CN219825834U - Reinforced concrete beam reinforced by CFPR-ultra-high performance concrete - Google Patents
Reinforced concrete beam reinforced by CFPR-ultra-high performance concrete Download PDFInfo
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- CN219825834U CN219825834U CN202321266512.3U CN202321266512U CN219825834U CN 219825834 U CN219825834 U CN 219825834U CN 202321266512 U CN202321266512 U CN 202321266512U CN 219825834 U CN219825834 U CN 219825834U
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- concrete
- reinforcing layer
- reinforced
- concrete beam
- cfrp
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 14
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 13
- 239000004567 concrete Substances 0.000 claims abstract description 62
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 45
- 239000004918 carbon fiber reinforced polymer Substances 0.000 claims abstract description 26
- 230000002787 reinforcement Effects 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 6
- 238000010008 shearing Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Rod-Shaped Construction Members (AREA)
Abstract
The utility model relates to a reinforced concrete beam reinforced by CFPR-ultra-high performance concrete, which comprises a concrete beam body, wherein the bottom of the concrete beam body is connected with a concrete reinforcing layer, the bottom of the concrete reinforcing layer is connected with a CFRP reinforcing layer, and the concrete beam body, the concrete reinforcing layer and the CFRP reinforcing layer are connected through a plurality of studs and nuts. The utility model has higher compressive strength, higher tensile bending strength and better ductility, can greatly improve the bending bearing capacity and shearing bearing capacity of the beam member, prolongs the service life of the structure and improves the durability of the member.
Description
Technical Field
The utility model relates to the technical field of civil engineering, in particular to a reinforced concrete beam reinforced by CFPR-ultra-high-performance concrete.
Background
The concrete beam is easy to crack and peel off under the long-term load and environmental effect, so that the bearing capacity of the concrete beam is reduced sharply. Therefore, the old concrete beam always has problems of insufficient rigidity and bearing capacity. The reinforcement of concrete beams is an economical and efficient solution to the above-mentioned problems.
The most common methods for reinforcing the concrete beam are methods of increasing the sectional area, pasting reinforcing materials, strengthening prestress and the like, but the methods have certain limitations, for example, CFPR-concrete composite reinforcement technology requires a bracket to fix CFPR and concreting, and the site construction difficulty is high. The common concrete has the defects of low tensile strength, poor bonding performance with the old concrete and the like in the reinforcing aspect. Therefore, there is a need for improvements in the prior art for reinforcement that provide for more efficient reinforcement of concrete beams.
Disclosure of Invention
The utility model aims to solve the defects of the prior art and provides a reinforced concrete beam reinforced by CFPR-ultra-high performance concrete.
The utility model adopts the following technical scheme to realize the aim: the reinforced concrete beam comprises a concrete beam body, wherein the bottom of the concrete beam body is connected with a concrete reinforcing layer, the bottom of the concrete reinforcing layer is connected with a CFRP reinforcing layer, and the concrete beam body, the concrete reinforcing layer and the CFRP reinforcing layer are connected through a plurality of studs and nuts.
Further, the studs and nuts are respectively arranged at the two sides and the middle of the concrete beam body, the concrete reinforcing layer and the CFRP reinforcing layer.
Further, an interfacial agent is coated between the concrete reinforcing layer and the CFRP reinforcing layer, and the interfacial agent is epoxy resin.
Further, the depth of the stud implanted into the concrete beam body is larger than 8cm, and the length of the stud extending out of the CFRP reinforcement layer is larger than the sum of the thickness of the concrete reinforcement layer and the thickness of the CFRP reinforcement layer.
Further, the CFRP reinforcing layer is a carbon fiber reinforced matrix composite layer.
Further, the concrete reinforcing layer is ultra-high performance concrete.
The beneficial effects of the utility model are as follows: the utility model has higher compressive strength, higher tensile bending strength and better ductility, can greatly improve the bending bearing capacity and shearing bearing capacity of the beam member, prolongs the service life of the structure and improves the durability of the member.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is an overall schematic of the present utility model;
FIG. 3 is a cross-sectional view of the present utility model;
in the figure: 1-a concrete beam body; 2-a concrete reinforcing layer; a 3-CFRP reinforcing layer; 4-stud; 5-nuts;
the drawings in the present utility model are schematic, and their sizes do not represent actual dimensions;
the embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1 to 3, a reinforced concrete beam reinforced by CFPR-ultra-high performance concrete comprises a concrete beam body 1, wherein the bottom of the concrete beam body 1 is connected with a concrete reinforcing layer 2, the bottom of the concrete reinforcing layer 2 is connected with a CFRP reinforcing layer 3, and the concrete beam body 1, the concrete reinforcing layer 2 and the CFRP reinforcing layer 3 are connected through a plurality of studs 4 and nuts 5. The studs 4 and nuts 5 are respectively arranged at the two sides and the middle of the concrete beam body 1, the concrete reinforcement layer 2 and the CFRP reinforcement layer 3. An interfacial agent is coated between the concrete reinforcing layer 2 and the CFRP reinforcing layer 3, the interfacial agent is epoxy resin, and the bonding strength of the epoxy resin is more than 3MPa. The depth of the stud 4 implanted into the concrete beam body 1 is more than 8cm, and the length of the stud 4 extending out of the CFRP reinforcement layer 3 is more than the sum of the thickness of the concrete reinforcement layer 2 and the thickness of the CFRP reinforcement layer 3. The CFRP reinforcing layer 3 is a carbon fiber reinforced matrix composite layer, and has tensile strength of more than 3400MPa, so that the concrete beam body 1 can be further improved to resist invasion of external harmful substances, and the problems of durability and safety caused by load and external environment to the concrete beam body 1 are greatly improved. The concrete reinforcing layer 2 is ultra-high performance concrete (UHPC), the compressive strength is more than 150MPa, the bending strength is more than 25MPa, the volume fraction of the contained steel fibers is more than or equal to 3%, the concrete reinforcing layer has higher compressive strength, higher tensile bending strength and more excellent ductility, the compactness of particles enables the concrete beam body 1 to have better durability, and meanwhile, the thickness is smaller, and the influence on the dead weight of the component is smaller.
The epoxy resin is coated on the surfaces of the concrete reinforcing layer 2 and the CFRP reinforcing layer 3 to be adhered by a roller coating mode. Before the epoxy resin is applied, the concrete reinforcing layer 2 is rough-ground using sandpaper or a grinding wheel to ensure that the concrete reinforcing layer 2 and the CFRP reinforcing layer 3 can be well bonded. Three groups of six rows of studs 4 are implanted into the bottom surface of the concrete beam body 1, the number of each row of studs 4 is 2, the three groups of studs 4 are respectively distributed at two ends and the middle position of the concrete beam body 1, and the tail end of each stud 4 is fastened by a nut 5.
While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the utility model is not limited to the above embodiments, but is intended to cover various modifications, either made by the method concepts and technical solutions of the utility model, or applied directly to other applications without modification, within the scope of the utility model.
Claims (6)
1. The reinforced concrete beam is characterized by comprising a concrete beam body (1), wherein a concrete reinforcing layer (2) is connected to the bottom of the concrete beam body (1), a CFRP reinforcing layer (3) is connected to the bottom of the concrete reinforcing layer (2), and the concrete beam body (1), the concrete reinforcing layer (2) and the CFRP reinforcing layer (3) are connected through a plurality of studs (4) and nuts (5).
2. The reinforced concrete beam reinforced by CFPR-ultra-high performance concrete according to claim 1, wherein the stud (4) and the nut (5) are respectively arranged at both sides and the middle of the concrete beam body (1), the concrete reinforcing layer (2) and the CFRP reinforcing layer (3).
3. The reinforced concrete beam reinforced by CFPR-ultra-high performance concrete according to claim 2, wherein an interfacial agent is coated between the concrete reinforcing layer (2) and the CFRP reinforcing layer (3), and the interfacial agent is epoxy resin.
4. A reinforced concrete beam reinforced by CFPR-ultra-high performance concrete according to claim 3, wherein the depth of the stud (4) implanted into the concrete beam body (1) is more than 8cm, and the length of the stud (4) extending out of the CFRP reinforcement layer (3) is more than the sum of the thickness of the concrete reinforcement layer (2) and the thickness of the CFRP reinforcement layer (3).
5. A reinforced concrete beam reinforced by CFPR-ultra high performance concrete according to claim 4, wherein the CFRP reinforcement layer (3) is a carbon fiber reinforced matrix composite layer.
6. A reinforced concrete beam reinforced by CFPR-ultra high performance concrete according to claim 5, wherein the concrete reinforcing layer (2) is ultra high performance concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321266512.3U CN219825834U (en) | 2023-05-24 | 2023-05-24 | Reinforced concrete beam reinforced by CFPR-ultra-high performance concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321266512.3U CN219825834U (en) | 2023-05-24 | 2023-05-24 | Reinforced concrete beam reinforced by CFPR-ultra-high performance concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219825834U true CN219825834U (en) | 2023-10-13 |
Family
ID=88285789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321266512.3U Active CN219825834U (en) | 2023-05-24 | 2023-05-24 | Reinforced concrete beam reinforced by CFPR-ultra-high performance concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219825834U (en) |
-
2023
- 2023-05-24 CN CN202321266512.3U patent/CN219825834U/en active Active
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