What are the regulations for high-strength bolt connections in steel structure?

High-strength bolt connection of steel structure is a common connection method in steel structure buildings. It has the advantages of reliable connection, simple construction and high bearing capacity. During the design and construction of steel structures, the regulations on high-strength bolt connections are an important guarantee for ensuring connection quality and safety. This article will introduce in detail the regulations for high-strength bolt connections of steel structures.

1. Material selection

High-strength bolt connections of steel structures require the use of high-strength bolts that comply with national or industry standards. When selecting materials, factors such as the strength grade, material quality, and mechanical properties of the bolt need to be considered. At the same time, it is necessary to pay attention to the anti-corrosion performance of bolts and choose appropriate anti-corrosion treatment methods according to the use environment.

2. Design requirements

The design of high-strength bolted connections for steel structures needs to follow relevant codes and standards to ensure that the bearing capacity, stiffness and stability of the connections meet the requirements. During the design process, it is necessary to consider the number, arrangement and connection methods of bolts to reasonably distribute and transfer loads to avoid stress concentration or excessive stress. At the same time, attention needs to be paid to the processing and installation accuracy of the connecting parts to ensure the quality of the connection.

3. Construction technology

The construction of high-strength bolt connections in steel structures requires strict compliance with relevant operating procedures to ensure connection quality and safety. During the construction process, it is necessary to pay attention to the installation sequence and tightening method of bolts to avoid installation errors or loose tightening. At the same time, construction quality inspection and acceptance need to be carried out to detect and deal with construction problems in a timely manner.

4. Quality inspection

After the high-strength bolt connection of the steel structure is completed, quality inspection is required to ensure that the connection quality meets the requirements. Quality inspection includes appearance inspection, dimensional inspection, pre-tension inspection, etc. The appearance inspection mainly checks the integrity of the connectors and the tightening of the bolts; the dimensional inspection mainly checks the diameter, length, spacing and other indicators of the bolts; the pre-tension force inspection mainly checks whether the pre-tension value of the bolts meets the design requirements.

5. Maintenance

High-strength bolted connections of steel structures require maintenance during use to extend their service life. During the maintenance process, you need to pay attention to regularly checking the tightening and integrity of the bolts to find and deal with problems in a timely manner. At the same time, attention needs to be paid to keeping the connections clean and dry to avoid corrosion and rust problems.

In short, high-strength bolt connection of steel structure is one of the important connection methods in steel structure buildings, and its design and construction need to strictly comply with relevant specifications and operating procedures. It is necessary to pay attention to details and quality control in terms of material selection, design requirements, construction technology, quality inspection and maintenance to ensure its safety and stability.