Introduction to steel structure construction of high-rise building

With the deep development of global urbanization, high-rise buildings have become a prominent symbol of the city skyline. They not only symbolize economic prosperity and technological progress, but also are the pinnacle of modern construction technology. Among many building materials, steel structure is more and more favored by architects because of its high strength, good flexibility and fast construction speed. However, with the rise of building height, how to ensure the stability, durability and safety of steel structure has become an important challenge facing architects. To solve these problems, it is necessary to study various key technologies of high-rise steel structure, from material selection to construction method, from connection technology to structural stability optimization.

Steel structure plays an important role in supporting the rise of high-rise buildings. How to choose proper steel and how to pretreat it are directly related to the stability and durability of buildings. In the choice of steel, the first consideration of its type and performance. Conventional steels, such as 0235 and 0345, are widely used because of their moderate strength and toughness, especially Q345, and are often used in structures subjected to large loads. For high-rise or super-high-rise buildings, high-strength steels such as 0390 or Q460 are favored for their superior strength and plasticity. In addition, taking into account the needs of certain specific environments, such as coastal areas or chemical corrosion environment, the choice of steel, such as weathering steel, stainless steel with good corrosion resistance is also crucial.

Of course, just choosing the right steel doesn't mean the job is done. In order to ensure that the steel in a long-term use to maintain good performance, pretreatment is particularly critical. In general, sandblasting is the most common form of pretreatment. This method can effectively remove the rust, old paint and impurities on the steel surface by high-speed sand spraying, and provide a better adhesion base for the coating. In addition, pickling treatment is also an effective method, it can be through acid solution immersion steel, remove the surface of iron oxide and impurities, make the steel surface more smooth. For certain steels, such as cold-rolled steel plates, phosphating treatment is also essential to enhance the adhesion of the coating to the substrate.