In the steel structure system, high strength bolts are the key connectors to ensure the stability and reliability of the structure, and their performance advantages determine their wide application in many important parts.

1.Connection Node of Steel Beam and Steel Column

The connection of steel beam and steel column is the foundation of building steel structure frame, which bears huge vertical and horizontal loads. High-strength bolts are used here to connect the beam flange and web with steel columns, forming rigid or semi-rigid connection nodes. Taking high-rise steel structure building as an example, under the effect of earthquake, beam and column nodes need to withstand repeated tensile pressure and bending moment, high strength bolts by virtue of strong preload and shear, tensile capacity, to ensure that the node in the complex stress state does not slip, loosening, to ensure that the structure of the integrity and stability. Compared with welding, high-strength bolt connection is convenient to install, which can effectively shorten the construction period, and it is easy to dismantle and replace in the later maintenance or transformation.

2.Support system connection parts

The support system is an important part of the steel structure to resist horizontal loads (e.g. wind and seismic forces), and the connection points between the support and the main structure are crucial. In towering TV towers, large bridges and other structures, the support is firmly connected to the main structure through high-strength bolts. When the structure is subjected to horizontal force, the support transmits the force to the main structure, and the high-strength bolts ensure the effective transmission of the force by virtue of their reliable connecting performance, preventing the support from detaching from the main structure, and avoiding the destabilisation damage of the structure due to excessive horizontal displacement.

3.Node Connection of Steel Joist

Steel joist is commonly used in large-span buildings and bridge structures, and its node is the key part of the intersection force of each rod. Take railway steel truss bridge as an example, under the action of dynamic load generated by train travelling, truss node has to bear alternating stress. High-strength bolts connect the rods closely to ensure that the geometry of the nodes remains unchanged under complex stresses and maintain the structural stability of the whole truss. At the same time, it is convenient to use high strength bolts for quick assembly at the construction site, which improves the construction efficiency and reduces the construction difficulty.

4.Space Structure Connection

In all kinds of space structure, such as roof cover of large space building like stadium, exhibition hall, etc., high strength bolts are the core connectors. The net frame consists of many rods and nodes, and the rods are connected with the nodes through high-strength bolts to form a stable space structure. The roof cover of the stadium needs to withstand self-weight, wind load, snow load, etc., high-strength bolts can ensure that the rods work together to withstand the load. Moreover, their detachable characteristics provide great convenience for later maintenance and transformation, and play an irreplaceable role in the whole life cycle of space structure.

High-strength bolts play an irreplaceable role in the key connection parts of steel structures, from the basic beam-column connection to the support system, steel trusses and complex space structures, all of which rely on their reliable connection performance to ensure structural safety. With the continuous progress of construction technology, the performance and application of high-strength bolts are continuously optimised, providing solid support for the development of steel structure buildings.