Cold-bent multi-cavity concrete-filled steel tube special-shaped column and machining method thereof

Abstract

The invention provides a cold-bent multi-cavity concrete-filled steel tube special-shaped column and a machining method thereof. According to the machining method, a thin-wall steel plate is machinedinto a core column steel tube of the special-shaped column through cold bending and welding modes, the side face of the core column steel tube is used as a column branch connection face with the corecolumn steel tube as the center, U-shaped steel tubes formed through cold bending are sequentially welded to the column branch connection face, cavities of tube bodies of the steel tubes are filled with concrete, and the cold-bent multi-cavity concrete-filled steel tube which is in the shape like the Chinese character 'yi', in the L shape, in the T shape or in the cross shape. The cold-bent multi-cavity concrete-filled steel tube special-shaped column can effectively delay steel pipe buckling, meanwhile, compared with traditional concrete-filled steel tube special-shaped columns, through the multi-cavity structure, on the premise that the performance of components is ensured, the steel ratio is lower, and the economical efficiency is better.

Description

Technical field [0001] The invention belongs to the field of building structural components, and particularly relates to a steel-concrete composite structure frame column. Background technique [0002] Currently, special-shaped columns are widely used in houses, apartments, dormitories and other buildings. The special-shaped columns are flush with adjacent walls, making the building's indoor space regular, conducive to furniture placement and improving indoor space utilization efficiency. However, the currently widely used special-shaped reinforced concrete columns have stricter seismic design, and the design indicators such as the maximum service height and column axial compression ratio are much lower than ordinary rectangular reinforced concrete columns. The multi-cavity concrete-filled steel tube special-shaped column has good bearing capacity and ductility, and the built-in vertical partition can also effectively delay the occurrence of steel tube buckling. At the same time...

AI Technical Summary

Problems solved by technology

However, compared with the traditional rectangular and circular CFST columns, the particularity of the shape of the multi-cavity CFST special-shaped columns and the built-in vertical partitions have caused a lot of inconvenience in the prefabrication process of the factory.

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