Outer U-shaped steel reinforced concrete composite beam

Abstract

The utility model relates to the technical field of constructional engineering, in particular to an externally-wrapped U-shaped steel reinforced concrete composite beam. The externally-wrapped U-shaped steel reinforced concrete composite beam comprises a U-shaped beam, a containing cavity is formed in the U-shaped beam, and an opening is formed in the top end of the U-shaped beam so that concrete can be poured into the containing cavity from the opening; the multiple opposite-pulling pieces are arranged in the length direction of the U-shaped beams at intervals, and the two ends of the opposite-pulling pieces are connected with the U-shaped beams on the two sides of the opening correspondingly; and at least one shear-resistant steel bar is arranged on each opposite-pulling piece, and the shear-resistant steel bars are used for connecting the floor slab and the U-shaped beam. The production process flow of the U-shaped beam is simplified, the steel consumption and the labor cost are saved, and the production efficiency is improved. An existing anti-shearing stud is improved into the anti-shearing reinforcing steel bar with the opposite-pulling piece, the steel consumption can be reduced, the loading difficulty can be reduced, the loading space can be increased, and a floor slab formwork can be conveniently erected on site or a prefabricated floor slab can be conveniently placed on site.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to an externally encased U-shaped steel-concrete composite beam. Background Technology

[0002] The U-shaped steel-concrete composite beam is a new type of steel-concrete composite beam in which concrete is poured into U-shaped steel plates welded or cold-bent to form composite beam ribs, and shear connectors are used to combine the concrete flanges with the ribs, allowing the steel and concrete to work together. The shear connectors are the key components that combine the U-shaped steel and concrete flanges to work together. Besides preventing longitudinal slippage between the concrete flanges and the U-shaped steel, the shear connectors also prevent vertical separation between the concrete flanges and the U-shaped steel.

[0003] like Figures 1 to 2 As shown, the existing U-shaped beam ① is made by cutting elongated, waist-shaped holes at intervals on the beam surface of a rectangular steel tube. Its production process is as follows: steel plate → cold bending to form a round tube → extrusion into a rectangular steel tube → cutting elongated, waist-shaped holes on the beam surface → welding shear studs ③ to both sides of the elongated, waist-shaped holes on the beam surface. The elongated, waist-shaped holes on the beam surface are used for on-site pouring of concrete into the inner cavity of the U-shaped beam ①, and the steel plate between two elongated, waist-shaped holes prevents excessive lateral deformation of the beam's side steel plate during concrete pouring.

[0004] However, the existing U-shaped beam ① structure mentioned above has revealed several problems in practical applications:

[0005] 1. The lengthy production process not only requires extremely high precision and functionality of production equipment, but also a large amount of manpower. From raw material processing to the operation of each process, manual participation is indispensable, which undoubtedly greatly increases production costs and reduces production efficiency.

[0006] 2. In engineering applications, the thickness of the steel plate at the landing point of the shear stud ③ and the edge distance of the shear stud ③ are subject to specification restrictions. This means that the thickness of the steel plate and the width of the steel beam ① are not entirely determined by the stress requirements of the component itself, but are more influenced by the structural requirements of the shear stud ③, ultimately leading to an unnecessary increase in steel consumption.

[0007] 3. Because the shear studs ③ are welded onto the U-beam ① before it leaves the factory, the beam surface becomes uneven. During loading and transportation, this uneven beam surface not only increases the difficulty of loading operations but also makes it difficult to stack the beams compactly, reducing loading space and leading to increased transportation costs.

[0008] 4. During on-site construction, prefabricated components such as steel truss floor slabs ④ and profiled steel sheets need to be placed on the beam edges for a certain length to ensure stable installation. However, the shear studs ③ on both sides of the long, narrow opening of the U-shaped beam ① occupy the placement space, forcing additional construction measures to be taken on-site, such as welding supporting angle steel to the bottom of the beam edge slab. This not only increases the construction procedures and material costs, but may also affect the construction progress and project quality. Utility Model Content

[0009] The purpose of this utility model is to propose an externally encased U-shaped steel-concrete composite beam, which aims to solve the technical problems of the existing U-shaped beam production process being lengthy; the need for shear studs causing various restrictions on the thickness of the steel plate and the width of the steel beam; and the inconvenience of transporting the existing shear stud and U-shaped beam composite structure.

[0010] To achieve the above objectives, this utility model proposes an externally encased U-shaped steel-concrete composite beam, comprising a U-shaped beam with an internal cavity, and an opening at the top of the U-shaped beam for pouring concrete into the cavity through the opening.

[0011] A plurality of tie members are provided at intervals along the length direction of the U-shaped beam, and the two ends of the tie members are respectively connected to the U-shaped beam on both sides of the opening;

[0012] Shear reinforcement is provided on each of the tie members, and the shear reinforcement is used to connect the floor slab and the U-shaped beam.

[0013] Preferably, the shear reinforcement passes through the tie member and its bottom end extends into the receiving cavity.

[0014] Preferably, the U-shaped beam includes a first web, a second web, a bottom plate, a first flange, and a second flange. The first web and the second web are vertically spaced apart and parallel to each other. The two sides of the bottom plate are respectively connected to the bottom ends of the first web and the second web. The top end of the first web is bent towards the second web to form the first flange, and the top end of the second web is bent towards the first web to form the second flange. The opening is formed between the first flange and the second flange.

[0015] Preferably, the shear reinforcement is inverted U-shaped, and each tie member has at least one shear reinforcement.

[0016] Preferably, the shear reinforcement is cylindrical, and each tie member has at least two spaced shear reinforcements.

[0017] Preferably, the tie member is plate-shaped or cylindrical.

[0018] Preferably, the two ends of the pull member are welded and fixed to the ends of the first folded edge and the second folded edge, respectively.

[0019] Preferably, the two ends of the pull member are respectively connected to the upper surfaces of the first folded edge and the second folded edge;

[0020] Alternatively, the two ends of the pull member are respectively connected to the lower surfaces of the first folded edge and the second folded edge.

[0021] Preferably, the tie rod is welded and fixed to the shear reinforcement;

[0022] Alternatively, each of the tie members is provided with a mounting hole, the shear reinforcement is inserted into the mounting hole, and a fastener is sleeved on the outer wall of the shear reinforcement, the fastener overlapping the upper surface of the tie member.

[0023] Preferably, both the U-shaped beam and the tie rod are made of steel.

[0024] The U-shaped steel-concrete composite beam disclosed in this utility model has the following beneficial effects:

[0025] 1. Unlike existing shear studs, the improved structure of this scheme is a shear reinforcement with tie rods, which can save steel consumption, reduce loading difficulty, increase loading space, and make it easier to erect floor slab formwork or place precast floor slabs on site.

[0026] 2. The U-shaped beam includes a first web, a second web, a bottom plate, a first flange, and a second flange. The first web, the second web, and the bottom plate form a semi-enclosed U-shaped structure. The first flange and the second flange are formed by bending the top of the first web and the second web, respectively. This simplifies the production process of the U-shaped beam, saves steel consumption and labor costs, and improves production efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 A structural schematic diagram of a traditional externally encased U-shaped steel-concrete composite beam and floor slab;

[0029] Figure 2 This is a structural diagram of a traditional U-shaped steel beam and shear studs;

[0030] Figure 3This is a structural schematic diagram of the U-shaped steel-concrete composite beam and floor slab of this utility model;

[0031] Figure 4 This is a structural schematic diagram of the first embodiment of the U-shaped steel-concrete composite beam of this utility model;

[0032] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0033] Figure 6 This is a structural schematic diagram of a second embodiment of the U-shaped steel-concrete composite beam of this utility model;

[0034] Figure 7 This is a structural schematic diagram of the third embodiment of the U-shaped steel-concrete composite beam of this utility model;

[0035] Figure 8 This is a structural schematic diagram of the fourth embodiment of the U-shaped steel-concrete composite beam of this utility model;

[0036] Figure 9 This is a structural schematic diagram of the fifth embodiment of the U-shaped steel-concrete composite beam of this utility model;

[0037] Figure 10 This is a structural schematic diagram of the sixth embodiment of the U-shaped steel-concrete composite beam of this utility model;

[0038] Figure 11 This is a structural schematic diagram of the seventh embodiment of the U-shaped steel-concrete composite beam of this utility model;

[0039] Figure 12 This is a structural schematic diagram of the eighth embodiment of the U-shaped steel-concrete composite beam of this utility model;

[0040] Figure 13 This is an exploded view of the tie rods and shear reinforcement in the U-shaped steel-concrete composite beam of this utility model;

[0041] Figure 14 This is a structural schematic diagram of the tie rods and shear reinforcement in the U-shaped steel-concrete composite beam of this utility model.

[0042] In the attached diagram: 1-U-shaped beam, 11-accommodating cavity, 12-opening, 13-first web, 14-second web, 15-bottom plate, 16-first folded edge, 17-second folded edge, 2-tie member, 21-mounting hole, 3-shear reinforcement, 4-floor slab, 5-fixing member.

[0043] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0046] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0047] like Figures 1 to 14 As shown, an externally encased U-shaped steel-concrete composite beam includes a U-shaped beam 1 with an internal cavity 11. The top of the U-shaped beam 1 is provided with an opening 12 to pour concrete into the cavity 11 from the opening 12.

[0048] Tie members 2 are provided at intervals along the length of the U-shaped beam 1, and the two ends of the tie members 2 are respectively connected to the U-shaped beam 1 on both sides of the opening 12;

[0049] Shear reinforcement 3, each of the tie members 2 is provided with at least one shear reinforcement 3, the shear reinforcement 3 is used to connect the floor slab 4 and the U-shaped beam 1.

[0050] In this design, the floor slab 4 is typically positioned above the U-shaped beam 1, and is connected to the U-shaped beam 1 by shear reinforcement 3. During concrete pouring, the concrete enters the cavity 11 through the opening 12 at the top of the U-shaped beam 1 and solidifies. Since the improved U-shaped beam 1 has an opening 12 at its surface, if there are no tie measures at the opening 12, excessive lateral deformation is likely to occur on the side of the beam during on-site concrete pouring. Therefore, tie rods 2 need to be installed at intervals at the opening 12 according to actual engineering requirements.

[0051] Unlike existing technologies, this solution simplifies the production process of the U-shaped beam 1, saving steel consumption and labor costs, and improving production efficiency. The specific production process is as follows: steel plate → cold bending into a U-shaped beam 1 with an open beam surface and inwardly turned edges → welding tie rods 2 at intervals at the opening 12. The tie rods 2 can be welded in the factory and have pre-drilled rebar holes. Shear reinforcement 3 is then installed on the construction site according to the location of the rebar holes. Alternatively, the tie rods 2 and shear reinforcement can be pre-assembled into a single component in the factory, and the assembled component can be welded on the construction site.

[0052] This solution improves the existing shear studs into shear reinforcement bars 3 with tie rods 2. The shear reinforcement bars 3 are fixed by the bond force of the concrete inside the U-shaped beam 1 to the reinforcement bars. On the one hand, it can save steel consumption; on the other hand, the beam surface is flat when it leaves the factory, which reduces the difficulty of loading, increases the loading space, and reduces transportation costs. At the same time, it gives way to the space required for the precast floor slab 4, making it easier to set up floor slab formwork or place the precast floor slab 4 on site, reducing on-site construction measures.

[0053] Furthermore, the shear-resistant steel bar 3 passes through the tie member 2 and its bottom end extends into the receiving cavity 11.

[0054] like Figures 4 to 12 As shown, in this embodiment, the vertically arranged shear reinforcement 3 passes through the tie member 2, and the bottom end of the shear reinforcement 3 extends into the receiving cavity 11 of the U-shaped beam 1, while the top end extends into the floor slab 4. After the poured concrete has cured, the bottom end of the shear reinforcement 3 is located in the concrete inside the U-shaped beam 1, which plays a better tying role and improves the connection reliability between the floor slab 4 and the U-shaped beam 1.

[0055] Further, the U-shaped beam 1 includes a first web 13, a second web 14, a bottom plate 15, a first flange 16, and a second flange 17. The first web 13 and the second web 14 are vertically spaced apart and parallel to each other. The two sides of the bottom plate 15 are connected to the bottom ends of the first web 13 and the second web 14, respectively. The top end of the first web 13 is bent towards the second web 14 to form the first flange 16, and the top end of the second web 14 is bent towards the first web 13 to form the second flange 17. The opening 12 is formed between the first flange 16 and the second flange 17.

[0056] like Figures 4 to 12As shown, the U-shaped beam 1 in this embodiment specifically includes a first web 13, a second web 14, a bottom plate 15, a first folded edge 16, and a second folded edge 17. The first web 13, the second web 14, and the bottom plate 15 form a semi-enclosed structure, the interior of which is the receiving cavity 11. The first folded edge 16 and the second folded edge 17 are respectively bent from the top of the first web 13 and the second web 14. Overall, the U-shaped beam 1 of this solution can be made simply by bending the steel, without the need for additional hole-making processes, which can save manufacturing materials and reduce the manpower and material resources consumed by hole-making.

[0057] Furthermore, the shear reinforcement 3 is inverted U-shaped, and each tie member 2 is provided with at least one shear reinforcement 3.

[0058] like Figures 1 to 8 As shown, in this embodiment, the shear reinforcement 3 is inverted U-shaped. The upper arc-shaped structure is embedded in the concrete of the floor slab 4, and the two column-shaped structures in the lower part are embedded in the concrete of the U-shaped beam 1. Each tie member 2 can achieve good shear resistance by setting one shear reinforcement 3. Of course, in other scenarios, each tie member 2 can also be equipped with two or more shear reinforcements 3.

[0059] In other embodiments, the shear reinforcement 3 can also be adjusted to any other shape, such as a rectangular frame, as long as it can connect the U-shaped beam 1 and the floor slab 4 and prevent relative displacement between the two.

[0060] Furthermore, the shear reinforcement 3 is cylindrical, and each tie member 2 is provided with at least two spaced shear reinforcements 3.

[0061] like Figures 9 to 12 As shown, in this embodiment, the shear reinforcement 3 can also be two independent cylindrical steel bars. Similarly, each tie member 2 can be provided with two cylindrical shear reinforcements 3, or even three or more. Generally speaking, it is better to provide at least two cylindrical shear reinforcements 3 on the tie member 2 for better tie effect, but in some special cases, only one cylindrical shear reinforcement 3 can be provided on the tie member 2.

[0062] Furthermore, the tie member 2 is plate-shaped or cylindrical (i.e., the tie member 2 can be a steel plate or a reinforcing bar). In this solution, the tie member 2 can also be plate-shaped, cylindrical rod-shaped, or other different forms, as long as it can achieve a good fixing effect with the U-shaped beam 1.

[0063] Furthermore, the two ends of the tie member 2 are welded and fixed to the end of the first folded edge 16 and the end of the second folded edge 17, respectively.

[0064] like Figures 4 to 5 and Figure 9As shown, in order to ensure the structural stability of the tie member 2 and the U-shaped beam 1, it is preferable to weld the tie member 2 and the U-shaped beam 1 together. Specifically, the two ends of the tie member 2 are welded to the ends of the first fold 16 and the second fold 17 at the opening 12 respectively. In order to ensure better welding effect, both ends of the tie member 2 are provided with inclined surfaces (slits) to reserve space for welding. After being butt-welded with the U-shaped beam 1, the top surface of the tie member 2 and the U-shaped beam 1 are flush and will not affect the combination with other floor slab 4 mold products.

[0065] Furthermore, the two ends of the pull member 2 are respectively connected to the upper surfaces of the first folded edge 16 and the second folded edge 17;

[0066] Alternatively, the two ends of the pull member 2 are respectively connected to the lower surfaces of the first folded edge 16 and the second folded edge 17.

[0067] like Figures 6 to 8 and Figures 10 to 12 As shown, in this embodiment, the length of the tie member 2 can be wider than the opening 12 of the U-shaped beam 1, so that the tie member 2 is fixed on the upper surface of the first fold 16 or the second fold 17 (that is, the two sides of the tie member 2 are surrounded by fillet welds on three sides of the beam surface or the bottom of the U-shaped beam 1). The tie member 2 can be fixed to the first fold 16 / second fold 17 by welding or bolting. The protruding part of the tie member 2 can be resolved by avoiding other molds.

[0068] Furthermore, the tie member 2 is welded and fixed to the shear reinforcement 3; or, each tie member 2 is provided with an installation hole 21, the shear reinforcement 3 is inserted into the installation hole 21, and the outer wall of the shear reinforcement 3 is fitted with a fixing member 5, the fixing member 5 overlapping the upper surface of the tie member 2.

[0069] In this embodiment, there are multiple ways to fix the shear reinforcement 3 to the tie rod 2. The shear reinforcement 3 can be temporarily or permanently fixed after being inserted into the mounting hole 21 of the tie rod 2. When using the temporary fixing method, a fixing member 5 is fitted on the outer wall of the shear reinforcement 3, and the tie rod 2 is simply fixed by the fixing member 5. The fixing member 5 can be iron wire or other metal wire. The twisted thin iron wire can directly fix the shear reinforcement 3 in the mounting hole 21 of the tie rod 2. The two ends of the iron wire rest on the surface of the tie rod 2 to prevent the shear reinforcement 3 from moving downward. The shape is completed by subsequent concrete pouring. When using the permanent fixing method, the shear reinforcement 3 can be directly welded after being inserted into the mounting hole 21 of the tie rod 2. Of course, the shear reinforcement 3 can also be combined with the tie rod 2 to form an integral precast component during the production of the shear reinforcement 3, and then the tie rod 2 is fixed to the U-shaped beam 1 to form the final outer U-shaped steel-concrete composite beam.

[0070] The optimal structure of the external U-shaped steel-concrete composite beam in this embodiment is as follows: a plate-shaped tie rod 2 is welded on the U-shaped beam 1, and the two ends of the tie rod 2 are welded and fixed to the end of the first folded edge 16 and the end of the second folded edge 17, respectively. The tie rod 2 is provided with an inverted U-shaped shear reinforcement 3, which has good connection stability and shear resistance, and will not affect the combination of the external U-shaped steel-concrete composite beam with other floor slab 4 mold products.

[0071] Furthermore, both the U-shaped beam 1 and the tie rod 2 are made of steel. Steel has high tensile, compressive, bending, and shear strengths, which ensures that the U-shaped beam 1, tie rod 2, and shear reinforcement 3 are not easily deformed or damaged under long-term use when used as an outer U-shaped steel-concrete composite beam.

[0072] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An encased U-shaped steel reinforced concrete composite beam, characterized by, The utility model provides a kind of U-shaped beam (1), which comprises a receiving cavity (11) inside the U-shaped beam (1), and the top end of the U-shaped beam (1) is provided with an opening (12) to pour concrete into the receiving cavity (11) from the opening (12). A plurality of tension members (2) are arranged along the length direction of the U-shaped beam (1) at intervals, and the two ends of the tension member (2) are respectively connected to the U-shaped beam (1) on both sides of the opening (12). A shear reinforcement (3) is arranged on each tension member (2), and the shear reinforcement (3) is used to connect the floor slab (4) and the U-shaped beam (1). The shear reinforcement (3) passes through the tension member (2) and its bottom end extends into the receiving cavity (11).

2. The encased U-shaped steel reinforced concrete composite beam according to claim 1, characterized in that, The U-shaped beam (1) comprises a first web (13), a second web (14), a bottom plate (15), a first folded edge (16) and a second folded edge (17), the first web (13) and the second web (14) are vertically arranged at intervals and parallel to each other, the two sides of the bottom plate (15) are respectively connected to the bottom end of the first web (13) and the bottom end of the second web (14), the top end of the first web (13) is bent towards the second web (14) to form the first folded edge (16), the top end of the second web (14) is bent towards the first web (13) to form the second folded edge (17), and the first folded edge (16) and the second folded edge (17) form the opening (12).

3. The encased U-shaped steel reinforced concrete composite beam according to claim 1, characterized in that, The shear reinforcement (3) is in inverted U-shape, and at least one shear reinforcement (3) is arranged on each tension member (2).

4. The composite beam according to claim 1 or 2, wherein The shear reinforcement (3) is in cylindrical shape, and at least two shear reinforcements (3) are arranged on each tension member (2) at intervals.

5. The composite beam according to claim 1 or 2, wherein The tension member (2) is in plate shape or cylindrical shape.

6. The encased U-shaped steel reinforced concrete composite beam according to claim 1, wherein The two ends of the tension member (2) are respectively welded and fixed to the end of the first folded edge (16) and the end of the second folded edge (17).

7. The encased U-shaped steel reinforced concrete composite beam according to claim 3, wherein The two ends of the tension member (2) are respectively connected to the upper surfaces of the first folded edge (16) and the second folded edge (17).

8. The encased U-shaped steel reinforced concrete composite beam according to claim 3, wherein Alternatively, the two ends of the tension member (2) are respectively connected to the lower surfaces of the first folded edge (16) and the second folded edge (17). The tension member (2) is welded and fixed to the shear reinforcement (3).

9. The encased U-shaped steel reinforced concrete composite beam according to claim 1, wherein Alternatively, a mounting hole (21) is formed in each tension member (2), the shear reinforcement (3) is inserted into the mounting hole (21), and a fixing member (5) is sleeved on the outer wall of the shear reinforcement (3), and the fixing member (5) is overlapped on the upper surface of the tension member (2). The U-shaped beam (1) and the tension member (2) are made of steel.

10. The encased U-shaped steel reinforced concrete composite beam according to claim 1, wherein ​

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