A bolted end-plate connection joint of a fabricated concrete beam-column

Abstract

The present application relates to the technical field of building construction, in particular to a bolt end plate connecting joint of a fabricated concrete beam column, comprising a sleeve plate one and a sleeve plate two, both of which are sleeved on a steel column, both sides of the steel column are provided with a concrete fabricated beam, the bottom surface of the sleeve plate one is fixed with two groups of traction plates, each group is provided with two traction plates, the two traction plates are inserted into two groove bodies at the end of the concrete fabricated beam, the surface of the traction plate is fixed with a connecting plate, and the surface of the connecting plate is provided with a assembling groove, the sleeve plate one and the sleeve plate two are sleeved on the steel column, the pre-limiting of the concrete fabricated beam is realized through the traction plate, the screw rod and the nut, the operation process is simple and easy to understand, the construction personnel do not need to have superb welding skills, only need to install the parts and tighten the bolts according to a certain order, the connection can be completed, the construction time is greatly shortened, and the construction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a bolt end plate connection node for prefabricated concrete beams and columns. Background Technology

[0002] In the field of prefabricated buildings, the connection of concrete beams and columns is a critical link, and its connection quality directly affects the overall stability, safety, and durability of the building structure. Traditional methods for connecting concrete beams and columns mostly involve welding or on-site pouring of concrete.

[0003] However, welding has many drawbacks. On the one hand, the welding process requires a high level of skill from the operators. Improper welding techniques can easily lead to welding defects such as porosity, slag inclusions, and cracks. These defects reduce the strength and toughness of the welded joint, thus affecting the reliability of beam-column connections and posing safety hazards to the building structure. On the other hand, welding operations usually need to be carried out on-site, generating a large amount of smoke, arc light, and noise pollution, which harms the health of construction workers and may also have adverse effects on the surrounding environment. In addition, if the welded components are subjected to collisions or vibrations during transportation and installation, the welded areas may develop cracks or other damage, which are difficult to repair.

[0004] On-site concrete pouring also has significant drawbacks. This method has a long construction cycle, with each stage—from formwork installation and rebar tying to concrete pouring and curing—consuming considerable time, thus extending the overall construction project duration. Furthermore, the quality of on-site poured concrete is affected by various factors, such as raw material quality, mix proportions, construction techniques, and ambient temperature and humidity, making precise quality control difficult and prone to issues like substandard concrete strength, honeycomb texture, and cracks. Additionally, on-site concrete pouring requires a large amount of formwork and support materials, increasing construction costs and material waste.

[0005] With the construction industry's ever-increasing demands for construction efficiency, quality, and environmental protection, traditional concrete beam-column connection methods are no longer sufficient to meet the development needs of modern prefabricated buildings. Therefore, developing a prefabricated concrete beam-column connection technology that is simple to construct, reliable in connection, and environmentally friendly and efficient is of significant practical importance. Summary of the Invention

[0006] The purpose of this invention is to provide a bolted end plate connection node for prefabricated concrete beams and columns to solve the problems mentioned in the background art.

[0007] To achieve the above objective, the present invention provides the following technical solution: a bolted end plate connection node of prefabricated concrete beam and column, comprising a first sleeve plate and a second sleeve plate, both the first sleeve plate and the second sleeve plate are sleeved on a steel column, concrete assembled beams are installed on both sides of the steel column, two groups of traction plates are fixed on the bottom surface of the first sleeve plate, each group of traction plates comprises two traction plates, the two traction plates are inserted into two grooves at the end of the concrete assembled beam, connecting plates are fixed on the surfaces of the traction plates, an assembling groove is provided on the surface of the connecting plate, an inserting block is inserted into the surface of the assembling groove, a stop block is slidably connected inside the assembling groove, the stop block pushes the connecting plate to be inserted on the surface of the concrete assembled beam, the stop blocks on both sides of the concrete assembled beam penetrate through the concrete assembled beam via a first bolt and then connected to the concrete assembled beam, the two groups of traction plates are connected via a second bolt penetrating through the steel column.

[0008] Preferably, a screw rod is fixed on the bottom surface of the traction plate, the screw rod penetrates through the second sleeve plate, a nut is screwed on the bottom end of the screw rod in a sleeved manner, after the screw rod and the nut are screwed and locked, the first sleeve plate and the second sleeve plate clamp the concrete assembled beam.

[0009] Preferably, the traction plate is a flag-shaped plate, second through holes are provided on both the traction plate and the surface of the steel column, the first bolt penetrates through the traction plate and the second through holes on the surface of the steel column and then is screwed and locked.

[0010] Preferably, limiting grooves are provided on both the top surface and the bottom surface of the assembling groove, the limiting grooves are convex grooves, convex sliding strips are integrally formed on the upper and lower sides of the stop block, and the sliding strips are slidably connected in the limiting grooves.

[0011] Preferably, a through opening is provided on the surface of the assembling groove, the inserting block is inserted in the through opening, an inclined surface is provided at one end of the inserting block close to the assembling groove, a notch is provided at the other end of the inserting block, a rubber belt is fixed on the surface of the notch, and two ends of the rubber belt are respectively fixed on two parallel side walls of the through opening.

[0012] Preferably, when the stop block pushes the inserting block, the inserting block stretches the rubber belt to deform, and one end of the inserting block is inserted into an inserting opening provided on the surface of the concrete assembled beam.

[0013] Preferably, first through holes are provided on the surfaces of the stop block, the assembling groove and the concrete assembled beam, the first bolt penetrates through a plurality of the first through holes, after the first bolt is locked, the stop block is fixed in the connecting plate, and the concrete assembled beam is fixed between the two connecting plates.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The bolted end plate connection node for prefabricated concrete beams and columns proposed in this invention uses two sleeve plates, one on top of the steel column, and a traction plate, bolts, and nuts to pre-position the prefabricated concrete beam. The operation process is simple and easy to understand. Construction workers do not need advanced welding skills; they only need to install the components and tighten the bolts in a certain sequence to complete the connection, greatly shortening the construction time and improving construction efficiency. For example, in traditional welding connection methods, completing the welding of a beam-column node may take several hours or even longer, while the connection method of this invention can be completed in a shorter time, effectively shortening the construction period of the building project.

[0015] The connection between the traction plate and the steel column is achieved through bolts and through holes, followed by screw-locking. Additionally, blocks on both sides of the precast concrete beam are connected to the beam via bolts and through holes. Simultaneously, insert blocks are used to achieve positioning within slots on the surface of the precast concrete beam, creating a multi-layered connection and positioning mechanism. This connection method effectively transfers internal forces between the beam and column, improving the load-bearing capacity and deformation resistance of the joint. It ensures that the beam-column connection remains stable and reliable under various loads, preventing loosening, slippage, or breakage, thus guaranteeing the overall safety of the building structure.

[0016] The connection nodes of this invention adopt a standardized and modular component design, with all components prefabricated in the factory, ensuring strict dimensional accuracy and quality. During on-site installation, assembly is only required according to design requirements, avoiding quality issues caused by human factors and environmental conditions during on-site construction. For example, dimensional deviations and welding defects in components can be effectively controlled during factory prefabrication, resulting in more stable and reliable connection node quality and improving the overall quality of the building structure.

[0017] Compared to traditional welding methods, the connection nodes of this invention eliminate the need for welding during construction, avoiding pollution such as welding fumes, arc light, and noise, thus reducing harm to the health of construction workers and impact on the surrounding environment. Simultaneously, this connection method reduces the use of on-site formwork and support materials, minimizing material waste and construction debris, aligning with the principles of green building and sustainable development. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Sectional view of the structure at point AA; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 4This is a schematic diagram of the connection structure between sleeve one and sleeve two of the present invention; Figure 5 This is a schematic diagram of the connection structure between the sleeve plate and the traction plate of the present invention; Figure 6 This is a schematic diagram of the connection structure between the traction plate and the connecting plate; Figure 7 This is a schematic diagram of the stop block structure of the present invention.

[0019] In the diagram: 1. Steel column; 2. Concrete assembly beam; 3. Insert 201; 4. Sleeve 1; 5. Sleeve 2; 6. Traction plate; 7. Screw 501; 8. Nut 502; 9. Connecting plate; 10. Assembly groove 601; 11. Limiting groove 602; 12. Through hole 603; 13. Insert block 604; 14. Notch 6041; 15. Rubber band 605; 16. Stop block 7; 17. Sliding strip 701; 18. Picking groove 702; 19. Through hole 2; 10. Bolt 2. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit 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.

[0021] Please see Figures 1 to 7 This invention provides a technical solution: a bolt end plate connection node for prefabricated concrete beams and columns, including a first sleeve plate 3 and a second sleeve plate 4. Both the first sleeve plate 3 and the second sleeve plate 4 are sleeved on a steel column 1. Concrete prefabricated beams 2 are installed on both sides of the steel column 1. Two sets of traction plates 5 are fixed on the bottom surface of the first sleeve plate 3. Each set of traction plates 5 has two plates. The two traction plates 5 are inserted into two grooves at the ends of the concrete prefabricated beams 2. A screw rod 501 is fixed on the bottom surface of the traction plate 5. The screw rod 501 passes through the second sleeve plate 4, and a nut 502 is screwed onto the bottom end of the screw rod 501. After the screw rod 501 and the nut 502 are screwed and locked, the first sleeve plate 3 and the second sleeve plate 4 clamp the concrete prefabricated beams 2. The traction plate 5 is flag-shaped. Both the traction plate 5 and the surface of the steel column 1 have through holes 2 10. A bolt 1 9 passes through the through holes 2 10 on the surfaces of the traction plate 5 and the steel column 1 and is screwed and locked.

[0022] First, sleeve plate 3 and sleeve plate 4 are pre-installed on the steel column 1. At this time, the four traction plates 5 at the bottom of sleeve plate 3 support the four corners of the steel column 1. After bolt 2 11 is passed through the traction plate 5 and the through hole 2 10 on the surface of the steel column 1, it is locked. At this time, the four traction plates 5 are fixed on the steel column 1. Then, sleeve plate 2 4 is pushed up until the end of the screw 501 passes through sleeve plate 2 4. Then, nut 502 is installed on the end of screw 501 and tightened two turns. At this time, sleeve plate 2 4 is suspended at the bottom of sleeve plate 3. Then, concrete assembly beam 2 is hoisted and placed against one side of the steel column 1. The area between the two traction plates 5 is moved to insert concrete assembly beam 2. Then, nut 502 is tightened on screw 501. At this time, concrete assembly beam 2 is clamped between sleeve plate 3 and sleeve plate 2 4 and is pre-limited.

[0023] To further strengthen the connection between the concrete precast beam 2 and the steel column 1, the following was proposed: A connecting plate 6 is fixed to the surface of the traction plate 5. An assembly groove 601 is formed on the surface of the connecting plate 6. An insert block 604 is inserted into the surface of the assembly groove 601. A stop block 7 is slidably connected inside the assembly groove 601. The stop block 7 pushes the connecting plate 6 into the surface of the concrete assembly beam 2. The stop blocks 7 on both sides of the concrete assembly beam 2 are connected to the concrete assembly beam 2 by a bolt 9. The two sets of traction plates 5 are connected by a bolt 11 that passes through the steel column 1. Limiting grooves 602 are formed on both the top and bottom surfaces of the assembly groove 601. The limiting grooves 602 are convex (U) shaped. Concave (U) shaped sliding strips 701 are integrally formed on both the upper and lower sides of the stop block 7. The sliding strips 701 are slidably connected in the limiting grooves 602. An opening 6 is formed on the surface of the assembly groove 601. 03. The insert block 604 is inserted into the through-hole 603. One end of the insert block 604 near the assembly groove 601 has a bevel, and the other end of the insert block 604 has a notch 6041. A rubber band 605 is fixed to the surface of the notch 6041, and the two ends of the rubber band 605 are respectively fixed to two parallel side walls of the through-hole 603. When the stop block 7 pushes the insert block 604, the insert block 604 stretches and deforms the rubber band 605, and one end of the insert block 604 is inserted into the through-hole 201 on the surface of the concrete assembly beam 2. Through holes 8 are opened on the surfaces of the stop block 7, the assembly groove 601, and the concrete assembly beam 2. Multiple through holes 8 are penetrated by bolts 9. After the bolts 9 are tightened, the stop block 7 is fixed in the connecting plate 6, and the concrete assembly beam 2 is fixed between the two connecting plates 6. A retrieval groove 702 is opened on the surface of the baffle 7, and fingers can be inserted into the retrieval groove 702 to easily pull out the baffle 7.

[0024] After the concrete assembly beam 2 is clamped between sleeve plate 3 and sleeve plate 4, the stop block 7 is pushed into the corresponding assembly slot 601, and the slide bar 701 slides into the limiting slot 602 to prevent the stop block 7 from tilting to the side. In the initial state, the rubber band 605 pulls one end of the insert block 604 into the assembly slot 601 a certain distance. As the stop block 7 is pushed into the assembly slot 601, the stop block 7 pushes the insert block 604 along the inclined surface, and the insert block 604 is compressed into the through hole 603. The tensioned rubber band 605 is deformed, and the other end of the insert block 604 is inserted into the insert 201, so that the concrete assembly beam 2 is limited between the two traction plates 5, preventing the concrete assembly beam 2 from being pulled and moved in the horizontal direction. Then, the bolt 9 is passed through the stop block 7, the assembly groove 601 and the through hole 8 on the surface of the concrete assembly beam 2 and locked. At this time, the concrete assembly beam 2 is firmly fixed between the two traction plates 5, completing the quick and weld-free fixing of the steel column 1 and the concrete assembly beam 2.

[0025] Method for using bolted end plate connections in prefabricated concrete beams and columns: Preliminary preparation: First, sleeve plate 3 and sleeve plate 4 are installed on the steel column 1. At this time, the four traction plates 5 at the bottom of sleeve plate 3 are supported at the four corners of the steel column 1.

[0026] Fixing the traction plates: After passing the bolts 211 through the through holes 210 on the surfaces of the traction plates 5 and the steel column 1, tighten them. At this time, the four traction plates 5 are fixed on the steel column 1.

[0027] Suspension plate two: Push up the second sleeve plate 4 until the end of the screw 501 passes through the second sleeve plate 4, then put the nut 502 on the end of the screw 501 and turn it two turns. At this time, the second sleeve plate 4 is suspended at the bottom of the first sleeve plate 3.

[0028] Hoisting the concrete assembly beam: After hoisting the concrete assembly beam 2 and placing it against one side of the steel column 1, move the concrete assembly beam 2 into the area between the two traction plates 5.

[0029] Pre-limited concrete assembly beam: Tighten nut 502 on screw 501. At this time, concrete assembly beam 2 is pre-limited between sleeve 3 and sleeve 4.

[0030] Further strengthen the connection Preparation component: a connecting plate 6 is fixed on the surface of a traction plate 5, an assembling groove 601 is formed on the surface of the connecting plate 6, limiting grooves 602 are formed on both the top surface and the bottom surface of the assembling groove 601, and the limiting grooves 602 are convex-shaped grooves; a through opening 603 is formed on the surface of the assembling groove 601, an insertion block 604 is inserted into the through opening 603, one end of the insertion block 604 close to the assembling groove 601 is provided with a slope, the other end of the insertion block 604 is provided with a notch 6041, a rubber belt 605 is fixed on the surface of the notch 6041, and two ends of the rubber belt 605 are respectively fixed on two parallel side walls of the through opening 603; convex-shaped sliding strips 701 are integrally formed on the upper and lower sides of a stop block 7.

[0031] Pushing in the stop block: after the concrete assembling beam 2 is clamped between a first sleeve plate 3 and a second sleeve plate 4, push the stop block 7 into the corresponding assembling groove 601, and the sliding strips 701 slide into the limiting grooves 602 to prevent the stop block 7 from toppling sideways.

[0032] The stop block pushing the insertion block: in the initial state of the rubber belt 605, one end of the insertion block 604 is pulled to extend a certain distance into the assembling groove 601. When the stop block 7 advances in the assembling groove 601, the stop block 7 pushes the insertion block 604 along the slope, the insertion block 604 is compressed into the through opening 603, the insertion block 604 stretches the rubber belt 605 to deform, and the other end of the insertion block 604 is inserted into an insertion opening 201 formed on the surface of the concrete assembling beam 2, so that the concrete assembling beam 2 is limited between the two traction plates 5, and the concrete assembling beam 2 is prevented from being pulled and moved in the horizontal direction.

[0033] Locking by bolts: first through holes 8 are formed on the surfaces of the stop block 7, the assembling groove 601 and the concrete assembling beam 2, a first bolt 9 is passed through the first through holes 8 on the surfaces of the stop block 7, the assembling groove 601 and the concrete assembling beam 2 and then locked, and at this time the concrete assembling beam 2 is firmly fixed between the two traction plates 5.

[0034] Through the above steps, rapid welding-free fixing of the steel column 1 and the concrete assembling beam 2 is completed.

[0035] Although the embodiments of the present invention have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bolt end plate connection node for a prefabricated concrete beam-column assembly, comprising a first sleeve plate (3) and a second sleeve plate (4), both the first sleeve plate (3) and the second sleeve plate (4) being fitted onto a steel column (1), wherein prefabricated concrete beams (2) are installed on both sides of the steel column (1), characterized in that: Two groups of traction plates (5) are fixed to the bottom surface of the first sleeve plate (3), each group of traction plates (5) is provided with two traction plates, the two traction plates (5) are inserted into two grooves at the end of the concrete assembled beam (2), a connecting plate (6) is fixed to the surface of the traction plate (5), an assembling groove (601) is opened on the surface of the connecting plate (6), an insertion block (604) is inserted into the surface of the assembling groove (601), a stop block (7) is slidably connected inside the assembling groove (601), the stop block (7) pushes the insertion block (604) along an inclined surface, the insertion block (604) is compressed into the through opening (603) under pressure, the insertion block (604) stretches an elastic band (605) to deform, and the other end of the insertion block (604) is inserted into an insertion opening (201) opened on the surface of the concrete assembled beam (2), so that the concrete assembled beam (2) is limited between the two traction plates (5), the stop blocks (7) on both sides of the concrete assembled beam (2) penetrate through a first bolt (9) and then are connected to the concrete assembled beam (2), and the two groups of traction plates (5) are connected through a second bolt (11) penetrating the steel column (1); A screw rod (501) is fixed to the bottom surface of the traction plate (5), the screw rod (501) penetrates a second sleeve plate (4), a nut (502) is sleeved and screwed on the bottom end of the screw rod (501), after the screw rod (501) and the nut (502) are screwed and locked, the first sleeve plate (3) and the second sleeve plate (4) clamp the concrete assembled beam (2); Limiting grooves (602) are respectively opened on the top surface of the assembling groove (601) and the bottom surface of the assembling groove (601), the limiting grooves (602) are convex-shaped grooves, convex-shaped sliding strips (701) are integrally formed on both the upper side and the lower side of the stop block (7), and the sliding strips (701) are slidably connected in the limiting grooves (602); When the stop block (7) pushes the insertion block (604), the insertion block (604) stretches the elastic band (605) to deform, and one end of the insertion block (604) is inserted into the insertion opening (201) opened on the surface of the concrete assembled beam (2).

2. The bolt end plate connection node for prefabricated concrete beams and columns according to claim 1, characterized in that: The traction plate (5) is a flag-shaped plate, second through holes (10) are respectively opened on the surfaces of the traction plate (5) and the steel column (1), and the first bolt (9) penetrates the second through holes (10) on the surfaces of the traction plate (5) and the steel column (1) and then is screwed and locked.

3. The bolt end plate connection node for prefabricated concrete beams and columns according to claim 1, characterized in that: The through opening (603) is opened on the surface of the assembling groove (601), the insertion block (604) is inserted into the through opening (603), one end of the insertion block (604) close to the assembling groove (601) is provided with an inclined surface, a notched groove (6041) is opened on the other end of the insertion block (604), the elastic band (605) is fixed on the surface of the notched groove (6041), and two ends of the elastic band (605) are respectively fixed on two parallel distributed side walls of the through opening (603).

4. The bolt end plate connection node for prefabricated concrete beams and columns according to claim 1, characterized in that: First through holes (8) are respectively opened on the surfaces of the stop block (7), the assembling groove (601) and the concrete assembled beam (2), the first bolts (9) penetrate through the plurality of first through holes (8), after the first bolt (9) is locked, the stop block (7) is fixed in the connecting plate (6), and the concrete assembled beam (2) is fixed between the two connecting plates (6).

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