural components has high precision, high production efficiency, fast assembly speed on site, and short construction period. Steel structure is the most industrialized structure.

4. Good sealing performance of steel structure
Because the welded structure can be completely sealed, it can be made into high-pressure containers, large oil pools, pressure pipes, etc. with good air tightness and water tightness.

5. Steel structure is heat-resistant and not fire-resistant
When the temperature is below 150 °C, the properties of the steel change little. Therefore, the steel structure is suitable for hot workshops, but when the surface of the structure is exposed to heat radiation of about 150 ° C, it should be protected by a heat insulation board. When the temperature is between 300°C and 400°C, the strength and elastic modulus of the steel decrease significantly. When the temperature is around 600°C, the strength of the steel tends to zero. In buildings with special fire protection requirements, the steel structure must be protected by refractory materials to improve the fire resistance rating.

6. Poor corrosion resistance of steel structure
Especially in the environment of wet and corrosive media, it is easy to rust. Generally, the steel structure needs to be derusted, galvanized or painted, and it needs to be maintained regularly. For the structure of the offshore platform in seawater, special measures such as “zinc block anode protection” should be adopted to prevent corrosion.

7. Low carbon, energy saving, green and environmental protection, reusable steel structure building demolition will hardly produce construction waste, and steel can be recycled and reused.

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