Analysis of Steel Structural Bolts
1、 Application of Steel Structure Bolts
Steel structural bolts are mainly used in steel Structural engineering to connect the connection points of steel structural steel plates. Steel structural bolts are high-strength bolts and are also a type of standard component. The fastening performance is relatively good, used in steel structures and engineering, to enhance the fastening effect. On general steel structures, the required steel structural bolts are grade 8.8 or above, as well as grade 10.9 and 12.9, all of which are high-strength steel structural bolts. Sometimes, the bolts on steel structures do not need to be electroplated, and it is OK to use the natural color.
2、 Classification of steel structural bolts
Steel structural bolts are divided into torsional shear type high-strength bolts and large hexagonal high-strength bolts. Large hexagonal high-strength bolts belong to the high-strength grade of ordinary screws, while torsional shear type high-strength bolts are an improved type of large hexagonal high-strength bolts for better construction
3、 Steel structure bolt construction
The construction of steel structural bolts must be initially tightened before final tightening. The initial tightening of steel structural bolts requires the use of impact type electric wrenches or torque adjustable electric wrenches; And there are strict requirements for final tightening of steel structural bolts. Final tightening of torsion shear type steel structural bolts must use torsion shear type electric wrenches, and final tightening of torque type steel structural bolts must use torque type electric wrenches
4、 Characteristics of Steel Structures
The steel structure system has comprehensive advantages such as light weight, factory manufacturing, fast installation, short construction period, good seismic performance, fast investment recovery, low environmental pollution, and high degree of industrialization. Compared with reinforced concrete structures, it has more unique advantages. On a global scale, especially in developed countries and regions, steel structures are widely used in various engineering constructions, such as steel bridges, steel factories, steel gates, various large pipeline containers, high-rise buildings, and tower rail structures. Steel structure installation process flow
1. According to the normal installation sequence and process requirements, the prefabrication and assembly of steel structures on the steel platform must ensure the quality of welding production.
2. The spacing between the flange plate splicing joint and the web plate splicing joint of the section steel should be greater than 200mm. The splicing length of the flange plate cannot be less than 2 times the plate width; The width of web splicing should not be less than 300mm, and the length should not be less than 600mm.
3. For the convenience of welding and to ensure welding quality, the reinforcing ribs, connecting plates, base plates, cantilever beams, etc. on the column and crossbeam should be assembled and welded on the ground steel platform according to the dimensions of the construction drawing as much as possible.
4. The prefabricated steel components on the steel platform should not only be manufactured and assembled according to the construction drawings and specifications, but also consider the process of on-site installation and changes in installation dimensions.
