Corrugated steel pipe concrete overlapped component and manufacturing method thereof

Abstract

The invention discloses a corrugated steel pipe concrete overlapped component and a manufacturing method thereof. The component comprises reinforced concrete and a steel pipe arranged inside the reinforced concrete and is characterized in that the steel pipe is a corrugated steel pipe, the directions of the wave crest and the wave trough of the corrugated steel pipe are perpendicular to the lengthdirection of the corrugated steel pipe or skew to the length direction of the corrugated steel pipe, core concrete fills the corrugated steel pipe, overlapped concrete with the thickness of 80 mm orabove is wrapped around the outer circumference of the corrugated steel pipe, and a reinforcement framework cage is arranged inside the overlapped concrete. According to the component, the bonding performance and the anti-seismic ductility of the steel pipe and the overlapped concrete can be improved, the bearing capacity of the component is improved, and the overlapped component can better adaptto the corrosion environment.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a corrugated steel tube concrete composite component and a manufacturing method thereof. Background technique [0002] With the rapid development of high-rise buildings, long-span bridges, marine engineering and underground engineering in China, the loads that buildings or structures need to bear are increasing, and the environment they are in is becoming more and more complex. Therefore, structural components have high bearing capacity. At the same time, it also needs to have good shock resistance and durability. [0003] The concrete-filled steel tube composite column has a high bearing capacity by setting a concrete-filled steel tube core column in the middle of the reinforced concrete section, so it is increasingly widely used in the above-mentioned engineering structures. However, the traditional CFST composite columns have the following problems: [0004] 1) The...

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Problems solved by technology

[0004] 1) The interface performance between the steel pipe of CFST and the external reinforced concrete is relatively poor, which affects the cooperative performance of CFST and external reinforced concrete;

[0005] 2) Under the action of repeated seismic loads and high axial forces, buckling of the inner steel pipes is easy to occur, and the buckling of the steel pipes will lead to premature spalling of the outer concrete, which will affect the normal test and reduce the seismic ductility of the composite column;

[0006] 3) In corrosive environments such as chloride salts, the external reinforcement of the composite column is prone to corrosion, and with the expansion and cracking of the external concrete by the corroded steel reinforcement, the internal steel pipe will be corroded, seriously affecting the bearing capacity and seismic ductility of the composite component.

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