CN209556423U - A kind of FRP outsourcing cracked concrete structure - Google Patents
A kind of FRP outsourcing cracked concrete structure Download PDFInfo
- Publication number
- CN209556423U CN209556423U CN201822210781.3U CN201822210781U CN209556423U CN 209556423 U CN209556423 U CN 209556423U CN 201822210781 U CN201822210781 U CN 201822210781U CN 209556423 U CN209556423 U CN 209556423U
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- China
- Prior art keywords
- frp
- compoboard
- plate material
- frp plate
- concrete
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- 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.)
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- 239000004567 concrete Substances 0.000 title claims abstract description 84
- 238000012946 outsourcing Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 76
- 239000004744 fabric Substances 0.000 claims abstract description 67
- 238000005336 cracking Methods 0.000 claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 5
- 239000011347 resin Substances 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 abstract description 13
- 239000003822 epoxy resin Substances 0.000 abstract description 8
- 229920000647 polyepoxide Polymers 0.000 abstract description 8
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000009429 distress Effects 0.000 abstract description 3
- 230000035882 stress Effects 0.000 description 17
- 230000006835 compression Effects 0.000 description 13
- 238000007906 compression Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 13
- 239000002131 composite material Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- 238000013461 design Methods 0.000 description 7
- 230000002787 reinforcement Effects 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000011120 plywood Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Landscapes
- Working Measures On Existing Buildindgs (AREA)
Abstract
A kind of FRP outsourcing cracked concrete structure, including FRP cloth, FRP plate material compoboard A, FRP plate material compoboard B, FRP plate material compoboard C, the FRP plate material compoboard B is by being affixed on concrete column cracking position outside resin layer, the FRP plate material compoboard A, the FRP plate material compoboard B and the FRP plate material compoboard C tie up the breaking part for being located at concrete column by the FRP cloth, the FRP plate material compoboard A and the FRP plate material compoboard C are bonded with two inclined-planes of FRP plate material compoboard B respectively and are bonded simultaneously with the concrete column surface, pass through outer-enwraped type structure, confined concrete internal volume expands with the displacement of constraint internal part the integral strength for improving concrete, and epoxy resin is solved to a certain extent because toughness is low poor with splitting resistance The adverse effect that the later period cracks again at caused distress in concrete.
Description
Technical field
The utility model belongs to building mixed mud reinforcement technique field, and in particular to a kind of FRP outsourcing cracked concrete knot
Structure.
Background technique
In the prior art, fibre reinforced composites (FRP) reinforced concrete structure technology is that FRP is fixed on coagulation
Soil structure surface forms composite bodies and is reached by the synergistic effect of fibre reinforced composites and concrete structure to original
Structural strengthening and repairing and the purpose for improving structure tension performance.When concrete compression increases, FRP cloth is influenced to generate by adhesive surface
The hysteresis quality of stress, and according to plane cross-section assumption, compressive region concrete reaches capacity when straining, and fiber cloth only plays 20% or so
Intensity.Although aqueous epoxy resins mending concrete can restore the original intensity for even improving concrete column in a short time,
But the epoxy resin after solidifying is easy to crack, easily peelable, this can reduce the durability of concrete column after repairing to a certain extent.
Particularly, for general FRP cloth prestressed reinforcement concrete column to can not big face due to higher to prestressing force size requirements
Product is used.
Utility model content
(1) the technical issues of solving
The purpose of this utility model is to provide a kind of FRP outsourcing cracked concrete structures, to solve above-mentioned background technique
The practical problem of middle proposition.
(2) technical solution
To achieve the above object, the utility model provides the following technical solutions: a kind of FRP outsourcing cracked concrete structure,
Including FRP cloth, FRP plate material compoboard A, FRP plate material compoboard B, FRP plate material compoboard C, the FRP plate material compoboard B by
Concrete column cracking position, the FRP plate material compoboard A, the FRP plate material compoboard B and the FRP plate are affixed on outside resin layer
Material compoboard C ties up the breaking part for being located at concrete column, the FRP plate material compoboard A and the FRP plate material by the FRP cloth
Compoboard C is bonded with two inclined-planes of FRP plate material compoboard B respectively and is bonded simultaneously with the concrete column surface.
Preferably, the cross section of the FRP plate material compoboard A is parallelogram.
Preferably, the cross section of the FRP plate material compoboard B is isosceles trapezoid.
Preferably, the cross section of the FRP plate material compoboard C is parallelogram.
Preferably, the FRP cloth is in the FRP plate material compoboard A, the FRP plate material compoboard B and the FRP plate material
Covering density on compoboard C is different.
(3) beneficial effect
The utility model provides a kind of new design structure of FRP outsourcing cracked concrete, using a variety of FRP materials, leads to
The synergistic effect for crossing FRP plate material and FRP cloth promotes offset, and further on the basis of centripetal prestressing force by FRP cloth deformation
Promote centripetal force.Structure design reinforces same crack using three-dimensional stress mode, can effectively solve FRP cloth by viscous
Response lag problem produced by junction transition buffer influences, and the compression strength of FRP plate material is effectively played simultaneously, solve existing skill
Railway Project present in art.Special, required prestressing force size is wanted when the structure is to FRP cloth prestressed reinforcement concrete column
Certain reduction has been asked, and the requirement to tool is effectively reduced.By outer-enwraped type structure, the expansion of confined concrete internal volume with
The displacement of internal part is constrained to improve the integral strength of concrete, and solves epoxy resin to a certain extent because toughness is low
With the adverse effect that the later period cracks again at distress in concrete caused by splitting resistance difference.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model embodiment, make required for being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1: the utility model structure diagram.
Fig. 2: position view after the utility model concrete column deforms after being pressurized.
Fig. 3: the crack of the utility model mixed mud column and the position side structure schematic diagram of FRP compoboard.
Fig. 4: the theoretical bonding state and each section stress condition analysis chart of the utility model FRP compoboard.
FRP plate material compoboard A, FRP plate material compoboard C stress after Fig. 5: the utility model FRP plate material compoboard B sliding
Analyze schematic diagram；
In attached drawing, parts list represented by the reference numerals are as follows:
1- concrete column, 2-FRP cloth, 3-FRP plate compoboard A, 4-FRP plate compoboard B, 5-FRP plate compoboard
C。
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
All other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-5 is please referred to, the utility model provides a kind of technical solution: a kind of FRP outsourcing cracked concrete structure, including
FRP cloth 2, FRP plate material compoboard A3, FRP plate material compoboard B4, FRP plate material compoboard C5, the FRP plate material compoboard A3 are set
It is placed in the top of the FRP plate compoboard B4, the FRP plate material compoboard C5, the FRP plate material compoboard B is by resin layer
It is affixed on concrete column cracking position, the FRP plate material compoboard A3, the FRP plate material compoboard B4 and the FRP plate material group outside
Plywood C5 ties up the breaking part for being located at concrete column 1, the FRP plate material compoboard A3 and the FRP plate by the FRP cloth 2
Material compoboard C5 is bonded with two inclined-planes of FRP plate material compoboard B4 respectively and is bonded simultaneously with 1 surface of concrete column；It is described
The cross section of FRP plate material compoboard A3 is parallelogram；The cross section of the FRP plate material compoboard B4 is isosceles trapezoid；Institute
The cross section for stating FRP plate material compoboard C5 is parallelogram；The FRP cloth 2 is in the FRP plate material compoboard A3, the FRP
Covering density on the plate compoboard B4 and FRP plate material compoboard C5 is different.
The utility model, first by outer patch method for strengthening, is beaten concrete column crack and surrounding when specifically used
Use aqueous epoxy resins to fill up distress in concrete as structure glue after mill processing, then adds epoxy coating for FRP plate material
Compoboard is pasted on the impaired side of concrete square column, cracks to concrete square column and partially carries out strengthening with external bonding, finally uses ring
FRP cloth 2 is constrained the progress secondary structure reinforcing of FRP plate material fracture and is directly reinforced to concrete square column, In by oxygen resin
The FRP plate material outside 2 confined concrete of FRP cloth is used using the circumferential Bao Zhufa at density interval by prestressing.
Through the improvement to FRP cloth circumferential direction packet column mode, in the case where the promotion concrete column intensity effect of FRP cloth 2 is as constant as possible
Certain slip amount is provided, method is that the FRP cloth of composite structure two sides is closeer and the FRP cloth in the middle part of composite structure is relatively dredged,
And generally parallel restraining.That is the FRP cloth of outside concrete parts is the closest, at followed by FRP plate A3 and FRP plate C5
FRP cloth, FRP cloth at FRP plate B4 almost without lap but also tight part, passes through cooperateing between FRP plate and FRP cloth
Effect, FRP plate direct reinforced concrete cracking part under the action of epoxy resin, under the action of epoxy resin and FRP cloth
Fracture carries out secondary structure reinforcing, is directly reinforced while reinforcing FRP plate to soil solidifying on the outside of FRP plate, due to FRP group
Plywood immediate constraint plays main function to the reinforcing of concrete, reduces FRP tilt angle as far as possible in compressive ultimate strength,
Its binding effect can effectively be enhanced.FRP plate vertical direction short side is identical as the length of FRP plate A3, FRP plate C5 vertical direction side.
When the compression strength of design FRP plate is 1000MPa, by can be calculated between FRP plate theory inclination alpha and FRP cloth prestressing force F
Best relation, obtain equation:
Obviously
σ1> σ2
Therefore
[σ] > σ1> σ2
In formula: F --- pressure of the FRP cloth to FRP plate, N
The tilt angle of α --- FRP plate, °
II plate bond length of b --- FRP, m
L --- the thickness of FRP compoboard, m
D --- the width of FRP compoboard, concrete square column width, m
Under corresponding design conditions, will there is the theoretical work performance of the design composite structure with durability under the theoretical equation
More excellent solution.The synergistic effect of the displacement of amplification FRP plate material and FRP cloth simultaneously increases centripetal force by the deformation of FRP cloth, three-dimensional constraint
And same crack is reinforced to improve the mechanics principle of FRP timber intensity:
Such as Fig. 1, when concrete test block is not pressurized, by FRP cloth, circumferentially heart pressure stress F is uniformly distributed FRP plate,
FRP plate itself is reinforced situation to concrete surface and is also relatively dispersed, by prestressing, using the circumferential Bao Zhu at density interval
Method is mentioned by the improvement to FRP cloth circumferential direction packet column mode in FRP cloth using the FRP plate material outside FRP cloth confined concrete
Rise concrete column intensity effect it is as constant as possible in the case where certain slip amount is provided, method is composite structure two sides
FRP cloth 2 is closeer and the FRP cloth 2 in the middle part of composite structure is relatively dredged, and generally parallel restraining.That is the FRP of outside concrete parts
Cloth is the closest, the FRP cloth at followed by FRP plate A3 and FRP plate C5, the FRP cloth at FRP plate B4 almost without lap but
Tight part.
Such as Fig. 2, in compression, the presence in concrete test block crack will lead to FRP plate A3 and correspond to concrete test block
Part concrete slides downwards with FRP plate A3, and FRP plate A3 and FRP plate C5 occur to squeeze to stress concentration position, that is, FRP plate B4
There is further constraint at position.The slippage of FRP plate A3 will cause the deformation of FRP cloth to bigger tensile stress simultaneously, and at
For circumferential compression.
Such as Fig. 2, under further compression effect, micro outside expansion will occur for concrete at crack, and pass through FRP
Plate B4 is conducted to FRP cloth.In the process, other than outer patch method FRP plate has the inhibition pulled to the crack of concrete,
The deformation of FRP plate B4 effectively amplifies the crack deformation of concrete, and acts in FRP cloth.When FRP cloth reaches in prestressing force
In the case where 200Mpa (common prestressing force package), the more simple FRP of the theoretical strength of code test test block integral working
Cloth circumferential direction package has a distinct increment.In above process, further deformation is generated bigger tensile stress to concrete by FRP cloth 2
Test block and FRP plate composite structure generate effective effect of contraction, this plays the big advantage of FRP cloth tensile strength for better.When
When application prestress strength is further promoted, the working performance of the composite structure be will further enhance.If adding only with FRP cloth
Gu being more biased towards the reinforcing effect of concrete column for biaxial stress reinforcement.After using FRP compoboard auxiliary, to concrete column
Reinforcing effect become three-dimensional stress reinforcement.Three-dimensional stress is higher than two to answering to the promotion effect of concrete column axial compression strength
Power is to the promotion effect of concrete column axial compression strength, since the crack of concrete test block causes FRP plate A3 to correspond to concrete
The part concrete of test block slides downwards with plate A3, and FRP plate A3 and FRP plate C5 squeezes FRP plate B4, coagulation at crack
Micro outside expansion will occur for soil, and FRP plate B4 is caused to arch upward and conduct outward to FRP cloth 2, cause the deformation of FRP cloth 2 to
Bigger tensile stress, and become circumferential compression.In the process, in addition to crack of the outer patch method FRP plate to concrete has one
Outside the inhibition pulled to, the deformation of FRP plate B4 effectively amplifies the crack deformation of concrete, and acts in FRP cloth 2.Work as FRP cloth
2 in the case where prestressing force reaches 200Mpa (common prestressing force package), and the theory of code test test block integral working is strong
More simple FRP cloth circumferential direction package is spent to have a distinct increment.In above process, FRP cloth 2 generates further deformation bigger
Tensile stress generates effective effect of contraction to concrete test block and FRP plate compoboard, this will preferably play FRP cloth tensile strength
Big advantage.When application prestress strength is further promoted, the working performance of the composite structure be will further enhance.
Such as Fig. 3, by force analysis, FRP plate A3 and FRP plate C5 will generate a torque in the increased situation of load,
Although reducing the restriction ability of fracture surrounding concrete to a certain extent, the deformation of FRP cloth 2 is will be further increased in this,
Bigger tensile stress is generated at the concrete i.e. crack of concrete to make the corresponding position FRP plate B4；
As shown in figure 5, FRP plate A3 and FRP plate C5 will generate a torsion in the increased situation of load by force analysis
Square, although reducing the restriction ability of fracture surrounding concrete to a certain extent, the shape of FRP cloth is will be further increased in this
Become, to make to generate bigger tensile stress at the concrete i.e. crack of concrete of the corresponding position FRP plate B4.
By tentatively judging, when pre-stress FRP cloth is under the action of prestressing force F, no more than the feelings of FRP cloth tensile strength
Under condition, no more than the compression strength of FRP plate.Assuming that binding effect phase of each position FRP plate A3 and FRP plate C5 by FRP cloth
Together.
Under conditions of above:
F'=0
2bsin3α-2Lcos3α-L=0
It solves
In formula:
The compression of σ --- FRP plate, II long side length of N a --- FRP plate, m
FN--- the sum of the compression of vertical direction that plate II is subject to, N
Cross-sectional area of A --- the plate II close to cracking part side, m2
According to relation formula obtained as above, the FRP group of reasonable length can be selected according to the flaw size on concrete column
Plywood length, and integration is designed to the parameters of FRP plate material compoboard, ensure the structure in the steady of reinforcement of concrete post
It is qualitative and avoid to a certain extent in vain reinforce increase economic efficiency.
The utility model provides a kind of new design structure of FRP outsourcing cracked concrete, using a variety of FRP materials, leads to
The synergistic effect for crossing FRP plate material and FRP cloth promotes offset, and further on the basis of centripetal prestressing force by FRP cloth deformation
Promote centripetal force.Structure design reinforces same crack using three-dimensional stress mode, can effectively solve FRP cloth by viscous
Response lag problem produced by junction transition buffer influences, and the compression strength of FRP plate material is effectively played simultaneously, solve existing skill
Railway Project present in art.Special, structure requirement prestressed to FRP cloth has certain reduction, and is effectively reduced to work
The requirement of tool.By outer-enwraped type structure, expanding with the displacement of constraint internal part for confined concrete internal volume is improved
The integral strength of concrete, and epoxy resin is solved to a certain extent because of the low coagulation soil cracking caused by difference with splitting resistance of toughness
The adverse effect that the later period cracks again at seam.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one of the utility model
In embodiment or example.In the present specification, schematic expression of the above terms be not necessarily referring to identical embodiment or
Example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more embodiment or examples
In can be combined in any suitable manner.
The preferred embodiment in the utility model disclosed above is only intended to help to illustrate the utility model.Preferred embodiment is simultaneously
There is no the details that detailed descriptionthe is all, also not limiting the utility model is only the specific embodiment.Obviously, according to this theory
The content of bright book can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to preferably
The principles of the present invention and practical application are explained, so that skilled artisan be enable to better understand and utilize this
Utility model.The utility model is limited only by the claims and their full scope and equivalents.
Claims (5)
1. a kind of FRP outsourcing cracked concrete structure, it is characterised in that: including FRP cloth (2), FRP plate material compoboard A(3), FRP
Plate compoboard B(4), FRP plate material compoboard C(5), the FRP plate material compoboard B(4) by being affixed on concrete column outside resin layer
(1) cracking position, the FRP plate material compoboard C(5), the FRP plate material compoboard A(3), the FRP plate material compoboard B(4)
The breaking part for being located at concrete column (1), the FRP plate material are tied up by the FRP cloth (2) with the FRP plate material compoboard C(5)
Compoboard A(3) and the FRP plate material compoboard C(5) be bonded respectively with two inclined-planes of FRP plate material compoboard B(4) and simultaneously with
Concrete column (1) the surface fitting.
2. a kind of FRP outsourcing cracked concrete structure according to claim 1, it is characterised in that: the FRP plate material combination
Plate A(3) cross section be parallelogram.
3. a kind of FRP outsourcing cracked concrete structure according to claim 1, it is characterised in that: the FRP plate material combination
Plate B(4) cross section be isosceles trapezoid.
4. a kind of FRP outsourcing cracked concrete structure according to claim 1, it is characterised in that: the FRP plate material combination
Plate C(5) cross section be parallelogram.
5. a kind of FRP outsourcing cracked concrete structure according to claim 1, it is characterised in that: FRP cloth (2) In
The FRP plate material compoboard A(3), the FRP plate material compoboard B(4) and the FRP plate material compoboard C(5) on covering dredge
Density is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822210781.3U CN209556423U (en) | 2018-12-27 | 2018-12-27 | A kind of FRP outsourcing cracked concrete structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822210781.3U CN209556423U (en) | 2018-12-27 | 2018-12-27 | A kind of FRP outsourcing cracked concrete structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209556423U true CN209556423U (en) | 2019-10-29 |
Family
ID=68304930
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822210781.3U Expired - Fee Related CN209556423U (en) | 2018-12-27 | 2018-12-27 | A kind of FRP outsourcing cracked concrete structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209556423U (en) |
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2018
- 2018-12-27 CN CN201822210781.3U patent/CN209556423U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191029 |