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Concrete structure FRP end anchor device

A concrete structure and end anchoring technology, applied in the direction of structural elements, building components, building structures, etc., can solve the problems of concrete beam damage and complicated construction, and achieve the effects of simple construction, avoidance of reinforcement failure, and improved ductility.

Inactive Publication Date: 2011-02-16
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the adoption of this technology will satisfy the tension of the 2-layer and 4-layer CFRP fabrics, the use of a large number of anchors will cause some damage to the concrete beams, and the construction is complicated

Method used

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  • Concrete structure FRP end anchor device
  • Concrete structure FRP end anchor device
  • Concrete structure FRP end anchor device

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Embodiment Construction

[0017] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0018] according to figure 1 , figure 2 As shown in the parts diagram, the concrete structure fiber cloth anchoring technology consists of a steel sheet 1, a screw rod 2, a nut 3 and a gasket 4. The steel sheet 1 is rectangular, and the edges and corners of the long sides are polished smoothly, and is used for winding and compressing the fiber cloth below it. Firstly drill a symmetrical hole with an electric drill at a predetermined position for fixing the screw rod 2 . During the drilling process, ensure the verticality of the drilling and the accuracy of the position. After cleaning the hole, inject adhesive into the hole, insert the screw 2 into the hole, and fix it at the corresponding position, and keep the screw 2 vertical during the insertion process. Then after the adhesive that fixes the screw rod 2 is...

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Abstract

The invention relates to a concrete structure FRP end anchor device, belonging to the technical field of civil engineering structural strengthening. The invention is characterized in that: the two ends of a fiber cloth are wound on a steel strap, and then a bolt is used for fixing the steel strap on a concrete beam. The invention solves the technical problems that utilization factor of fiber material is reduced and multiple construction technologies are restricted as a strengthening member in externally bonding FRP strengthening method is peeled and strengthening becomes invalid. Construction is complex and cost is high when special strengthening way is adopted, thus being not applicable to practical project. The invention has the benefits and effects that peeling-off of fiber cloth can be delayed, the fiber cloth can bear force with a beam until the fiber cloth is broken even midspan is in peeling-off failure, so that FRP material can be fully utilized, bearing capacity of beam is effectively improved, and time delay of beam damage is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of civil engineering structure reinforcement, and relates to an FRP end anchorage device of a concrete structure. Background technique [0002] Fiber reinforced composites (FRP) have been widely used for structural reinforcement and reinforcement in civil engineering. This material has the advantages of high tensile strength, light weight, corrosion resistance, small creep and easy construction. Numerous studies have found that bonding FRP to the surface of concrete beams with epoxy resin can effectively improve the flexural capacity and stiffness of concrete members. In the early stage of loading, FRP and concrete beams can work well together, but as the load increases, the FRP sheets peel off and lose the reinforcement effect. The FRP peeling failure mode can be attributed to three types: the peeling damage of the concrete cover, the peeling damage of the FRP cloth end interface and the peeling damage of...

Claims

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Application Information

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IPC IPC(8): E04C5/12
Inventor 吴智敏石昌文董海
Owner DALIAN UNIV OF TECH
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