CN110984469A - U-shaped steel-concrete combined beam lifting bar shearing resistant part and construction method thereof - Google Patents
U-shaped steel-concrete combined beam lifting bar shearing resistant part and construction method thereof Download PDFInfo
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- CN110984469A CN110984469A CN202010066052.4A CN202010066052A CN110984469A CN 110984469 A CN110984469 A CN 110984469A CN 202010066052 A CN202010066052 A CN 202010066052A CN 110984469 A CN110984469 A CN 110984469A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
Abstract
The invention discloses a U-shaped steel-concrete combined beam lifting bar shearing resistant part and a construction method thereof, wherein the U-shaped steel-concrete combined beam lifting bar shearing resistant part comprises a steel beam, a steel bar truss floor bearing plate and a novel lifting bar shearing resistant part; the steel beam is a U-shaped steel beam, and the bottom plates are arranged on two sides of the steel beam and fixedly connected with the steel beam; the steel bar truss is laid on the steel cross beam, and the lower chord steel bar of the steel bar truss is welded and connected with the upper flange of the steel cross beam; at least one fixed steel bar is distributed on the steel bar truss corresponding to the gap between the two upper flanges of the steel beam. The shear-resistant hanging bar is adopted to replace the stud, the shear-resistant hanging bar is directly hung on the fixed steel bar for simple binding, the workload of welding workers is reduced, meanwhile, the shear-resistant hanging bar cannot hinder subsequent construction operation after being fixed, and the construction cost is reduced on the basis of keeping the original effect.
Description
Technical Field
The invention relates to the field of structural beams for buildings, in particular to a U-shaped steel-concrete combined beam lifting bar shearing resistant part and a construction method thereof.
Background
In the building industry, a steel-concrete composite beam refers to a flexural member in which a steel beam and a concrete slab are integrally connected by a shear connector. When the steel beam is connected with the concrete floor, the steel beam is generally connected with the concrete floor by welding the shear connector at the upper flange of the H-shaped steel beam, the shear connector is also welded at the upper flange of the U-shaped steel beam to connect the steel beam with the concrete floor, the shear connector generally adopts studs, and angle steel and the like.
However, such a connection has certain problems: 1) the connection between the shear connectors and the steel beam is mainly completed by welding, and the number of the shear connectors is large, so that the workload of welding workers is increased; 2) the existing shear connector generally adopts studs, and the stud consumption is large, so that the construction cost is increased; 3) the thickness of the steel beam and the technology of a welder are required, if the welding technology is not good, the steel beam is easy to weld through, and particularly the U-shaped steel beam with the thinner steel beam is provided; 4) the presence of the studs or angle steel connections has a certain impact on other operations of the construction worker, such as the laying and tying of floor slab reinforcing bars.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to: the U-shaped steel-concrete combined beam hanging bar shear resistant part and the construction method thereof are provided to solve the technical problems that in the prior art, the shear resistant connecting part is large in welding workload, high in welding technical requirement, high in construction cost and capable of influencing other construction operations of construction workers.
In order to solve the technical problems, the invention adopts the following technical scheme:
a U-shaped steel-concrete combined beam lifting bar shearing resistant part comprises a steel beam and a steel bar truss floor bearing plate, wherein the steel bar truss floor bearing plate comprises a steel bar truss and a bottom plate. The steel beam is a U-shaped steel beam, and the upper side edges of the two side walls of the steel beam are respectively bent towards opposite directions and extend to form an upper flange. The bottom plate is horizontally arranged on two sides of the steel beam, is close to the upper flange of the steel beam and is fixedly connected with the steel beam. The steel bar truss is laid on the steel cross beam, the length direction of the steel bar truss is perpendicular to the length direction of the steel cross beam, the contact part of the steel bar truss and the steel cross beam is fixedly connected, and the lower side of the steel bar truss is fixedly connected with the bottom plate. At least one fixed steel bar is distributed on the steel bar truss corresponding to the gap between the two upper flanges of the steel beam, and the length direction of the fixed steel bar is consistent with that of the steel beam. The fixed steel bar is distributed with a plurality of shear-resistant hanging bars along the length direction, the middle parts of the shear-resistant hanging bars are hung on the fixed steel bar, and both ends of the shear-resistant hanging bars extend downwards and extend into the steel beam and then are bent to form bending sections. Concrete is poured into the steel cross beams, and concrete is also poured onto the steel bar trusses, so that the concrete and the steel bar trusses are integrally formed into the reinforced concrete floor slab. During actual construction, concrete is poured into the steel beam and the steel bar truss floor bearing plate, the steel bar truss and the anti-shearing hanging ribs are embedded into the concrete, the concrete in the steel beam and the concrete covering the steel bar truss form a whole through the anti-shearing hanging ribs, and the poured concrete is vibrated at the same time until the concrete is solidified.
In the prior art, when the steel beam is connected with the concrete floor, a plurality of shear-resistant studs are welded on the top of the steel beam, so that the welding workload is increased, and the welded shear-resistant studs erect at the top of the steel beam into a plurality of rows, which can hinder the subsequent construction operation of construction workers. And, the welding shear bolt nail has certain requirement to the thickness of girder steel, when using to new-type U shaped steel roof beam, because U shaped steel roof beam thickness is thinner, when carrying out the welding of shear bolt nail, to welder technical requirement higher, in case the condition of the girder steel of very easy cause welding to wear of misoperation.
In the invention, the shear-resistant hanging bar is adopted to replace the shear-resistant stud, the middle part of the shear-resistant hanging bar can be directly hung on the fixed steel bar, and the two ends of the shear-resistant hanging bar are positioned in the U-shaped steel beam. When using, can with plastics ribbon or steel wire anti-shear hang the muscle go on simply fixed can, need not carry out welding operation, this greatly reduced welding workman's work load, simultaneously, the fixed of the hanging muscle that shears can not lead to the fact the damage to the girder steel, can not lead to the fact the hindrance to the follow-up construction operation of construction workman after the hanging muscle that shears moreover is fixed. And the cost of the shear-resistant hanging rib is lower than that of the stud, and is only seven-fold of the cost of the stud, and the use of the shear-resistant hanging rib can well reduce the construction cost on the basis of keeping the original effect.
Further, the bottom plate is located below the upper flange of the steel beam. After the concrete is poured, part of the steel cross beams can be buried in the reinforced concrete floor, and then the steel cross beams for pouring the concrete and the reinforced concrete floor are integrated.
Furthermore, two ends of the shear-resistant hanging bar are respectively bent towards opposite directions to form bending sections. The inward bending of the two ends of the shear-resistant lifting rib enables the shape of the shear-resistant lifting rib to be similar to that of the stirrup, so that the steel beam after concrete pouring and the reinforced concrete floor can be integrated, and meanwhile, the shear strength can be improved.
Furthermore, two ends of the shear-resistant hanging bar are respectively bent towards opposite directions to form bending sections. The outward bending of shearing-resistant lifting bar both ends can make the girder steel after concrete placement and reinforced concrete floor form an organic whole, promote stability.
Furthermore, a plurality of connecting plates are distributed on the two upper flanges of the steel beam at intervals along the length direction of the steel beam, and two ends of each connecting plate are respectively fixedly connected with the two upper flanges of the steel beam. The connecting plate is used for strengthening the steel beam, and prevents that the concrete from producing the extrusion to the both sides of steel beam when carrying out concrete placement to lead to the steel beam to warp.
Further, the clearance between two upper flanges of the steel beam is not less than 60 mm.
Furthermore, the steel beam is a cold-bending formed U-shaped steel beam or a welding formed U-shaped steel beam. The U-shaped steel beam can be formed by cold bending of steel plates or welding of the steel plates.
A construction method of a U-shaped steel-concrete combined beam lifting bar shearing resistant part comprises the following steps:
(1) erecting a steel cross beam at a designed position according to construction design requirements, and temporarily fixing the steel cross beam;
(2) laying a steel bar truss floor bearing plate below the upper flange of the steel beam, fixedly connecting a bottom plate with the steel beam, and fixedly connecting the bottom plate with the steel beam through welding or angle steel;
(3) fixedly connecting a lower chord steel bar of the steel bar truss with an upper flange of the steel beam, wherein the contact part of the steel bar truss and the upper flange of the steel beam can be fixedly connected through welding;
(4) laying a plurality of fixed steel bars on the steel bar truss, so that at least one fixed steel bar is distributed on the steel bar truss at a position corresponding to a gap between two upper flanges of the steel beam, the length direction of the fixed steel bar is consistent with that of the steel beam, and the fixed steel bar is fixedly connected with the steel bar truss;
(5) hanging a plurality of shear-resistant hanging bars on the corresponding fixed steel bars at the gap position between the two upper flanges of the steel beam, so that the two ends of the shear-resistant hanging bars are positioned in the steel beam and are fixed;
(6) pouring concrete into the steel beam and on the steel bar truss floor bearing plate, pouring the concrete to design thickness, making the concrete cover steel bar truss and shear-resistant hanging bar completely, making the concrete in the steel beam and the concrete that covers the steel bar truss form wholly through shear-resistant hanging bar, carry out the compaction of vibrating to the concrete simultaneously, treat that the concrete solidifies can.
Compared with the prior art, the invention has the following beneficial effects:
1. the anti-shearing hanging bar is used as the anti-shearing connecting piece of the U-shaped steel beam and the concrete slab, the middle part of the anti-shearing hanging bar can be directly hung on the fixed steel bar and simply fixed by using the ribbon or the steel wire, and the fixing process is completely free from welding, so that the workload of welding workers in construction is greatly reduced, and the damage influence of welding operation on the steel beam is avoided;
2. the shear-resistant hanging bars are hung on the fixed steel bars, and cannot rise into several rows like the welded shear-resistant studs, so that the subsequent construction operation of construction workers is hindered;
3. the shear-resistant hanging bar has lower cost which is seven times of the cost of the shear-resistant stud, and the use of the shear-resistant hanging bar can well save the construction cost on the basis of ensuring the original effect.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.
In the figure: the steel beam comprises a steel beam 1, a bottom plate 2, a steel bar truss 3, a fixed steel bar 4 and a shear-resistant hanging steel bar 5.
Detailed Description
The invention will be further explained with reference to the drawings and the embodiments.
Example 1: referring to the attached drawing 1, the U-shaped steel-concrete combined beam lifting bar shearing resistant part comprises a steel beam 1 and a steel bar truss floor bearing plate, wherein the steel bar truss floor bearing plate comprises a steel bar truss 3 and a bottom plate 2. The steel beam 1 is a U-shaped steel beam arranged along the horizontal direction, and the upper side edges of the two side walls of the steel beam 1 are respectively bent towards the opposite direction and extend to form an upper flange. The steel beam 1 is a U-shaped steel beam formed by cold bending or a U-shaped steel beam formed by welding. The clearance between the two upper flanges of the steel beam 1 is not less than 60 mm.
The bottom plate 2 is horizontally arranged on two sides of the steel beam 1, is close to the upper flange of the steel beam 1 and is fixedly connected with the steel beam 1. In specific implementation, the bottom plate 2 is located below the upper flange of the steel beam 1. The steel bar truss 3 is laid on the steel beam 1, the length direction of the steel bar truss is perpendicular to that of the steel beam 1, the contact part of the steel bar truss 3 and the steel beam 1 is fixedly connected, and the lower side of the steel bar truss 3 is fixedly connected with the bottom plate. During actual assembly, the contact position of the steel bar truss 3 and the bottom plate 2 can be fixed through spot welding or bonding, steel bars can also be laid on the bottom plate 2, and then the steel bar truss 3 is laid on the steel bars and fixed through spot welding or bonding. The contact part of the steel bar truss 3 and the steel beam 1 can be fixedly connected through welding.
At least one fixed steel bar 4 is distributed on the steel bar truss 3 corresponding to the gap between the two upper flanges of the steel beam 1, and the length direction of the fixed steel bar 4 is consistent with the length direction of the steel beam 1. When the concrete implementation, fixed reinforcing bar 4 is a plurality of, and fixed reinforcing bar 4 is laid at steel bar truss 3 and through welding and steel bar truss 3 fixed connection.
A plurality of shear-resistant hanging ribs 5 are distributed on the fixed steel bar 4 along the length direction of the fixed steel bar, the middle parts of the shear-resistant hanging ribs 5 are hung on the fixed steel bar 4, and the two ends of the shear-resistant hanging ribs extend downwards and extend into the steel beam 1, and then are bent to form bending sections. During actual assembly, 5 accessible plastics ribbons of hanging muscle and fixed reinforcing bar 4 fixed connection shear, also can simply fix through other bonding modes can. And the two ends of the shear-resistant lifting rib 5 are respectively bent towards opposite directions to form bending sections. The bending section of the shear-resistant lifting rib 5 is arc-shaped, and the outward bending of the two ends of the shear-resistant lifting rib 5 can enable the steel beam 1 after concrete pouring and a reinforced concrete floor slab to be integrated, so that the stability is improved. Concrete is poured into the steel cross beam 1, so that the concrete and the steel bar truss 3 are integrally formed into a reinforced concrete floor, meanwhile, the concrete completely covers the steel bar truss 3 and the shear-resistant hanging ribs 5, and the steel cross beam 1 with the poured concrete and the reinforced concrete floor integrally formed with the steel bar truss 3 are connected into a whole through the shear-resistant hanging ribs 5. Concrete is also poured on the bottom plate 2, and the concrete on the bottom plate is poured to the upper side of the steel bar truss 3. In the actual pouring process, concrete is poured into the steel beam and the steel bar truss floor bearing plate, so that the steel bar truss and the shear-resistant hanging ribs are embedded into the concrete, and the poured concrete is vibrated at the same time until the concrete is solidified.
Example 2: referring to fig. 2, the basic structure is the same as that of embodiment 1, except that both ends of the shear-resistant hanger bar 5 are respectively bent toward opposite directions to form bent sections. The bending section of the shear-resistant hanging bar 5 is bent at a right angle, and the bending section is parallel to the part of the shear-resistant hanging bar 5 in the steel beam. The inward bending of the two ends of the shear-resistant hanging bar 5 enables the shape of the shear-resistant hanging bar to be similar to that of a stirrup, so that the steel beam 1 after concrete pouring and a reinforced concrete floor can be integrated, and meanwhile, the shear strength can be improved. And a plurality of connecting plates are distributed on the two upper flanges of the steel beam 1 at intervals along the length direction of the steel beam 1, and two ends of each connecting plate are fixedly connected with the two upper flanges of the steel beam 1 respectively. Two ends of the connecting plate are respectively fixedly connected with two upper flanges of the steel beam 1 through welding. The connecting plate is used for reinforcing the steel beam 1, and prevents that concrete from extruding two sides of the steel beam 1 when concrete is poured, so that the steel beam 1 is deformed.
Example 3: referring to fig. 3, the basic structure is the same as that of embodiment 1, except that two ends of the shear-resistant suspension bar 5 are respectively bent in opposite directions and at right angles to form bent sections, and the bent sections respectively extend in a direction perpendicular to the inner wall of the steel beam 1.
Example 4: during specific construction, the construction method of the U-shaped steel-concrete combined beam lifting bar shearing resistant part comprises the following steps:
(1) erecting a steel cross beam at a designed position according to construction design requirements, and temporarily fixing the steel cross beam;
(2) laying a steel bar truss floor bearing plate below the upper flange of the steel beam, fixedly connecting a bottom plate with the steel beam, and fixedly connecting the bottom plate with the steel beam through welding or angle steel;
(3) fixedly connecting the lower chord steel bar of the steel bar truss with the upper flange of the steel beam, wherein the contact part of the lower chord steel bar of the steel bar truss and the upper flange of the steel beam can be fixedly connected through welding;
(4) laying a plurality of fixed steel bars on the steel bar truss, so that at least one fixed steel bar is distributed on the steel bar truss at a position corresponding to a gap between two upper flanges of the steel beam, the length direction of the fixed steel bar is consistent with that of the steel beam, the contact position of the fixed steel bar and the steel bar truss is fixedly connected through spot welding, and the fixed steel bar and the steel bar truss can be fixed through adhesion during specific construction;
(5) hanging a plurality of shear-resistant hanging bars on the corresponding fixed steel bars at the gap position between the two upper flanges of the steel beam, so that the two ends of the shear-resistant hanging bars are positioned in the steel beam and are fixed, and the shear-resistant hanging bars can be fixed on the fixed steel bars through plastic ties;
(6) pouring concrete into the steel beam and on the steel bar truss floor bearing plate, pouring the concrete to design thickness, making the concrete cover steel bar truss and shear-resistant hanging bar completely, making the concrete in the steel beam and the concrete that covers the steel bar truss form wholly through shear-resistant hanging bar, carry out the compaction of vibrating to the concrete simultaneously, treat that the concrete solidifies can.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all that should be covered by the claims of the present invention.
Claims (8)
1. A U-shaped steel-concrete combined beam lifting bar shearing resistant part comprises a steel beam (1) and a steel bar truss floor bearing plate, wherein the steel bar truss floor bearing plate comprises a steel bar truss (3) and a bottom plate (2); the steel beam is characterized in that the steel beam (1) is a U-shaped steel beam, and the upper side edges of the two side walls of the steel beam (1) are respectively bent towards opposite directions and extend to form an upper flange; the bottom plates (2) are horizontally arranged on two sides of the steel cross beam (1), are close to the upper flange of the steel cross beam (1), and are fixedly connected with the steel cross beam (1); the steel bar truss (3) is laid on the steel beam (1), the length direction of the steel bar truss is vertical to that of the steel beam (1), the contact part of the steel bar truss (3) and the steel beam (1) is fixedly connected, and the lower side of the steel bar truss (3) is fixedly connected with the bottom plate; at least one fixed steel bar (4) is distributed on the steel bar truss (3) corresponding to the gap between the two upper flanges of the steel beam (1), and the length direction of the fixed steel bar (4) is consistent with that of the steel beam (1); a plurality of shear-resistant hanging ribs (5) are distributed on the fixed steel bar (4) along the length direction of the fixed steel bar, the middle parts of the shear-resistant hanging ribs (5) are hung on the fixed steel bar (4), and both ends of the shear-resistant hanging ribs extend downwards and extend into the steel beam (1) and then are bent to form bending sections; concrete is poured into the steel cross beam (1), so that the concrete and the steel bar truss (3) are integrally formed into a reinforced concrete floor slab; concrete is also poured on the bottom plate (2), and the concrete on the bottom plate (2) is poured to the upper side of the steel bar truss (3).
2. The U-section steel-concrete composite beam shear block according to claim 1, wherein the bottom plate (2) is located below an upper flange of the steel beam (1).
3. The U-shaped steel-concrete composite beam shear connector according to claim 1, wherein both ends of the shear resistant shear connector (5) are bent toward opposite directions to form bending sections.
4. The U-shaped steel-concrete composite beam shear connector according to claim 1, wherein both ends of the shear resistant shear connector (5) are bent in opposite directions to form bent sections.
5. The U-shaped steel-concrete composite beam lifting bar shearing resistant member of claim 1, wherein a plurality of connecting plates are distributed on two upper flanges of the steel beam (1) at intervals along the length direction of the steel beam (1), and two ends of each connecting plate are respectively fixedly connected with the two upper flanges of the steel beam (1).
6. The U-section steel-concrete composite beam shear of claim 1, wherein the gap between the two upper flanges of the steel cross beam (1) is not less than 60 mm.
7. The U-beam and concrete composite beam shear block according to claim 1, wherein the steel beam (1) is a cold-formed U-beam or a welded U-beam.
8. A construction method of the U-shaped steel-concrete composite beam lifting bar shearing resistant part as claimed in claims 1-7, characterized by comprising the following steps:
(1) erecting a steel cross beam at a designed position according to construction design requirements, and temporarily fixing the steel cross beam;
(2) laying a steel bar truss floor bearing plate below the upper flange of the steel beam, and fixedly connecting the bottom plate with the steel beam;
(3) fixedly connecting the lower chord steel bar of the steel bar truss with the upper flange of the steel beam;
(4) laying a plurality of fixed steel bars on the steel bar truss, so that at least one fixed steel bar is distributed on the steel bar truss at a position corresponding to a gap between two upper flanges of the steel beam, the length direction of the fixed steel bar is consistent with that of the steel beam, and the fixed steel bar is fixedly connected with the steel bar truss;
(5) hanging a plurality of shear-resistant hanging bars on the corresponding fixed steel bars at the gap position between the two upper flanges of the steel beam, so that the two ends of the shear-resistant hanging bars are positioned in the steel beam and are fixed;
(6) pouring concrete into the steel beam and on the steel bar truss floor bearing plate, pouring the concrete to design thickness, making the concrete cover the steel bar truss and the shear-resistant lifting bar completely, vibrating the concrete compactly simultaneously, and treating the concrete solidification can.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010066052.4A CN110984469A (en) | 2020-01-20 | 2020-01-20 | U-shaped steel-concrete combined beam lifting bar shearing resistant part and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010066052.4A CN110984469A (en) | 2020-01-20 | 2020-01-20 | U-shaped steel-concrete combined beam lifting bar shearing resistant part and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116341088A (en) * | 2023-05-30 | 2023-06-27 | 长沙泛一参数信息技术有限公司 | Automatic reinforcement distribution method for additional hanging reinforcement based on main beam and secondary beam positions and design parameters |
-
2020
- 2020-01-20 CN CN202010066052.4A patent/CN110984469A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116341088A (en) * | 2023-05-30 | 2023-06-27 | 长沙泛一参数信息技术有限公司 | Automatic reinforcement distribution method for additional hanging reinforcement based on main beam and secondary beam positions and design parameters |
| CN116341088B (en) * | 2023-05-30 | 2023-07-21 | 长沙泛一参数信息技术有限公司 | Automatic reinforcement distribution method for additional hanging reinforcement based on main beam and secondary beam positions and design parameters |
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