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Complete Composite Column of Steel Tube Concrete and Its Manufacturing Process

A steel tube concrete, fully combined technology, applied in the field of composite beams, can solve problems affecting the pressure bearing performance of composite structures

Active Publication Date: 2016-08-31
ZHEJIANG CTB WAVEFORM STEEL WEB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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. Provided is a method of pouring pre-pressed concrete in steel pipes, the steel pipes hold the pre-pressed concrete tightly, and part of the reaction force is applied to the steel pipes during pre-compression, so as to achieve the prestressed state of the steel pipes under tension and the tightness between the steel pipes and the concrete Contact, so that the concrete can realize the real three-way force, so that the components can reach the fully combined state of interaction under the load. The steel tube concrete fully combined column and its manufacturing process

Method used

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  • Complete Composite Column of Steel Tube Concrete and Its Manufacturing Process
  • Complete Composite Column of Steel Tube Concrete and Its Manufacturing Process
  • Complete Composite Column of Steel Tube Concrete and Its Manufacturing Process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Steel tube concrete completely combined column, such as figure 1 As shown, it includes a steel pipe 1 and concrete 2 in the steel pipe. The concrete 2 is pre-compressed concrete. One end of the steel pipe 1 is provided with a sealed end plate, and the other end of the steel pipe 1 is provided with a pressure-bearing fixed head plate. There are drainage or exhaust holes on the end. Pre-compressed concrete uses variable frequency vibration when pouring concrete, and pressurizes before initial setting, so that the concrete is in a state of compressive stress, and the surrounding steel pipes are in a state of tensile stress. Drainage or exhaust holes can also be provided on the head plate, and drainage or exhaust holes are provided on the steel pipe 1, so that the water and air generated during the solidification of the concrete in the steel pipe can be discharged through the holes close to it. In the concrete solidification stage, the basically closed steel pipe can limit t...

Embodiment 2

[0040] Steel tube concrete completely combined column, such as figure 2 As shown, it includes two steel pipes 1 and concrete 2 in the steel pipe. The concrete 2 is pre-compressed concrete. One end of the steel pipe 1 is provided with a sealed end plate, and the other end of the steel pipe 1 is provided with a pressure-bearing fixed head plate. 1 There are holes for drainage or exhaust. The drainage or exhaust holes are evenly distributed along the length of the steel pipe, so that when the concrete in the steel pipe is compressed, the water and air in the concrete are discharged from the nearest holes, which reduces the number of drain holes in the steel pipe in the prior art. The two ends of the pre-compressed concrete cause poor exhaust and drainage in the pre-compressed concrete, resulting in excessive water content and pores in the pre-compressed concrete, affecting the structural strength. On the other hand, the drainage and vent holes are arranged at the end of the steel...

Embodiment 3

[0048] Such as image 3 As shown, the difference between this embodiment and Embodiment 2 is that the surface roughness of the inner wall of the steel pipe is 310 μm. The two steel pipes 1 are welded by flat steel plates.

[0049] The concrete-filled steel tube complete composite column can also be composed of three or four steel pipes with concrete, which are welded by connecting pieces. The connecting pieces may be one or more combinations of corrugated steel webs, flat steel plates, and section steels.

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Abstract

The invention relates to a combination in the civil engineering, and discloses a completely-concrete-filled composite tubular steel column and a making technology thereof. The completely-concrete-filled composite tubular steel column comprises one or more steel tubes and concrete in the one or more steel tubes, the concrete is pre-stressed concrete, an end closing plate is arranged at one end of each steel tube, a bearing fix end closing plate is arranged at the other end of each steel tube (1), and each steel tube (1) or an end portion thereof is provided with a water or air outlet. The making technology comprises the following steps: welding the steel tube end closing plate, carrying out vibration pouring of the concrete in the steel tube(s), disposing the other end closing plate, welding the end closing plate, and carrying out pressurization solidification of the concrete. The concrete shrinks and creeps, and the steel tube elastically deforms, so there is a gap between the concrete and the steel tube, and the effects of the steel tube cannot be completely performed in the initial loading action phase. The structure of the column in the invention solves a false combination of the steel tube and the concrete in a combination structure, and realizes a best complete combination of a steel tube and the concrete combined structure.

Description

Technical field [0001] The invention relates to a composite beam in civil engineering, in particular to a steel tube concrete complete composite column 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. The false image combination results in the failure to reach the ideal load-bearing state when the structure is stressed, resulting in a redistribution of stress. When the steel tube and concrete are closely connected, the bearing capacity of the composite structure can obviously exceed the sum of the bearing capacity of the steel tube and the concrete bearing capacity, and when there is a gap between the steel tube and the concrete, the actua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04C3/293
Inventor 孙天明刘保成
Owner ZHEJIANG CTB WAVEFORM STEEL WEB