CN101781936B - Method and device for reinforcing beam by adopting prestressed carbon fiber plate - Google Patents
Method and device for reinforcing beam by adopting prestressed carbon fiber plate Download PDFInfo
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- CN101781936B CN101781936B CN200910252181A CN200910252181A CN101781936B CN 101781936 B CN101781936 B CN 101781936B CN 200910252181 A CN200910252181 A CN 200910252181A CN 200910252181 A CN200910252181 A CN 200910252181A CN 101781936 B CN101781936 B CN 101781936B
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- carbon fiber
- fiber board
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 84
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 84
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000003014 reinforcing effect Effects 0.000 title abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 45
- 239000010959 steel Substances 0.000 claims description 45
- 230000002787 reinforcement Effects 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention relates to a method and a device for reinforcing a beam by adopting a prestressed carbon fiber plate, which comprises the following steps: 1) fixing an anchoring device at two ends of a carbon fiber plate respectively, and fixing the carbon fiber plate on a reinforced beam through a high-strength bolt; 2) arranging a tensioning device between the two anchoring devices, and forming prestress on the carbon fiber plate by operating the tensioning device; 3) and when the prestress is adjusted to reach a design value, replacing the tensioning device with a concrete cushion block to maintain the tensioning state of the carbon fiber plate. The invention is specially provided with the anchoring devices at the two ends of the carbon fiber plate, the distance between the carbon fiber plate and the reinforced beam is adjusted through the tensioning device, the transverse tensioning of the carbon fiber plate is realized, the structure is simple, the construction operation is convenient, and the invention can be widely applied to the reinforcing process of various engineering structures.
Description
Technical field
The present invention relates to a kind of engineering structures reinforcement means and device, particularly about a kind of method and device that adopts pre-stressed carbon fiber plate reinforcement.
Background technology
Engineering structures be along with the growth of service time can cause wearing out, because the change of function of use, workmanship existing problems and suffer reason such as natural calamity need take the reinforcing measure.Traditional reinforcement means mainly contains: enlarging section method, encased steel reinforcing method, outside reinforcement by sticking of sheets, prestressed reinforcement method, setting support reinforcing method, crack patching and sprayed mortar reinforcing method etc.Compare with traditional reinforcing method; Carbon fibre composite (CFRP; Therefore advantages such as Carbon Fiber Reinforced Polymers) reinforcing method has intensity height, construction convenient and efficient, resistance to chemical attack is excellent, applicability is good, have obtained extensive use.Although carbon fibre composite has very high intensity, modulus of elasticity is lower, and the performance of its intensity to be being deformed into cost, thereby its high strength is difficult to be not fully exerted, and pre-stressed carbon fiber is reinforced and can be addressed this problem well.But because the tensile strength of carbon fiber board is very high, smooth surface and its shear strength are very low, so the stretch-draw anchor problem that the pre-stressed carbon fiber plate is reinforced fails to solve well so far.
Summary of the invention
To the problems referred to above, the purpose of this invention is to provide a kind of method and device that adopts pre-stressed carbon fiber plate reinforcement.
For realizing above-mentioned purpose; The present invention takes following technical scheme: a kind of method that adopts pre-stressed carbon fiber plate reinforcement; It may further comprise the steps: 1) at the two ends of a carbon fiber board anchor device is set respectively, and through bolt two anchor devices is fixed on and is reinforced on the beam; 2) between said two anchor devices, tensioning equipment is set, through to forming prestressing force on the said carbon fiber board of operating in of tensioning equipment; When 3) the said prestressing force of adjusting reaches design load, replace said tensioning equipment with concrete pad, to keep the tensile state of said carbon fiber board.
After said step 1), between said two anchor devices, be provided with more than one and connect the device that sockets that is reinforced beam and carbon fiber board; And in said step 2) in, between said two anchor devices, set up an above tensioning equipment, with at said anchor device and saidly socket between the device or respectively socketing between the device, said carbon fiber board is formed many places stretch-draw.
Anchor device in the said step 1) comprises steel clamping plate, down steel clamping plate and high-strength bolt, and said carbon fiber board is folded in said going up between steel clamping plate and the following steel clamping plate, fixes through binding resin and high-strength bolt and said upper and lower steel clamping plate.
Said upward steel clamping plate are symmetrical structure with following steel clamping plate, anchored end and back anchored end before including, and the center line both sides of said preceding anchored end are provided with the clamping screw, make the high-strength bolt that is arranged in said clamping screw be positioned at the both sides of said carbon fiber board; On the center line of said back anchored end the center line screw is set, makes the high-strength bolt that is arranged in said center line screw pass said carbon fiber board.
A kind of device of realizing the employing pre-stressed carbon fiber plate reinforcement of said method; It is characterized in that: it comprises the carbon fiber board two ends is fixed on the anchor device that is reinforced on the beam; Be arranged on and be used on said carbon fiber board, forming prestressed tensioning equipment between said two anchor devices; And the prestressing force on being applied to said carbon fiber board is when reaching design load, the concrete pad that is used to replace each said tensioning equipment.
Between two said anchor devices, be provided with more than one to connect and be reinforced the device that sockets of beam and carbon fiber board, and two above tensioning equipments are set between said two anchor devices.
Said anchor device comprises steel clamping plate, following steel clamping plate and high-strength bolt, and said carbon fiber board is fixed on said going up between steel clamping plate and the following steel clamping plate through binding resin and high-strength bolt, and through being bolted to said being reinforced on the beam.
The said steel clamping plate of going up are symmetrical structure with following steel clamping plate, anchored end and back anchored end before including; The center line both sides of anchored end are provided with the clamping screw before said; Be fixed on high-strength bolt in the said clamping screw in both sides and be positioned at the both sides of said carbon fiber board; On the center line of said back anchored end the center line screw is set, the high-strength bolt that is fixed in the said center line screw passes said carbon fiber board.
The present invention is owing to take above technical scheme; It has the following advantages: 1, the present invention is owing to be provided with an anchor device respectively at the two ends of carbon fiber board; Simultaneously anchor device is adopted the mixing anchorage style of colloid bonding, steel plate clamping and carbon fiber board perforation, therefore solved the problem that carbon fiber board is difficult for anchoring effectively.2, the present invention regulates carbon fiber board through tensioning equipment and is reinforced the distance between the beam, therefore can be through the conventional effect that realizes quantitative stretch-draw carbon fiber board of calculating.3, the present invention is owing to be that carbon fiber board is adopted transverse stretching, so its stretching force that applies is far below the vertical stretching force of tradition.4, prestressed stretch-draw of the present invention, anchor device can adopt the mode of subsection tension to carry out stretch-draw according to the length difference that is reinforced beam, therefore can avoid the lateral deformation of carbon fiber board excessive.The present invention is simple in structure, and constructing operation is convenient, and it can be widely used in the reinforcing process of various different engineering structuress.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is an anchor device structural representation of the present invention
Fig. 3 is that the upper and lower steel clamping plate of the present invention connect schematic top plan view
The specific embodiment
Carry out detailed description below in conjunction with accompanying drawing and embodiment to of the present invention.
As shown in Figure 1, apparatus of the present invention comprise the anchor device 2 that is separately positioned on carbon fiber board 1 two ends, are arranged between two anchor devices 2 pre-stress stretching device 3 and socket device 4.
As shown in Figure 2, anchor device 2 is taked the mixing anchorage style of colloid bonding, steel plate clamping, carbon fiber board perforation, and it comprises steel clamping plate 21, following steel clamping plate 22 and high-strength bolt 23.As shown in Figure 3, the size of last steel clamping plate 21 and following steel clamping plate 22 is identical with structure, thickness can be the steel plate of 10mm, and last steel clamping plate 21 are the center line symmetrical structure with following steel clamping plate 22.Above steel clamping plate 21 are example; Anchored end 24 and back anchored end 25 before it can be divided into; Preceding anchored end 24 is symmetrically arranged with two groups of clamping screws 26 along center line; Two groups of clamping screws 26 lay respectively at carbon fiber board 1 both sides after the connection, make high-strength bolt 23 not pass carbon fiber board 1, can the intensity of carbon fiber board 1 not impacted.A plurality of center line screws 27 are set on the center line of back anchored end 25, because it is center line screw 27 is positioned at the end of carbon fiber board 1,, also smaller to the influence of its intensity even high-strength bolt 23 passes from carbon fiber board 1.The present invention places carbon fiber board 1 between steel clamping plate 21 and the following steel clamping plate 22, will go up steel clamping plate 21, carbon fiber board 1 and following steel clamping plate 22 with binding resin and bond together, and through high-strength bolt 23 three fixed.
Among the embodiment of above-mentioned anchor device 2, the processing of should polishing of last steel clamping plate 21 and the following steel clamping plate 22 and the contact site of carbon fiber board 1 is with increase frictional force.
In the foregoing description; Tensioning equipment 3 can be confirmed according to the physical length of carbon fiber board 1 with the number that sockets device 4; Socket device 4 such as being provided with two, socket the carbon fiber board 1 between the device 4 and be reinforced between the beam 5, just need set up a tensioning equipment 3 at two.Continue to increase the also corresponding increase of the quantity of tensioning equipment 3 if socket the quantity of device 4.
In the foregoing description, if it is shorter to be reinforced beam 5, the device 4 that sockets at middle part can not be provided with yet, and directly a tensioning equipment 3 is set between two anchor devices 2.Socketing device 4 in addition when being provided with, can be to hold in the palm a block plate in the bottom of carbon fiber board 1, is reinforced on the beam and steel plate is fixed by bolts to, and bolt does not pass carbon fiber board 1, and is positioned at the both sides of carbon fiber board 1.
The key step of the inventive method comprises:
1, do not damaging under the prerequisite that is reinforced beam 5 self structure,, two anchor devices 2 are being reinforced on the beam 5 through being bolted to, between two anchor devices 2, do not socketing device 4 (as shown in Figure 1) if at least one is set being reinforced the position punching.
2, the middle part of carbon fiber board 1 is passed socketed device 4, the two ends of carbon fiber board 1 are anchored at through anchor device 2 are reinforced on the beam 5, do not socket device 4 just directly through anchor device 2 anchoring carbon fiber boards 1 if be not provided with.
3, at carbon fiber board 1 and be reinforced one (not establishing under the situation that sockets device 4) or an above tensioning equipment 3 are set between the beam 5; Tensioning equipment 3 lays respectively between two anchor devices 2 and (does not establish under the situation that sockets device 4); Or each anchor device 2 and socketing between the device 4; Or respectively socket between the device 4, apply and be reinforced beam 5 active force in the opposite direction through 3 pairs of carbon fiber boards 1 of tensioning equipment, carbon fiber board 1 is pulled away from is reinforced beam 5.Carbon fiber board 1 is because the prestressing force that lateral deformation produces can combine carbon fiber board 1 to calculate with respect to the displacement that is reinforced beam 5 according to the modulus of elasticity of its material.
4, through after regulating tensioning equipment 3 and regulating carbon fiber boards 1 stress value and reach designing requirement, substitute tensioning equipments 3 through being arranged on the concrete pad 6 that is reinforced between beam 5 and the carbon fiber board 1, with the tensile state of maintenance to carbon fiber board 1.
The above only is a preferred implementation of the present invention, should be pointed out that for those skilled in the art, and under the prerequisite that does not break away from the principle of the invention, improvement of carrying out and variation should not got rid of outside protection scope of the present invention.
Claims (4)
1. method that adopts pre-stressed carbon fiber plate reinforcement, it may further comprise the steps:
1) at the two ends of a carbon fiber board anchor device is set respectively, and through bolt two anchor devices is fixed on and is reinforced on the beam; Said anchor device comprises steel clamping plate, down steel clamping plate and high-strength bolt, and said carbon fiber board is folded in said going up between steel clamping plate and the following steel clamping plate, fixes through binding resin and high-strength bolt and said upper and lower steel clamping plate; Said steel clamping plate and the following steel clamping plate symmetrical structure of respectively doing for oneself of going up, anchored end and back anchored end before including, the center line both sides of said preceding anchored end are provided with the clamping screw, make the high-strength bolt that is arranged in said clamping screw be positioned at the both sides of said carbon fiber board; On the center line of said back anchored end the center line screw is set, makes the high-strength bolt that is arranged in said center line screw pass said carbon fiber board;
2) between said two anchor devices, tensioning equipment is set, through to forming prestressing force on the said carbon fiber board of operating in of tensioning equipment;
When 3) the said prestressing force of adjusting reaches design load, replace said tensioning equipment with concrete pad, to keep the tensile state of said carbon fiber board.
2. a kind of method that adopts pre-stressed carbon fiber plate reinforcement as claimed in claim 1 is characterized in that: after said step 1), between said two anchor devices, be provided with more than one and connect the device that sockets that is reinforced beam and carbon fiber board; And in said step 2) in, between said two anchor devices, set up an above tensioning equipment, with at said anchor device and saidly socket between the device or respectively socketing between the device, said carbon fiber board is formed many places stretch-draw.
3. the device of the employing pre-stressed carbon fiber plate reinforcement of a realization such as claim 1 or 2 each said methods; It is characterized in that: it comprises the carbon fiber board two ends is fixed on the anchor device that is reinforced on the beam; Be arranged on and be used on said carbon fiber board, forming prestressed tensioning equipment between said two anchor devices; And the prestressing force on being applied to said carbon fiber board is when reaching design load, the concrete pad that is used to replace each said tensioning equipment; Said anchor device comprises steel clamping plate, following steel clamping plate and high-strength bolt, and said carbon fiber board is fixed on said going up between steel clamping plate and the following steel clamping plate through binding resin and high-strength bolt, and through being bolted to said being reinforced on the beam; Said steel clamping plate and the following steel clamping plate symmetrical structure of respectively doing for oneself of going up, before including anchored end with after anchored end; The center line both sides of anchored end are provided with the clamping screw before said; Be fixed on high-strength bolt in the said clamping screw in both sides and be positioned at the both sides of said carbon fiber board; On the center line of said back anchored end the center line screw is set, the high-strength bolt that is fixed in the said center line screw passes said carbon fiber board.
4. a kind of device that adopts pre-stressed carbon fiber plate reinforcement as claimed in claim 3; It is characterized in that: between two said anchor devices, be provided with more than one to connect and be reinforced the device that sockets of beam and carbon fiber board, and two above tensioning equipments are set between said two anchor devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910252181A CN101781936B (en) | 2009-12-10 | 2009-12-10 | Method and device for reinforcing beam by adopting prestressed carbon fiber plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910252181A CN101781936B (en) | 2009-12-10 | 2009-12-10 | Method and device for reinforcing beam by adopting prestressed carbon fiber plate |
Publications (2)
| Publication Number | Publication Date |
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| CN101781936A CN101781936A (en) | 2010-07-21 |
| CN101781936B true CN101781936B (en) | 2012-10-03 |
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| CN200910252181A Expired - Fee Related CN101781936B (en) | 2009-12-10 | 2009-12-10 | Method and device for reinforcing beam by adopting prestressed carbon fiber plate |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942903B (en) * | 2010-08-16 | 2012-03-07 | 合肥工业大学 | Device for reinforcing concrete beam slab by pretension carbon fiber plate and construction method |
| CN102661055B (en) * | 2012-03-12 | 2015-04-15 | 河海大学 | Reinforcing device for reinforced concrete column using prestressing cable, and application method thereof |
| CN102922602B (en) * | 2012-11-08 | 2014-10-08 | 东南大学 | Process for preparing prefabricated intelligent fiber reinforce plastic (FRP)-concrete composite structure |
| CN103912133B (en) * | 2014-03-19 | 2016-01-13 | 华北水利水电大学 | Vierendeel girder transverse stretching pre-stressed carbon fiber sheet material reinforcement means |
| CN103912132B (en) * | 2014-03-19 | 2016-01-13 | 华北水利水电大学 | The method of transverse stretching prestressed carbon cloth and steel composite consolidation Vierendeel girder |
| CN104100100B (en) * | 2014-07-14 | 2016-03-02 | 扬州大学 | The method of Tests of Reinforced Concrete Beams Strengthened With Cfrp-laminate is drawn in micro-varicose |
| CN107630564B (en) * | 2017-09-12 | 2020-04-10 | 叶长青 | Construction method for reinforced structure of concrete beam |
| CN107842210A (en) * | 2017-12-08 | 2018-03-27 | 清华大学 | The construction package and its method for applying prestressing force of CFRP plate multi-point support prestressed reinforcements |
| CN108560943A (en) * | 2018-04-10 | 2018-09-21 | 清华大学 | The CFRP prestressing force assembled reinforcement means and reinforcement assembly of light steel flexural member |
| CN109469347B (en) * | 2018-10-30 | 2021-03-05 | 河北省建筑科学研究院有限公司 | Be applied to external prestressing force's of assembled style of calligraphy end anchor |
| CN110017034B (en) * | 2019-04-28 | 2021-09-03 | 四川大学 | Mounting method of prestressed carbon fiber tensioning and anchoring device for resisting fatigue of beam |
| CN113530283A (en) * | 2021-04-22 | 2021-10-22 | 上海悍马建筑科技有限公司 | Stress supplementing method for prestressed carbon fiber plate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4001577A1 (en) * | 1990-01-20 | 1991-07-25 | Plica Peter | Prestressing component anchoring system - has plastics strip between saddle and loop formed in component |
| KR20050073060A (en) * | 2004-01-08 | 2005-07-13 | 주식회사 엠텍 | The continuous manufacturing method of the fiber and steel composite panel and the reinforcing method of concrete structures and steel structures by anchoring the above panel after tensioning |
| CN1693623A (en) * | 2005-05-10 | 2005-11-09 | 田安国 | Method for strengthening construction unit using high strength fibre cloth |
| CN1827975A (en) * | 2006-03-30 | 2006-09-06 | 尚守平 | Carbon fiber board anchor for civil engineering construction |
| CN101435184A (en) * | 2008-12-05 | 2009-05-20 | 广州大学 | Method for actively reinforcing wide-span concrete case beam bridge web |
| CN201649685U (en) * | 2009-12-10 | 2010-11-24 | 中国建筑科学研究院 | Apparatus for reinforcing beam by a prestressed carbon fiber board |
-
2009
- 2009-12-10 CN CN200910252181A patent/CN101781936B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4001577A1 (en) * | 1990-01-20 | 1991-07-25 | Plica Peter | Prestressing component anchoring system - has plastics strip between saddle and loop formed in component |
| KR20050073060A (en) * | 2004-01-08 | 2005-07-13 | 주식회사 엠텍 | The continuous manufacturing method of the fiber and steel composite panel and the reinforcing method of concrete structures and steel structures by anchoring the above panel after tensioning |
| CN1693623A (en) * | 2005-05-10 | 2005-11-09 | 田安国 | Method for strengthening construction unit using high strength fibre cloth |
| CN1827975A (en) * | 2006-03-30 | 2006-09-06 | 尚守平 | Carbon fiber board anchor for civil engineering construction |
| CN101435184A (en) * | 2008-12-05 | 2009-05-20 | 广州大学 | Method for actively reinforcing wide-span concrete case beam bridge web |
| CN201649685U (en) * | 2009-12-10 | 2010-11-24 | 中国建筑科学研究院 | Apparatus for reinforcing beam by a prestressed carbon fiber board |
Non-Patent Citations (1)
| Title |
|---|
| 邓朗妮等.预应力碳纤维板加固钢筋混凝土梁施工工艺.《混凝土》.2009,(第8期), * |
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| CN101781936A (en) | 2010-07-21 |
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