Tall steel structure building fire safety measures

Steel is a kind of not extinguish the building material, it has the earthquake, flexural properties. In practical application, the steel can be increased relative to the building's load ability, but also can satisfy the construction design aesthetic appearance of the demand, and also prevents concrete and other building materials can not be bent, stretched defect, therefore, steel under construction industry favorite, monolayer, multilayer, skyscrapers, factories, warehouses, waiting room, lounge and using steel are common. However, steel building materials in fire prevention as there are some difficult to prevent defects, its mechanical properties such as tensile strength, yield point, and elastic modulus are as the temperature rises fall. The high-rise steel structure building is increasing, especially in some high-rise building steel structure, the more common way. High-rise building once fire accident, fire is not in a short period of time we fight, this requests us in the architectural design, increase building materials fire maintenance, in order to strengthen the fire resistance limit inside the building, and develop the necessary emergency plan, in order to reduce the casualties and property losses. Shrinkage. Using steel structure fire retardant coating maintenance component, this approachWith the fire insulation performance is good, the construction is not influenced by the geometric shape steel structure the advantages and restrictions, in general do not need to add auxiliary equipment, and the coating quality of light, there is a certain aesthetic decorative effect, which belongs to the modern advanced technology of steel structure fireproof measures usually at 450 degrees Celsius ~650 degrees Celsius in temperature will lose its bearing capacity, attack large deformation of steel column, steel beam bending, lead to, result from excessive deformation and cannot continue to use, and maintenance of ordinary steel structure fireproof limit is 15 minutes. This time also and component absorbing speed. To make steel structure information in the practical application of restraint fire area the lack of, must stop fire disposal, its purpose is to steel structure fire resistance design progress to standard rules limiting range of steel structure in fire to avoid rapid warming episodes deformation collapse, its measure is varied, the key is to take different measures according to different conditions, such as the use of insulation, refractory barrier direct flame ignition steel structure, reduce the heat transmission speed delay steel structure temperature rise, the weakening of time. But no matter in what way, its principle is different. Therefore,The author thinks the ideal of 4 kinds of steel structure fire protection measures must be pay attention to. Outsourcing layer. Take the words too literally, is in the steel surface to add outsourcing layer, can cast-in-situ molding, may also use the spray method. Cast-in-situ molding concrete outer layer usually with wire mesh or steel to enhance, to limit the shrinkage crack, and to ensure the strength of the shell. Spraying method to on site for the steel structure surface smearing mortar to form maintenance layer, mortar can be cement lime or gypsum mortar, also can be incorporated with perlite or asbestos. At the same time, outsourcing layer can also use perlite, asbestos, asbestos cement, gypsum or light made of concrete prefabricated plate, using adhesive, nails, bolts in steel structure. Water jacket hollow type steel structure filled with water is resistant to fire the most effective protection measures. This approach can make the steel structure in fire to low temperature, the water in the steel structure inner loop, absorbing its heating heat. The heated water cooling to stop recycling or by pipes into cold water to replace the heated water shield steel structure set in refractories consisting of a wall or ceiling, or member wrapped in two