CN105507169B - Tensioning and anchoring device for reinforcing reinforced concrete bridge through prestress FRP(fiber reinforced plastic) cloth and reinforcing method - Google Patents
Tensioning and anchoring device for reinforcing reinforced concrete bridge through prestress FRP(fiber reinforced plastic) cloth and reinforcing method Download PDFInfo
- Publication number
- CN105507169B CN105507169B CN201610028018.1A CN201610028018A CN105507169B CN 105507169 B CN105507169 B CN 105507169B CN 201610028018 A CN201610028018 A CN 201610028018A CN 105507169 B CN105507169 B CN 105507169B
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- frp cloth
- tensioning
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- frame
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
Abstract
The invention relates to a tensioning and anchoring device and a reinforcing method, in particular to a tensioning and anchoring device for reinforcing a reinforced concrete bridge through prestress FRP(fiber reinforced plastic) cloth and a reinforcing method. The device aims to solve the problems that due to an existing method of reinforcing the bridge by pasting the FRP cloth, the stress level of the FRP cloth is reduced, the advantage of high strength can not be given into full play effectively, and the reinforcing effect of the bridge is poor. The device comprises the FRP cloth, a prestress tensioning pedestal, two tensioning assemblies, two triangular supports, two anchoring assemblies and two steel rollers. The two triangular supports are arranged on the upper surface of the prestress tensioning pedestal side by side. One steel roller is installed at the upper end of each triangular support. One tensioning assembly is arranged at the lower end of each triangular support. The two ends of the FRP cloth are connected with the two anchoring assemblies respectively. Each anchoring assembly is wound around one steel roller and connected with one corresponding tensioning assembly. The device belongs to the field of bridge building.
Description
Technical field
Determine device and reinforcement means the present invention relates to a kind of stretch-draw anchor, and in particular to a kind of pre-stress FRP cloth reinforces steel
The stretch-draw anchor of reinforced concrete bridge determines device and reinforcement means, belongs to construction of road and bridge field.
Background technology
Reinforced Concrete Bridge would generally due to the fact that and cause to use the deficiency of function and ultimate bearing capacity,
These factors include：Firstth, the birth defect in design；Secondth, the increase of working load；3rd, because collision and corrosion are made
Into structural damage caused by bearing capacity reduction.In order to the normal of bridge structure for keeping these functional deteriorations is used, need
This kind of bridge structure is reinforced to improve its performance.
Fiber-reinforced resin matrix compound material FRP has that proportion is small, intensity is high, corrosion-resistant, geometry is easy to what is made
Advantage, as a kind of preferable bridge strengthening material, has obtained extensive research and engineer applied in bridge strengthening in recent years.
It is a kind of most-often used bridge strengthening mode to paste FRP cloth, is a kind of passive enforcement mode due to pasting FRP cloth, automobile etc.
The strain increment that mobile load is produced is limited, and in failure stage, the stress level reduction of FRP cloth, therefore it is strong effectively to play FRP
Degree advantage high, consolidation effect is general.
Therefore, it is the effective means for improving FRP cloth consolidation effect to develop a kind of pre-stress FRP cloth active reinforcement technique, i.e.,
Before stickup, tensioning is carried out to FRP cloth using a set of tensioning equipment, be allowed to be pasted under high-stress state, completion to be pasted
After put, so as to apply prestressing force to reinforcing beam body, and then greatly improve bridge anti-bending bearing capacity consolidation effect.Experimental study is
It is verified, bending strength can not only be improved by the bottom level tensioning FRP cloth in bridge, and also it is strong to improve shearing resistance
Degree.Pre-stress FRP cloth also improves the performance of beam simultaneously, under working load effect, reduces fracture width and beam
Deformation, and delay the generation of girder bending surrender.And realize that the key of this reinforcement technique is a set of can be applied to reality
The FRP cloth stretching and anchoring device of border engineering.
The content of the invention
The present invention is reduced for the existing stickup FRP cloth reinforcement bridge method of solution causes the stress level of FRP cloth, it is impossible to effectively
Its intensity advantage high, the problem for causing bridge strengthening effect poor are played, and then proposes a kind of pre-stress FRP cloth reinforced steel
The stretch-draw anchor of concrete-bridge determines device and reinforcement means.
The present invention is adopted the technical scheme that to solve the above problems：Device of the present invention includes FRP cloth, prestressing force
Pedestal, two tensioning components, two A-frames, two anchoring assemblies and two steel roller bearings, two A-frames are drawn to set side by side
Put on the upper surface of prestressed stretch-draw pedestal, the upper end of each A-frame is respectively mounted a steel roller bearing, each triangle branch
The lower end of frame is respectively provided with a tensioning component, and the two ends of FRP cloth are connected with two anchoring assemblies respectively, each institute
State anchoring assembly and bypass a steel roller bearing respectively and be connected with the corresponding one tensioning component.
The method of the invention is comprised the following steps that：
Step one, the pre- epoxy resin dipping in FRP cloth, the termination of the FRP cloth that will have been presoaked are wrapped on square hollow beam,
Two square hollow beams are linked together composition anchoring assembly by fixing bolt after epoxy resin cure；
Step 2, anchoring assembly bypass the second of the steel roller bearing of A-frame upper end and the tensioning component of A-frame lower end
Threaded anchor rod is connected；
Step 3, two jack are arranged side by side between the lower surface and scaffold of prestressed stretch-draw pedestal；
After step 4, startup tensioning component are by FRP cloth tensioning to desired stress level, in FRP cloth upper surface and reinforcing bar
Beams of concrete lower surface smears epoxide-resin glue；
Step 5, two jack of startup rise prestressed stretch-draw pedestal, FRP cloth is fitted with reinforced beam；
Step 6, with syringe or syringe needle to FRP cloth and reinforced beam joint place Epoxy Resin For Automatic Pressure Gelation Process removing
Bubble in laminating layer；
After step 7, epoxy resin cure, two jack are removed, wipe out unnecessary FRP cloth from steel roller bearing, it is complete
Into reinforcing.
The beneficial effects of the invention are as follows：1st, the present invention can effectively complete the tensioning of FRP cloth, realize pre-stress FRP cloth
Reinforce purpose.2nd, FRP cloth intensity advantage high is effectively played, bridge strengthening effect is improved；3rd, simple and efficient to handle, energy of the invention
Effectively improve bridge strengthening efficiency.
Brief description of the drawings
Fig. 1 is job site application schematic diagram of the present invention, and Fig. 2 is the structural representation of anchoring assembly, and Fig. 3 is prestressing force
The structural representation of platform is drawn, Fig. 4 is the structural representation of tensioning component.
Specific embodiment
Specific embodiment one：Present embodiment, a kind of pre-stress FRP described in present embodiment are illustrated with reference to Fig. 1 to Fig. 4
The stretch-draw anchor of cloth Strengthened RC Bridge determine device including FRP cloth 1,2, two tensioning components of prestressed stretch-draw pedestal,
Two A-frames, 3, two anchoring assemblies and two steel roller bearings 4, two A-frames 3 are disposed side by side on prestressed stretch-draw pedestal
On 2 upper surface, the upper end of each A-frame 3 is respectively mounted a steel roller bearing 4, and the lower end of each A-frame 3 sets respectively
A tensioning component is put, the two ends of FRP cloth 1 are connected with two anchoring assemblies respectively, each described anchoring assembly point
A steel roller bearing 4 is not bypassed to be connected with the corresponding one tensioning component.
Specific embodiment two：Present embodiment is illustrated with reference to Fig. 2, a kind of pre-stress FRP cloth described in present embodiment adds
Gu the stretch-draw anchor of Reinforced Concrete Bridge determines each described anchoring assembly of device by two square hollow beams 5 and two fixations
Bolt 6 is constituted, and two square hollow beams 5 are connected by two fixing bolts 6.The termination of FRP cloth 1 is wrapped in square hollow beam 5
On, and at least to reach two-layer winding.Make after the combination of two square hollow beams 5 is fixed FRP cloth be placed exactly in two it is square hollow
Between beam 5, so contribute to prevent FRP cloth 1 from disengaging, it is ensured that can effectively apply axial prestress load.Other composition and
Annexation is identical with specific embodiment one.
Specific embodiment three：With reference to Fig. 3 and Fig. 4 explanation present embodiments, a kind of pre-stress FRP described in present embodiment
The stretch-draw anchor of cloth Strengthened RC Bridge determines device, it is characterised in that：Each described tensioning component includes the first counter-force
Frame 7, the second reaction frame 8, hydraulic jack 9, pressure sensor 10, steel plate 11, reaction beam 12, multiple and of first threaded anchor rod 13
Multiple second threaded anchor rods 14, it is the first reaction frame 7, hydraulic jack 9, pressure sensor 10, the second reaction frame 8, steel plate 11, anti-
Power beam 12 from top to bottom sets gradually, and the upper end of hydraulic jack 9 is connected with the lower surface of the first reaction frame 7, hydraulic jack 9
Lower end be connected with the second reaction frame 8 by pressure sensor 10, each first threaded anchor rod 13 is sequentially passed through instead from the bottom to top
Power beam 12, steel plate 11 are connected with the first reaction frame 7, and each second threaded anchor rod 14 sequentially passes through reaction beam 12, steel from the bottom to top
Plate 11, the second reaction frame 8, the first reaction frame 7 are connected with the anchoring assembly.
Reaction beam 12 in present embodiment is riveted or is bolted together with steel plate, peg, in the end of reaction beam 12
The upper surface steel plate that respectively one piece of welding meets thickness requirement, for fixing the A-frame 3 of supporting steel roller bearing, by adjustment the
The position of one reaction frame 7 and the second reaction frame 8, to meet the range demands of hydraulic jack 9, is reinforced by hydraulic jack 9
To be applied to the stress distribution of needs, when the stress level of requirement is reached, all of nut is screwed, keep stress level steady
It is fixed constant.Other compositions and annexation are identical with specific embodiment one.
Specific embodiment four：Present embodiment is illustrated with reference to Fig. 1, a kind of pre-stress FRP cloth described in present embodiment adds
Gu the method for Reinforced Concrete Bridge is achieved by the steps of：
Step one, the pre- epoxy resin dipping in FRP cloth 1, the termination of the FRP cloth 1 that will have been presoaked are wrapped in square hollow beam 5
On, two square hollow beams 5 are linked together composition anchoring assembly by fixing bolt 6 after epoxy resin cure；
Step 2, anchoring assembly bypass the steel roller bearing 4 of the upper end of A-frame 3 and the tensioning component of the lower end of A-frame 3
Second threaded anchor rod 14 is connected；
Step 3, between the lower surface and scaffold 15 of prestressed stretch-draw pedestal 2 two jack 16 are arranged side by side；
After step 4, startup tensioning component are by the tensioning of FRP cloth 1 to desired stress level, in the upper surface of FRP cloth 1 and steel
The lower surface of Concrete Beam Reinforced 17 smears epoxide-resin glue；
Step 5, two jack 16 of startup rise prestressed stretch-draw pedestal 2, make FRP cloth 1 and reinforced beam 17
Laminating；
Step 6, with syringe or syringe needle to FRP cloth 1 and the joint place Epoxy Resin For Automatic Pressure Gelation Process of reinforced beam 17 removing
The bubble gone in laminating layer；
After step 7, epoxy resin cure, two jack 16 are removed, cut unnecessary FRP cloth 1 from steel roller bearing 4
Remove, complete to reinforce.
Stretching process of the invention is：After tensioning component is completed, after Height Adjustment is suitable, all nuts are screwed,
Keep the first reaction frame above hydraulic jack motionless all the time, reinforced by hydraulic jack so that below pressure sensor
The second reaction frame move down, while driving hollow anchoring beam to move down, reach the purpose of tensioning FRP cloth, record pressure
The reading of sensor, after tonnage is reached, screws the nut below reaction beam at once, constant to keep stress level to stablize.When
Still without the tension tonnage for reaching requirement during hydraulic jack arrival range, now, reaction beam bottom is equally screwed first
Nut, to keep current stress level to stablize constant, jack oil return afterwards, the afterwards spiral shell below the reaction frame of upward turn second
Mother, lifting reaction frame and jack assembly, carry out the reset of hydraulic jack, tightening nut after completion, again by hydraulic pressure
Jack reinforcing carrys out tensioning FRP cloth, as described above, until tension tonnage reaches requirement, screwing reaction beam bottom nut, completes to open
Draw.
Taping process of the invention is：It is by being placed on the two of reaction beam bottom thousand that the jacking of whole prestressing force cloth is pasted
Jin top is completed, and reaction beam is supported on scaffold.After FRP cloth is by tensioning to desired stress level, in cloth and concrete table
Epoxide-resin glue is smeared on face, whole stretching bed seat is by hydraulic jack jack-up, so that FRP cloth is fitted with concrete surface.With
Syringe or needle injection epoxy resin are removing the bubble in laminating layer.After epoxy resin cure, jack is removed, put
Loose threaded anchor rod, prestressing force is transferred on beam.Unnecessary FRP cloth, the unnecessary non-prestressed cloth in this part are cut from roller bearing
Can be pasted onto on beam with epoxy resin.
The above, is only presently preferred embodiments of the present invention, and any formal limitation is not made to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any to be familiar with this professional technology people
Member, without departing from the scope of the present invention, when making a little change or modification using the technology contents of the disclosure above
Be the Equivalent embodiments of equivalent variations, as long as be without departing from technical solution of the present invention content, according to technical spirit of the invention,
Within the spirit and principles in the present invention, any simple modification, equivalent and improvement for being made to above example etc., still
Belong within the protection domain of technical solution of the present invention.
Claims (2)
1. a kind of stretch-draw anchor of pre-stress FRP cloth Strengthened RC Bridge determines device, and it includes FRP cloth (1), prestressing force
Stretching bed seat (2), two tensioning components, two A-frames (3), two anchoring assemblies and two steel roller bearings (4), two triangles
Support (3) is disposed side by side on the upper surface of prestressed stretch-draw pedestal (2), and the upper end of each A-frame (3) is respectively mounted one
Individual steel roller bearing (4), the lower end of each A-frame (3) is respectively provided with a tensioning component, the two ends difference of FRP cloth (1)
It is connected with two anchoring assemblies, each described anchoring assembly bypasses a steel roller bearing (4) with a corresponding institute respectively
The connection of tensioning component is stated, each described anchoring assembly is made up of two square hollow beams (5) and two fixing bolts (6), two
Square hollow beam (5) is connected by two fixing bolts (6), it is characterised in that：Each described tensioning component includes the first counter-force
Frame (7), the second reaction frame (8), hydraulic jack (9), pressure sensor (10), steel plate (11), reaction beam (12), multiple first
Threaded anchor rod (13) and multiple second threaded anchor rods (14), the first reaction frame (7), hydraulic jack (9), pressure sensor
(10), the second reaction frame (8), steel plate (11), reaction beam (12) from top to bottom set gradually, the upper end of hydraulic jack (9) with
The lower surface connection of the first reaction frame (7), the lower end of hydraulic jack (9) is by pressure sensor (10) and the second reaction frame
(8) connect, each first threaded anchor rod (13) sequentially passes through reaction beam (12), steel plate (11) and the first reaction frame from the bottom to top
(7) connect, each second threaded anchor rod (14) sequentially passes through reaction beam (12), steel plate (11), the second reaction frame from the bottom to top
(8), the first reaction frame (7) is connected with the anchoring assembly.
2. the method for fixing device Strengthened RC Bridge described in a kind of utilization claim 1, it is characterised in that：Described one
The method for planting pre-stress FRP cloth Strengthened RC Bridge is achieved by the steps of：
Step one, the pre- epoxy resin dipping in FRP cloth (1), the termination of the FRP cloth that will have been presoaked (1) is wrapped in square hollow beam
(5) on, two square hollow beams (5) are linked together composition anchoring assembly by fixing bolt (6) after epoxy resin cure；
Step 2, anchoring assembly bypass the steel roller bearing (4) of A-frame (3) upper end and the tensioning component of A-frame (3) lower end
The second threaded anchor rod (14) connection；
Step 3, between the lower surface and scaffold (15) of prestressed stretch-draw pedestal (2) two jack (16) are arranged side by side；
After step 4, startup tensioning component are by FRP cloth (1) tensioning to desired stress level, in FRP cloth (1) upper surface and steel
Concrete Beam Reinforced (17) lower surface smears epoxide-resin glue；
Step 5, two jack (16) of startup rise prestressed stretch-draw pedestal (2), make FRP cloth (1) and reinforced beam
(17) fit；
Step 6, with syringe or syringe needle to FRP cloth (1) and reinforced beam (17) joint place Epoxy Resin For Automatic Pressure Gelation Process removing
The bubble gone in laminating layer；
After step 7, epoxy resin cure, two jack (16) are removed, from from steel roller bearing (4) by unnecessary FRP cloth (1)
Wipe out, complete to reinforce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610028018.1A CN105507169B (en) | 2016-01-16 | 2016-01-16 | Tensioning and anchoring device for reinforcing reinforced concrete bridge through prestress FRP(fiber reinforced plastic) cloth and reinforcing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610028018.1A CN105507169B (en) | 2016-01-16 | 2016-01-16 | Tensioning and anchoring device for reinforcing reinforced concrete bridge through prestress FRP(fiber reinforced plastic) cloth and reinforcing method |
Publications (2)
| Publication Number | Publication Date |
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| CN105507169A CN105507169A (en) | 2016-04-20 |
| CN105507169B true CN105507169B (en) | 2017-05-24 |
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| CN201610028018.1A Active CN105507169B (en) | 2016-01-16 | 2016-01-16 | Tensioning and anchoring device for reinforcing reinforced concrete bridge through prestress FRP(fiber reinforced plastic) cloth and reinforcing method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106544962B (en) * | 2016-10-28 | 2018-07-03 | 同济大学 | The prestress reinforced construction method of concrete structure |
| CN106522114B (en) * | 2016-10-28 | 2018-08-28 | 同济大学 | The prestressed reinforcement device of concrete structure is carried out using CFRP cloth materials |
| CN109025353A (en) * | 2018-08-26 | 2018-12-18 | 大连理工大学 | A kind of device and construction method of pre-stress FRP sheet material reinforcement of rc beam |
| CN113927728B (en) * | 2021-11-29 | 2023-01-24 | 郑州大学综合设计研究院有限公司 | Novel prestressed concrete mixed reinforcement pipe pile manufacturing device and method |
| CN114892548A (en) * | 2022-05-24 | 2022-08-12 | 重庆达力索缆科技有限公司 | Downward-pressing type external prestress CFRP material reinforcing system and construction method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3983599B2 (en) * | 2002-05-14 | 2007-09-26 | ドーピー建設工業株式会社 | Method for reinforcing concrete member and tension device for tension material used therefor |
| CN100363585C (en) * | 2004-03-04 | 2008-01-23 | 北京特希达科技有限公司 | Prestressed carbon fiber plate stretching method and device |
| KR100580233B1 (en) * | 2004-09-25 | 2006-05-16 | (주)엠프로 | Fiberboard tensioner |
| CN101736912B (en) * | 2009-12-03 | 2012-05-09 | 吴智深 | Anchorage method based on technique of bonding and reinforcement outside prestressed fiber cloth |
| CN102425311B (en) * | 2011-09-05 | 2015-02-25 | 长沙理工大学 | Concrete structure reinforcing method based on near surface mounted prestressed FRP (Fiber Reinforced Polymer) |
| CN104264998B (en) * | 2014-10-20 | 2016-04-13 | 沈阳建筑大学 | For the machine drawing of FRP fixing quantity self-anchoring type prestressing force |
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Effective date of registration: 20210106 Address after: Building 9, accelerator, 14955 Zhongyuan Avenue, Songbei District, Harbin City, Heilongjiang Province Patentee after: INDUSTRIAL TECHNOLOGY Research Institute OF HEILONGJIANG PROVINCE Address before: 150001 No. 92 West straight street, Nangang District, Heilongjiang, Harbin Patentee before: HARBIN INSTITUTE OF TECHNOLOGY |
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Effective date of registration: 20221213 Address after: 150027 Room 412, Unit 1, No. 14955, Zhongyuan Avenue, Building 9, Innovation and Entrepreneurship Plaza, Science and Technology Innovation City, Harbin Hi tech Industrial Development Zone, Heilongjiang Province Patentee after: Heilongjiang Industrial Technology Research Institute Asset Management Co.,Ltd. Address before: Building 9, accelerator, 14955 Zhongyuan Avenue, Songbei District, Harbin City, Heilongjiang Province Patentee before: INDUSTRIAL TECHNOLOGY Research Institute OF HEILONGJIANG PROVINCE |
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