CN101781936A - 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
- Publication number
- CN101781936A CN101781936A CN200910252181A CN200910252181A CN101781936A CN 101781936 A CN101781936 A CN 101781936A CN 200910252181 A CN200910252181 A CN 200910252181A CN 200910252181 A CN200910252181 A CN 200910252181A CN 101781936 A CN101781936 A CN 101781936A
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- carbon fiber
- clamping plate
- fiber board
- steel clamping
- strength bolt
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 90
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 90
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000003014 reinforcing effect Effects 0.000 title abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 50
- 239000010959 steel Substances 0.000 claims description 50
- 230000002787 reinforcement Effects 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 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
- 230000000694 effects Effects 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
- 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
- 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, Carbon Fiber Reinforced Polymers) reinforcing method has advantages such as intensity height, construction convenient and efficient, resistance to chemical attack excellence, applicability are good, therefore, has 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
At 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 achieving the above object, 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 by bolt two anchor devices is fixed on and is reinforced on the beam; 2) between described two anchor devices, tensioning equipment is set, by to forming prestressing force on the described carbon fiber board of operating in of tensioning equipment; When 3) the described prestressing force of adjusting reaches design load, replace described tensioning equipment with concrete pad, to keep the tensile state of described carbon fiber board.
After described step 1), between described 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 described step 2) in, between described two anchor devices, set up an above tensioning equipment, with at described anchor device and describedly socket between the device or respectively socketing between the device, described carbon fiber board is formed many places stretch-draw.
Anchor device in the described step 1) comprises steel clamping plate, down steel clamping plate and high-strength bolt, and described carbon fiber board is folded in described going up between steel clamping plate and the following steel clamping plate, fixes by binding resin and high-strength bolt and described upper and lower steel clamping plate.
Described upward steel clamping plate and following steel clamping plate are symmetrical structure, anchored end and back anchored end before including, and the center line both sides of described preceding anchored end are provided with the clamping screw, make the high-strength bolt that is arranged in described clamping screw be positioned at the both sides of described carbon fiber board; On the center line of described back anchored end the center line screw is set, makes the high-strength bolt that is arranged in described center line screw pass described carbon fiber board.
A kind of device of realizing the employing pre-stressed carbon fiber plate reinforcement of described 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 described carbon fiber board, forming prestressed tensioning equipment between described two anchor devices, and the prestressing force on being applied to described carbon fiber board is when reaching design load, the concrete pad that is used to replace each described tensioning equipment.
Between two described 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 described two anchor devices.
Described anchor device comprises steel clamping plate, following steel clamping plate and high-strength bolt, and described carbon fiber board is fixed on described going up between steel clamping plate and the following steel clamping plate by binding resin and high-strength bolt, and by being bolted to described being reinforced on the beam.
The described 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 described, be fixed on high-strength bolt in the described clamping screw in both sides and be positioned at the both sides of described carbon fiber board, on the center line of described back anchored end the center line screw is set, the high-strength bolt that is fixed in the described center line screw passes described 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 by tensioning equipment and is reinforced distance between the beam, therefore can be by 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
Be described in detail of the present invention below in conjunction with drawings and Examples.
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 and following steel clamping plate 22 are the center line symmetrical structure.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 by high-strength bolt 23 three be fixed.
Among the embodiment of above-mentioned anchor device 2, last steel clamping plate 21 and following steel clamping plate 22 should carry out grinding process with the contact site of carbon fiber board 1, to increase frictional force.
In the foregoing description, tensioning equipment 3 can be determined 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 by 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 by anchor device 2 are reinforced on the beam 5, do not socket device 4 just directly by 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 direction opposite effect power by 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 can calculate with respect to the displacement that is reinforced beam 5 in conjunction with carbon fiber board 1 according to the modulus of elasticity of its material owing to the prestressing force that lateral deformation produces.
4, by after regulating tensioning equipment 3 and regulating carbon fiber boards 1 stress value and reach designing requirement, substitute tensioning equipments 3 by 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 (9)
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 by bolt two anchor devices is fixed on and is reinforced on the beam;
2) between described two anchor devices, tensioning equipment is set, by to forming prestressing force on the described carbon fiber board of operating in of tensioning equipment;
When 3) the described prestressing force of adjusting reaches design load, replace described tensioning equipment with concrete pad, to keep the tensile state of described 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 described step 1), be provided with between described two anchor devices more than one and connect the device that sockets that is reinforced beam and carbon fiber board; And in described step 2) in, between described two anchor devices, set up an above tensioning equipment, with at described anchor device and describedly socket between the device or respectively socketing between the device, described carbon fiber board is formed many places stretch-draw.
3. a kind of method that adopts pre-stressed carbon fiber plate reinforcement as claimed in claim 1, it is characterized in that: the anchor device in the described step 1) comprises steel clamping plate, following steel clamping plate and high-strength bolt, described carbon fiber board is folded in described going up between steel clamping plate and the following steel clamping plate, fixes by binding resin and high-strength bolt and described upper and lower steel clamping plate.
4. a kind of method that adopts pre-stressed carbon fiber plate reinforcement as claimed in claim 2, it is characterized in that: the anchor device in the described step 1) comprises steel clamping plate, following steel clamping plate and high-strength bolt, described carbon fiber board is folded in described going up between steel clamping plate and the following steel clamping plate, fixes by binding resin and high-strength bolt and described upper and lower steel clamping plate.
5. as claim 1 or 2 or 3 or 4 described a kind of methods that adopt pre-stressed carbon fiber plate reinforcement, it is characterized in that: the described 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 described, make the high-strength bolt that is arranged in described clamping screw be positioned at the both sides of described carbon fiber board; On the center line of described back anchored end the center line screw is set, makes the high-strength bolt that is arranged in described center line screw pass described carbon fiber board.
6. a realization is as the device of claim 1～5 employing pre-stressed carbon fiber plate reinforcement of method as described in each, 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 described carbon fiber board, forming prestressed tensioning equipment between described two anchor devices, and the prestressing force on being applied to described carbon fiber board is when reaching design load, the concrete pad that is used to replace each described tensioning equipment.
7. a kind of device that adopts pre-stressed carbon fiber plate reinforcement as claimed in claim 6, it is characterized in that: between two described 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 described two anchor devices.
8. as claim 6 or 7 described a kind of devices that adopt pre-stressed carbon fiber plate reinforcement, it is characterized in that: described anchor device comprises steel clamping plate, following steel clamping plate and high-strength bolt, described carbon fiber board is fixed on described going up between steel clamping plate and the following steel clamping plate by binding resin and high-strength bolt, and by being bolted to described being reinforced on the beam.
9. a kind of device that adopts pre-stressed carbon fiber plate reinforcement as claimed in claim 8 is characterized in that: the described 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 described, be fixed on high-strength bolt in the described clamping screw in both sides and be positioned at the both sides of described carbon fiber board, on the center line of described back anchored end the center line screw is set, the high-strength bolt that is fixed in the described center line screw passes described carbon fiber board.
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 |
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| Publication Number | Publication Date |
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| CN101781936A true CN101781936A (en) | 2010-07-21 |
| CN101781936B 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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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942903A (en) * | 2010-08-16 | 2011-01-12 | 合肥工业大学 | Device for reinforcing concrete beam slab by pretension carbon fiber plate and construction method |
| CN102661055A (en) * | 2012-03-12 | 2012-09-12 | 河海大学 | Reinforcing device for reinforced concrete column using prestressing cable, and application method thereof |
| CN102922602A (en) * | 2012-11-08 | 2013-02-13 | 东南大学 | Process for preparing prefabricated intelligent fiber reinforce plastic (FRP)-concrete composite structure |
| CN103912132A (en) * | 2014-03-19 | 2014-07-09 | 华北水利水电大学 | Frame beam composite reinforcing method by transversely tensioning prestress carbon fiber cloth and steel |
| CN103912133A (en) * | 2014-03-19 | 2014-07-09 | 华北水利水电大学 | Lateral tension prestressing carbon fiber sheet reinforcing method for frame beam |
| CN104100100A (en) * | 2014-07-14 | 2014-10-15 | 扬州大学 | Method for strengthening reinforced concrete girder by using slightly curved and tensioned carbon fiber plates |
| CN107630564A (en) * | 2017-09-12 | 2018-01-26 | 叶长青 | The ruggedized construction of beams of concrete |
| 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 |
| CN109469347A (en) * | 2018-10-30 | 2019-03-15 | 河北省建筑科学研究院 | A kind of "-" type end anchor applied to assembled external prestressing |
| CN110017034A (en) * | 2019-04-28 | 2019-07-16 | 四川大学 | A kind of beam is antifatigue to use pre-stressed carbon fiber stretching and anchoring device and its installation method |
| 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 |
Family Cites Families (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 |
| CN100366845C (en) * | 2005-05-10 | 2008-02-06 | 田安国 | Method for strengthening construction unit using high strength fibre cloth |
| CN1332104C (en) * | 2006-03-30 | 2007-08-15 | 尚守平 | Carbon fiber board anchor for civil engineering construction |
| CN101435184B (en) * | 2008-12-05 | 2010-08-25 | 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
Cited By (21)
| 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 |
| CN101942903A (en) * | 2010-08-16 | 2011-01-12 | 合肥工业大学 | Device for reinforcing concrete beam slab by pretension carbon fiber plate and construction method |
| CN102661055A (en) * | 2012-03-12 | 2012-09-12 | 河海大学 | Reinforcing device for reinforced concrete column using prestressing cable, and application method thereof |
| 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 |
| CN102922602A (en) * | 2012-11-08 | 2013-02-13 | 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 |
| CN103912133A (en) * | 2014-03-19 | 2014-07-09 | 华北水利水电大学 | Lateral tension prestressing carbon fiber sheet reinforcing method for frame beam |
| 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 |
| CN103912132A (en) * | 2014-03-19 | 2014-07-09 | 华北水利水电大学 | Frame beam composite reinforcing method by transversely tensioning prestress carbon fiber cloth and steel |
| 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 |
| CN104100100A (en) * | 2014-07-14 | 2014-10-15 | 扬州大学 | Method for strengthening reinforced concrete girder by using slightly curved and tensioned carbon fiber plates |
| CN107630564B (en) * | 2017-09-12 | 2020-04-10 | 叶长青 | Construction method for reinforced structure of concrete beam |
| CN107630564A (en) * | 2017-09-12 | 2018-01-26 | 叶长青 | The ruggedized construction of beams of concrete |
| 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 |
| CN109469347A (en) * | 2018-10-30 | 2019-03-15 | 河北省建筑科学研究院 | A kind of "-" type end anchor applied to assembled external prestressing |
| 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 |
| CN110017034A (en) * | 2019-04-28 | 2019-07-16 | 四川大学 | A kind of beam is antifatigue to use pre-stressed carbon fiber stretching and anchoring device and its installation method |
| 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 |
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|---|---|
| CN101781936B (en) | 2012-10-03 |
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