What are the function of building fire protection of steel s
Release time:2020-07-18
Modern economy progress, from city to city construction is not lag behind. With the booming of high-rise buildings and building height of ascension, more and more people begin to pay attention to the steel structure, because the steel structure has high strength, light weight, good seismic performance, short construction period, low cost, less occupied area structure and industrialization degree higher advantages. However compared with concrete structure, steel structure of a significant weakness is easy to heat conduction, when the steel surface temperature of 400 ℃ above, the strength and elastic modulus will be dropped significantly, and when the temperature reaches 600 ℃, the strength of the steel structure steel is almost zero. The fire resistance of bare steel usually only 15-30 minutes, according to our country of building fire protection design specification requirements, construction of the main bearing components, such as the fire resistance of columns, beams, walls, floor, 0.5 -- 3.0 hours respectively. Our country has already stated must take on the steel structure fire prevention measures, and to meet the corresponding national standard to pass the acceptance.
Steel structure fire retardant treatment methods varied, outsourcing entities used is made of cast-in-situ forming concrete layer, with the fire barriers such as refractory brick, plasterboard cladding or adopt hollow tube filled water cooling method. Now more is with spray fire protection coatings, anticorrosive coatings, fluorocarbon lacquer methods to protect the steel structure. Because the measures of fire protection and heat insulation performance is good, construction structure geometry form without limit, generally do not need to increase the auxiliary facilities, and the coating quality is light, there are some beautiful adornment effect, etc., thus has been widely used.
Sweep view more