A steel tube concrete column

Abstract

The invention discloses a steel pipe concrete column, which relates to the field of structural engineering and includes steel pipes, concrete and stiffeners. The inner wall of the steel pipe is provided with internal threads for the installation of the stiffeners. Filled with concrete. The outer side wall of the side reinforcing plate has an external thread, the stiffening plate has a through hole, and the position of the stiffening rib can be adjusted along the internal thread. The internal thread improves the bonding force between the steel pipe and the concrete, and the stiffening plate can prevent the relative slippage of the concrete and effectively restrain the cracking of the concrete. The stiffeners are easy to install, and the stiffeners strengthen the clamping effect of the steel pipe to prevent buckling and deformation of the steel pipe; increase the critical force of the steel pipe, thereby increasing the bearing capacity of the steel pipe; debonding phenomenon.

Description

technical field [0001] The invention relates to the field of structural engineering, in particular to a steel pipe concrete column. Background technique [0002] In the field of structural engineering, concrete has high compressive strength, but weak bending and shearing resistance; steel has strong bending resistance and good elastic-plastic properties, but steel is prone to instability when it is under compression, thus losing its axis. to the ability to resist pressure. In a traditional single steel structure building, the cross-sectional area of ​​the steel column is much smaller than that of the concrete column, resulting in the need to add more structural measures to ensure stability when designing the steel structure, resulting in cumbersome construction procedures. [0003] The concrete-filled steel pipe column composed of concrete injected into the steel pipe can combine the advantages of both in structure. The steel pipe has a restraining effect on the concrete f...

AI Technical Summary

Problems solved by technology

However, the arrangement of the stiffeners and stiffeners in the CFST column extends along the axial direction of the steel pipe and the extension length is the same as that of the steel pipe, which only improves the punching resistance of the CFST column against radial external forces, while for the axial load However, the capacity has not played a role in improving, nor can it effectively prevent the diameter of the circular steel pipe from being too large, and its installation process is too complicated, and its position cannot be adjusted after installation

In addition, the inner wall of the circular steel pipe is too smooth, and the cohesive force with the concrete is small, and it cannot be restrained from continuing to crack after the concrete cracks, resulting in the synergy between the circular steel pipe and the concrete not being well exerted

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