Structure for reinforcing rusted RC beam through prefabricated and assembled UHPC parts
Through the welding connection between the prefabricated UHPC end and the middle U-shaped plate, the problems of complex construction and insufficient durability of reinforced rust reinforced concrete beams in the prior art are solved, and the cost-effective reinforcement effect is achieved, and the construction efficiency and stress performance are improved.
Patent Information
- Application Number
- CN202421689809.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-07-17
AI Technical Summary
When strengthening rusted reinforced concrete beams, the construction is complex, the cycle is long and the durability is insufficient, making it difficult to achieve an economical, fast and efficient reinforcement solution.
Prefabricated UHPC end and central U-shaped plates are used, and U-shaped prefabricated reinforced steel bars and steel plates are installed. They are connected through welding to form an integral structure under stress, simplifying construction, and internal connections are made by fixed steel bars inside the plate.
It simplifies the construction process, saves costs, improves reinforcement efficiency, ensures construction quality and stress performance, forms a stress-bearing whole, and enhances the integrity and deformation performance of the components.
Smart Images
Figure CN223190105U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of reinforced concrete beam reinforcement, in particular to a structure for reinforcing rusted RC beams by prefabricated assembled UHPC components. Background Art
[0002] As infrastructure enters a period of accelerated aging, the health of reinforced concrete beams, key load-transmitting components in bridges, buildings, and other structures, is crucial to their overall safety and service life. However, due to environmental factors, particularly chloride-containing environments, steel corrosion has become a common and serious problem. Rebar corrosion not only reduces cross-sectional area and degrades the mechanical properties of the steel, but also causes concrete spalling, significantly reducing the structure's overall load-bearing capacity and deformation capacity, seriously impacting structural safety.
[0003] Traditional reinforcement methods include gluing steel plates, gluing fiber reinforced plastic (FRP), and sprayed concrete, but these methods often suffer from complex construction, long construction cycles, and insufficient long-term durability. For example, while gluing steel plates can improve load-bearing capacity, they are prone to further failure in corrosive environments. FRP offers excellent corrosion resistance and reinforcement effectiveness, but its performance may degrade in high-temperature environments, and there is a risk that its bond strength may decrease over time. Therefore, simplifying the reinforcement process, improving reinforcement efficiency, and enhancing the stability and durability of reinforcement results have become urgent technical challenges that need to be addressed.
[0004] Ultra-high-performance concrete (UHPC) is considered a highly promising repair and reinforcement material due to its exceptional durability, ultra-high mechanical properties, and good bonding properties. UHPC's unique material properties, such as its extremely fine pore structure and high-density fiber reinforcement, enable it to demonstrate superior performance compared to traditional materials in reinforcement applications. The use of prefabricated UHPC components offers a new approach to reinforcing corroded reinforced concrete beams. They can be prefabricated in factories, reducing the complexity of on-site construction. Through precise design and manufacturing, they improve the quality of the bonding interface and provide more reliable load-bearing performance and durability.
[0005] However, when using UHPC prefabricated components to reinforce corroded reinforced concrete beams, how to ensure their effective integration with the original structure and how to design an economical, fast and efficient reinforcement solution are key technical issues that need to be solved urgently. Utility Model Content
[0006] The purpose of the utility model is to overcome the defects of the prior art and provide a structure for reinforcing corroded RC beams by prefabricated assembled UHPC components.
[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0008] A structure for reinforcing corroded RC beams using prefabricated assembled UHPC components includes prefabricated UHPC end U-shaped plates sleeved at both ends of the RC beam to be reinforced, and a plurality of prefabricated UHPC middle U-shaped plates disposed between the two prefabricated UHPC end U-shaped plates. Prefabricated reinforcing steel plates are disposed within the prefabricated UHPC end U-shaped plates and the prefabricated UHPC middle U-shaped plates. Prefabricated reinforcing steel bars are disposed on both sides of the prefabricated reinforcing steel plates. The prefabricated reinforcing steel bars and the prefabricated reinforcing steel plates both adopt a U-shaped structure. The two ends of the prefabricated reinforcing steel bars are connected by prefabricated circular hole fixing steel plates, and the two ends of the prefabricated reinforcing steel plates are connected by prefabricated square hole fixing steel plates.
[0009] Preferably, UHPC concrete is poured outside the two prefabricated reinforcing steel bars and the prefabricated reinforcing steel plate to form a prefabricated UHPC end U-shaped plate or a prefabricated UHPC middle U-shaped plate.
[0010] Preferably, both ends of the prefabricated reinforcing steel bars and prefabricated reinforcing steel plates extend out of the side walls of the prefabricated UHPC end U-shaped plates or the prefabricated UHPC middle U-shaped plates.
[0011] Preferably, both ends of the prefabricated round hole fixing steel plate are provided with prefabricated round holes that are compatible with the cross-section of the prefabricated reinforcing steel bars, and both ends of the prefabricated square hole fixing steel plate are provided with prefabricated square holes that are compatible with the cross-section of the prefabricated reinforcing steel plate.
[0012] Preferably, the connection between the prefabricated reinforcing steel bars and the prefabricated round hole fixing steel plate, and the connection between the prefabricated reinforcing steel plate and the prefabricated square hole fixing steel plate are both welded.
[0013] Preferably, UHPC plate reserved grooves are provided on both sides and the bottom outer surfaces of the prefabricated UHPC end U-shaped plate and the prefabricated UHPC middle U-shaped plate. The UHPC plate reserved groove on the prefabricated UHPC end U-shaped plate passes through one end thereof close to the prefabricated UHPC middle U-shaped plate, and the UHPC plate reserved groove on the prefabricated UHPC middle U-shaped plate passes through its outer surface.
[0014] Preferably, the prefabricated reinforcement steel bars and prefabricated reinforcement steel plates pass through their corresponding reserved slots in the UHPC plates.
[0015] Preferably, the prefabricated UHPC end U-shaped plate and the prefabricated UHPC middle U-shaped plate, which are sleeved on the RC beam to be reinforced, have UHPC plate reserved grooves on both sides and the outer surface of the bottom thereof connected to each other to form steel bar fixing grooves, in which plate fixing steel bars are provided and fixed by pouring UHPC concrete.
[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:
[0017] In this utility model, by using prefabricated components, the construction process is simplified, construction materials are saved, construction costs are reduced, and the quality of construction materials is guaranteed, thereby improving the efficiency of reinforcement and promoting the economical and efficient implementation of the reinforcement project. Moreover, when connecting the prefabricated UHPC U-shaped panels, bolts are not used to connect the components, but fixed steel bars within the panels are used to connect the components from the inside. The reinforcement method is to weld the prefabricated reinforcement steel plates on the sides of the reserved grooves of the UHPC panels. The construction process is simple and convenient, saving construction time. The reinforcement method is novel and the force transmission is effective. The fixed steel bars within the panels connect the prefabricated UHPC end U-shaped panels and the prefabricated UHPC middle U-shaped panels from the inside, which not only enhances the integrity of the components, forming a force-bearing whole with good force-bearing performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the assembly structure of the prefabricated UHPC components and the RC beams to be reinforced in the utility model;
[0019] Figure 2 This is the front view of the UHPC end U-shaped plate of the utility model;
[0020] Figure 3 This is a schematic diagram of the UHPC end U-shaped plate structure of the utility model;
[0021] Figure 4 This is the front view of the prefabricated UHPC end U-shaped plate of the present invention;
[0022] Figure 5 This is a schematic diagram of the structure of the prefabricated UHPC middle U-shaped plate of the utility model;
[0023] Figure 6 It is a prefabricated reinforcement steel bar of the utility model;
[0024] Figure 7 It is a prefabricated reinforced steel plate of the utility model;
[0025] Figure 8 It is a prefabricated circular hole fixed steel plate of the utility model;
[0026] Figure 9 The utility model relates to a prefabricated square hole fixing steel plate.
[0027] Figure 1: RC beam to be reinforced; 2. Prefabricated UHPC end U-shaped plate; 3. Prefabricated UHPC middle U-shaped plate; 4. Prefabricated reinforcing steel bars; 5. Prefabricated reinforcing steel plate; 6. Prefabricated round hole fixing steel plate; 7. Prefabricated square hole fixing steel plate; 8. UHPC plate reserved groove; 9. Fixed steel bars in the plate. DETAILED DESCRIPTION
[0028] The following examples further illustrate the specific implementation of the structure of the present invention for reinforcing a corroded RC beam by prefabricated and assembled UHPC components. The structure of the present invention for reinforcing a corroded RC beam by prefabricated and assembled UHPC components is not limited to the description of the following examples.
[0029] Example 1:
[0030] A structure of prefabricated UHPC components to reinforce corroded RC beams, such as Figure 1-9 As shown, it includes prefabricated UHPC end U-shaped plates 2 sleeved on both ends of the RC beam 1 to be reinforced, and a plurality of prefabricated UHPC middle U-shaped plates 3 arranged between the two prefabricated UHPC end U-shaped plates 2. Prefabricated reinforcing steel plates 5 are provided in the prefabricated UHPC end U-shaped plates 2 and the prefabricated UHPC middle U-shaped plates 3. Prefabricated reinforcing steel bars 4 are provided on both sides of the prefabricated reinforcing steel plates 5. The prefabricated reinforcing steel bars 4 and the prefabricated reinforcing steel plates 5 both adopt a U-shaped structure. The two ends of the prefabricated reinforcing steel bars 4 are connected by prefabricated round hole fixing steel plates 6, and the two ends of the prefabricated reinforcing steel plates 5 are connected by prefabricated square hole fixing steel plates 7.
[0031] In a possible implementation, UHPC concrete is poured outside the two prefabricated reinforcing steel bars 4 and the prefabricated reinforcing steel plates 5 to form a prefabricated UHPC end U-shaped plate 2 or a prefabricated UHPC middle U-shaped plate 3 .
[0032] In a possible embodiment, both ends of the prefabricated reinforcing steel bars 4 and the prefabricated reinforcing steel plates 5 extend out of the side walls of the prefabricated UHPC end U-shaped plate 2 or the prefabricated UHPC middle U-shaped plate 3 .
[0033] In a possible embodiment, both ends of the prefabricated round hole fixing steel plate 6 are provided with prefabricated round holes that are compatible with the cross-section of the prefabricated reinforcing steel bar 4, and both ends of the prefabricated square hole fixing steel plate 7 are provided with prefabricated square holes that are compatible with the cross-section of the prefabricated reinforcing steel plate 5.
[0034] In a possible implementation, welding is used for the connection between the prefabricated reinforcing steel bar 4 and the prefabricated round hole fixing steel plate 6 , and for the connection between the prefabricated reinforcing steel plate 5 and the prefabricated square hole fixing steel plate 7 .
[0035] In one possible embodiment, UHPC plate reserved grooves 8 are provided on both sides and the bottom outer surfaces of the prefabricated UHPC end U-shaped plate 2 and the prefabricated UHPC middle U-shaped plate 3. The UHPC plate reserved groove 8 on the prefabricated UHPC end U-shaped plate 2 passes through one end thereof close to the prefabricated UHPC middle U-shaped plate 3, and the UHPC plate reserved groove 8 on the prefabricated UHPC middle U-shaped plate 3 passes through its outer surface.
[0036] In a possible implementation, the prefabricated reinforcement steel bars 4 and the prefabricated reinforcement steel plates 5 pass through their corresponding reserved slots 8 of the UHPC plates.
[0037] In one possible embodiment, the prefabricated UHPC end U-shaped plate 2 and the prefabricated UHPC middle U-shaped plate 3 are sleeved on the RC beam 1 to be reinforced, and the UHPC plate reserved grooves 8 on both sides and the bottom outer surface are connected to each other to form a steel bar fixing groove. The steel bar fixing groove is provided with an inner plate fixing steel bar 9 and is fixed by pouring UHPC concrete.
[0038] In one possible embodiment, the RC beam 1 to be reinforced is provided with a plate connected to the beam. Precast UHPC end U-shaped plates 2 and precast UHPC middle U-shaped plates 3 are wrapped around the periphery of the RC beam 1 to be reinforced, with a certain thickness of UHPC later cast between them. The precast UHPC end U-shaped plates 2 and precast UHPC middle U-shaped plates 3 are in close contact with each other. The precast circular holes of the precast circular hole fixing steel plates 6 match the connection surface of the precast reinforcing steel bars 4, while the precast square holes of the precast square hole fixing steel plates 7 match the connection surface of the precast reinforcing steel plates 5.
[0039] Furthermore, prefabricated reinforcing steel bars 4 and prefabricated reinforcing steel plates 5 are arranged in the prefabricated UHPC end U-shaped groove 2 and the prefabricated UHPC middle U-shaped groove 3. The prefabricated reinforcing steel bars 4 and the prefabricated reinforcing steel plates 5 are inserted into the top of the RC beam 1 to be reinforced by drilling during structural reinforcement. Then, the prefabricated circular hole fixing steel plate 6 is connected to the prefabricated reinforcing steel bars 4 through the reserved circular holes, so that the contact surface between the prefabricated circular hole fixing steel plate 6 and the beam-slab is in close contact with the beam-slab, and the connection between the prefabricated reinforcing steel bars 4 and the prefabricated circular hole fixing steel plate 6 is welded. The prefabricated square hole fixing steel plate 7 is connected to the prefabricated reinforcing steel plate 5 through the reserved square holes, so that the contact surface between the prefabricated square hole fixing steel plate 7 and the beam-slab is in close contact with the beam-slab, and the connection between the prefabricated reinforcing steel plate 5 and the prefabricated square hole fixing steel plate 7 is welded.
[0040] Furthermore, the prefabricated UHPC end U-shaped trough 2 and the prefabricated UHPC middle U-shaped trough 3 are provided with UHPC plate reserved grooves 8 on both sides and the outer surface of the bottom. After the prefabricated UHPC end U-shaped plate 2 and the prefabricated UHPC middle U-shaped plate 3 are assembled and connected, the plate internal fixed steel bars 9 are welded to the prefabricated reinforcement steel plates 5 on the sides of the UHPC plate reserved groove 8. The connection method is welding connection, and the construction and installation are simple. The plate internal fixed steel bars 9 connect the prefabricated UHPC end U-shaped plate 2 and the prefabricated UHPC middle U-shaped plate 3 from the inside, so that the pressure of a single U-shaped plate supporting and maintaining the RC beam 1 to be reinforced can be transmitted to all U-shaped plates through the plate internal fixed steel bars 9, so that the prefabricated UHPC end U-shaped plate 2 and the prefabricated UHPC middle U-shaped plate 3 form a force-bearing whole. The bending performance of the steel bars is high, the bending capacity of the U-shaped plate is improved, and the deformation performance of the U-shaped plate is better matched with the RC beam 1 to be reinforced.
[0041] Furthermore, after welding is completed, UHPC concrete is poured into the reserved groove 8 of the UHPC plate. A 20mm post-casting strip is reserved between the precast UHPC end U-shaped plate 2 and the precast UHPC middle U-shaped plate 3 and the beam, and UHPC concrete is poured into the post-casting strip after welding is completed.
[0042] In one possible implementation, Figure 2 As shown, prefabricated reinforcing steel bars 4 and prefabricated reinforcing steel plates 5 are embedded in the U-shaped groove 2 at the prefabricated UHPC end. The center points of the prefabricated reinforcing steel bars 4 and the prefabricated reinforcing steel plates 5 are on a straight line, and the straight line and the side plate width line of the prefabricated UHPC end U-shaped plate 2 are horizontal lines.
[0043] In one possible implementation, Figure 3 As shown, the prefabricated UHPC end U-shaped plate 2 has two UHPC plate reserved grooves 8 prefabricated on the outer walls of the side plates and the outer walls of the bottom plate. The UHPC plate reserved grooves 8 start from one side of the prefabricated UHPC end U-shaped plate 2 and end at the embedded prefabricated reinforcement steel plate 5. The groove cross-section is expanded at the embedded prefabricated reinforcement steel plate 5 to expose the embedded prefabricated reinforcement steel plate 5 of equal area.
[0044] In one possible implementation, Figure 4 As shown, prefabricated reinforcing steel bars 4 and prefabricated reinforcing steel plates 5 are embedded in the prefabricated UHPC middle U-shaped plate 3. The center points of the prefabricated reinforcing steel bars 4 and the prefabricated reinforcing steel plates 5 are on a straight line, and the straight line and the width line of the side plates of the prefabricated UHPC middle U-shaped plate 3 are horizontal lines.
[0045] In one possible implementation, Figure 5 As shown, two UHPC plate pre-grooves 8 are prefabricated on the outer side and bottom walls of the prefabricated UHPC end U-shaped plate 2. These UHPC plate pre-grooves 8 extend through the outer side and bottom walls of the prefabricated UHPC middle U-shaped plate 3. The cross-section of the prefabricated UHPC end U-shaped plate 2, where the prefabricated reinforcement steel plates 5 are embedded, is enlarged to expose the same area of the embedded reinforcement steel plates 5.
[0046] In one possible implementation, Figure 8 As shown, the diameter of the reserved circular hole in the steel plate is consistent with the diameter of the prefabricated reinforcement steel bar 4.
[0047] In one possible implementation, Figure 9 As shown, the length of the square hole reserved in the steel plate is consistent with the width of the prefabricated reinforcement steel plate 5, and the width of the square hole reserved in the steel plate is consistent with the thickness of the prefabricated reinforcement steel plate 5.
[0048] By adopting the above technical means:
[0049] The use of prefabricated components simplifies the construction process, saves construction materials, reduces construction costs and ensures the quality of construction materials, improves the efficiency of reinforcement, and promotes the economical and efficient implementation of reinforcement projects.
[0050] Instead of bolting the components together, the prefabricated UHPC U-shaped panels are connected from the inside using internally fixed steel bars. The reinforcement is welded to the prefabricated reinforcement plates on the sides of the reserved slots in the UHPC panels. This simple and convenient construction process saves construction time. This novel reinforcement method effectively transmits force. The internally fixed steel bars connect the prefabricated UHPC end and middle U-shaped panels from the inside, enhancing the integrity of the components and forming a single, force-bearing unit with excellent load-bearing performance.
[0051] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.
Claims
1. A structure for reinforcing corroded RC beams using prefabricated UHPC components, characterized by: The invention comprises a prefabricated UHPC end U-shaped plate (2) sleeved on both ends of a RC beam (1) to be reinforced, and a plurality of prefabricated UHPC middle U-shaped plates (3) arranged between the two prefabricated UHPC end U-shaped plates (2), wherein the prefabricated UHPC end U-shaped plates (2) and the prefabricated UHPC middle U-shaped plates (3) are both provided with prefabricated reinforcing steel plates (5), both sides of the prefabricated reinforcing steel plates (5) are provided with prefabricated reinforcing steel bars (4), the prefabricated reinforcing steel bars (4) and the prefabricated reinforcing steel plates (5) both adopt a U-shaped structure, the two ends of the prefabricated reinforcing steel bars (4) are connected by a prefabricated circular hole fixing steel plate (6), and the two ends of the prefabricated reinforcing steel plates (5) are connected by a prefabricated square hole fixing steel plate (7).
2. The structure of prefabricated and assembled UHPC components for reinforcing corroded RC beams according to claim 1, characterized in that: UHPC concrete is poured outside the two prefabricated reinforcing steel bars (4) and the prefabricated reinforcing steel plate (5) to form a prefabricated UHPC end U-shaped plate (2) or a prefabricated UHPC middle U-shaped plate (3).
3. The structure of prefabricated and assembled UHPC components for reinforcing corroded RC beams according to claim 1, characterized in that: Both ends of the prefabricated reinforcing steel bars (4) and the prefabricated reinforcing steel plates (5) extend out of the side walls of the prefabricated UHPC end U-shaped plates (2) or the prefabricated UHPC middle U-shaped plates (3).
4. The structure of prefabricated and assembled UHPC components for reinforcing corroded RC beams according to claim 1, characterized in that: Both ends of the prefabricated circular hole fixing steel plate (6) are provided with prefabricated circular holes that match the cross-section of the prefabricated reinforcing steel bar (4), and both ends of the prefabricated square hole fixing steel plate (7) are provided with prefabricated square holes that match the cross-section of the prefabricated reinforcing steel plate (5).
5. The structure of reinforcing corroded RC beams by prefabricated and assembled UHPC components according to claim 1, characterized in that: The connection between the prefabricated reinforcing steel bar (4) and the prefabricated circular hole fixing steel plate (6), and the connection between the prefabricated reinforcing steel plate (5) and the prefabricated square hole fixing steel plate (7) are both welded.
6. The structure of reinforcing corroded RC beams by prefabricated and assembled UHPC components according to claim 1, characterized in that: Both sides and the bottom outer surfaces of the prefabricated UHPC end U-shaped plate (2) and the prefabricated UHPC middle U-shaped plate (3) are provided with UHPC plate reserved grooves (8); the UHPC plate reserved grooves (8) on the prefabricated UHPC end U-shaped plate (2) pass through one end thereof close to the prefabricated UHPC middle U-shaped plate (3); and the UHPC plate reserved grooves (8) on the prefabricated UHPC middle U-shaped plate (3) pass through the outer surface thereof.
7. The structure of reinforcing corroded RC beams by prefabricated and assembled UHPC components according to claim 6, characterized in that: The prefabricated reinforcing steel bars (4) and the prefabricated reinforcing steel plates (5) pass through their corresponding UHPC plate reserved slots (8).
8. The structure of prefabricated and assembled UHPC components for reinforcing corroded RC beams according to claim 6, characterized in that: A prefabricated UHPC end U-shaped plate (2) and a prefabricated UHPC middle U-shaped plate (3) are sleeved on a RC beam (1) to be reinforced, and UHPC plate reserved grooves (8) on both sides and the outer surface of the bottom thereof are interconnected to form a steel bar fixing groove, wherein the steel bar fixing groove is provided with a plate inner fixing steel bar (9) and is fixed by pouring UHPC concrete.