Complete Composite Beam of Steel Tube Concrete and Its Manufacturing Technology

Abstract

The invention relates to a composite beam in civil engineering, and discloses a concrete filled steel tube complete composite beam and a manufacturing technology thereof. The concrete filled steel tube complete composite beam includes a steel tube (1), concrete (2) inside the steel tube (1), a steel web and a bottom plate (4), wherein the steel web is a corrugated steel web (3); the corrugated steel web (3) is arranged between the steel tube (1) and the bottom plate (4); end sealing plates are arranged at the end parts of the steel tube (1); the corrugated steel web (3) is welded to the steel tube (1) through arc weld joints. The technology includes the steps of vibrating the placing concrete (2) in the steel tube (1), solidifying the concrete under pressure, welding the corrugated steel web (3) with the steel tube (1), and welding the bottom plate. According to the concrete filled steel tube complete composite beam and the manufacturing technology, provided by the invention, the problems that a clearance exists during the connection of concrete and the steel tube and the steel tube cannot acts fully at the initial phase of the load action are solved, so that the optimal state of the complete combination of the steel tube and concrete composite structure is reached.

Description

technical field [0001] The invention relates to a composite beam in civil engineering, in particular to a steel pipe concrete complete composite beam and a manufacturing process. Background technique [0002] At present, in concrete-filled steel tube composite beams, when concrete is poured into the steel tube, shrinkage and creep will occur after the concrete solidifies, and the volume of the concrete will decrease, resulting in a gap between the steel tube and the concrete, and the steel tube and the concrete cannot be tightly connected. When the steel pipe and concrete are closely connected, the bearing capacity of the composite structure can obviously exceed the sum of the bearing capacity of the steel pipe and the concrete bearing capacity, and when there is a gap between the steel pipe and the concrete, the actual bearing capacity of the composite structure can be smaller than the steel pipe The sum of the bearing capacity and the bearing capacity of concrete. Therefo...

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Problems solved by technology

[0003] The present invention aims at the disadvantages of the prior art that when concrete is poured into the steel pipe, shrinkage and creep will occur after the concrete is solidified, and the volume of the concrete will decrease, resulting in gaps between the steel pipe and the concrete, which will affect the pressure bearing performance of the combined structure. A corrugated steel web with good shear resistance is provided as the web, and steel pipes are poured with pre-pressed concrete at the same time. The corrugated steel web and the steel pipe are welded by arc-shaped welds, which makes the , the increase of the weld length is more conducive to the horizontal and vertical shrinkage of the steel pipe, so as to further hold the pre-compressed concrete tightly. During pre-compression, part of the reaction force is applied to the steel pipe, so as to achieve the prestressed state of the steel pipe under tension. The close contact between the steel pipe and the concrete makes the concrete realize the real three-way force, and achieves the close contact between the steel pipe and the concrete, so that the components can reach the fully combined state of interaction under the load. The steel pipe concrete fully composite beam and its manufacturing process

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