CN109457992A - A kind of external bonding of band anchoring reinforces the method and application of concrete structure - Google Patents
A kind of external bonding of band anchoring reinforces the method and application of concrete structure Download PDFInfo
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- CN109457992A CN109457992A CN201811273437.7A CN201811273437A CN109457992A CN 109457992 A CN109457992 A CN 109457992A CN 201811273437 A CN201811273437 A CN 201811273437A CN 109457992 A CN109457992 A CN 109457992A
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- Prior art keywords
- glue
- hole
- patch
- carbon fiber
- carbon
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Classifications
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- 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
- E04G23/0244—Increasing or restoring the load-bearing capacity of building construction elements of beams at places of holes, e.g. drilled in them
-
- 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
-
- 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
Abstract
The invention discloses methods and application that a kind of external bonding of band anchoring reinforces concrete structure.Aperture is carried out in beam tension side；Prepare carbon fiber patch and carbon fibre bar；Hole is filled with deployed epoxide-resin glue and slot inner surface is spread into epoxy resin；The carbon fiber patch infiltrated is pasted at design position i.e. bottom patch first；Iron wire is bent to U-shaped, the carbon fibre bar made is subjected to doubling at anchoring, fold position is placed at the hole that beam has been accomplished fluently, carbon fibre bar is slowly pressed into hole using iron wire, another side cavities also carry out same operation, it tenses carbon fibre bar in alignment to guarantee, fiber bar is depressed into behind the bottom of hole and slowly extracts iron wire, the carbon fiber patch infiltrated covering is finally pasted at anchoring i.e. top layer patch again；Mounted beam is waited to the solidification of glue.The method of present invention simplicity joined the anchor system being easily installed, and the tensile strength of CFRP is given full play to.
Description
Technical field
The present invention relates to methods and application that a kind of external bonding of band anchoring reinforces concrete structure, belong to construction
Technical field.
Background technique
Carbon fibre material starts from the beauty eighties, Deng developed country, China for the research of concrete structure reinforcement repairing
This technology start late.1997, State Industrial Building Diagnostic and Reform Engineering Technology Research carried out use earliest
The research of CFRP reinforced concrete member, obtains certain research achievement.Hereafter, domestic experts and scholars have carried out a large amount of theoretical point
Analysis and experimental study.
Carbon fibre reinforced composite is due to having obtained building row with high-strength mechanical property and excellent endurance quality
Industry is widely recognized as.External Bonded (abbreviation EB) technology, also known as external bonding method for strengthening, carbon cloth or plate are glued
The stress surface that structure needs reinforcement is labelled to reinforce to structure.EB technology is received because of its simple process, easy for construction
The favor of engineering circles.But as research and application are goed deep into, the defect of EB technology gradually exposes.On the one hand, outer patch technique is difficult to send out
Wave the high-strength performance of this material；On the other hand, often there is the destruction shape of CFRP- concrete removing in outer patch CFRP ruggedized construction
State, this destruction that Brittleness is presented cause structure to lose bearing capacity before giving full play to CFRP material property.
External Bonded (abbreviation EB): external bonding method for strengthening.The disadvantage is that the outer patch technique that this method uses is difficult to
Play the tensile strength of CFRP.The present invention is compared to EB technology, it is therefore an objective to which guarantee construction procedure as far as possible does not increase too much and significantly
The tensile strength of CFRP is played in the case where the polishing area for reducing concrete surface completely.
Near Surfae Mounted (abbreviation NSM): Strengthened With Near Surface Mounted method for strengthening.The disadvantages of the method are as follows NSM system can not be made
CFRP material in system reaches its tensile strength, and construction is needed with a large amount of epoxide-resin glue.The present invention is compared to NSM technology
The tensile strength of CFRP can be given full play to first, while reduce the usage amount of epoxide-resin glue, and complexity of constructing has
It is reduced.
Summary of the invention
In view of this, the present invention provides method and application that a kind of external bonding of band anchoring reinforces concrete structure,
In order to make full use of the strength of materials of CFRP, the present invention will improve existing reinforcement technique to reach this purpose.
The present invention solves above-mentioned technical problem by following technological means:
The method that a kind of external bonding of band anchoring of the invention reinforces concrete structure, is following steps:
(1) aperture is carried out in beam tension side, is cleaned out dust in beam surface and hole using compressed air；
(2) carbon fibre bar is prepared, is infiltrated the carbon cloth cut 3 minutes with epoxide-resin glue, so that sufficiently infiltration,
Extra glue is scraped off later, then carbon cloth is subjected to doubling three times in the width direction, needs to be compacted catch up with repeatedly after each doubling
Bubble is out to guarantee to fit closely between carbon cloth；Carbon fiber patch is prepared, the carbon fiber patch asphalt mixtures modified by epoxy resin that will be cut
Rouge glue infiltrates 3 minutes, scrapes off extra glue later；
(3) it deploys epoxide-resin glue: usingS epoxide-resin glue mixes A glue and B glue volume proportion for 100:42
It closes, stirs five minutes, AB glue is uniformly mixed, with deployed asphalt mixtures modified by epoxy resin using blender and using the revolving speed of 400-600RPM
Hole is filled and slot inner surface is spread epoxy resin by rouge glue；
(4) carbon fiber patch is pasted onto hole left or right side first and makes carbon fiber patch edge and hole edge phase
Cut place i.e. bottom patch；An iron leg silk is cut, iron wire is bent to U-shaped, it will be in the midpoint and slot of the carbon fibre bar that made
Point alignment reuses iron wire and is slowly pressed into carbon fibre bar in hole, meanwhile, another side cavities also carry out same operation, make carbon
Fiber bar tenses in alignment to guarantee, fiber bar is depressed into behind the bottom of hole slowly extracts iron wire, will finally infiltrate again
The covering of carbon fiber patch is pasted at anchoring i.e. top layer patch；
(5) mounted beam is placed to the solidification for waiting glue in clean environments, the adhesive curing time is 1-2 weeks).
The hole depth 100-150mm of aperture in the step (1).
Carbon cloth a length of 1000-1300mm that the step (2) uses, width 100-150mm, the length of carbon fiber patch
For 130-170mm, width 80-120mm.
Its beam, plate, column for being applied to industry or civil buildings, and the reinforcing of bridge, tunnel and culvert.
EB method uses outer patch technique, therefore failure mode is generally CFRP stripping damage, therefore is difficult to give full play to CFRP's
Tensile strength, EB technology can only play 40%-50% of its tensile strength or so.The present invention, can be complete compared to EB technology
The tensile strength for playing material makes CFRP reinforcement material rupture failure.
NSM method is the development and innovation in original EB technical foundation, and principle is opened on reinforced concrete member surface
Slot is tightly combined in CFRP tendons embedded groove it with component using binder (epoxide-resin glue), reaches reinforcing and benefit with this
Strong purpose.The disadvantages of the method are as follows being difficult to give full play to the tensile strength of CFRP, the CFRP material in NSM system can not be made to reach
Its tensile strength, and construction is needed with a large amount of epoxide-resin glue.The present invention first can be by the tension of CFRP compared to NSM technology
Intensity gives full play to, while reducing the usage amount of epoxide-resin glue, and complexity of constructing decreases.
It is compared with EB technology, method of the present invention due to using anchoring can give full play to the tensile strength of CFRP, EB skill
The structure that art is reinforced is only capable of playing the 40%-50% of CFRP tensile strength, and the structure that the present invention reinforces then can be by CFRP tension
Intensity plays completely.
Compared to NSM technology, the tensile strength of CFRP has been given full play to present invention employs the method for anchoring.And
Construction procedure compared to NSM, the present invention is without fluting, it is only necessary to and a small amount of hole is opened, construction procedure is simplified, due to being not necessarily to fluting,
The present invention reduces the usage amount of epoxide-resin glue without the encapsulating into slot.
EB technology is widely used in China, and such as Taizhou of Zhejiang ACE Semi JinRong Building in 2015 uses system because changing structure,
Increase load, project need to be reinforced, is reinforced with regard to using the technology；NSM technology is then more in foreign applications, such as:
1999, a pre-tensioned prestressing T steel Concrete Beam Reinforced on southern German Tobel bridge was in a traffic accident by truck
It breaks, and reinforcing is carried out using NSM technology.
The present invention can then substitute EB and NSM technology in many practical applications, and since the present invention compares both skills
Art can more give full play to the tensile strength of carbon cloth, therefore the building that the present invention is reinforced has higher reliability；And phase
Compared with NSM technology, present invention decreases construction complexities.As it can be seen that application prospect of the invention is extensive.
Beneficial effects of the present invention: the method for present invention simplicity joined the anchor system being easily installed, so that CFRP
Tensile strength can give full play to.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the top view of 1 sample beam of the embodiment of the present invention.
Fig. 2 is the side view of 1 sample beam of the embodiment of the present invention.
Fig. 3 is that the embodiment of the present invention 1 makes carbon fiber reinforcement part schematic diagram.
Fig. 4 is 1 scheme of installation of the embodiment of the present invention.
Fig. 5 is the breaking test result of mounted beam in the embodiment of the present invention 1.
Fig. 6 is the breaking test result that EB technology reinforced concrete beam is used in the embodiment of the present invention 1.
Fig. 7 is to carry out breaking test result using NSM technology reinforced concrete beam in the embodiment of the present invention 1.
Specific embodiment
Below with reference to attached drawing, the present invention is described in detail, as shown in Figure 1: a kind of band of the invention of the present embodiment
The method that the external bonding of anchoring reinforces concrete structure, is following steps:
(1) aperture is carried out in beam tension side, is cleaned out dust in beam surface and hole using compressed air；
(2) carbon fibre bar is prepared, is infiltrated the carbon cloth cut 3 minutes with epoxide-resin glue, so that sufficiently infiltration,
Extra glue is scraped off later, then carbon cloth is subjected to doubling three times in the width direction, needs to be compacted catch up with repeatedly after each doubling
Bubble is out to guarantee to fit closely between carbon cloth；Carbon fiber patch is prepared, the carbon fiber patch asphalt mixtures modified by epoxy resin that will be cut
Rouge glue infiltrates 3 minutes, scrapes off extra glue later；
(3) it deploys epoxide-resin glue: usingS epoxide-resin glue mixes A glue and B glue volume proportion for 100:42
It closes, stirs five minutes, AB glue is uniformly mixed, with deployed asphalt mixtures modified by epoxy resin using blender and using the revolving speed of 400-600RPM
Hole is filled and slot inner surface is spread epoxy resin by rouge glue；
(4) carbon fiber patch is pasted onto hole left or right side first and makes carbon fiber patch edge and hole edge phase
Cut place i.e. bottom patch；An iron leg silk is cut, iron wire is bent to U-shaped, it will be in the midpoint and slot of the carbon fibre bar that made
Point alignment reuses iron wire and is slowly pressed into carbon fibre bar in hole, meanwhile, another side cavities also carry out same operation, make carbon
Fiber bar tenses in alignment to guarantee, fiber bar is depressed into behind the bottom of hole slowly extracts iron wire, will finally infiltrate again
The covering of carbon fiber patch is pasted at anchoring i.e. top layer patch；
(5) mounted beam is placed to the solidification for waiting glue in clean environments, the adhesive curing time is 1-2 weeks).
The hole depth 100-150mm of aperture in the step (1).
Carbon cloth a length of 1000-1300mm that the step (2) uses, width 100-150mm, the length of carbon fiber patch
For 130-170mm, width 80-120mm.
Its beam, plate, column for being applied to industry or civil buildings, and the reinforcing of bridge, tunnel and culvert.
Embodiment 1
As shown in Figs. 1-2, aperture, hole depth 127mm are carried out in beam tension side.It will be in beam surface and hole using air compressor
Dust cleans out
As shown in figure 3, the carbon cloth used in test is having a size of 1116mm × 127mm, the size of carbon fiber patch is
152mm×100mm.The carbon cloth cut is infiltrated 3 minutes to guarantee sufficiently infiltration with epoxide-resin glue, is scraped off later more
Remaining glue, then carbon cloth is subjected to doubling three times in the width direction, it needs to be compacted drive bubble out of repeatedly after each doubling to protect
It is fitted closely between card carbon cloth.
Hole is filled with deployed epoxy glue and slot inner surface is spread into epoxy resin.
As shown in figure 4, the carbon fiber patch infiltrated is pasted at design position i.e. bottom patch first.Cut one section
Iron wire is bent to U-shaped by iron wire, and the carbon fibre bar made is carried out doubling at experimental design anchoring, fold position is placed on
At the hole that beam has been accomplished fluently, carbon fibre bar is slowly pressed into hole using iron wire, meanwhile, another side cavities also carry out identical
Operation, can be such that carbon fibre bar tenses in alignment to guarantee by the operation.Fiber bar is depressed into behind the bottom of hole and is slowly pulled out
Iron wire out.The carbon fiber patch infiltrated covering is finally pasted at anchoring i.e. top layer patch again.
Mounted beam is placed the solidification for waiting glue in clean environments by the sample beam after being installed later.
By beam mounted in the present embodiment 1 and using EB technology reinforced concrete beam, NSM technology reinforced concrete beam into
Row breaking test, as a result such as Fig. 5,6 and 7.Fig. 5 is using laboratory result of the invention, and average bearing capacity can reach 79kN,
Highest bearing capacity is 87kN, by calculating, the stress level average out to 117% that fiber cloth is played, and up to 128%；Fig. 6 is
Using the laboratory result of EB technology, average bearing capacity can reach 41kN, and highest bearing capacity is 44kN, by calculating, fiber
The stress level average out to 58% that cloth is played, up to 62%；Fig. 7 is the laboratory result using NSM technology, is averagely held
51kN can be reached by carrying power, and highest bearing capacity is 58kN, by calculating, the stress level average out to 81% that fiber cloth is played, most
A height of 94%.As it can be seen that the present invention can efficiently use the high-strength pulling-resisting intensity of fiber cloth, make its tension compared to EB and NSM technology
Intensity can give full play to.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (4)
1. a kind of method that external bonding of band anchoring reinforces concrete structure, which is characterized in that be following steps:
(1) aperture is carried out in beam tension side, is cleaned out dust in beam surface and hole using compressed air；
(2) carbon fibre bar is prepared, is infiltrated the carbon cloth cut 3 minutes with epoxide-resin glue, so that sufficiently infiltration, later
Extra glue is scraped off, then carbon cloth is subjected to doubling three times in the width direction, needs to be compacted drive gas out of repeatedly after each doubling
Bubble is to guarantee to fit closely between carbon cloth；Carbon fiber patch is prepared, the carbon fiber patch epoxide-resin glue that will be cut
Infiltration 3 minutes, scrapes off extra glue later；
(3) it deploys epoxide-resin glue: usingA glue and B glue volume proportion are mixed for 100:42, are made by S epoxide-resin glue
It stirs five minutes, AB glue is uniformly mixed, with deployed epoxide-resin glue with blender and using the revolving speed of 400-600RPM
Hole is filled and slot inner surface is spread into epoxy resin；
(4) carbon fiber patch is pasted onto hole left or right side first and makes carbon fiber patch edge and hole edge the tangent
That is bottom patch；An iron leg silk is cut, iron wire is bent to U-shaped, by the midpoint pair at the midpoint for the carbon fibre bar made and slot
Together, it reuses iron wire and is slowly pressed into carbon fibre bar in hole, meanwhile, another side cavities also carry out same operation, make carbon fiber
Muscle tension is in alignment to guarantee, fiber bar is depressed into behind the bottom of hole and slowly extracts iron wire, the carbon fiber that will finally infiltrate again
Dimension patch covering is pasted at anchoring i.e. top layer patch；
(5) mounted beam is placed to the solidification for waiting glue in clean environments, the adhesive curing time is 1-2 weeks).
2. the method that a kind of external bonding of band anchoring according to claim 1 reinforces concrete structure, it is characterised in that:
The hole depth 100-150mm of aperture in the step (1).
3. the method that a kind of external bonding of band anchoring according to claim 1 reinforces concrete structure, it is characterised in that:
The carbon cloth a length of 1000-1300mm, width 100-150mm, a length of 130- of carbon fiber patch that the step (2) uses
170mm, width 80-120mm.
4. the application that a kind of external bonding of band anchoring reinforces concrete structure, it is characterised in that: it is applied to industry or the people
With the beam, plate, column of building, and the reinforcing of bridge, tunnel and culvert.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811273437.7A CN109457992B (en) | 2018-10-30 | 2018-10-30 | Method for sticking reinforced concrete structure outside body with anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811273437.7A CN109457992B (en) | 2018-10-30 | 2018-10-30 | Method for sticking reinforced concrete structure outside body with anchor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109457992A true CN109457992A (en) | 2019-03-12 |
| CN109457992B CN109457992B (en) | 2021-10-08 |
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| CN201811273437.7A Active CN109457992B (en) | 2018-10-30 | 2018-10-30 | Method for sticking reinforced concrete structure outside body with anchor |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1251152A (en) * | 1997-07-31 | 2000-04-19 | 塞卡股份公司,原卡斯帕魏克拉及两合公司 | Flat strip lamella for reinforcing building components and method for placing flat strip lamella on component |
| CN101240662A (en) * | 2008-03-13 | 2008-08-13 | 山东省建筑科学研究院 | Inner binding outer cramping method architecture structural crack comprehensive processing method |
| CN101691817A (en) * | 2009-09-14 | 2010-04-07 | 华东交通大学 | Method for additionally anchoring reinforced concrete beam strengthened with FRP cloth material in anti-bending way |
| CN101696589A (en) * | 2009-10-13 | 2010-04-21 | 华侨大学 | Novel combined stone beam |
| CN201460025U (en) * | 2009-07-02 | 2010-05-12 | 广厦建设集团有限责任公司 | Concrete member embedded with FRP slat or rib on surface layer |
| CN201962964U (en) * | 2011-03-24 | 2011-09-07 | 广西工学院 | Prestressed fiber resin compound rib-embedded and adhered reinforced concrete structure |
| CN103993752A (en) * | 2014-05-26 | 2014-08-20 | 中国矿业大学 | Method for repairing and reinforcing concrete structure under severe environment |
| CN105952180A (en) * | 2016-05-31 | 2016-09-21 | 广东工业大学 | Method for reinforcing concrete structure through embedded wet and sticky FRP strips and component of method |
| CN106978906A (en) * | 2017-03-29 | 2017-07-25 | 北京建筑大学 | A kind of anchoring process of new type FRP cloth reinforcing masonry structure end |
-
2018
- 2018-10-30 CN CN201811273437.7A patent/CN109457992B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1251152A (en) * | 1997-07-31 | 2000-04-19 | 塞卡股份公司,原卡斯帕魏克拉及两合公司 | Flat strip lamella for reinforcing building components and method for placing flat strip lamella on component |
| CN101240662A (en) * | 2008-03-13 | 2008-08-13 | 山东省建筑科学研究院 | Inner binding outer cramping method architecture structural crack comprehensive processing method |
| CN201460025U (en) * | 2009-07-02 | 2010-05-12 | 广厦建设集团有限责任公司 | Concrete member embedded with FRP slat or rib on surface layer |
| CN101691817A (en) * | 2009-09-14 | 2010-04-07 | 华东交通大学 | Method for additionally anchoring reinforced concrete beam strengthened with FRP cloth material in anti-bending way |
| CN101696589A (en) * | 2009-10-13 | 2010-04-21 | 华侨大学 | Novel combined stone beam |
| CN201962964U (en) * | 2011-03-24 | 2011-09-07 | 广西工学院 | Prestressed fiber resin compound rib-embedded and adhered reinforced concrete structure |
| CN103993752A (en) * | 2014-05-26 | 2014-08-20 | 中国矿业大学 | Method for repairing and reinforcing concrete structure under severe environment |
| CN105952180A (en) * | 2016-05-31 | 2016-09-21 | 广东工业大学 | Method for reinforcing concrete structure through embedded wet and sticky FRP strips and component of method |
| CN106978906A (en) * | 2017-03-29 | 2017-07-25 | 北京建筑大学 | A kind of anchoring process of new type FRP cloth reinforcing masonry structure end |
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| Publication number | Publication date |
|---|---|
| CN109457992B (en) | 2021-10-08 |
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