CN216380248U - Concrete beam structure - Google Patents
Concrete beam structure Download PDFInfo
- Publication number
- CN216380248U CN216380248U CN202122828274.8U CN202122828274U CN216380248U CN 216380248 U CN216380248 U CN 216380248U CN 202122828274 U CN202122828274 U CN 202122828274U CN 216380248 U CN216380248 U CN 216380248U
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- CN
- China
- Prior art keywords
- frp
- frame structure
- cloth
- concrete
- concrete beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 239000004567 concrete Substances 0.000 title claims abstract description 29
- 239000004744 fabric Substances 0.000 claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000004576 sand Substances 0.000 description 7
- 239000013535 sea water Substances 0.000 description 7
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 239000011374 ultra-high-performance concrete Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000013505 freshwater Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a concrete beam structure, which comprises a frame structure consisting of FRP ribs and FRP plates, FRP cloth for fixing the frame structure on the outer side, and poured concrete. According to the utility model, the FRP plate is used for replacing the steel bar at the bottom, so that the contact area between the FRP cloth and the FRP plate at the bottom is increased, the stability of the whole structure is improved, the tensile force borne by the bottom of the beam is more uniform, and the whole bearing capacity of the beam is improved; use FPR cloth to carry out the slant to bond about to the atress part, the FRP cloth of slope can make the roof beam possess better shearing and destroy resistance, improves the whole bearing capacity of roof beam. The utility model has simple structure and is convenient for construction operation.
Description
Technical Field
The utility model relates to the field of concrete structures, in particular to a concrete beam structure.
Background
River sand and fresh water are used as one of raw materials of reinforced concrete structure engineering, and seawater and sea sand are used for replacing river sand and fresh water in the engineering, so that the problem of shortage of river sand and fresh water can be solved. However, the use of seawater and sea sand as the material causes a new problem due to Cl contained in seawater and sea sand-、SO4 2-The plasma has strong corrosivity to the concrete structure, can seriously affect the safety of the structure, and reduces the durability of the building, so that FRP cloth and FRP ribs with corrosion resistance and excellent tensile strength can be used for replacing reinforcing steel bars to serve as a stress framework of the reinforcing steel bars. However, due to the change of materials, the conventional reinforcing steel frame structure cannot fully exert the performance of the FRP rib to improve the safety and durability of the building.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the present invention is to provide a concrete beam structure that cannot sufficiently exert the performance of the FRP reinforcement in the conventional structure.
Therefore, the utility model adopts the following technical scheme:
the utility model provides a concrete beam structure, which comprises a frame structure consisting of FRP ribs and FRP plates, FRP cloth for fixing the frame structure on the outer side, and poured concrete.
The FRP cloth is divided into two sections which are spirally wound on the frame structure along the direction of the FRP ribs, the two sections of FRP cloth are connected after being crossed on the frame structure, and the spiral directions of the two sections of FRP cloth are opposite.
Furthermore, the frame structure is a structure with a rectangular cross section, and the two FRP ribs and the FRP plate are fixed by stirrups.
A plurality of contact positions are arranged between the FRP cloth and the frame structure, and the distance between two adjacent contact positions on the same plane is 30-50 mm.
And the contact position of the FRP cloth and the frame structure is provided with a glue layer for connecting the FRP cloth and the frame structure.
The preparation method of the concrete beam structure comprises the following steps:
(1) fixing the two FRP bars and the FRP plates by using stirrups to form a structure with a rectangular cross section, namely obtaining a frame structure;
(2) painting epoxy resin on one surface of the FRP cloth, enabling the surface painted with the epoxy resin to face inwards, spirally winding the FRP cloth on the frame structure from one end of the frame structure, and continuously spirally winding the FRP cloth on the rest frame structure in an inclined direction opposite to the previous spiral direction after the FRP cloth is crossed at the middle part of the frame structure; keeping the distance between the contact positions of two adjacent FRP cloth and the frame structure on the same plane to be 30-50 mm;
(3) pouring concrete;
(4) and covering a thin film on the surface of the concrete, and watering and maintaining to obtain the concrete beam structure.
The technical scheme of the utility model has the following advantages:
(1) the utility model uses the FRP plate to replace the steel bar at the bottom, increases the contact area between the FRP cloth and the bottom FRP plate, improves the stability of the whole structure, ensures that the bearing tension at the bottom of the beam is more uniform, and improves the whole bearing capacity of the beam.
(2) According to the utility model, the upper and lower stressed parts are obliquely bonded by using the FPR cloth, and the oblique FRP cloth can enable the beam to have better shearing damage resistance and improve the overall bearing capacity of the beam.
(3) The utility model uses the glue layer to connect the stressed components in the beam, reduces binding work and forms a stable whole among the stressed components.
(4) The utility model has simple structure and is convenient for construction operation.
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 structural view of a concrete beam structure manufactured according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a concrete beam structure according to an embodiment of the present invention.
Reference numerals:
1-FRP ribs; 2-FRP cloth; 3-FRP plate; 4-concrete.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The specific experimental procedures or conditions are not shown in the examples, and the procedures or conditions of the conventional experimental procedures described in the literature in the field can be performed, and all the reagents are commercially available standard reagents.
The following specific examples are further illustrative of the present invention, and the examples do not exemplify all the embodiments of the present invention, but only some of the embodiments are exemplified, and the specific examples are as follows:
examples
The present embodiment provides a concrete beam structure.
The concrete used in this example was UHPC (ultra high performance concrete) containing seawater, sea sand, imitation steel fibers, wherein the composition of seawater is shown in table 1 below:
table 1 seawater composition used in the examples
The parameters of the imitation steel fiber used were: the breaking strength is more than or equal to 450 MPa; density 0.91-0.98; the acid and alkali resistance (the limit tension retention rate) is more than or equal to 98.0 percent; nominal length 30-50 mm; the initial modulus is more than or equal to 3.5 Gpa.
The preparation process of UHPC is as follows:
adding 820g of sea sand and 210g of sea water into a stirrer, stirring for 2min, then adding 800g of ordinary portland cement, 250g of silica fume and 120g of quartz powder, stirring for 3min → adding 25g of polycarboxylic acid water reducing agent, and stirring for 8 min; finally, 150g of steel-like fiber is slowly scattered and stirred for 8min at the same time, and UHPC is obtained.
The FRP ribs, the FRP plates and the FRP cloth used in the embodiment are commercially available products; the FRP cloth is 3mm in thickness and 30mm in width, and the FRP ribs are 8mm in diameter; the FRP plate has a thickness of 10mm and a width of 200 mm.
The concrete beam structure obtained by the method is shown in figures 1 and 2, and the concrete beam structure is prepared by the following specific method
(1) Fixing the two FRP ribs 1 and the FRP plate 3 by using stirrups to form a structure with a rectangular cross section, namely obtaining a frame structure;
(2) painting epoxy resin on one surface of the FRP cloth 2, enabling the surface painted with the epoxy resin to face inwards, spirally winding the FRP cloth 2 on the frame structure from one end of the frame structure, and continuously spirally winding the FRP cloth 2 on the rest frame structure in an inclined direction opposite to the previous spiral direction after the FRP cloth 2 is crossed at the middle part of the frame structure; keeping the distance between the contact positions of two adjacent FRP cloth 2 and the frame structure on the same plane to be 50 mm;
(3) pouring concrete 4;
(4) and covering a thin film on the surface of the concrete 4, and watering and curing for 15 days to obtain the concrete beam structure.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.
Claims (4)
1. A concrete beam structure is characterized by comprising a frame structure consisting of FRP ribs and FRP plates, FRP cloth for fixing the frame structure on the outer side, and poured concrete;
the FRP cloth is divided into two sections which are spirally wound on the frame structure along the direction of the FRP ribs, the two sections of FRP cloth are connected after being crossed on the frame structure, and the spiral directions of the two sections of FRP cloth are opposite.
2. A concrete beam structure according to claim 1, wherein the frame structure is a structure having a rectangular cross section formed by two FRP bars and two FRP plates fixed by stirrups.
3. A concrete beam structure according to claim 2, wherein there are a plurality of contact positions between the FRP cloth and the frame structure, and a distance between adjacent two of the contact positions on the same plane is 30-50 mm.
4. A concrete beam structure according to claim 3, wherein a bonding layer is provided at a contact position of the FRP cloth and the frame structure for connecting the FRP cloth and the frame structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122828274.8U CN216380248U (en) | 2021-11-17 | 2021-11-17 | Concrete beam structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122828274.8U CN216380248U (en) | 2021-11-17 | 2021-11-17 | Concrete beam structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216380248U true CN216380248U (en) | 2022-04-26 |
Family
ID=81252786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122828274.8U Expired - Fee Related CN216380248U (en) | 2021-11-17 | 2021-11-17 | Concrete beam structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216380248U (en) |
-
2021
- 2021-11-17 CN CN202122828274.8U patent/CN216380248U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220426 |