Hot-rolled H-beam has excellent mechanical properties and excellent service performance by rationally distributing the height-width ratio of section size according to different uses.
The design style is flexible and rich. In the case of the same beam height, the opening of steel structure is 50% larger than that of concrete structure, which makes the layout of the building more flexible.
The structure is light in weight. Compared with the self-weight of concrete structure, it is lighter, reduces the self-weight of structure, reduces the internal force of structure design, and makes the foundation treatment of building structure lower, the construction simple and the cost lower.
Hot-rolled H-section steel structure is scientific and reasonable in structure, good in plasticity and flexibility, high in structural stability. It is suitable for buildings with large vibration and impact loads, strong in resistance to natural disasters, especially for some buildings with multiple earthquake occurrence zones. According to statistics, among the world’s devastating earthquakes of magnitude 7 or above, steel structure buildings mainly made of H-section steel have the least degree of damage.
Increase the effective use area of the structure. Compared with concrete structure, steel structure column section area is smaller, which can increase the effective use area of buildings. Depending on the different forms of buildings, it can increase the effective use area by 4-6%.
Compared with welded H-section steel, it can obviously save labor and material, reduce the consumption of raw materials, energy and labor, and has low residual stress, good appearance and surface quality.
It is convenient for mechanical processing, structural connection and installation. It is also easy to be dismantled and reused.
H-section steel can effectively protect the environment, which can be embodied in three aspects: firstly, compared with concrete, dry construction can produce less noise and dust; secondly, due to the reduction of self-weight, less soil for foundation construction and less damage to land resources; moreover, a large number of concrete consumption can be reduced, and the amount of rock excavation can be reduced. Third, after the expiration of the service life of the building structure, the amount of solid waste generated after the structure demolition is small, and the recycling value of scrap steel resources is high.
Hot-rolled H-section steel structure has a high degree of industrialization, which is convenient for mechanical manufacture, intensive production, high precision, easy installation and quality assurance. It can be built into real housing factories, bridge factories, industrial factory building factories and so on. The development of steel structure has created and promoted the development of hundreds of new industries.
The construction speed is fast, the occupying area is small, and it is suitable for all-weather construction. The construction speed of steel structure made of hot-rolled H-beam is about 2-3 times that of concrete structure, the turnover rate of funds is doubled, the financial cost is reduced, and the investment is saved. Taking Jinmao Tower in Pudong, Shanghai, as an example, the main structure with a height of nearly 400 meters completed the structure capping in less than half a year, while the steel-concrete structure required two years.
About the author