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Manufacture method for adhesive-filling, anti-corrosion and intelligent steel strand

A technology of intelligent steel strands and production methods, which is applied in the field of steel strands, can solve problems such as central wire stripping, limited application, and measurement data cannot be reset, so as to eliminate relative slip deformation, improve service life, and solve application problems Effect

Inactive Publication Date: 2017-11-24
FAERSHENG ZHUDIAN NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology has the following disadvantages: 1) The outer steel wire and the central wire (fiber-reinforced optical fiber composite tendons) that make up the smart steel strand are separated and independent, and are not bonded together. When the steel strand is stretched, the central wire There is a relative slip between the steel wire and the outer steel wire, and even the center wire will be detached; 2) Due to the relative slip deformation, the measurement data cannot be reset after repeated tension and unloading, that is, as a sensor technology, It cannot be effectively calibrated, which limits its application in engineering practice; 3) The steel strand has no anti-corrosion coating, which still cannot effectively solve the problem of corrosion and rust of the steel strand, which affects the durability of the steel strand application, and is no longer suitable for Development Trend of Durability of Current Engineering Structures

Method used

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  • Manufacture method for adhesive-filling, anti-corrosion and intelligent steel strand
  • Manufacture method for adhesive-filling, anti-corrosion and intelligent steel strand
  • Manufacture method for adhesive-filling, anti-corrosion and intelligent steel strand

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Embodiment 1: A filled and bonded anti-corrosion intelligent steel strand, the anti-corrosion resin material is epoxy resin.

[0048] Such as Figure 1 ~ Figure 3 As shown, a filled and bonded anti-corrosion intelligent steel strand is formed by twisting a central wire 2 and an outer steel wire 3 wound around the central wire 2. The central wire 2 is a strip containing an optical fiber and a fiber grating sensor 21. The optical fiber in the strip-shaped wire can be drawn from the end of the steel strand 1; the bonding material 4 filled in the gap between the central wire 2 and the outer steel wire 3, and the coating layer 5 on the outer circumference of the outer steel wire The material is epoxy resin;

[0049] The manufacturing method of the embodiment of the present invention comprises the following steps:

[0050]1) The central wire 2 is a strip-shaped wire containing an optical fiber and a fiber grating sensor 21; the outer steel wire 3 is wrapped around the prepa...

Embodiment 2

[0057] Embodiment 2: A filling and bonding anti-corrosion intelligent steel strand, the anti-corrosion resin filling material is polyethylene resin or polyurea;

[0058] Such as Figure 1 ~ Figure 3 As shown, a filled and bonded anti-corrosion intelligent steel strand is formed by twisting a central wire 2 and an outer steel wire 3 wound around the central wire 2. The central wire 2 is a strip containing an optical fiber and a fiber grating sensor 21. The optical fiber in the strip-shaped wire can be drawn from the end of the steel strand 1; the bonding material 4 filled in the gap between the central wire 2 and the outer steel wire 3, and the coating layer 5 on the outer circumference of the outer steel wire Materials are polyethylene resin or polyurea.

[0059] The manufacturing method of the embodiment of the present invention comprises the following steps:

[0060] 1) The central wire 2 is a strip-shaped wire containing an optical fiber and a fiber grating sensor 21; the...

Embodiment 3

[0065] Embodiment 3: A filling and bonding anti-corrosion intelligent steel strand, the material of which is filled with anti-corrosion resin is epoxy resin, and the central wire is a wire with grooves processed on the surface;

[0066] Such as Figure 3 ~ Figure 4 As shown, a filled and bonded anti-corrosion intelligent steel strand 1 is formed by twisting a central wire 2 and an outer layer steel wire 3 wound around the central wire 2. The central wire 2 is a wire with grooves 23 processed on its surface. , the optical fiber and the fiber grating sensor 21 are embedded in the groove 23, and are fixed and packaged with the packaging compound 22, the optical fiber in the optical fiber and the fiber grating sensor 21 can be drawn from the end of the steel strand 1; the center wire 2 and the outer steel wire 3 The bonding material 4 filled in the gap between them and the material of the coating layer 5 on the outer periphery of the steel wire in the outer layer are epoxy resin. ...

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Abstract

The invention relates to a manufacture method for an adhesive-filling, anti-corrosion and intelligent steel strand. The method comprises the steps that (1) a smooth-face steel strand of which the center filament is made of a strip-shaped linear material containing a fiber grating sensor is made; (2) pre-processing is conducted, and oil removal, rust removal and cleaning are conducted on the surface of the steel strand; (3) outer layer steel wires and the center filament of the steel strand which are twisted and closed are untwisted, so that the outer-layer steel wires and the center filament are independent and disperse; and (4) filling and coating of a resin material are conducted, and closed twisting is carried out, so that the outer-layer steel wires and the center filament are re-closed and form a steel strand state. The adhesive-filling, anti-corrosion and intelligent steel strand made with the method provided by the invention is characterized in that clearance between the center filament and the outer-layer steel wires is filled by an adhesive resin material, and outer circumference of the outer-layer steel wires is also coated with the resin material. The center filament and the outer-layer steel wires are adhered by the adhesive resin material, so harmonious force-loaded deformation of the center filament and the outer-layer steel wires can be achieved; wire slide or wire stripping is avoided; repeated measurement and calibration of a sensor can be achieved; monitoring accuracy is increased; practical application problems of engineering are solved; the service life of the steel strand is prolonged; and durability of engineering structures is guaranteed.

Description

technical field [0001] The invention relates to the technical field of steel strands, in particular to a method for manufacturing a steel strand with an anti-corrosion coating and provided with fiber grating smart tendons. Background technique [0002] As a high-strength prestressed material, steel strand is widely used in engineering structures such as bridge cables, prestressed concrete components, and rock-soil anchor cables, and is a key stress-bearing component. Steel strands are easily affected by the surrounding environment, corroded and rusted, prestressed loss, or even broken, which will endanger the safety of engineering structures in serious cases. It can grasp whether the stress state of the steel strand is safe, play a role in early warning, and ensure the safety of the engineering structure. [0003] The authorized announcement number is CN 101210983B, and the title is "Fiber Bragg Grating Intelligent Steel Strand and Its Manufacturing Method" invention patent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D07B1/06D07B1/14D07B1/16G01L1/24
CPCD07B1/147D07B1/0693D07B1/162D07B1/165D07B2201/2007D07B2201/2012D07B2201/2077D07B2201/2082D07B2201/2092D07B2205/2003D07B2205/2014D07B2205/206D07B2205/3003D07B2205/3007D07B2401/2025D07B2401/205D07B2401/2055D07B2501/2076G01L1/242D07B2801/16D07B2801/10D07B2801/22
Inventor 金平王继成单继安费汉兵向中富杨晓海王茜袁丹许奇峰姜平游晓祥朱峰李涛
Owner FAERSHENG ZHUDIAN NEW MATERIAL