Prefabricated in-fill concrete small-bore FRP tube reinforced concrete column structure and method

A reinforced concrete column and small-diameter technology, which is applied in building construction, building maintenance, construction, etc., can solve the problems of increasing the structure's self-weight, occupying a lot of building space, and long maintenance periods, achieving high bearing capacity, rigidity, and good ductility and durability, the effect of short labor time

Pending Publication Date: 2018-03-23
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This reinforcement method is widely used to strengthen beams, slabs, columns and other components in concrete structures. It has the advantages of simple principle, rich experience in use, reliable stress, and low cost. However, it also has the disadvantages of heavy wet work, long maintenance period, Disadvantages such as significantly increasing the weight of the structure and occupying more building space
The FRP winding constraint method wraps FRP in the circumferential direction of the concrete column section, so that the lateral expansion of the concrete under axial pressure is constrained, and a concrete column reinforcement method that improves the bearing capacity is achieved. This technology has the advantage of not significantly increasing the structure. Self-weight and section characteristics, however, this method is not effective in strengthening square or rectangular concrete columns

Method used

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  • Prefabricated in-fill concrete small-bore FRP tube reinforced concrete column structure and method
  • Prefabricated in-fill concrete small-bore FRP tube reinforced concrete column structure and method
  • Prefabricated in-fill concrete small-bore FRP tube reinforced concrete column structure and method

Examples

Experimental program
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Effect test

Embodiment 1

[0055] See figure 1 and figure 2 , in the embodiment of the present invention, the reinforced concrete column 1 to be reinforced is a square column, and its side length is 400 mm, the length of the prefabricated component 2 is 500 mm, and the width is 100 mm. The thickness of 5 is 0.333mm, and the original reinforced concrete column 1 is reinforced, and the specific implementation steps are as follows:

[0056] The reinforced concrete column 1 to be reinforced is inspected and repaired, and the outer surface of the original column is polished and cleaned up. The surface of the reinforced concrete column 1 can be polished with a commonly used pneumatic chisel machine. After grinding, use high-pressure water to remove the concrete impurities left by grinding. After the surface to be treated has been left to dry for at least one day, use a high-pressure air pump to blow off the surface to ensure its cleanliness.

[0057] Then paint the adhesive evenly on the treated surface as...

Embodiment 2

[0062] Such as image 3 and Figure 4 , in the embodiment of the present invention, the reinforced concrete column 1 to be reinforced is a cylinder with a diameter of 800mm, the inner diameter of the prefabricated component 2 is 800mm, and its outer diameter is 1000mm, and the outer diameter of the small-diameter FRP inner pipe 2 is 60mm, and the GFRP The thickness of cloth 5 is 0.333mm, and the original reinforced concrete column is reinforced, and the specific implementation steps are as follows:

[0063] The reinforced concrete column 1 to be reinforced is inspected and repaired, and the outer surface of the original column is polished and cleaned up. The surface of the reinforced concrete column 1 can be polished with a commonly used pneumatic chisel machine. After grinding, use high-pressure water to remove the concrete impurities left by grinding. After the surface to be treated has been placed and dried for at least one day, use a high-pressure air pump to blow the sur...

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Abstract

The invention discloses a prefabricated in-fill concrete small-bore FRP tube reinforced concrete column structure which comprises a plurality of prefabricated parts with adjacently-connected side faces; the inner surfaces of the prefabricated parts are connected with the outer surface of a reinforced concrete column, and the side faces of the multiple prefabricated parts are sequentially and horizontally connected to surround the periphery of the reinforced concrete column; a plurality of FRP inner tubes filled with self-compacting concrete are arranged inside the prefabricated parts in the axial direction of the reinforced concrete column. The invention further provides a method adopting the prefabricated in-fill concrete small-bore FRP tube reinforced concrete column structure. Comparedwith the prior art, the prefabricated in-fill concrete small-bore FRP tube reinforced concrete column structure has the advantages of being obvious in reinforcing effect, high in ultimate bearing capacity, large in ductility, high in corrosion resistance, convenient to construct and the like.

Description

technical field [0001] The invention relates to the technical field of reinforcement of reinforced concrete structures, in particular to a reinforced concrete column structure and method for prefabricated inner-filled concrete small-diameter FRP pipes. Background technique [0002] At this stage, a large number of in-service infrastructures need to be repaired and reinforced due to various reasons, such as degradation of material properties, changes in design requirements, and construction errors. However, the maintenance and reinforcement of these infrastructures requires a lot of money, so it has become a major challenge in the national economic development of various countries. [0003] Among the developed countries in Europe and the United States, the current investment in building reinforcement and transformation has accounted for more than 1 / 2 of the total investment in the national construction industry. According to the estimated data of the US Bureau of Statistics i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G23/02
CPCE04G23/0218E04G2023/0251
Inventor 涂强刘锋付兵李丽娟
Owner GUANGDONG UNIV OF TECH
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