A post-earthquake-recoverable assembled cold-formed square steel tube column foot

Abstract

An assembled cold-bending square steel pipe column base capable of recovering after an earthquake comprises a connecting piece, an upper end plate, a lower end plate, a long rod bolt, a bottom plate,a square steel pipe short column and a square steel pipe column. The bottom plate is connected with the square steel pipe short column through the connecting piece, the bottom plate is fixed to the connecting piece through a bolt, each side face of the square steel pipe short column is provided with a vertical long circular bolt hole, the square steel pipe short column is fixed to the connecting piece through a friction type bolt, the upper end of the square steel pipe short column is connected with the lower end plate, the lower end plate is connected with the connecting piece through the long rod bolt, the periphery of the long rod bolt is sleeved with the square steel pipe short column, the square steel pipe column is connected with the upper end plate, and the upper end plate and the lower end plate are connected through a bolt. The assembled cold-bending square steel pipe column base is convenient to install, has quick recoverability, and is low in post-earthquake repair workloadand high in comprehensive economic benefit.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a post-earthquake recoverable assembled cold-bent square steel pipe column foot. Background technique [0002] Due to its excellent seismic performance, steel frames have been widely used in many high-frequency seismic regions in the world. Although the concept of "strong columns weak beams" has been put forward, and columns are usually designed to remain elastic, recent studies have found that irreversible damage caused by yielding occurs at the foot of columns after strong earthquakes. The column foot is one of the important connections in the steel frame. If the non-recoverable inelastic deformation occurs, it will cause the interstory displacement of the building that cannot be easily repaired, which will affect the normal use of the building in the later stage, resulting in high Reconstruction cost, and interrupting the normal use of buildings will also cau...

AI Technical Summary

Problems solved by technology

Although the concept of "strong column weak beam" has been put forward, and the column is usually designed to remain elastic, it has been found through recent research that irreversible damage caused by yielding occurs at the foot of the column after a strong earthquake

The column foot is one of the important connections in the steel frame. If the non-recoverable inelastic deformation occurs, it will cause the interstory displacement of the building that cannot be easily repaired, which will affect the normal use of the building in the later stage, resulting in high Reconstruction costs, and interrupting the normal use of buildings will also cause social and economic losses; therefore, traditional earthquake design concepts can no longer meet the modern society's requirements for building sustainability and recoverability

[0003] In order to solve the problem of high cost and difficulty in post-earthquake repairs, some scholars have proposed "post-earthquake recoverable structures", which refer to structures that can recover their functions after an earthquake without repairs or with a little repair. The aim is to mitigate the impact of interruptions in building use by enabling the building to quickly resume function

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