The steel structure is good and light, and can be disassembled and used for many times, but the rust prevention function is poor.
Characteristics of steel structure
1, high strength and light weight.
Steel has high strength and high 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 cross section, light weight, convenient transportation and installation, and is suitable for structures with large span, high height and heavy load.
2. The steel has good toughness and 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 steel is uniform and close to isotropic isotropic body. The actual working performance of steel structure accords with the calculation theory. So the reliability of steel structure is high.
3. The manufacture and installation of steel structure is highly mechanized.
Steel structure members are easy to manufacture in factory and assemble on site. Factory mechanized manufacturing of steel structure members has high precision, high production efficiency, fast on-site assembly speed and short construction period. Steel structure is the most industrialized structure.
4. The steel structure has good sealing performance.
Because the welding structure can be completely sealed, it can be made into high-pressure containers, large oil tanks, pressure pipes and so on with good air tightness and water tightness.
5. Is the steel structure heat-resistant or fire-resistant?
When the temperature is lower than 150℃, the properties of steel have little change. Therefore, the steel structure is suitable for high-temperature workshops, but when the radiation on the surface of the structure is about 150℃, it should be protected by heat insulation board. When the temperature is between 300℃ and 400℃, the strength and elastic modulus of steel decrease significantly, and when the temperature is around 600℃, the strength of steel tends to zero. In buildings with special fire protection requirements, steel structures must be protected by refractory materials to improve the fire resistance rating.
6. The corrosion resistance of steel structure is poor
Especially in wet and corrosive media, it is easy to rust. Generally speaking, steel structures should be derusted, galvanized or coated, and maintained regularly. For offshore platform structures in seawater, special measures such as "zinc block anode protection" should be taken to prevent corrosion.
7. Low carbon, energy saving, environmental protection and reusable.
Demolition of steel structure buildings will hardly produce construction waste, and steel can be recycled.