CN217500791U - Combined high-shear FRP (fiber reinforced Plastic) section bar concrete composite beam - Google Patents
Combined high-shear FRP (fiber reinforced Plastic) section bar concrete composite beam Download PDFInfo
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- CN217500791U CN217500791U CN202221656670.5U CN202221656670U CN217500791U CN 217500791 U CN217500791 U CN 217500791U CN 202221656670 U CN202221656670 U CN 202221656670U CN 217500791 U CN217500791 U CN 217500791U
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Abstract
A combined type high-shear-resistance FRP section concrete composite beam is provided with a concrete plate, an FRP plate and an FRP section, wherein the FRP section comprises at least two I-shaped FRP sections horizontally spliced along the transverse direction, and U-shaped lightweight concrete plates are uniformly distributed on two sides of a web plate and below a wing plate of the I-shaped FRP section; the FRP plates are correspondingly laid on the upper part of an upper wing plate and the lower part of a lower wing plate of the I-shaped FRP section; the concrete slab is arranged on the upper part of the FRP plate and internally provided with stirrups and longitudinal steel bars correspondingly; the FRP plate and the FRP profile are connected through glue and a bolt fastener, and the bolt fastener is arranged on the inner side of the stirrup of the concrete plate and sequentially penetrates through the concrete plate, the FRP plate and the wing plate of the FRP profile; the rigidity and the shearing resistance bearing capacity of the combined beam are improved, and the self weight is light.
Description
Technical Field
The utility model belongs to the technical field of building structure, in particular to modular high FRP section bar concrete composite beam that shears.
Background
The FRP section has good long-term mechanical property, is fatigue-resistant, does not have the corrosion problem, and has good engineering application potential. However, when the conventional section steel-concrete composite beam is simply replaced by the FRP section, it is found that the rigidity of the FRP section cannot meet the requirement on the deflection of the member in the structural design specification, although the bearing capacity of the FRP section-concrete composite beam is relatively large, the limit value of the deflection causes the bearing capacity corresponding to the deflection limit value to be larger than the strength reserve, and in addition, the composite beam often has brittle failure such as web shear failure, which causes the composite beam to fail prematurely, so measures need to be taken to improve the rigidity of the FRP section-concrete composite beam, and in addition, the shear bearing capacity of the composite beam needs to be improved. The defects of small rigidity, large deflection and low shearing resistance and bearing capacity of the FRP profile-concrete composite beam need to be solved urgently.
The utility model with the bulletin number of CN216475887U discloses a novel interface FRP profile-concrete combination beam, which adopts the technical scheme that the novel interface FRP profile-concrete combination beam comprises concrete and an FRP profile, an SIP-SK plate is arranged between the upper flanges of the concrete and the FRP profile, a plurality of connecting through holes are arranged on the SIP-SK plate and are all provided with connecting bolts, and the connecting bolts sequentially pass through the connecting through holes of the SIP-SK plate and the upper flanges of the FRP profile to fixedly connect the SIP-SK plate and the FRP profile; the lower end face of the SIP-SK plate is bonded with the upper flange of the FRP profile through a bonding layer; according to the novel interface FRP profile-concrete combined beam, the SIP-SK plate is arranged between the upper flanges of the concrete and the FRP profile, a novel interface connection mode is provided, the interface rigidity of the combined beam can be improved, the interface can still keep a small sliding value under the condition of high load, and the sliding value of the end interface of the combined beam can still keep a low level under the condition of high load; however, the FRP section is only of an i-shaped structure, and shear-resistant members are not disposed on both sides of the web, so that shear failure is likely to occur.
The utility model with the bulletin number of CN215926476U discloses an assembled FRP profile-concrete composite beam, which has the technical scheme that the assembled FRP profile-concrete composite beam comprises a precast concrete plate and an FRP profile, the precast concrete plate is provided with preformed holes which are arranged at intervals along the length direction of the precast concrete, the upper surface of the FRP profile is provided with a shear connector, the precast concrete plate is arranged above the FRP profile, UHPC is poured in the preformed holes, and the FRP profile is connected with the UHPC in a shear manner; the assembled FRP profile-concrete composite beam has the advantages of saving templates, improving construction environment, improving construction efficiency and the like compared with an assembled structure, and has the advantages of small self weight, high bearing capacity and good durability of the FRP profile-concrete composite structure; however, the anti-shearing members are not arranged on the two sides of the I-shaped web of the FRP profile, and the shearing destructiveness is to be improved.
Disclosure of Invention
The utility model aims at the not enough of above-mentioned prior art, provide a modular high FRP section bar concrete composite beam that shears, it is low to solve FRP section bar composite beam rigidity, easily takes place the problem that FRP section bar web vertically sheared the destruction.
For solving the above technical problem, the utility model discloses a technical scheme is:
the utility model provides a modular high FRP section bar concrete composite beam that shears, includes concrete slab, FRP panel and its characterized in that of FRP section bar: the FRP profiles comprise at least two I-shaped FRP profiles horizontally spliced along the transverse direction, and U-shaped lightweight concrete plates are uniformly distributed on two sides of a web plate and below wing plates of the I-shaped FRP profiles;
the FRP plates are correspondingly paved on the upper part of an upper wing plate and the lower part of a lower wing plate of the I-shaped FRP sectional material;
the concrete slab is arranged on the upper part of the FRP plate and internally provided with stirrups and longitudinal steel bars correspondingly;
the FRP plate and the FRP section are connected through glue and bolt fasteners, and the bolt fasteners are arranged on the inner sides of the stirrups of the concrete plates and sequentially penetrate through the concrete plates, the FRP plate and wing plates of the FRP section.
The U-shaped lightweight concrete plate and the web and the flange of the FRP section are connected together through gluing and bolt fasteners.
The thickness of the U-shaped lightweight concrete plate is 1-3 times of that of the FRP section web plate, and the U-shaped lightweight concrete plate is longitudinally arranged along the length of the beam.
The width of the FRP plate is equal to the sum of the widths of flanges of the I-shaped FRP sectional materials.
The bolt fastener adopts high-strength bolts, and the distance between the lower surface of the bolt cap of the bolt fastener arranged on the inner side of the stirrup of the concrete slab and the bottom steel bar is not less than 30 mm.
The FRP plate and the FRP section are glued by adopting epoxy resin; and the web and the flange of the U-shaped lightweight concrete plate and the FRP section are also glued by epoxy resin.
The U-shaped lightweight concrete slab is a prefabricated slab.
The concrete slab is a post-cast concrete slab.
The utility model has the advantages that:
(1) the combined high-shear-resistance FRP section concrete composite beam is provided with a concrete plate, an FRP plate and an FRP section, wherein the FRP section comprises at least two I-shaped FRP sections horizontally spliced along the transverse direction, and U-shaped lightweight concrete plates are uniformly distributed on two sides of a web plate and below a wing plate of the I-shaped FRP section; the FRP plates are correspondingly paved on the upper part of an upper wing plate and the lower part of a lower wing plate of the I-shaped FRP sectional material; the concrete slab is arranged on the upper part of the FRP plate and internally provided with stirrups and longitudinal steel bars correspondingly; the FRP plate and the FRP profile are connected through glue and a bolt fastener, and the bolt fastener is arranged on the inner side of the stirrup of the concrete plate and sequentially penetrates through the concrete plate, the FRP plate and the wing plate of the FRP profile; the rigidity and the shearing resistance bearing capacity of the combined beam are improved, and the self weight is light.
(2) After the lightweight concrete plates are attached to the flange and the web of the FRP profile, the lightweight concrete plates and the web participate in shearing resistance together, the shearing resistance of the FRP profile is improved, the lightweight concrete plates can not bring excessive self weight to the structure while the shearing resistance of the FRP profile is enhanced, the combination form is good, the rigidity of the combined high-shearing-resistance FRP profile concrete composite beam is improved by about one time compared with that of an I-shaped FRP profile composite beam, and meanwhile, the shearing resistance bearing capacity of the composite beam is also improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
The utility model provides a modular high FRP section bar concrete composite beam that shears, as shown in figure 1.
A combined type high-shear-resistance FRP (fiber reinforced plastic) section concrete composite beam comprises a concrete plate 3, an FRP plate 2 and an FRP section 1, wherein the FRP section 1 comprises at least two I-shaped FRP sections horizontally spliced along the transverse direction, and U-shaped light concrete plates 7 are uniformly distributed on two sides of a web plate and below a wing plate of the I-shaped FRP section; the FRP plates 2 are correspondingly paved on the upper part of an upper wing plate and the lower part of a lower wing plate of the I-shaped FRP sectional material; the concrete slab 3 is arranged on the upper part of the FRP plate 2 and internally and correspondingly provided with stirrups 5 and longitudinal steel bars 4; the FRP plate 2 is connected with the FRP section bar 1 through gluing and a bolt fastener 6, and the bolt fastener 6 is arranged on the inner side of the concrete plate stirrup 5 and sequentially passes through the concrete plate 3, the FRP plate 2 and a wing plate of the FRP section bar 1.
The U-shaped lightweight concrete plate 7 and the web and the flange of the FRP section bar 1 are connected together through gluing and bolt fasteners; in this embodiment, the FRP plate and the FRP section are adhered by using epoxy resin 8; the U-shaped lightweight concrete plate 7 and the web and the flange of the FRP section bar 1 are also glued through epoxy resin 8, so that the bonding firmness between corresponding parts is improved.
The thickness of the U-shaped lightweight concrete plate 7 is 1-3 times of the thickness of the web plate of the FRP section bar 1, the U-shaped lightweight concrete plate is longitudinally arranged along the length of the beam, and the width of the FRP plate 2 is equal to the sum of the widths of the flanges of the I-shaped FRP section bar.
The bolt fastener 6 adopts a high-strength bolt, and the distance between the lower surface of a bolt cap of the bolt fastener arranged on the inner side of the concrete slab stirrup 5 and the bottom steel bar is not less than 30mm, so that the structural strength is improved.
The U-shaped lightweight concrete slab 7 is a precast slab, and the concrete slab 3 is a post-cast concrete slab.
During manufacturing, firstly, brushing a layer of epoxy resin on a web and a flange of an I-shaped FRP (fiber reinforced plastic) section bar 1, then pasting a prefabricated U-shaped lightweight concrete plate 7 on the I-shaped FRP section bar 1, punching at a corresponding position of the web after the U-shaped lightweight concrete plate 7 and the I-shaped FRP section bar are firmly bonded, installing a bolt fastener 6, then brushing epoxy resin on the top of an upper wing plate of the FRP section bar and the bottom of a lower wing plate of the FRP section bar, pasting an FRP plate 2, punching upper and lower FRP plates after the FRP plates and the FRP section bar are firmly bonded, installing the bolt fastener 6, then binding longitudinal ribs 4 and stirrups 5 to form a reinforcement cage, then erecting a concrete template and pouring a concrete plate 3, and obtaining the combined high-shear-resistant section bar concrete composite beam.
Tests show that the failure mode of the FRP section-concrete composite beam is mostly concentrated on the shearing failure of the web, and after the lightweight concrete plate is attached to the flange and the web of the FRP section, the lightweight concrete plate and the web participate in shearing resistance together, so that the shearing resistance of the FRP section is improved, excessive self weight cannot be brought to the structure when the shearing resistance of the FRP section is enhanced, the combination form is good, the rigidity of the combined type high-shearing-resistance FRP section concrete composite beam is about doubled compared with that of an I-shaped FRP section composite beam, and meanwhile, the shearing resistance bearing capacity of the composite beam is improved.
Where the words "first", "second", etc. are used in this patent to define parts, those skilled in the art will recognize that: the use of "first" and "second" is merely for convenience in describing the invention and to simplify the description, and the words above have no special meaning.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, but rather is described in the embodiments and descriptions herein to illustrate the principles of the invention and that various changes and modifications may be made without departing from the spirit and scope of the invention, all of which fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents.
In the description of the present invention, it should be understood that the terms "front", "back", "left", "right", "center", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the scope of the present invention.
Claims (8)
1. The utility model provides a modular high FRP section bar concrete composite beam that shears, includes concrete slab, FRP panel and FRP section bar, its characterized in that: the FRP profiles comprise at least two I-shaped FRP profiles horizontally spliced along the transverse direction, and U-shaped lightweight concrete plates are uniformly distributed on two sides of a web plate and below wing plates of the I-shaped FRP profiles;
the FRP plates are correspondingly paved on the upper part of an upper wing plate and the lower part of a lower wing plate of the I-shaped FRP sectional material;
the concrete slab is arranged on the upper part of the FRP plate and internally provided with stirrups and longitudinal steel bars correspondingly;
the FRP plate and the FRP section are connected through glue and bolt fasteners, and the bolt fasteners are arranged on the inner sides of the stirrups of the concrete plates and sequentially penetrate through the concrete plates, the FRP plate and wing plates of the FRP section.
2. The combined high shear FRP profile concrete composite beam as claimed in claim 1, wherein: the U-shaped lightweight concrete plate and the web and the flange of the FRP section are connected together through gluing and bolt fasteners.
3. The combined high shear FRP profile concrete composite beam as claimed in claim 1, wherein: the thickness of the U-shaped lightweight concrete plate is 1-3 times of that of the FRP section web plate, and the U-shaped lightweight concrete plate is longitudinally arranged along the length of the beam.
4. The combined high shear FRP profile concrete composite beam as claimed in claim 1, wherein: the width of the FRP plate is equal to the sum of the widths of flanges of the I-shaped FRP sectional materials.
5. The combined high shear FRP profile concrete composite beam as claimed in any one of claims 1 to 4, wherein: the bolt fastener adopts high-strength bolts, and the distance between the lower surface of the bolt cap of the bolt fastener arranged on the inner side of the stirrup of the concrete slab and the bottom steel bar is not less than 30 mm.
6. The combined high shear FRP profile concrete composite beam as claimed in claim 5, wherein: the FRP plate and the FRP section are glued by adopting epoxy resin; and the web and the flange of the U-shaped lightweight concrete plate and the FRP section are also glued by epoxy resin.
7. The combined type high shear FRP profile concrete composite beam as claimed in claim 5, which is characterized in that: the U-shaped lightweight concrete slab is a prefabricated slab.
8. The combined type high shear FRP profile concrete composite beam as claimed in claim 5, which is characterized in that: the concrete slab is a post-cast concrete slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221656670.5U CN217500791U (en) | 2022-06-30 | 2022-06-30 | Combined high-shear FRP (fiber reinforced Plastic) section bar concrete composite beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221656670.5U CN217500791U (en) | 2022-06-30 | 2022-06-30 | Combined high-shear FRP (fiber reinforced Plastic) section bar concrete composite beam |
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| Publication Number | Publication Date |
|---|---|
| CN217500791U true CN217500791U (en) | 2022-09-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221656670.5U Active CN217500791U (en) | 2022-06-30 | 2022-06-30 | Combined high-shear FRP (fiber reinforced Plastic) section bar concrete composite beam |
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| Country | Link |
|---|---|
| CN (1) | CN217500791U (en) |
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2022
- 2022-06-30 CN CN202221656670.5U patent/CN217500791U/en active Active
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