A new type of prestressed GFRP bar reinforced UHPC beam-column joint
By reinforcing UHPC beam-column joints with prestressed GFRP reinforcement and simplifying structural design with bolted connections, the problems of insufficient strength and durability of traditional materials and complex construction are solved, achieving a simple structure and efficient construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG PREFABRICATED COMPONENTS CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-06-09
AI Technical Summary
In the existing technology, traditional reinforced concrete beams are insufficient in terms of strength, durability and crack resistance, while steel structure beams have defects in terms of corrosion resistance and maintenance costs. The existing prefabricated composite marine concrete beam-column connection nodes have complex construction procedures and low efficiency.
The UHPC beam-column joint is reinforced with prestressed GFRP reinforcement. By setting beam connection plates, beam supports and limiting pressure plates at the connection ends of the precast concrete columns and beams, the precast concrete columns and beams are directly connected by bolts, eliminating the need for independent connectors and ring connection plates, thus simplifying the structural design.
It achieves a simple structure and convenient construction, improves construction efficiency, fully utilizes the high strength of GFRP bars and the high durability of UHPC, solves the shortcomings of traditional materials, and reduces construction complexity and material usage.
Smart Images
Figure CN224338415U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of prefabricated building node connection technology, and in particular to a novel prestressed GFRP reinforced UHPC beam-column node. Background Technology
[0002] With the increasing demands on structural material performance in modern architecture and bridge engineering, traditional reinforced concrete beams and steel beams have gradually revealed some obvious defects. Traditional reinforced concrete beams are insufficient in terms of strength, durability, and crack resistance, especially prone to cracking and durability issues in harsh environments. Although steel beams have high strength and high rigidity, they have significant defects in terms of corrosion resistance and maintenance costs. In particular, steel is prone to rusting in marine or corrosive environments, leading to a decline in structural performance.
[0003] In recent years, glass fiber reinforced polymer (GFRP) composites have been increasingly used for structural reinforcement due to their high strength, lightweight, and corrosion resistance. However, because of their low modulus of elasticity and the inability of traditional reinforcement methods to fully utilize their tensile strength, prestressing can leverage their high strength to a certain extent. Ultra-high performance concrete (UHPC), as a novel material, has attracted widespread attention due to its ultra-high strength, low water-cement ratio, and excellent durability. UHPC can enable concrete materials to achieve a high strength of 120 MPa, significantly reducing the cross-section of traditional concrete components, decreasing material usage, and lightening the component's self-weight.
[0004] Among them, the Chinese utility model patent with patent number ZL 202321947673.9 and patent name: A prefabricated assembled composite marine concrete beam-column connection node adapted to the marine environment, specifically discloses the following technical solution: A prefabricated assembled composite marine concrete beam-column connection node adapted to the marine environment, which includes a vertical concrete column, a horizontal concrete beam, a connector and an annular connecting plate. Multiple sets of internal reinforcement are evenly pre-placed on the end faces of the concrete column and the concrete beam, and a rectangular connecting plate is pre-placed in the center. Multiple sets of anchor bolt holes are opened on the exposed end of the connecting plate. The internal reinforcement and connecting plate are integrally cast from FRP; the connectors include rectangular tubes and clamps; the through holes of the rectangular tubes are vertical, and internal reinforcements are pre-installed on all six sides perpendicular to their respective faces; the clamps consist of three pairs, which orthogonally penetrate the three sets of opposite faces of the rectangular tubes, and a gap of the thickness of the connecting plate is left between each pair of clamps; multiple sets of anchor bolt holes are opened at both ends of the clamps; the internal reinforcement, rectangular tubes and clamps are integrally cast from FRP; there are 6 annular connecting plates, which are respectively fitted onto the outside of the clamps on each side of the rectangular tube, and multiple sets of anchor bolt holes are opened on one set of opposite faces of the annular connecting plates.
[0005] Among them, the construction process of the prefabricated assembled composite marine concrete beam-column connection nodes adapted to the marine environment includes the following steps:
[0006] Step 1: Cast concrete columns and beams with built-in reinforcement and connecting plates using FRP monolithic casting, and use FRP monolithic casting connectors;
[0007] Step 2: After embedding the connecting plate of the concrete column and the concrete beam into the corresponding clamping plate, drill anchor bolt holes on the connecting plate and the clamping plate accordingly.
[0008] Step 3: Tie the internal connecting bars of the connector to the built-in bars of the concrete column and concrete beam, and pour concrete inside the connector to connect them into a whole.
[0009] Step 4: Hoist the entire assembly to the construction location, align the anchor bolt holes, and then anchor the assembly using anchor bolts.
[0010] Step 5: Fit the six ring-shaped connecting plates onto each pair of clamps, drill anchor bolt holes, and then anchor the connection using anchor bolts.
[0011] Step 6: Finally, use marine concrete to pour the concrete column and concrete beam joints to connect them into a whole.
[0012] It should be noted that the aforementioned prefabricated composite marine concrete beam-column connection nodes adapted to marine environments have the following defects, specifically:
[0013] Defect 1: The concrete columns and connectors are independent structural components, and they need to be cast in one piece using FRP during construction, which increases the casting process. In addition, during the process of connecting the concrete columns and beams to the connectors, the internal connecting bars of the connectors are tied to the built-in bars of the concrete columns and beams, which means there is a connector tying process during construction, resulting in multiple construction steps.
[0014] Defect 2: After the concrete columns and concrete beams are connected and assembled by connectors, the concrete column and concrete beam joints are then poured with marine concrete to connect them into a whole. This post-pour construction method for beam-column joints will reduce construction efficiency.
[0015] Defect 3: The prefabricated assembled composite marine concrete beam-column connection node adapted to the marine environment includes concrete columns, concrete beams, connectors and annular connecting plates. The connectors include rectangular tubes and multiple pairs of clamps. The overall structure of the prefabricated assembled composite marine concrete beam-column connection node adapted to the marine environment is relatively complex. Utility Model Content
[0016] The purpose of this invention is to provide a novel prestressed GFRP reinforced UHPC beam-column joint that addresses the shortcomings of existing technologies. This novel prestressed GFRP reinforced UHPC beam-column joint features a novel design, simple structure, and easy and convenient construction.
[0017] To achieve the above objectives, this utility model is implemented through the following technical solution.
[0018] A novel prestressed GFRP reinforced UHPC beam-column joint includes a precast concrete column arranged vertically and a precast concrete beam arranged horizontally, with a column connection plate provided at the column connection end of the precast concrete beam.
[0019] The precast concrete columns and precast concrete beams are UHPC structural components, and each UHPC structural component is provided with prestressed GFRP reinforcement extending along the length of the corresponding UHPC structural component.
[0020] The beam connection position of the precast concrete column is provided with a beam connection plate, a beam support located directly below the beam connection plate, and a limiting pressure plate located directly above the beam connection plate. The beam connection plate, beam support, and limiting pressure plate protrude from the outer surface of the precast concrete column, and the beam connection plate, beam support, limiting pressure plate, and precast concrete column are an integral structure.
[0021] The column connection end of the precast concrete beam is located between the beam support and the limiting pressure plate, and the column connection end of the precast concrete beam is supported by the beam support. The column connection plate of the precast concrete beam and the beam connection plate of the precast concrete column are connected by bolts.
[0022] The precast concrete column is a box column, and the precast concrete column includes a box body with a rectangular cross-section. The beam connecting plate, the beam support, and the limiting pressure plate are respectively disposed on the outer surface of the box body.
[0023] The inner wall of the box-shaped body is provided with "L"-shaped internal reinforcing ribs at the four corners, and the internal reinforcing ribs are an integral structure with the box-shaped body.
[0024] The box-shaped main body has four vertical outer surfaces with beam connection positions, and each beam connection position is provided with a beam connection plate, a beam support, and a limiting pressure plate.
[0025] Each beam connecting plate is formed by the outward extension of the internal reinforcing ribs.
[0026] The box-shaped body has a mating plate at one end and a mating notch at the other end.
[0027] When two adjacent precast concrete columns are connected, the interlocking plate of one precast concrete column is embedded into the interlocking notch of the other precast concrete column, and the interlocking plate is fastened to the interlocking notch by bolts.
[0028] Each of the UHPC structural components has GFRP distribution ribs arranged sequentially along the length of the corresponding UHPC structural component inside.
[0029] The precast concrete beam is an I-shaped cross-section beam, and the precast concrete beam includes an upper flange, a web, and a lower flange connected sequentially from top to bottom. The column connecting plate of the precast concrete beam is the end of the web.
[0030] The column connection ends of the precast concrete beam are covered with galvanized steel plates.
[0031] The precast concrete beam has several web reinforcement ribs arranged at intervals along the length of the precast concrete beam between the upper flange and the lower flange.
[0032] Compared with existing technologies, this utility model has the following advantages: Specifically, because the novel prestressed GFRP reinforced UHPC beam-column joint of this utility model does not require a connector independent of the precast concrete column to connect the precast concrete column and the precast concrete beam 2, and does not require a ring-shaped connecting plate, the structure of this utility model is simpler than that of existing technologies. Furthermore, since it eliminates the need for casting connectors independent of the precast concrete column and the need for a post-pouring process after assembling the precast concrete connecting column and the precast concrete beam, the construction of this utility model is simpler and more convenient. Therefore, this utility model has the advantages of novel design, simple structure, and simple and convenient construction. Attached Figure Description
[0033] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.
[0034] Figure 1 This is a schematic diagram of the structure of this utility model.
[0035] Figure 2 This is a structural schematic diagram of the precast concrete column of this utility model.
[0036] Figure 3 This is a structural schematic diagram of the precast concrete column of this utility model from another perspective.
[0037] Figure 4 This is a schematic diagram of the structure of the precast concrete beam of this utility model.
[0038] Figure 5 This is a structural diagram of the connection of multiple precast concrete columns according to this utility model.
[0039] exist Figures 1 to 5 This includes:
[0040] 1-Precast concrete column; 11-Box-shaped main body; 12-Internal reinforcing rib; 13-Interlocking plate; 14-Interlocking notch; 2-Precast concrete beam; 21-Upper flange; 22-Web plate; 23-Lower flange; 24-Galvanized steel sheet outer cladding; 25-Web plate reinforcing rib; 31-Prestressed GFRP reinforcement; 32-GFRP distribution reinforcement; 4-Beam connection plate; 5-Beam support; 6-Limiting pressure plate. Detailed Implementation
[0041] The present invention will now be described in conjunction with specific embodiments.
[0042] Example 1, as Figure 1 , Figure 2 , Figure 3 as well as Figure 5 As shown, a novel prestressed GFRP reinforced UHPC beam-column joint includes a precast concrete column 1 arranged vertically and a precast concrete beam 2 arranged horizontally, with a column connection plate provided at the column connection end of the precast concrete beam 2.
[0043] Among them, the precast concrete column 1 and the precast concrete beam 2 are UHPC structural components, and each UHPC structural component is provided with prestressed GFRP reinforcement 31 extending along the length direction of the corresponding UHPC structural component.
[0044] Furthermore, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 5 As shown, the beam connection position of the precast concrete column 1 is provided with a beam connection plate 4, a beam support 5 located directly below the beam connection plate 4, and a limiting pressure plate 6 located directly above the beam connection plate 4. The beam connection plate 4, beam support 5, and limiting pressure plate 6 protrude from the outer surface of the precast concrete column 1, and the beam connection plate 4, beam support 5, limiting pressure plate 6, and precast concrete column 1 are an integral structure.
[0045] Furthermore, such as Figure 1 and Figure 5 As shown, the column connection end of the precast concrete beam 2 is located between the beam support 5 and the limiting pressure plate 6, and the column connection end of the precast concrete beam 2 is supported by the beam support 5. The column connection plate of the precast concrete beam 2 is connected to the beam connection plate 4 of the precast concrete column 1 by bolts.
[0046] Because UHPC has the advantages of ultra-high strength, low water-cement ratio and excellent durability, and can effectively reduce the cross-section of concrete components, reduce material usage and reduce component self-weight, for the precast concrete column 1 and precast concrete beam 2 cast by ultra-high performance concrete (UHPC) in this embodiment, it effectively combines the high strength and high durability of UHPC with the corrosion resistance, lightweight and high strength of GFRP reinforcement, which can effectively solve the shortcomings of traditional reinforced concrete structural components and rigid structural components in terms of strength, durability and maintenance cost.
[0047] In the construction process of the novel prestressed GFRP reinforced UHPC beam-column joint in this embodiment, the precast concrete column 1 and precast concrete beam 2 are first cast and formed. Then, the column connection end of the precast concrete beam 2 is placed into the beam connection position of the precast concrete column 1, so that the column connection end of the precast concrete beam 2 is located between the beam support 5 and the limiting pressure plate 6 at the beam connection position. Finally, the beam connection plate 4 of the precast concrete column 1 and the column connection plate of the precast concrete beam 2 are fastened together with bolts.
[0048] It should be emphasized that, since the novel prestressed GFRP-reinforced UHPC beam-column joint of this embodiment does not require a connector independent of the precast concrete column 1 to connect the precast concrete column 1 and the precast concrete beam 2, and does not require a ring-shaped connecting plate, the structure of the novel prestressed GFRP-reinforced UHPC beam-column joint of this embodiment is simpler than that of the prior art. Furthermore, since it eliminates the need to cast a connector independent of the precast concrete column 1 and to perform a post-pouring process after assembling the precast concrete connecting column and the precast concrete beam 2, the construction of the novel prestressed GFRP-reinforced UHPC beam-column joint of this embodiment is simpler and more convenient.
[0049] In summary, the novel prestressed GFRP reinforced UHPC beam-column joint of this embodiment has the advantages of novel design, simple structure, and easy and convenient construction through the above structural design.
[0050] Example 2, as Figure 1 , Figure 2 , Figure 3 as well as Figure 5 As shown, the difference between this embodiment 2 and embodiment 1 is that the precast concrete column 1 is a box column, and the precast concrete column 1 includes a box body 11 with a rectangular cross-section, and the beam connecting plate 4, beam support 5, and limiting pressure plate 6 are respectively set on the outer surface of the box body 11.
[0051] Among them, the inner wall of the box-shaped body 11 is provided with "L"-shaped internal reinforcing ribs 12 at the four corners, and the internal reinforcing ribs 12 are integral with the box-shaped body 11.
[0052] The four internal reinforcing ribs 12 located inside the box-shaped main body 11 can effectively increase the structural strength of the precast concrete column 1.
[0053] The precast concrete column 1, which adopts a box-type column structure design, has a hollow interior, and the hollow interior area can be reserved for building pipelines.
[0054] Example 3, as Figure 1 , Figure 2 , Figure 3 as well as Figure 5 As shown, the difference between this embodiment three and embodiment two is that: the four vertical outer surfaces of the box-shaped body 11 have beam connection positions, and each beam connection position is provided with a beam connection plate 4, a beam support 5, and a limiting pressure plate 6.
[0055] Each beam connecting plate 4 is formed by the outward extension of the internal reinforcing ribs 12.
[0056] Example 4, as Figure 1 , Figure 2 as well as Figure 5 As shown, the difference between this embodiment four and embodiment two is that: one end of the box-shaped body 11 is provided with a mating plate 13, and the other end of the box-shaped body 11 is provided with a mating notch 14.
[0057] It should be noted that when two adjacent precast concrete columns 1 are connected, the interlocking plate 13 of one precast concrete column 1 is embedded into the interlocking notch 14 of the other precast concrete column 1, and the interlocking plate 13 is fastened to the position of the interlocking notch 14 by bolts.
[0058] By providing interlocking plates 13 and interlocking notches 14 at both ends of the box-shaped main body 11, this fourth embodiment can effectively improve the convenience of connecting multiple precast concrete columns 1.
[0059] Example 5 differs from Example 1 in that each UHPC structural component has GFRP distribution ribs 32 arranged sequentially along the length of the corresponding UHPC structural component inside.
[0060] Example 6, as Figure 1 , Figure 4 as well as Figure 5 As shown, the difference between this sixth embodiment and the first embodiment is that the precast concrete beam 2 is an I-shaped cross-section beam, and the precast concrete beam 2 includes an upper flange 21, a web 22, and a lower flange 23 connected sequentially from top to bottom. The column connecting plate of the precast concrete beam 2 is the end of the web 22.
[0061] Example 7, as Figure 1 and Figure 4As shown, the difference between this embodiment seven and embodiment six is that the column connection end of the precast concrete beam 2 is covered with a galvanized steel plate outer casing 24.
[0062] Regarding the galvanized steel sheet outer casing 24 in this embodiment seven, it covers the outer periphery of the column connection end of the precast concrete beam 2. The tin-plated steel sheet outer casing can effectively increase the strength of the bolt connection position.
[0063] Example 8, as Figure 1 , Figure 4 as well as Figure 5 As shown, the difference between this embodiment eight and embodiment six is that: the precast concrete beam 2 has a number of web reinforcing ribs 25 arranged sequentially and at intervals along the length of the precast concrete beam 2 between the upper flange 21 and the lower flange 23.
[0064] As for the web reinforcement rib 25, it can effectively increase the structural strength of the entire precast concrete beam 2.
[0065] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of this utility model. The content of this specification should not be construed as a limitation of this utility model.
Claims
1. A novel prestressed GFRP reinforced UHPC beam-column joint, comprising a precast concrete column (1) arranged vertically and a precast concrete beam (2) arranged horizontally, wherein a column connection plate is provided at the column connection end of the precast concrete beam (2). Its features are: The precast concrete column (1) and the precast concrete beam (2) are UHPC structural components, and each UHPC structural component is provided with prestressed GFRP reinforcement (31) extending along the length direction of the corresponding UHPC structural component. The beam connection position of the precast concrete column (1) is provided with a beam connection plate (4), a beam support (5) located directly below the beam connection plate (4), and a limiting pressure plate (6) located directly above the beam connection plate (4). The beam connection plate (4), beam support (5), and limiting pressure plate (6) protrude from the outer surface of the precast concrete column (1), and the beam connection plate (4), beam support (5), limiting pressure plate (6), and precast concrete column (1) are an integral structure. The column connection end of the precast concrete beam (2) is located between the beam support (5) and the limiting pressure plate (6), and the column connection end of the precast concrete beam (2) is supported by the beam support (5). The column connection plate of the precast concrete beam (2) is connected to the beam connection plate (4) of the precast concrete column (1) by bolts.
2. The novel prestressed GFRP reinforced UHPC beam-column joint according to claim 1, characterized in that: The precast concrete column (1) is a box column, and the precast concrete column (1) includes a box body (11) with a rectangular cross-section. The beam connecting plate (4), the beam support (5), and the limiting pressure plate (6) are respectively disposed on the outer surface of the box body (11). The inner wall of the box-shaped body (11) is provided with "L"-shaped internal reinforcing ribs (12) at the four corners. The internal reinforcing ribs (12) and the box-shaped body (11) are an integral structure.
3. A novel prestressed GFRP-reinforced UHPC beam-column joint according to claim 2, characterized in that: The four vertical outer surfaces of the box-shaped body (11) have beam connection positions, and each beam connection position is provided with a beam connection plate (4), a beam support (5), and a limiting pressure plate (6). Each beam connecting plate (4) is formed by the outward extension of the internal reinforcing ribs (12).
4. A novel prestressed GFRP-reinforced UHPC beam-column joint according to claim 2, characterized in that: One end of the box-shaped body (11) is provided with a plug-in plate (13), and the other end of the box-shaped body (11) is provided with a plug-in notch (14). When two adjacent precast concrete columns (1) are connected, the interlocking plate (13) of one precast concrete column (1) is embedded into the interlocking notch (14) of the other precast concrete column (1), and the interlocking plate (13) is fastened to the position of the interlocking notch (14) by bolts.
5. A novel prestressed GFRP-reinforced UHPC beam-column joint according to claim 1, characterized in that: Each of the UHPC structural components is provided with GFRP distribution ribs (32) arranged sequentially along the length of the corresponding UHPC structural component.
6. A novel prestressed GFRP-reinforced UHPC beam-column joint according to claim 1, characterized in that: The precast concrete beam (2) is an I-shaped cross-section beam, and the precast concrete beam (2) includes an upper flange (21), a web (22), and a lower flange (23) connected from top to bottom. The column connecting plate of the precast concrete beam (2) is the end of the web (22).
7. A novel prestressed GFRP-reinforced UHPC beam-column joint according to claim 6, characterized in that: The column connection end of the precast concrete beam (2) is covered with a galvanized steel plate outer casing (24).
8. A novel prestressed GFRP-reinforced UHPC beam-column joint according to claim 6, characterized in that: The precast concrete beam (2) has a plurality of web reinforcing ribs (25) arranged sequentially at intervals along the length of the precast concrete beam (2) between the upper flange (21) and the lower flange (23).