Steel structure is a structure composed of steel materials, which is one of the main types of building structure. The structure is mainly composed of steel beams, steel columns, steel trusses and other components made of section steel and steel plates, and adopts silanization, pure manganese phosphating, washing and drying, galvanizing and other rust removal and antirust processes.The members or parts are usually connected by welds, bolts or rivets.Because of its light weight and simple construction, it is widely used in large factories, venues, super high-rise and other fields.Steel structure is easy to rust, general steel structure to rust, galvanized or paint, and to regular maintenance.
Steel is characterized by high strength, light weight, good overall stiffness, strong resistance to deformation, so it is especially suitable for the construction of large span and super high, super heavy buildings;The material has good homogeneity and isotropy and is an ideal elastomer, which most conforms to the basic assumptions of general engineering mechanics.The material has good plasticity and toughness, can have large deformation, and can bear the dynamic load well.Short construction period;With a high degree of industrialization, specialized production with a high degree of mechanization can be carried out.
High strength steel should be studied to improve the yield point strength of steel structure.In addition, new types of steel should be rolled, such as H-beam (also known as wide flange steel) and T-shaped steel and profiled steel plate to meet the needs of large span structures and super tall buildings.
In addition, there is no heat bridge light steel structure system, the building itself is not energy saving, this technology with ingenious special connecting pieces to solve the building hot and cold bridge problem;The small truss structure allows cables and upper and lower water pipes to pass through the wall, which is convenient for construction and decoration.
The characteristics ot the steel structure
1, the material strength is high, its weight is light
Steel has high strength and elastic modulus.Compared with concrete and wood, the ratio of its density and yield strength is relatively low, so under the same stress conditions, the steel structure member section is small, light weight, easy to transport and installation, suitable for large span, high height, bearing structure.
2, steel toughness, good plasticity, material uniformity, high structural reliability
Suitable for bearing impact and dynamic load, with good seismic performance.The internal structure of steel is uniform, close to the isotropic homogenous body.The actual working performance of steel structure conforms to the calculation theory.So the steel structure has high reliability.
3. The manufacturing and installation of steel structure is highly mechanized
Steel structure members are easy to manufacture in factory and assemble on site.The factory mechanized manufacturing of steel structure components has the advantages of high precision, high production efficiency, fast site assembly speed and short construction period.Steel structure is one of the most industrialized structures.
4, steel structure sealing performance is good
Because the welded structure can be completely sealed, it can be made into high pressure vessels with good air tightness and water tightness, large oil pools, pressure pipelines and so on.
5. Steel structure is heat-resistant and not fire-resistant
When the temperature is below 150℃, the properties of steel change very little.Therefore, steel structure is suitable for hot workshop, but the surface of the structure by about 150 degrees of thermal radiation, to be protected by heat insulation board.The temperature is between 300℃ and 400℃.The steel strength and elastic modulus decrease significantly, and the steel strength tends to zero when the temperature is about 600℃.In buildings with special fire protection requirements, steel structures must be protected with refractory materials to improve the fire resistance rating.
6, steel structure corrosion resistance is poor
Especially in the environment of wet and corrosive media, easy to rust.General steel structure to rust, galvanized or paint, and to regular maintenance.Special measures such as “zinc block anode protection” should be adopted to prevent corrosion of offshore platform structures in sea water.
7, low carbon, energy saving, green environmental protection, can be reused
The demolition of steel structures produces almost no construction waste and the steel can be recycled.
Post time: Jun-03-2021