Characteristics of steel structure

1. High material strength and light weight

Steel has high strength and elastic modulus. 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 small section, light deadweight, convenient transportation and installation, and is suitable for structures with large span, high height, and heavy load.

2. Steel has good toughness, plasticity, uniform material and high structural reliability

It is suitable for bearing impact and dynamic load, and has good seismic performance. The internal structure of the steel is uniform, close to isotropic homogeneous body. The actual working performance of steel structure conforms to the calculation theory. Therefore, the reliability of steel structure is high.

3. High mechanization of steel structure manufacturing and installation

The steel structure members are easy to be manufactured in the factory and assembled on the construction site. The factory mechanized manufacturing of steel structure 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 vessels, 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 degree , the properties of steel change little. Therefore, the steel structure is suitable for the hot workshop, but when the structure surface is exposed to the thermal radiation of about 150 degree , it should be protected by the heat insulation plate. At 300 degree - 400 degree The strength and elastic modulus of steel decreased significantly, and the strength of steel tended to zero when the temperature was about 600 degree . In buildings with special fire protection requirements, steel structures must be protected with refractory materials to improve the fire resistance rating.

6. Poor corrosion resistance of steel structure

Especially in humid and corrosive medium environment, it is easy to rust. General steel structures shall be derusted, galvanized or coated, and shall be maintained regularly. For offshore platform structures in seawater, special measures such as "zinc block anode protection" shall be taken to prevent corrosion.

7. Low carbon, energy-saving, green and environment-friendly, reusable

The demolition of steel structure buildings will hardly produce construction waste, and the steel can be recycled.