CN113417370A - Cold bending inverted-V-shaped rigid shear connector - Google Patents
Cold bending inverted-V-shaped rigid shear connector Download PDFInfo
- Publication number
- CN113417370A CN113417370A CN202110609140.9A CN202110609140A CN113417370A CN 113417370 A CN113417370 A CN 113417370A CN 202110609140 A CN202110609140 A CN 202110609140A CN 113417370 A CN113417370 A CN 113417370A
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- 238000005452 bending Methods 0.000 title claims abstract description 98
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 121
- 239000010959 steel Substances 0.000 claims abstract description 121
- 238000010008 shearing Methods 0.000 claims abstract description 12
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
- E04B1/388—Separate connecting elements
-
- 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
- E04B1/58—Connections for building structures in general of bar-shaped building elements
Abstract
The invention discloses a cold-bending U-shaped rigid shear connector which comprises a steel beam upper flange, cold-bending U-shaped section steel and a plurality of U-shaped reinforcing steel bars. The cold-bending U-shaped section steel is welded on the upper flange of the steel beam, and the opening direction of the cold-bending U-shaped section steel is opposite to the shearing direction. The cold-bending U-shaped section steel comprises side edges, a top edge, a head section, a first bending section and a second bending section. The opening of U-shaped reinforcing bar is down, and the opening direction of U-shaped reinforcing bar place plane and how many font shaped steel of cold bending is perpendicular, and two vertical sections of U-shaped reinforcing bar weld respectively on the outer wall of two sides, and a plurality of U-shaped reinforcing bars are along the opening direction interval arrangement of how many font shaped steel of cold bending. The structure of the invention uses the cold bending inverted-V-shaped rigid shear connecting piece, is convenient to process and is formed by cold bending, and inherits the advantage of small stress concentration of the horseshoe-shaped steel connecting piece. By using the cold-bending inverted-V-shaped rigid shear connector, the shearing resistance bearing capacity requirement in the secondary shearing resistance direction can be provided by controlling the head-out distance of two sides of the inverted-V-shaped rigid shear connector according to actual requirements.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a cold-bending inverted-U-shaped rigid shear connector.
Background
Steel-concrete composite beams are widely used in bridge structures and building structures due to superior stress performance, construction performance, good comprehensive benefits and the like. The shear connector is a key component which combines the steel beam and the concrete plate together to work together, can transfer the longitudinal shear force between the steel beam and the concrete wing plate and can prevent the wing plate from lifting.
The cylindrical head welding nail in the flexible connecting piece is widely applied to various projects due to the advantages of isotropy when being sheared, simple manufacturing process, less limitation of operation environment and the like; but it has the disadvantages of low shear bearing capacity of a single peg, large deformation of the peg root, and easy local crushing of the concrete slab. Compared with a flexible shear key, the rigid shear part has higher shear strength and rigidity, and is commonly used in structures without considering shear redistribution, such as bridge structures and the like; however, in order to ensure the bearing capacity and rigidity, the steel consumption is large, such as common square steel and T-shaped steel connecting pieces, and because the steel is easy to cause stress concentration, the steel needs to be locally treated in some structures bearing dynamic load.
In recent years, as a rigid connecting piece, horseshoe-shaped steel has less steel consumption than square steel and T-shaped steel due to stress concentration, and is applied to bridge structures to a certain extent. However, the shear direction of the horseshoe-shaped steel is changed due to the change of system conversion or load working conditions, and the shear resistance direction becomes a big disadvantage of the application of the horseshoe-shaped steel.
Therefore, there is a need to develop a new type of connector that can solve the above problems.
Disclosure of Invention
The invention aims to provide a cold-bending inverted-V-shaped rigid shear connecting piece to solve the problems in the prior art.
The technical scheme adopted for achieving the purpose of the invention is that the cold bending inverted-V-shaped rigid shear connecting piece comprises a steel beam upper flange, cold bending inverted-V-shaped section steel and a plurality of U-shaped reinforcing steel bars.
The cold-bending U-shaped section steel is welded on the upper flange of the steel beam, the opening direction of the cold-bending U-shaped section steel is parallel to the horizontal plane, and the opening direction of the cold-bending U-shaped section steel is opposite to the shearing force direction between the upper flange of the steel beam and the cold-bending U-shaped section steel.
The cold-bending U-shaped section steel comprises side edges, a top edge, two head sections, first bending sections and second bending sections, wherein two ends of the top edge are respectively connected with the two first bending sections, the two first bending sections are respectively connected with the two side edges, the two side edges are respectively connected with the two second bending sections, and the two second bending sections are respectively connected with the two head sections.
The openings of the U-shaped steel bars face downwards, the plane of each U-shaped steel bar is perpendicular to the opening direction of the cold-bending U-shaped steel bars, and the two vertical sections of the U-shaped steel bars are welded on the outer walls of the two side edges respectively.
Furthermore, a U-shaped steel bar is welded on the cold-bending U-shaped section steel, and the centroid of the cold-bending U-shaped section steel is located on the plane where the U-shaped steel bar is located.
Furthermore, two U-shaped steel bars are welded on the cold-bending U-shaped profile steel, and the two U-shaped steel bars are respectively close to the first bending section and the second bending section.
Furthermore, the cold-bending U-shaped section steel is formed by cold bending, the thickness is t, t is more than or equal to 6mm and less than or equal to 16mm, the radius of the second bending section is R, the radius of the first bending section is R, R is more than or equal to t and less than or equal to 3t, and R is more than or equal to 2t and less than or equal to 4 t.
Further, the length of the head-out section is recorded as a, the value of a is determined according to the required secondary shear bearing capacity and is more than or equal to 2t, and the distance from each head-out section to the edge of the upper flange of the steel beam is more than or equal to t.
Furthermore, the diameter of the U-shaped steel bar is d, and d is more than or equal to 10mm and less than or equal to 20 mm. The welding length of the U-shaped steel bar and each side edge is more than or equal to 3 d.
The invention has the beneficial effects that:
1. the cold-bending U-shaped rigid shear connecting piece is convenient to process and is formed by cold bending, and the advantage of small stress concentration of the U-shaped steel connecting piece is inherited;
2. by using the cold-bending inverted-V-shaped rigid shear connector, the shearing resistance bearing capacity requirement in the secondary shearing resistance direction can be provided by controlling the head-out distance of two sides of the inverted-V-shaped rigid shear connector according to actual requirements.
Drawings
FIG. 1 is a schematic view of the shear connection of example 1;
FIG. 2 is a schematic view of the shear connection of embodiment 3;
FIG. 3 is a schematic view of a cold-bent inverted-V-shaped section steel;
fig. 4 is a schematic view of a U-shaped reinforcing bar.
In the figure: the steel beam top flange 1, the cold-bending U-shaped section steel 2, the U-shaped steel bar 3, the side edge 4, the top edge 5, the head section 6, the first bending section 7 and the second bending section 8.
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 cold-bending U-shaped rigid shear connector which comprises a steel beam upper flange 1, cold-bending U-shaped section steel 2 and a plurality of U-shaped steel bars 3. The steel beam upper flange 1 is made of Q460-grade steel, the cold-bending U-shaped type 2 is made of Q235-grade steel, and the U-shaped steel bar 3 is made of HRB 400.
Referring to fig. 1, the cold-bent inverted-V-shaped section steel 2 is welded on the upper flange 1 of the steel beam, the opening direction of the cold-bent inverted-V-shaped section steel 2 is parallel to the horizontal plane, and the opening direction of the cold-bent inverted-V-shaped section steel 2 is opposite to the shearing direction between the upper flange 1 of the steel beam and the cold-bent inverted-V-shaped section steel 2.
Referring to fig. 3, the cold-formed u-shaped section steel 2 includes side edges 4, a top edge 5, two end sections 6, first bending sections 7 and second bending sections 8, two ends of the top edge 5 are respectively connected to the two first bending sections 7, the two first bending sections 7 are respectively connected to the two side edges 4, the two side edges 4 are respectively connected to the two second bending sections 8, and the two second bending sections 8 are respectively connected to the two end sections 6.
The cold-bending U-shaped section steel 2 is formed by cold bending, the thickness is t, t is more than or equal to 6mm and less than or equal to 16mm, the radius of the second bending section 8 is R, the radius of the first bending section 7 is R, t is more than or equal to R and less than or equal to 3t, and R is more than or equal to 2t and less than or equal to 4 t. In this example, t is 16mm, R is 3 t-48 mm, and R is 4 t-64 mm.
The length of the head-out section 6 is marked as a, the value of a is determined according to the required secondary shear bearing capacity and is more than or equal to 2t, and the distance from each head-out section 6 to the edge of the steel beam upper flange 1 is more than or equal to t.
Referring to fig. 4, a plurality of openings of the U-shaped steel bars 3 face downward, a plane where each U-shaped steel bar 3 is located is perpendicular to the opening direction of the cold-bending n-shaped section steel 2, two vertical sections of the U-shaped steel bars 3 are respectively welded on the outer walls of the two side edges 4, and the U-shaped steel bars 3 are arranged at intervals along the opening direction of the cold-bending n-shaped section steel 2. In this embodiment, two U-shaped steel bars 3 are welded on the cold-bending n-shaped section steel 2, and the two U-shaped steel bars 3 are respectively close to the first bending section 7 and the second bending section 8.
The diameter of the U-shaped steel bar 3 is d, d is more than or equal to 10mm and less than or equal to 20mm, and in the embodiment, d is 20 mm. The welding length of the U-shaped steel bar 3 and each side edge 4 is more than or equal to 3 d.
It should be noted that the main shearing force of the connecting member of this embodiment is borne by the main body portion of the n-shaped connecting member, the secondary shearing force is borne by the head section, and the length of the head section can be adjusted according to the required bearing capacity, the U-shaped steel bar provides the lifting resistance, and the connecting member is a rigid connecting member with less stress concentration and bidirectional shearing resistance, and can be widely applied to cast-in-place and prefabricated assembled steel-concrete composite bridges.
Example 2:
the embodiment discloses a cold-bending U-shaped rigid shear connector which comprises a steel beam upper flange 1, cold-bending U-shaped section steel 2 and a plurality of U-shaped steel bars 3.
Referring to fig. 2, the cold-bent inverted-V-shaped section steel 2 is welded on the upper flange 1 of the steel beam, the opening direction of the cold-bent inverted-V-shaped section steel 2 is parallel to the horizontal plane, and the opening direction of the cold-bent inverted-V-shaped section steel 2 is opposite to the shearing direction between the upper flange 1 of the steel beam and the cold-bent inverted-V-shaped section steel 2.
Referring to fig. 3, the cold-formed u-shaped section steel 2 includes side edges 4, a top edge 5, two end sections 6, first bending sections 7 and second bending sections 8, two ends of the top edge 5 are respectively connected to the two first bending sections 7, the two first bending sections 7 are respectively connected to the two side edges 4, the two side edges 4 are respectively connected to the two second bending sections 8, and the two second bending sections 8 are respectively connected to the two end sections 6.
A plurality of the opening of U-shaped reinforcing bar 3 is down, and every U-shaped reinforcing bar 3 plane is perpendicular with the opening direction of the how font shaped steel 2 of cold bending, and two vertical sections of U-shaped reinforcing bar 3 weld respectively on the outer wall of two sides 4.
Example 3:
the main structure of this embodiment is the same as that of embodiment 2, and further, referring to fig. 2, a U-shaped steel bar 3 is welded to the cold-bent inverted-V-shaped section steel 2, and the centroid of the cold-bent inverted-V-shaped section steel 2 is located on the plane where the U-shaped steel bar 3 is located.
Example 4:
the main structure of the present embodiment is the same as that of embodiment 2, further, the cold-bending n-shaped section steel 2 is formed by cold bending, the thickness is t, t is greater than or equal to 6mm and is less than or equal to 16mm, the radius of the second bending section 8 is R, the radius of the first bending section 7 is R, R is greater than or equal to t and is less than or equal to 3t, and R is greater than or equal to 2t and is less than or equal to 4 t. In this example, t is 6mm, R is 6mm, and R is 2mm 12 mm.
Example 5:
the main structure of this embodiment is the same as that of embodiment 4, further, the length of the head-out section 6 is denoted as a, the value of a is determined according to the required secondary shear-resisting bearing capacity and is greater than or equal to 2t, and the distance from each head-out section 6 to the edge of the steel beam upper flange 1 is greater than or equal to t.
Example 6:
the main structure of the embodiment is the same as that of embodiment 2, further, the diameter of the U-shaped steel bar 3 is d, d is greater than or equal to 10mm and less than or equal to 20mm, and d in this embodiment is 10 mm. The welding length of the U-shaped steel bar 3 and each side edge 4 is more than or equal to 3 d.
Claims (6)
1. The utility model provides a how font rigidity shear force connecting piece coldly bends which characterized in that: the steel beam comprises a steel beam upper flange (1), a cold-bending U-shaped section steel (2) and a plurality of U-shaped reinforcing steel bars (3);
the cold-bending U-shaped section steel (2) is welded on the upper flange (1) of the steel beam, the opening direction of the cold-bending U-shaped section steel (2) is parallel to the horizontal plane, and the opening direction of the cold-bending U-shaped section steel (2) is opposite to the shearing force direction between the upper flange (1) of the steel beam and the cold-bending U-shaped section steel (2);
the cold-bending U-shaped section steel (2) comprises side edges (4), a top edge (5), two head sections (6), first bending sections (7) and second bending sections (8), wherein two ends of the top edge (5) are respectively connected with the two first bending sections (7), the two first bending sections (7) are respectively connected with the two side edges (4), the two side edges (4) are respectively connected with the two second bending sections (8), and the two second bending sections (8) are respectively connected with the two head sections (6);
the openings of the U-shaped steel bars (3) face downwards, the plane of each U-shaped steel bar (3) is perpendicular to the opening direction of the cold-bending U-shaped section steel (2), and two vertical sections of the U-shaped steel bars (3) are welded to the outer walls of the two side edges (4) respectively.
2. A cold-bent inverted-letter-shaped rigid shear connector according to claim 1, wherein: a U-shaped steel bar (3) is welded on the cold-bending U-shaped profile steel (2), and the centroid of the cold-bending U-shaped profile steel (2) is located on the plane where the U-shaped steel bar (3) is located.
3. A cold-bent inverted-letter rigid shear connector according to claim 1 or 2, wherein: two U-shaped reinforcing steel bars (3) are welded on the cold-bending U-shaped profile steel (2), and the two U-shaped reinforcing steel bars (3) are respectively close to the first bending section (7) and the second bending section (8).
4. A cold-bent inverted-letter rigid shear connector according to claim 1 or 3, wherein: the cold-bending U-shaped section steel (2) is formed by cold bending, the thickness is t, t is more than or equal to 6mm and less than or equal to 16mm, the radius of the second bending section (8) is R, the radius of the first bending section (7) is R, t is more than or equal to 3t, and R is more than or equal to 2t and less than or equal to 4 t.
5. A cold-bent inverted-V-shaped rigid shear connector according to claim 4, wherein: the length of the head-out section (6) is marked as a, the value of a is determined according to the required secondary shear bearing capacity and is more than or equal to 2t, and the distance from each head-out section (6) to the edge of the steel beam upper flange (1) is more than or equal to t.
6. A cold-bent inverted-letter-shaped rigid shear connector according to claim 1, wherein: the diameter of the U-shaped steel bar (3) is d, and d is more than or equal to 10mm and less than or equal to 20 mm; the welding length of the U-shaped steel bar (3) and each side edge (4) is more than or equal to 3 d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110609140.9A CN113417370B (en) | 2021-06-01 | 2021-06-01 | Cold bending inverted-V-shaped rigid shear connector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110609140.9A CN113417370B (en) | 2021-06-01 | 2021-06-01 | Cold bending inverted-V-shaped rigid shear connector |
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| CN113417370A true CN113417370A (en) | 2021-09-21 |
| CN113417370B CN113417370B (en) | 2022-12-06 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201314025Y (en) * | 2008-08-20 | 2009-09-23 | 北京锦泰安联桥梁钢构技术有限公司 | Concrete pin shear connector structure with elliptic holes |
| CN102888897A (en) * | 2012-09-13 | 2013-01-23 | 东南大学 | Shearing resistance connection piece for steel and concrete combined structural member |
| CN105507429A (en) * | 2014-09-22 | 2016-04-20 | 贵州中建建筑科研设计院有限公司 | Structure and construction method of aperture steel plate shear keys |
| CN205421722U (en) * | 2016-02-19 | 2016-08-03 | 中南大学 | Steel - concrete structure's compound shear force connecting piece |
| CN110067312A (en) * | 2019-05-30 | 2019-07-30 | 清华大学 | Perforated panel shear connector and its processing method |
| US20190316305A1 (en) * | 2018-04-11 | 2019-10-17 | Vellaisamy THAVAMANI PANDI | System for construction of composite u shaped reinforced girders bridge deck and methods thereof |
-
2021
- 2021-06-01 CN CN202110609140.9A patent/CN113417370B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201314025Y (en) * | 2008-08-20 | 2009-09-23 | 北京锦泰安联桥梁钢构技术有限公司 | Concrete pin shear connector structure with elliptic holes |
| CN102888897A (en) * | 2012-09-13 | 2013-01-23 | 东南大学 | Shearing resistance connection piece for steel and concrete combined structural member |
| CN105507429A (en) * | 2014-09-22 | 2016-04-20 | 贵州中建建筑科研设计院有限公司 | Structure and construction method of aperture steel plate shear keys |
| CN205421722U (en) * | 2016-02-19 | 2016-08-03 | 中南大学 | Steel - concrete structure's compound shear force connecting piece |
| US20190316305A1 (en) * | 2018-04-11 | 2019-10-17 | Vellaisamy THAVAMANI PANDI | System for construction of composite u shaped reinforced girders bridge deck and methods thereof |
| CN110067312A (en) * | 2019-05-30 | 2019-07-30 | 清华大学 | Perforated panel shear connector and its processing method |
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| CN113417370B (en) | 2022-12-06 |
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