FRP pipe composite bar sea sand concrete column and preparation method thereof

A composite reinforced concrete and composite reinforced technology, which is applied in the fields of port and island engineering, bridge engineering, and structural engineering, can solve the problems of FRP reinforced non-compressive, sudden damage, etc. Strength-enhancing effect

Pending Publication Date: 2018-12-28
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] FRP bars (Fiber Reinforced Plastics Bars, fiber composite materials) are corrosion-resistant, high in longitudinal tensile strength, light in weight, and good in electromagnetic insulation, but their materials are brittle and break suddenly; their stress-strain relationship is linear, there is no yield platform, and their transverse strength It is about one-tenth of the longitudinal strength, so the FRP reinforcement is not compressive and cannot be directly used as the longitudinal reinforcement in the column

Method used

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  • FRP pipe composite bar sea sand concrete column and preparation method thereof
  • FRP pipe composite bar sea sand concrete column and preparation method thereof
  • FRP pipe composite bar sea sand concrete column and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0065] A kind of FRP pipe composite bar sea sand concrete column, such as Figure 1 to Figure 3 As shown, it includes FRP-steel composite reinforcement cage, FRP pipe 5 sleeved outside the FRP-steel composite reinforcement cage, and concrete 4 filled in the FRP-steel composite reinforcement cage and between the outer FRP pipe 5; FRP - The steel composite reinforcement cage is formed by the FRP-steel composite reinforcement 1 and the spiral stirrup 2 surrounding the outside of the FRP-steel composite reinforcement 1 .

[0066] The hoop constraint force provided by the outer FRP pipe 5 not only significantly improves the bearing capacity of the concrete column, but also ensures the anti-corrosion performance of the overall structure of the concrete column. The FRP-steel composite bar 1 and the spiral stirrup 2 surrounding the FRP-steel composite bar 1 form an FRP-steel composite reinforcement cage skeleton. The FRP pipe 5 is a GFRP pipe. The FRP pipe 5 can be in the shape of a...

Embodiment 2

[0072] Such as Figure 5 As shown, in order to further enhance the comprehensive performance of the FRP pipe composite reinforced concrete column, on the basis of Example 1, in the FRP-steel composite cage, the upper and lower ends of the FRP-steel composite reinforcement 1 are provided with reinforcement stirrups 3, so as to Further improve the restrained longitudinal force of the FRP pipe composite reinforced sea-sand concrete column, and further improve the compressive bearing capacity of the concrete in the core area.

Embodiment 3

[0074] The preparation method of the FRP pipe composite reinforcement sea-sand concrete column of embodiment 1 may further comprise the steps:

[0075] S1. Apply adhesive epoxy resin on the outer surface of the steel bar. The thickness of the adhesive is 0.5 mm. The fully impregnated fibers are drawn from the resin tank to wrap the entire steel bar to form an FRP fiber layer, which is passed through a pultrusion die, and then Straighten through a stretching machine so that the direction of the fiber is consistent with the direction of the steel bar, and then the fiber is spirally wound, bonded with sand, and left to stand to obtain the FRP-steel composite bar.

[0076] S2. According to the size of the specific column and the requirements of bearing capacity, select the FRP-steel composite bar with the corresponding diameter, bind it with a FRP spiral steel bar or a spiral steel bar wrapped with fiber cloth to form an FRP-steel composite reinforcement cage, and position the FRP-...

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Abstract

The invention provides an FRP pipe composite bar sea sand concrete column and a preparation method thereof. The concrete column includes an FRP-steel composite bar cage, an FRP pipe and concrete. TheFRP steel-composite bar cage is formed by an FRP-steel composite bar and a spiral stirrup wound around the outside of the FRP-steel composite bar. The FRP steel-composite bar includes a steel bar andan FRP fiber layer coated on the outer surface of the steel bar. When the concrete column is subjected to axial pressure, the steel bar in the FRP-steel composite bar exerts the compression resistance. When the column is biased, the FRP-steel composite bar placed on the tension side can not only exert high tensile strength of an FRP material but also take advantages of the high tensile strength and good ductility of the steel. Correspondingly, the steel bar in the FRP-steel composite bar on the pressure side exerts the compression resistance, high modulus of elasticity, good ductility and outstanding anti-corrosion performance can be achieved, and seawater and sea sand not desalinated can be used directly.

Description

technical field [0001] The invention belongs to the fields of structural engineering, bridge engineering, port and island engineering. More specifically, it relates to an FRP pipe composite reinforced sea-sand concrete column and a preparation method thereof. Background technique [0002] According to the statistical analysis of China's commercial concrete data, the use of ready-mixed commercial concrete in my country is increasing rapidly every year. As one of the components for preparing concrete aggregates, the mining of river sand has caused serious damage to the ecological environment. Sea sand reserves are large and widely distributed, and high-performance sea sand concrete materials and structural systems that use sea sand instead of river sand have broad application prospects. However, the chloride ions contained in the sea sand can corrode the passivation film of the steel bar, resulting in a decrease in the stress area of ​​the steel bar and a sharp degradation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/44E04C5/00
CPCE04C3/44E04C5/00
Inventor 郭永昌魏飞飞李天姿郭俊韬谢志红
Owner GUANGDONG UNIV OF TECH
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