Pulling and pressing separated thin-walled steel tube concrete column and construction method thereof

Abstract

The invention discloses a pulling and pressing separated thin-walled steel tube concrete column. The pulling and pressing separated thin-walled steel tube concrete column comprises a lower steel tube, a fixed ring plate, a sliding ring plate, a sleeving steel tube, an end sealing steel plate, an upper steel tube and a connecting steel plate; the lower steel tube is filled with concrete; the fixed ring plate is welded to the upper portion of the lower steel tube; a free end surface of the fixed ring plate is parallel and level to a top end surface of the lower steel tube; the sliding ring plate is arranged below the fixed ring plate, and can slide up and down along the length direction of the lower steel tube; the end sealing steel plate is supported on concrete; the lower portion of the upper steel tube is connected with the end sealing steel plate; the upper portion of the upper steel tube is connected with the connecting steel plate; the upper end of the sleeving steel tube is connected with the connecting steel plate; and the lower end of the sleeving steel tube is connected with the sliding ring plate. The invention also provides a construction method of the pulling and pressing separated thin-walled steel tube concrete column. The pulling and pressing separated thin-walled steel tube concrete column is suitable for a low-layer or multi-layered civil construction structure, the lower steel tube and core concrete in the lower steel tube are stressed simply and clearly, and the lower steel tube is prevented from being buckled too early, and has features of high bearing capacity and good ductility.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a tension-compression separated thin-walled steel pipe concrete column and a construction method thereof. Background technique [0002] Concrete-filled steel pipe members refer to composite members formed by filling concrete in steel pipes. It is a new form of structural member developed by combining the advantages of steel pipe and concrete. Due to the excellent structural properties and high economic and technical indicators of CFST components, they are used more and more widely. [0003] Thin-walled concrete-filled steel pipe column is a new type of structural form composed of thin-walled steel pipes and concrete on the basis of traditional steel-filled steel pipe columns. The concrete filled inside the thin-walled steel pipe improves the local buckling strength and fire resistance of the thin-walled steel pipe. , anti-corrosion performance, and the thin-walled ste...

AI Technical Summary

Problems solved by technology

[0005] However, the related technology has the following problems in engineering practice: because the thin-walled steel pipe and the concrete in its inner core share the axial pressure, the thin-walled steel pipe is prone to local buckling, which causes a large reduction in the bearing capacity of the thin-walled steel pipe

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