Interpretation of the characteristics of steel structures

1. High material strength and light weight: The 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 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 has good toughness, good 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, 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 structure components are easy to be manufactured in factories and assembled 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. The steel structure has good sealing performance: 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. The steel structure is not heat-resistant and refractory: When the temperature is below 150 °C, the properties of the steel change very 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 offshore platform structures in seawater, it is necessary to use“Zinc block anode protection”and other special measures to prevent corrosion. 7. Low-carbon, energy-saving, green and environmentally friendly, and reusable: The demolition of steel structure buildings hardly produces construction waste, and the steel can be recycled and reused.