CN207406031U - A kind of flexibility FRP sheet material pre-stress stretching devices - Google Patents
A kind of flexibility FRP sheet material pre-stress stretching devices Download PDFInfo
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- CN207406031U CN207406031U CN201721324837.7U CN201721324837U CN207406031U CN 207406031 U CN207406031 U CN 207406031U CN 201721324837 U CN201721324837 U CN 201721324837U CN 207406031 U CN207406031 U CN 207406031U
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- frp sheet
- ripple plate
- spool
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- sheet materials
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Abstract
The utility model discloses a kind of flexibility FRP sheet material pre-stress stretching devices, including reaction frame, screw rod, locking nut, FRP sheet material fixtures, the screw rod other end is connected with stretch power device, the FRP sheet materials fixture includes upper ripple plate, lower ripple plate, spool, fixing bolt, the inner surface that the upper ripple plate and lower ripple plate fit is provided with the corrugated concave-convex curved surface being mutually matched, the inner surface of the upper ripple plate and lower ripple plate is formed with cylindrical cavity in one end close to screw rod, the spool, which is fixed by positioning device, to be arranged in cylindrical cavity, flexible FRP sheet materials stretch out after spool winding is pasted from the upper horizontal of spool.The utility model has the characteristics that small, light-weight, easy to operate, it is convenient to applied to laboratory experiment and construction site, the shortcomings that slip when avoiding flexible FRP sheet materials tensioning in fixture, improve tensioning efficiency and the stress distribution of FRP.
Description
Technical field
The utility model patent is related to prestressed structure engineering field, especially for solution flexibility FRP sheet materials in tensioning
Easily slip causes clamping effect bad and reduces a kind of pre-stress stretching device of stress distribution in fixture in the process.
Background technology
Using fibre reinforced composites（Fiber Reinforced Polymer, FRP）To reinforced concrete structure, steel
Structure, timber structure, masonry structure etc. are reinforced, and are a kind of advanced reinforcement means.The side of passive enforcement is carried out with pasting FRP
Method is compared, and structure is reinforced using the FRP sheet materials through prestressed stretch-draw, can more fully hereinafter play FRP high strength characteristics,
Improve the stress distribution in reinforced structure, inhibit malformation and the germinating of crackle and extension, improve and reinforce efficiency, finally reach
To the purpose of effectively extending structure service life, there is important social and economic benefit.
It, in order to reach purpose efficient, reliable, durable, economic and easy to use for pre-stress FRP reinforcement technique
Ask the technology of each master operations such as the clamping, tensioning, anchoring of pre-stress FRP, method and device all must be constructed around how realizing
" reduce the loss of prestress of system as far as possible, improve stress distribution " this objectives.Therefore, it is desirable that corresponding fixture tool
The features such as holding tight, on-slip, not causing damage to FRP, FRP uniform forces can be made, is small and exquisite；It is required that method for stretching and dress
Putting has the characteristics that make high FRP uniform stresseds, stress distribution, Stress Control and easy to operate；It is required that anchorage it is firm it is firm,
The features such as durable, anti-loosening.
According to above-mentioned requirements, the special anchor/fixture of existing FRP sheet materials is made a general survey of, such as " the high intensity of Application No. 02244587.0
Composite material waveform tooth clamp anchor " patent and Application No. 03117814.6 " clamping and anchoring high strength composite it is new
Anchor clamp described in method " patent is that FRP sheet materials are coincide clamping by upper and lower two pieces of waveform tooth plates, then by bolt by it is upper,
Lower anchor slab is close, reaches clamping and anchoring effect.Such fixture relies primarily on waveform tooth plate and the frictional force of FRP sheet materials is pressed from both sides
It holds and is anchored, clamping and anchoring effect are bad when stress distribution is larger, easily skid.
Above-mentioned Patent Utility Model people is in another patent（A kind of " wave-shaped tooth clamper of Application No. 200820097782.5
The pressing device of anchor "）In, by locking device by high-strength bolt be changed to jack and hydraulic system locked above and below two blocks of ripples
Shape tooth plate solves the hypodynamic shortcoming of fastening.But due to adding jack and hydraulic system so that package unit becomes multiple
It is miscellaneous, build is huge, cost is high, it has not been convenient to operate, be also unfavorable for engineering popularization and application.Patent Utility Model people is another specially at its
Profit（" prestressing force stretching high strength composite material and the construction method of anchoring " of Application No. 02128047.9）Related FRP sheet materials
Stretching plan in, by increase between two anchorages waveform tooth plate fixture force FRP sheet materials be deformed applying it is pre- should
Power, but the stress distribution applied is relatively low and stress distribution size is more difficult to control.
Other special anchor/fixtures of FRP sheet materials, such as " the wedged variable-corrugated intermediate plate fiber of Application No. 200710035129.6
Sheet material Special ground tackle " patent is that FRP sheet materials are passed through outer anchor shell, and is clipped between the wedged variable-corrugated intermediate plate of two panels up and down, is passed through
High-strength bolt adjusts the distance of pressure cover and outer anchor shell, and FRP sheet materials are clamped so as to which wedge-shaped intermediate plate be promoted to apply pressure.The patent is public
In the pre-stress stretching method opened, which is used in Post-tension Prestress Construction need to be used to press from both sides using improved jack
FRP sheet materials are held, and jack directly clamps flexible FRP sheet materials there is also anchorage problem, so the versatility of the patent is bad；Separately
Outside when it is used for stretching end, upper and lower contoured clips can generate compared with macrolesion FRP, and due to the waveform of self-lock mechanism compression
Intermediate plate is not easy to unclamp, operating difficulties.The patentee is in another patent（" the combined variable ripple of Application No. 200810031451.6
Line fibre sheet material Special ground tackle and its prestressed stretch-draw "）It is middle to be changed to adjust using the top pull device of fluid pressure type by locking mode
The position of contoured clips, convenient for being anchored and unclamping FRP sheet materials.But increasing hydraulic system can equally cause package unit to become multiple
Miscellaneous, build is huge and cost is high, operating difficulties, is unfavorable for engineering popularization and application.
On the method that prestressed stretch-draw is carried out to FRP sheet materials, such as " the FRP sheet materials of Application No. 201010137082.0
Anchorage and its anchoring process " patent is to be placed in FRP sheet materials upper anchor slab and lower anchor slab through bellows, and upper anchor slab is under
FRP sheet materials coincide clamping by anchor slab, then by bolt that upper and lower anchor slab is close.FRP sheet materials stretching plan disclosed in the patent
It is that the fixture that stretching end uses is Wedge gripping, fixing end uses waveform fixture, and the operation principle of two kinds of fixtures is different, and wedge
Clamp is bad for the clamping effect of flexible FRP sheet materials, and easily FRP is caused to damage, the complex process in strengthening construction,
There are some potential safety problemss during normal work.
" the wraparound formula waveform anchor and its pre- method for stretching for fibre sheet material " of Application No. 201410077668.6 is specially
Profit is the both ends for holding and anchoring FRP sheet materials by wraparound formula waveform grip, pulls one end wraparound formula waveform anchor, realizes FRP sheet materials
Longitudinal tensioning.There is the major defect of FRP sheet materials stretching plan disclosed in the patent：1）By pulling wraparound formula waveform anchor come real
The tensioning of existing FRP sheet materials, in stretching process, one end arc convex of wraparound formula waveform anchor can generate upper and lower waveform tooth plate
Separating force easily makes upper and lower waveform tooth plate generate gap, causes the slip of sheet material, compare in itself especially for flexible sheet material
It is sliding, it is easier to the slip in stretching process to be caused to relax, tensioning inefficiency；2）Carbon fibre reinforced composite（CFRP）It is anti-
It is weak to cut ability, is clamped using wraparound formula, the wraparound end size increase of inevitable requirement fixture；3）Wraparound formula waveform anchor and upper and lower ripple
The split of shape tooth plate designs, anchor with and shape of the upper and lower waveform tooth plate in contact position precision of coincideing it is high, so processing technology is carried
Higher requirement is gone out.
In conclusion the anchor clamp of existing FRP sheet materials will reach design efficient, reliable, durable, economic and easy to use
It is required that there is certain distance.
Utility model content
For above-mentioned technical problem, the purpose of this utility model is to provide a kind of flexibility FRP sheet material pre-stress stretching devices
And method, so as to solve the problems, such as that flexible sheet material easily slides in fixture in stretching process, FRP sheet material discontinuity,
Reduce in stretching process due to slip and caused by loss of prestress, improve tensioning efficiency.
The technical solution of the utility model is as follows：
A kind of flexibility FRP sheet material pre-stress stretching devices, including two reaction frames spaced apart being oppositely arranged, often
A reaction frame is connected with FRP sheet material fixtures by screw rod and locking nut respectively, the screw rod of one of connection FRP sheet material fixtures
The other end is connected with stretch power device, and the FRP sheet materials fixture includes upper ripple plate, lower ripple plate, cylindrical spool, fixation
The inner surface that bolt, the upper ripple plate and lower ripple plate fit is provided with the corrugated concave-convex curved surface being mutually matched, can be to flexibility
FRP sheet materials play the role of clamping and increase friction and on-slip.Wherein, the inner surface of the upper ripple plate and lower ripple plate is close to spiral shell
One end of bar is formed with cylindrical cavity, and the spool, which is fixed by positioning device, to be arranged in the cylindrical cavity, flexible FRP
Sheet material stretches out after spool winding is pasted from the upper horizontal of spool, and FRP sheet materials are reduced in stretching process to upper and lower to reach
The effect of the separating force of ripple plate, the upper ripple plate are fixedly connected with lower ripple plate by fixing bolt.
Further, the positioner includes pin, is provided through on the upper ripple plate and spool and institute
State the matched pin hole of pin, to spool play the role of positioning with it is fixed, prevent rotation and displacement.
Further, the positioner includes screw, is provided through on the upper ripple plate and spool and institute
State the matched screw hole of screw, to spool play the role of positioning with it is fixed, prevent rotation and displacement.
Further, the stretch power device uses jack.
Further, the reaction frame is bolted on pedestal.
Further, the bottom of the FRP sheet materials fixture is provided with movable support, prevents FRP sheet materials fixture because of weight
Power and influence stress.
Further, described screw rod one end is fixedly connected by screw thread with the lower ripple plate, and the other end passes through reaction frame
It is connected after connecting hole by locking nut.
Compared with prior art, the beneficial effects of the utility model are：To flexible FRP sheet materials（FRP cloth, thin fiber board etc.）Into
During row stretch-draw prestressing force, flexibility is avoided by carrying out the double action of end winding and corrugated clamping to FRP flexible sheet materials
Slip of the FRP sheet materials in fixture increases prestressed stretch-draw degree, improves tensioning efficiency.Whole device is small and exquisite, safely may be used
It leans on, it is easy to operate, laboratory and various construction sites can be conveniently used in.
Description of the drawings
Fig. 1 is the structure diagram of the utility model fixture and screw rod.
Fig. 2 is the Structure explosion diagram of the utility model fixture screw rod.
Fig. 3 is the use schematic diagram of the utility model device.
Reference numeral：1- upper ripple plates, ripple plate under 2-, 3 cylindrical cavities, 4- spools, 5- fixing bolts, 6- screw rods, 7- pins,
8- reaction frames, 9- flexibility FRP sheet materials, 10- jack, 11- locking nuts.
Specific embodiment
The purpose of utility model of the utility model is described in further detail in the following with reference to the drawings and specific embodiments,
Embodiment cannot repeat one by one herein, but therefore the embodiment of the utility model is not defined in following embodiment.
As shown in Figure 1 to Figure 3, a kind of flexibility FRP sheet material pre-stress stretching devices are spaced apart opposite including two
The reaction frame 8 of setting, the reaction frame 8 are bolted on pedestal, and each reaction frame 8 passes through screw rod 6 and locking respectively
Nut 11 is connected with FRP sheet material fixtures, and 6 other end of screw rod of one of connection FRP sheet material fixtures is connected with stretch power dress
It puts, the stretch power device uses jack 10；The FRP sheet materials fixture includes upper ripple plate 1, lower ripple plate 2, cylinder
Spool 4, fixing bolt 5, it is recessed that the inner surface that the upper ripple plate 1 and lower ripple plate 2 fit is provided with the corrugated being mutually matched
Convex surface can play the role of flexible FRP sheet materials clamping and increase friction and on-slip.Wherein, the upper ripple plate 1 and lower ripple plate
2 inner surface is formed with cylindrical cavity 3 in one end close to screw rod 6, and the spool 4, which is fixed by positioning device, is arranged on institute
It states in cylindrical cavity 3, flexible FRP sheet materials stretch out after the winding of spool 4 is pasted from the upper horizontal of spool 4, to reach in tensioning
Effect of the FRP sheet materials to the separating force of upper and lower ripple plate is reduced in the process, and the upper ripple plate 1 and lower ripple plate 2 are solid by fixing bolt 5
Fixed connection.
The positioner includes two pins 7, be provided through on the upper ripple plate 1 and spool 4 two with
Pin 7 during installation, is inserted into the pin hole on upper ripple plate 1 and spool 4, you can to spool by the 7 matched pin hole of pin
Play the role of positioning with it is fixed, prevent rotation and displacement.
In addition, the bottom of the FRP sheet materials fixture is provided with movable support, prevent FRP sheet materials fixture due to gravity
Influence stress.Described 6 one end of screw rod is fixedly connected by screw thread with the lower ripple plate 2, and the other end passes through the connecting hole of reaction frame 8
It is connected afterwards by locking nut 11.
In the utility model in another feasible embodiment, the positioner includes screw, the upper ripple plate 1
Be provided through on spool 4 with the matched screw hole of the screw, during installation, screw is screwed in the upper ripple plate 1
With the screw hole on spool 4, you can to spool play the role of positioning with it is fixed, prevent rotation and displacement.
A kind of flexible FRP sheet materials pre-stress stretching method based on described device, including step：
1) fixing bolt 5 is unclamped, upper ripple plate 1 and lower ripple plate 2 is separated, the one ends wound of flexible FRP sheet materials 9 is pasted
It is put into spool 4, then by the spool 4 after winding FRP sheet materials in the cylindrical cavity of lower ripple plate 2, and will wind and be pasted on spool 4
Flexible FRP sheet materials 9 stretched out from the upper horizontal of spool 4, in order to reduce and generated in stretching process to upper ripple plate
Separating force, increases the frictional force of FRP sheet materials and waveform fixture, and increases the stretch-draw prestressing force degree of FRP sheet materials；
2) flexibility FRP sheet materials 9 cover upper ripple plate 1 after lower ripple plate 2 tiles and tenses, with positioner by 4 He of spool
Upper ripple plate 1 is fixed together, and spool 4 is avoided to be rotated in cavity 3, is then twisted upper ripple plate 1 and lower ripple plate 2 with fixing bolt 5
Tightly；
3) step 1) is repeated with 2), and the other end of flexible FRP sheet materials 9 and another FRP sheet materials fixture are installed and clamped；
4) one end of two screw rods 6 is screwed into respectively in the screw hole of two fixtures, the other end is inserted respectively into the anti-of both ends
In power frame 8, then it is fixedly connected by locking nut 11；
5) by having stretch power device to flexible 9 stretch-draw prestressing force of FRP sheet materials, when reaching the degree of prestressing of setting,
Tighten the locking nut 11 of screw rod 6 and reaction frame 8.
In addition, in the step 5), before having stretch power device to flexible 9 stretch-draw prestressing force of FRP sheet materials, first adjust
The relative position of two reaction frames 8 makes the cable tensios control of flexible FRP sheet materials 9 in the stroke range of stretch power device.
The utility model is by analyzing loading characteristic of the flexible FRP sheet materials in stretching process, it is proposed that a kind of
For flexible FRP sheet materials pre-stress stretching device and method.Above-described embodiment by FRP flexible sheet materials carry out end winding and
The double action of corrugated clamping avoids slip of the flexible FRP sheet materials in fixture, and cylindrical type is devised in fixture
Cavity, make in the spool that flexible FRP sheet materials dispose in cylindrical cavity winding paste it is fixed after protrude horizontally up, in stretching process
The separating force of upper and lower ripple plate is reduced, adds the frictional force of FRP sheet materials and upper and lower ripple plate, so as to avoid flexible FRP sheet materials
Slip, increase the stretch-draw prestressing force degree of FRP sheet materials.
Wherein, upper ripple plate 1 and lower 2 inner face of ripple plate are designed with corrugated curved surface, and concave-convex identical curved surface is played to soft up and down
The clamping action of property FRP sheet materials.Wherein, the inner surface of the upper ripple plate 1 and lower ripple plate 2 is formed in one end close to screw rod 6
Cylindrical cavity 3, the spool 4, which is fixed by positioning device, to be arranged in the cylindrical cavity 3, as to flexible FRP sheet materials
Fixed component is pasted in the winding of end.The design that the cylindrical cavity 3 sinks, make flexible FRP sheet materials wound by spool after energy
It enough protrudes horizontally up, reduces in FRP stretching processes to the upward separating force of upper ripple plate.The utility model is except to flexible FRP
Sheet material is carried out outside prestressed stretch-draw, can also be applied to the prestressed stretch-draw of other flexible materials.
The spool is fixed by the pin hole at both ends using pin with upper ripple plate.Upper ripple plate 1 and lower ripple plate 2 pass through fixed spiral shell
Bolt 5 is attached fixation.Entire pre-stress stretching device is carried out by screw rod 6 and reaction frame 8, jack 10 and locking nut 11
Anchoring, fully meets design requirement efficient, reliable, durable, economic and easy to use.
Above-described embodiment of the utility model is only intended to clearly illustrate the utility model example, and is not
Restriction to the embodiment of the utility model.For those of ordinary skill in the art, on the basis of above description
On can also make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.
All any modification, equivalent and improvement made within the spirit and principle of the utility model etc., should be included in this reality
Within new scope of the claims.
Claims (7)
1. a kind of flexibility FRP sheet material pre-stress stretching devices, including two reaction frames (8) spaced apart being oppositely arranged,
Each reaction frame (8) is connected with FRP sheet material fixtures by screw rod (6) and locking nut (11) respectively, one of connection FRP pieces
Screw rod (6) other end of material fixture is connected with stretch power device, it is characterised in that：
The FRP sheet materials fixture includes upper ripple plate (1), lower ripple plate (2), cylindrical spool (4), fixing bolt (5), described
The inner surface that upper ripple plate (1) and lower ripple plate (2) fit is provided with the corrugated concave-convex curved surface being mutually matched, wherein, it is described on
Ripple plate (1) and the inner surface of lower ripple plate (2) are formed with cylindrical cavity (3), the spool (4) in one end close to screw rod (6)
It is fixed by positioning device and is arranged in the cylindrical cavity (3), flexible FRP sheet materials are after spool (4) winding is pasted from spool
(4) upper horizontal is stretched out, and the upper ripple plate (1) is fixedly connected with lower ripple plate (2) by fixing bolt (5).
2. flexibility FRP sheet material pre-stress stretching devices according to claim 1, it is characterised in that：The positioner
Including pin (7), it is provided through on the upper ripple plate (1) and spool (4) and the pin (7) matched pin
Hole.
3. flexibility FRP sheet material pre-stress stretching devices according to claim 1, it is characterised in that：The positioner
Including screw, it is provided through on the upper ripple plate (1) and spool (4) and the matched screw hole of the screw.
4. flexibility FRP sheet material pre-stress stretching devices according to claim 1, it is characterised in that：The stretch power
Device uses jack (10).
5. flexibility FRP sheet material pre-stress stretching devices according to claim 1, it is characterised in that：The reaction frame (8)
It is bolted on pedestal.
6. flexibility FRP sheet material pre-stress stretching devices according to claim 1, it is characterised in that：The FRP sheet materials fixture
Bottom be provided with movable support.
7. flexibility FRP sheet material pre-stress stretching devices according to claim 1, it is characterised in that：Described screw rod (6) one end
It is fixedly connected by screw thread with the lower ripple plate (2), the other end passes through locking nut (11) after passing through the connecting hole of reaction frame (8)
It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721324837.7U CN207406031U (en) | 2017-10-13 | 2017-10-13 | A kind of flexibility FRP sheet material pre-stress stretching devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721324837.7U CN207406031U (en) | 2017-10-13 | 2017-10-13 | A kind of flexibility FRP sheet material pre-stress stretching devices |
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| Publication Number | Publication Date |
|---|---|
| CN207406031U true CN207406031U (en) | 2018-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721324837.7U Active CN207406031U (en) | 2017-10-13 | 2017-10-13 | A kind of flexibility FRP sheet material pre-stress stretching devices |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107700867A (en) * | 2017-10-13 | 2018-02-16 | 华南理工大学 | A kind of flexible FRP sheet materials pre-stress stretching device and method |
| CN110318558A (en) * | 2019-07-31 | 2019-10-11 | 南方工程检测修复技术研究院 | A kind of pre-stress FRP reinforces the prestress application device and its construction method of column construction |
| CN113846868A (en) * | 2021-11-10 | 2021-12-28 | 河海大学 | Reinforcing device and reinforcing method based on multi-layer fiber cloth prestress application |
-
2017
- 2017-10-13 CN CN201721324837.7U patent/CN207406031U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107700867A (en) * | 2017-10-13 | 2018-02-16 | 华南理工大学 | A kind of flexible FRP sheet materials pre-stress stretching device and method |
| CN110318558A (en) * | 2019-07-31 | 2019-10-11 | 南方工程检测修复技术研究院 | A kind of pre-stress FRP reinforces the prestress application device and its construction method of column construction |
| CN113846868A (en) * | 2021-11-10 | 2021-12-28 | 河海大学 | Reinforcing device and reinforcing method based on multi-layer fiber cloth prestress application |
| CN113846868B (en) * | 2021-11-10 | 2022-11-15 | 河海大学 | Reinforcing device and reinforcing method based on multi-layer fiber cloth prestress application |
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