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A method for connecting fiber-reinforced composite tendons

A composite material and fiber-reinforced technology, which is applied in the connection field of fiber-reinforced composite material ribs, can solve the trouble of winding roving, it is difficult to meet the problems of quickness and simplicity, and achieve the effect of reliable performance, convenient construction and enhanced connection performance

Active Publication Date: 2021-04-06
SOUTHEAST UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the FRP bars connected together are generally long, and the required lap length is often tens of centimeters. If this method is used, it will be very troublesome to wind the roving, and it is difficult to meet the quickness and simplicity required in the construction.

Method used

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  • A method for connecting fiber-reinforced composite tendons
  • A method for connecting fiber-reinforced composite tendons
  • A method for connecting fiber-reinforced composite tendons

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that this embodiment is only used to illustrate the present invention and is not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0028] Firstly, a composite cylindrical connection sleeve 1 ( figure 1 , figure 2 ), in the process of stretching, pay attention to controlling the mass fraction of transverse fibers not less than 15%, and the mass fraction of longitudinal fibers is 30% larger than that of FRP tendons. The role of the thermoplastic resin is to deform the sleeve when heated and extruded.

[0029] After the production is completed, the sleeve 1 is cut into a predetermined size, and the th...

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Abstract

The invention discloses a method for connecting fiber-reinforced composite material (FRP) tendons, which uses a shuttle-shaped outer sleeve to connect two FRP tendons through the dual functions of thread mechanical engagement and gluing, and makes them jointly stressed in concrete . The main features of this invention are as follows: firstly, a cylindrical connection sleeve of composite material prepared by mixing FRP material and thermoplastic epoxy resin is produced, and after the thermosetting resin is poured into the sleeve, two FRP bars are inserted into the sleeve one after another for docking. Finally, the sleeve and FRP bars are heated and pressurized through a mold with a special shape, so that the thermoplastic resin of the sleeve material is softened and pressed into a shuttle shape in the mold. This shape is conducive to reducing stress concentration. After curing The overall performance of the Sleeve‑FRP bars is superior. The invention is used for the connection of FRP bars in concrete structures (beams, columns, etc.), and has the characteristics of convenient construction, small butt joint length and high strength, and can ensure effective butt joint between FRP bars in concrete.

Description

technical field [0001] The invention relates to the technical field of connection of fiber-reinforced composite bars 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. FRP tendons used in concrete structures, once their diameter exceeds 14mm, are difficult to be transported in coils and must be cut. Mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C65/48B29C65/56
CPCB29C65/48B29C65/56
Inventor 吴智深汪昕史健喆朱中国
Owner SOUTHEAST UNIV
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