Aluminum alloy composite seawater concrete column with CFRP attached inside

A technology of concrete columns and aluminum alloys, applied in the directions of columns, piers, pillars, etc., can solve the problems of steel pipe corrosion, high chloride and sulfate content, and achieve the effects of improving bearing capacity, high tensile strength, and light weight

Pending Publication Date: 2021-11-02
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although sea sand is rich in reserves and its physical properties are similar to river sand, untreated sea sand has higher chloride and sulfate content than other sand and gravel due to years of immersion in seawater. One of the difficulties faced in applying seawater sea sand concrete to concrete filled steel pipe structures is the corrosion of steel pipes

Method used

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  • Aluminum alloy composite seawater concrete column with CFRP attached inside
  • Aluminum alloy composite seawater concrete column with CFRP attached inside
  • Aluminum alloy composite seawater concrete column with CFRP attached inside

Examples

Experimental program
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Effect test

Embodiment 1

[0030] An aluminum alloy composite seawater concrete column pasted with CFRP, such as figure 1 As shown, it is composed of seawater concrete, aluminum alloy pipe and CFRP cloth; the CFRP cloth is pasted on the inner wall of the aluminum alloy pipe to form a CFRP-aluminum alloy composite pipe, and the seawater concrete is filled in the CFRP-aluminum alloy composite pipe.

[0031] The composition ratio of the seawater concrete of the present embodiment is as follows: ordinary portland cement 487kg / m with a cement strength grade of 42.5 3 , sand 533kg / m 3 , Stone 1245kg / m 3 , Seawater 201kg / m 3 The sand is sea sand, specifically medium sand with a fineness modulus of 2.71; the stone is gravel with a particle size of 5 to 31 mm; the above components are stirred and mixed uniformly to obtain seawater concrete, and the seawater concrete The strength class is C40.

[0032] The aluminum alloy circular tube in this embodiment has a height of 600 mm, a diameter of 150 mm, and a wall...

Embodiment 2

[0041] The manufacturing method of the aluminum alloy composite seawater concrete column pasted with CFRP in this embodiment is the same as that in Example 1, and the composition ratio of the seawater concrete is as follows: Ordinary Portland cement with a cement strength grade of 42.5 480kg / m 3 , sand 530kg / m 3 , stone 1200kg / m 3 , Seawater 190kg / m 3 . The sand is sea sand, specifically medium sand with a fineness modulus of 2.71; the stone is gravel with a particle size of 5-31 mm; the above components are stirred and mixed uniformly to prepare seawater concrete.

Embodiment 3

[0043] The manufacturing method of the aluminum alloy composite seawater concrete column pasted with CFRP in this embodiment is the same as that in Example 1, and the composition ratio of the seawater concrete is as follows: Ordinary Portland cement with a cement strength grade of 42.5 490kg / m 3 , sand 540kg / m 3 , stone 1400kg / m 3 , Seawater 210kg / m 3 . The sand is sea sand, specifically medium sand with a fineness modulus of 2.71; the stone is gravel with a particle size of 5-31 mm; the above components are stirred and mixed uniformly to prepare seawater concrete.

[0044] Effect verification

[0045] In order to further illustrate that the aluminum alloy composite seawater concrete column pasted with CFRP of the present invention has mechanical performance characteristics such as high bearing capacity, the aluminum alloy composite seawater concrete column specimen with CFRP pasted inside prepared in Example 1 was subjected to an axial compression test, and the axial compr...

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Abstract

The invention discloses an aluminum alloy composite seawater concrete column with CFRP attached inside, and belongs to the technical field of marine building engineering structures. The aluminum alloy composite seawater concrete column with the CFRP attached inside is composed of seawater concrete, an aluminum alloy pipe and CFRP cloth; and the CFRP cloth is adhered to the inner wall of the aluminum alloy pipe to form a CFRP-aluminum alloy composite pipe, and the CFRP-aluminum alloy composite pipe is filled with the seawater concrete. According to the composite column, the aluminum alloy pipe and the CFRP are used as an external structure, and the use performance such as corrosion resistance, bearing capacity and shock resistance of the composite column structure can be remarkably improved through the restraining effect on internal concrete.

Description

technical field [0001] The invention relates to the technical field of marine construction engineering structures, in particular to an aluminum alloy composite seawater concrete column pasted with CFRP. Background technique [0002] At present, composite structures such as concrete filled steel tubes have been widely used in civil engineering due to their good mechanical and seismic performance. However, because steel tubes are susceptible to corrosion, resulting in high maintenance costs in the later period, steel tubes are used in seawater and other environments. Concrete has limitations. In recent years, the use of carbon fiber composite materials (CFRP) to improve the reliability of steel structures has attracted more and more attention from researchers. In existing studies, the high elastic modulus and excellent tensile strength of CFRP materials are mainly used to improve the buckling and post-buckling properties of steel members. However, most of the research is on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/30E04C3/34C04B28/00
CPCE04C3/30E04C3/34C04B28/00C04B2111/24C04B14/02C04B14/06C04B22/0026
Inventor 陈宗平徐炜圣庞云升覃伟恒周济
Owner GUANGXI UNIV
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