Non-welded cold-bending bidirectional-hinged column base

Abstract

The invention provides a non-welded cold-bending bidirectional-hinged column base which comprises cold-bending formed steel plates arranged symmetrically pairwise, wherein the steel plates are fixedly connected through bolts. The non-welded cold-bending bidirectional hinge column base is simple to mount, free of welding for the entire column base, convenient to machine, free of welding and low in impact of residual stress; a unique extending bending design of the bottom realizes the bidirectional hinge of the column base; the column base has good rotation capacity to reduce the damage to the column base in the earthquake.

Description

technical field [0001] The invention relates to the field of anti-seismic technology of structural engineering, in particular to a non-welded cold-formed two-way hinged column base which utilizes a special structure of the steel column base to reduce damage to the column base. Background technique [0002] As the main load-bearing structure of the building, the pillar is an important part to ensure that the building will not fall under the action of an earthquake. However, in the earthquake, the columns, especially the column bases, have suffered a large degree of damage, and many of them are difficult to repair. The steel structure has the characteristics of light weight and high strength, and has advantages in earthquake resistance. However, the damage of steel column feet under earthquakes has also attracted more and more attention, especially in the 1994 Northridge earthquake in the United States and the 1995 Hanshin earthquake in Japan. The earthquake caused many beam-...

AI Technical Summary

Problems solved by technology

However, the rigidity of the above-mentioned three kinds of column feet is relatively large, and they will bear a large bending moment during the earthquake, especially the latter two, the ability of the column foot to rotate is very small, the ductility of the structure is poor, and the concrete at the bottom of the column is prone to crack and other forms of damage

The rotation capacity of the exposed steel column feet is better than that of the last two types. The damage is mainly due to the breakage of anchor bolts, which belongs to ductile damage, but the repair work is difficult, and it is difficult to directly reuse after the earthquake.

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