Connection methods that Shandong membrane structure construction can take
During the construction of the Shandong membrane structure project, what kind of connection is used is a very important aspect. So, what are the connection methods we can use during construction? Let's take a look at this problem.
1. The method of Shandong membrane structure construction can be riveted: rivet connection was used in the 1920s. The rivet connection has good plasticity, toughness and integrity, small connection deformation, reliable transmission force, and good fatigue performance under dynamic load. It is particularly suitable for heavy-duty and structures that directly withstand dynamic loads. However, due to its complicated structure, large amount of steel, troublesome construction and high noise, it has been rarely used. The mechanical properties, structural requirements, and design methods of rivet connections are basically the same as those of ordinary bolt connections. The difference is that the design parameters and design values are different.
2. Welding: It is the main connection method. Welding connections can be divided into butt welds and fillet welds. Advantages: simple structure, any form of components can be directly connected; economical use of materials, does not weaken the section; easy production and processing, can achieve automatic operation; good tightness of the connection, large structural rigidity. Disadvantages: In the heat-affected zone near the weld, the metallographic structure of the steel changes, causing local material to become brittle; welding residual stress and residual deformation reduce the bearing capacity of the compression member; the welded structure is very sensitive to cracks. Initiation, it can easily be extended to the entire member section, and the problem of low temperature and cold brittleness is prominent.
3. Bolt connection: Due to the time-saving and labor-saving installation, simple installation equipment required, and less demanding skills of construction workers than welders, the current application of steel connection is second only to weld connection. There are two types of bolted connections: ordinary bolted connections and high-strength bolted connections. According to the force situation, it is divided into three types: shear bolt connection, Hang pull bolt connection and bolt connection that can bear shear and pull at the same time. The requirements of high-strength bolt pressure-bearing connection on bolt material, pre-tension force, construction and installation are exactly the same as those of the friction type, except that it is overcome by the friction force and the joint plate is relatively slipped. Destruction is the limit state of bearing capacity, so its bearing capacity is higher than that of high-strength bolt friction type connections, which can save connection materials.
What we have introduced above are the several connection methods that Shandong membrane structure construction can adopt. It is very important to pay attention to these issues. I hope the above introduction can bring you tips and help.
Tag: Shandong Membrane Structure Engineering
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