1.High material strength and lightweight, The steel has a high strength and a high modulus of elasticity. Compared with concrete and wood, the ratio of density to yield strength is relatively low. Therefore, under the same stress conditions, the steel structure has a small cross-section, lightweight, easy transportation, and installation, and is suitable for the large span, high height, and heavy bearing capacity. Structure.
2.Steel toughness, good plasticity, uniform material, high structural reliability, Suitable for impact and dynamic loads, with good seismic performance. The internal structure of the steel is uniform and close to the isotropic homogeneous body. The actual working performance of the steel structure is in line with the calculation theory. Therefore, the steel structure has high reliability.
3. The degree of mechanization of steel structure manufacturing and installation is high, Steel structural members are easy to manufacture at the factory and assembled on site. The mechanized manufacturing of steel structural members in the factory has high precision, high production efficiency, fast assembly speed and short construction period. The steel structure is the most industrialized structure.
4. The steel structure sealing performance is good, Since the welded structure can be completely sealed, it can be made into a high-pressure container with good airtightness and water tightness, a large oil pool, a pressure pipe and the like.
5. The 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 use in a hot workshop, but when the surface of the structure is subjected to heat radiation of about 150 ° C, it is protected by a heat shield. When the temperature is between 300 ° C and 400 ° C, the strength and elastic modulus of the steel are significantly reduced. 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 with refractory materials to increase the fire rating..
6. The steel structure is poor corrosion resistance, Especially in the environment of wet and corrosive media, it is easy to rust. General steel structures are to be rusted, galvanized or coated and regularly maintained. For the structure of the offshore platform in seawater, special measures such as “zinc block anode protection” are required to prevent corrosion.
7.Low carbon, energy saving, green and environmentally friendly, reusable, The demolition of steel structures will produce almost no construction waste, and the steel can be recycled and reused..
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