CN114481868A - Beam member prestress bending-resistant reinforcing structure and method - Google Patents
Beam member prestress bending-resistant reinforcing structure and method Download PDFInfo
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- CN114481868A CN114481868A CN202210171563.1A CN202210171563A CN114481868A CN 114481868 A CN114481868 A CN 114481868A CN 202210171563 A CN202210171563 A CN 202210171563A CN 114481868 A CN114481868 A CN 114481868A
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
Abstract
The invention provides a beam member prestress bending-resistant reinforcing structure and a method, wherein the structure comprises: an SMA member in a pre-deformed state for receiving thermal excitation; a first fixing portion fixed to one end of the SMA member; a second fixing portion fixed to the other end of the SMA member; a first adhesive area for fixing the first fixing portion with the beam member; a second adhesive area for fixing the second fixing portion with the beam member; a heating device disposed between the SMA member and the beam member for providing thermal excitation to the SMA member; the filling layers are arranged on two sides of the middle position of the SMA component and have the same thickness as the first fixing part and the second fixing part; and the packaging layer is arranged on one side of the SMA component far away from the beam-type component and is used for packaging the first fixing part, the second fixing part and the filling layer. The method adopts the structure. The method can be widely applied to the beam member crack repairing and reinforcing engineering.
Description
Technical Field
The invention relates to the technical field of beam-type components, in particular to a prestressed bending-resistant reinforcing structure and method for a beam-type component.
Background
The bridge is one of beam type components, is an important transportation junction, and along with the increase of the service life of bridge engineering, the problems of insufficient rigidity, reduced bearing capacity and the like easily occur. In the bridge engineering construction, an effective reinforcing construction technology needs to be selected, wherein the reinforcing effect of the external prestress technology is good. However, the conventional in vitro prestressing technique has the following disadvantages: 1. the prestressed cable which is a key material and is applied to the in-vitro prestressed technology is easy to rust under the erosion of rainwater in the natural environment; 2. stress generated by anchoring the bridge and a bridge structure are easy to generate stress concentration, and hidden danger is caused to the stability of the bridge; 3. the anchorage device and the clamping pieces are more in application quantity in the reinforcing operation, and due to the influence of insufficient tension of the external cable, the strength of the steel strand cannot be fully exerted, so that the construction of the anchorage device and the clamping pieces is influenced, and the construction difficulty of the external prestress technology is increased.
The composite material has the advantages of light weight, high strength, corrosion resistance and the like, and is gradually used for an external prestress reinforcement technology in recent years, and a composite material prestress tension anchoring method and a composite material prestress tension anchoring system based on the shape memory alloy are provided, but in a similar method, the anchoring system is connected with the beam type member through bolts, certain damage can be caused to the beam type member, meanwhile, stress concentration is easy to occur at the bolts and the beam type member, and a new structural problem is caused to the beam type member.
Disclosure of Invention
In order to solve the problems of stress concentration generated by the traditional external prestress reinforcement technology and the adoption of a composite material anchoring system for reinforcement in recent years, the invention aims to provide a prestress bending-resistant reinforcement structure and a method for a beam-type member, which can prevent the generation of a new structure problem of the beam-type member connected by bolts while reducing the construction difficulty of the external prestress reinforcement technology and improving the efficiency.
The technical scheme adopted by the invention is as follows:
a beam member prestressed moment-buckling reinforced structure, comprising: the packaging structure comprises an SMA component, a first fixing part, a second fixing part, a first bonding area, a second bonding area, a heating device, a filling layer and a packaging layer; the SMA member is in a pre-deformed state for receiving thermal excitation; the first fixing part is fixed with one end of the SMA member; the second fixing part is fixed with the other end of the SMA member; the first bonding area is used for fixing the first fixing part and the beam-type component; the second bonding area is used for fixing the second fixing part and the beam-type component; the heating device is arranged between the SMA member and the beam member for providing thermal excitation to the SMA member; the filling layers are arranged on two sides of the middle position of the SMA component and are the same as the first fixing part and the second fixing part in thickness; the packaging layer is arranged on one side, far away from the beam-type component, of the SMA component and used for packaging the first fixing portion, the second fixing portion and the filling layer.
Preferably, still include bonding region filling layer, bonding region filling layer sets up first bonding region, second bonding region with the space between the filling layer.
Preferably, the thickness of the bond region filling layer is the same as the thickness of the first bond region and the thickness of the second bond region.
Preferably, the first fixing part and the second fixing part are made of CFRP components.
Preferably, the material adopted by the packaging layer is a CFRP component.
Preferably, the material adopted by the first bonding area and the second bonding area is epoxy resin structural adhesive.
Preferably, the material adopted by the filling layer is epoxy resin structural adhesive.
Preferably, the bonding area filling layer is made of epoxy resin structural adhesive.
The method for reinforcing the beam member by prestress and bending resistance is characterized by comprising the following steps of:
s1, pre-stretching the SMA member to a required strain ratio, cutting the SMA member to a required length, and straightening the SMA member by using a universal testing machine;
s2, respectively anchoring the first fixing part and the second fixing part at two ends of the SMA component;
s3, arranging a filling layer in the middle of the SMA member to seal the SMA member, wherein the thickness of the filling layer is the same as that of the first fixing part and that of the second fixing part;
s4, bonding the beam-type component and the first fixing part by adopting a first bonding area, and bonding the beam-type component and the second fixing part by adopting a second bonding area;
and S5, arranging an encapsulation layer on the sides of the first fixing parts, the filling layer and the second fixing parts, which are far away from the beam-type component.
Preferably, in S4, bonding is performed between the beam member and the filler layer using a bond pad filler layer.
Compared with the prior art, the invention has the beneficial effects that:
1. the first fixing part and the second fixing part are anchored at the two ends of the SMA member, large-scale tensioning equipment and end anchorage devices are not needed, the occupied space is small, the construction efficiency is high, the operation is simple and convenient, the waste of resources such as manpower and time is reduced, and no or low requirement is imposed on the clearance limitation of the beam-type member;
2. the beam type member is respectively bonded with the first fixing part and the second fixing part by the first bonding area and the second bonding area, so that the problem of stress concentration caused by the application of a roof bolt reinforcing method is avoided, and the beam type member crack repairing and reinforcing method can be widely applied to the beam type member crack repairing and reinforcing engineering.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic top view of a prestressed buckling-restrained reinforcement structure of a beam member according to an embodiment of the present invention;
FIG. 2 is a schematic view of the first and second fastening portions anchored to an SMA member in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of the assembly of a heating device and guard with an SMA member according to an embodiment of the invention.
Description of reference numerals:
1: a first fixed part; 2: a second fixed part; 3: an SMA member; 4: a protection part; 5: a heating device; 6: a filling layer; 7: a first adhesive region; 8: a second adhesive region; 9: a bonding area filling layer; 10: a beam member; 11: and (7) packaging the layer.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, the present invention provides a beam member prestressed bending-resistant reinforcing structure, including: the SMA member 3, the first fixing portion 1, the second fixing portion 2, the first bonding area 7, the second bonding area 8, the heating device 5, the filling layer 6 and the packaging layer 11.
The SMA member 3 is in a pre-deformed state for receiving thermal excitation. It should be noted that sma (shape memory alloys) is a shape memory alloy for providing a prestress. The SMA member 3 is made of SMA wire or SMA plate.
The first fixing portion 1 is fixed to one end of the SMA member 3, and the second fixing portion 2 is fixed to the other end of the SMA member 3. The first fixing part 1 and the second fixing part 2 both adopt CFRP components, and are anchored with the SMA component 3 in a mode of injecting epoxy resin structural adhesive. CFRP (Carbon fiber-reinforced Polymer) is a Carbon fiber reinforced matrix composite material for preventing the SMA member 3 from retracting, enabling the SMA member 3 to continuously provide a prestress and transmit the prestress. The CFRP component is CFRP cloth or CFRP grid.
The first adhesive region 7 is used to fix the first fixing portion 1 and the beam member 10, and the second adhesive region 8 is used to fix the second fixing portion 2 and the beam member 10.
A heating device 5 is arranged between the SMA member 3 and the beam member 10 for providing thermal excitation to the SMA member 3. The heating means 5 is preferably a thermocouple to allow control of the magnitude of the pre-stress by accurately controlling the temperature of the heat source to the SMA element 3. The number and spacing of thermocouples is specific to the field situation. Before use, the thermocouple needs to be protected by a fireproof adhesive tape.
In some embodiments, the protection portion 4 is further included, and the protection portion 4 is disposed on a side of the first fixing portion 1 close to the second fixing portion 2 and a side of the second fixing portion 2 close to the first fixing portion 1. The protective part 4 is preferably made of glass fiber to prevent the heat source from affecting the stability of the epoxy resin structural adhesive of the first and second fixing parts 1 and 2.
After the heating device 5 has prestressed the SMA member 3, the thermocouple, the flameproof adhesive tape and the protective portion 4 are removed.
The filling layers 6 are arranged on two sides of the middle position of the SMA member 3, and the thickness of the filling layers 6 is the same as that of the first fixing part 1 and the second fixing part 2.
The packaging layer 11 is arranged on one side of the SMA member 3 far away from the beam-type member 10 and is used for packaging the first fixing part 1, the second fixing part 2 and the bottom of the filling layer 6. Preferably, the encapsulation layer 11 also employs a CFRP member.
In some embodiments, further comprising an adhesive region filling layer 9, the adhesive region filling layer 9 is disposed in the gap between the first adhesive region 7, the second adhesive region 8 and the filling layer 6. The thickness of the adhesive region filling layer 9 is the same as the thickness of the first adhesive region 7 and the thickness of the second adhesive region 8.
In some embodiments, the materials used for the first bonding area 7, the second bonding area 8, the filling layer 6 and the bonding area filling layer 9 are epoxy structural adhesives.
The invention also provides a beam member prestress bending-resistant reinforcing method using the structure, which can continuously generate prestress to reinforce the beam member 10, and the method comprises the following steps:
s1, pre-stretching the SMA member 3 to a required strain ratio in order to apply corresponding pre-stress to the beam member 10, cutting the SMA member to a required length, and straightening the SMA member 3 by using a universal testing machine;
s2, respectively anchoring the first fixing part 1 and the second fixing part 2 at two ends of the SMA component 3;
s3, disposing a filling layer 6 in the middle of the SMA member 3 to seal the SMA member 3, wherein the thickness of the filling layer 6 is the same as the thickness of the first fixing portion 1 and the thickness of the second fixing portion 2;
s4, bonding the beam member 10 and the first fixing portion 1 by using the first bonding area 7, and bonding the beam member 10 and the second fixing portion 2 by using the second bonding area 8;
and S5, arranging the packaging layer 11 on the side, away from the beam-type member 10, of the first fixing part 1, the filling layer 6 and the second fixing part 2.
At S4, the beam member 10 and the filler layer 6 are bonded together using the bonding-region filler layer 9.
The specific manufacturing process of the invention is as follows:
before the SMA member 3 is manufactured, epoxy resin impregnated glue is needed to be used for preprocessing the CFRP member, after the first fixing part 1 and the second fixing part 2 are preprocessed, alcohol is used for wiping the SMA member 3 and the CFRP member, pollutants such as dust, stains and the like are removed, then a cloth-based adhesive tape is used for adhering and protecting a non-adhering surface of the CFRP member, the non-adhering surface is prevented from being polluted by the glue in the adhering process, two ends of the SMA member 3 are positioned and placed on corresponding positions of the CFRP member, and the length of the SMA member 3 should exceed the edges of the CFRP member at the two ends.
The A, B component of the epoxy resin structural adhesive is as follows: 1, fully stirring the mixture, adding 1% of glass beads with corresponding diameters by mass of colloid into the colloid in the stirring process for ensuring the thickness of a glue layer when a test piece is molded, coating epoxy resin structural glue on the bonding surface of the CFRP component, ensuring the uniformity as far as possible in the coating process, and ensuring that the thickness of the coated glue layer is slightly larger than the required thickness, namely the glue layer can completely cover the SMA component 3.
As shown in fig. 2, the bonding surface of another CFRP member with the same size is placed on the epoxy resin structural adhesive layer, and is pressed by force until the excess structural adhesive overflows, the excess structural adhesive is cleaned, and is placed until the adhesive layer is basically hardened, the two end areas where the SMA member 3 is anchored through the CFRP member and the epoxy resin structural adhesive layer are respectively defined as a first fixing part 1 and a second fixing part 2, and are placed for 7 days until the adhesive layer is completely hardened, and the SMA-CFRP patch is manufactured.
Marking the pasting area by using a marker, and pasting the non-reinforced area of the beam-type component 10 by using cloth-based adhesive tape to prevent colloid from polluting the non-reinforced area sheet in the pasting process; the adhered area is then wiped with alcohol to remove contaminants from the surface of the beam member 10.
Pressing by a small electronic scale according to the following weight ratio of 2: 1, weighing A, B components of a proper amount of epoxy resin structural adhesive, stirring at a low speed by using an iron bar until the components are uniformly mixed, smearing the uniformly mixed epoxy resin structural adhesive on an SMA-CFRP patch to-be-pasted area on the surface of the beam member 10 by using a brush, and selecting the thickness according to actual requirements; then, the first fixing part 1 and the second fixing part 2 of the SMA-CFRP patch are pasted at the coating position of the adhesive layer and pressed by force, meanwhile, colloid overflowing in the pressing process is removed, the area between the first fixing part 1 and the second fixing part 2 and the area to be pasted of the SMA-CFRP patch on the surface of the beam type component 10 is defined as a first bonding area 7 and a second bonding area 8, then the SMA-CFRP patch is pressed and fixed by a heavy object, and the SMA-CFRP patch stands for 7 days to wait for the curing of the adhesive layer.
After the epoxy resin structural adhesive is solidified, arranging a thermocouple between the SMA member 3 and the beam member 10, and simultaneously using a fireproof adhesive tape for protection to prevent temperature measurement deviation caused by direct heating of a heat source to the thermocouple; glass fiber covering protection is used at the boundary position of the SMA member 3 and the first fixing part 1 and the second fixing part 2, according to experience, when the distance from a heat source exceeds 2cm, the SMA member 3 can hardly conduct heat, therefore, the length of a glass fiber covering area is larger than 2cm, and the phenomenon that the temperature of a glue layer is increased in the process of heating the SMA member 3 to cause the anchoring performance to be failed is prevented. After the preparation is completed, the SMA member 3 is thermally excited by using a heat gun, heating is stopped after the SMA member 3 is heated to 160 ℃, and the SMA member is naturally cooled to room temperature, so that a schematic diagram of applying prestress is obtained as shown in fig. 3.
Removing the glass fiber and the thermocouple after the SMA member 3 is cooled to room temperature, filling the first fixing part 1 and the second fixing part 2 and the SMA-CFRP member 3 between the first bonding area 7 and the second bonding area 8 with epoxy resin structural adhesive, respectively defining the adhesive between the two end fixing parts and the two end bonding areas as a filling layer 6 and a bonding area filling layer 9, wherein the thickness of the filling layer 6 is the same as that of the fixing parts at the two ends, the thickness of the bonding area filling layer 9 is the same as that of the bonding areas at the two ends, covering a PVC plastic plate on the bonding area filling layer, pressurizing and removing the overflowing adhesive by a heavy object, weighing a proper amount of epoxy resin impregnating adhesive and uniformly stirring after standing for 24 hours, coating impregnating adhesive on the bottoms of the first fixing part 1 and the second fixing part 2 and the filling layer 6 by a brush and pasting the CFRP member, defining as a packaging layer 11, scraping the bubbles in the overflowing adhesive and the adhesive layer by a scraper, standing for 7 days until the adhesive layer is solidified, the die package is completed and a schematic view of the package after pre-stress is applied is shown in fig. 1.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A beam member prestressed bending-resistant reinforcing structure, comprising:
an SMA member (3), the SMA member (3) being in a pre-deformed state for receiving thermal excitation;
a first fixing portion (1) fixed to one end of the SMA member (3);
a second fixing portion (2) fixed to the other end of the SMA member (3);
a first adhesive area (7) for fixing the first fixing portion (1) with a beam member (10);
a second adhesive area (8) for fixing the second fixing portion (2) with the beam member (10);
a heating device (5) arranged between the SMA member (3) and the beam member (10) for providing thermal excitation to the SMA member (3);
filling layers (6) which are arranged on two sides of the middle position of the SMA component (3) and have the same thickness as the first fixing part (1) and the second fixing part (2);
and the packaging layer (11) is arranged on one side, far away from the beam-type component (10), of the SMA component (3) and is used for packaging the first fixing part (1), the second fixing part (2) and the filling layer (6).
2. The beam member prestressed moment-hardening structure according to claim 1, further comprising an adhesive area filler layer (9), said adhesive area filler layer (9) being disposed in a gap between said first adhesive area (7), said second adhesive area (8) and said filler layer (6).
3. The beam member prestressed bending-resistant reinforcing structure according to claim 2, wherein the thickness of said bonding area filling layer (9) is the same as the thickness of said first bonding area (7) and the thickness of said second bonding area (8).
4. The beam member prestressed moment-buckling-reinforced structure according to claim 1, characterized in that the material used for said first fixing portion (1) and said second fixing portion (2) is a CFRP member.
5. The beam member prestressed moment-hardening structure according to claim 1, characterized in that the material used for said encapsulation layer (11) is a CFRP member.
6. The beam member prestressed moment-buckling reinforced structure of claim 1, wherein said first bonding area (7) and said second bonding area (8) are made of epoxy structural adhesive.
7. The beam member prestressed moment-buckling reinforcing structure according to claim 1, wherein said filling layer (6) is made of an epoxy structural adhesive.
8. The beam member prestressed moment-buckling-reinforced structure according to claim 2, wherein said bonding area filling layer (9) is made of an epoxy structural adhesive.
9. A beam member prestress buckling-reinforcing method using the beam member prestress buckling-reinforcing structure according to any one of claims 1 to 8, characterized by comprising the steps of:
s1, pre-stretching the SMA member (3) to a required strain ratio, cutting the SMA member to a required length, and straightening the SMA member (3) by using a universal testing machine;
s2, respectively anchoring the first fixing part (1) and the second fixing part (2) at two ends of the SMA component (3);
s3, arranging a filling layer (6) in the middle of the SMA member (3) to seal the SMA member (3), wherein the thickness of the filling layer (6) is the same as that of the first fixing part (1) and that of the second fixing part (2);
s4, bonding the beam-type component (10) and the first fixing part (1) by adopting a first bonding area (7), and bonding the beam-type component (10) and the second fixing part (2) by adopting a second bonding area (8);
s5, an encapsulation layer (11) is arranged on the side, away from the beam-type member (10), of the first fixing portion (1), the filling layer (6) and the second fixing portion (2).
10. The beam member pre-stress buckling-reinforcing method according to claim 9, wherein bonding is performed between said beam member (10) and said filling layer (6) using a bonding-zone filling layer (9) at S4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210171563.1A CN114481868A (en) | 2022-02-24 | 2022-02-24 | Beam member prestress bending-resistant reinforcing structure and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210171563.1A CN114481868A (en) | 2022-02-24 | 2022-02-24 | Beam member prestress bending-resistant reinforcing structure and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115492416A (en) * | 2022-09-29 | 2022-12-20 | 福州大学 | FRP-SMA composite sheet and reinforcing method thereof |
| CN115653338A (en) * | 2022-10-14 | 2023-01-31 | 重庆科技学院 | CFRP panel-SMA silk combined anchorage device |
| CN115653338B (en) * | 2022-10-14 | 2024-05-17 | 重庆科技学院 | Combined anchorage device of CFRP plate-SMA wire composite material |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201507067U (en) * | 2009-10-13 | 2010-06-16 | 华侨大学 | Novel combined stone beam |
| JP2012052319A (en) * | 2010-08-31 | 2012-03-15 | Kurosawa Construction Co Ltd | Structure for reinforcing bridge girder |
| CN102966246A (en) * | 2012-12-11 | 2013-03-13 | 上海市建筑科学研究院(集团)有限公司 | Method for sticking carbon fiber sheet to reinforce prestressed concrete core slab |
| CN107035203A (en) * | 2017-06-07 | 2017-08-11 | 沈阳建筑大学 | A kind of SMA energy consumers prestressing without bondn system |
| CN113481880A (en) * | 2021-06-22 | 2021-10-08 | 广州大学 | Beam type member prestress reinforcing device, reinforcing method and reinforcing system |
| CN113914652A (en) * | 2021-11-08 | 2022-01-11 | 河南郑大建筑材料有限公司 | Prestressed carbon plate-ECC combined reinforced concrete structure and construction method |
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2022
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201507067U (en) * | 2009-10-13 | 2010-06-16 | 华侨大学 | Novel combined stone beam |
| JP2012052319A (en) * | 2010-08-31 | 2012-03-15 | Kurosawa Construction Co Ltd | Structure for reinforcing bridge girder |
| CN102966246A (en) * | 2012-12-11 | 2013-03-13 | 上海市建筑科学研究院(集团)有限公司 | Method for sticking carbon fiber sheet to reinforce prestressed concrete core slab |
| CN107035203A (en) * | 2017-06-07 | 2017-08-11 | 沈阳建筑大学 | A kind of SMA energy consumers prestressing without bondn system |
| CN113481880A (en) * | 2021-06-22 | 2021-10-08 | 广州大学 | Beam type member prestress reinforcing device, reinforcing method and reinforcing system |
| CN113914652A (en) * | 2021-11-08 | 2022-01-11 | 河南郑大建筑材料有限公司 | Prestressed carbon plate-ECC combined reinforced concrete structure and construction method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115492416A (en) * | 2022-09-29 | 2022-12-20 | 福州大学 | FRP-SMA composite sheet and reinforcing method thereof |
| CN115653338A (en) * | 2022-10-14 | 2023-01-31 | 重庆科技学院 | CFRP panel-SMA silk combined anchorage device |
| CN115653338B (en) * | 2022-10-14 | 2024-05-17 | 重庆科技学院 | Combined anchorage device of CFRP plate-SMA wire composite material |
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Application publication date: 20220513 |