CN212336519U - Reinforced concrete beam with composite longitudinal bars and winding grid stirrups - Google Patents
Reinforced concrete beam with composite longitudinal bars and winding grid stirrups Download PDFInfo
- Publication number
- CN212336519U CN212336519U CN202020838606.3U CN202020838606U CN212336519U CN 212336519 U CN212336519 U CN 212336519U CN 202020838606 U CN202020838606 U CN 202020838606U CN 212336519 U CN212336519 U CN 212336519U
- Authority
- CN
- China
- Prior art keywords
- frp
- grid
- stirrup
- concrete beam
- longitudinal
- 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.)
- Active
Links
Images
Landscapes
- Reinforcement Elements For Buildings (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The utility model discloses a composite longitudinal bar-winding grid stirrup reinforced concrete beam, the concrete beam main body of which comprises a concrete part and a concrete internal framework, the concrete internal framework comprises a longitudinal bar component, a longitudinal bar positioning component and a grid stirrup component, the longitudinal bar component comprises four FRP composite longitudinal bars, the longitudinal bar positioning component comprises at least two longitudinal bar positioning rectangular stirrups, and each FRP composite longitudinal bar is bound and fixed by the longitudinal bar positioning rectangular stirrups respectively; the grid stirrup component comprises at least two FRP composite material winding grid stirrups, each FRP composite material winding grid stirrup is formed by winding an FRP grid on the periphery of the longitudinal reinforcement component respectively, the FRP grid is formed by weaving FRP reinforcement materials, and each FRP composite material winding grid stirrup is integrally bonded with each FRP composite material longitudinal reinforcement through high-strength impregnating adhesive. The utility model discloses a reinforced concrete beam of longitudinal reinforcement-winding net stirrup of composite material has construction convenience, the durability is good, mechanical properties is excellent advantage.
Description
Technical Field
The utility model relates to a building engineering technical field especially relates to a muscle-winding net stirrup reinforcing concrete beam is indulged to combined material.
Background
In a reinforced concrete structure, the stirrups play a series of roles of shearing resistance, torsion resistance, crack resistance, main reinforcement fixation, longitudinal reinforcement buckling prevention, core concrete restraint and the like. Fiber Reinforced Polymers (FRP) is a novel material with the advantages of light weight, high strength, corrosion resistance and the like, and has wide application space in the fields of aviation, ships and engineering; the light high-strength fiber reinforced composite material molding reinforcement material is used as the stirrup, so that the performance of the stirrup can be greatly improved, and the performance of the reinforced concrete member with the FRP is improved; compared with the traditional steel stirrup, the FRP stirrup has the advantages of excellent corrosion resistance, high tensile strength, light weight and the like, and is particularly suitable for concrete structures in severe environments such as bridges, hydraulic engineering and the like.
However, the FRP bars have low shear strength and are prone to bending and shear failure; for the FRP stirrups, the performance degradation of the FRP reinforcements is obvious at the stirrup bending position, and the adverse effect can be brought to the shearing resistance of the beam; through a series of analyses to the FRP stirrup, the FRP stirrup has the following problems, specifically:
1. the FRP reinforcement has low elastic modulus, and under the same load condition, the FRP stirrup generates larger strain than the steel stirrup, so that the beam member has overlarge deformation;
2. the FRP ribs have low shear strength and are easy to bend and shear damage, and the performance of the bending area of the FRP stirrup is obviously degraded;
3. when the FRP stirrups bear large load for a long time in a severe environment, the FRP stirrups are aged and creep, and the working performance of the concrete beam component is reduced along with the continuous development of the damage of the FRP stirrups;
4. the FRP material has large difference of longitudinal and transverse thermal expansion coefficients, and the FRP stirrups have large longitudinal and transverse deformation difference under the action of temperature difference load, thereby generating adverse effect on the performance of the FRP stirrups and reducing the shearing resistance of the whole concrete member.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a muscle-winding net stirrup reinforced concrete beam is indulged to the combined material to prior art's not enough, this combined material indulges muscle-winding net stirrup reinforced concrete beam construction convenience, durability good, mechanical properties is excellent.
In order to achieve the above purpose, the present invention is achieved by the following technical solutions.
A composite longitudinal bar-winding grid stirrup reinforced concrete beam comprises a concrete beam main body, wherein the concrete beam main body comprises a concrete part and a concrete internal framework positioned inside the concrete part, and the concrete part and the concrete internal framework are poured into an integral structure;
the concrete internal framework comprises a longitudinal bar component, a longitudinal bar positioning component and a grid stirrup component, wherein the longitudinal bar component comprises four FRP composite longitudinal bars which are arranged at intervals and respectively extend along the longitudinal direction of the concrete beam main body; the grid stirrup component comprises at least two FRP composite material winding grid stirrups which are sequentially arranged along the concrete beam main body at intervals in the longitudinal direction, each FRP composite material winding grid stirrup is formed by winding an FRP grid on the periphery of the longitudinal reinforcement component, the FRP grid is a grid structure formed by weaving the FRP reinforcement material by adopting a fiber bundle weaving process, and each FRP composite material winding grid stirrup is integrally bonded with each FRP composite material longitudinal reinforcement through high-strength impregnating compound.
The FRP composite material winding grid stirrup is formed by winding the FRP grid on at least two layers of the periphery of the longitudinal bar component.
And the FRP composite material is wound on the vertical FRP ribs in the grid stirrups and aligned.
The FRP composite material is wound on the vertical FRP ribs in the grid stirrups and is longitudinally and equidistantly arranged along the concrete beam main body, and each vertical FRP rib is respectively vertical to the longitudinal direction of the concrete beam main body.
The vertical FRP ribs in the FRP composite material winding grid stirrups are arranged along the longitudinal variable pitch of the concrete beam main body, and each vertical FRP rib extends obliquely.
The longitudinal rib positioning rectangular stirrup is of a rectangular stirrup structure formed by bending a steel bar.
The longitudinal rib positioning rectangular stirrup is a rectangular stirrup structure which is formed by sequentially bonding four FRP rib material tails into a rectangular full-enclosed shape, and the included angle between two adjacent FRP rib materials is 90 degrees.
The utility model has the advantages that: the utility model relates to a composite longitudinal bar-winding grid stirrup reinforced concrete beam, which comprises a concrete beam main body, wherein the concrete beam main body comprises a concrete part and a concrete internal framework positioned inside the concrete part, and the concrete part and the concrete internal framework are poured into an integral structure; the concrete internal framework comprises a longitudinal bar component, a longitudinal bar positioning component and a grid stirrup component, wherein the longitudinal bar component comprises four FRP composite longitudinal bars which are arranged at intervals and respectively extend along the longitudinal direction of the concrete beam main body; the grid stirrup component comprises at least two FRP composite material winding grid stirrups which are sequentially arranged along the concrete beam main body at intervals in the longitudinal direction, each FRP composite material winding grid stirrup is formed by winding an FRP grid on the periphery of the longitudinal reinforcement component, the FRP grid is a grid structure formed by weaving the FRP reinforcement material by adopting a fiber bundle weaving process, and each FRP composite material winding grid stirrup is integrally bonded with each FRP composite material longitudinal reinforcement through high-strength impregnating compound. Through the structure design, the utility model discloses a muscle-winding net stirrup reinforcing concrete beam is indulged to combined material has construction convenience, the durability is good, mechanical properties is excellent advantage.
Drawings
The invention will be further described with reference to the drawings, but the embodiments in the drawings do not constitute any limitation of the invention.
Fig. 1 is the structure schematic diagram of the composite longitudinal bar-winding grid stirrup reinforced concrete beam.
Fig. 2 is a schematic structural view of an FRP grid.
Fig. 3 is the structural schematic diagram of the FRP composite material when the longitudinal ribs are fixed.
Fig. 4 is a schematic view when winding the FRP grid.
Fig. 5 is a schematic view of another mode of winding the FRP grid.
Fig. 6 is a schematic structural view of the internal concrete frame of the present invention.
Fig. 1 to 6 include:
1-concrete Beam body 2-concrete part
3-concrete internal framework 4-FRP composite longitudinal bar
5-longitudinal reinforcement positioning rectangular stirrup 6-FRP composite material winding grid stirrup
61-FRP grid.
Detailed Description
The present invention will be described with reference to specific embodiments.
As shown in fig. 1, the composite longitudinal bar-winding grid stirrup reinforced concrete beam comprises a concrete beam main body 1, wherein the concrete beam main body 1 comprises a concrete part 2 and a concrete internal framework 3 positioned inside the concrete part 2, and the concrete part 2 and the concrete internal framework 3 are poured into an integral structure.
As shown in fig. 1 and 6, the concrete internal framework 3 comprises a longitudinal bar assembly, a longitudinal bar positioning assembly and a grid stirrup assembly, wherein the longitudinal bar assembly comprises four FRP composite longitudinal bars 4 which are arranged at intervals and respectively extend along the longitudinal direction of the concrete beam main body 1, the longitudinal bar positioning assembly comprises at least two longitudinal bar positioning rectangular stirrups 5 which are sequentially arranged at intervals along the longitudinal direction of the concrete beam main body 1, and each FRP composite longitudinal bar 4 is bound and fixed with the longitudinal bar positioning rectangular stirrup 5; the grid stirrup component comprises at least two FRP composite material winding grid stirrups 6 which are sequentially arranged along the concrete beam main body 1 at intervals in the longitudinal direction, each FRP composite material winding grid stirrup 6 is formed by winding an FRP grid 61 on the periphery of the longitudinal reinforcement component, as shown in figures 1, 2, 4, 5 and 6, the FRP grid 61 is a grid structure formed by weaving the FRP reinforcement material by adopting a fiber bundle weaving process, and each FRP composite material winding grid stirrup 6 is bonded with each FRP composite material longitudinal reinforcement 4 into a whole through high-strength impregnating adhesive.
Preferably, the FRP composite material winding grid stirrup 6 is formed by winding the FRP grating 61 around at least two layers of the periphery of the longitudinal bar assembly, and the vertical FRP bars in the FRP composite material winding grid stirrup 6 are aligned.
It should be further explained that, as shown in fig. 4, the vertical FRP reinforcements in the FRP composite material wound grid stirrup 6 are arranged equidistantly along the longitudinal direction of the concrete beam main body 1, and each vertical FRP reinforcement is perpendicular to the longitudinal direction of the concrete beam main body 1; or, as shown in fig. 5, the vertical FRP reinforcements in the FRP composite material wound grid stirrup 6 are arranged along the concrete beam main body 1 in a longitudinally variable manner, and each vertical FRP reinforcement extends obliquely.
It should be further noted that the longitudinal reinforcement positioning rectangular stirrup 5 is a rectangular stirrup structure formed by bending a reinforcing steel bar; or, the longitudinal rib positioning rectangular stirrup 5 is a rectangular stirrup structure which is formed by sequentially bonding four FRP rib material ends into a rectangular full-enclosure shape, and the included angle between two adjacent FRP rib materials is 90 degrees.
The composite material longitudinal bar-winding grid stirrup reinforced concrete beam can be prepared by the following preparation method, and specifically, the preparation method of the composite material longitudinal bar-winding grid stirrup reinforced concrete beam comprises the following steps:
a. weaving the FRP rib material into an FRP grid 61 by adopting a fiber bundle weaving process;
b. positioning and fixing all FRP composite longitudinal bars 4 in a longitudinal bar assembly through a longitudinal bar positioning assembly, wherein the longitudinal bar assembly comprises four FRP composite longitudinal bars 4 which are arranged at intervals and respectively extend along the longitudinal direction of a concrete beam main body 1, the longitudinal bar positioning assembly comprises at least two longitudinal bar positioning rectangular stirrups 5 which are sequentially arranged at intervals along the longitudinal direction of the concrete beam main body 1, and each FRP composite longitudinal bar 4 is bound and fixed with the longitudinal bar positioning rectangular stirrups 5 respectively;
c. winding the FRP grid 61 on at least two layers of the periphery of the longitudinal bar component to form an FRP composite material winding grid stirrup 6, winding at least two FRP composite materials arranged at intervals on the periphery of the longitudinal bar component to wind the grid stirrup 6, and cutting redundant parts according to the anchoring length requirement of the FRP composite material winding grid stirrup 6;
d. each FRP composite material winding grid stirrup 6 is bonded with each FRP composite material longitudinal bar 4 into a whole through high-strength impregnating compound so as to complete the preparation of the concrete internal framework 3;
e. positioning the concrete internal framework 3 in a concrete pouring mould, pouring concrete in the concrete pouring mould to form a concrete part 2, and curing to obtain the composite longitudinal bar-winding grid stirrup reinforced concrete beam; wherein, among the concreting process, pay attention to the protection FPR combined material winding net stirrup, with concrete placement in no FPR combined material winding net stirrup department, carry out the concrete filling through vibrating, guarantee that FPR combined material winding net stirrup and concrete bond well.
Wherein, in step c, when winding FRP grid 61 in order to form the compound material winding net stirrup of FPR, exert prestressing force in order to guarantee that the compound material winding net stirrup of FPR is straight to FRP grid 61, and guarantee that the compound material winding net stirrup of FPR and the compound material longitudinal reinforcement 4 laminating of FRP to reach and guarantee that the compound material winding net stirrup of FPR can be with the compound material longitudinal reinforcement 4 of FRP atress warp.
In addition, after the FRP composite material winding grid stirrups 6 are bonded with each FRP composite material longitudinal bar 4 into a whole through high-strength impregnating glue, sand blasting treatment is carried out on the surfaces of the FRP composite material winding grid stirrups 6 so as to improve the friction force between the FRP composite material winding grid stirrups 6 and the concrete, and further the bonding acting force between the FRP composite material winding grid stirrups 6 and the concrete part 2 can be improved;
compare with traditional steel stirrup concrete beam and FRP stirrup concrete beam, the utility model discloses a muscle-winding net stirrup reinforcing concrete beam's advantage lies in is indulged to the combined material:
1. the FRP composite material grid stirrup formed by winding the FRP grid 61 has the characteristics of high durability, corrosion resistance, light weight and high strength, is particularly suitable for a seawater and sea sand concrete structure, and can effectively resist the erosion of chloride ions; considering that fresh water river sand resources are increasingly exhausted, the development of a seawater and sea sand concrete structure is imperative, and the method has a wide application prospect and accords with the national development strategy;
2. the FPR composite material grid stirrup formed by winding the FRP grid 61 can be cut on site, and construction is convenient, so that labor cost and time cost can be effectively reduced;
3. compared with the traditional FRP formed stirrup, the FRP composite material winding grid stirrup 6 has better mechanical property, the mechanical property degradation of the FRP formed stirrup in a bending area is avoided, and the integral working performance of a beam member is facilitated;
4. compared with FRP molding stirrups, the FRP composite grid stirrups have lower production cost, are favorable for saving materials due to excellent mechanical properties, and have better economy;
5. the FRP composite material grid stirrup can be formed by winding a plurality of layers of FRP grids 61, and calculation and selection are carried out according to the actual beam size and the stress condition;
6. gluing and positioning the multi-layer FRP composite grid stirrup through high-strength impregnating adhesive to form a whole with the longitudinal bar;
7. after the hooping of the grid of the multi-layer FRP composite material grid is glued, the stressed fiber bundles can be stressed cooperatively, so that the integrity is better;
8. after the hooping of the grid of the multi-layer FRP composite material grid is glued, the fiber bundle and the concrete have better cooperative deformation capability;
9. in the process of engineering manufacture of the FRP grid 61, the variable-strength FRP grid 61 can be formed by adjusting the fiber amount of different fiber bundles, namely, the working performance of the component can be improved in a targeted manner according to the shearing force change of the component;
10. in the manufacturing process of the FRP composite material grid stirrup, the angle of a stressed fiber bundle is adjusted, and the variable pitch inclined grid stirrup shown in figure 5 can enable the stressed angle of the fiber bundle to be the same as the tensile stress angle of concrete of a component, so that the working performance of the component is improved to the maximum extent;
11. the installation, the fixed, the cross process of multilayer FRP combined material grid net stirrup need pay attention to the adjustment of net hole position, and at the winding in-process, FRP combined material grid net stirrup will guarantee that vertical tow aligns, guarantees to cooperate between the different tow.
Synthesize above-mentioned circumstances and know, through above-mentioned structural design, the utility model discloses a reinforced concrete beam of muscle-winding net stirrup reinforcement is indulged to combined material has construction convenience, the durability is good, mechanical properties is excellent advantage.
The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.
Claims (7)
1. The utility model provides a reinforced concrete beam of longitudinal reinforcement of combined material-winding net stirrup which characterized in that: the concrete beam comprises a concrete beam main body (1), wherein the concrete beam main body (1) comprises a concrete part (2) and a concrete internal framework (3) positioned inside the concrete part (2), and the concrete part (2) and the concrete internal framework (3) are poured into an integral structure;
the concrete internal framework (3) comprises a longitudinal bar component, a longitudinal bar positioning component and a grid stirrup component, wherein the longitudinal bar component comprises four FRP composite longitudinal bars (4) which are arranged at intervals and respectively extend along the longitudinal direction of the concrete beam main body (1), the longitudinal bar positioning component comprises at least two longitudinal bar positioning rectangular stirrups (5) which are sequentially arranged at intervals along the longitudinal direction of the concrete beam main body (1), and each FRP composite longitudinal bar (4) is bound and fixed with the longitudinal bar positioning rectangular stirrups (5) respectively; the grid stirrup component comprises at least two FRP composite material winding grid stirrups (6) which are longitudinally arranged along the concrete beam main body (1) at intervals in sequence, each FRP composite material winding grid stirrup (6) is formed by winding an FRP grid (61) on the periphery of the longitudinal reinforcement component respectively, the FRP grid (61) is a grid structure formed by weaving the FRP reinforcement material by adopting a fiber bundle weaving process, and each FRP composite material winding grid stirrup (6) is integrally bonded with each FRP composite material longitudinal reinforcement (4) through high-strength impregnating adhesive respectively.
2. The composite longitudinal bar-wound grid hoop reinforced concrete beam as claimed in claim 1, wherein: the FRP composite material winding grid stirrup (6) is formed by winding the FRP grid (61) on at least two layers of the periphery of the longitudinal bar component.
3. The composite longitudinal bar-wound grid hoop reinforced concrete beam as claimed in claim 2, wherein: the FRP composite material is wound on the vertical FRP ribs in the grid stirrups (6) and aligned.
4. A composite longitudinal bar-wound grid hoop reinforced concrete beam as claimed in claim 3, wherein: vertical FRP (fiber reinforced Plastic) reinforcements in the FRP composite material winding grid stirrups (6) are longitudinally and equidistantly arranged along the concrete beam main body (1), and each vertical FRP reinforcement is respectively vertical to the concrete beam main body (1).
5. A composite longitudinal bar-wound grid hoop reinforced concrete beam as claimed in claim 3, wherein: vertical FRP (fiber reinforced Plastic) reinforcements in the FRP composite material winding grid stirrups (6) are arranged along the concrete beam main body (1) in a longitudinally variable distance mode, and the vertical FRP reinforcements extend obliquely respectively.
6. The composite longitudinal bar-wound grid hoop reinforced concrete beam as claimed in claim 1, wherein: the longitudinal reinforcement positioning rectangular stirrup (5) is of a rectangular stirrup structure formed by bending a reinforcing steel bar.
7. The composite longitudinal bar-wound grid hoop reinforced concrete beam as claimed in claim 1, wherein: the longitudinal rib positioning rectangular stirrup (5) is a rectangular stirrup structure which is formed by sequentially bonding four FRP rib material tails into a rectangular full-enclosure shape, and the included angle of two adjacent FRP rib materials is 90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020838606.3U CN212336519U (en) | 2020-05-19 | 2020-05-19 | Reinforced concrete beam with composite longitudinal bars and winding grid stirrups |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020838606.3U CN212336519U (en) | 2020-05-19 | 2020-05-19 | Reinforced concrete beam with composite longitudinal bars and winding grid stirrups |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212336519U true CN212336519U (en) | 2021-01-12 |
Family
ID=74082526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020838606.3U Active CN212336519U (en) | 2020-05-19 | 2020-05-19 | Reinforced concrete beam with composite longitudinal bars and winding grid stirrups |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212336519U (en) |
-
2020
- 2020-05-19 CN CN202020838606.3U patent/CN212336519U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gudonis et al. | FRP reinforcement for concrete structures: state-of-the-art review of application and design | |
| JP4796143B2 (en) | Reinforced body made of fiber reinforced plastic | |
| Das et al. | Applications of fiber reinforced polymer composites (FRP) in civil engineering | |
| CN209428931U (en) | Lightweight steel-coarse aggregate Reactive Powder Concrete combined beam structure | |
| CN111677187A (en) | Composite longitudinal bar-winding grid stirrup reinforced concrete beam and preparation method thereof | |
| CN102936941A (en) | Composite pipe concrete composite structure | |
| CN104805767A (en) | Prefabricated assembly FRP-reinforcing steel-bar-concrete combined bridge deck and construction method | |
| CN110674454A (en) | Simplified calculation method for flexural bearing capacity of sticky steel reinforced prestressed concrete beam | |
| CN1936193B (en) | Fiber-reinforced resin composite pile | |
| Dasgupta | Retrofitting of concrete structure with fiber reinforced polymer | |
| CN102071676A (en) | Composite material sheet pile and preparation method thereof | |
| CN212336519U (en) | Reinforced concrete beam with composite longitudinal bars and winding grid stirrups | |
| CN213389770U (en) | Reinforced structure of concrete beam bridge girder | |
| CN113089933A (en) | Steel tube concrete column with ECC (error correction code) reinforcing protective layer and FRP (fiber reinforced plastic) confined concrete core column and construction method and application thereof | |
| Nicolae et al. | Fibre reinforced polymer composites as internal and external reinforcements for building elements | |
| CN113152784A (en) | Laminated beam and preparation method thereof | |
| CN210917956U (en) | Concrete beam taking composite material grids as stirrups | |
| CN111535483A (en) | Concrete anti-cracking wall and construction method thereof | |
| CN107313552A (en) | A kind of FRP plate-concrete combination beam | |
| CN202482992U (en) | Combination component of fiber cloth strengthening concrete prefabrication component | |
| WO2006138224A1 (en) | Fabric reinforced concrete | |
| KR101178255B1 (en) | Non-synthetic arch rib for which steel and reinforced concrete were used and the arch bridge construction technique for which this was used | |
| CN1803699A (en) | Hybrid fiber reinforced resin composite material/concrete combination structure and method for manufacturing the same | |
| CN209923756U (en) | FRP grid reinforced ECC outer cylinder restrained reinforced concrete combined column | |
| KR100580223B1 (en) | Prestressed steel reinforced concrete beam using various shaped steel plates to the upper and lower flange and method for constructing bridge using the beam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |