What are the connection methods of prefabricated shop warehouse steel structures?

The connection methods of prefabricated shop warehouse steel structures include welding seam connection, bolt connection and rivet connection.

One. Weld connection

The welding seam connection of the steel structure is that the heat generated by the arc melts the electrode and the weldment locally, and then condenses into a weld after cooling, so that the weldment is connected as a whole.

Advantages: It does not weaken the section of the component, saves steel, has a simple structure, is easy to manufacture, has high connection rigidity, and has good sealing performance. It is easy to use automated operations under certain conditions, and the production efficiency is very high.

Disadvantages: The heat-affected zone of the steel near the prefabricated steel structure weld in the steel shop warehouse due to the high temperature of welding may be brittle in some parts. During the welding process, the steel is subjected to unevenly distributed high temperature and cooling, resulting in welding residual stress and residual deformation of the structure, which has a certain impact on the bearing capacity, stiffness and service performance of the structure. Due to the high rigidity of welded prefabricated shop warehouse steel structures, local cracks can easily expand to the whole once they occur, especially at low temperatures, which are prone to brittle fracture; the plasticity and toughness of weld connections are poor, and defects may occur during welding. reduce.

Two. Bolt connection

The bolted connection of the steel structure of the prefabricated store warehouse is to connect the connectors into one body through bolts, which are fasteners. There are two types of bolted connections in steel shop warehouses: ordinary bolted connections and high-strength bolted connections.

Advantages: simple construction process, convenient installation, especially suitable for site installation and connection, and easy to disassemble, suitable for structures that require assembly and disassembly and temporary connections.

Disadvantages: It is necessary to open holes on the plate and align the holes during assembly, which increases the manufacturing workload and requires high manufacturing precision. The bolt hole also weakens the cross-section of the component, and the connected parts often need to overlap each other or add an auxiliary connecting plate (or angle steel), so the structure is complicated and the steel is expensive.

Three. Rivet connection

Prefabricated store warehouse steel structure rivet connection is to use a rivet with a semi-circular prefabricated nail head at one end, burn the nail rod and quickly insert it into the nail hole of the connector, and then use a rivet gun to rivet the other end into a nail head. to secure the connection.

Advantages: riveted force transmission is reliable, plasticity and toughness are good, quality is easy to check and guarantee, and it can be used for heavy and directly bearing dynamic load structures.

Disadvantages: The riveting process is complicated, the manufacturing cost is labor and material, and the labor intensity is high, so it has been basically replaced by welding and high-strength bolt connections.