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Expanded end head for anchoring FRP rib, processing method and anchoring method

It is a technology of expanding the end and anchoring, which is applied in the direction of building reinforcements, structural elements, building components, etc. It can solve the problems of difficulty in guaranteeing anchoring performance and limited length of FRP inserted into the node, and achieve the solution of insufficient anchoring length, reliable bonding, The effect of dense bonding

Active Publication Date: 2019-10-08
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Most of the existing anchoring methods are to extend the FRP tendon into the node for a certain length to ensure that the end does not slip, but the length of the FRP into the node in the actual structure is limited, and this method is difficult to ensure the stability of the anchoring performance

Method used

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  • Expanded end head for anchoring FRP rib, processing method and anchoring method
  • Expanded end head for anchoring FRP rib, processing method and anchoring method
  • Expanded end head for anchoring FRP rib, processing method and anchoring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] An enlarged end for FRP tendon anchoring, including an inner layer and an outer layer, the outer layer includes: fiber: 60 parts by mass; thermosetting resin: 40 parts by mass; the inner layer includes: two-way fiber cloth: 40 parts by mass; Thermoplastic resin: 60 parts by mass; fiber is continuous fiber; thermosetting resin is epoxy resin; thermoplastic resin is thermoplastic epoxy resin.

[0058] The expanded end of the FRP tendon anchoring of the present invention is processed by a mold, wherein the mold includes a concave mold with a cavity and a convex film with a mandrel, and the processing method specifically includes:

[0059] Wrap the bidirectional fiber cloth impregnated with thermoplastic resin on the mandrel as the inner layer, and the winding thickness of the inner layer should be 2-5mm higher than the rib height, so as to ensure that the winding layer completely wraps the rib;

[0060] Continue to wind the continuous fiber impregnated with thermosetting r...

Embodiment 2

[0064] An enlarged end for FRP tendon anchoring, including an inner layer and an outer layer, the outer layer includes: fiber: 70 parts by mass; thermosetting resin: 30 parts by mass; the inner layer includes: two-way fiber cloth: 45 parts by mass; Thermoplastic resin: 55 parts by mass; fiber is continuous fiber; thermosetting resin is epoxy resin; thermoplastic resin is thermoplastic epoxy resin.

[0065] The expanded end of the FRP tendon anchoring of the present invention is processed by a mold, wherein the mold includes a concave mold with a cavity and a convex film with a mandrel, and the processing method specifically includes:

[0066] Wind the bidirectional fiber cloth impregnated with thermoplastic resin on the mandrel as the inner layer, and the winding thickness of the inner layer should be 2 to 5 mm higher than the rib height;

[0067] Continue to wind the continuous fiber impregnated with thermosetting resin on the wound two-way fiber cloth as the outer layer. be...

Embodiment 3

[0071] An enlarged end for FRP tendon anchoring, including an inner layer and an outer layer, the outer layer includes: fiber: 65 parts by mass; thermosetting resin: 35 parts by mass; the inner layer includes: two-way fiber cloth: 50 parts by mass; Thermoplastic resin: 50 parts by mass; fiber is continuous fiber; thermosetting resin is epoxy resin; thermoplastic resin is thermoplastic epoxy resin.

[0072] The expanded end of the FRP tendon anchoring of the present invention is processed by a mold, wherein the mold includes a concave mold with a cavity and a convex film with a mandrel, and the processing method specifically includes:

[0073] Wind the bidirectional fiber cloth impregnated with thermoplastic resin on the mandrel as the inner layer, and the winding thickness of the inner layer should be 2 to 5 mm higher than the rib height;

[0074] Continue to wind the continuous fiber impregnated with thermosetting resin on the wound two-way fiber cloth as the outer layer. be...

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Abstract

The invention discloses an expanded end head for anchoring an FRP rib, a processing method and an anchoring method. The expanded end head for anchoring the FRP rib comprises an inner layer and an outer layer, wherein the outer layer is provided with a shrinking section of which one end surface varies in one direction; the outer layer comprises the following components: 60-70 parts by mass of fibers and 30-40 parts by mass of thermosetting resin; the inner layer comprises the following components: 40-50 parts by mass of bidirectional fiber fabric and 50-60 parts by mass of thermoplastic resin;and the inner layer is wrapped by the outer layer and integrally cured with the outer layer. The end head is used for anchoring the end part of the FRP rib in the concrete structure, such as a beam, apole, a slab and a wall, and can greatly shorten anchoring length required by the structure and realize the effective anchoring of the FRP rib and the concrete. The method has the characteristics ofconvenient construction and high reliability.

Description

technical field [0001] The invention relates to an anchoring technology for fiber-reinforced composite tendons in concrete structures in the fields of civil engineering and transportation. Background technique [0002] Fiber Reinforced Polymer (FRP) has the advantages of high strength, light weight, corrosion resistance and fatigue resistance. FRP reinforcement is a composite material formed by fiber yarn impregnated with resin in a certain proportion and formed by pultrusion process. It is an ideal substitute for steel bars in civil engineering applications. It has been used in bridges, hydraulic structures, seaports, and reinforcement projects. . [0003] Although FRP bars have broad prospects in the field of civil engineering, there are still some problems when they are used as a substitute for steel bars in concrete structures. Since FRP bars cannot be bent and welded like steel bars, and because the Poisson ratio of FRP bars is large, their transverse shrinkage is oft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C5/07B29C70/34B29C70/54
CPCB29C70/34B29C70/54E04C5/07
Inventor 吴智深汪昕史健喆朱中国
Owner SOUTHEAST UNIV
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