CN107447757A - The Extruded anchoring tool and anchoring process of a kind of FRP tendons - Google Patents
The Extruded anchoring tool and anchoring process of a kind of FRP tendons Download PDFInfo
- Publication number
- CN107447757A CN107447757A CN201710577565.XA CN201710577565A CN107447757A CN 107447757 A CN107447757 A CN 107447757A CN 201710577565 A CN201710577565 A CN 201710577565A CN 107447757 A CN107447757 A CN 107447757A
- Authority
- CN
- China
- Prior art keywords
- sleeve pipe
- frp tendons
- anchor cylinder
- hole
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 210000002435 tendon Anatomy 0.000 title claims abstract description 73
- 238000004873 anchoring Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims abstract description 30
- 239000004519 grease Substances 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 2
- 230000004323 axial length Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 claims description 2
- -1 kirsite Inorganic materials 0.000 claims description 2
- 229910000648 terne Inorganic materials 0.000 claims description 2
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 210000003205 muscle Anatomy 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 208000010392 Bone Fractures Diseases 0.000 description 2
- 206010017076 Fracture Diseases 0.000 description 2
- 239000003733 fiber-reinforced composite Substances 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
- E04C5/127—The tensile members being made of fiber reinforced plastics
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention is the Extruded anchoring tool and anchoring process of a kind of FRP tendons, Extruded anchoring tool includes anchor cylinder, sleeve pipe, FRP tendons, extrusion die and extruder, anchor cylinder one end is provided with chamfering, middle part is provided with the conical through-hole extended along its center line, the embedded sleeve pipe being adapted with conical through-hole of conical through-hole, bushing outer surface is wedge surface, and middle part is the cylindrical center through hole being adapted with FRP tendons, and conical through-hole, central through hole, the center line of FRP tendons overlap.Anchoring process includes：Sleeve pipe is penetrated into anchor cylinder, the wedge surface of sleeve pipe is bonded with the conical through-hole of anchor cylinder；The tail end of FRP tendons is run through to the centre bore of sleeve pipe, and stretches out anchor cylinder, box face；Assembly is put into extruder, grease is equably smeared in anchor tube outer surface；The assembly of anchor cylinder, sleeve pipe and FRP tendons is evenly headed into extrusion die by operation extruder.It is of the invention safe and reliable, easy to assembly, internal reasonable stress, it is a kind of new anchorage that can play FRP tendons advantage.
Description
Technical field
The present invention relates to a kind of Extruded anchoring tool of FRP tendons and its anchoring process.
Background technology
Fibre reinforced composites (Fiber Reinforced Plastic, abbreviation FRP) muscle is by carbon fiber, glass fibers
Tie up contour performance continuous fiber and be impregnated in the overall muscle material formed in the good resin of decay resistance.FRP tendons have high intensity,
The excellent performance such as low-gravity, corrosion-resistant, endurance, is widely used in field of civil engineering.But FRP tendons are as each to different
Property material, its axial strength is higher, and transverse strength is low, and anchoring is more difficult, therefore anchorage technology is to restrict FRP tendons engineering
The bottleneck problem of application.
Conventional FRP tendons anchorage is broadly divided into bonded and two kinds of clip type.The advantages of bond type anchorage be to FRP tendons not
Cause to damage, by irrigating cementing medium in anchor cylinder, media cures to be bonded can be prepared by test specimen.But some cementing medium streams
Dynamic property is poor, and perfusion is relatively difficult, is easily caused perfusion leakiness, influences anchoring property, and such anchorage needs longer bonding
Length ensures that FRP tendons do not slide with cementing medium.Strand tapered anchorage is mainly used in anchoring prestress steel strand wires, relies on cone
Clevis piece and extruding force clamping muscle material caused by anchor cup, have the advantages that construction is convenient, anchoring efficiency is high.But for it is horizontal see it is each to
The FRP tendons of the same sex, FRP tendons are destroyed in anchoring procedure because early fracture occurs for the stress concentration of part, it is impossible to give full play to FRP
The high intensity of muscle.In addition, also using extruding anchor construction technology to steel strand wires in engineering, extrusion element, steel are twisted by extruder
Line is squeezed into extrusion die taper hole, and because extrusion element diameter is more than taper hole diameter, extrusion element is closely compressed in steel strand wires
On, but extruding anchor technology is also only applied to anchor steel strand wires.
At present, domestic and international civil engineering field is directed to anchoring system of the research and development suitable for FRP tendons, how to break through existing
The deficiency of anchorage technology, a kind of novel anchorage that can more preferably play FRP tendons advantage is proposed, can greatly promote FRP tendons in soil
The application in wood engineering field.
The content of the invention
The technical problems to be solved by the invention are to provide one kind securely and reliably, easy to assembly, internal reasonable stress, more can
Suitable for the Extruded anchoring tool of fiber-reinforced composite material rib.
In order to solve the above problems, the technical scheme is that：
A kind of Extruded anchoring tool of FRP tendons, including anchor cylinder 1, sleeve pipe 2 and fibre reinforced composites FRP tendons 3, it is described
Anchor cylinder 1 is the cylinder that one end is provided with chamfering, and for anchoring FRP tendons, the middle part of cylinder, which is provided with along the taper of its center line extension, to be led to
Hole.Described chamfer angle is identical with the taper hole inclination angle of extrusion die 4.
The sleeve pipe 2 being adapted with conical through-hole is embedded with described conical through-hole；The described outer surface of sleeve pipe 2 is wedge
Face, the internal diameter of sleeve pipe 2 are engaged with FRP tendons 3, that is, the FRP tendons 3 anchored can extend through sleeve pipe 2, and sleeve pipe 2 is enclosed in FRP tendons 3
Prevent from damaging FRP tendons 3 in extrusion process；Conical through-hole, sleeve pipe 2, the center line of the three of FRP tendons 3 of described cylinder overlap.
The diameter of FRP tendons 3 is less than the internal diameter of sleeve pipe 2.
Described anchor cylinder 1 is equal with the axial length of sleeve pipe 2, and the both greater than design anchoring length of the anchor force of FRP tendons 3 requirement
Degree.
The inclination angle theta of the described middle part conical through-hole of anchor cylinder 1 is equal with the inclination angle of 2 wedge-shaped outer surface of sleeve pipe, the size of inclination angle theta
It is related to the intensity and size of FRP tendons.
Described sleeve pipe 2 using the good metal of ductility, including aluminium alloy, copper alloy, kirsite, austenitic stainless steel,
Terne metal.
The anchoring process of the Extruded anchoring tool of above-mentioned FRP tendons, specific steps include：
Step 1, sleeve pipe 2 is penetrated in anchor cylinder 1, the wedge surface of sleeve pipe 2 is bonded with the conical through-hole of anchor cylinder 1.
Step 2, the tail end of FRP tendons 3 is run through into sleeve pipe 2, FRP tendons 3 stretch out the end face certain length of anchor cylinder 1 and sleeve pipe 2；Institute
It is the crimp elongation more than anchor cylinder 1, sleeve pipe 2 to state the certain length in step 2.
Step 3, the assembly of anchor cylinder 1, sleeve pipe 2 and FRP tendons 3 is put into extruder 5, anchor cylinder 1 is provided with the end of chamfering
Face is bonded with the taper hole of extrusion die 4, and anchor cylinder 1, sleeve pipe 2, the center line of FRP tendons 3 overlap with the center line of the taper hole of extrusion die 4,
Grease is equably smeared in the outer surface of anchor cylinder 1.
Step 4, the assembly of anchor cylinder 1, sleeve pipe 2 and FRP tendons 3 is evenly headed into extrusion die 4 by operation extruder 5, is assembled
Part crimp in extrusion die 4.
Step 5, quality inspection is carried out to the assembly that extruding is completed, checks whether anchorage flexural deformation occurs.
Beneficial effects of the present invention are：Extruded anchoring tool is anchored using extrusion process to FRP tendons, anchor in extrusion process
The extrusion deformation degree of tool is controllable, therefore compression can be uniformly distributed in anchorage zone as caused by crimp, stress point
Cloth is more reasonable；Meanwhile chamfering is provided with one end of sleeve, the extrusion deformation degree of the end is small, efficiently avoid due to end
Early fracture caused by portion's stress concentration destroys, so as to give full play to the high intensity of FRP tendons.
Sleeve pipe in Extruded anchoring tool employs the good metal material of ductility, and transition zone is served in extrusion process
Effect, avoids extruding force and FRP tendons is caused to damage, and extruding is completed rear sleeve and FRP tendons and closely agreed with, improve sleeve pipe and
The interface shear strength of FRP tendons, it ensure that effective clamping of the anchorage to FRP tendons.
Extruded anchoring tool has the advantages that safe and reliable, small volume, carries fast, easy construction, especially suitable for rock soil anchor
Gu, the engineering field such as bridge cable and structural strengthening.
Below in conjunction with the accompanying drawings the Extruded anchoring tool to a kind of fiber-reinforced composite material rib of the present invention and anchoring process make into
One step explanation.
Brief description of the drawings
Fig. 1 is the assembling schematic diagram of anchor cylinder, sleeve pipe and FRP tendons before extruding.
Fig. 2 is the Extruded anchoring tool extrusion process schematic diagram of FRP tendons.
Fig. 3 is the assembly schematic diagram after the completion of extruding.
In figure：1 anchor cylinder；2 sleeve pipes；3 FRP tendons；4 extrusion dies；5 extruders.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
As shown in figure 1, the Extruded anchoring tool assembly in the embodiment of the present invention includes the anchor cylinder 1 of steel, the sleeve pipe 2 of aluminum
And CFRP tendons 3.The inclination angle of the interior tapered through hole of anchor cylinder 1 is equal with the inclination angle of sleeve wedge-shape outer surface, and the angle of inclination angle theta can be with
For 1 ° to 3 °, due to a diameter of 5mm of the CFRP tendons 3 in embodiment, it is 2 ° to take inclination angle theta.One end of anchor cylinder is provided with chamfering, chamfering
Angle it is identical with the inclination angle of extrusion die taper hole.
Fig. 2 is the Extruded anchoring tool anchoring process schematic diagram of FRP tendons, and embodiment includes：Anchor cylinder 1, sleeve pipe 2, CFRP tendons
3rd, extrusion die 4, extruder 5.
Using the Extruded anchoring tool anchoring process of the FRP tendons of above-described embodiment, including：
Step 1, sleeve pipe 2 penetrates anchor cylinder 1, the wedge surface of sleeve pipe 2 is bonded with the conical through-hole of anchor cylinder 1；
Step 2, the tail end of CFRP tendons 3 is run through into sleeve pipe 2, and stretches out anchor cylinder 1, the end face 10mm of sleeve pipe 2；
Step 3, the assembly of anchor cylinder 1, sleeve pipe 2 and CFRP tendons 3 is put into extruder 5, anchor cylinder 1 is provided with one end of chamfering
It is bonded with extrusion die 4, anchor cylinder 1, sleeve pipe 2, the center line of CFRP tendons 3 overlap with the center line of extrusion die 4, in the outer surface of anchor cylinder 1
Equably smear grease；
Step 4, the assembly of anchor cylinder 1, sleeve pipe 2 and CFRP tendons 3 is evenly headed into extrusion die 4 by operation extruder 5, is assembled
Part crimp in extrusion die 4, as shown in Figure 2；
Step 5, quality inspection is carried out to the assembly (Fig. 3) that extruding is completed, it is main to check whether anchorage bending occurs and become
Shape.
Although above-mentioned the embodiment of the present invention is described in conjunction with the embodiments, not the present invention is protected
The limitation of scope, one of ordinary skill in the art should be understood that on the basis of technical solution of the present invention those skilled in the art are not
Need to pay various modifications or deformation that performing creative labour can make still within protection scope of the present invention.
Claims (4)
1. a kind of Extruded anchoring tool of FRP tendons, it is characterised in that including anchor cylinder (1), sleeve pipe (2) and fibre reinforced composites
FRP tendons (3), described anchor cylinder (1) are the cylinder that one end is provided with chamfering, for anchoring FRP tendons (3), are provided with the middle part of cylinder along it
The conical through-hole of center line extension；Described anchor cylinder (1) chamfer angle is identical with extrusion die (4) taper hole inclination angle；
In the middle part of described cylinder the sleeve pipe (2) being adapted with conical through-hole is embedded with conical through-hole；Described sleeve pipe (2) appearance
Face is wedge surface, and internal diameter is engaged with FRP tendons (3), that is, the FRP tendons (3) anchored can extend through sleeve pipe (2)；Described cylinder
Conical through-hole, sleeve pipe (2), FRP tendons (3) three center line overlap；FRP tendons (3) diameter is less than sleeve pipe (2) internal diameter；
Described anchor cylinder (1) and the axial length of sleeve pipe (2) are equal, and the both greater than design anchoring of FRP tendons (3) anchor force requirement
Length.
2. the Extruded anchoring tool of a kind of FRP tendons according to claim 1, it is characterised in that bored in the middle part of described anchor cylinder (1)
The inclination angle theta of shape through hole is equal with the inclination angle of sleeve pipe (2) wedge-shaped outer surface, the size of inclination angle theta and the intensity of FRP tendons and size phase
Close.
3. the Extruded anchoring tool of a kind of FRP tendons according to claim 1 or 2, it is characterised in that described sleeve pipe (2) is adopted
With the good metal of ductility, including aluminium alloy, copper alloy, kirsite, austenitic stainless steel, terne metal.
4. the anchoring process of the Extruded anchoring tool of any described FRP tendons of claims 1 to 3, it is characterised in that following steps：
Step 1, sleeve pipe (2) is penetrated in anchor cylinder (1), the wedge surface of sleeve pipe (2) is bonded with the conical through-hole of anchor cylinder (1)；
Step 2, the tail end of FRP tendons (3) is run through into sleeve pipe (2), FRP tendons (3) stretch out anchor cylinder (1) and the end face of sleeve pipe (2) is certain
Length, the described certain length are the crimp elongation more than anchor cylinder (1), sleeve pipe (2)；
Step 3, the assembly of anchor cylinder (1), sleeve pipe (2) and FRP tendons (3) is put into extruder (5), makes anchor cylinder (1) be provided with
The end face at angle is bonded with the taper hole of extrusion die (4), anchor cylinder (1), sleeve pipe (2), FRP tendons (3) center line and extrusion die (4) cone
The center line in hole is overlapped, and grease is equably smeared in anchor cylinder (1) outer surface；
Step 4, operate extruder (5) and the assembly of anchor cylinder (1), sleeve pipe (2) and FRP tendons (3) is evenly headed into extrusion die
(4), assembly crimp in extrusion die (4)；
Step 5, quality inspection is carried out to the assembly that extruding is completed, checks whether anchorage flexural deformation occurs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710577565.XA CN107447757B (en) | 2017-07-17 | 2017-07-17 | A kind of Extruded anchoring tool and anchoring process of FRP tendons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710577565.XA CN107447757B (en) | 2017-07-17 | 2017-07-17 | A kind of Extruded anchoring tool and anchoring process of FRP tendons |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107447757A true CN107447757A (en) | 2017-12-08 |
| CN107447757B CN107447757B (en) | 2019-04-16 |
Family
ID=60488685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710577565.XA Expired - Fee Related CN107447757B (en) | 2017-07-17 | 2017-07-17 | A kind of Extruded anchoring tool and anchoring process of FRP tendons |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107447757B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942684A (en) * | 2021-02-04 | 2021-06-11 | 北京工业大学 | Strip-type component tensioning and anchoring integrated device with multiple anchoring capabilities |
| CN112942685A (en) * | 2021-02-07 | 2021-06-11 | 哈尔滨工业大学 | Novel anchoring system and anchoring method for fiber reinforced resin composite material rod |
| CN114427202A (en) * | 2021-12-31 | 2022-05-03 | 山西省交通科技研发有限公司 | Carbon fiber composite material rib anchoring method |
| CN115012300A (en) * | 2022-06-18 | 2022-09-06 | 哈尔滨工业大学 | Reusable extrusion-friction type anchoring system for FRP (fiber reinforced Plastic) ribs and anchoring method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09207117A (en) * | 1996-01-31 | 1997-08-12 | Nippon Steel Corp | Metal fitting and method for fixing terminal of frp reinforcing material |
| CN202139762U (en) * | 2011-04-28 | 2012-02-08 | 江苏大学 | Bonding type anchorage device used for FRP (Fiber Reinforce Plastic) rib |
| CN102747812A (en) * | 2012-07-06 | 2012-10-24 | 宁波大学 | Fiber reinforced composite rib/ cable anchorage |
| CN202519884U (en) * | 2011-09-21 | 2012-11-07 | 江苏大学 | Composite anchor for FRP (fiber reinforce plastic) rib |
-
2017
- 2017-07-17 CN CN201710577565.XA patent/CN107447757B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09207117A (en) * | 1996-01-31 | 1997-08-12 | Nippon Steel Corp | Metal fitting and method for fixing terminal of frp reinforcing material |
| CN202139762U (en) * | 2011-04-28 | 2012-02-08 | 江苏大学 | Bonding type anchorage device used for FRP (Fiber Reinforce Plastic) rib |
| CN202519884U (en) * | 2011-09-21 | 2012-11-07 | 江苏大学 | Composite anchor for FRP (fiber reinforce plastic) rib |
| CN102747812A (en) * | 2012-07-06 | 2012-10-24 | 宁波大学 | Fiber reinforced composite rib/ cable anchorage |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942684A (en) * | 2021-02-04 | 2021-06-11 | 北京工业大学 | Strip-type component tensioning and anchoring integrated device with multiple anchoring capabilities |
| CN112942685A (en) * | 2021-02-07 | 2021-06-11 | 哈尔滨工业大学 | Novel anchoring system and anchoring method for fiber reinforced resin composite material rod |
| CN114427202A (en) * | 2021-12-31 | 2022-05-03 | 山西省交通科技研发有限公司 | Carbon fiber composite material rib anchoring method |
| CN115012300A (en) * | 2022-06-18 | 2022-09-06 | 哈尔滨工业大学 | Reusable extrusion-friction type anchoring system for FRP (fiber reinforced Plastic) ribs and anchoring method thereof |
| CN115012300B (en) * | 2022-06-18 | 2024-08-06 | 哈尔滨工业大学 | Reusable extrusion-friction type anchoring system for FRP (fiber reinforced Plastic) ribs and anchoring method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107447757B (en) | 2019-04-16 |
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Granted publication date: 20190416 |