Internal-curved-surface-partitioned bond-type anchorage device for carbon fiber reinforced plastics (CFRP) cable strands

A technology of carbon fiber and inner curved surface, applied in the field of partitioned bonded anchorage on inner curved surface, can solve the problems of complex anchorage structure, lower production efficiency and increased production cost, and achieve convenient construction, excellent static and dynamic performance, The effect of simple structure

Active Publication Date: 2017-09-08
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the reinforced rebar assembly makes the anchorage structure extremely complicated, which not only increases the production cost, but also reduces the production efficiency

Method used

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  • Internal-curved-surface-partitioned bond-type anchorage device for carbon fiber reinforced plastics (CFRP) cable strands
  • Internal-curved-surface-partitioned bond-type anchorage device for carbon fiber reinforced plastics (CFRP) cable strands
  • Internal-curved-surface-partitioned bond-type anchorage device for carbon fiber reinforced plastics (CFRP) cable strands

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as Figure 1-4 As shown, an embodiment of the internally curved partitioned bonding anchor for carbon fiber strands according to the present invention includes an anchor ring 1, a large hole end plug 2 and a small hole end plug 3. The large hole end plug 2 and the small hole end plug 3 are respectively provided at both ends of the anchor ring 1; the inside of the anchor ring 1 is in the shape of a trumpet curved surface; the inside of the anchor ring 1 is provided with a partition groove 4, and the partition groove 4 Each zone is filled with carbon fiber cables, the carbon fiber cables are clustered together to form carbon fiber cable strands; the cavity formed between the horn-shaped curved surface inside the anchor ring 1 and the carbon fiber cables is filled with epoxy resin 6 The central part of the large hole end plug 2 and the small hole end plug 3 are provided with a carbon fiber cable limiting hole 12.

[0036] The anchor ring is a steel ring-shaped cylinder ...

Embodiment 2

[0045] According to another embodiment of the inner curved surface partition type bonding anchor for carbon fiber strands of the present invention, the basic structure, the connection relationship between the components, the working principle and the beneficial effects are the same as those of the first embodiment. The difference is: the longitudinal and axial section line of the inner curved surface of the anchor ring is a circular curve, and the curve section forms a horn shape. The absolute value of the slope of the tangent line of the curve section at a certain point of the large hole is 0.1, and the curve section is at a certain point of the small hole. The absolute value of the slope of the tangent is zero or infinitely close to zero. The ratio of the wall thickness of the large hole end to the wall thickness of the small hole end of the anchor ring is 1:4, and the ratio of the wall thickness of the small hole end of the anchor ring to the longitudinal length of the anchor...

Embodiment 3

[0047] According to another embodiment of the inner curved surface partition type bonding anchor for carbon fiber strands of the present invention, the basic structure, the connection relationship between the components, the working principle and the beneficial effects are the same as those of the first embodiment. The difference is: the longitudinal section line of the inner curved surface of the anchor ring is a power function curve, the curve segment forms a horn shape, the absolute value of the slope of the tangent line of the curve segment at a certain point of the large hole end is 0.08, and the curve segment is a tangent line at a certain point of the small hole end The absolute value of the slope is 0 or infinitely close to 0. The ratio of the wall thickness of the large hole end to the wall thickness of the small hole end of the anchor ring is 1:3.5, and the ratio of the wall thickness of the small hole end of the anchor ring to the longitudinal length of the anchor rin...

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PUM

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Abstract

The invention relates to an internal-curved-surface-partitioned bond-type anchorage device for carbon fiber reinforced plastics (CFRP) cable strands. The anchorage device comprises an anchor ring, a large hole end plug and a small hole end plug, wherein the interior of the anchor ring is of a horn-shaped curved surface shape; partition grooves are arranged inside the anchor ring, each partition of the partition grooves is filled with CFRP cable strands; a cavity between the horn-shaped curved surface inside the anchor ring and the CFRP cable strands is filled with epoxy resin adhesives; the longitudinal axial section line of the curved surface inside the anchor ring is a curved section, the curved section is close to a straight line at the small hole end of the anchor ring, and the curvature of the curved section gradually increases from the small hole end to a large hole end to allow the interior of the anchor to be of the horn-shaped curved surface shape. The anchorage device has the advantages that the horn-shaped curved surface inside the anchor ring can allow the radial extrusion force borne by the cable strands to be in an optimal distribution state in the longitudinal direction; the cable strands are arranged in a partitioned manner, the uneven transverse stress of large-diameter cable strands can be improved, a size effect can be lowered, the anchorage efficiency coefficient can reach 100% when the CFRP cable strands are large in diameter, and the device is excellent in static and dynamic performance.

Description

Technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to an inner curved surface partition type bonding anchor for carbon fiber strands. Background technique [0002] As we all know, carbon fiber polymer reinforcement (CFRP) has outstanding advantages such as light weight, high strength, fatigue resistance, corrosion resistance and low relaxation. It is an ideal replacement material for steel strands and can be widely used in civil engineering. The anchors for anchoring carbon fiber include clip-type anchors, bonded anchors, and composite anchors. Most of the anchors of carbon fiber strands (ie, CFRP strands) are inner-cone-bonded anchors. When the cable strand bears the tensile force, the internal structure of the anchor (bonding medium and the strand in the anchoring area) and the anchor ring slide relatively, and the anchor ring provides the wedge tightening force to balance the cable strand tension. Because the ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C5/12E01D19/16E01D19/14
CPCE01D19/14E01D19/16E04C5/12
Inventor 侯苏伟龙佩恒路泽超焦驰宇王毅娟
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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