Development and Innovation of Steel Structure Building

Economic progress, the construction of the city is not backward. With the vigorous rise of high-rise buildings and the repeated improvement of building height, more and more people begin to pay attention to steel structure, because steel structure building has many advantages, such as high strength, light weight, good seismic performance, short construction period, low foundation cost, less occupied area and high degree of industrialization. However, compared with the concrete structure, a significant weakness of the steel structure is easy to conduct heat, when the steel surface temperature reaches more than 400 ℃, its strength and elastic modulus will be significantly reduced, and when the temperature reaches 600 ℃, the strength of the steel is almost zero. The fire resistance limit of bare steel is usually only 15 to 30 minutes. According to the requirements of our country's relevant building fire protection design specifications, the fire resistance limit requirements of the main load-bearing components of the building, such as columns, beams, walls, and floors, are 0.5 to 3.0 hours. Our country has expressly stipulated that fire prevention measures must be taken on the steel structure, and the corresponding national standards must be met to pass the acceptance.

There are a variety of fire protection methods for steel structures. In the past, cast-in-place solid concrete cladding was used, fire barriers were set up with refractory bricks, gypsum board was coated, or hollow pipes were filled with water for cooling. Now more is the use of spray fire retardant coating, anti-corrosion coating, fluorocarbon paint method to protect the steel structure. Because of the good fire insulation performance of this measure, the construction is not limited by the structure geometry, generally do not need to increase the auxiliary facilities, and the coating quality is light, there is a certain beautiful decoration effect, so it has been widely used.

In addition, there are steel structure stairs, steel structure steel frame, light steel structure, steel structure venue, steel structure field shed, steel structure ceiling, steel structure canopy, steel structure room canopy, steel structure advertising facilities, steel structure automobile exhibition hall, steel structure light box, power plant steel structure, airport facilities, etc.