Tree ring type high-strength concrete filled square steel tube column equipped with multiple spiral stirrups

Abstract

The invention discloses a tree ring type high-strength concrete filled square steel tube column equipped with multiple spiral stirrups. The tree ring type high-strength concrete filled square steel tube column comprises a square steel tube, the spiral stirrups, longitudinal bars, horizontal radiation steel bars and high-strength concrete, wherein the longitudinal bars and the spiral stirrups are bound or welded to constitute single-cylinder reinforcement cages; the single-cylinder reinforcement cages with different diameters are sleeved sequentially from large to small and are bound and welded with the horizontal radiation steel bars to constitute a reinforcement cage with a cylinder-in-cylinder structure; the reinforcement cage with the cylinder-in-cylinder structure is arranged in an inner chamber of the square steel tube, and the high-strength concrete is poured into the inner chamber of the square steel tube. The high-strength concrete filled column is simple in structure, convenient to construct, good in ductility, high in bearing force and excellent in seismic performance and is applicable to bearing columns of special structures such as super high-rise buildings, industrial heavy-duty workshops and other structures bearing heavy load.

Description

technical field [0001] The invention belongs to a vertical member of a load-bearing structure in the field of civil engineering, and in particular relates to an annual ring type high-strength concrete column with square steel tubes equipped with multiple spiral stirrups. Background technique [0002] In the field of civil engineering, building materials and material combinations have undergone diversified development. The most widely used materials are steel and concrete. According to the different combinations of steel and concrete, they are divided into three main types: reinforced concrete, section steel concrete, and steel pipe concrete. According to the strength of concrete, concrete is divided into ordinary concrete and high-strength concrete. [0003] Reinforced concrete with spiral stirrups belongs to reinforced concrete and is mainly used for circular frame columns and pile foundations. The characteristics of spiral stirrup reinforced concrete are: when the column ...

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Problems solved by technology

The characteristics of circular steel pipe concrete: the circular steel pipe has strong constraints on the core concrete inside, which makes the circular steel pipe concrete have the advantages of high bearing capacity, good ductility and superior seismic performance, but the circular section makes it unfavorable for architectural space layout and complex nodes. insufficient

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