Vierendeel truss type superposed beam with pipeline hole

Abstract

The utility model discloses an open-web truss type composite beam with a pipeline hole, which comprises a composite beam prefabricated lower chord member, a composite beam cast-in-place upper chord member and a composite beam cast-in-place vertical web member, and the composite beam cast-in-place vertical web member and the composite beam cast-in-place upper chord member are formed on the composite beam prefabricated lower chord member through a cast-in-place process. The composite beam prefabricated lower chord member, the composite beam cast-in-place vertical web member and the composite beam cast-in-place upper chord member jointly form an open-web truss type composite beam, and an open-web part on the open-web truss type composite beam is provided with a hole for an equipment pipeline to penetrate through. The inverted-T-shaped structural design is adopted, the flange is provided with the lifting lugs, the prefabricated laminated slab can be just placed on the lifting lugs of the flange, and a temporary support in the construction stage is provided for the laminated slab. The frame beams in the main stress direction only need to be prefabricated, steel bar crossing at beam column joints is avoided, and construction is simplified.

Description

Technical Field

[0001] The utility model discloses an assembled building structure, in particular to a hollow truss type composite beam with pipeline openings, belonging to the technical field of construction engineering. Background Art

[0002] A prefabricated garage is a prefabricated building structure typically assembled on-site from prefabricated components. These structures are typically constructed from steel, concrete, or other durable materials. Advantages of prefabricated garages include fast construction, relatively low costs, easy quality control, and high flexibility. The construction process typically begins with design and fabrication, followed by the delivery of prefabricated components to the site for assembly and installation by a specialized construction team. Compared to traditional on-site construction, this method can significantly shorten construction timelines and reduce site disruption and waste. Furthermore, prefabricated garages can be disassembled and reassembled later, offering a degree of portability and reusability.

[0003] Prefabricated garages in the prior art are usually assembled from columns, beams, and composite slabs. Conventional prefabricated composite beams are usually rectangular in design, the same width as the cast-in-place parts, or have no ears. During the construction phase, temporary supports cannot be provided for secondary beams and floor slabs, causing many inconveniences during the construction of prefabricated garages. Conventional frame main beams are cast-in-place, and the strength of steel bars and concrete is relatively low. Openings in the beams significantly weaken the overall stiffness of the beams, resulting in larger requirements for calculated beam cross-sections and uncontrollable strengthening measures through openings. If openings in the beams are not considered, all equipment pipelines must run along the bottom of the beams. If openings are made in composite beams, the material strength is controlled by factory batch production, and the equipment pipelines can utilize the openings in the beams. Summary of the Invention

[0004] In response to the shortcomings of the above-mentioned prior art that the prefabricated composite beams adopt a rectangular design or have no cantilever ears, and cannot provide temporary supports for secondary beams and floor slabs, the utility model provides a hollow truss composite beam with pipeline openings, which adopts an inverted T-shaped structure design and has cantilever ears at the flanges. The prefabricated composite panels can be placed on the flange cantilever ears to provide temporary supports for the composite panels during the construction phase.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a hollow truss type composite beam with a pipeline opening, the composite beam comprising a precast lower chord of the composite beam, a cast-in-place upper chord of the composite beam and a cast-in-place vertical web of the composite beam, the cast-in-place vertical web of the composite beam and the cast-in-place upper chord of the composite beam are formed on the precast lower chord of the composite beam by a cast-in-place process, the precast lower chord of the composite beam, the cast-in-place vertical web of the composite beam and the cast-in-place upper chord of the composite beam together constitute a hollow truss type composite beam, and the hollow position of the hollow truss type composite beam is provided with an opening for passing equipment pipelines.

[0006] The technical solution adopted by the utility model to solve its technical problems further includes:

[0007] The prefabricated lower chord of the composite beam includes a prefabricated lower chord body, top exposed steel bars, a steel cage, four corner steel bars, side exposed steel bars, top reinforcing steel bars and bottom reinforcing steel bars. The steel cage and the four corner steel bars are tied together to form a supporting body. Concrete is poured in the supporting body to form a prefabricated lower chord body. The top exposed steel bars are arranged in the prefabricated lower chord body, and part of them extend to the outside of the top of the prefabricated lower chord body. The top surface of the prefabricated lower chord body corresponds to two sides of the top exposed steel bars to form a cantilever. The side exposed steel bars, top reinforcing steel bars and bottom reinforcing steel bars are all arranged parallel to the length direction of the prefabricated lower chord body. The side exposed steel bars and bottom reinforcing steel bars are arranged at the bottom inside the steel cage, and the top reinforcing steel bars are arranged at the top inside the steel cage.

[0008] The prefabricated lower chord of the composite beam further comprises a middle reinforcing steel bar, which is arranged at the middle position inside the steel cage.

[0009] The intermediate reinforcing steel bars are arranged in more than one row, with more than one steel bar in each row.

[0010] The width of the prefabricated lower chord body is greater than 200 mm, and the height is greater than 250 mm.

[0011] The steel cage is surrounded by a rectangular structure, and four steel bars are arranged at the four corners, respectively corresponding to the four corners of the steel cage.

[0012] There are four exposed top steel bars and four top reinforcing steel bars, and the top reinforcing steel bars are arranged corresponding to the exposed top steel bars.

[0013] There are four side exposed steel bars and one to four bottom reinforcing steel bars. The side exposed steel bars are arranged at the positions corresponding to the top reinforcing steel bars, and the bottom reinforcing steel bars are arranged between adjacent side exposed steel bars. One or two bottom reinforcing steel bars are arranged between the side exposed steel bars, or no bottom reinforcing steel bars are arranged.

[0014] A key groove is provided at the middle position of the end surface of the prefabricated lower chord main body.

[0015] The keyway width is not less than 1 / 2 of the prefabricated part of the composite beam, and the keyway height is not less than 1 / 2 of the prefabricated part of the composite beam.

[0016] The beneficial effects of the present invention are as follows: the present invention adopts an inverted T-shaped structural design, with lugs provided at the flanges. The lugs are precisely positioned to accommodate prefabricated composite panels, providing temporary supports for the composite panels during the construction phase. The present invention only requires the prefabrication of the frame beams in the main load-bearing direction, thus avoiding cross-reinforcement at the beam-column joints and simplifying construction.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a side structural diagram of the prefabricated lower chord main body in the utility model.

[0019] Figure 2 This is a schematic cross-sectional structure diagram of a first embodiment of the prefabricated lower chord main body in a non-civil air defense area of ​​the present invention.

[0020] Figure 3 This is a schematic cross-sectional structure diagram of the second embodiment of the prefabricated lower chord main body in the non-civil defense area of ​​the present invention.

[0021] Figure 4 This is a schematic cross-sectional structure diagram of the third embodiment of the prefabricated lower chord main body in the non-civil defense area of ​​the present invention.

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the opening position of the prefabricated lower chord main body in the non-civil defense area of ​​the utility model.

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of the prefabricated lower chord main body in the non-civil air defense area of ​​the present invention without a hole.

[0024] Figure 7 This is a schematic diagram of the front view structure of the prefabricated lower chord main body in the non-civil defense area of ​​the utility model.

[0025] Figure 8 This is a schematic cross-sectional structure diagram of a first embodiment of the prefabricated lower chord main body of the civil air defense area in the present invention.

[0026] Figure 9 This is a schematic cross-sectional structure diagram of the second embodiment of the prefabricated lower chord main body in the civil air defense area of ​​the present invention.

[0027] Figure 10 This is a schematic diagram of the cross-sectional structure of the opening position of the prefabricated lower chord main body in the civil air defense area of ​​the present invention.

[0028] Figure 11 This is a schematic diagram of the cross-sectional structure of the prefabricated lower chord main body in the civil air defense area of ​​the present invention without a hole.

[0029] Figure 12 This is a schematic diagram of the front view structure of the prefabricated lower chord rod main body in the civil defense area of ​​the utility model.

[0030] Figure 13 This is a schematic diagram of the composite beam structure in the utility model.

[0031] In the figure, 1-precast lower chord body, 2-top exposed steel bars, 3-cantilever, 4-keyway, 5-side exposed steel bars, 6-rebar cage, 7-corner steel bars, 8-middle reinforcement steel bars, 9-top reinforcement steel bars, 10-bottom reinforcement steel bars, 11-opening, 12-frame column, 13-precast lower chord of composite beam, 14-cast-in-place upper chord of composite beam, 15-cast-in-place vertical web members of composite beam. DETAILED DESCRIPTION

[0032] This embodiment is a preferred implementation of the present utility model. Other embodiments whose principles and basic structures are the same or similar to those of this embodiment are within the protection scope of the present utility model.

[0033] Please refer to the attached Figure 1 To the attached Figure 12 The utility model mainly protects a hollow truss type composite beam with a pipeline opening, the composite beam includes a precast lower chord 13 of the composite beam, a cast-in-place upper chord 14 of the composite beam and a cast-in-place vertical web 15 of the composite beam. The cast-in-place vertical web 15 of the composite beam and the cast-in-place upper chord 14 of the composite beam are formed on the precast lower chord 13 of the composite beam by a cast-in-place process. The precast lower chord 13 of the composite beam, the cast-in-place vertical web 15 of the composite beam and the cast-in-place upper chord 14 of the composite beam together constitute a hollow truss type composite beam. The hollow position of the hollow truss type composite beam is provided with an opening 11 for passing the equipment pipeline.

[0034] In this embodiment, the prefabricated lower chord of the composite beam mainly includes a prefabricated lower chord body 1, top exposed steel bars 2, a steel cage 6, four corner steel bars 7, side exposed steel bars 5, middle reinforcing steel bars 8, top reinforcing steel bars 9 and bottom reinforcing steel bars 10. The steel cage 6 and the four corner steel bars 7 are tied together to form the supporting body of the prefabricated lower chord of the composite beam in the present invention. Concrete is poured into the supporting body to form the prefabricated lower chord body 1. The top exposed steel bars 2 are arranged in the prefabricated lower chord body 1, and part of them extend to the outside of the top of the prefabricated lower chord body 1. A cantilever 3 is formed on both sides of the top surface of the prefabricated lower chord body 1 corresponding to the top exposed steel bars 2 for placing the prefabricated composite plate. In this embodiment, the cantilever 3 should be interpreted in a broad sense. In addition to the ones shown in this embodiment, In addition to conventional cantilever structures, other side protruding structures can also be used. As long as they can be used to place and support the structure of prefabricated panels, they should be understood as the cantilever structures in the present invention. The side exposed steel bars 5, the middle reinforcing steel bars 8, the top reinforcing steel bars 9 and the bottom reinforcing steel bars 10 are all arranged parallel to the length direction of the prefabricated lower chord main body 1. The side exposed steel bars 5 and the bottom reinforcing steel bars 10 are arranged at the bottom inside the steel cage 6, the middle reinforcing steel bars 8 are arranged in the middle position inside the steel cage 6, and the top reinforcing steel bars 9 are arranged at the top inside the steel cage 6. There is one or more openings 11 on the prefabricated lower chord main body 1, which can be used for air ducts and water and electricity pipelines, etc. The prefabricated composite beam in the present invention adopts an inverted T-shaped structure design, and the cantilever 3 of the flange can be used to place prefabricated composite panels.

[0035] In this embodiment, the width of the prefabricated lower chord main body 1 is more than 200mm. In this embodiment, it is preferably 650mm~850mm, and the height is more than 250mm. In this embodiment, it is preferably 300~550mm. It can be determined according to needs. When it is used in non-civil defense areas, its width can be 800mm. When it is used in civil defense areas, its width can be 850mm. The height is preferably 450mm. If an opening 11 is opened at the corresponding position, the height of the corresponding position is preferably 350mm, that is, the opening 11 is opened at a height of 100mm on the prefabricated lower chord main body 1.

[0036] In this embodiment, the maximum structural dimensions of the opening 11 are 1600 mm in length and 400 mm in height, which can fully meet the requirements for the passage of general water, electricity, and equipment pipelines. The main cross beams on the upper and lower sides of the opening 11 have a concrete layer of at least 350 mm thick to ensure the strength of the composite beam body at the opening 11.

[0037] In this embodiment, the steel cage 6 is surrounded by a rectangular structure, and four corner steel bars 7 are provided, which are respectively provided at the four corners of the steel cage 6. The four corner steel bars 7 are preferably φ12 steel bars, that is, the diameter of the four corner steel bars 7 is preferably 12 mm.

[0038] In this embodiment, there are four exposed top steel bars 2 and four top reinforcing steel bars 9. The top reinforcing steel bars 9 are arranged corresponding to the exposed top steel bars 2. The top reinforcing steel bars 9 are preferably φ16 steel bars, that is, the diameter of the top reinforcing steel bars 9 is preferably 16 mm.

[0039] In this embodiment, more than one row of intermediate reinforcing steel bars 8 are provided, with more than one steel bar in each row. In this embodiment, fifteen to twenty-seven intermediate reinforcing steel bars 8 can be provided according to actual needs. Preferably, three rows are adopted, and five to nine steel bars can be provided in each row according to actual needs. The intermediate reinforcing steel bars 8 are preferably φ12.7 steel bars, that is, the diameter of the intermediate reinforcing steel bars 8 is preferably 12.7 mm.

[0040] In this embodiment, four side exposed steel bars 5 are provided, and one to four bottom reinforcing steel bars 10 are provided. The side exposed steel bars 5 are provided at positions corresponding to the top reinforcing steel bars 9, and the bottom reinforcing steel bars 10 are provided between adjacent side exposed steel bars 5. One, two, or no bottom reinforcing steel bars 10 may be provided between the side exposed steel bars 5. In this embodiment, the side exposed steel bars 5 and the bottom reinforcing steel bars 10 are preferably made of φ25 steel bars, that is, the diameter of the side exposed steel bars 5 and the bottom reinforcing steel bars 10 is preferably 25 mm.

[0041] In this embodiment, a key groove 4 is provided in the middle of the end face of the prefabricated lower chord main body 1. The width of the key groove 4 is not less than 1 / 2 of the prefabricated part of the composite beam, and the height is not less than 1 / 2 of the prefabricated part of the composite beam. In this embodiment, the key groove 4 is preferably 450 mm in width and 140 mm in height.

[0042] When the present invention is in use, after the prefabricated lower chord body 1 is hoisted to the top of the prefabricated column in place on site (usually overlapped on the prefabricated column body or the corbel of the prefabricated column body or other supporting structures of the prefabricated column body), the bottom reinforcement of the continuous beam is welded to each other, and the trough plate is hoisted to the ear 3 of the prefabricated lower chord body. Then, the next step of the construction of the cast-in-situ reinforced concrete layer of the beam and slab can be carried out. The composite beam prefabricated lower chord is formed with a composite beam cast-in-situ upper chord through a cast-in-situ process. The composite beam prefabricated lower chord and the composite beam cast-in-situ upper chord together constitute the composite beam body. The composite beam body is provided with an opening 11 for passing equipment pipelines. There is no need to support formwork for beam and slab construction. The prefabricated lower chord body 1 can be temporarily supported on the corbel of the prefabricated column, and the prefabricated trough plate can be temporarily supported on the ear 3 of the prefabricated lower chord body 1. The on-site installation is relatively efficient. The sealed grooved plate is directly supported on the prefabricated lower chord body 1 and serves as the side formwork of the composite beam, reducing the process of installing the formwork. The prefabricated part of the prefabricated lower chord body 1 is prefabricated with reserved steel bars waiting for pouring concrete.

[0043] The utility model adopts an inverted T-shaped structural design, with ears provided at the flanges, on which precast panels can be placed, providing temporary supports for the precast panels during the construction phase. The utility model only needs to consider the prefabrication of the frame beams in the main force direction, avoiding the crossing of steel bars at the beam-column nodes, and simplifying the construction. Equipment pipelines can utilize the openings to reduce the impact of pipelines on the net height of the bottom of the beam, and the consistency of the opening locations can ensure the safety of the beams. The utility model standardizes the production of the bottom concrete of the prefabricated lower chord body 1 and the related main force-bearing steel bars and opening reinforcement bars in the factory. After the trough plate is hoisted on site, it is only necessary to set the template inside the opening and the force-bearing bars on the top of the beam to complete the concrete pouring.

Claims

1. A hollow truss composite beam with pipeline openings, characterized by: The composite beam comprises a prefabricated lower chord (13) of the composite beam, a cast-in-situ upper chord (14) of the composite beam and a cast-in-situ vertical web (15) of the composite beam. The cast-in-situ vertical web (15) of the composite beam and the cast-in-situ upper chord (14) of the composite beam are formed on the prefabricated lower chord (13) of the composite beam by a cast-in-situ process. The prefabricated lower chord (13) of the composite beam, the cast-in-situ vertical web (15) of the composite beam and the cast-in-situ upper chord (14) of the composite beam together constitute a hollow truss composite beam. A hole (11) for passing equipment pipelines is provided at the hollow position of the hollow truss composite beam.

2. The hollow truss composite beam with pipeline openings according to claim 1 is characterized in that: The composite beam prefabricated lower chord comprises a prefabricated lower chord body (1), top exposed steel bars (2), a steel cage (6), four corner steel bars (7), side exposed steel bars (5), top reinforcing steel bars (9) and bottom reinforcing steel bars (10). The steel cage (6) and the four corner steel bars (7) are tied together to form a supporting body. Concrete is poured into the supporting body to form a prefabricated lower chord body (1). The top exposed steel bars (2) are arranged in the prefabricated lower chord body (1) and partially extend to the outside of the top of the prefabricated lower chord body (1). The top surface of the prefabricated lower chord body (1) forms a cantilever (3) on both sides corresponding to the top exposed steel bars (2). The side exposed steel bars (5), the top reinforcing steel bars (9) and the bottom reinforcing steel bars (10) are all arranged parallel to the length direction of the prefabricated lower chord body (1). The side exposed steel bars (5) and the bottom reinforcing steel bars (10) are arranged at the bottom inside the steel cage (6), and the top reinforcing steel bars (9) are arranged at the top inside the steel cage (6).

3. The hollow truss composite beam with pipeline openings according to claim 2, characterized in that: The prefabricated lower chord of the composite beam further comprises an intermediate reinforcing steel bar (8), and the intermediate reinforcing steel bar (8) is arranged at a middle position inside the steel cage (6).

4. The hollow truss composite beam with pipeline openings according to claim 3 is characterized in that: The intermediate reinforcing steel bars (8) are arranged in more than one row, with more than one steel bar in each row.

5. The hollow truss composite beam with pipeline openings according to claim 2, characterized in that: The prefabricated lower chord body (1) has a width of more than 200 mm and a height of more than 250 mm.

6. The hollow truss composite beam with pipeline openings according to claim 2, characterized in that: The steel cage (6) is surrounded by a rectangular structure, and four corner steel bars (7) are provided, which are respectively provided at the four corner positions of the steel cage (6).

7. The hollow truss composite beam with pipeline openings according to claim 2, characterized in that: There are four top exposed steel bars (2) and four top reinforcing steel bars (9), and the top reinforcing steel bars (9) are arranged corresponding to the top exposed steel bars (2).

8. The hollow truss composite beam with pipeline openings according to claim 2, characterized in that: The side exposed steel bars (5) are provided with four, and the bottom reinforcing steel bars (10) are provided with one to four. The side exposed steel bars (5) are provided at positions corresponding to the top reinforcing steel bars (9), and the bottom reinforcing steel bars (10) are provided between adjacent side exposed steel bars (5). One or two bottom reinforcing steel bars (10) are provided between the side exposed steel bars (5), or no bottom reinforcing steel bars (10) are provided.

9. The hollow truss composite beam with pipeline openings according to claim 2, characterized in that: A keyway (4) is provided at the middle position of the end surface of the prefabricated lower chord main body (1).

10. The hollow truss composite beam with pipeline openings according to claim 9, characterized in that: The keyway (4) has a width not less than 1 / 2 of the prefabricated portion of the composite beam, and a height not less than 1 / 2 of the prefabricated portion of the composite beam.

Images