1, the material strength is high, its own light weight
Steel strength is high, elastic modulus is also high. Compared with concrete and wood, its density and yield strength ratio is relatively low, so under the same force conditions, the steel structure of the small cross-section, light weight, easy to transport and installation, suitable for large span, high height, Structure.
2, steel toughness, good plasticity, uniform material, high structural reliability
Suitable for impact and dynamic load, with good seismic performance. The internal structure of the steel is uniform and close to the isotropic homogeneous body. The actual working performance of steel structure is more consistent with the calculation theory. So the steel structure is highly reliable.
3, steel construction and installation of a high degree of mechanization
The steel structure is easy to manufacture in the factory, site assembly. Factory mechanized steel structure components high precision, high production efficiency, site assembly fast, short duration. Steel structure is the highest degree of industrialization of a structure.
4, steel structure sealing performance
As the welding structure can be completely sealed, can be made airtight, watertight are good high-pressure containers, large oil pools, pressure pipes and so on.
5, steel heat is not refractory
When the temperature below 150 ℃, the steel properties change is very small. So the steel structure for the hot workshop, but the structural surface by about 150 ℃ heat radiation, to be used to protect the insulation board. The temperature of 300 ℃ -400 ℃. Steel strength and elastic modulus were significantly decreased, the temperature at about 600 ℃, the strength of steel tends to zero. In buildings with special fire protection requirements, the steel structure must be protected with refractory material to improve the fire rating.
6, steel corrosion resistance is poor
Especially in wet and corrosive media environment, easy to rust. General steel structure to rust, galvanized or paint, and to regular maintenance. For marine platforms in seawater, special measures such as "zinc block anode protection" should be used to prevent corrosion.
7, low carbon, energy saving, green, reusable
Steel construction demolition almost no construction waste, steel can be recycled.