Novel concrete filled steel tube stiffening mixed structure and construction method thereof

Abstract

The invention provides a novel concrete filled steel tube stiffening mixed structure and a construction method thereof. The novel concrete filled steel tube stiffening mixed structure comprises inner-layer steel plate assemblies, round steel pipe chord members, profile steel web members and outer-layer steel plate assemblies, wherein the inner-layer steel plate assemblies are an inner-layer tubular structure formed by splicing a plurality of steel plates to form the stiffening mixed structure, the plurality of round steel pipe chord members are uniformly arranged on the periphery of the inner-layer steel plate assemblies along the extension direction of the tubular structure of the inner-layer steel plate assemblies, the profile steel web members are connected to two adjacent round steel pipe chord members to form a stiffening structure for the round steel pipe chord members, the outer-layer steel plate assemblies are laid on the outer sides of the round steel pipe chord members and the profile steel web members, and concrete is poured inside the round steel pipe chord members and between the inner-layer steel plate assemblies and the outer-layer steel plate assemblies. According to the novel concrete filled steel tube stiffening mixed structure and the construction method thereof, by reasonably arranging a combination form of the concrete filled steel tube structure, the contribution of the concrete filled steel tube to the flexural rigidity and flexural bearing capacity of the structure is exerted, and the reinforced concrete structure is wrapped around the concrete filled steel tube structure, so that a conventional steel tube structure is effectively prevented from being corroded by the environment, the novel concrete filled steel tube stiffening mixed structure and the construction method thereof have the advantages of high bearing capacity, good ductility, excellent anti-seismic property, good corrosion resistance and the like.

Description

technical field [0001] The invention relates to the technical field of structural engineering, in particular to a novel concrete-filled steel tube reinforced hybrid structure and a construction method thereof. Background technique [0002] In the existing structural engineering, the structural forms adopted include steel structure, reinforced concrete structure and steel pipe concrete structure. There is a serious problem of insufficient stability in steel structures, and the section is often increased to meet the stability requirements, reducing economic benefits; reinforced concrete structures are prone to cracks under eccentric stress conditions, causing the structure to lose its bearing capacity prematurely; The steel tube concrete structure can realize the combined effect between the steel tube and the concrete, and give full play to the characteristics of the two materials, but the steel tube is located in the center of the section, and the contribution to the flexural...

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Problems solved by technology

[0003] The present invention proposes a new type of concrete-filled-steel reinforced composite structure, which is used to solve the serious problem of insufficient stability of the steel structure in the prior art. The existing steel structure tends to increase the section in order to meet the stability requirements and reduce the defect of economic benefit , by rationally arranging the structural form of steel tube concrete, the contribution of steel tube concrete to the structural flexural rigidity and flexural bearing capacity can be fully utilized, and the reinforced concrete structure is outsourced to the steel tube concrete structure, which effectively avoids the conventional steel tube structure from being subjected to environmental corrosion. High bearing capacity, good ductility, excellent shock resistance and good corrosion resistance

[0004] The present invention also proposes a construction method for a new type of concrete-filled-steel reinforced composite structure, which is used to solve the serious problem of insufficient stability of the steel structure in the prior art. Due to the shortcomings of economic benefits, by combining the rationally arranged stiffened mixed structure, the new steel tube concrete stiffened mixed structure can improve the bending stiffness and bending bearing capacity of the structure, and can effectively improve the construction efficiency, shorten the construction period, and improve the construction quality

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