CN111910775A - FRP-concrete combination beam shear connector - Google Patents
FRP-concrete combination beam shear connector Download PDFInfo
- Publication number
- CN111910775A CN111910775A CN202010527126.XA CN202010527126A CN111910775A CN 111910775 A CN111910775 A CN 111910775A CN 202010527126 A CN202010527126 A CN 202010527126A CN 111910775 A CN111910775 A CN 111910775A
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- frp
- plate
- concrete
- perforated
- bottom plate
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- 239000004567 concrete Substances 0.000 title claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- 239000002131 composite material Substances 0.000 claims abstract description 19
- 239000003822 epoxy resin Substances 0.000 claims abstract description 6
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 6
- 239000003292 glue Substances 0.000 claims abstract description 5
- 229920002430 Fibre-reinforced plastic Polymers 0.000 abstract description 78
- 239000011151 fibre-reinforced plastic Substances 0.000 abstract description 78
- 238000010276 construction Methods 0.000 abstract description 4
- 238000010008 shearing Methods 0.000 abstract description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000009415 formwork Methods 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 239000012761 high-performance material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011374 ultra-high-performance concrete Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4157—Longitudinally-externally threaded elements extending from the concrete or masonry, e.g. anchoring bolt with embedded head
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a shear connector for an FRP (fiber reinforced plastic) -concrete composite beam, which comprises an FRP perforated plate, an FRP I-shaped beam, perforated steel bars and concrete. Concrete is poured above the FRP I-beam, the upper surface of the FRP I-beam is connected with the bottom plate of the FRP perforated plate by adopting a plurality of bolts and epoxy resin glue, a plurality of perforated reinforcing steel bars are inserted into the connecting plate of the FRP perforated plate in a penetrating way, and the upper ends of the FRP perforated plate, the perforated reinforcing steel bars and the plurality of bolts are all positioned in the concrete. The FRP perforated plate and the FRP girder are in mixed connection through the rubber plugs, the bolts extend into concrete, and the bolts are connected with the perforated plate and the girder and bear interface shearing force, so that the shearing bearing capacity and the lifting resistance can be enhanced, and the construction is simple and the quality is reliable.
Description
Technical Field
The invention relates to the technical field of FRP connecting pieces, in particular to a shear connecting piece of an FRP-concrete composite beam.
Background
For a long time, the corrosion problem of steel in civil engineering seriously affects the service performance of a structure and reduces the durability of the structure, a fiber reinforced composite (FRP) becomes one of the most effective ways for solving the durability problem of the steel with excellent corrosion resistance, the FRP is a novel high-performance material formed by mixing a fiber material and a base material according to a certain proportion and compounding the fiber material and the base material through a certain process, the FRP-concrete composite beam is a novel structural form, and the design concept of the FRP-concrete composite beam is the same as that of a steel-concrete composite beam and a steel-concrete composite plate: the upper part is mainly pressed by concrete, the lower part is mainly pulled by an FRP member, the upper part and the lower part are cooperatively operated by a shear connector, the FRP has the advantages of light dead weight, high bearing capacity, good corrosion resistance and the like, and can jointly exert the advantages of two materials, therefore, the connecting piece between the concrete beam and the FRP section in the FRP-concrete composite beam is a key factor influencing the bearing capacity of the FRP-concrete composite beam, because of the unweldable property of the FRP material, the shear connector between the FRP profile and the concrete mainly comprises natural friction connection, cementation, expanding agent connection, mechanical occlusion connection, bolt connection, FRP perforated plate connection and the like, at present, the shear connector has various structural forms, however, the different structural forms cause different anti-sliding effects and different bearing capacities, and therefore a structural form with good anti-sliding effect and excellent shear bearing capacity is required.
Disclosure of Invention
The invention aims to provide a shear connector of an FRP-concrete composite beam, which has good anti-sliding effect and excellent anti-shearing bearing capacity.
The technical scheme adopted for achieving the purpose of the invention is that the FRP-concrete combined beam shear connector comprises an FRP perforated plate, an FRP I-shaped beam, perforated steel bars and concrete.
The cross-section of FRP trompil board is the font of falling T, FRP trompil board includes bottom plate and connecting plate. The bottom plate is a rectangular plate horizontally arranged, the upper surface of the bottom plate is vertically connected with a connecting plate, the lower surface of the bottom plate is connected with an FRP I-beam, and the length direction of the FRP I-beam is consistent with that of the bottom plate.
The connecting plate is a rectangular plate with the length direction consistent with the length direction of the bottom plate, a plurality of preformed holes for the perforated steel bars to penetrate are formed in the connecting plate, and the plurality of preformed holes are arranged at equal intervals along the length direction of the connecting plate. And a plurality of perforated steel bars penetrate through the preformed holes.
Concrete is poured above the FRP I-beam, and the FRP perforated plate and the perforated steel bars are both located in the concrete.
Further, be provided with a plurality of bolt holes I on the bottom plate, a plurality of bolt holes I are located the both sides of connecting plate respectively.
The FRP I-beam comprises an upper flange, a web and a lower flange, the upper flange of the FRP I-beam is provided with a plurality of bolt holes II, and the bolt holes II are respectively positioned on two sides of the web.
And a plurality of bolts penetrate through the bolt holes II and the bolt holes I from the lower ends, each bolt is screwed into a nut, and the upper ends of the bolts extend into the concrete.
Furthermore, epoxy resin glue is coated on the connecting surface of the bottom plate and the FRP I-beam.
Further, the width of the bottom plate is smaller than that of the FRP I-beam.
Furthermore, the web of connecting plate and FRP I-beam is on same vertical plane.
Further, the bolt is a high-strength bolt.
The technical effects of the invention are undoubtedly that the FRP perforated plate and the FRP main beam of the shear connector of the FRP-concrete composite beam are mixed and connected through the rubber bolt, the bolt is extended into the concrete, the bolt is connected with the perforated plate and the main beam and simultaneously bears the interface shear, the shear bearing capacity and the lifting resistance can be enhanced, and the construction is simple and the quality is reliable.
Drawings
FIG. 1 is a schematic structural view of a shear connector for an FRP-concrete composite beam according to the present invention;
FIG. 2 is a top view of an FRP perforated plate;
FIG. 3 is a side view of an FRP aperture plate;
FIG. 4 is a top view of the FRP I-beam.
In the figure: FRP trompil board 1, bottom plate 101, bolt hole I1011, connecting plate 102, preformed hole 1021, FRP I-beam 2, bolt hole II 201, perforation reinforcing bar 3, concrete 4 and bolt 5.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
the embodiment discloses a shear connector for an FRP (fiber reinforced plastic) -concrete composite beam, which comprises an FRP perforated plate 1, an FRP I-beam 2, perforated steel bars 3 and concrete 4.
The section of the FRP perforated plate 1 is in an inverted T shape, and the FRP perforated plate 1 comprises a bottom plate 101 and a connecting plate 102. The bottom plate 101 is a rectangular plate horizontally arranged, the upper surface of the bottom plate 101 is vertically connected with a connecting plate 102, the lower surface of the bottom plate 101 is connected with an FRP I-beam 2, the length direction of the FRP I-beam 2 is consistent with that of the bottom plate 101, and the width of the bottom plate 101 is smaller than that of the FRP I-beam 2.
The bottom plate 101 is connected with the FRP I-beam 2 through a plurality of bolts 5 and epoxy resin glue. Referring to fig. 2, a plurality of bolt holes i 1011 are formed in the bottom plate 101, and the bolt holes i 1011 are respectively located on two sides of the connecting plate 102 and are symmetrical with respect to the connecting plate 102. Referring to fig. 4, the FRP i-beam 2 includes an upper flange, a web, and a lower flange, the upper flange of the FRP i-beam 2 is provided with a plurality of bolt holes ii 201, and the bolt holes ii 201 are respectively located on two sides of the web and are symmetrical with respect to the web. A plurality of bolts 5 penetrate through the bolt holes II 201 and the bolt holes I1011 from the lower end, each bolt 5 is screwed into a nut, and each bolt 5 is a high-strength bolt. The connecting plate 102 and the web of the FRP I-beam 2 are on the same vertical plane.
Referring to fig. 3, the connecting plate 102 is a rectangular plate with a length direction consistent with that of the bottom plate 101, a plurality of prepared holes 1021 for the perforated steel bars 3 to pass through are formed in the connecting plate 102, and the prepared holes 1021 are arranged at equal intervals along the length direction of the connecting plate 102, wherein the interval is 100 mm. A plurality of the perforated steel bars 3 pass through the preformed hole 1021, and the perforated steel bars 3 are FRP bars or steel bars. The diameter of the preformed hole 1021 is larger than the sum of the diameter of the perforated steel bar 3 and the maximum particle size of the concrete 4, so that the concrete 4 can completely fill the gap of the preformed hole 1021.
Referring to fig. 1, concrete 4 is poured above the FRP i-beam 2, and the FRP perforated plate 1, the perforated steel bars 3 and the upper ends of the bolts 5 are all located in the concrete 4. The concrete 4 can be ordinary concrete or Ultra High Performance Concrete (UHPC), and a steel reinforcement cage is arranged in the concrete 4.
During construction, the method comprises the following steps:
s1, arranging a plurality of bolt holes I1011 and a plurality of reserved holes 1021 on the FRP perforated plate 1, and arranging a plurality of bolt holes II 201 on the FRP I-beam 2;
s2, coating epoxy resin glue on the lower surface of the bottom plate 101 and the upper surface of the upper flange of the FRP I-beam 2, and connecting the bottom plate and the FRP I-beam by using a plurality of bolts 5;
s3, a plurality of perforated steel bars 3 penetrate through the reserved holes 1021;
s4, supporting a formwork of concrete 4 above the FRP I-beam 2, laying common stirrups in the formwork, breaking the common stirrups at the reserved holes 1021, laying longitudinal common reinforcements, and binding the longitudinal common reinforcements with the common stirrups to form a reinforcement cage;
s5, binding a plurality of perforated steel bars 3 on a steel bar cage;
and S6, pouring the concrete 4, and removing the formwork after the maintenance is finished.
According to the shear connector for the FRP-concrete composite beam, the bolt 5 extends into the concrete 4, the FRP perforated plate 1 and the FRP I-beam 2 bear interface shear force at the same time, the shearing bearing capacity and the lifting resistance can be enhanced, and the construction is simple and the quality is reliable.
Example 2:
the embodiment discloses a shear connector for an FRP (fiber reinforced plastic) -concrete composite beam, which comprises an FRP perforated plate 1, an FRP I-beam 2, perforated steel bars 3 and concrete 4.
The section of the FRP perforated plate 1 is in an inverted T shape, and the FRP perforated plate 1 comprises a bottom plate 101 and a connecting plate 102. The bottom plate 101 is a rectangular plate horizontally arranged, the upper surface of the bottom plate 101 is vertically connected with a connecting plate 102, the lower surface of the bottom plate 101 is connected with an FRP I-beam 2, and the length direction of the FRP I-beam 2 is consistent with that of the bottom plate 101.
Referring to fig. 3, the connecting plate 102 is a rectangular plate whose length direction is the same as that of the bottom plate 101, a plurality of prepared holes 1021 for the perforated steel bars 3 to pass through are formed in the connecting plate 102, and the prepared holes 1021 are arranged at equal intervals along the length direction of the connecting plate 102. A plurality of the perforated steel bars 3 pass through the prepared holes 1021.
Referring to fig. 1, concrete 4 is poured above the FRP i-beam 2, and the FRP perforated plate 1 and the perforated steel bars 3 are both located in the concrete 4.
Example 3:
the main structure of this embodiment is the same as that of embodiment 2, and further, referring to fig. 2, a plurality of bolt holes i 1011 are provided on the base plate 101, and the bolt holes i 1011 are respectively located on two sides of the connecting plate 102.
The FRP I-beam 2 comprises an upper flange, a web and a lower flange, referring to fig. 4, the upper flange of the FRP I-beam 2 is provided with a plurality of bolt holes II 201, and the bolt holes II 201 are respectively located on two sides of the web.
A number of bolts 5 are passed through said bolt holes ii 201 and i 1011 from the lower end, each bolt 5 being screwed into a nut, see fig. 1, the upper end of the bolt 5 extending into the concrete 4.
Example 4:
the main structure of this embodiment is the same as that of embodiment 3, and further, an epoxy resin adhesive is coated on the connecting surface of the bottom plate 101 and the FRP i-beam 2.
Example 5:
the main structure of this embodiment is the same as that of embodiment 4, and further, referring to fig. 1, the width of the bottom plate 101 is smaller than that of the FRP i-beam 2.
Example 6:
the main structure of this embodiment is the same as that of embodiment 5, and further, referring to fig. 1, the connecting plate 102 and the web of the FRP i-beam 2 are on the same vertical plane.
Example 7:
the main structure of this embodiment is the same as that of embodiment 6, and further, the bolt 5 is a high-strength bolt.
Claims (6)
1. The utility model provides a FRP-concrete combination beam shear force connecting piece which characterized in that: the FRP perforated plate comprises an FRP perforated plate (1), an FRP I-beam (2), perforated steel bars (3) and concrete (4);
the section of the FRP perforated plate (1) is in an inverted T shape, and the FRP perforated plate (1) comprises a bottom plate (101) and a connecting plate (102); the bottom plate (101) is a rectangular plate which is horizontally arranged, the upper surface of the bottom plate (101) is vertically connected with a connecting plate (102), the lower surface of the bottom plate is connected with an FRP I-beam (2), and the length direction of the FRP I-beam (2) is consistent with that of the bottom plate (101);
the connecting plate (102) is a rectangular plate with the length direction consistent with that of the bottom plate (101), a plurality of preformed holes (1021) for the perforated steel bars (3) to penetrate through are formed in the connecting plate (102), and the preformed holes (1021) are arranged at equal intervals along the length direction of the connecting plate (102); a plurality of perforated steel bars (3) pass through the preformed holes (1021);
concrete (4) is poured above the FRP I-beam (2), and the FRP perforated plate (1) and the perforated steel bars (3) are both located in the concrete (4).
2. The FRP-concrete composite beam shear connector as claimed in claim 1, wherein: a plurality of bolt holes I (1011) are formed in the bottom plate (101), and the bolt holes I (1011) are respectively located on two sides of the connecting plate (102);
the FRP I-beam (2) comprises an upper flange, a web and a lower flange, the upper flange of the FRP I-beam (2) is provided with a plurality of bolt holes II (201), and the bolt holes II (201) are respectively positioned on two sides of the web;
a plurality of bolts (5) penetrate through the bolt holes II (201) and the bolt holes I (1011) from the lower end, each bolt (5) is screwed into a nut, and the upper end of each bolt (5) extends into the concrete (4).
3. The FRP-concrete composite beam shear connector as claimed in claim 1, wherein: and epoxy resin glue is coated on the connecting surface of the bottom plate (101) and the FRP I-beam (2).
4. The FRP-concrete composite beam shear connector as claimed in claim 1, wherein: the width of the bottom plate (101) is smaller than that of the FRP I-beam (2).
5. The FRP-concrete composite beam shear connector as claimed in claim 2, wherein: the connecting plate (102) and the web plate of the FRP I-beam (2) are on the same vertical plane.
6. The FRP-concrete composite beam shear connector as claimed in claim 1, wherein: the bolt (5) is a high-strength bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010527126.XA CN111910775A (en) | 2020-06-11 | 2020-06-11 | FRP-concrete combination beam shear connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010527126.XA CN111910775A (en) | 2020-06-11 | 2020-06-11 | FRP-concrete combination beam shear connector |
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| Publication Number | Publication Date |
|---|---|
| CN111910775A true CN111910775A (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010527126.XA Pending CN111910775A (en) | 2020-06-11 | 2020-06-11 | FRP-concrete combination beam shear connector |
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| CN (1) | CN111910775A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113774781A (en) * | 2021-09-07 | 2021-12-10 | 湖南路桥建设集团有限责任公司 | Shear part joint composite structure of composite beam bridge and construction method thereof |
| CN114892870A (en) * | 2022-06-14 | 2022-08-12 | 河南黄国钢结构有限公司 | Steel and concrete assembled structure and forming device thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328753A (en) * | 2008-07-24 | 2008-12-24 | 同济大学 | Fiber reinforcement composite material - concrete combination beam |
-
2020
- 2020-06-11 CN CN202010527126.XA patent/CN111910775A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328753A (en) * | 2008-07-24 | 2008-12-24 | 同济大学 | Fiber reinforcement composite material - concrete combination beam |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113774781A (en) * | 2021-09-07 | 2021-12-10 | 湖南路桥建设集团有限责任公司 | Shear part joint composite structure of composite beam bridge and construction method thereof |
| CN114892870A (en) * | 2022-06-14 | 2022-08-12 | 河南黄国钢结构有限公司 | Steel and concrete assembled structure and forming device thereof |
| CN114892870B (en) * | 2022-06-14 | 2023-08-22 | 河南黄国钢结构有限公司 | Steel and concrete assembled structure and forming device thereof |
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Application publication date: 20201110 |