CN108169020A - The stretch-draw anchor experimental provision and method of a kind of pre-stressed carbon fiber plate reinforcing steel beam - Google Patents

The stretch-draw anchor experimental provision and method of a kind of pre-stressed carbon fiber plate reinforcing steel beam Download PDF

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Publication number
CN108169020A
CN108169020A CN201810060769.0A CN201810060769A CN108169020A CN 108169020 A CN108169020 A CN 108169020A CN 201810060769 A CN201810060769 A CN 201810060769A CN 108169020 A CN108169020 A CN 108169020A
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CN
China
Prior art keywords
plate
stretch
reinforcing steel
steel beam
anchor
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Pending
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CN201810060769.0A
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Chinese (zh)
Inventor
徐善华
张宗星
苏超
李柔
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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Priority to CN201810060769.0A priority Critical patent/CN108169020A/en
Publication of CN108169020A publication Critical patent/CN108169020A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces

Abstract

The invention discloses the stretch-draw anchor experimental provision and method of a kind of pre-stressed carbon fiber plate reinforcing steel beam, including:Anchor fixture and tensioning equipment;It anchors fixture and includes upper clamp plate and lower clamp plate;Limiting exterior deckle board is fixedly installed on the stretch-draw anchor beam of tensioning equipment;The front end-plate of limiting exterior deckle board is provided with CFRP plate through-holes;The medial surface of left plate and right plate for limiting exterior deckle board is both provided with grooved tracks, is slided in grooved tracks and is provided with tension clamp;The end plate of limiting exterior deckle board is provided with installation through-hole, and pre-stressed bolt is slidably fitted in installation through-hole;One end that pre-stressed bolt stretches into limiting exterior deckle board is fixedly connected with tension clamp, and the other end is provided with drawing anchor slab;It draws and is provided with jack between anchor slab and the end plate for limiting exterior deckle board.The stretching and anchoring device and method of the present invention can not destroy the globality of original steel construction, will not reduce the bearing capacity of original steel construction;It is easy to operate, cost can be reduced, improves efficiency.

Description

The stretch-draw anchor experimental provision and method of a kind of pre-stressed carbon fiber plate reinforcing steel beam
Technical field
The invention belongs to prestressed stretch-draw anchor technical field, more particularly to a kind of pre-stressed carbon fiber plate reinforcing steel beam Stretch-draw anchor experimental provision and method.
Background technology
Carbon fiber (Carbon Fiber Reinforced Polymer, abbreviation CFRP) is a kind of novel reinforcement material, It is high, easy for construction, good etc. from heavy and light, corrosion resistance and durability with tensile strength compared with traditional reinforcement material such as steel Advantage.With the continuous maturation of prestressing technique, reinforce active service concrete structure using Prestressed CFRP plate and obtained extensively Using, but reinforcement and repair steel beam structure is still in conceptual phase.Existing prestressed stretch-draw and anchoring process are applied to CFRP Reinforcing steel beam, there are many technical barriers, such as:Existing anchoring and tensioning equipment are needed generally by being bolted Processing mounting holes on girder steel to be reinforced can destroy the globality of girder steel, reduce the bearing capacity of girder steel.
Therefore, there is an urgent need for a kind of new stretching and anchoring device and methods.
Invention content
Stretch-draw anchor experimental provision and side the purpose of the present invention is to provide a kind of pre-stressed carbon fiber plate reinforcing steel beam Method, to solve above-mentioned technical problem.The stretching and anchoring device and method of the present invention, can not destroy the whole of original steel construction Body will not reduce the bearing capacity of original steel construction;It is easy to operate, cost can be reduced, improves efficiency.
In order to achieve the above objectives, the present invention uses following technical scheme:
A kind of stretch-draw anchor experimental provision of pre-stressed carbon fiber plate reinforcing steel beam, including:Anchor fixture and tensioning equipment; The quantity at least two of fixture is anchored, anchoring fixture includes upper clamp plate and lower clamp plate, and upper clamp plate and lower clamp plate are filled by connecting It puts connection and CFRP plates can be fixed on and treated on reinforcing steel beam;Tensioning equipment includes stretch-draw anchor beam;It is fixed on stretch-draw anchor beam It is provided with limiting exterior deckle board;The front end-plate of limiting exterior deckle board is provided with CFRP plate through-holes, and CFRP plates can pass through CFRP plate through-holes; The medial surface of left plate and right plate for limiting exterior deckle board is both provided with grooved tracks, is slided in grooved tracks and is provided with tensioning folder Tool, the CFRP board clampings that tension clamp can will stretch into;The end plate of limiting exterior deckle board is provided with installation through-hole, in installation through-hole It is slidably fitted with pre-stressed bolt;One end that pre-stressed bolt stretches into limiting exterior deckle board is fixedly connected with tension clamp, the other end It is provided with drawing anchor slab;It draws and is provided with jack between anchor slab and the end plate for limiting exterior deckle board, jack is capable of providing prestressing force The tensile force of bolt.
Further, the lower surface of upper clamp plate is provided with friction groove.
Further, tension clamp includes upper tensioning clamping plate and lower tensioning clamping plate, upper tensioning clamping plate and lower tensioning clamping plate energy Enough it is fixedly connected by attachment device;Lower tensioning clamping plate is slideably positioned in the grooved tracks of limiting exterior deckle board, lower tensioning clamping plate It is fixedly connected with pre-stressed bolt, the lower surface of the upper surface of lower tensioning clamping plate and upper tensioning clamping plate is both provided with friction groove.
Further, the upper surface of lower tensioning clamping plate is provided with installation groove, and upper tensioning clamping plate is set in installation groove.
Further, friction groove is waveform striped.
Further, attachment device is bolt.
Further, it limits and jacking backing plate is provided between the end plate of exterior deckle board and jack, jack is with drawing anchor slab Between be provided with jacking backing plate.
Further, it limits and is provided with bolt-nut on the pre-stressed bolt between the end plate of exterior deckle board and drawing anchor slab.
A kind of stretch-draw anchor experimental method of pre-stressed carbon fiber plate reinforcing steel beam, it is fine based on any of the above-described kind of prestressing force carbon The stretch-draw anchor experimental provision of plate reinforcing steel beam is tieed up, specific steps include:
Step 01, CFRP plates are placed in the surface for treating reinforcing steel beam, are pasted with binding agent, adjustment stretch-draw anchor experiment dress It puts, makes CFRP plates through-hole concordant with CFRP plates, make stretch-draw anchor beam with treating that reinforcing steel beam is parallel, stretch-draw anchor beam is reinforced with waiting Girder steel is fixedly connected;
Step 02, by anchoring fixture, the one end of CFRP plates far from stretch-draw anchor beam is fixed on and is treated on reinforcing steel beam, The other end of CFRP plates passes through the CFRP plate through-holes of limiting exterior deckle board to be fixed on tension clamp;
Step 03, start limiting exterior deckle board and draw the jack between anchor slab, jack is by drawing anchor slab to stretch prestressing force Bolt is to default stress value;
Step 04, by anchoring fixture, CFRP plates close to one end of stretch-draw anchor beam is fixed on and are treated on reinforcing steel beam, from Treat that CFRP plates are cut in the junction of reinforcing steel beam and stretch-draw anchor beam;
Step 05, treat that reinforcing steel beam removes stretch-draw anchor beam certainly.
Further, in step 02 or step 04, CFRP plates are fixed on by anchoring fixture and treat have on reinforcing steel beam Body includes:The lower clamp plate for anchoring fixture is welded on and is treated on reinforcing steel beam, by one end of CFRP plates as the upper folder of anchoring fixture Plate and between treating reinforcing steel beam, tightens upper clamp plate and the attachment device on lower clamp plate, CFRP plates is fixed on and are treated on reinforcing steel beam.
Relative to the prior art, the invention has the advantages that:
CFRP plates are fixed on girder steel to be reinforced by the stretch-draw anchor experimental provision of the present invention by anchoring fixture, are avoided It treats the trepanning of reinforcing steel beam, the integrality of girder steel will not be destroyed, the bearing capacity of girder steel will not be weakened;Anchoring fixture passes through company After connection device clamps, certain pressure can be applied to CFRP plates, be conducive to improve the ability that binding agent transmits load;Tensioning is pressed from both sides Tool is set in the grooved tracks of limiting exterior deckle board, is limited by groove, can effectively prevent the tensioning caused by bias It is uneven;It is easy to operate, can Reusability, can not only reduce experimental cost, but also conventional efficient can be improved, have higher valency Value.
Further, it by setting friction groove in the lower surface of upper clamp plate, can improve between upper clamp plate and CFRP plates Frictional force is conducive to anchor clamp CFRP plates.
Further, by the way that upper tensioning clamping plate is connected with lower tensioning Boards wall, CFRP plates folder therein will can be stretched into Tightly, lower tensioning clamping plate is placed in grooved tracks, tensile force can be prevented eccentric, drive lower tensioning clamping plate can by pre-stressed bolt Prestressing force is applied to CFRP plates;Pass through setting friction groove, it is possible to increase the frictional force between tension clamp and CFRP plates is conducive to Tension clamp clamps CFRP plates.
Further, it is bolted, cost is relatively low, easy to operate.
Further, backing plate is jacked by setting, can prevents from deforming when by the top lift of jack.
Further, the pre-stressed bolt for being loaded onto default prestress value can be fixed on by limiting outline border by bolt-nut On plate, lifting jack unloading can be removed at this time, the utilization rate of equipment can be improved.
The stretch-draw anchor experimental method of the pre-stressed carbon fiber plate reinforcing steel beam of the present invention, conventional efficient is higher, tests into This is relatively low, easy to operate, and experimental result accuracy is high.
Description of the drawings
Fig. 1 is that a kind of overall structure of the stretch-draw anchor experimental provision of pre-stressed carbon fiber plate reinforcing steel beam of the present invention is shown It is intended to;
Fig. 2 is the overlooking the structure diagram of Fig. 1;
Fig. 3 is the structure diagram that fixture is anchored in Fig. 1;
Fig. 4 is the structure diagram of the limiting exterior deckle board in Fig. 1;
Fig. 5 is the structure diagram of the tension clamp in Fig. 1;
Fig. 6 is the structure diagram of friction groove in the tension clamp in Fig. 5;
In Fig. 1 to Fig. 6,1 treats reinforcing steel beam;2 anchoring fixtures;3 bolts;4 stretch-draw anchor beams;5 limiting exterior deckle boards;6 tensioning Fixture;7 jack;8 pre-stressed bolts;9 draw anchor slab;10CFRP plates;11 bolt-nuts.
Specific embodiment
The present invention is described in further details in the following with reference to the drawings and specific embodiments.
Referring to figs. 1 to Fig. 6, a kind of stretch-draw anchor experimental provision of pre-stressed carbon fiber plate reinforcing steel beam of the invention, packet It includes:Anchor fixture 2 and tensioning equipment.
Referring to figs. 1 to Fig. 3, the quantity at least two of fixture 2 is anchored, anchoring fixture 2 includes upper clamp plate and lower clamp plate, on Clamping plate and lower clamp plate are correspondingly arranged on connecting hole, connection bolt 3 are equipped in connecting hole, upper clamp plate and lower clamp plate pass through bolt 3 CFRP plates 10 can be fixed on by connection to be treated on reinforcing steel beam 1.The lower surface of upper clamp plate is provided with friction groove, and friction groove is Waveform striped, lower clamp plate are welded in parallel on the edge of a wing for the both sides for treating reinforcing steel beam 1.CFRP plates 10 be placed in upper clamp plate with it is to be added Gu between girder steel 1.
With reference to figure 1 and Fig. 2, fig. 4 to fig. 6, tensioning equipment includes stretch-draw anchor beam 4;It is fixedly installed on stretch-draw anchor beam 4 Limit exterior deckle board 5.The front end-plate of limiting exterior deckle board 5 is provided with CFRP plate through-holes, and CFRP plates 10 can pass through CFRP plate through-holes;Limit The position left plate of exterior deckle board 5 and the medial surface of right plate are both provided with grooved tracks, are slided in grooved tracks and are provided with tensioning folder Tool 6, both sides and the grooved tracks of tension clamp 6 are in close contact, and tension clamp 6 can clamp the CFRP plates 10 stretched into;Limiting The end plate of exterior deckle board 5 is provided with installation through-hole, and pre-stressed bolt 8 is slidably fitted in installation through-hole;Pre-stressed bolt 8 stretches into One end of limiting exterior deckle board 5 is fixedly connected with tension clamp 6, and the other end, which is provided with, draws anchor slab 9, limits the end plate of exterior deckle board 5 With drawing bolt-nut 11 is provided on the pre-stressed bolt 8 between anchor slab 9.
It draws and is provided with jack 7 between anchor slab 9 and the end plate for limiting exterior deckle board 5, jack 7 is capable of providing prestressing force spiral shell The tensile force of bolt 8.Be provided with jacking backing plate between the limiting end plate of exterior deckle board 5 and jack 7, jack 7 with draw anchor slab 9 it Between be provided with jacking backing plate.
Tension clamp 6 includes upper tensioning clamping plate and lower tensioning clamping plate, and the upper surface of lower tensioning clamping plate is provided with installation groove, Upper tensioning clamping plate is set in installation groove, is correspondingly arranged on connecting hole on upper tensioning clamping plate and lower tensioning clamping plate, can be passed through Bolt 3 is fixedly connected;Lower tensioning clamping plate is slideably positioned in the grooved tracks of limiting exterior deckle board 5, is provided on lower tensioning clamping plate Bolt hole is fixedly connected, the lower surface of the upper surface of lower tensioning clamping plate and upper tensioning clamping plate by bolt hole with pre-stressed bolt 8 Friction groove is both provided with, friction groove is waveform striped.
A kind of stretch-draw anchor experimental method of pre-stressed carbon fiber plate reinforcing steel beam, it is fine based on any of the above-described kind of prestressing force carbon The stretch-draw anchor experimental provision of plate reinforcing steel beam is tieed up, specific steps include:
Step 01, CFRP plates 10 are placed in the surface for treating reinforcing steel beam 1, are pasted with binding agent, adjustment stretch-draw anchor experiment Device makes CFRP plates through-hole concordant with CFRP plates 10, makes stretch-draw anchor beam 4 parallel with treating reinforcing steel beam 1, is treating reinforcing steel beam 1 The default connecting hole of one end welding end plate, by bolt by stretch-draw anchor beam 4 with treating that reinforcing steel beam 1 is fixedly connected;
Step 02, by anchoring fixture 2, the one end of CFRP plates 10 far from stretch-draw anchor beam 4 is fixed on and treats reinforcing steel beam 1 On, the other end of CFRP plates 10 passes through the CFRP plate through-holes of limiting exterior deckle board 5 to be fixed on tension clamp 6;
Step 03, start limiting exterior deckle board 5 and draw the jack 7 between anchor slab 9, jack 7 is pre- by the way that anchor slab 9 is drawn to stretch Stress bolt 8 is to default stress value;
Step 04, by anchoring fixture 2, CFRP plates 10 close to one end of stretch-draw anchor beam 4 is fixed on and treat reinforcing steel beam 1 On, treat that CFRP plates 10 are cut in reinforcing steel beam 1 and the junction of stretch-draw anchor beam 4 certainly;
Step 05, treat that reinforcing steel beam 1 removes stretch-draw anchor beam 4, the performance of the girder steel after record reinforcing, the tensioning unloaded certainly It is reusable to anchor experimental provision.
Wherein, in step 02 or step 04, CFRP plates 10 are fixed on by anchoring fixture 2 and treat have on reinforcing steel beam 1 Body includes:The lower clamp plate for anchoring fixture 2 is welded on and is treated on reinforcing steel beam 1, by one end of CFRP plates 10 as anchoring fixture 2 Upper clamp plate and between treating reinforcing steel beam 1, tightens upper clamp plate and the attachment device on lower clamp plate, CFRP plates 10 is fixed on and wait to reinforce On girder steel 1.

Claims (10)

1. a kind of stretch-draw anchor experimental provision of pre-stressed carbon fiber plate reinforcing steel beam, which is characterized in that including:Anchor fixture (2) and tensioning equipment;
The quantity at least two of fixture (2) is anchored, anchoring fixture (2) includes upper clamp plate and lower clamp plate, upper clamp plate and lower clamp plate CFRP plates (10) can be fixed on and be treated on reinforcing steel beam (1) by attachment device connection;
Tensioning equipment includes stretch-draw anchor beam (4);Limiting exterior deckle board (5) is fixedly installed on stretch-draw anchor beam (4);Limit outline border The front end-plate of plate (5) is provided with CFRP plate through-holes, and CFRP plates (10) can pass through CFRP plate through-holes;Limit a left side for exterior deckle board (5) The medial surface of side plate and right plate is both provided with grooved tracks, is slided in grooved tracks and is provided with tension clamp (6), tension clamp (6) the CFRP plates (10) stretched into can be clamped;The end plate of limiting exterior deckle board (5) is provided with installation through-hole, in installation through-hole It is slidably fitted with pre-stressed bolt (8);Pre-stressed bolt (8) stretches into one end of limiting exterior deckle board (5) and tension clamp (6) is fixed Connection, the other end, which is provided with, draws anchor slab (9);It draws and is provided with jack between anchor slab (9) and the end plate for limiting exterior deckle board (5) (7), jack (7) is capable of providing the tensile force of pre-stressed bolt (8).
2. a kind of stretch-draw anchor experimental provision of pre-stressed carbon fiber plate reinforcing steel beam according to claim 1, feature It is, the lower surface of upper clamp plate is provided with friction groove.
3. a kind of stretch-draw anchor experimental provision of pre-stressed carbon fiber plate reinforcing steel beam according to claim 1, feature It is, tension clamp (6) includes upper tensioning clamping plate and lower tensioning clamping plate, and upper tensioning clamping plate and lower tensioning clamping plate can pass through connection Device is fixedly connected;
Lower tensioning clamping plate is slideably positioned in the grooved tracks of limiting exterior deckle board (5), and lower tensioning clamping plate is solid with pre-stressed bolt (3) The lower surface of fixed connection, the upper surface of lower tensioning clamping plate and upper tensioning clamping plate is both provided with friction groove.
4. a kind of stretch-draw anchor experimental provision of pre-stressed carbon fiber plate reinforcing steel beam according to claim 3, feature It is, the upper surface of lower tensioning clamping plate is provided with installation groove, and upper tensioning clamping plate is set in installation groove.
5. a kind of stretch-draw anchor experimental provision of pre-stressed carbon fiber plate reinforcing steel beam according to Claims 2 or 3, special Sign is that friction groove is waveform striped.
6. a kind of stretch-draw anchor experimental provision of pre-stressed carbon fiber plate reinforcing steel beam according to claim 1 or 3, special Sign is that attachment device is bolt (3).
7. a kind of stretch-draw anchor experimental provision of pre-stressed carbon fiber plate reinforcing steel beam according to claim 1, feature It is, jacking backing plate is provided between the end plate of limiting exterior deckle board (5) and jack (7), jack (7) is with drawing anchor slab (9) Between be provided with jacking backing plate.
8. a kind of stretch-draw anchor experimental provision of pre-stressed carbon fiber plate reinforcing steel beam according to claim 1, feature It is, bolt-nut (11) is provided on the pre-stressed bolt (8) between the end plate of limiting exterior deckle board (5) and drawing anchor slab (9).
9. a kind of stretch-draw anchor experimental method of pre-stressed carbon fiber plate reinforcing steel beam, which is characterized in that based on claim 1 to A kind of any one of 8 stretch-draw anchor experimental provisions of pre-stressed carbon fiber plate reinforcing steel beam, specific steps include:
Step 01, CFRP plates (10) are placed in the surface for treating reinforcing steel beam (1), are pasted with binding agent, adjustment stretch-draw anchor experiment Device makes CFRP plates through-hole concordant with CFRP plates (10), makes stretch-draw anchor beam (4) parallel with treating reinforcing steel beam (1), by tensioning anchor Gu Liang (4) is with treating that reinforcing steel beam (1) is fixedly connected;
Step 02, by anchoring fixture (2), the one end of CFRP plates (10) far from stretch-draw anchor beam (4) is fixed on steel to be reinforced On beam (1), the other end of CFRP plates (10) passes through the CFRP plate through-holes of limiting exterior deckle board (5) to be fixed on tension clamp (6);
Step 03, start limiting exterior deckle board (5) and draw the jack (7) between anchor slab (9), jack (7) is by drawing anchor slab (9) Pre-stressed bolt (8) is stretched to default stress value;
Step 04, by anchoring fixture (2), CFRP plates (10) are fixed on steel to be reinforced close to one end of stretch-draw anchor beam (4) On beam (1), treat that CFRP plates (10) are cut in reinforcing steel beam (1) and the junction of stretch-draw anchor beam (4) certainly;
Step 05, treat that reinforcing steel beam (1) removes stretch-draw anchor beam (4) certainly.
10. a kind of stretch-draw anchor experimental method of pre-stressed carbon fiber plate reinforcing steel beam according to claim 9, feature Be, in step 02 or step 04, be fixed on by anchoring fixture (2) by CFRP plates (10) treat it is specific on reinforcing steel beam (1) Including:
The lower clamp plate for anchoring fixture (2) is welded on and is treated on reinforcing steel beam (1), by one end of CFRP plates (10) as anchoring fixture (2) upper clamp plate and between treating reinforcing steel beam (1), tightens upper clamp plate and the attachment device on lower clamp plate, and CFRP plates (10) is solid It is scheduled on and treats on reinforcing steel beam (1).
CN201810060769.0A 2018-01-22 2018-01-22 The stretch-draw anchor experimental provision and method of a kind of pre-stressed carbon fiber plate reinforcing steel beam Pending CN108169020A (en)

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CN201810060769.0A CN108169020A (en) 2018-01-22 2018-01-22 The stretch-draw anchor experimental provision and method of a kind of pre-stressed carbon fiber plate reinforcing steel beam

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CN201810060769.0A CN108169020A (en) 2018-01-22 2018-01-22 The stretch-draw anchor experimental provision and method of a kind of pre-stressed carbon fiber plate reinforcing steel beam

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CN108169020A true CN108169020A (en) 2018-06-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113356472A (en) * 2021-07-02 2021-09-07 江苏建华建设有限公司 Novel bonded prestressed carbon fiber plate-steel composite beam structure and manufacturing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113356472A (en) * 2021-07-02 2021-09-07 江苏建华建设有限公司 Novel bonded prestressed carbon fiber plate-steel composite beam structure and manufacturing method thereof

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