Built-in x-type opposite tension steel plate type welded rectangular steel tube concrete column and its construction method

Abstract

The invention discloses a built-in X-type double-drawn steel plate type welded rectangular steel pipe concrete column and a construction method, which comprises welding rectangular steel pipes and X-shaped double-drawn steel plates. The X-type double-drawn steel plate includes two pieces, which are respectively arranged at the two ends of the welded rectangular steel pipe; each X-shaped double-drawn steel plate is formed by X-shaped crossing of a main steel plate and two auxiliary steel plates, and passes through the X It is welded by the longitudinal seam of the type double-drawn steel plate; concrete is poured inside the structure assembled by welding the rectangular steel pipe and the X-type double-drawn steel plate. Through the effective division of the core concrete by the X-shaped tensioned steel plate, the binding ability of the welded rectangular steel tube to the core concrete is increased, which is conducive to improving the interface bond-slip performance of the welded rectangular steel tube concrete column, and makes the bond of the welded rectangular steel tube concrete column The strength and overall bearing capacity are significantly improved, saving steel and concrete materials.

Description

technical field [0001] The invention relates to a building component in a building structure and a construction method thereof, in particular to a built-in X-shaped opposite-drawing steel plate type welded rectangular steel pipe concrete column and a construction method thereof. Background technique [0002] Concrete filled steel pipe refers to the structural member in which concrete is filled in the steel pipe, and the steel pipe and its core concrete bear the external load together. Compared with reinforced concrete columns, in concrete-filled steel tube columns, the confinement effect of the steel tube on the concrete inside makes the concrete in a three-dimensional compression state, which improves the compressive strength of the concrete, and the concrete inside the steel tube can effectively prevent local buckling of the steel tube , The interaction between the steel pipe and the concrete makes the damage of the concrete inside the steel pipe change from brittle failur...

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Problems solved by technology

[0005] When the cross-section of the welded rectangular concrete-filled steel tube column is large, the core concrete in the steel tube is large in volume. After the mass concrete is poured, it will shrink during the setting and hardening process and release a large amount of hydration heat. The confinement effect of the core concrete is reduced, and the internal temperature of the core concrete is high, and the surface temperature is low. The core concrete is prone to defects such as bulging, cracks, and temperature deformation. performance is adversely affected

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