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Corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column

A composite pipe and concrete technology, applied in the direction of columns, pier columns, pillars, etc., can solve the problems of composite columns not having corrosion resistance, poor brittle failure, complex implementation process, etc.

Inactive Publication Date: 2021-09-10
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent with the application number CN201821124170.0 disclosed a FRP pipe composite reinforced sea-sand concrete column on July 26, 2019. Although this structure avoids the corrosion problem caused by the use of steel bars, it successfully uses sea-sand Concrete, but the disadvantages of poor shear resistance and brittle failure of FRP materials have not been improved
The Chinese patent application number CN104389381A disclosed on March 4, 2015 a composite column, a manufacturing method of the composite column and a composite reinforcement method. CFRP cloth and concrete, composite columns have good fire and earthquake resistance performance, but the implementation process is more complicated, and composite columns do not have corrosion resistance

Method used

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  • Corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column
  • Corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column
  • Corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column

Examples

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Effect test

Embodiment 1

[0035] A corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column is manufactured by the method of the invention. The height of the high-strength steel pipe is 600mm, the diameter is 152mm, the wall thickness is 5mm, and the strength is Q345; the length of the cut CFRP cloth is 500mm, and the width is 600mm. The core concrete is marine aggregate seawater concrete, and the strength grade is C40. Specifically include the following steps:

[0036] (1) Fabrication of corrosion-resistant CFRP-high-strength steel composite pipe

[0037] The first step is to clean the dust and impurities on the inner and outer surfaces of the high-strength steel pipe, and keep the inner and outer surfaces of the high-strength steel pipe dry;

[0038]The second step is to cut and collage a required inner wall CFRP cloth according to the design requirements, and evenly coat the structural adhesive on the inner wall of the high-strength steel pipe ...

Embodiment 2

[0053] A corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column, which is composed of marine aggregate seawater concrete, high-strength steel pipes and CFRP cloth; the CFRP cloth is pasted on the inner and outer walls of high-strength steel pipes to form a CFRP-high-strength steel composite pipe, The marine aggregate concrete is filled in the CFRP-high-strength steel composite pipe. The manufacturing method of the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column includes the following three main steps: the inner wall of the high-strength steel pipe is pasted with CFRP cloth, the outer wall of the high-strength steel pipe is pasted with CFRP cloth and filled with marine aggregate concrete; the specific steps are as follows :

[0054] Step 1) Calculate the inner wall area according to the inner diameter of the high-strength steel pipe, and then design the horiz...

Embodiment 3

[0069] The manufacturing method of the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column of this embodiment is the same as that of Example 1, wherein the marine aggregate seawater concrete is composed of the following raw materials in parts by weight: 400 parts of ordinary portland cement , 600 parts of coral coarse aggregate, 700 parts of sea sand, 200 parts of seawater, 30 parts of silica fume, 40 parts of fly ash, and 0.8 part of a water reducing agent, which is a polycarboxylic acid high-performance water reducing agent.

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Abstract

The invention discloses a corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column, and belongs to the technical field of marine construction engineering structures. The corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column is composed of marine aggregate seawater concrete, a high-strength steel pipe and CFRP cloth, wherein the CFRP cloth is pasted on the inner wall and the outer wall of the high-strength steel pipe to form a CFRP-high-strength steel composite pipe, and the CFRP-high-strength steel composite pipe is filled with the marine aggregate seawater concrete. The composite column can effectively prevent chloride ions from corroding the inner wall and the outer wall of the high-strength steel pipe, the related bearing index and durability of the high-strength steel pipe marine aggregate seawater concrete can be improved, and the service life of the high-strength steel pipe marine aggregate seawater concrete is prolonged.

Description

technical field [0001] The invention relates to the technical field of marine construction engineering structures, in particular to a corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column. Background technique [0002] Due to the gradual depletion of land resources on the earth and the continuous expansion of human living space, human beings have entered a period of large-scale development and utilization of the ocean. However, there are two fundamental problems in the construction and use of marine civil engineering, namely, the shortage of building materials and the shortening of the service life of building structures. The above problems have become the basic problems that limit the development of marine civil engineering construction. On the one hand, finding alternative materials that can be obtained locally, have suitable performance, and have abundant reserves can not only reduce the time cost and economic cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/36E04C5/01E04B1/64E04B1/58E04B1/38
CPCE04C3/36E04C5/01E04C5/015E04C5/012E04B1/642E04B1/58E04B1/38
Inventor 陈宗平周济庞云升徐炜圣覃伟恒
Owner GUANGXI UNIV
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