CN109356029A - A kind of compound anchorage of CFRP tendons pre-extrusion - Google Patents
A kind of compound anchorage of CFRP tendons pre-extrusion Download PDFInfo
- Publication number
- CN109356029A CN109356029A CN201811426160.7A CN201811426160A CN109356029A CN 109356029 A CN109356029 A CN 109356029A CN 201811426160 A CN201811426160 A CN 201811426160A CN 109356029 A CN109356029 A CN 109356029A
- Authority
- CN
- China
- Prior art keywords
- anchorage
- intermediate plate
- steel sleeve
- extrusion
- capping
- 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 32
- 150000001875 compounds Chemical class 0.000 title claims abstract description 26
- 238000001125 extrusion Methods 0.000 title claims abstract description 24
- 239000004918 carbon fiber reinforced polymer Substances 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 239000000084 colloidal system Substances 0.000 claims abstract description 31
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 24
- 210000003746 feather Anatomy 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 20
- 210000003205 muscle Anatomy 0.000 abstract description 16
- 239000004411 aluminium Substances 0.000 description 5
- 238000004873 anchoring Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000010412 perfusion Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 208000025962 Crush injury Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
-
- 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
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
-
- 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
-
- 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
- E04C5/125—Anchoring devices the tensile members are profiled to ensure the anchorage, e.g. when provided with screw-thread, bulges, corrugations
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The present invention relates to a kind of compound anchorages of CFRP tendons pre-extrusion, belong to building and technical field of bridge engineering, including steel sleeve, intermediate plate, aluminum casing, nut, capping and end are blocked up；Wherein, steel sleeve is the inner conical-tube that the constant internal diameter of outer diameter reduces, and intermediate plate is three pieces arc clip, and aluminum casing is cone-shaped slice casing, the outside screw connection of nut and steel bushing；It is blocked in capping and end and is provided with corresponding several location holes, several location holes that the both ends of several CFRP tendons disposed in parallel are each passed through capping and end blocks have pouring material in steel sleeve filling.Relatively common compound anchorage, anchorage of the present invention are a kind of compound anchorages of pre-extrusion, and intermediate plate increases the adhesion strength of colloid and muscle material and frictional force the pre-extrusion of taper colloid, provides bigger pulling capacity；Opposing clip type anchorage, this compound anchorage of pre-extrusion, because of the presence of colloid, substantially reduce intermediate plate and injure to the extruding of muscle material between intermediate plate and muscle material.
Description
Technical field
The invention belongs to buildings and technical field of bridge engineering, specifically, it is compound to be related to a kind of CFRP tendons pre-extrusion
Type anchorage.
Background technique
Carbon fibre reinforced composite (CFRP) is that a kind of density is small, intensity is high, corrosion-resistant, fatigue proof new material,
It is widely studied and applies in civil engineering at present.But its lateral resistance to compression and shearing strength are low, when being used as drag-line or answer in advance
When power muscle, it is anchored according to traditional strand tapered anchorage, CFRP tendons material will be cut at anchorage mouth and make to anchor
Premature failure；It is anchored according to compound anchorage, easily generation bonding-sliding phenomenon is to reduce anchoring efficiency.
" a kind of compound anchorage of CFRP tendons, application No. is in 2014207387595 " patent of invention, steel sleeve is
One section of straight tube adds one section of inner conical-tube, because colloid and steel sleeve are bonded together, colloid be difficult to push ahead so formed squeeze
Pressure is smaller, to need longer anchorage length to anchor CFRP tendons material.
Summary of the invention
In order to solve the problems, such as background technique, the present invention provides a kind of compound anchorage of CFRP tendons pre-extrusion,
It can guarantee not there is a phenomenon where cutting CFRP tendons material in anchorage mouth in anchorage construction and use process, while ensure enough
Anchoring efficiency, to promote application of the CFRP tendons in civil engineering.
To achieve the above object, the present invention is achieved through the following technical solutions:
A kind of compound anchorage of CFRP tendons pre-extrusion, including steel sleeve 2, nut 6, capping 7, end stifled 8, intermediate plate 3, aluminium set
Pipe 4, colloid 5；The steel sleeve 2 is the inner conical-tube that the constant internal diameter of outer diameter reduces, and is provided on the outer wall of steel sleeve 2
Screw thread, at least two panels of intermediate plate 3, intermediate plate 3 are arc clip structure, and aluminum casing 4 is cone-shaped slice casing, are mounted on three pieces intermediate plate
Threaded connection in 3 spaces surrounded, on nut 6 and 2 outer wall of steel sleeve；It is provided in capping 7 and end stifled 8 corresponding several
Location hole, and 7 large diameter ends that 2 inner conical-tube of steel sleeve is set are covered, the small of 2 inner conical-tube of steel sleeve is arranged in end stifled 8
Bore end, the both ends of several CFRP tendons 1 disposed in parallel are each passed through capping 7 and hold the location hole on stifled 8, in steel sleeve 2
Filled with colloid 5.
Preferably, the diameter of the capping 7 and the location hole on end stifled 8 is greater than the diameter 2mm of CFRP tendons 1.
Preferably, corresponding hole centre line and 2 centerline parallel of steel sleeve in the capping 7 and end stifled 8.
Preferably, 4 interior and exterior of aluminum casing requires feather plucking.
Preferably, 3 two-end thickness of intermediate plate takes 10mm and 3mm, concave tooth screw thread, screw thread is arranged in 3 inner surface of intermediate plate
Spacing is 10mm, depth 0.3mm.
Preferably, screw thread, thread pitch 3mm are arranged within the scope of the 2 left end 100mm of steel bushing.
Beneficial effects of the present invention:
The relatively common compound anchorage of the present invention, this is a kind of compound anchorage of pre-extrusion, and intermediate plate is for taper colloid
Pre-extrusion increases the adhesion strength of colloid and muscle material and frictional force, provides bigger pulling capacity；Opposing clip type anchorage, this
The kind compound anchorage of pre-extrusion is between intermediate plate and muscle material because the presence of colloid, substantially reduces crush injury of the intermediate plate to muscle material
Evil.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of (FH250 anchorage) of the invention；
Fig. 2 is the sectional view along A-A of Fig. 1；
Fig. 3 is ZT380 anchorage schematic diagram；
Fig. 4 is NZ380 anchorage schematic diagram；
Fig. 5 is NZZT380 anchorage schematic diagram；
Fig. 6 is NZL250 anchorage schematic diagram；
Fig. 7 is ZT380 anchorage free end load-slip curve；
Fig. 8 is NZ380 anchorage free end load-slip curve；
Fig. 9 is NZZT380 anchorage free end load-slip curve；
Figure 10 is NZL250 anchorage load-slip curve；
Figure 11 is (FH250mm anchorage) load-slip curve of the invention.
In figure, 1-CFRP muscle, 2- steel sleeve, 3- intermediate plate, 4- aluminum casing, 5- colloid, 6- nut, 7- capping, the end 8- are stifled.
Specific embodiment
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, below in conjunction with attached drawing, to the present invention
Preferred embodiment be described in detail, to facilitate the technical staff to understand.
As shown in Figure 1 and Figure 2, a kind of compound anchorage of CFRP tendons pre-extrusion, including steel sleeve 2, nut 6, capping 7, end
Stifled 8, intermediate plate 3, aluminum casing 4, colloid 5；The inner conical-tube that the steel sleeve 2 reduces for the constant internal diameter of outer diameter, and steel sleeve 2
Outer wall on be provided with screw thread, at least two panels of intermediate plate 3, intermediate plate 3 is arc clip structure, and aluminum casing 4 is cone-shaped slice casing,
It is mounted in the space that three pieces intermediate plate 3 surrounds, the threaded connection on nut 6 and 2 outer wall of steel sleeve；It is set on capping 7 and end stifled 8
Corresponding several location holes are equipped with, and cover 7 large diameter ends that 2 inner conical-tube of steel sleeve is set, end stifled 8 is arranged in steel set
The small-caliber end of 2 inner conical-tubes of cylinder, the both ends of several CFRP tendons 1 disposed in parallel are each passed through the positioning in capping 7 and end stifled 8
Hole, steel sleeve 2 is interior to be filled with colloid 5, and colloid 5 selects epoxy resin or micro-expansion cement, answers first accurate meter before colloid 5 is perfused
Calculate the cutting length of CFRP tendons 1.It should reinforce vibrating in filling process, in favor of the trickling of colloid 5 and closely knit.It is supported after the completion of perfusion
Shield 48 hours, it is ensured that the perfusion molding of colloid 5 carries out pre-tightening anchor set again.
The diameter of the capping 7 and the location hole on end stifled 8 is greater than the diameter 2mm of CFRP tendons 1.
Corresponding hole centre line and 2 centerline parallel of steel sleeve in the capping 7 and end stifled 8.
3 two-end thickness of intermediate plate takes 10mm and 3mm, and concave tooth screw thread is arranged in 3 inner surface of intermediate plate, and flight pitch is
10mm, depth 0.3mm.
Screw thread, thread pitch 3mm are set within the scope of the 2 left end 100mm of steel bushing.
Three pieces arc clip 3 is set in steel sleeve 2, is aluminum casing 4 in intermediate plate 3, packet perfusion colloid 5, steel in aluminum casing 4
2 inner surface of sleeve is smooth, and roughness Ra takes 12.5, screw thread is arranged within the scope of 2 left end 100mm of steel bushing, thread pitch is
3mm.Intermediate plate two-end thickness takes 10mm and 3mm, and concave tooth screw thread, flight pitch 10mm is arranged in intermediate plate inner surface, and depth is
0.3mm, to apply extruding force to aluminium flake 4 and perfusion colloid 5.Aluminum casing interior and exterior requires feather plucking.To guarantee the flat of CFRP tendons 1
Row, so that each 1 uniform force of CFRP tendons, is arranged corresponding location hole on end stifled 4 and capping 5, diameter is than CFRP tendons 1
So that CFRP tendons 1 pass through, while several positioning plates are arranged to guarantee the collimation of free segment muscle material in free segment in the big 2mm of diameter.
In the invention patent, steel sleeve is inner conical-tube, and colloid is perfused by aluminum casing, and colloid is not bonded with sleeve,
And intermediate plate is pressed using jack to form extruding force, to greatly improve adhesion strength, anchorage length is reduced.Also,
Colloid has generated a certain amount of sliding when precompressed intermediate plate, and the slippage during anchorage use is reduced.
Experimental analysis
In order to verify anchoring property of the invention, five pairs of anchorages, respectively straight barrel type, internal cone type, inner cone+straight tube are designed altogether
Formula, inner cone+aluminium set tubular type, pre-extrusion composite anchorage.Straight barrel type anchorage component is muscle material+colloid+steel bushing, as shown in figure 3,
Wherein steel bushing internal diameter is constant along its length.The component of internal cone type anchorage is as straight barrel type anchorage, but steel bushing internal diameter edge
Length direction slowly reduces, and forms conical internal cavity, as shown in Figure 4.Inner cone+straight barrel type anchorage component is the same as internal cone type anchorage, difference
It is that its adhesive section is combined by a part of inner cone section and a part of direct tube section group, as shown in Figure 5.Inner cone+aluminum casing anchorage group
Part is external steel bushing+inside aluminum casing+colloid+muscle material, as shown in fig. 6, the difference of it and internal cone type anchorage is internal cone type
The colloid and steel bushing of anchorage directly bond, and inner cone+aluminium set tubular type anchorage colloid is filled in aluminum casing, then again by aluminium
Casing is placed in steel bushing, guarantees the combination of aluminum casing and steel bushing by applying pretightning force.Five kinds of anchorage code name number rule
It is then anchorage form+bond length (mm)+1 (2)." 1 (2) " indicate a left side (right side) anchorage in a pair of of anchorage.Wherein straight barrel type anchor
Tool indicates that internal cone type anchorage is indicated with NZ, and inner cone+straight barrel type anchorage is indicated with NZZT with ZT, and inner cone+aluminium set tubular type anchorage is used
NZL indicates that the present invention is indicated with FH.CFRP tendons material diameter is 7mm used in five pairs of anchorages.
Test result is as shown in Fig. 7~Figure 11 and table 1:
Each anchorage test result summary sheet of table 1
As can be seen from Table 1, other than FH250 type anchorage failure mode is the fracture of muscle material, the failure mode of other anchorages
It is that muscle material is extracted, and the slippage of loading end is even less than other types anchorage free end when FH250 load destruction
Slippage, and the bond length of FH250 type anchorage only has 250mm, bond length is most short in this several groups of anchorages, it is seen that FH250
Anchorage has obtained best anchoring effect with the smallest bond length.It follows that: the novel pre-extrusion is compound
Anchorage possesses the anchoring property better than other types anchorage.
The relatively common compound anchorage of the present invention, this is a kind of compound anchorage of pre-extrusion, and intermediate plate is for taper colloid
Pre-extrusion increases the adhesion strength of colloid and muscle material and frictional force, provides bigger pulling capacity；Opposing clip type anchorage, this
The kind compound anchorage of pre-extrusion is between intermediate plate and muscle material because the presence of colloid, substantially reduces crush injury of the intermediate plate to muscle material
Evil.
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention rather than limits, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (6)
1. a kind of compound anchorage of CFRP tendons pre-extrusion, including steel sleeve (2), nut (6), capping (7), hold stifled (8), it is special
Sign is: the compound anchorage of the CFRP tendons further includes intermediate plate (3), aluminum casing (4), colloid (5)；The steel sleeve
(2) inner conical-tube reduced for the constant internal diameter of outer diameter, and screw thread is provided on the outer wall of steel sleeve (2), intermediate plate (3) at least two
Piece, intermediate plate (3) are arc clip structure, and aluminum casing (4) is cone-shaped slice casing, are mounted on the space that three pieces intermediate plate (3) surrounds
Interior, on nut (6) and steel sleeve (2) outer wall threaded connection；It is corresponding several fixed to be provided in capping (7) and end stifled (8)
Position hole, and (7) setting is covered in the large diameter end of steel sleeve (2) inner conical-tube, hold stifled (8) to be arranged in steel sleeve (2) inner cone
The small-caliber end of cylinder, the both ends of several CFRP tendons (1) disposed in parallel are each passed through capping (7) and hold the location hole on stifled (8),
Colloid (5) are filled in aluminum casing (4).
2. a kind of compound anchorage of CFRP tendons pre-extrusion according to claim 1, it is characterised in that: the capping (7)
It is greater than the diameter 2mm of CFRP tendons (1) with the diameter of the location hole on end stifled (8).
3. a kind of compound anchorage of CFRP tendons pre-extrusion according to claim 1 or 2, it is characterised in that: the capping
(7) and corresponding hole centre line and steel sleeve (2) centerline parallel on (8) are blocked up in end.
4. a kind of compound anchorage of CFRP tendons pre-extrusion according to claim 1, it is characterised in that: the aluminum casing
(4) interior and exterior requires feather plucking.
5. a kind of compound anchorage of CFRP tendons pre-extrusion according to claim 1, it is characterised in that: the intermediate plate (3)
Two-end thickness takes 10mm and 3mm, and concave tooth screw thread, flight pitch 10mm, depth 0.3mm is arranged in intermediate plate (3) inner surface.
6. a kind of compound anchorage of CFRP tendons pre-extrusion according to claim 1, it is characterised in that: the steel bushing
(2) screw thread, thread pitch 3mm are set within the scope of the 100mm of left end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811426160.7A CN109356029B (en) | 2018-11-27 | 2018-11-27 | CFRP rib pre-extrusion composite anchorage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811426160.7A CN109356029B (en) | 2018-11-27 | 2018-11-27 | CFRP rib pre-extrusion composite anchorage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109356029A true CN109356029A (en) | 2019-02-19 |
| CN109356029B CN109356029B (en) | 2024-05-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811426160.7A Active CN109356029B (en) | 2018-11-27 | 2018-11-27 | CFRP rib pre-extrusion composite anchorage device |
Country Status (1)
| Country | Link |
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| CN (1) | CN109356029B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2686915A1 (en) * | 1992-01-31 | 1993-08-06 | Gtm Batimen Travaux Publ | Device for anchoring, under tension, tie rods made of composite material |
| CN101967867A (en) * | 2010-10-27 | 2011-02-09 | 西南交通大学 | Universal clamping piece type anchor for carbon fiber reinforced plastic (CFRP) bars |
| CN102747811A (en) * | 2012-07-06 | 2012-10-24 | 宁波大学 | Carbon fiber reinforced polymer rope anchor |
| CN204282649U (en) * | 2014-11-28 | 2015-04-22 | 长安大学 | A kind of CFRP muscle binding type ground tackle |
| CN104727487A (en) * | 2015-03-23 | 2015-06-24 | 天津大学 | Composite CFRP (Carbon Fibre Reinforced Polymer) tendon anchoring system |
| CN106522472A (en) * | 2016-12-14 | 2017-03-22 | 长安大学 | Sliding self-locking CFRP rib anchor device and mounting method thereof |
| CN108221666A (en) * | 2017-12-28 | 2018-06-29 | 江苏大学 | A kind of compound anchorage of FRP tendons |
| CN209323369U (en) * | 2018-11-27 | 2019-08-30 | 长安大学 | A kind of compound anchorage of CFRP tendons pre-extrusion |
-
2018
- 2018-11-27 CN CN201811426160.7A patent/CN109356029B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2686915A1 (en) * | 1992-01-31 | 1993-08-06 | Gtm Batimen Travaux Publ | Device for anchoring, under tension, tie rods made of composite material |
| CN101967867A (en) * | 2010-10-27 | 2011-02-09 | 西南交通大学 | Universal clamping piece type anchor for carbon fiber reinforced plastic (CFRP) bars |
| CN102747811A (en) * | 2012-07-06 | 2012-10-24 | 宁波大学 | Carbon fiber reinforced polymer rope anchor |
| CN204282649U (en) * | 2014-11-28 | 2015-04-22 | 长安大学 | A kind of CFRP muscle binding type ground tackle |
| CN104727487A (en) * | 2015-03-23 | 2015-06-24 | 天津大学 | Composite CFRP (Carbon Fibre Reinforced Polymer) tendon anchoring system |
| CN106522472A (en) * | 2016-12-14 | 2017-03-22 | 长安大学 | Sliding self-locking CFRP rib anchor device and mounting method thereof |
| CN108221666A (en) * | 2017-12-28 | 2018-06-29 | 江苏大学 | A kind of compound anchorage of FRP tendons |
| CN209323369U (en) * | 2018-11-27 | 2019-08-30 | 长安大学 | A kind of compound anchorage of CFRP tendons pre-extrusion |
Non-Patent Citations (1)
| Title |
|---|
| 詹界东;杜修力;王作虎;: "CFRP筋夹片-套筒型锚具的研发", 建筑结构学报, no. 1, pages 339 - 343 * |
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| CN109356029B (en) | 2024-05-03 |
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