Characteristics of steel structure in application

The steel structure usually loses its bearing capacity and deforms greatly in the temperature of 450 ~ 650 ℃, which leads to the bending of steel columns and beams. As a result, the steel structure can not continue to be used due to excessive deformation. Generally, the fire resistance limit of unprotected steel structure is about 15 minutes. The length of this time is also related to the speed of heat absorption. With the increase of high-rise steel structure buildings, especially some super high-rise buildings, steel structure materials are widely used. Once a fire accident occurs in a high-rise building, the fire can not be put out in a short time, which requires us to increase the fire protection of building materials in the architectural design, so as to enhance its fire resistance limit, and formulate necessary emergency plans inside the building, so as to reduce casualties and property losses.

There is a certain proportional relationship between the steel consumption of floor structure and lateral force resisting structure in steel structure house

1. Estimation of steel consumption of non seismic structure: a. the steel consumption of floor structure is not affected by the height of the building, which is generally 33kg / m2; b. The steel consumption of bearing column is directly proportional to the height of the building;

2. The steel consumption of aseismic structure is generally 1.5-2 times of that of non aseismic structure (according to fortification intensity and structure form);