CN108843040A - The clipping anchorage of carbon fiber board negative camber - Google Patents
The clipping anchorage of carbon fiber board negative camber Download PDFInfo
- Publication number
- CN108843040A CN108843040A CN201810653356.3A CN201810653356A CN108843040A CN 108843040 A CN108843040 A CN 108843040A CN 201810653356 A CN201810653356 A CN 201810653356A CN 108843040 A CN108843040 A CN 108843040A
- Authority
- CN
- China
- Prior art keywords
- carbon fiber
- fiber board
- clamp plate
- negative camber
- anchorage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
- E04G2023/0262—Devices specifically adapted for anchoring the fiber reinforced plastic elements, e.g. to avoid peeling off
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Moulding By Coating Moulds (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The present invention relates to a kind of clipping anchorages of carbon fiber board negative camber, including upper clamp plate and lower clamp plate, are bolted to connection between the upper clamp plate and the lower clamp plate；The upper clamp plate and the opposite face of the lower clamp plate are negative camber shape, form through-hole between the negative camber of the upper clamp plate and the negative camber of the lower clamp plate, clamp carbon fiber board in the through-hole；The height of the through-hole is gradually increased to its both ends along longitudinal direction from middle position, and the height for increasing to through-hole end is identical as the thickness of clamped carbon fiber board.The clipping anchorage of carbon fiber board negative camber of the invention, can be avoided carbon fiber board by excessive shear stress；Stress relaxation can be effectively solved, carbon fiber board is in always and stablizes lasting good stress；When anchor system carrying is larger, multiple anchorages can be used in series to share the pulling force that carbon fiber board is subject to；The anchor device structure is simple, production and easy for construction, practical.
Description
Technical field
The invention belongs to technical field of civil engineering, and in particular to a kind of clipping anchorage of carbon fiber board negative camber.
Background technique
Carbon fiber board has outstanding advantages of tensile strength is high, from heavy and light, corrosion-resistant and underrelaxation, may replace for reinforcing
The traditional material of reinforced beam, such as steel plate, steel wire and armored concrete.Using Tests of Reinforced Concrete Beams Strengthened With Cfrp-laminate
When, carbon fiber board is usually anchored to and is fixed on the end positions of soffit.
Currently, common carbon beaverboard anchorage has strand tapered anchorage and clamping plate type anchorage, the anchorage of both types is all deposited
In following defect：（1）The height that clamping plate is formed by through-hole is constant along longitudinal direction, although the extruding force of anchorage zone is larger,
The extruding force at load-bearing end sports zero, keeps the transverse shear stresses of load-bearing end section very big, so as to cause stress concentration, carbon fiber
Dimension plate is easy to be cut up, or even disconnects；（2）Although existing clamping plate type anchorage can adjust anchoring by adjusting bolt power
The extruding force in area is distributed so that carbon fiber board reasonable stress, but is difficult to control the variation of bolt power in actual operation；（3）Anchor
The Stress relaxation of tool is difficult to solve, although clamping plate type anchor have inner conical hole, theoretically can be by intermediate plate including
Sliding is realized self-locking in the hole of taper, but is proved by a large number of experiments：After stress relaxation, often carbon fiber board and intermediate plate are straight
Slippage is connect, and intermediate plate and internal tapered hole do not slide, so actually cannot achieve self-locking；（4）When carbon fiber board anchors
When system is used for reinforcement, if the load that is subject to of beam is larger or the span of beam is larger, the pulling force that carbon fiber board is subject to also compared with
Greatly, the fixed anchorage in both ends for only leaning against beam is difficult to carry, and needs to arrange multiple anchorages in the bottom of beam at this time, by these anchors
Tool is together in series using to share pulling force, and existing anchorage is seldom able to achieve concatenation function, even if some may be implemented, still
Since existing anchor device structure inherently has that shearing force is excessive, so how many a anchorages of no matter connecting, are all easy to lead
Carbon fiber board is caused to be cut.
The above unfavorable factor causes the anchoring property of existing some anchorages poor, although there are also some anchorage anchoring properties
Preferably, but structure is complicated, brings inconvenience to production and assembling, therefore is badly in need of developing that a kind of structure is simple, anchoring property
Anchorage good and convenient for production and assembling.
Summary of the invention
To solve problems of the prior art, the present invention provides a kind of clipping anchorage of carbon fiber board negative camber, packet
Upper clamp plate and lower clamp plate are included, is bolted to connection between the upper clamp plate and the lower clamp plate；The upper clamp plate and described
The opposite face of lower clamp plate is negative camber shape, is formed between the negative camber of the upper clamp plate and the negative camber of the lower clamp plate logical
Hole, the through-hole is interior to clamp carbon fiber board；The height of the through-hole is gradually increased to its both ends along longitudinal direction from middle position, is increased
Height to through-hole end is identical as the thickness of clamped carbon fiber board.
Preferably, negative camber clamp area is arranged in the intermediate region of the upper clamp plate and the lower clamp plate along longitudinal direction；It is described
Bolt fixed area is arranged in the two sides border region of upper clamp plate and the lower clamp plate along longitudinal direction.
In any of the above-described scheme preferably, the negative camber clamp area of the upper clamp plate and the negative camber of the lower clamp plate
Negative camber is respectively set in clamp area.
In any of the above-described scheme preferably, the intersection of the vertical vertical section of the negative camber and anchorage of the upper clamp plate is
Circular arc line, the circular arc line are determined that three points are point and the circular arc line both ends position in the circular arc line middle position by three points
The point set.Specifically, crosspoint and the circular arc line and upper folder of three points for the circular arc line and upper clamp plate negative camber middle position
The crosspoint of plate negative camber end positions.
In any of the above-described scheme preferably, the intersection of the vertical vertical section of the negative camber and anchorage of the lower clamp plate is
Circular arc line, the circular arc line are determined that three points are point and the circular arc line both ends position in the circular arc line middle position by three points
The point set.Specifically, crosspoint and the circular arc line and lower folder of three points for the circular arc line and lower clamp plate negative camber middle position
The crosspoint of plate negative camber end positions.
In any of the above-described scheme preferably, several layers carbon fiber board can be clamped in the through-hole, and carbon fiber board is total
Thickness is not more than 2cm.One layer of carbon fiber board is at least clamped in through-hole, the thickness of this layer of carbon fiber board is not more than 2cm；If in through-hole
Multilayer carbon fiber board is clamped, then the overall thickness of multilayer carbon fiber board is not more than 2cm.The thickness of carbon fiber board is according to Specific construction feelings
Depending on condition, or depending on the production specification of producer.
In any of the above-described scheme preferably, the length of the upper clamp plate and the lower clamp plate is carbon fiber board overall thickness
50-60 times.
In any of the above-described scheme preferably, the thickness of the end positions of the upper clamp plate and the lower clamp plate along longitudinal direction
For 2-5cm.
In any of the above-described scheme preferably, the thickness of the end positions of the upper clamp plate and the lower clamp plate along longitudinal direction
It is 0.5 times of carbon fiber board width, and in the range of 2-5cm.The width of carbon fiber board depending on Specific construction situation, or
Person depending on the production specification of producer, 0.5 times with a thickness of carbon fiber board width of upper and lower plywoods end positions be it is best,
But it is to ensure that in the range of 2-5cm.
In any of the above-described scheme preferably, the thickness in the middle position of the upper clamp plate and the lower clamp plate along longitudinal direction
And the difference of the thickness of end positions is the 10-15% of carbon fiber board overall thickness.
In any of the above-described scheme preferably, the carbon fiber board in the through hole heart position decrement be 10-
15%。
In any of the above-described scheme preferably, the bolt fixed area of the upper clamp plate and the bolt of the lower clamp plate are fixed
Several bolts hole are arranged in area.
In any of the above-described scheme preferably, the bolt fixed area of the upper clamp plate two sides and the lower clamp plate two sides
Bolt fixed area is opposite respectively, and setting positioning backing plate between opposite upper and lower bolt fixed area.
In any of the above-described scheme preferably, the positioning backing plate is equipped with and the upper clamp plate and the lower clamp plate phase
Corresponding bolt hole.
In any of the above-described scheme preferably, the positioning backing plate is made of steel plate, it is described positioning backing plate thickness and
The overall thickness of the carbon fiber board is identical.
In any of the above-described scheme preferably, the surface of the through-hole carries out coarse processing, such as uses indentation, sandblasting
Method smears epoxide-resin glue after coarse processing again.
The clipping anchorage of carbon fiber board negative camber of the invention, has the advantages that：
（1）Through-hole is formed between the negative camber of upper clamp plate and the negative camber of lower clamp plate, the middle position of through-hole is most narrow, the height of through-hole
Degree is gradually increased to both ends along longitudinal direction from intermediate position, increases to the height of through-hole end and the thickness of clamped carbon fiber board
Spend identical, the extruding force that carbon fiber board is subject in anchorage zone at this time is maximum in the middle position of anchorage zone, while to anchorage zone
Both ends are gradually successively decreased, and at load-bearing end, extruding force levels off to zero；The carbon fiber board institute known to the characteristic distributions of extruding force in anchorage zone
The transverse shearing stress received is maximum in the end of anchorage, while being inwardly gradually kept to zero, although the shear stress phase of load-bearing end section
It is larger to the middle position of anchorage zone, but in the range of carbon fiber board is able to bear, anchorage compared with prior art is being held
The shear stress concentration that portion occurs, the shear stress that the anchorage of the application is generated in end are much smaller；
（2）The thickness for positioning backing plate is identical as the thickness of carbon fiber board, need to only be pressed onto upper and lower plywoods and closely paste with positioning backing plate
Conjunction can form required through-hole, and clamp carbon fiber board with the through-hole, easy to operate, without controlling to adjust the big of bolt power
It is small；If clamping multilayer carbon fiber board in through-hole, the thickness for positioning backing plate is identical as the overall thickness of multilayer carbon fiber board；
（3）Within the scope of free end from the middle position of through-hole to through-hole, carbon fiber board is not only by along upper and lower plywoods inner surface
Frictional force, also by the resistance perpendicular to inner surface, so that carbon fiber board be made to be difficult to generate sliding, this loading characteristic can have
The slippage that effect avoids stress relaxation from generating；Simultaneously within the scope of from the middle position of through-hole to load-bearing end, carbon fiber board institute
The extruding force received can also persistently effectively；Two sections of the front and back collaborative work of through-hole, to guarantee that carbon fiber board is in steadily in the long term
Good stress；
（4）When anchorage reinforced concrete beam clipping using carbon fiber board negative camber of the invention, multiple anchorages can be passed through
Carbon fiber board is together in series and is fixed on the bottom of beams of concrete, shares the super large pulling force that carbon fiber board is subject to this, thus
It avoids the problem that due to the anchorage and concrete Joint failure that pulling force is excessive and generates.
The present invention also provides a kind of methods of pre-stressed carbon fiber plate reinforcement, include following step according to sequencing
Suddenly：
Step 1：Reinforcing is calculated according to the material property of length, carbon fiber board, the size of control stress for prestressing to reinforcement
With the length of carbon fiber board, number material is simultaneously intercepted；
Step 2：Exist according to the design position of stretching end anchor plate, fixing end anchor plate, intermediate anchor plate I, intermediate anchor plate II
Side to reinforcement marks punch position, the punch position marked and stretching end anchor plate, fixing end anchor plate, intermediate anchor
Backing plate I, the hole of expansion bolt on intermediate anchor plate II are corresponding, expansion tube are filled in after drilling, and the encapsulating paste tree in hole
Rouge glue；
Step 3：Before resin glue does not solidify, it is screwed into expansion bolt, by stretching end anchor plate, fixing end anchor plate, intermediate anchor pad
Plate I, intermediate anchor plate II are fixed on design position；
Step 4：Tensioning backing plate is fixed on stretching end anchor plate with tensioning backing plate bolt；
Step 5：One end of carbon fiber board is anchored on the carbon beaverboard anchorage I of stretching end with fishbolt, steel pole is bolted
In on junction steel plate, then junction steel plate is bolted to one end of the carbon beaverboard anchorage I of stretching end；
Step 6：Carbon fiber board is clamped with carbon beaverboard anchorage II, carbon beaverboard anchorage III, carbon beaverboard anchorage IV, keeps pine
Then relaxation state is connected to the bottom surface of fixing end anchor plate, intermediate anchor plate I, intermediate anchor plate II；
Step 7：The tensioning hole that steel pole is passed through to tensioning baffle, then carbon beaverboard anchorage II is clamped, be fixed on fixing end anchor
The bottom surface of backing plate；
Step 8：With jack, symmetrically tensioning steel pole clamps carbon fiber when tension stress reaches the 40% of control stress for prestressing
Beaverboard anchorage III is tieed up, the bottom of intermediate anchor plate I is fixed on；Continue tensioning steel pole, when tension stress reaches control stress for prestressing
When 115%, carbon beaverboard anchorage IV is clamped, the bottom of intermediate anchor plate II is fixed on；Jack is unloaded, when tension stress reaches
When control stress for prestressing, carbon beaverboard anchorage I is fixed on to the bottom of stretching end anchor plate by fixing bolt；In clamping and admittedly
After determining carbon beaverboard anchorage III or carbon beaverboard anchorage IV, if jack occur will reach capacity stroke, thousand are adjusted back in time
Jin top makes its priming stroke zero, is further continued for tensioning；
Step 9：Jack is unloaded, and unloads tensioning backing plate and junction steel plate, the reinforcing to reinforcement can be completed.
In step 4, in tensioning, tensioning backing plate is fixedly connected with tensioning backing plate bolt with stretching end anchor plate, is being opened
After drawing, tensioning backing plate bolt is unloaded, tensioning backing plate is separated with stretching end anchor plate.
In step 8, with jack, symmetrically tensioning steel pole, i.e., all jack simultaneous tensions are inclined to avoid pulling force
The heart.It when unloading jack, cannot all unload, when being unloaded to tension stress and reaching control stress for prestressing, pass through fixing bolt
Carbon beaverboard anchorage I is fixed on to the bottom of stretching end anchor plate.
Preferably, the carbon beaverboard anchorage I, carbon beaverboard anchorage II, carbon beaverboard anchorage III, carbon beaverboard anchorage
IV structure having the same, the structure are any of the above-described kind of clipping anchorage of carbon fiber board negative camber.
The method of pre-stressed carbon fiber plate reinforcement of the invention, has the advantages that：
（1）Several carbon beaverboard anchorages are together in series the equidistant bottom being connected to reinforcement, grading tension carbon is passed through
Fiberboard successively tightens carbon beaverboard anchorage, and each anchorage is made to share a part of pulling force, so as to avoid the anchoring at only both ends
It undertakes pulling force and causes anchor point pulling force excessive, be easy the defect of damage failure, can be used for the reinforcing of long Loads of Long-span Bridges, reliably
Anchor measure keeps prestressing force permanently effective.
（2）Anchor plate is fixed in side with bolt, avoids when beam bottom is fixed, is caused since bottom steel bar stress is intensive
Drill difficult problem；Anchor plate generated moment of flexure under the carbon fiber board pulling force effect of bottom helps to offset external loads pair
The moment of flexure that beam generates, improves prestressing force efficiency.
（3）It is connect by steel pole with stretching end anchorage, tensioning is carried out using jack pair steel pole, if occurring in stretching process
When jack has reached limit travel, when successively clamping and the concatenated any carbon beaverboard anchorage of fixed institute, thousand can be adjusted back
Jin top, makes its priming stroke zero, and tensioning again can avoid jack stroke in this way and not be able to satisfy carbon fiber board tentioning stroke
Problem.
Detailed description of the invention
Fig. 1 is the floor map of a preferred embodiment of the clipping anchorage of carbon fiber board negative camber according to the invention；
Fig. 2 is the A-A diagrammatic cross-section of the embodiment illustrated in fig. 1 of the clipping anchorage of carbon fiber board negative camber according to the invention；
Fig. 3 is the B-B diagrammatic cross-section of the embodiment illustrated in fig. 1 of the clipping anchorage of carbon fiber board negative camber according to the invention；
Fig. 4 is the C-C diagrammatic cross-section of the embodiment illustrated in fig. 1 of the clipping anchorage of carbon fiber board negative camber according to the invention；
Fig. 5 is that beam method is reinforced in the embodiment illustrated in fig. 1 of the clipping anchorage of carbon fiber board negative camber according to the invention
Main view before drawing；
Fig. 6 is that facing upward for beam method is reinforced in the embodiment illustrated in fig. 1 of the clipping anchorage of carbon fiber board negative camber according to the invention
View；
Fig. 7 is that beam method is reinforced in the embodiment illustrated in fig. 1 of the clipping anchorage of carbon fiber board negative camber according to the invention
Main view after drawing；
Fig. 8 is that beam method is reinforced in the embodiment illustrated in fig. 1 of the clipping anchorage of carbon fiber board negative camber according to the invention
Draw the three-view diagram of backing plate；
Fig. 9 is that beam method is reinforced in the embodiment illustrated in fig. 1 of the clipping anchorage of carbon fiber board negative camber according to the invention
The three-view diagram of pull end anchor plate；
Figure 10 is that consolidating for beam method is reinforced in the embodiment illustrated in fig. 1 of the clipping anchorage of carbon fiber board negative camber according to the invention
The three-view diagram of fixed end anchor plate.
Explanation is marked in figure：
1- upper clamp plate, 2- lower clamp plate, 3- bolt, the negative camber of 4- upper clamp plate, the negative camber of 5- lower clamp plate, 6- through-hole, 7- carbon fiber
Tie up plate, 8- negative camber clamp area, 9- bolt fixed area, 10- positioning backing plate；
11-1- stretching end anchor plate, 11-2- fixing end anchor plate, the centre 11-3- anchor plate I, the centre 11-4- anchor plate II,
12- tensioning backing plate, 13-1- carbon beaverboard anchorage I, 13-2- carbon beaverboard anchorage II, 13-3- carbon beaverboard anchorage III, 13-4-
Carbon beaverboard anchorage IV, 14- expansion bolt, 15- tensioning backing plate bolt, 16- bolt hole, 17- fixing bolt, 18- fishbolt,
19- steel pole, 20- tensioning baffle, 21- junction steel plate, 22- jack, 23- wait for reinforcement, 24- carbon fiber board.
Specific embodiment
In order to be further understood that summary of the invention of the invention, the present invention is elaborated below in conjunction with specific embodiment.
Embodiment one：
As shown in Figs 1-4, an embodiment of the clipping anchorage of carbon fiber board negative camber according to the invention, including 1 He of upper clamp plate
Lower clamp plate 2 is fixedly connected between the upper clamp plate 1 and the lower clamp plate 2 by bolt 3；The upper clamp plate 1 and the lower clamp plate
2 opposite faces are negative camber shape, and through-hole 6 is formed between the negative camber 4 of the upper clamp plate and the negative camber 5 of the lower clamp plate,
Carbon fiber board 7 is clamped in the through-hole 6；The height of the through-hole 6 is gradually increased to its both ends along longitudinal direction from middle position, is increased
Height to 6 end of through-hole is identical as the clamped thickness of carbon fiber board 7.
Negative camber clamp area 8 is arranged in the intermediate region of the upper clamp plate 1 and the lower clamp plate 2 along longitudinal direction；The upper clamp plate 1
Bolt fixed area 9 is set with the two sides border region of the lower clamp plate 2 along longitudinal direction.
Negative camber is respectively set in the negative camber clamp area of the upper clamp plate and the negative camber clamp area of the lower clamp plate.It is described
The intersection of the vertical vertical section of the negative camber and anchorage of upper clamp plate is circular arc line, which is determined by three points, three
Point is the point in the circular arc line middle position and the point of the circular arc line end positions；The negative camber of the lower clamp plate and anchorage it is vertical
The intersection of vertical section is circular arc line, which is determined by three points, three points be the circular arc line middle position point with
The point of the circular arc line end positions.
Clamp one layer of carbon fiber board in the through-hole, carbon fiber board with a thickness of 2cm.The upper clamp plate and the lower clamp plate
Length be 50 times of carbon fiber board thickness.The end positions of the upper clamp plate and the lower clamp plate along longitudinal direction with a thickness of 2cm.
The difference of the thickness of the thickness and end positions in the middle position of the upper clamp plate and the lower clamp plate along longitudinal direction is carbon fiber plate thickness
The 10% of degree.The carbon fiber board in the through hole heart position decrement be 10%.
Several bolts hole are arranged in the bolt fixed area of the upper clamp plate and the bolt fixed area of the lower clamp plate.On described
The bolt fixed area of the clamping plate two sides upper and lower bolt opposite respectively and opposite with the bolt fixed area of the lower clamp plate two sides is solid
Determine setting positioning backing plate 10 between area.The positioning backing plate 10 is equipped with corresponding with the upper clamp plate 1 and the lower clamp plate 2
Bolt hole.The positioning backing plate 10 is made of steel plate, the thickness phase of the thickness and the carbon fiber board 7 of the positioning backing plate 10
Together.The surface of the through-hole carries out coarse processing, such as uses the methods of indentation, sandblasting, smears epoxy resin again after coarse processing
Glue.
The clipping anchorage of carbon fiber board negative camber of the present embodiment, has the advantages that：
（1）Through-hole is formed between the negative camber of upper clamp plate and the negative camber of lower clamp plate, the middle position of through-hole is most narrow, the height of through-hole
Degree is gradually increased to both ends along longitudinal direction from intermediate position, increases to the height of through-hole end and the thickness of clamped carbon fiber board
Spend identical, the extruding force that carbon fiber board is subject in anchorage zone at this time is maximum in the middle position of anchorage zone, while to anchorage zone
Both ends are gradually successively decreased, and at load-bearing end, extruding force levels off to zero；The carbon fiber board institute known to the characteristic distributions of extruding force in anchorage zone
The transverse shearing stress received is maximum in the end of anchorage, while being inwardly gradually kept to zero, although the shear stress phase of load-bearing end section
It is larger to the middle position of anchorage zone, but in the range of carbon fiber board is able to bear, anchorage compared with prior art is being held
The shear stress concentration that portion occurs, the shear stress that the anchorage of the application is generated in end are much smaller；
（2）The thickness for positioning backing plate is identical as the thickness of carbon fiber board, need to only be pressed onto upper and lower plywoods and closely paste with positioning backing plate
Conjunction can form required through-hole, and clamp carbon fiber board with the through-hole, easy to operate, without controlling to adjust the big of bolt power
It is small；If clamping multilayer carbon fiber board in through-hole, the thickness for positioning backing plate is identical as the overall thickness of multilayer carbon fiber board；
（3）Within the scope of free end from the middle position of through-hole to through-hole, carbon fiber board is not only by along upper and lower plywoods inner surface
Frictional force, also by the resistance perpendicular to inner surface, so that carbon fiber board be made to be difficult to generate sliding, this loading characteristic can have
The slippage that effect avoids stress relaxation from generating；Simultaneously within the scope of from the middle position of through-hole to load-bearing end, carbon fiber board institute
The extruding force received can also persistently effectively；Two sections of the front and back collaborative work of through-hole, to guarantee that carbon fiber board is in steadily in the long term
Good stress；
（4）When anchorage reinforced concrete beam clipping using carbon fiber board negative camber of the invention, multiple anchorages can be passed through
Carbon fiber board is together in series and is fixed on the bottom of beams of concrete, shares the super large pulling force that carbon fiber board is subject to this, thus
It avoids the problem that due to the anchorage and concrete Joint failure that pulling force is excessive and generates.
As shown in Figure 5-10, an embodiment of the method for pre-stressed carbon fiber plate reinforcement according to the invention, according to
Sequencing includes the following steps：
Step 1：Reinforcing is calculated according to the material property of length, carbon fiber board, the size of control stress for prestressing to reinforcement
With the length of carbon fiber board, number material is simultaneously intercepted；
Step 2：According to stretching end anchor plate 11-1, fixing end anchor plate 11-2, I 11-3 of intermediate anchor plate, intermediate anchor plate II
The design position of 11-4 marks punch position, the punch position marked and stretching end anchor plate in the side to reinforcement 23
11-1, fixing end anchor plate 11-2, intermediate I 11-3 of anchor plate, the hole of expansion bolt 14 on II 11-4 of intermediate anchor plate are opposite
It answers, expansion tube is filled in after drilling, and the encapsulating paste resin glue in hole；
Step 3：Before resin glue does not solidify, it is screwed into expansion bolt 14, by stretching end anchor plate 11-1, fixing end anchor plate 11-
2, I 11-3 of intermediate anchor plate, centre II 11-4 of anchor plate are fixed on design position；
Step 4：Tensioning backing plate 12 is fixed on stretching end anchor plate 11-1 with tensioning backing plate bolt 15；
Step 5：One end of carbon fiber board 24 is anchored on I 13-1 of carbon beaverboard anchorage of stretching end with fishbolt 18, it will
Steel pole 19 is bolted on junction steel plate 21, then junction steel plate 21 is bolted to one end of I 13-1 of carbon beaverboard anchorage of stretching end；
Step 6：Carbon fiber is clamped with II 13-2 of carbon beaverboard anchorage, III 13-3 of carbon beaverboard anchorage, IV 13-4 of carbon beaverboard anchorage
Plate 24 is tieed up, relaxed state is kept, is then connected to fixing end anchor plate 11-2, I 11-3 of intermediate anchor plate, intermediate anchor plate
The bottom surface of II 11-4；
Step 7：Steel pole 19 is passed through to the tensioning hole of tensioning baffle 20, then II 13-2 of carbon beaverboard anchorage is clamped, is fixed on
The bottom surface of fixing end anchor plate 11-2；
Step 8：With jack 22, symmetrically tensioning steel pole 19 is clamped when tension stress reaches the 40% of control stress for prestressing
III 13-3 of carbon beaverboard anchorage is fixed on the bottom of intermediate I 11-3 of anchor plate；Continue tensioning steel pole 19, when tension stress reaches
Control stress for prestressing 115% when, clamp IV 13-4 of carbon beaverboard anchorage, be fixed on the bottom of intermediate II 11-4 of anchor plate；Unloading
I 13-1 of carbon beaverboard anchorage is fixed on when tension stress reaches control stress for prestressing by fixing bolt 17 by jack 22
The bottom of stretching end anchor plate 11-1；After clamping and fixing carbon beaverboard anchorage III or carbon beaverboard anchorage IV, if occurring
Jack will reach capacity stroke, and adjusting back jack in time makes its priming stroke zero, be further continued for tensioning；
Step 9：Jack 22 is unloaded, and unloads tensioning backing plate 12 and junction steel plate 21, adding to reinforcement 23 can be completed
Gu.
In step 4, in tensioning, tensioning backing plate is fixedly connected with tensioning backing plate bolt with stretching end anchor plate, is being opened
After drawing, tensioning backing plate bolt is unloaded, tensioning backing plate is separated with stretching end anchor plate.In step 8, symmetrically with jack
Tensioning steel pole, i.e., all jack simultaneous tensions, to avoid pulling force bias；It when unloading jack, cannot all unload, when unloading
When being downloaded to tension stress and reaching control stress for prestressing, carbon beaverboard anchorage I is fixed on by stretching end anchor plate by fixing bolt
Bottom.Bolt hole 16 is arranged in the bottom of tensioning backing plate 12.The carbon beaverboard anchorage I, carbon beaverboard anchorage II, carbon fiber board
Anchorage III, the structure having the same of carbon beaverboard anchorage IV, the structure are the clipping anchor of carbon fiber board negative camber of the present embodiment
Tool.
The method of the pre-stressed carbon fiber plate reinforcement of the present embodiment is by grading tension carbon fiber board by several carbon
The clipping anchorage of fiberboard negative camber is sequentially connected in series, and is fixed on the anchor plate for wrapping beam bottom, and anchor plate bolt is in beam
Side is fixed, the fixed a set of clipping anchorage of carbon fiber board negative camber in the bottom of each anchor plate.Pass through grading tension carbon fiber
Plate successively tightens carbon beaverboard anchorage, and each anchorage is made to share a part of pulling force, so that the anchoring at only both ends be avoided to undertake drawing
Power and cause anchor point pulling force excessive, be easy damage failure defect, can be used for the reinforcing of long Loads of Long-span Bridges.Anchor plate bolt
It fixes, is avoided when beam bottom is fixed, due to the problem that bottom steel bar stress is intensive and causes drilling difficult in side.Anchor plate exists
Generated moment of flexure helps to offset the moment of flexure that external loads generate beam under the carbon fiber board pulling force effect of bottom, improves pre- answer
Force efficiency.This method is applicable to reinforce long Loads of Long-span Bridges, reliable anchor measure makes prestressing force using prestressing force series connection anchorage
It is permanently effective.
Embodiment two：
Another embodiment of the clipping anchorage of carbon fiber board negative camber according to the invention, the connection between structure, each component
Relationship, working principle, the method for reinforcement, beneficial effect etc. are the same as example 1, unlike：The upper clamp plate and institute
The length for stating lower clamp plate is 55 times of carbon fiber board thickness；The thickness of the end positions of the upper clamp plate and the lower clamp plate along longitudinal direction
Degree is 4cm；The difference of the thickness of the thickness and end positions in the middle position of the upper clamp plate and the lower clamp plate along longitudinal direction is carbon
The 11% of fiberboard thickness；The carbon fiber board in the through hole heart position decrement be 11%.
Embodiment three：
Another embodiment of the clipping anchorage of carbon fiber board negative camber according to the invention, the connection between structure, each component
Relationship, working principle, the method for reinforcement, beneficial effect etc. are the same as example 1, unlike：The upper clamp plate and institute
The length for stating lower clamp plate is 60 times of carbon fiber board thickness；The thickness of the end positions of the upper clamp plate and the lower clamp plate along longitudinal direction
Degree is 5cm；The difference of the thickness of the thickness and end positions in the middle position of the upper clamp plate and the lower clamp plate along longitudinal direction is carbon
The 12% of fiberboard thickness；The carbon fiber board in the through hole heart position decrement be 12%.
Example IV：
Another embodiment of the clipping anchorage of carbon fiber board negative camber according to the invention, the connection between structure, each component
Relationship, working principle, the method for reinforcement, beneficial effect etc. are the same as example 1, unlike：Clamping in the through-hole
Two layers of carbon fiber board, the overall thickness of two layers of carbon fiber board are 2cm.The length of the upper clamp plate and the lower clamp plate is carbon fiber board
50 times of overall thickness；The end positions of the upper clamp plate and the lower clamp plate along longitudinal direction with a thickness of 2cm；The upper clamp plate and institute
The difference for stating the thickness in the middle position of lower clamp plate along longitudinal direction and the thickness of end positions is the 13% of carbon fiber board overall thickness；It is described
Carbon fiber board in the through hole heart position decrement be 13%.
Embodiment five：
Another embodiment of the clipping anchorage of carbon fiber board negative camber according to the invention, the connection between structure, each component
Relationship, working principle, the method for reinforcement, beneficial effect etc. are identical as example IV, unlike：Clamping in the through-hole
Three layers of carbon fiber board, the overall thickness of three layers of carbon fiber board are 2cm.The length of the upper clamp plate and the lower clamp plate is carbon fiber board
55 times of overall thickness；The end positions of the upper clamp plate and the lower clamp plate along longitudinal direction with a thickness of 3.5cm；The upper clamp plate and
The difference of the thickness of the thickness and end positions in the middle position of the lower clamp plate along longitudinal direction is the 14% of carbon fiber board overall thickness；Institute
State carbon fiber board in the through hole heart position decrement be 14%.
Embodiment six：
Another embodiment of the clipping anchorage of carbon fiber board negative camber according to the invention, the connection between structure, each component
Relationship, working principle, the method for reinforcement, beneficial effect etc. are the same as example 1, unlike：Clamping in the through-hole
Four layers of carbon fiber board, the overall thickness of four layers of carbon fiber board are 2cm.The length of the upper clamp plate and the lower clamp plate is carbon fiber board
60 times of overall thickness；The end positions of the upper clamp plate and the lower clamp plate along longitudinal direction with a thickness of 5cm；The upper clamp plate and institute
The difference for stating the thickness in the middle position of lower clamp plate along longitudinal direction and the thickness of end positions is the 15% of carbon fiber board overall thickness；It is described
Carbon fiber board in the through hole heart position decrement be 15%.
It will be apparent to those skilled in the art that the clipping anchorage of carbon fiber board negative camber of the invention includes aforementioned present invention
Any combination of each section shown by the summary of the invention and specific embodiment part and attached drawing of specification, as space is limited simultaneously
Each scheme to keep specification concise without constituting these combinations describes one by one.It is all the spirit and principles in the present invention it
Any modification, equivalent substitution, improvement and etc. that are interior, being done, should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of clipping anchorage of carbon fiber board negative camber, including upper clamp plate and lower clamp plate, the upper clamp plate and the lower clamp plate
Between be bolted to connection, it is characterised in that：The upper clamp plate and the opposite face of the lower clamp plate are negative camber shape, institute
It states and forms through-hole between the negative camber of upper clamp plate and the negative camber of the lower clamp plate, carbon fiber board is clamped in the through-hole；It is described
The height of through-hole is gradually increased to its both ends along longitudinal direction from middle position, increases to the height and clamped carbon fiber of through-hole end
The thickness for tieing up plate is identical.
2. the clipping anchorage of carbon fiber board negative camber as described in claim 1, it is characterised in that：The upper clamp plate and it is described under
Negative camber clamp area is arranged in the intermediate region of clamping plate along longitudinal direction；The two sides edge area of the upper clamp plate and the lower clamp plate along longitudinal direction
Bolt fixed area is arranged in domain.
3. the clipping anchorage of carbon fiber board negative camber as claimed in claim 2, it is characterised in that：The negative camber of the upper clamp plate
Negative camber is respectively set in clamp area and the negative camber clamp area of the lower clamp plate.
4. the clipping anchorage of carbon fiber board negative camber as claimed in claim 3, it is characterised in that：The negative camber of the upper clamp plate
Intersection with the vertical vertical section of anchorage is circular arc line, which is determined by three points, and three points are in the circular arc line
Between the point of position and the point of the circular arc line end positions.
5. the clipping anchorage of carbon fiber board negative camber as claimed in claim 3, it is characterised in that：The negative camber of the lower clamp plate
Intersection with the vertical vertical section of anchorage is circular arc line, which is determined by three points, and three points are in the circular arc line
Between the point of position and the point of the circular arc line end positions.
6. the clipping anchorage of carbon fiber board negative camber as described in claim 1, it is characterised in that：If can be clamped in the through-hole
Dried layer carbon fiber board, and carbon fiber board overall thickness is not more than 2cm.
7. the clipping anchorage of carbon fiber board negative camber as claimed in claim 6, it is characterised in that：The upper clamp plate and it is described under
The length of clamping plate is 50-60 times of carbon fiber board overall thickness.
8. the clipping anchorage of carbon fiber board negative camber as claimed in claim 7, it is characterised in that：The upper clamp plate and it is described under
The end positions of clamping plate along longitudinal direction with a thickness of 2-5cm.
9. the clipping anchorage of carbon fiber board negative camber as claimed in claim 8, it is characterised in that：The upper clamp plate and it is described under
The difference of the thickness of the thickness and end positions in the middle position of clamping plate along longitudinal direction is the 10-15% of carbon fiber board overall thickness.
10. the clipping anchorage of carbon fiber board negative camber as claimed in claim 9, it is characterised in that：The carbon fiber board is in institute
The decrement for stating through hole center position is 10-15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810653356.3A CN108843040B (en) | 2018-06-22 | 2018-06-22 | Carbon fiber plate inner curved surface clamping type anchorage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810653356.3A CN108843040B (en) | 2018-06-22 | 2018-06-22 | Carbon fiber plate inner curved surface clamping type anchorage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108843040A true CN108843040A (en) | 2018-11-20 |
| CN108843040B CN108843040B (en) | 2020-08-25 |
Family
ID=64203125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810653356.3A Active CN108843040B (en) | 2018-06-22 | 2018-06-22 | Carbon fiber plate inner curved surface clamping type anchorage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108843040B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145072A (en) * | 2019-01-23 | 2019-08-20 | 卡本科技股份有限公司 | A kind of assembled anchorage and operating 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322152A (en) * | 2011-09-29 | 2012-01-18 | 重庆大学 | Prestressed carbon fiber board tensioning system and tension reinforcing method |
| CN103075014A (en) * | 2013-02-06 | 2013-05-01 | 全恩懋 | Tensional anchoring system for secondary clamping of prestressed sheets |
| CN104141363A (en) * | 2014-06-04 | 2014-11-12 | 兰州铁信土建新技术有限公司 | Rear combined clamping type prestress anchor |
| CN205189428U (en) * | 2015-12-11 | 2016-04-27 | 招商局重庆交通科研设计院有限公司 | Push -pull system is opened to bent panel mount carbon fiber plate ground tackle |
| CN105781123A (en) * | 2016-05-06 | 2016-07-20 | 西南交通大学 | Mechanical gripping anchor for carbon fiber plate and reinforcing device |
| CN205421954U (en) * | 2016-03-30 | 2016-08-03 | 陕西通宇新材料有限公司 | Multi coated carbon fiber sheet stretch -draw anchor |
-
2018
- 2018-06-22 CN CN201810653356.3A patent/CN108843040B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322152A (en) * | 2011-09-29 | 2012-01-18 | 重庆大学 | Prestressed carbon fiber board tensioning system and tension reinforcing method |
| CN103075014A (en) * | 2013-02-06 | 2013-05-01 | 全恩懋 | Tensional anchoring system for secondary clamping of prestressed sheets |
| CN104141363A (en) * | 2014-06-04 | 2014-11-12 | 兰州铁信土建新技术有限公司 | Rear combined clamping type prestress anchor |
| CN205189428U (en) * | 2015-12-11 | 2016-04-27 | 招商局重庆交通科研设计院有限公司 | Push -pull system is opened to bent panel mount carbon fiber plate ground tackle |
| CN205421954U (en) * | 2016-03-30 | 2016-08-03 | 陕西通宇新材料有限公司 | Multi coated carbon fiber sheet stretch -draw anchor |
| CN105781123A (en) * | 2016-05-06 | 2016-07-20 | 西南交通大学 | Mechanical gripping anchor for carbon fiber plate and reinforcing device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145072A (en) * | 2019-01-23 | 2019-08-20 | 卡本科技股份有限公司 | A kind of assembled anchorage and operating 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108843040B (en) | 2020-08-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108843039A (en) | The method of pre-stressed carbon fiber plate reinforcement | |
| Mostofinejad et al. | 3D beam–column corner joints retrofitted with X-shaped FRP sheets attached via the EBROG technique | |
| CN108843037A (en) | A kind of prestressed fiber cloth reinforced girder tensioning anchor and its construction method | |
| CN101583768A (en) | An engineered wood construction system for high performance structures | |
| Khalifa et al. | Shear performance of RC members strengthened with externally bonded FRP wraps | |
| CN108843040A (en) | The clipping anchorage of carbon fiber board negative camber | |
| CN103306214B (en) | The bracing means of a kind of reinforced concrete beam and floor | |
| CN107268891B (en) | Adjustable prestressed laminated wood beam string continuous beam | |
| CN110029594B (en) | Construction method for reinforcing concrete beam by using multiple layers of prestressed fiber cloth | |
| Brunner et al. | Timber beams strengthened by attaching prestressed carbon FRP laminates with a gradiented anchoring device | |
| CN101368374B (en) | Pretensioning method for converting old simply supported beam bridge into continuous bridge | |
| CN109972499A (en) | Middle seamless telescopic structure of small and medium span simply supported highway bridge and construction method | |
| CN110094075A (en) | The reinforcement means of existing reinforced concrete composite structure truss construction dislocation | |
| CN203904854U (en) | Prestress carbon plate anchor | |
| CN105735666B (en) | A kind of method of rapid reinforcement concrete column | |
| CN209293228U (en) | A kind of assembled foundation connecting node | |
| EP1235964B1 (en) | Method for the construction of a prestressed structure and prestressed structure thus obtained | |
| CN104675122B (en) | Unbonded prestressing tendon controllable sectional anchor set and its assembly method and application | |
| CN116591396A (en) | Overhanging clamp type anchorage device for prestressed carbon plate | |
| CN109518803A (en) | A kind of precast concrete beam having high-intensitive connecting node | |
| CN110029593A (en) | A kind of tensioning of the prestressed fiber cloth reinforced beam of multilayer and anchor | |
| Al-Atta et al. | Influence of anchorage systems on externally-bonded CFRP sheets used for flexural strengthening | |
| KR101861551B1 (en) | Seismic Retrofit device of the building which consists of the masonry wall and method thereof | |
| Rizzo et al. | Strengthening concrete structures with mechanically fastened pultruded strips | |
| CN206158015U (en) | Prestressed carbon fiber plate anchor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |