Large-tonnage FRP stay cable anchoring method

A large-tonnage, anchoring technology, applied to bridge parts, erecting/assembling bridges, bridges, etc., can solve problems such as stress concentration, long anchorage area length, and small anchoring force, so as to relieve stress concentration at the loading end and relieve lateral stress The effect of concentrating and ensuring synchronous work performance

Active Publication Date: 2018-05-08
SOUTHEAST UNIV +1
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the clip-type anchor is used to anchor the FRP cable, the clip in the anchorage area will produce lateral extrusion deformation on the FRP cable, and stress concentration will appear at the loading end of the clip-type anchor, which will easily cause the transverse shear of the FRP cable. Shear failure precedes tensile failure
[0007] The anchoring methods of large tonnag

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Large-tonnage FRP stay cable anchoring method
  • Large-tonnage FRP stay cable anchoring method
  • Large-tonnage FRP stay cable anchoring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] Below in conjunction with the accompanying drawings, the technical solutions of the present invention are further explained in detail. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. The modifications of all equivalent forms all fall within the scope defined by the appended claims of the present application.

[0049] figure 2 Wrap the fiber roving 7 impregnated with resin 8 around the anchoring area of ​​a single small-diameter FRP tendon 6 , wherein the length of the fiber roving 7 is not less than the length of the anchoring area of ​​a single small-diameter FRP tendon 6 . The resin 8 can be epoxy resin, vinyl resin, etc., and the fiber roving 7 can be carbon fiber, basalt fiber, aramid fiber, etc. A single small-diameter FRP tendon 6 is arranged in parallel in a plane according to a certain rule to form an FRP cable 1, and a certain thickness of carbon...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Widthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a large-tonnage FRP stay cable anchoring method. The method comprises steps: forming a taper variable stiffness load transmission medium on a FRP stay cable anchoring region, wherein the variable stiffness load transmission medium being formed by fiber yarns which are winded along a length direction of the FRP stay cable anchoring region in a segmented manner through mouldpressing, heating, and solidifying, using fiber yarns in different kinds in different segments, to form variable stiffness load, the fiber yarns being soaked by resin before being winded; along an axial direction of the variable stiffness load transmission medium, cutting a plurality of kerfs; using a taper anchorage device matched with the taper variable stiffness load transmission medium to anchor. The anchoring method is advantaged by simple manufacturing, easy control, good coordination force property, high anchoring efficiency, continuous variation of load transmission medium stiffness, and more uniform load transmission medium stiffness. Fiber content and transverse stiffness of the variable stiffness load transmission medium gradually increase from a loading end to a free end, to relieve or eliminate notch effect of the loading end of the FRP stay cable, and prevent lateral shearing damages from preceding tensile damages of the large-tonnage FRP stay cable caused by stress concentration.

Description

technical field [0001] The invention relates to a large-tonnage FRP cable anchoring method technology using an integral variable stiffness load transmission medium, and belongs to the technical field of large-tonnage FRP cable anchorage. Background technique [0002] Fiber Reinforced Polymer (FRP) is a new type of composite material formed by a pultrusion process with fiber as a reinforcing material, resin as a matrix material, and auxiliary materials such as sizing agent added. FRP has many excellent properties such as light weight, high strength, corrosion resistance, fatigue resistance and good shock absorption performance. It is an ideal material for replacing steel bars in civil engineering structures. have been applied in other structures. [0003] Fatigue failure of steel cables of long-span bridges, insufficient corrosion resistance, and large sag caused by excessive self-weight have gradually become important factors that endanger the safety and reliability of brid...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E01D21/00E01D19/14E01D19/16
Inventor 汪昕吴智深周竞洋朱中国宋进辉
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap