Thin-wall concrete-filled steel tube column separated by tension and compression and its construction method

Abstract

The invention discloses a thin-walled steel pipe concrete column separated by tension and compression, which comprises a lower steel pipe, a fixed ring plate, a sliding ring plate, a socketed steel pipe, an end-sealing steel plate, an upper steel pipe and a connecting steel plate; the lower steel pipe is filled with concrete; the fixed ring plate is welded on The upper part of the lower steel pipe, its free end surface is flush with the top surface of the lower steel pipe; the sliding ring plate is arranged under the fixed ring plate, and the sliding ring plate can slide up and down along the length direction of the lower steel pipe; the end-sealing steel plate is supported on the concrete; The lower part of the steel pipe is connected with the sealing steel plate, and the upper part is connected with the connecting steel plate; the upper end of the sleeved steel pipe is connected with the connecting steel plate, and the lower end is connected with the sliding ring plate. The invention also provides a construction method for the tension-compression separation thin-walled steel pipe concrete column. The invention is applicable to low-rise or multi-story civil building structures, which makes the division of labor between the lower steel pipe and the inner core concrete simpler and clearer, avoids premature buckling of the lower steel pipe, and makes it have the characteristics 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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