Beam structure and beam-column-slab connection structure of prefabricated buildings

Abstract

This utility model discloses a beam structure and a beam-column-slab connection structure for prefabricated buildings. The beam structure includes a concrete body with a first connecting bar protruding from its end. The bottom end of the first connecting bar is connected to the transverse beam reinforcement within the concrete body, and its top end is bolted to an external column structure. A beam connector for connecting to the external column structure is also provided at the bottom corner of the concrete body, and the beam connector and the first connecting bar are arranged vertically. The concrete body also has a second connecting bar protruding from its end. The bottom end of the second connecting bar is connected to the transverse beam reinforcement within the concrete body, and its top end is bolted to an external slab structure. The connection structure includes the aforementioned beam structure, as well as a column structure and a slab structure. The column structure consists of several column segments connected vertically from top to bottom. The ends of the beam structure are inserted into the grooves formed by the two connected column segments, and the beam structure and slab structure are bolted together. This design avoids irregular protrusions at the beam-column junction, resulting in a smoother and more aesthetically pleasing surface. It also achieves direct vertical load transfer and avoids on-site wet work.

Description

Technical Field

[0001] This utility model mainly relates to the field of prefabricated column technology, and in particular to the beam structure of prefabricated buildings and the beam-column-slab connection structure. Background Technology

[0002] Prefabricated construction refers to transferring a large amount of on-site work from traditional construction methods to factories. Prefabricated slabs, beams, columns, and walls are manufactured in factories, cured, and inspected before being transported to the construction site for assembly using reliable connection methods. It features industrialized production; factory-prefabricated components enable standardized design and large-scale production, reducing on-site construction waste and noise. It is also less affected by weather conditions, effectively shortening the construction cycle and offering significant advantages in environmental protection and construction efficiency. With the advancement of building industrialization, prefabricated construction is becoming an important development direction in the modern construction field.

[0003] In existing prefabricated concrete buildings, beams and columns are often connected by additional steel components (e.g., CN218091264U), or corbels are added to the columns to support the beams (e.g., CN217557176U). These added steel components or corbels create irregular protrusions at the beam-column junction, affecting the building's appearance. More importantly, these components protrude from the column structure, preventing direct vertical load transfer. The beam load must be transferred laterally through the steel components or corbels to the column before being transferred downwards, resulting in an unreasonable stress distribution in the beam-column connection. Furthermore, beams and slabs are typically connected by cast-in-place concrete, a wet-work process that is inefficient and difficult to implement. Utility Model Content

[0004] In order to solve the technical problems in the prior art, such as the impact of additional steel components or corbels on the appearance of buildings and the unreasonable stress of beam-column connection structures, as well as the low efficiency and high construction difficulty of on-site wet work, this utility model provides a beam structure and beam-column-slab connection structure for prefabricated buildings.

[0005] The following technical solution is adopted: The beam structure of the prefabricated building includes a concrete body. A beam-first connecting bar protrudes from the end of the concrete body. The bottom end of the beam-first connecting bar is connected to the transverse beam reinforcement within the concrete body, and its top end is bolted to the external column structure. A beam connector for connecting to the external column structure is also provided at the bottom corner of the concrete body. The beam connector and the beam-first connecting bar are arranged vertically. A second beam-second connecting bar also protrudes from the concrete body. The bottom end of the second beam-second connecting bar is connected to the transverse beam reinforcement within the concrete body, and its top end is bolted to the external slab structure. This design replaces the additional steel components or corbels used in existing technologies by bolting the beam-first connecting bar to the external column structure and connecting the beam connector to the external column structure. This avoids irregular protrusions at the beam-column junction, resulting in a smoother and more aesthetically pleasing building appearance. Simultaneously, the vertical arrangement of the beam connector and the beam-first connecting bar enables direct vertical load transfer, optimizing the structural stress state. Furthermore, the addition of connecting bars in the beam allows for rapid connection between the beam and slab via bolting, completely eliminating on-site wet work, significantly improving construction efficiency, and reducing construction difficulty.

[0006] The connecting reinforcement of the beam is configured as a hinged bolt, with its annular retaining ring fitted onto the beam's transverse reinforcement. This structure is convenient to operate, safe, and stable, and can be installed during the factory prefabrication stage. On-site assembly can be achieved quickly by simply tightening the bolts, avoiding the high-temperature operations and quality fluctuations associated with traditional welding.

[0007] The beam connector is cylindrical, with beam connection holes formed on its bottom wall for the reinforcing bars of the external column structure to pass through. The cylindrical shape and bottom wall openings provide an "insertion-anchoring" interface for the vertical reinforcement of the edge columns, and the cylindrical structure also provides working space for construction personnel. During construction, the vertical reinforcement of the edge columns can be directly inserted into the beam connection holes and bolted in place, achieving a reliable beam-column connection. This structure simplifies the construction process to a single "insertion-locking" step, effectively improving construction efficiency.

[0008] The connecting bars of the beam are configured as hinged bolts, with their annular fixing rings fitted onto the beam's transverse reinforcement. This structure is convenient to operate, safe, and stable, and can be installed during the factory prefabrication stage. On-site assembly can be achieved simply by tightening the bolts, avoiding the high-temperature operations and quality fluctuations associated with traditional welding.

[0009] The design incorporates a beam-column-slab connection structure, including the aforementioned beam structure, as well as column and slab structures. The column structure consists of several vertically connected column segments, with the ends of the beams inserted into grooves formed by the two connected column segments. The beam structure and slab structure are bolted together. This design replaces the additional steel components or corbels used in existing technologies by bolting the beam-first connecting reinforcement to the external column structure and connecting the beam connectors to the external column structure. This avoids irregular protrusions at the beam-column junction, resulting in a smoother and more aesthetically pleasing building appearance. Simultaneously, the vertical arrangement of the beam connectors and beam-first connecting reinforcement enables direct vertical load transfer, optimizing the structural stress state. Furthermore, the beam-second connecting reinforcement allows for rapid connection between the beam and slab via bolting, completely eliminating on-site wet work, significantly improving construction efficiency, and reducing construction difficulty.

[0010] The column segment includes a core column, with at least one side of the core column protruding to form a side column. The height difference between the top surface of the core column and the top surface of the side column is equal to the height of the beam structure, and the bottom surface of the core column is flush with the bottom surface of the side column. The bottom surface of the beam structure rests on the top surface of the lower side column, and its top surface is flush with the top surface of the lower core column, while the bottom surface of the upper side column rests on the top surface of the beam structure. This design matches the height of the external beam structure by matching the height difference between the top surfaces of the core column and the side column, allowing the top surface of the beam structure to be flush with the top surface of the core column when it is directly and stably placed on the side column. Since the bottom surface of the core column of the upper column segment is flush with the bottom surface of the side column, when its core column sits on the top surface of the core column of the lower column segment, the bottom surface of its side column can precisely press against the upper surface of the beam structure, thus providing bidirectional positioning for the beam structure. At this point, the load of the beam structure can be directly transferred downwards through the side columns to the next layer of beam structure and even to the foundation, achieving direct vertical load transfer without the need for lateral conversion. This avoids the unreasonable stress distribution situation in existing technologies where loads need to be transferred laterally, thus optimizing the force transmission path. Furthermore, since the side columns extend downwards to be flush with the bottom surface of the core column, there is no "suspended" structure, fundamentally solving the problem of irregular appearance.

[0011] The side column includes a concrete block, a column connector fixed below it, and vertical reinforcement bars embedded in the concrete block and fixed at the bottom to the column connector. The top of the vertical reinforcement bars protrudes from the top surface of the concrete block and passes through the beam connection hole. The concrete block, as the main structure of the side column, has good load-bearing capacity. The fixed connection between the column connector and the vertical reinforcement bars forms a stable force transmission system inside the side column. At the same time, the vertical reinforcement bars and the column connector can be directly connected to the external beam, thereby opening up the vertical force transmission channel inside the side column and avoiding the unreasonable lateral force transmission method in the prior art.

[0012] The column connector is cylindrical, with a column connection hole formed on its bottom wall for a beam connecting bar to pass through. The cylindrical shape and the column connection hole provide an "insertion-anchoring" interface for the reinforcement in the external beam structure, and the cylindrical structure also provides operating space for construction personnel. During construction, the beam's transverse reinforcement can be directly inserted into the column connection hole and bolted in place, achieving a reliable connection between the beam and column reinforcement. This structure simplifies the construction process to a single "insertion-locking" step, effectively improving construction efficiency.

[0013] The slab structure includes Slab 1 and Slab 2. Slab 1 contains several horizontal reinforcing bars that connect to connecting reinforcing bars at their joint ends, with the ends of these connecting reinforcing bars protruding from the concrete of Slab 1. Slab 2 contains several horizontal reinforcing bars that connect to sleeves at their joint ends, with the sleeves embedded in the concrete of Slab 2. In the joint state, the connecting reinforcing bars of Slab 1 pass through the sleeves of Slab 2 and are bolted together with nuts. By setting connecting reinforcing bars connected to the horizontal reinforcing bars of Slab 1 and sleeves connected to the horizontal reinforcing bars of Slab 2, and using nut bolting to connect them into a whole, a stable connection is formed between the reinforcing bars in Slab 1 and Slab 2. This nut bolting method replaces the existing cast-in-place connection method between slabs, eliminating the need for wet work, effectively improving construction efficiency and reducing construction difficulty.

[0014] The slab structure also includes a slab sleeve, which is connected to the first horizontal reinforcement bar and / or the second horizontal reinforcement bar of the slab. When the beam structure and slab structure are joined, the second connecting reinforcement bar of the beam passes through the slab sleeve and is bolted together with nuts. This structure is convenient to operate and safe and stable, and can be installed during the factory prefabrication stage. On-site assembly only requires tightening bolts to achieve rapid assembly, avoiding the high-temperature operations and quality fluctuations associated with traditional welding. Attached Figure Description

[0015] Figure 1 This is a partial structural diagram of a beam structure. Figure 2 This is a perspective view (partial) of the beam structure; Figure 3 This is a structural schematic diagram of the column segment; Figure 4 This is a perspective diagram of a column segment; Figure 5 This is a structural schematic diagram of plate 1; Figure 6 This is a structural schematic diagram of plate two; Figure 7 This is a schematic diagram of the splicing of board one and board two; Figure 8 This is a structural diagram of a beam-column-slab connection structure.

[0016] The labels in the diagram represent: 1. Beam structure; 11. Concrete body; 12. Beam first connecting bar; 13. Beam transverse reinforcement; 14. Beam connector; 141. Beam connection hole; 15. Beam second connecting bar; 2. Column structure; 21. Column segment; 211. Core column; 2111. Core column vertical reinforcement; 2112. Connecting sleeve; 212. Side column; 2121. Concrete block; 2122. Column connector; 21221. Column connecting hole; 2123. Side column vertical reinforcement; 3. Slab structure; 31. Slab 1; 311. Horizontal reinforcement of slab 1; 312. Connecting reinforcement of slab 1; 32. Slab 2; 321. Horizontal reinforcement of slab 2; 322. Slab 2 sleeve; 33. Slab sleeve. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Example like Figures 1 to 8 As shown, in this embodiment, the beam structure 1 includes a concrete body 11. A beam-first connecting bar 12 protrudes from the end of the concrete body 11. The bottom end of the beam-first connecting bar 12 is connected to the beam transverse reinforcement 13 within the concrete body 11, and its top end is bolted to the external column structure 2. Specifically, the beam-first connecting bar 12 is configured as a hinged bolt, with its annular fixing ring fitted onto the beam transverse reinforcement 13. A beam connector 14 for connecting to the external column structure 2 is also provided at the bottom corner of the concrete body 11. The beam connector 14 and the beam-first connecting bar 12 are arranged vertically. The beam connector 14 is cylindrical, and its bottom wall forms a beam connection hole 141 for the reinforcement of the external column structure 2 to pass through. A beam-second connecting bar 15 also protrudes from the concrete body 11. The bottom end of the beam-second connecting bar 15 is connected to the beam transverse reinforcement 13 within the concrete body 11, and its top end is bolted to the external slab structure 3. The beam-second connecting bar 15 is configured as a hinged bolt, with its annular fixing ring fitted onto the beam transverse reinforcement 13.

[0019] In this embodiment, the column structure 2 is composed of several column segments 21 connected vertically from top to bottom. Specifically, each column segment 21 includes a core column 211 with a square cross-section. Two side columns 212 protrude from adjacent sides of the core column 211. The height difference between the top surface of the core column 211 and the top surface of the side columns 212 is equal to the height of the beam structure 1, and the bottom surface of the core column 211 is flush with the bottom surface of the side columns 212. The column segment 21 is constructed of reinforced concrete. Four core column vertical bars 2111 are provided inside the core column 211, and two side column vertical bars 2123 are provided inside each side column 212. A connecting sleeve 2112 is also built into the bottom of the core column 211. Optionally, the connecting sleeve 2112 is a semi-grouted sleeve. The bottom end of the core column vertical bar 2111 is threadedly fixed to the connecting sleeve 2112, and the top end of the core column vertical bar 2111 protrudes from the top surface of the core column 2111. The side column 212 includes a concrete block 2121 covering the side column vertical reinforcement 2123, and a column connector 2122 fixed below it. The top end of the column connector 2122 is welded to the bottom end of the side column vertical reinforcement 2123, and the top end of the side column vertical reinforcement 2123 protrudes from the top surface of the concrete block 2121 for connecting to the external beam structure 1. Specifically, the column connector 2122 is cylindrical, with a column connection hole 21221 formed on its bottom wall for the reinforcement in the external beam structure 1 to pass through, and a side hole formed on its side wall that fits against the core column 211 for the grouting nozzle of the semi-grouting sleeve to pass through. The bottom surface of the beam structure 1 presses against the top surface of the lower side column 212, and its top surface is flush with the top surface of the lower core column 211, while the bottom surface of the upper side column 212 presses against the top surface of the beam structure 1.

[0020] In this embodiment, the slab structure 3 includes a first slab 31 and a second slab 32. The first slab 31 contains a plurality of first slab horizontal reinforcement bars 311, which are connected to first slab connecting reinforcement bars 312 at their joint ends. The ends of the first slab connecting reinforcement bars 312 protrude from the concrete of the first slab 31. The second slab 32 contains a plurality of second slab horizontal reinforcement bars 321, which are connected to second slab sleeves 322 at their joint ends. The second slab sleeves 322 are embedded in the concrete of the second slab 32. In the joined state, the first slab connecting reinforcement bars 312 pass through the second slab sleeves 322 and are bolted together with nuts. Specifically, the slab structure 3 also includes a slab sleeve 33, which is connected to the first slab horizontal reinforcement bars 311 and / or the second slab horizontal reinforcement bars 321. In the joined state, the second beam connecting reinforcement bars 15 pass through the slab sleeve 33 and are bolted together with nuts.

[0021] In this embodiment, the beam-column-slab connection structure of the prefabricated building includes the beam structure 1, the column structure 2, and the slab structure 3 described above; the end of the beam structure 1 is inserted into the groove formed by the two column segments 21 connected at the top and bottom, and the beam structure 1 and the slab structure 3 are bolted together.

[0022] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A beam structure (1) of a fabricated building, characterized in that: The concrete body (11) includes a beam-1 connecting bar (12) protruding from the end of the concrete body (11). The bottom end of the beam-1 connecting bar (12) is connected to the beam transverse bar (13) inside the concrete body (11), and its top end is bolted to the external column structure (2). The bottom corner of the concrete body (11) is also provided with a beam connector (14) for connecting to the external column structure (2). The beam connector (14) and the beam-1 connecting bar (12) are arranged vertically. The concrete body (11) also has a beam-2 connecting bar (15) protruding from the end. The bottom end of the beam-2 connecting bar (15) is connected to the beam transverse bar (13) inside the concrete body (11), and its top end is bolted to the external slab structure (3).

2. The prefabricated building beam structure (1) according to claim 1, characterized in that: The beam connecting bar (12) is configured as a hinge bolt, and its annular fixing ring is fitted onto the beam transverse bar (13).

3. The prefabricated building beam structure (1) according to claim 1, characterized in that: The beam connector (14) is cylindrical, and its bottom wall has a beam connection hole (141) for the reinforcing bars of the external column structure (2) to pass through.

4. The prefabricated building beam structure (1) according to claim 1, characterized in that: The connecting bar (15) of the beam is set as a hinge bolt, and its annular fixing ring is fitted on the beam transverse bar (13).

5. Beam-column-slab connection structure characterized by: The beam structure (1) included in any one of claims 1-4, as well as the column structure (2) and the slab structure (3); the column structure (2) is composed of a plurality of column segments (21) connected vertically from top to bottom, the end of the beam structure (1) is inserted into the groove formed by the two column segments (21) connected from top to bottom, and the beam structure (1) and the slab structure (3) are bolted together.

6. The beam-column-slab connection structure according to claim 5, characterized by: The column segment (21) includes a core column (211), and at least one side of the core column (211) protrudes to form a side column (212); the height difference between the top surface of the core column (211) and the top surface of the side column (212) is equal to the height of the beam structure (1), and the bottom surface of the core column (211) is flush with the bottom surface of the side column (212); the bottom surface of the beam structure (1) is pressed on the top surface of the lower side column (212), and its top surface is flush with the top surface of the lower core column (211), while the bottom surface of the upper side column (212) is pressed on the top surface of the beam structure (1).

7. The beam-column-slab connection structure according to claim 6, characterized by: The side column (212) includes a concrete block (2121), a column connector (2122) fixed below it, and a side column vertical bar (2123) built into the concrete block (2121) and fixed at the bottom end to the column connector (2122); the top of the side column vertical bar (2123) protrudes from the top surface of the concrete block (2121) and passes through the beam connection hole (141).

8. The beam-column-slab connection structure according to claim 7, characterized by: The column connector (2122) is cylindrical, and its bottom wall has a column connection hole (21221) through which a beam connecting bar (12) passes.

9. The beam-column-slab connection structure according to claim 5, characterized by: The slab structure (3) includes a first slab (31) and a second slab (32); the first slab (31) has a plurality of first slab horizontal bars (311) inside, which are connected to the first slab connecting bars (312) at the joint end of the first slab (31), and the end of the first slab connecting bars (312) protrudes from the concrete of the first slab (31); the second slab (32) has a plurality of second slab horizontal bars (321) inside, which are connected to the second slab sleeve (322) at the joint end of the second slab (32), and the second slab sleeve (322) is built into the concrete of the second slab (32); when the two are joined, the first slab connecting bars (312) pass through the second slab sleeve (322) and are bolted together with nuts.

10. The beam-column-slab connection structure according to claim 9, characterized by: The plate structure (3) also includes a plate sleeve (33), which is connected to the first horizontal reinforcement (311) and / or the second horizontal reinforcement (321); when the beam structure (1) and the plate structure (3) are joined, the second connecting reinforcement (15) of the beam passes through the plate sleeve (33) and is bolted by a nut.

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