What are the structural requirements of bolted connections in steel structures?

In the construction of steel structure bolts, the command and control accuracy of connectors is strict. Gas cutting and forced driving are not allowed in actual construction. The bolt hole diameter of steel structure bolt connection parts should meet the design requirements, which is irregular and irregular. Moreover, for the strong part of steel structure bolt, the structure of steel structure bolt connection is in accordance with strict requirements operation
1. The number of permanent steel structure bolts on the joint and one end of splicing joint of each member shall not be less than two;
2. Double nuts or other effective methods to prevent nuts from loosening should be used for the tension connection of ordinary bolts directly bearing dynamic load;

3. Because there is a large gap between grade C bolt and hole wall, it is only suitable for the connection under tension along the rod axis direction. Grade C bolts can also be used to bear shear force in secondary connections of structures subjected to static loads, connections of removable structures and installation connections for temporary fixed members.
4. When steel structure bolt connection is used, steel plate can only be used instead of section steel. (the bending rigidity of section steel is large, which can not guarantee the close combination of friction surface).
    ５。 In order to reduce the adverse effect of prying force on the tensile capacity of steel structure bolts, the stiffness of the end plate in bolt connection under tension along the axis of the rod should be properly enhanced.
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