Articulated anchor and prestress tensioning method of high strength fibre composite sheet

A hinged, tensioning technology, applied in the field of prestressed tensioning of high-strength fiber composite materials, can solve the problems of reducing the reinforcement effect of concrete beams, affecting the strength of fiber cloth, and the loss of fiber cloth pre-tensioning force, so as to facilitate standardized operations, Effect of increasing tensile stress and reducing project cost

Active Publication Date: 2010-10-06
卓清
View PDF8 Cites 56 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. When using this device to prestress and stretch the carbon fiber plate, the positioning accuracy of the anchor beam is very high. It is difficult to ensure that the fixture anchors at both ends of the carbon fiber plate are accurately centered during construction, which is due to the uneven tension of the carbon fiber plate during tension. La planted a hidden danger
[0005] 2. The tensioning device uses two hydraulic jacks to push synchronously. When tensioning the carbon fiber board, it is difficult to keep the two jacks in precise synchronization, which directly causes uneven tensioning of the carbon fiber board.
[0006] 3. After the prestressed tensioning of the carbon fiber plate is completed, there are many parts permanently retained on the reinforced structure. These parts can only be used once, which increases the maintenance cost in the later period and correspondingly increases the cost of prestressed reinforcement
[0008] 1. This method is to transversely stretch the fiber cloth not impregnated with resin, but the actual tensile strength of the fiber cloth not impregnated with resin is very low. The longer the fiber cloth is, the lower the actual tensile strength is. The obtained pretension is very limited, thereby reducing the reinforcement effect on the concrete beam
[0009] 2. When using this method for transverse tensioning, if the relative deformation between the support frames at both ends is large, it will cause a large loss of pre-tension force in the fiber cloth, thus affecting the reinforcement effect of the concrete beam
[0010] 3. The movement of the lateral load-bearing beam in this method is controlled by the tension nuts on both sides, and it is difficult to keep up with it synchronously. The uniformity of the fiber cloth tension is very poor, which affects the strength of the fiber cloth.

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
  • Articulated anchor and prestress tensioning method of high strength fibre composite sheet
  • Articulated anchor and prestress tensioning method of high strength fibre composite sheet
  • Articulated anchor and prestress tensioning method of high strength fibre composite sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, a hinged anchor mainly includes an anchor head and a pressing and locking device 1c, and the feature is that the anchor head is composed of a convex anchor 1 and a concave block 2. The protruding anchor 1 is composed of upper and lower splints 1a, 1b, and the front ends of the upper and lower splints 1a, 1b of the protruding anchor 1 are arcuate surfaces convex outward. The concave block 2 of the hinged anchor is composed of upper and lower halves 2a, 2b. The middle part of one side of the concave block 2 is an inward concave arc surface, and the convex arc surface of the convex anchor 1 is in contact with the concave arc surface. The concave arc surfaces of the block 2 are matched to form a surface contact and a hinged connection that is freely rotatable with each other. In the middle part of the inner concave arc surface of the upper and lower half blocks 2a, 2b of the concave block 2, an opening groove is respectively set, and when the upp...

Embodiment 2

[0044] Such as figure 2 , 3 As shown, the specific method steps of a prestressed stretching method of a high-strength fiber composite material sheet are as follows:

[0045] (1) Clamping and anchoring of FRP sheets

[0046] First, the two anchor blocks 4 are fixedly connected to the surface of the reinforced steel beam 13 by means of welding respectively.

[0047] Install the hinged anchor and clamp and anchor the FRP sheet 3 again. For the fixed end, the hinge anchor is installed on the inner side of the anchor block 4 (that is, the anchor block 4 and the concave block 2 of the hinge anchor are separated by the convex anchor 1 of the hinge anchor), and the two connecting screws 5 are respectively After passing through the connecting screw holes reserved at both ends of the anchor block 4 and the concave block 2 of the hinged anchor, the anchor block 4 and the concave block 2 of the hinged anchor are fixedly connected with the front and rear anchor nuts 6 and 7 respectivel...

Embodiment 3

[0053] Such as Figure 4 , 5 Shown, a kind of prestressed stretching method of high-strength fiber composite material sheet, with embodiment 2, wherein:

[0054] In step (1), the two anchoring blocks 4 are fixedly connected to the surface of the reinforced or reinforced concrete beam 14 respectively by means of bolt connection, and the bolt 15 is anchored into the concrete beam 14 in advance. Install the hinged anchor and clamp and anchor the FRP sheet 3 again. For the fixed end, the hinge anchor is installed on the outside of the anchor block 4 (that is, the anchor block and the concave block of the hinge anchor are close together), and the two connecting screws 5 pass through the anchor block 4 and the concave of the hinge anchor respectively. After the connecting screw holes reserved at both ends of the shape block 2, use the front and rear anchor nuts 6 and 7 to fix and connect the anchor block 4 and the concave block 2 of the hinged anchor respectively (that is, back-to...

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

No PUM Login to view more

Abstract

An articulated anchor and a prestress tensioning method of high strength fibre composite sheet relate to an anchor holder used to perform prestress tensioning to the high strength fibre composite material of the enhancement or reinforcement engineering structure and a method thereof. The articulated anchor of the invention comprises an anchor head and a compression and locking device, and the articulated anchor is characterized in that the anchor head contains a raised head anchor and a concave block. The method of the invention is that the articulated anchor is used to clamp and anchor the two ends of FRP sheet, a jack is used to apply a tension on the concave block and the concave block pushes the raised head anchor to perform prestress tensioning to FRP sheet. The articulated anchor of the invention has simple structure, convenient installation and low cost; and the method of the invention is simple, intuitive and practical, and can ensure the tensioning uniformity of FRP sheet, made full use of the intensity of FRP sheet and effectively increase the bearing capacity of the engineering structure. The articulated anchor of the invention can be widely used to enhance or reinforce the large engineering structures such as bridges or buildings and especially to perform external prestressing reinforcement to longspan concrete beams, longspan concrete slabs and the like.

Description

1. Technical field [0001] The invention belongs to the technical field of prestressed tensioning of high-strength fiber composite materials, and in particular relates to an anchor clamp and method for reinforcing or reinforcing engineering structures of high-strength fiber composite material prestress. 2. Background technology [0002] High-strength fiber composite materials (English name Fiber Reinforced Polymer, referred to as FRP), such as carbon fiber reinforced plastics, polymer fiber reinforced plastics, glass fiber reinforced plastics, etc., have the characteristics of light weight, large bearing capacity, fatigue resistance, and corrosion resistance. , Widely used in aerospace, aircraft manufacturing, sports and entertainment products, ships, automobiles, construction and other fields. In particular, the prestressed high-strength fiber composite sheet (FRP sheet for short) can be widely used to strengthen or reinforce civil engineering structures (such as concrete st...

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
Patent Type & Authority Applications(China)
IPC IPC(8): E04C5/12E04G21/12
Inventor 卓清
Owner 卓清
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