Large steel structures

The characteristics of large-scale steel structure engineering projects are:

1. Large steel structure buildings have a variety of systems, complex node structures, and various forms of welded joints. The welding technology in component production and on-site installation is becoming increasingly difficult.

2. Large steel structure engineering has high building height and large structural span, which requires high welding quality for the main steel structures in the design. For example, the connection welds between frame beams and columns, shear plates and columns, beam web plates and columns, and column splicing welds are the main parts of the structure, and they are basically groove penetration welds, which have very high requirements for welding quality.

3. There are various types and specifications of steel used, and an increasing trend is towards using low alloy structural steel and thick steel. With the continuous improvement of steel production technology, cast steel, austenitic stainless steel, and composite steel plates are also gaining more and more applications. Therefore, it is required to conduct real-time weldability tests on new steel grades, explore welding process parameters, and develop corresponding welding process measures based on the delivery status of the steel used before on-site construction.

4. There are many factors that link factory production and on-site installation, and there are many cross operations among different professions, making on-site installation difficult.

Steel structure is a type of building structure system in China. Compared with previous civil engineering structures, steel structure has strong toughness and good compressive strength, which has been welcomed by people. In steel structure design, the best design scheme should be selected to fully utilize the advantages of steel structure and ensure the rationality of the design. The design of nodes in steel structures determines the nature of industrial buildings, so the design of nodes should fully consider their rationality and the nature of the building. With the continuous development of construction materials, concrete construction has been replaced by rigid construction. Steel structures themselves have many advantages. Let's explore their advantages together.

1. The material is good and relatively uniform.

This is determined by the internal structure of the steel structure itself. The internal structure of the steel is close to isotropy, and the material of the steel is calculated according to mechanical assumptions. The fluctuation range of its material situation is relatively small, and it has good elasticity under stress.

2. Self weight is light.

Compared with reinforced concrete, steel has advantages, and its vertical component cross-sectional area is small, which increases the usable area of the building. Moreover, steel has toughness, good stability, and will not produce significant vibrations due to external fluctuations.