Spiral-stirrup square steel tube concrete column and manufacturing method thereof

Abstract

The invention relates to a spiral-stirrup square steel tube concrete column comprising a square steel tube, a spiral stirrup and concrete. The spiral-stirrup square steel tube concrete column is characterized in that the square steel tube is connected with the spiral stirrup by spot welding to form a spiral-stirrup square steel tube, and the concrete is directly cast into the spiral-stirrup square steel tube. The spiral-stirrup square steel tube concrete column integrates the advantages of a square steel tube concrete column and a round steel tube concrete column and has the advantages of simple node, convenience in processing, short construction period, convenience in the adotpion of fire-prevention plates and the like because the outer part of the spiral-stirrup square steel tube concrete column is the square steel tube; and because the spiral stirrup is arranged in the spiral-stirrup square steel tube concrete column, the restraining capacity of the square steel tube on the core concrete is enhanced so that the bearing capacity of the steel tube concrete column is increased, and the area of a column section is reduced. The spiral-stirrup square steel tube concrete column has simple production process and high production efficiency and is especially suitable for the structures of high-rise buildings.

Description

technical field [0001] The invention relates to a square steel tube concrete column, in particular to a square steel tube concrete column with spiral stirrups and a manufacturing method thereof. Background technique [0002] With the development of high-rise buildings, the structural form of CFST columns-H-shaped steel beams in composite structures has been adopted by more and more building structures. The cross-section forms of more concrete-filled steel pipe columns that are currently used include round steel pipe cross-sections and square steel pipe cross-sections. [0003] With the application in engineering, this structural form gradually shows some advantages and disadvantages of its own, mainly in the following aspects: [0004] 1. The structural form of square steel pipe concrete column-H-shaped steel beam has the advantages of simple joints, convenient processing, short construction period, and easy use of fireproof panels. It has its unique advantages in high-rise...

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Problems solved by technology

[0004] 1. The structural form of square steel pipe concrete column-H-shaped steel beam has the advantages of simple joints, convenient processing, short construction period, and easy use of fireproof panels. It has its unique advantages in high-rise buildings; Weaker than round steel pipes, the existing calculation theory believes that the bearing capacity of square steel pipe concrete is a simple superposition of the bearing capacity of the two materials, ignoring the hoop effect of square steel pipes on concrete

[0005] 2. In the structural form of circular steel pipe concrete column-H-shaped steel beam, the circular steel pipe has a strong restraining effect on the concrete, which can increase the actual compressive strength of the concrete, thus having the advantage of significantly improving its bearing capacity, but this structural form has the advantages of node making Complicated, not conducive to the realization of architectural effects, difficult to connect with building panels, etc.

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