Multi-cavity concrete filled steel tube combination column with built-in connecting plates and splicing method

Abstract

The invention discloses a multi-cavity concrete filled steel tube combination column with built-in connecting plates and a splicing method. The connecting plates are fixed inside rectangular steel tubes, then the multi-cavity steel tubes are welded with the connecting plates, and finally, concrete is filled in the steel tubes, thus the multi-cavity concrete filled steel tube combination column with built-in connecting pieces is formed. The multi-cavity splicing steel tube provided by the invention has the same width as the wall, so that the protruding of edges and corners of an indoor column is avoided, the usable area and aesthetics of the room can be enhanced, and the moment of inertia of the column section is large; compared with an ordinary concrete filled steel tube column, the multi-cavity concrete filled steel tube combination column has the advantages of high bearing capacity, good ductility, and high lateral force resisting performance.

Description

technical field [0001] The invention belongs to the field of steel pipe concrete composite columns of multi-storey and high-rise buildings, in particular to a multi-cavity steel pipe concrete composite column with built-in connecting plates and a splicing method. Background technique [0002] With the economic globalization and the improvement of urbanization level, the urban population density is gradually increasing, which makes a large number of high-rise buildings emerge continuously. There is an urgent need for new technologies to support the design and construction of high-rise and multi-storey buildings. [0003] Concrete filled steel tube utilizes the interaction between the steel tube and concrete in the process of stress, that is, the restraint of the steel tube on the concrete makes the concrete in a complex stress state, so that the strength of the concrete is improved, and the plasticity and toughness are greatly improved. At the same time, after the steel pipe...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned shortcomings, provide a multi-cavity concrete-filled steel pipe composite column with built-in connecting plates and a splicing method, solve the problem of protruding edges and corners in the traditional column chamber, and improve the bearing capacity and ductility of the multi-cavity concrete-filled steel pipe composite column , to delay or avoid the reduction of member stiffness, bearing capacity and ductility due to local buckling of the steel pipe wall plate, and give full play to the performance of the material

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