CN101929221A - Active anchor clamp for fiber reinforced plastic sheet material - Google Patents
Active anchor clamp for fiber reinforced plastic sheet material Download PDFInfo
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- CN101929221A CN101929221A CN 201010107985 CN201010107985A CN101929221A CN 101929221 A CN101929221 A CN 101929221A CN 201010107985 CN201010107985 CN 201010107985 CN 201010107985 A CN201010107985 A CN 201010107985A CN 101929221 A CN101929221 A CN 101929221A
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Abstract
The invention relates to an active anchor clamp for a fiber reinforced plastic sheet material, which comprises an anchor block and a clamp plate arranged in the anchor block, wherein the anchor block is an integral structure in which a through hole is formed, the clamp plate is two-plate type wedge composed of an upper clamp plate and a lower clamp plate which are vertically arranged. The active anchor clamp is characterized in that a force transfer plate which can slide vertically is arranged above the clamp plate in the anchor block, the top surface of the force transfer plate is a flat surface matched with the anchor block, the bottom surface of the force transfer plate is an inclined surface matched with the top surface of the upper clamp plate, the clamp plate forms a tight fit with a wedge-shaped through hole formed between the anchor block and the force transfer plate after being wedged into the anchor block to clamp a fiber reinforced plastic sheet material, and a stressing screw rod penetrates through the anchor block and is arranged at the upper part of the force transfer plate. The clamp plate and an FRP plank can be completely tightened by tightening the stressing screw rod to compress the force transfer plate, and the anchor clamp has a certain gripping capability before the FRP plank is stressed. With the FRP plank being further stressed, the clamp plate retracts a little and realizes further compression, thereby effectively gripping the FRP plank.
Description
Technical field
The present invention relates to a kind of anchor clamp, relate in particular to a kind of when being used for the building structure concrete and adopting the reinforcement of fibre reinforced plastics (FRP) sheet material, the active anchor clamp of the permanent and anchoring temporarily of FRP lath end.
Background technology
In the engineering structures strengthening reconstruction project, have and adopt application specific architecture glue to carry out the technical measures of shallow-layer build-in or surface stickup FRP sheet material.The mode of such measures by pasting, the good tensile strength of performance FRP sheet material can improve the bearing capacity of building structure largely.The pulling force that the FRP sheet material provides is if only be delivered on the concrete structure by structure glue, there is bigger shear stress between FRP lath and the structure glue, between structure glue and the concrete interface, be not enough to transmit the pulling force of FRP sheet material as shear stress, shear failure then takes place, and is unfavorable for the performance of the high-strength performance of FRP sheet material; Before also having the FRP sheet attaching in addition it is applied prestressed technical measures.More than two kinds of situations all need the additional anchor measure is adopted in FRP sheet material end.Shear strength is low owing to the tensile strength height of FRP sheet material, adopts plain bars can cause the FRP sheet material to destroy ahead of time in the anchorage zone with anchor clamp.The additional anchor of FRP sheet material end is current to mainly contain following three kinds:
1. (as: the flat permanent ground tackle publication number of a kind of pre-stressed fiber cloth: CN2804269) it discloses the flat permanent ground tackle of a kind of pre-stressed fiber cloth in bond-anchorage measure, this permanent ground tackle comprises fixed end part and stretch-draw end parts, each part constitutes by steel plate and cloth, and steel plate in the stretch-draw end parts and screw mandrel are as a whole by being welded.The surface of the steel plate in each part all forms 0.5～1.0% the gradient, intersects then and opens U-lag, and cloth forms the flat permanent ground tackle of pre-stressed fiber cloth by the gluing surface of steel plate that is affixed on fluting of resin impregnation.This ground tackle can guarantee that the stretch-draw prestressing force level of pre-stressed fiber cloth reaches more than 65% of its ultimate tensile strength, easily reinforces maintenance to different types of rridges and industrial construction.
This type of anchoring measure is to adopt structure glue that the FRP sheet material is anchored on the high anchor slab of steel plate or other shear strength in advance, again anchor slab is anchored in the relevant position.The shortcoming of this type of anchoring measure is just can work after structure glue such as anchoring need is solidified, and construction period is longer, and can not dismantle.
2. push anchoring measure (as: the carbon beaverboard anchorage publication number that civil construction project is used: CN1827975).This disclosure of the Invention the carbon beaverboard anchorage used of a kind of civil construction project, this ground tackle comprises two clamping plate, pressing plate, hold-down bolt and the anchor bolt up and down that is used to press from both sides carbon fiber board, up and down two clamping plate with the contact surface of carbon fiber board on be provided with the lines that is used to increase friction, the interlude of pressing plate is set as convex, lower plate is provided with the screw that matches with hold-down bolt, make two clamping plate clamping up and down by hold-down bolt by pressing plate, lower plate anchors on the concrete member to be reinforced by anchor bolt.
This type of ground tackle relies on the clamping plate of pre-jam-packed clamping FRP lath fully, and the frictional force between dependence clamping plate and the FRP lath realizes the anchoring to carbon fiber board.The shortcoming of this type of anchoring measure be the FRP lath in loading process, the size of frictional force depends on the friction factor and the fastening force of clamping plate and FRP plate.Fastening force apply too small then frictional force deficiency, the FRP lath easily pulls; The excessive damage that then may cause the FRP lath of fastening force.Because screw rod is understood some stress relaxation phenomenon at high-stress state, to add bolt and have the loosening phenomenon of machinery, fastening force can decrease, and causes anchored force to decrease.
3. anchor clamp anchoring measure (as: carbon beaverboard anchorage publication number: CN101463638)
This invention relates to a kind of ground tackle, the carbon beaverboard anchorage of using in particularly a kind of civil construction project, form by anchor slab and intermediate plate, anchor slab is an integral body, in a wedge shape through hole is arranged, intermediate plate is the two-piece type wedge, its wedging anchor slab clamp behind carbon fiber board with anchor slab in wedge shape through hole tight fit, described anchor slab is that cross section is the square oval or circular cylinder of rectangle, having cross section in it is that rectangle is square oval or circular, the longitudinal section has the wedge shape through hole of tapering, and it is that rectangle is square oval or circular that intermediate plate wedging anchor slab clamps the profile and the interior cross section of anchor slab that close up behind the carbon fiber board, the wedge shape through hole that the longitudinal section has tapering is identical; The clamping face of intermediate plate has one deck carbon fiber board contact reinforcing material; The contact surface of intermediate plate and anchor slab is coated with lubrication oil or lubricating grease.The anchoring property of this ground tackle is reliable, and is simple and compact for structure, making, constructing operation convenience, and the efficient height, the ground tackle shape is varied, can satisfy the requirement of different construction environments.
This type of anchoring measure is to adopt the flat intermediate plate of low-angle to clamp the FRP lath, and during the tension of FRP lath, flat intermediate plate slides and tightens up, and clamps the FRP lath, utilizes the mechanical friction power anchoring FRP lath between flat intermediate plate and the FRP lath.This type of anchoring measure is identical with the principle of anchor clamp with reinforcing bar, and along with the retraction of intermediate plate, anchored force can increase, but this type of anchoring measure equally also has identical loss of prestress, i.e. the loss of prestress σ that contracts and cause in anchor deformation and the FRP lath
L1Design formulas according to this loss of prestress:
In the formula: a---the value that contracts in anchor deformation and the FRP sheet material (mm); L---the distance (mm) between the anchored end; E
s---the modulus of elasticity (MPa) of FRP sheet material.
The modulus of elasticity of FRP sheet material is higher, and less anchor deformation and FRP sheet material neck-in also can cause bigger loss of prestress.
For not adopting prestressed FRP sheet material, need distortion that the strengthening member position produces greater than the value a that contracts in anchor deformation and the FRP sheet material after, just can give full play to the effect of ground tackle, exist FRP sheet material stress hysteresis, be unfavorable for the performance of FRP sheet material effect equally.
Summary of the invention
The present invention is directed to deficiency of the prior art and proposed a kind of active anchor clamp for fiber reinforced plastic sheet material, it is different from the anchor clamp that needs anchor deformation and FRP sheet material retraction could produce chucking power, also is different from the anchor clamp that only produces frictional force clamping FRP sheet material by extruding.It is to utilize to screw afterburning screw rod extruding steel tape, makes flat intermediate plate of low-angle and the complete jam-packed of FRP lath, and anchor clamp promptly possesses certain clamping ability before the FRP lath is stressed.Stressed along with the FRP lath, flat intermediate plate have indivisible retraction and further jam-packed, thereby realize the effective clamping of FRP sheet material.
This programme is realized by following technical measures: active anchor clamp for fiber reinforced plastic sheet material, it comprises anchor block and the intermediate plate that is arranged in the anchor block, described anchor block has the integral body of a through hole in being, upper clip and lower clamping piece that described intermediate plate is made up of the two-piece type wedge of symmetric arrangement up and down, it is characterized in that in anchor block intermediate plate above be provided with the steel tape that slides up and down, the end face of described steel tape is the plane adaptive with anchor block, the bottom surface of steel tape is the inclined-plane adaptive with the upper clip end face, behind the clamped fibers reinforced plastic sheet material and the wedge shape through hole tight fit that forms between anchor block and the steel tape, pass anchor block on the top of steel tape and be provided with afterburning screw rod in the intermediate plate wedging anchor block.
The gradient unanimity of last lower clamping piece, its angle θ all is not more than 5.7 °, and correspondingly inclined-plane and intermediate plate is suitable on steel tape and the anchor block, and smooth surface and scribble lubricant grease.The steel tape upper surface is provided with the stopper slot that inserts for afterburning screw rod, and afterburning screw rod screws the back and inserts stopper slot, can limit steel tape in the displacement perpendicular to afterburning screw axis direction.
Clamping face between the last lower clamping piece is done blasting treatment, with the friction of increase with the FRP lath.
The afterburning screw rod on steel tape top is provided with fastening nut, and the setting of fastening nut can be avoided the loosening of afterburning bolt and intermediate plate, has increased the reliability of anchor clamp.
Beneficial effect of the present invention can learn that test shows that the present invention has eliminated anchor clamp neck-in a substantially, has reduced stress loss owing to be provided with afterburning screw rod and steel tape according to the narration to such scheme, and anchor clamp efficiency factor height is for convenience detach.This anchor clamp is simple and compact for structure, and is easy to operate, is applicable to the permanent and anchoring temporarily of FRP lath, for applying prestressed FRP lath, can reduce the loss of prestress σ that contracts and cause in anchor deformation and the FRP sheet material effectively
L1For not applying prestressed FRP lath, then need not reinforce the position and produce the effect that can bring into play ground tackle greater than the distortion of a value, reduced FRP sheet material stress hysteresis; For the anchor clamp of need dismounting, then can dismantle easily by unscrewing afterburning bolt.Therefore the present invention has compared with prior art realized technical purpose.
The design of intermediate plate and steel tape outer slope θ:
Coefficientoffriction between steel tape and the intermediate plate=0.1 supposes that the pressure that steel tape passes is N, then:
The normal pressure N that N produces the intermediate plate outside
1For:
N
1＝N·cosθ
The stiction F that is produced by normal pressure is:
F＝μ·N
1＝μ·N·cosθ
The tangential force N that N produces the intermediate plate outside
2For:
N
2＝N·sinθ
This tangential force can make intermediate plate that the trend of outside slippage is arranged.
If make intermediate plate when afterburning screw rod is fastening, not produce slippage, need make maximum static friction force F be not less than tangential force N
2, that is: F 〉=N
2
So: μ Ncos θ 〉=Nsin θ
μ·cosθ≥sinθ
tanθ≤μ
θ≤5.7°
Description of drawings
Below in conjunction with accompanying drawing the present invention is done to describe in further detail.Fig. 1 is active anchor clamp for fiber reinforced plastic sheet material assembling effect figure; Fig. 2 is the active anchor clamp for fiber reinforced plastic sheet material assembling section; Fig. 3 is intermediate plate and steel tape force analysis figure; Fig. 4 is the steel tape schematic diagram; Fig. 5 is the intermediate plate schematic diagram; Among the figure, 1, afterburning screw rod; 2, fastening nut; 3, anchor block; 4, steel tape; 5, intermediate plate; 6, FRP lath; 7, stopper slot; 8, intermediate plate and FRP contact surface; 9, the contact surface of steel tape and intermediate plate; 10, the contact surface of intermediate plate and anchor block; 11, anchor block is domatic; 12, anchor block hole.
The specific embodiment
Shown in Fig. 1-2, active anchor clamp for fiber reinforced plastic sheet material, it comprises anchor block 3 and the intermediate plate 5 that is arranged in the anchor block 3, described anchor block 3 has the integral body of a through hole in being, upper clip and lower clamping piece that described intermediate plate 5 is made up of two-piece type wedge up and down, it is characterized in that in anchor block 3 intermediate plate 5 above be provided with the steel tape 4 that slides up and down, the end face of described steel tape 4 is planes adaptive with anchor block 3, the bottom surface of steel tape 4 is inclined-planes adaptive with the upper clip end face, behind the clamped fibers reinforced plastic sheet material and the wedge shape through hole tight fit that forms between anchor block 3 and the steel tape 4, pass anchor block 3 on the top of steel tape 4 and be provided with afterburning screw rod 1 in the intermediate plate 5 wedging anchor blocks 3.The gradient unanimity of last lower clamping piece, its angle θ all is not more than 5.7 °, and correspondingly inclined-plane and intermediate plate is suitable on steel tape and the anchor block, and smooth surface and scribble lubricant grease.Steel tape 4 upper surfaces are provided with the stopper slot 7 that inserts for afterburning screw rod 1, and the clamping face between the last lower clamping piece is done blasting treatment; The afterburning screw rod 1 on steel tape 4 tops is provided with fastening nut 2.
The design of bolt size:
The coefficientoffriction of intermediate plate and FRP lath gets 0.3, and FRP lath tensile strength f gets 2500MPa, and sectional area A gets 1.4 * 10mm, then the tensile force f of FRP lath:
F＝f·A＝2500×1.4×10＝35000N＝35kN
Required steel tape pressure N is:
μ·N＝F
So: N=F/ μ=35/0.3=117kN
This pressure is born jointly by two screw rods, and gets safety factor 3.0, and the power that then every screw rod is born is 175kN.The yield strength σ of 45Mn steel is 355MPa, selects M10 bolt path d for use
1Be 8.4mm, its bearing capacity T is:
So the present invention selects M10 bolt, nut and screw rod for use." active anchor clamp for fiber reinforced plastic sheet material " is when concrete structure adopts fiber reinforced plastic sheet (FRP) to reinforce in engineering structures strengthening reconstruction project, is used for the permanent and anchoring temporarily of FRP end.
Afterburning screw rod 1 one ends are hexagonal cylinder head end in the afterburning screw rod, adopt the specification of M10 among " interior hexagonal socket cap " GB/T70.1-2000, socket cap total length 10mm; The other end is afterburning screw rod common screw end, adopts D10 among " regular screw threads basic size " GB/T 196-2003, the specification of P=1.5, screw rod total length 20mm.Jam-packed steel tape, intermediate plate and FRP sheet material when afterburning screw acting is anchoring are eliminated the value a that contracts in anchor deformation and the FRP sheet material; As the need removing anchorage device, then unclamp afterburning screw rod, steel tape, intermediate plate and FRP sheet material gap are increased, can remove this ground tackle easily.
Fastening nut 2 adopts the specification of M10 among " hex nut " GB/T 41-2000, and its effect is after afterburning screw rod 1 is tightened, to tighten fastening nut 2 again, can avoid afterburning screw rod 1 and intermediate plate 5 loosening, has increased the reliability of anchor clamp; Before the removing anchorage device, unclamp fastening nut 2 earlier, then can unclamp afterburning screw rod 1 easily.
As shown in Figure 4, steel tape 4 is the hexahedron of 50mm * 14mm * (5.5～7) mm, and wherein the contact surface 9 of steel tape 4 and intermediate plate 5 has the gradient of θ≤5.7 °, this slide plane smooth surface, and scribble lubricant grease; Steel tape 4 is a stopper slot 7 with the contact surface of afterburning screw rod 1.The effect of steel tape 4 is distances of adjusting 5 of intermediate plates under the effect of afterburning screw rod 1: jam-packed intermediate plate 5 during anchoring, and when the FRP lath was stressed, intermediate plate 5 contracted in no longer, has reduced because the stress loss that contracts and cause in the intermediate plate 5; When removing anchor clamp, unclamp intermediate plate 5, can extract the FRP lath easily out.The effect of stopper slot 7 is after afterburning screw rod 1 is tightened, and afterburning screw rod 1 end is stretched in the stopper slot 7, can limit steel tape 5 perpendicular to moving on afterburning screw rod 1 axis direction.
As shown in Figure 5, intermediate plate 5 is the hexahedron of 50mm * 14mm * (3～4.5) mm, and wherein the contact surface 9 of intermediate plate and steel tape has the gradient of θ≤5.7 °, this slide plane smooth surface, and be coated with lubricant grease, to reduce the frictional force of intermediate plate 5 slippages; The contact surface 8 of intermediate plate and FRP lath is the plane, does blasting treatment, to increase the frictional force of intermediate plate 5 and FRP lath.
Anchor block 3 is the cuboid of 50mm * 30mm * 30mm, in a through hole is arranged, the hole is of a size of 50mm * 15mm * (15～16.5) mm, its anchor block domatic 11 contacts with the intermediate plate slide plane, smooth surface, and scribble lubricant grease.Establish two anchor block holes 12 on the anchor block 3 on the opposite of anchor block domatic 11, the hole inwall has screw thread, and the screw thread specification is identical with M10 nut inner thread among " hex nut " GB/T 41-2000.The effect of anchor block 3 is for intermediate plate 5 provides normal pressure, to realize the clamping to the FRP lath.
The present invention has fastening nut 2, can eliminate the loosening phenomenon of machinery of screw rod.Afterburning screw rod 1, can be remedied by the relative slippage that intermediate plate 5 produces if any stress relaxation phenomenon at high-stress state, and the anchored force of anchor clamp is reduced.
The basic performance tests of anchor clamp
1 static load anchoring property
1.1 adopt testing machine that FRP is directly carried out tension test, result of the test is as follows:
FRP lath actual measurement ultimate tension F
Apu
| The test specimen numbering | Sectional dimension (mm * mm) | Ultimate tension (kN) |
| 1? | 1.2×10? | 31.8? |
| 2? | 1.2×10? | 32.4? |
| 3? | 1.2×10? | 34.2? |
| 4? | 1.2×10? | 33.0? |
| 5? | 1.2×10? | 33.0? |
| Average | /? | 32.9? |
After the FRP lath adopts this anchor clamp to carry out anchoring, adopt testing machine clamping anchor clamp, thereby obtain FRP lath-anchor clamp actual measurement ultimate tension F
Pm, carry out respectively in two kinds of situation during mensuration.
1.2 when not adopting afterburning screw rod and steel tape:
| The test specimen numbering | Sectional dimension (mm * mm) | Ultimate tension (kN) |
| 1? | 1.2×10? | 32.2? |
| 2? | 1.2×10? | 31.9? |
| 3? | 1.2×10? | 32.5? |
| 4? | 1.2×10? | 31.4? |
| 5? | 1.2×10? | 32.4? |
| Average | /? | 32.1? |
1.3 when adopting afterburning screw rod and steel tape:
| The test specimen numbering | Sectional dimension (mm * mm) | Ultimate tension (kN) |
| 1? | 1.2×10? | 31.8? |
| 2? | 1.2×10? | 32.8? |
| 3? | 1.2×10? | 31.0? |
| 4? | 1.2×10? | 33.0? |
| 5? | 1.2×10? | 33.0? |
| Average | /? | 32.3? |
With reference to use for tendon anchor clamp efficiency factor η
a
This anchor clamp is single anchor, gets η
p=1, when then not adopting steel tape:
When adopting steel tape:
2 anchor clamp intermediate plate neck-ins are measured
This content is that FRP lath tension stress reaches 0.8f
PtkAfter, the neck-in of FRP lath in the mensuration anchoring process.Establish dial gage at the top that intermediate plate exposes during detection, the variation that the dial gage then of contracting in the intermediate plate can produce reading, the reading of record dial gage when the lath pulling force is 0kN and 23.5kN calculates neck-in thus.The anchor clamp neck-in is measured and is carried out respectively in two kinds of situation.
2.1 when not adopting afterburning screw rod and steel tape:
2.1 when adopting afterburning screw rod and steel tape:
3 conclusions
3.1 anchor clamp efficiency factor
Adopt afterburning screw rod and steel tape than not adopting this parts, the efficiency factor of anchor clamp improves.When its reason was not establish afterburning screw rod and steel tape, two intermediate plates of anchor clamp all can produce and contract in bigger, because every indexs such as frictional force of two intermediate plates can not be in full accord, its neck-in just can not be identical.The difference of neck-in can make the FRP lath that certain stress concentration phenomenon is arranged in the anchor clamp end, thereby causes the FRP lath to destroy ahead of time.
Adopt after afterburning screw rod and the steel tape, the neck-in of intermediate plate and the difference of neck-in all significantly reduce, and stress is concentrated also and significantly reduced accordingly, and the characteristics that FRP lath tensile strength is high can be brought into play more fully, thereby have improved the efficiency factor of anchor clamp.
3.2 anchor clamp intermediate plate neck-in
Adopt afterburning screw rod and steel tape than not adopting this parts, the neck-in of anchor clamp intermediate plate can reduce significantly.When its reason was not establish afterburning screw rod and steel tape, anchor clamp has only by contracting in the intermediate plate just can make its power that is squeezed, and realizes the clamping action of anchor clamp, does not have clamping action without neck-in.
Adopt after afterburning screw rod and the steel tape, contract in intermediate plate does not need and can push the clamping action of realizing the FRP lath by the active of steel tape, in the later loading process of FRP, the neck-in of intermediate plate is minimum.
Suppose member length l=3m to be reinforced, the elastic modulus E of FRP
s=1.6 * 10
5, when not establishing afterburning screw rod and steel tape, intermediate plate neck-in a
0=2.34mm, when afterburning screw rod and steel tape are set, intermediate plate neck-in a
1=0.18mm, then stress loss is respectively under two kinds of situations:
Do not establish afterburning screw rod and steel tape, totally two anchor clamps:
Afterburning screw rod and steel tape are set, totally two anchor clamps:
After afterburning screw rod and steel tape were set, stress loss was not only when being provided with these parts 8% of stress loss.The setting that this shows afterburning bolt and steel tape is for reducing the intermediate plate neck-in, reducing the huge effect of stress loss.
Using method: the preparation before 1 anchoring.No dirt grease etc. is confirmed in cleaning FRP lath 6 ends;
2 anchorings.The steel backing plate is pushed against concrete surface, the FRP lath is penetrated anchor block 5, the FRP lath is subjected to force direction to be arranged in the less side of anchor block 5 through holes, and makes anchor block 5 push against the steel backing plate.Fill in steel tape 6 and intermediate plate 4, the clamping face of intermediate plate is clamped the FRP lath.Reaffirm that anchor block and steel backing plate, steel backing plate and concrete surface all push against.
With the root of the afterburning screw rod 1 of fastening nut 2 screw-ins, more afterburning screw rod 1 is screwed in the anchor block hole 12, it is tight fastening nut 2 to be threaded to anchor block 5 one sidespins after waiting to screw again, and finishes the anchoring to FRP lath end.
3 dismounting anchor clamps.Adopt proper method to make FRP lath end no longer stressed, unscrew fastening nut 2, unscrew afterburning screw rod 1 again, produce the space between intermediate plate 4, the steel tape 3 at this moment, can take out one by one easily, extract anchor block 5 at last out, the dismounting anchor clamp finishes.
Claims (5)
1. active anchor clamp for fiber reinforced plastic sheet material, it comprises anchor block and the intermediate plate that is arranged in the anchor block, described anchor block has the integral body of a through hole in being, upper clip and lower clamping piece that described intermediate plate is made up of two-piece type wedge up and down, it is characterized in that in anchor block intermediate plate above be provided with the steel tape that slides up and down, the end face of described steel tape is the plane adaptive with anchor block, the bottom surface of steel tape is the inclined-plane adaptive with the upper clip end face, behind the clamped fibers reinforced plastic sheet material and the wedge shape through hole tight fit that forms between anchor block and the steel tape, pass anchor block on the top of steel tape and be provided with afterburning screw rod in the intermediate plate wedging anchor block.
2. active anchor clamp for fiber reinforced plastic sheet material according to claim 1, the gradient that it is characterized in that upper clip and lower clamping piece is consistent, its angle θ all is not more than 5.7 °, and correspondingly inclined-plane and intermediate plate is suitable on steel tape and the anchor block, and smooth surface and scribble lubricant grease.
3. active anchor clamp for fiber reinforced plastic sheet material according to claim 1 is characterized in that the steel tape upper surface is provided with the stopper slot that inserts for afterburning screw rod.
4. active anchor clamp for fiber reinforced plastic sheet material according to claim 1 is characterized in that the afterburning screw rod on steel tape top is provided with fastening nut.
5. active anchor clamp for fiber reinforced plastic sheet material according to claim 1 is characterized in that the clamping face between upper clip and the lower clamping piece is done blasting treatment.
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|---|---|---|---|
| CN 201010107985 CN101929221A (en) | 2010-02-10 | 2010-02-10 | Active anchor clamp for fiber reinforced plastic sheet material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010107985 CN101929221A (en) | 2010-02-10 | 2010-02-10 | Active anchor clamp for fiber reinforced plastic sheet material |
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Cited By (12)
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| CN102304958A (en) * | 2011-09-05 | 2012-01-04 | 长沙理工大学 | Prestressing fixture for embedding fiberboard strip for reinforcing concrete structure on surface layer |
| CN102425311A (en) * | 2011-09-05 | 2012-04-25 | 长沙理工大学 | Concrete structure reinforcing method based on near surface mounted prestressed FRP (Fiber Reinforced Polymer) |
| CN103512799A (en) * | 2013-10-22 | 2014-01-15 | 葛洲坝集团试验检测有限公司 | Flexible holding device for concrete tensile test |
| CN104631851A (en) * | 2014-12-26 | 2015-05-20 | 柳州欧维姆机械股份有限公司 | Prestressed carbon fiber plate tensioning device and method for tensioning prestressed carbon fiber plate |
| CN103837383B (en) * | 2014-01-14 | 2016-03-23 | 华北水利水电大学 | Pre-stressed carbon fiber sheet material dual-flat plate ground tackle anchoring property test method |
| CN105544870A (en) * | 2015-12-11 | 2016-05-04 | 哈尔滨工业大学 | Prestressed carbon fiber-reinforced plastic plate anchorage device and manufacturing method thereof |
| WO2016207372A1 (en) * | 2015-06-26 | 2016-12-29 | Danmarks Tekniske Universitet | Anchorage device |
| CN108360822A (en) * | 2018-03-19 | 2018-08-03 | 山东省建筑科学研究院 | A kind of stress mornitoring and tensioning clamping device |
| CN108824230A (en) * | 2018-08-28 | 2018-11-16 | 南京林业大学 | A kind of method of FRP pipe reinforcement bridge underwater foundation |
| CN109914592A (en) * | 2019-04-16 | 2019-06-21 | 沙洲职业工学院 | A kind of three dimension prestressing assembled Fast Installation beam-column node structure and construction method |
| CN112881163A (en) * | 2021-01-26 | 2021-06-01 | 郑州大学 | FRP (fiber reinforced plastic) rod end anchoring and fixing device with telescopic butterfly-shaped clamp and method |
| CN115478707A (en) * | 2022-09-30 | 2022-12-16 | 中国人民解放军陆军工程大学 | High-bearing extrusion type anchorage device suitable for multi-layer carbon fiber plate cable and using method thereof |
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| CN102425311A (en) * | 2011-09-05 | 2012-04-25 | 长沙理工大学 | Concrete structure reinforcing method based on near surface mounted prestressed FRP (Fiber Reinforced Polymer) |
| 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) |
| CN102304958A (en) * | 2011-09-05 | 2012-01-04 | 长沙理工大学 | Prestressing fixture for embedding fiberboard strip for reinforcing concrete structure on surface layer |
| CN103512799A (en) * | 2013-10-22 | 2014-01-15 | 葛洲坝集团试验检测有限公司 | Flexible holding device for concrete tensile test |
| CN103837383B (en) * | 2014-01-14 | 2016-03-23 | 华北水利水电大学 | Pre-stressed carbon fiber sheet material dual-flat plate ground tackle anchoring property test method |
| CN104631851B (en) * | 2014-12-26 | 2016-09-14 | 柳州欧维姆机械股份有限公司 | A kind of pre-stressed carbon fiber plate tensioning equipment and the method for pre-stressed carbon fiber plate stretch-draw thereof |
| CN104631851A (en) * | 2014-12-26 | 2015-05-20 | 柳州欧维姆机械股份有限公司 | Prestressed carbon fiber plate tensioning device and method for tensioning prestressed carbon fiber plate |
| WO2016207372A1 (en) * | 2015-06-26 | 2016-12-29 | Danmarks Tekniske Universitet | Anchorage device |
| US10323427B2 (en) | 2015-06-26 | 2019-06-18 | Danmarks Tekniske Universitet | Anchorage device |
| CN105544870A (en) * | 2015-12-11 | 2016-05-04 | 哈尔滨工业大学 | Prestressed carbon fiber-reinforced plastic plate anchorage device and manufacturing method thereof |
| CN105544870B (en) * | 2015-12-11 | 2017-11-14 | 哈尔滨工业大学 | Anchorage of pre-stressed carbon fiber reinforced plastics sheet material and preparation method thereof |
| CN108360822A (en) * | 2018-03-19 | 2018-08-03 | 山东省建筑科学研究院 | A kind of stress mornitoring and tensioning clamping device |
| CN108824230A (en) * | 2018-08-28 | 2018-11-16 | 南京林业大学 | A kind of method of FRP pipe reinforcement bridge underwater foundation |
| CN108824230B (en) * | 2018-08-28 | 2023-10-27 | 南京林业大学 | Method for reinforcing underwater bridge pier by FRP pipe |
| CN109914592A (en) * | 2019-04-16 | 2019-06-21 | 沙洲职业工学院 | A kind of three dimension prestressing assembled Fast Installation beam-column node structure and construction method |
| CN109914592B (en) * | 2019-04-16 | 2023-12-01 | 沙洲职业工学院 | Three-dimensional prestress assembly type rapid beam column installation node structure and construction method |
| CN112881163A (en) * | 2021-01-26 | 2021-06-01 | 郑州大学 | FRP (fiber reinforced plastic) rod end anchoring and fixing device with telescopic butterfly-shaped clamp and method |
| CN115478707A (en) * | 2022-09-30 | 2022-12-16 | 中国人民解放军陆军工程大学 | High-bearing extrusion type anchorage device suitable for multi-layer carbon fiber plate cable and using method thereof |
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Application publication date: 20101229 |