CN215858253U - Concrete floor stand node connection structure - Google Patents

Concrete floor stand node connection structure Download PDF

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Publication number
CN215858253U
CN215858253U CN202120823049.2U CN202120823049U CN215858253U CN 215858253 U CN215858253 U CN 215858253U CN 202120823049 U CN202120823049 U CN 202120823049U CN 215858253 U CN215858253 U CN 215858253U
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column
concrete
steel
concrete floor
main
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CN202120823049.2U
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张能伟
徐方媛
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Architecture Design and Research Institute of Tongji University Group Co Ltd
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Architecture Design and Research Institute of Tongji University Group Co Ltd
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Abstract

The utility model relates to a concrete floor column joint connection structure which comprises a newly added concrete column (1), a main steel beam (2) arranged at the column bottom of the newly added concrete column (1) in the short span direction and a secondary steel beam (3) arranged at the column bottom of the newly added concrete column (1) in the long span direction, wherein the main steel beam (2), the secondary steel beam (3) and a concrete floor (5) are connected through a plurality of U-shaped hoops (4). Compared with the prior art, the utility model has the advantages of effectively preventing the concrete floor from punching and damaging under the load of the newly added column, improving the safety redundancy of the structure, ensuring the effective transmission of the bending moment of the column bottom of the newly added concrete column and the like.

Description

Concrete floor stand node connection structure
Technical Field
The utility model relates to the technical field of building structure reinforcement and reconstruction, in particular to a concrete floor upright post node connecting structure.
Background
With the continuous development of social economy, the use requirements of people on the existing buildings are changed, such as adding a new layer of use space to the original building, adding a single-layer corridor between two buildings and the like. For the newly-added single-layer structure, in order to meet the design aesthetic feeling of the professions such as buildings, landscapes and the like, the newly-added frame columns of the structure can not fall on the original frame columns and the original frame beams, so that the newly-added frame columns need to be converted on the original concrete floor. For a single-layer newly-added structure with a small load, a method commonly adopted is to arrange a pillar pier at the bottom of a newly-added frame pillar as a foundation. However, the structural measures increase the load weight on the concrete floor, and the interface between the column pier and the original concrete floor is a new and old concrete connecting surface, so that shearing damage is easy to occur under the action of horizontal force, and the structural safety is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a concrete floor upright post node connecting structure.
The purpose of the utility model can be realized by the following technical scheme:
a concrete floor column joint connection structure comprises a newly-added concrete column, a main steel beam arranged at the column bottom of the newly-added concrete column in the short span direction and a secondary steel beam arranged at the column bottom of the newly-added concrete column in the long span direction, wherein the newly-added concrete column is provided with a newly-added concrete column longitudinal rib, the main steel beam and the secondary steel beam are respectively connected with an original concrete structure, and the main steel beam and the secondary steel beam are connected with a concrete floor through a plurality of U-shaped hoops.
Preferably, the main steel beam and the secondary steel beam are arranged in an orthogonal direction and are in rigid connection.
Preferably, the line stiffness ratio of the main steel beam to the newly added concrete column is not less than 3.
Preferably, the upper flange of the main steel beam is provided with a longitudinal bar reserved hole for installing a longitudinal bar of the newly-added concrete column, and the longitudinal bar of the newly-added concrete column penetrates through the concrete floor and the longitudinal bar reserved hole and then is welded on the lower flange of the main steel beam.
Preferably, the newly-added concrete column longitudinal ribs and the lower flange of the main steel beam are welded in a double-sided bending mode.
Preferably, the top of each U-shaped hoop is welded to a horizontal steel bar of the concrete floor slab, and the bottom of each U-shaped hoop is welded to the lower flanges of the main steel beam and the secondary steel beam.
Preferably, the distance between the U-shaped hoops is not more than 200mm within the range of 1.5 times of the beam height at two sides of the connection area of the newly added concrete column and each steel beam and the original concrete, and the distance between the U-shaped hoops is not more than 400mm in the area outside the range of 1.5 times of the beam height at two sides of the connection joint of the newly added concrete column and each steel beam.
Preferably, the width of one side of the upper flange of the main steel beam is 50mm larger than the width of the same side of the newly-added concrete column.
Preferably, the length of the double-sided bent welding of the newly added concrete column longitudinal rib and the lower flange of the main steel beam is not less than five times of the outer diameter of the newly added concrete column longitudinal rib, and the diameter of the newly added concrete column longitudinal rib is not more than 1/20 of the clear distance between the upper flange and the lower flange of the main steel beam.
Preferably, the main steel beam is connected with the end part of the original concrete structure by adopting a counter-pulling steel plate.
Compared with the prior art, the utility model has the following beneficial effects:
1) the concrete floor column joint connection structure comprises a main steel beam arranged in the column bottom short span direction of a newly added concrete column, a secondary steel beam arranged in the column bottom long span direction and a U-shaped hoop used for connecting the main steel beam and a concrete floor, plate type conversion can be converted into beam type conversion, the concrete floor can be effectively prevented from punching damage under the newly added column load, and the structural safety redundancy is greatly improved;
2) the upper flange of the main steel beam is provided with a reserved hole for installing a longitudinal bar of a newly added concrete column, the longitudinal bar of the newly added concrete column penetrates through the concrete floor and the upper flange of the main steel beam, and is welded with the lower flange of the main steel beam after being bent at the position of the lower flange of the main steel beam, so that the effective transmission of the bending moment of the column bottom of the newly added concrete column can be ensured;
3) the main steel beam and the secondary steel beam are hinged with the existing concrete beam, and the end part of the main steel beam is connected with the existing concrete beam through the counter-pulling steel plate, so that the problem that the connecting bolt of the main steel beam and the existing concrete beam is pulled and pulled out to lose efficacy under the action of bending moment can be effectively avoided;
4) the concrete floor upright post joint connecting structure has the advantages of simple structure, clear stress and convenient construction.
Drawings
FIG. 1 is a schematic structural view of a concrete floor column joint connection structure in an embodiment;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;
the reference numbers in the figures indicate:
1. newly adding a concrete column; 11. newly adding concrete column longitudinal ribs; 2. a main steel beam; 21. reserving holes on the longitudinal bars; 3. a secondary steel beam; 4. a U-shaped hoop; 5. a concrete floor slab; 51. horizontal steel bars of a concrete floor; 6. structural adhesive; 7. and (5) fine aggregate concrete.
Detailed Description
The utility model is described in detail below with reference to the figures and specific embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
Examples
As shown in fig. 1 to 3, the present invention relates to a concrete floor column joint connection structure, which includes a main steel beam 2 disposed in a column bottom short span direction of a newly added concrete column 1, a sub steel beam 3 disposed in a column bottom long span direction, and a U-shaped hoop 4 for connecting the main steel beam 2 and a concrete floor 5, the sub steel beam 3 and the concrete floor 5.
In order to reduce the effect of the main steel beam 2 under the load of the newly added concrete column 1, the main steel beam 2 is preferably arranged in the short span direction of the column bottom of the newly added concrete column 1. Namely, one end of the main steel beam 2 is positioned in the short span direction of the column bottom of the newly added concrete column 1, and the other end is connected with the original concrete structure. One end of the secondary steel beam 3 is positioned in the long span direction of the column bottom of the newly added concrete column 1, and the other end of the secondary steel beam is connected with the original concrete structure. In order to balance the column bottom bending moment of the newly added concrete column 1, the main steel beam 2 and the secondary steel beam 3 are respectively arranged at the column bottom of the newly added concrete column 1 along the orthogonal direction, and the main steel beam 2 and the secondary steel beam 3 are preferably in rigid connection. In order to ensure the embedding and fixing effect of the main steel beam 2 on the newly added concrete column 1, the linear stiffness ratio of the main steel beam 2 to the newly added concrete column 1 is preferably set to be not less than 3.
The main steel beam 2 and the secondary steel beam 3 are connected with the existing concrete beam in a hinged mode, and the actual hinged joint structure inevitably has partial rotation constraint, so that tension exists on an upper bolt of the hinged joint, and in order to prevent the main steel beam 2 and the existing concrete beam connecting bolt from being pulled and pulled out to fail under the action of bending moment, the other end of the main steel beam 2 is connected with the original concrete structure (the existing concrete beam) through a counter-pulling steel plate.
As shown in fig. 2 and 3, in order to ensure effective transmission of the bending moment at the column bottom of the newly added concrete column 1, a longitudinal rib preformed hole 21 is formed in the upper flange of the main steel beam 2 and used for installing a longitudinal rib 11 of the newly added concrete column. The newly-added concrete column longitudinal bar 11 penetrates through the concrete floor 5 and the upper flange of the main steel beam 2, and is welded with the lower flange of the main steel beam 2 after being bent at the lower flange of the main steel beam 2. The bending section of the newly-added concrete column longitudinal rib 11 is suitable for being welded with the two sides of the lower flange of the main steel beam 2, the welding length is not suitable to be less than 5d, and d is the outer diameter size of the newly-added concrete column longitudinal rib 11. In order to ensure the effective anchoring of the newly added concrete column longitudinal bar 11 in the range of the main steel beam 2, the diameter of the newly added concrete column longitudinal bar 11 is not larger than 1/20 of the net distance between the upper flange and the lower flange of the main steel beam 2. In order to protect the added concrete column longitudinal ribs 11 between the upper flange and the lower flange of the main steel beam 2 and the secondary steel beam 3, the added concrete column 1 is preferably poured by adopting the fine aggregate concrete 7 in the projection area of the range.
As shown in fig. 2, in order to prevent the outside of the hole from being crushed or torn by the horizontal force after the upper flange of the main steel beam 2 is perforated, the width of one side of the upper flange of the main steel beam 2 is preferably 50mm larger than the width of the same side of the newly added concrete column 1.
As shown in fig. 3, in order to ensure effective connection between the main steel beam 2 and the secondary steel beam 3 and the concrete floor 5, a plurality of U-shaped hoops 4 are arranged between the lower flanges of the main steel beam 2 and the secondary steel beam 3 and the concrete floor 5, the top of each U-shaped hoop 4 is welded with the concrete floor horizontal steel bar 51 of the concrete floor 5, and the bottom is welded with the lower flanges of the main steel beam 2 and the secondary steel beam 3. And meanwhile, structural adhesive 6 is injected into the upper flange of each steel beam and the bottom of the concrete floor 5 to serve as two defense lines for ensuring the tight connection of each steel beam and the concrete floor 5.
In the present embodiment, as a preferable scheme, the distance between the U-shaped hoops 4 is not more than 200mm in the range of 1.5 times of the beam height on both sides of the newly added concrete column 1 and the end of each steel beam (the end of each steel beam refers to the connecting area between each steel beam and the original concrete), and is not more than 400mm in other areas (the areas outside the range of 1.5 times of the beam height on both sides of the newly added concrete column 1 and the connecting node between the main steel beam and the secondary steel beam).
The utility model can be implemented by adopting the following construction steps:
1) manufacturing a main steel beam and a secondary steel beam according to design requirements, and reserving longitudinal rib holes in the main steel beam;
2) chiseling reinforcing steel bar holes at the positions where the newly-added column longitudinal bars penetrate through the concrete floor slab;
3) coating structural adhesive on the top of the upper flange of the main steel beam;
4) the newly added column longitudinal bars penetrate through the upper flange preformed holes of the main steel beams and are connected with the lower flange through-holes in a plug welding mode;
5) and (3) penetrating a sub-component consisting of the main steel beam and the newly-added column longitudinal ribs through the holes drilled on the concrete floor from bottom to top, and bonding the upper flange of the main steel beam with the bottom of the concrete floor.
6) Installing a temporary support at the bottom of the main steel beam, and constructing a connecting node of the end part of the main steel beam and the existing concrete beam according to design requirements;
7) manufacturing and installing a secondary steel beam according to design requirements, brushing structural adhesive on the top of an upper flange of the secondary steel beam, and installing a temporary support at the bottom of the secondary steel beam;
8) manufacturing and installing a U-shaped hoop according to design requirements, and welding the U-shaped hoop with a horizontal steel bar of the concrete floor at the top of the concrete floor;
9) binding the newly added column longitudinal bars and the U-shaped hoops, pouring concrete to form a substructure, and then performing subsequent construction work.
While the utility model has been described with reference to specific embodiments, the utility model is not limited thereto, and those skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope of the utility model. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a concrete floor stand node joint construction, its characterized in that, including newly-increased concrete column (1), set up main girder steel (2) of direction and the secondary girder steel (3) of direction are striden to the length of setting at the column bottom of newly-increased concrete column (1) short of column bottom, newly-increased concrete column (1) is equipped with newly-increased concrete column and indulges muscle (11), main girder steel (2) secondary girder steel (3) are connected with former concrete structure respectively, main girder steel (2) secondary girder steel (3) are connected through a plurality of U-shaped hoops (4) with concrete floor (5).
2. The concrete floor column joint connection structure of claim 1, wherein the main steel beam (2) and the secondary steel beam (3) are arranged in an orthogonal direction and are rigidly connected with each other.
3. The concrete floor column joint connection structure of claim 2, wherein the linear stiffness ratio of the main steel beam (2) to the newly added concrete column (1) is not less than 3.
4. The concrete floor column joint connection structure according to claim 1, wherein the upper flange of the main steel beam (2) is provided with a longitudinal bar reserved hole (21) for installing a new concrete column longitudinal bar (11), and the new concrete column longitudinal bar (11) is welded on the lower flange of the main steel beam (2) after passing through the concrete floor (5) and the longitudinal bar reserved hole (21).
5. The concrete floor column joint connection structure of claim 1, wherein the added concrete column longitudinal ribs (11) and the lower flanges of the main steel beams (2) are welded by double-sided bending.
6. The concrete floor column joint connection structure according to claim 1, wherein the top of each U-shaped hoop (4) is welded to the concrete floor horizontal reinforcement (51) of the concrete floor (5), and the bottom of each U-shaped hoop (4) is welded to the lower flanges of the main steel beam (2) and the secondary steel beam (3).
7. The concrete floor column joint connection structure according to claim 6, wherein the distance between the U-shaped hoops (4) is not more than 200mm within the range of 1.5 times of the beam height of the newly added concrete column (1) and the two sides of the joint area of the steel beams and the original concrete, and the distance between the U-shaped hoops (4) is not more than 400mm outside the range of 1.5 times of the beam height of the newly added concrete column (1) and the two sides of the joint area of the steel beams.
8. The concrete floor column node connection structure of claim 1, wherein the width of the upper flange of the main steel beam (2) on one side is 50mm larger than the width of the newly added concrete column (1) on the same side.
9. The concrete floor column joint connection structure of claim 5, wherein the double-sided bending welding length of the added concrete column longitudinal rib (11) and the lower flange of the main steel beam (2) is not less than five times of the outer diameter of the added concrete column longitudinal rib (11), and the diameter of the added concrete column longitudinal rib (11) is not more than 1/20 of the clear distance between the upper flange and the lower flange of the main steel beam (2).
10. The concrete floor column joint connection structure of claim 1, wherein the ends of the main steel beams (2) connected with the original concrete structure are connected by using counter-pulling steel plates.
CN202120823049.2U 2021-04-21 2021-04-21 Concrete floor stand node connection structure Active CN215858253U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120823049.2U CN215858253U (en) 2021-04-21 2021-04-21 Concrete floor stand node connection structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120823049.2U CN215858253U (en) 2021-04-21 2021-04-21 Concrete floor stand node connection structure

Publications (1)

Publication Number Publication Date
CN215858253U true CN215858253U (en) 2022-02-18

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ID=80319176

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120823049.2U Active CN215858253U (en) 2021-04-21 2021-04-21 Concrete floor stand node connection structure

Country Status (1)

Country Link
CN (1) CN215858253U (en)

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