L-shaped steel pipe recycled concrete specially-shaped column provided with perforated T-shaped ribs and manufacturing method

A technology of recycled concrete and special-shaped columns, which is applied in the direction of columns, pier columns, pillars, etc., can solve the problems of easy peeling between steel pipes and concrete, insufficient binding capacity of core concrete, and insufficient binding force of core concrete, so as to improve the overall work performance, Improve the effect of insufficient adhesion and reduce the cost of the project

Pending Publication Date: 2019-12-24
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, since the column mainly bears the axial pressure, when the concrete-filled steel tube special-shaped column reaches the ultimate bearing capacity, the steel pipes at the corners undergo plastic deformation, and the steel pipes and concrete in the middle of each limb of the special-shaped column are prone to peeling off or local instability
The research shows that the main reason for the above technical problems is that the binding force of the outer steel pipe to the core concrete is insufficient.
In the actual application at the present stage, in order to make up for the insufficient confinement of the steel pipe to the core concrete, structural measures such as welding studs or rectangular ribs on the inner wall of the steel pipe are mainly used, which is labor intensive and the effect is not ideal

Method used

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  • L-shaped steel pipe recycled concrete specially-shaped column provided with perforated T-shaped ribs and manufacturing method
  • L-shaped steel pipe recycled concrete specially-shaped column provided with perforated T-shaped ribs and manufacturing method
  • L-shaped steel pipe recycled concrete specially-shaped column provided with perforated T-shaped ribs and manufacturing method

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Experimental program
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Effect test

Embodiment 1

[0036] In this embodiment, the T-shaped ribs evenly and equidistantly open round holes on the web (see image 3 ), the opening process such as Figure 6 Shown: First, cut from one end of the web along the predetermined dotted line, then cut from the other end of the web along the predetermined dotted line. After the cutting is completed, two webs ① and ② are produced, and the two webs ① and ② are staggered and docked, so that the trough of the ① web is aligned with the peak of the ② web, and then combined in the horizontal section of the adjacent crest (valley) At the place, the two webs ① and ② are welded to form by butt full penetration weld. The formed web with round holes is as follows: Figure 7 shown. In this embodiment, due to the thicker L-shaped special-shaped column limbs, the T-shaped ribs with openings are welded to the inner walls of the two steel pipes opposite to the length direction of the limbs in a parallel manner (see figure 1 ), the T-rib spacing is 200...

Embodiment 2

[0038] In this embodiment, the T-shaped ribs have regular hexagonal holes evenly spaced on the web (see Figure 4 ), the opening process such as Figure 8 Shown: Cut from the right end of the web along the predetermined dotted line to produce two webs ① and ②, and stagger the two webs ① and ②, so that the half of the regular hexagonal hole on the ① web is aligned with the ② web There is half a regular hexagonal hole in the plate, and then, at the horizontal section where the two holes are connected, the two webs ① and ② are welded to form by using butt joint full penetration welds. The formed web with regular hexagonal holes is as follows: Figure 9 shown. In this embodiment, due to the small thickness of the L-shaped special-shaped column limbs, the open T-shaped ribs are welded to the inner walls of the two steel pipes opposite to the length direction of the limbs in a staggered manner (see figure 2 ), the T-rib spacing is 150 mm, and the height of the T-rib web section ...

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Abstract

The invention discloses an L-shaped steel pipe recycled concrete specially-shaped column provided with perforated T-shaped ribs and a manufacturing method. The specially-shaped column comprises an L-shaped steel pipe framework, a T-shaped rib framework, a reinforcing hoop framework and full recycled concrete; the L-shaped steel pipe framework is formed through welding of multiple steel plates; theT-shaped rib framework is formed through welding of two steel plates; holes are formed in webs; the perforated T-shaped ribs are welded to the inner walls of an L-shaped steel pipe in a parallel or staggered manner; the reinforcing hoop framework is a reinforcement cage formed through binding of a spiral stirrup and longitudinal bars; and all coarse aggregate of the full recycled concrete comes from waste concrete. According to the scheme, the carrying capacity of the full recycled concrete can be improved by the aid of the L-shaped steel pipe and the reinforcing hoop, so that the recycling extent of the waste concrete is increased; the bonding performance of the steel pipe and the full recycled concrete can be improved by the aid of the perforated T-shaped ribs, so that local buckling ofthe steel pipe is delayed; and meanwhile, the specially-shaped column can be prefabricated in a factory, no formwork is required during onsite construction, and the production efficiency and the quality of the full recycled concrete are improved.

Description

technical field [0001] The invention relates to a building component, in particular to an L-shaped concrete-filled steel tube special-shaped column using fully recycled concrete and open-hole T-shaped ribs, and belongs to the technical field of steel-concrete composite structures. Background technique [0002] With the rapid development of urban construction in my country, the reinforcement and repair of existing buildings, the continuous development and large-scale construction of new urban areas and residential quarters, and the new construction of municipal public facilities will generate a large amount of construction waste. In addition, every year in our country, a large number of building structures are demolished due to reaching the design service life. According to statistics, during the "Twelfth Five-Year Plan" period, the construction area demolished in my country is about 460 million square meters every year, and every 10,000 square meters of demolition projects w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/34E04C3/32C04B28/00
CPCC04B28/00E04C3/32E04C3/34C04B14/06C04B18/16C04B18/08C04B2103/302
Inventor 张向冈牛海成王兴国丁亚红陈旭杨健辉王文唱王彦伟
Owner HENAN POLYTECHNIC UNIV
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