A prefabricated main beam and column combined connecting structure

Abstract

This invention discloses a precast main beam and column combined connection structure, including: precast columns, precast beams, and steel brackets corresponding to the precast beams; the precast beams are fixed in the steel brackets by anchor plates and anchor bars, and the anchor plates fix the precast columns and precast beams; upper positioning blocks and lower positioning blocks are disposed in the steel brackets, respectively abutting and positioning the upper and lower end faces of the precast beams; the upper positioning block is fixed to the precast columns and steel brackets by through-through column reinforcement bars; reinforcing angle steel is provided at the bottom of the steel brackets, and connecting members are sleeved between adjacent steel brackets and reinforcing angle steel. This invention can improve the integrity between steel brackets, and based on the abutting structure of the upper and lower arc-shaped end faces of the arc-shaped beams, combined with anchor bars, the arc-shaped beams have the function of elastic reset and repositioning after deformation, thereby improving the construction efficiency, structural strength, seismic resistance, and elastic reset performance of the beam-column assembly structure.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building structure technology, specifically a prefabricated main beam and column combined connection structure. Background Technology

[0002] In building construction, beam-column connections are commonly secured using steel brackets, bolts for surface positioning, and internal reinforcement. However, currently, steel brackets are often used in relatively isolated configurations. When one steel bracket structure becomes unstable, it can experience localized buckling, slippage, and further instability, leading to compression and deformation of other building components. This results in structural deformation of both the interior and exterior surfaces, requiring building repairs and shortening the building's lifespan. Furthermore, some integrated steel bracket structures, connecting to beams on multiple sides, exhibit poor seismic performance. When beams vibrate, uneven stress on different sides of the steel bracket can also cause buckling and cracking. Additionally, for the assembly of curved beams, commonly used steel bracket structures cannot provide the deformable and repositionable functions required after vibration deformation. Summary of the Invention

[0003] The purpose of this invention is to address the problem that in actual construction and use, steel brackets at beam-column connection nodes are often used in relatively isolated manner. When a steel bracket structure becomes unstable, it will experience local buckling, slippage, and instability, leading to compression and deformation of other building components, deformation of the building's interior and exterior surfaces, requiring building repairs, and resulting in a short service life. Furthermore, some integrated steel bracket structures, which connect to beams on multiple sides, have poor seismic performance. When the beams vibrate, causing uneven stress on different sides of the steel bracket, it can also lead to buckling and cracking of the steel bracket structure. Additionally, for the assembly of curved beams, after vibration deformation, commonly used steel bracket structures cannot achieve the deformable and repositionable functions of curved beams. Therefore, this invention provides a prefabricated main beam and column combined connection structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a precast main beam and column combined connection structure, comprising: a precast column, an arc-shaped precast beam connected to the side of the precast column, and steel brackets corresponding to the precast beams.

[0005] The precast beams are inserted into the grooves of the steel brackets and fixed in the steel brackets by anchor plates and anchor bars. The anchor plates fix the precast columns and precast beams.

[0006] The upper positioning block and the lower positioning block are set inside the steel bracket to abut and position the upper and lower end faces of the precast beam, respectively. The upper positioning block is fixed to the precast column and the steel bracket by the through-through column reinforcement.

[0007] The bottom of the steel bracket is equipped with reinforcing angle steel, and connecting parts are sleeved between adjacent steel brackets and reinforcing angle steel to reinforce the steel bracket.

[0008] As a further description of the above technical solution:

[0009] The sides and bottom of the precast beam ends are flat, and the steel brackets are U-shaped steel brackets.

[0010] As a further description of the above technical solution:

[0011] The inner wall of the back plate of the steel bracket near the precast column is equipped with a reinforcing plate. An anchor plate is horizontally inserted through the plate hole of the reinforcing plate. The inner side of the anchor plate extends inward and is inserted into the plate groove of the precast column, while its outer side is inserted into the plate groove at the end of the precast beam.

[0012] As a further description of the above technical solution:

[0013] The anchor bars penetrate vertically through the anchor plate and are sequentially inserted into the anchor holes at the ends of the precast beam and into the first positioning groove on the bottom surface of the inner wall of the steel bracket.

[0014] As a further description of the above technical solution:

[0015] The bottom surface of the upper positioning block is provided with a first arc-shaped surface that abuts and matches the upper end surface of the precast beam, and the top surface of the lower positioning block is provided with a second arc-shaped surface that abuts and matches the lower end surface of the precast beam. Several first column reinforcement holes corresponding to column reinforcements are provided in the upper positioning block. The column reinforcements pass through the second column reinforcement holes on the back plate of the steel bracket and the column reinforcement holes of the precast column, and are connected and fixed to the steel bracket and precast beam on the other side. A cover plate is fixed on the top of the upper positioning block, and the top of the steel bracket is fitted on the cover plate and fixed with bolts.

[0016] As a further description of the above technical solution:

[0017] The reinforcing angle steel includes a base plate that abuts against the bottom surface of the steel bracket and a side plate that abuts against the side of the precast column and is fixed with bolts. The top surface of the base plate is provided with several positioning blocks, which are inserted into the second positioning groove on the bottom surface of the steel bracket. The bottom surface of the side plate is provided with expansion bolts, which are screwed from bottom to top through the base plate and the bottom surface of the steel bracket and inserted into the screw hole of the lower positioning block.

[0018] As a further description of the above technical solution:

[0019] The connector includes a right-angle positioning plate that abuts against the side of the steel bracket and is fixed with bolts, and side edge plates that extend from the upper and lower ends of the right-angle positioning plate toward the steel bracket. The upper side edge plate abuts against the top surface of the steel bracket, while the lower side edge plate abuts against the bottom surface of the reinforcing angle steel and is fixed with bolts.

[0020] As a further description of the above technical solution:

[0021] The side plates on opposite connectors on the same steel bracket are connected by elastic reinforcing ribs.

[0022] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0023] This invention is based on the positioning of steel brackets at the connection nodes of precast concrete columns and beams. For the assembly of curved precast beams, high-strength anchor plates and anchor bars are vertically embedded with the precast beams and used for multi-face positioning with the steel brackets, reinforcing plates, and precast columns, providing initial positioning for the precast columns, beams, and steel brackets. The lower positioning block abuts and positions the ends of the curved precast beams inwards, while the upper positioning block abuts and positions the ends outwards. Together, they abut and fix the precast beam within the steel bracket, further reinforced by a cover plate and reinforcing angle steel. The upper and lower positioning blocks, along with the anchor bars, allow the curved beam to elastically reset and reposition itself after deformation. High-strength column reinforcement connects and reinforces the corresponding structures on the opposite surfaces of the precast column, making the steel bracket fixation more stable. Adjacent steel brackets are laterally abutted and fitted together via connectors, and pre-tightened connections are achieved using elastic reinforcing bars, realizing the associated positioning of adjacent steel brackets. Compared to the common column-beam connection nodes, the isolated use of each steel bracket improves the integrity between the steel brackets. Based on the upper and lower curved end faces of the curved beam, the opposing structures abut against each other, preventing the curved beam from shifting. This improves the construction efficiency, structural strength, seismic resistance, and elastic recovery performance of the beam-column assembly structure, and avoids the problems of local buckling and slippage of the steel brackets. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural schematic diagram of a prefabricated main beam and column combined connection structure.

[0026] Figure 2 This is a front sectional view of a prefabricated main beam and column combined connection structure.

[0027] Figure 3 This is a partial cross-sectional view of a precast beam in a precast main beam and column combined connection structure.

[0028] Figure 4 This is an exploded view of the steel bracket, upper positioning block, and lower positioning block in a prefabricated main beam and column combined connection structure.

[0029] Figure 5This is a schematic diagram of the connecting components in a prefabricated main beam and column combined connection structure.

[0030] Legend:

[0031] 1. Precast column; 2. Precast beam; 21. Anchor plate; 22. Slab groove; 23. Anchor bar; 24. Anchor hole; 3. Steel bracket; 31. Groove; 32. Reinforcing plate; 33. Slab hole; 34. First positioning groove; 35. Second column bar hole; 36. Second positioning groove; 4. Upper positioning block; 41. First arc-shaped surface; 42. Column bar; 43. First column bar hole; 44. Cover plate; 5. Lower positioning block; 51. Second arc-shaped surface; 52. Expansion bolt; 53. Screw hole; 6. Reinforcing angle steel; 61. Base plate; 62. Side plate; 63. Positioning block; 7. Connector; 71. Right-angle positioning plate; 72. Side edge plate; 73. Elastic reinforcing bar. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] Please see Figure 1-5 The present invention provides a technical solution: a precast main beam and column combined connection structure, including: a precast column 1, an arc-shaped precast beam 2 connected to the side of the precast column 1, and steel brackets 3 corresponding to the precast beam 2.

[0035] In this embodiment, the precast column 1 and the precast beam 2 are precast concrete column and curved beam structures;

[0036] The precast beam 2 is inserted into the groove 31 of the steel bracket 3 and fixed in the steel bracket 3 by the anchor plate 21 and the anchor bar 23. The anchor plate 21 fixes the precast column 1 and the precast beam 2.

[0037] The upper positioning block 4 and the lower positioning block 5 are set inside the steel bracket 3 to abut and position the upper and lower end faces of the precast beam 2, respectively. The upper positioning block 4 is fixed to the precast column 1 and the steel bracket 3 through the through-through column reinforcement 42.

[0038] A reinforcing angle steel 6 is provided at the bottom of the steel bracket 3, and a connector 7 is sleeved between adjacent steel brackets 3 and reinforcing angle steel 6. The connector 7 reinforces the steel bracket 3 and structurally connects adjacent steel brackets.

[0039] The sides and bottom of the precast beam 2 are flat, which facilitates a tight fit with the steel bracket 3, making the subsequent assembly of anchor plates and anchor bars more convenient. The steel bracket 3 is a U-shaped steel bracket.

[0040] A reinforcing plate 32 is provided on the inner wall of the back plate of the steel bracket 3 near the precast column 1. An anchor plate 21 is horizontally inserted through the plate hole 33 of the reinforcing plate 32. The inner side of the anchor plate 21 extends inward and is inserted into the plate groove of the precast column 1, while its outer side is inserted into the plate groove 22 at the end of the precast beam 2.

[0041] Anchor bars 23 penetrate vertically through anchor plates 21 and are sequentially inserted into anchor holes 24 at the ends of precast beams 2 and into the first positioning groove 34 on the bottom inner wall of steel brackets 3.

[0042] The bottom surface of the upper positioning block 4 is provided with a first arc-shaped surface 41 that abuts and matches the upper end surface of the precast beam 2, and the top surface of the lower positioning block 5 is provided with a second arc-shaped surface 51 that abuts and matches the lower end surface of the precast beam 2. Several first column reinforcement holes 43 corresponding to column reinforcement 42 are provided in the upper positioning block 4. The column reinforcement 42 passes through the second column reinforcement hole 35 on the back plate of the steel bracket 3 and the column reinforcement hole of the precast column 1, and is connected and fixed to the steel bracket 3 and the precast beam 2 on the other side. The top of the upper positioning block 4 is fixed with a cover plate 44, and the top of the steel bracket 3 is fitted on the cover plate 44 and fixed with bolts.

[0043] The reinforcing angle steel 6 includes a base plate 61 that abuts against the bottom surface of the steel bracket 3 and a side plate 62 that abuts against the side of the precast column 1 and is fixed with bolts. The top surface of the base plate 61 is provided with a number of positioning blocks 63, which are inserted into the second positioning groove 36 on the bottom surface of the steel bracket 3. The bottom surface of the side plate 62 is provided with expansion bolts 52, which are screwed from bottom to top through the base plate 61 and the bottom surface of the steel bracket 3 and inserted into the screw hole 53 of the lower positioning block 5.

[0044] The connector 7 includes a right-angle positioning plate 71 that abuts against the side of the steel bracket 3 and is fixed with bolts, and side edge plates 72 that extend from the upper and lower ends of the right-angle positioning plate 71 toward the steel bracket 3. The upper side edge plate 72 abuts against the top surface of the steel bracket 3, while the lower side edge plate 72 abuts against the bottom surface of the reinforcing angle steel 6 and is fixed with bolts.

[0045] The side plates 72 on the opposite connectors 7 on the same steel bracket 3 are connected by elastic reinforcing ribs 73 to reinforce the connectors 7.

[0046] The manufacturing process of a precast main beam and column combined connection structure in this embodiment includes: manufacturing precast columns 1 and precast beams 2, and reserving anchor holes, plate grooves, column reinforcement holes and threaded holes on the precast columns 1, and reserving plate grooves 22 and anchor holes 24 on the precast beams 2; during on-site construction, the site is first laid out, the precast columns 1 and precast beams 2 are positioned, and the ends of the precast columns 1 are cast or fixed to the ground with positioning kits; steel brackets 3 are arranged on the side of the precast columns 1, and reinforcing plates 32 are placed on the inner sidewall of the steel brackets 3; anchor plates 21 are firmly inserted into the vertically set plate grooves 22 at the ends of the precast beams 2, and the precast beams 2 are connected to the steel brackets 3, so that the anchor plates 21 are inserted into the plate holes 33 and the reserved plate grooves of the precast columns 1 in sequence, and the anchor bars 23 are vertically downward. Anchor holes 24 and the first positioning groove 34 are inserted sequentially to perform preliminary positioning of the precast column 1, precast beam 2, and steel bracket 3. A lower positioning block 5 is inserted into the lower end face of the precast beam inside the steel bracket 3, and the screw holes 53 of the lower positioning block 5 are aligned with the screw holes on the bottom surface of the steel bracket 3. The positioning block 63 is engaged in the second positioning groove 36 of the steel bracket 3 to position the steel bracket 3 and the reinforcing angle steel 6. The bottom plate 61 of the reinforcing angle steel 6 abuts against the bottom of the steel bracket 3 and is fixed in the screw holes 53 of the lower positioning block 5 by expansion bolts 52 passing through the reinforcing angle steel 6 and the steel bracket 3. The side plate 62 of the reinforcing angle steel 6 abuts against the side of the precast column 1 and is fixed by high-strength bolts to position the lower positioning block 5, ensuring its firm support for the curved precast beam. 2. The ends are positioned inwards; the upper positioning block 4 is placed on the upper surface of the precast beam 2, and the top of the U-shaped steel bracket 3 is sealed by the cover plate 44. The cover plate 44 and the side wall of the steel bracket 3 are laterally screwed together with high-strength bolts to make it firmly positioned outwards at the ends of the arc-shaped precast beam 2. The lower positioning block 5 cooperates with the upper positioning block 4 to abut against the precast beam 2 and is fixed in the steel bracket 3. After the steel brackets on the other sides of the precast column 1 are installed in the above steps, the high-strength column reinforcement 42 is inserted in sequence into the first column reinforcement hole 43 of the upper positioning block 4 on one side, the second column reinforcement hole 35 of the steel bracket 3, and the column reinforcement hole of the precast column 1, and penetrates the same structure on the opposite side to connect and reinforce the precast column 1 and the corresponding structure on the opposite side. This makes the steel bracket 3 more stable, thereby ensuring the stable construction and assembly of the precast beam 2 and the precast column 1. In addition, for the case where steel brackets 3 are arranged on four or more sides of the precast column 1, the column reinforcement holes and slots on the precast column 1 and the reinforcement structures on different opposite surfaces should be staggered at different heights, and the structural strength at the column reinforcement hole arrangement of the precast column 1 should meet the construction and actual use requirements. Finally, the right-angle positioning plates of the connector 7 are used to abut on the adjacent steel brackets 3, and the upper and lower side plates 72 are used to fit the reinforcing angle steel 6 and the cover plate 44. After being fixed by high-strength expansion bolts, the horizontally opposite side plates 72 are pre-tightened and connected by elastic reinforcing bars 73 to realize the associated positioning of adjacent steel brackets, that is, to complete the beam-column joint construction and installation.

[0047] In summary, due to the adoption of the above technical solutions, the prefabricated main beam and column combined connection structure of this embodiment has the following advantages compared with the prior art:

[0048] This invention is based on the positioning of steel brackets at the connection nodes of precast concrete columns and beams. For the assembly of curved precast beams, high-strength anchor plates and anchor bars are vertically embedded with the precast beams and used for multi-face positioning with the steel brackets, reinforcing plates, and precast columns, providing initial positioning for the precast columns, beams, and steel brackets. The lower positioning block abuts and positions the ends of the curved precast beams inwards, while the upper positioning block abuts and positions the ends outwards. Together, they abut and fix the precast beam within the steel bracket, further reinforced by a cover plate and reinforcing angle steel. The upper and lower positioning blocks, along with the anchor bars, allow the curved beam to elastically reset and reposition itself after deformation. High-strength column reinforcement connects and reinforces the corresponding structures on the opposite surfaces of the precast column, making the steel bracket fixation more stable. Adjacent steel brackets are laterally abutted and fitted together via connectors, and pre-tightened connections are achieved using elastic reinforcing bars, realizing the associated positioning of adjacent steel brackets. Compared to the common column-beam connection nodes, the isolated use of each steel bracket improves the integrity between the steel brackets. Based on the upper and lower curved end faces of the curved beam, the opposing structures abut against each other, preventing the curved beam from shifting. This improves the construction efficiency, structural strength, seismic resistance, and elastic recovery performance of the beam-column assembly structure, and avoids the problems of local buckling and slippage of the steel brackets.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A prefabricated main beam and column combined connection structure, characterized in that, include: Precast columns, arc-shaped precast beams connected to the sides of the precast columns, and steel brackets corresponding to the precast beams; The precast beam is inserted into the groove of the steel bracket and fixed in the steel bracket by anchor plates and anchor bars. The anchor plates fix the precast column and the precast beam. The upper positioning block and the lower positioning block are set inside the steel bracket to abut and position the upper and lower end faces of the precast beam, respectively. The upper positioning block is fixed to the precast column and the steel bracket by a through-through column reinforcement. The bottom of the steel bracket is provided with a reinforcing angle steel, and a connector is sleeved between adjacent steel brackets and reinforcing angle steel, the connector reinforcing the steel bracket; A reinforcing plate is provided on the inner wall of the back plate of the steel bracket near the precast column. The anchor plate horizontally penetrates the plate hole of the reinforcing plate. The inner side of the anchor plate extends inward and is inserted into the plate groove of the precast column, while its outer side is inserted into the plate groove at the end of the precast beam. The anchor bar penetrates vertically through the anchor plate and is sequentially inserted into the anchor hole at the end of the precast beam and into the first positioning groove on the bottom surface of the inner wall of the steel bracket. The bottom surface of the upper positioning block is provided with a first arc-shaped surface that abuts and matches the upper end surface of the precast beam, and the top surface of the lower positioning block is provided with a second arc-shaped surface that abuts and matches the lower end surface of the precast beam. The upper positioning block is provided with a plurality of first column reinforcement holes corresponding to the column reinforcement. The column reinforcement passes through the second column reinforcement hole on the back plate of the steel bracket and the column reinforcement hole of the precast column, and is connected and fixed to the steel bracket and the precast beam on the other side. The top of the upper positioning block is fixed with a cover plate, and the top of the steel bracket is fitted on the cover plate and fixed with bolts.

2. The prefabricated main beam and column combined connection structure according to claim 1, characterized in that, The side and bottom surfaces of the precast beam ends are flat, and the steel bracket is a U-shaped steel bracket.

3. The prefabricated main beam and column combined connection structure according to claim 1, characterized in that, The reinforcing angle steel includes a base plate abutting against the bottom surface of the steel bracket and a side plate abutting against the side surface of the precast column and fixed with bolts. The top surface of the base plate is provided with a plurality of positioning blocks, which are inserted into the second positioning groove on the bottom surface of the steel bracket. The bottom surface of the side plate is provided with expansion bolts, which are screwed from bottom to top through the base plate and the bottom surface of the steel bracket and inserted into the screw hole of the lower positioning block.

4. The precast main beam and column combined connection structure according to claim 1, characterized in that, The connector includes a right-angle positioning plate that abuts against the side of the steel bracket and is fixed with bolts, and side plates extending from the upper and lower ends of the right-angle positioning plate toward the steel bracket. The upper side plate abuts against the top surface of the steel bracket, and the lower side plate abuts against the bottom surface of the reinforcing angle steel and is fixed with bolts.

5. The precast main beam and column combined connection structure according to claim 4, characterized in that, The side plates on the opposite connectors on the same steel bracket are connected by elastic reinforcing ribs.

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