Prestressed concrete layer wrapping type reinforced concrete beam reinforcing structure
By setting reinforcing bars on the beam and connecting them with clamps and fasteners, and combining UHPC and FRP bars, the problems of complex construction and high cost of existing reinforcement methods are solved, and a high-efficiency and low-cost reinforcement effect is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGAN UNIV
- Filing Date
- 2025-07-02
- Publication Date
- 2026-05-19
AI Technical Summary
Existing building reinforcement methods are complex to construct, costly, and fail to fully utilize material properties. In particular, the steel-bonded reinforcement method is highly dependent on the quality of the interface adhesive, resulting in unsatisfactory reinforcement effects.
The prestressed concrete layer encased in reinforced concrete beams is used to strengthen the structure. By setting reinforcing bars on the beam and connecting them with clamps and fasteners, prestress is provided to improve the load-bearing capacity. The use of UHPC concrete and FRP bars simplifies the construction process and reduces costs.
The reinforcement effect is significant, the construction is simple and low-cost, and it has a wide range of applications. It can significantly improve the load-bearing capacity of the beam and ensure that the new and old structures work together.
Smart Images
Figure CN224259970U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of structural reinforcement technology, specifically to a prestressed concrete layer-encased reinforced concrete beam reinforcement structure. Background Technology
[0002] With the continuous development of the construction industry, the reinforcement and renovation of existing building structures has become an unavoidable issue. Strengthening reinforced concrete beams to improve their load-bearing capacity and thus meet their functional requirements is a crucial aspect of this work. Currently, commonly used traditional reinforcement structures include enlarging the cross-section, external steel cladding, steel bonding, and prestressed reinforcement. However, these structures all have their shortcomings, mainly in terms of complex construction processes, failure to fully utilize material properties, and, in particular, the effectiveness of steel bonding depends heavily on the quality of the interfacial adhesive, and its high cost.
[0003] In view of this, this utility model is hereby proposed. Utility Model Content
[0004] This utility model provides a prestressed concrete layer-encased reinforced concrete beam reinforcement structure. The reinforcement method is simple, low-cost, widely applicable, and has a reliable reinforcement effect.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] This utility model proposes a prestressed concrete layer-encased reinforced concrete beam reinforcement structure, including reinforcement concrete set on the beam body, the reinforcement concrete having reinforcing ribs inside, the reinforcing ribs passing through the reinforcement concrete and having both ends fixedly connected to the beam body by fasteners, one end of the reinforcing rib being connected to the fasteners by a connector, and the other end being connected to the fasteners by a clamp.
[0007] Specifically, the clamp includes an outer cylinder, inside which is an inner cylinder. Hoops are provided on both sides of the inner cylinder. The hoops penetrate the side wall of the inner cylinder, with one end located inside the inner cylinder and the other end located between the inner and outer cylinders and connected to the side wall of the inner cylinder via a spring. The hoops and the outer cylinder are rotatably connected by a pin.
[0008] Specifically, the clamp is set at an angle.
[0009] Specifically, the corresponding clamps are located at one end inside the inner cylinder and are in contact with each other.
[0010] Specifically, the hoop is semi-circular in shape, and a connecting piece is provided at one end between the inner cylinder and the outer cylinder. One end of the spring is connected to the connecting piece, and the other end is connected to the inner cylinder.
[0011] Specifically, the length of the portion of the clamp located between the inner cylinder and the outer cylinder is less than the distance between the inner cylinder and the outer cylinder.
[0012] Specifically, the diameter of the reinforcing rib is greater than the maximum width of the gap between the corresponding hoop.
[0013] Specifically, the fastener is an L-shaped angle steel, and the horizontal steel plate of the fastener is fixedly connected to the beam body by bolts, while the vertical steel plate is connected to the reinforcing rib.
[0014] Specifically, the reinforcing rib is an FRP (fiber reinforced polymer) rib.
[0015] Specifically, the reinforced concrete is UHPC (ultra-high performance concrete).
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0017] (1) This utility model has a simple structure and adopts a combination of reinforcing ribs and reinforced concrete. It makes full use of the performance of the reinforcing ribs, improves the internal force of the beam to be reinforced by the prestress provided by the reinforcing ribs, and greatly improves its bearing capacity by using the constraint effect of the reinforcing ribs on the beam to be reinforced. After reinforcement, the old and new structures can work together, the reinforcement effect is significant, and the scope of application is wide. It can be used for the reinforcement of beams of various sizes.
[0018] (2) One end of the reinforcing bar of this utility model is connected to the fixing part through the connector, and the other end is connected to the fixing part through the clamp with self-locking function. After the tensioning equipment tensions one end of the reinforcing bar connecting clamp, the clamp can automatically lock onto the reinforcing bar, so that the reinforcing bar obtains stable prestress, thereby achieving the purpose of strengthening and reinforcing. The application of this clamp makes the reinforcement structure and construction method of the prestressed concrete layer outer-encased reinforced concrete beam more convenient and faster, and the cost is lower. This utility model has strong versatility, and the same clamp can adapt to reinforcing bars of different diameters. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall reinforcement structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the structure of the clamp of this utility model;
[0021] Figure 3 This is a schematic diagram of the connection between the inner cylinder and the hoop of this utility model;
[0022] Figure 4 This is a schematic diagram of the outer cylinder of this utility model;
[0023] Figure 5 This is a schematic diagram of the structure of the hoop of this utility model;
[0024] Reference numerals: 1. Beam; 2. Fastener; 3. Reinforcing rib; 4. Reinforced concrete; 5. Clamp; 51. Hoop; 52. Spring; 53. Inner cylinder; 54. Outer cylinder; 6. Bolt. Detailed Implementation
[0025] The present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.
[0026] Example 1
[0027] refer to Figure 1 This embodiment proposes a prestressed concrete layer-encased reinforced concrete beam reinforcement structure, including reinforcement concrete 4 set on the beam 1 to be reinforced. The reinforcement concrete 4 is provided with reinforcing ribs 3. After the reinforcing ribs 3 pass through the reinforcement concrete 4, both ends are fixedly connected to the beam 1 by fasteners 2. One end of the reinforcing rib 3 is connected to the fastener 2 by a connector, and the other end is connected to the fastener 2 by a clamp 5. The number of reinforcing ribs 3 can be determined according to design requirements. This embodiment takes two as an example.
[0028] In this embodiment, the construction process is carried out according to the following steps:
[0029] Step 1: Determine the installation positions of the two fasteners 2 on the beam 1 according to the design drawings. Drill holes in the beam 1 to install the fasteners 2. Before installation, the location of the existing steel bars can be determined by the original structural drawings. Avoid the existing steel bars when drilling to prevent damage to the stressed steel bars. Also pay attention to the exposed position of the reinforcing bars 3 so as not to affect the pouring of the reinforcement concrete 4 later.
[0030] Step 2: Roughen the bottom and sides of the beam 1 to be processed, exposing the coarse aggregate. Then, use a high-pressure water gun to wash the surface to remove surface slag, impurities, etc., to ensure effective connection between the reinforced concrete 4 to be poured and the beam 1 to be processed.
[0031] Step 3: Secure one end of the reinforcing rib 3 to a fixing part 2 using bolt 6, and connect the other end of the reinforcing rib 3 to another fixing part 2 using clamp 5. Use a tensioning device to tension the end of the reinforcing rib 3 connected to the clamp 5. Monitor the magnitude of the prestress in real time during the tensioning process. Stop tensioning when the prestress on the reinforcing rib 3 reaches the design requirements. During the tensioning process, the tensioning device can fix the position of the clamp 5, so that the reinforcing rib 3 and the clamp 5 move relative to each other.
[0032] Step 4: Pour reinforcing concrete 4 into the roughened area of the beam body 1 to be processed, so that the reinforcing bars 3 pass through the reinforcing concrete 4.
[0033] Step 5: Remove the formwork 24-48 hours after the reinforcement concrete 4 is poured.
[0034] Step Six: After the overall reinforced structure has reached the design requirements, the excess length of the reinforcing ribs at one end can be removed or cut off as needed.
[0035] As can be seen from the above steps, the reinforcement structure proposed in this utility model is simple to construct, low in cost, can give full play to the performance of the reinforcing rib 3, and has a good reinforcement effect.
[0036] refer to Figures 2 to 4 In the above embodiments, the clamp 5 includes an outer cylinder 54, inside which is an inner cylinder 53. Hoops 51 are correspondingly arranged on both sides of the inner cylinder 53. Each hoop 51 penetrates the side wall of the inner cylinder 53, with one end located inside the inner cylinder 53 and the other end located between the inner cylinder 53 and the outer cylinder 54 and connected to the side wall of the inner cylinder 53 via a spring 52. The hoop 51 and the outer cylinder 54 are rotatably connected by a pin. To ensure that the reinforcing rib 3 can be reliably locked by the clamp 5, the diameter of the reinforcing rib 3 is greater than the maximum width of the gap between the corresponding hoops 51. The hoop 51 is in contact with the outer cylinder 54 in the initial state. The maximum distance between the corresponding hoops 51 and the diameter of the reinforcing rib 3 can be determined according to design requirements.
[0037] In this embodiment, since the diameter of the reinforcing rib 3 is greater than the maximum width of the gap between the corresponding clamps 51, during the tensioning process in step three, the reinforcing rib 3 passes through the gap between the corresponding clamps 51, which will compress the clamps 51 to rotate around the pin. During the rotation of the clamps 51, the distance between the corresponding clamps 51 will gradually increase, and the spring 52 will continue to compress until the reinforcing rib 3 passes through the gap between the corresponding clamps 51. At this time, under the action of the restoring force of the spring 52, the corresponding clamps 51 will lock the reinforcing rib 3. During the tensioning process, the inner cylinder of the clamp 5 provides an action platform for the clamps 51, and the outer cylinder provides an operation platform for the tensioning equipment. After the tensioning is completed, the clamps 51 will constrain and tighten the reinforcing rib 3 under the action of the spring 52 to prevent the reinforcing rib 3 from shrinking back.
[0038] refer to Figure 3 In order to ensure the locking of the reinforcing rib 3 of the clamp 5, the hoop 51 is set at an angle, and the ends of the corresponding hoop 51 located inside the inner cylinder 53 are in contact with each other. The spring 52 is in a compressed state. During the construction process, the opening of the corresponding hoop 51 is opposite to the direction of movement when the reinforcing rib 3 is tensioned, so as to ensure that the reinforcing rib 3 cannot be retracted after the tensioning is completed.
[0039] refer to Figure 5In the above embodiments, the hoop 51 is semi-circular in shape, and a connecting piece is provided at one end between the inner cylinder 53 and the outer cylinder 54. One end of the spring 52 is connected to the connecting piece, and the other end is connected to the inner cylinder 53. By connecting the spring 52 and the hoop 51 through the connecting piece, the force on the spring 52 can be made to be as straight as possible, thereby ensuring that the hoop 51 locks the reinforcing rib 3. The larger the diameter of the reinforcing rib 3, the larger the rotation angle of the hoop 51, and the closer the hoop 51 is to the surface of the reinforcing rib 3, thereby ensuring that the reinforcing rib 3 is locked.
[0040] In order to expand the applicability of clamp 5, the length of the part of clamp 51 located between inner cylinder 53 and outer cylinder 54 is less than the distance between inner cylinder 53 and outer cylinder 54, so that outer cylinder 54 does not affect the rotation of clamp 51.
[0041] refer to Figure 1 In order to facilitate the installation of the reinforcing rib 3, in the above embodiment, the fastener 2 is an L-shaped angle steel. The horizontal steel plate of the fastener 2 is fixedly connected to the beam 1 by bolts 6, and the vertical steel plate is connected to the reinforcing rib 3. The clamp 5 is located on the outside of the vertical steel plate of the corresponding fastener 2.
[0042] In the above embodiments, the reinforcing rib 3 is preferably an FRP (fiberglass reinforced plastic) rib, and the reinforced concrete 4 is preferably UHPC (ultra-high-performance concrete). FRP ribs have advantages such as high strength, corrosion resistance, high durability, low density, fatigue resistance, and high tensile strength, playing an important role in controlling cracks in the beam 1 and improving its load-bearing capacity and resistance to deformation. UHPC has high durability and mechanical properties. Combining and fully utilizing these two materials can greatly improve the reinforcement effect of the concrete beam. The spring 52 is preferably a carbon steel spring 52, which has a high elastic modulus and strength, ensuring that the reinforcing rib 3 is locked in place.
[0043] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model.
[0044] It should be understood that this utility model is not limited to the content already described above, and modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.
Claims
1. A prestressed concrete externally wrapped reinforced concrete beam strengthening structure, characterized by, The reinforcement includes reinforced concrete (4) installed on the beam (1), and reinforced ribs (3) are installed inside the reinforced concrete (4). After the reinforced ribs (3) pass through the reinforced concrete (4), both ends are fixedly connected to the beam (1) through fasteners (2). One end of the reinforced ribs (3) is connected to the fasteners (2) through a connector, and the other end is connected to the fasteners (2) through a clamp (5).
2. The prestressed concrete layer-encased reinforced concrete beam reinforcing structure according to claim 1, characterized by The clamp (5) includes an outer cylinder (54), an inner cylinder (53) is provided inside the outer cylinder (54), and hoops (51) are provided on both sides of the inner cylinder (53). The hoops (51) penetrate the side wall of the inner cylinder (53), one end is located inside the inner cylinder (53), and the other end is located between the inner cylinder (53) and the outer cylinder (54) and is connected to the side wall of the inner cylinder (53) through a spring (52). The hoops (51) and the outer cylinder (54) are rotatably connected by a pin.
3. The prestressed concrete layer-encased reinforced concrete beam reinforcing structure according to claim 2, characterized by The hoop (51) is set at an angle.
4. The prestressed concrete layer-encased reinforced concrete beam reinforcing structure according to claim 2, characterized by The corresponding hoop (51) is located at one end inside the inner cylinder (53) and is in contact with each other.
5. The prestressed concrete layer-encased reinforced concrete beam reinforcing structure according to claim 2, characterized by The hoop (51) is semi-circular, and a connecting piece is provided at one end between the inner cylinder (53) and the outer cylinder (54). One end of the spring (52) is connected to the connecting piece, and the other end is connected to the inner cylinder (53).
6. The prestressed concrete layer-encased reinforced concrete beam reinforcing structure according to claim 2, characterized by The length of the portion of the clamp (51) located between the inner cylinder (53) and the outer cylinder (54) is less than the distance between the inner cylinder (53) and the outer cylinder (54).
7. The prestressed concrete layer-encased reinforced concrete beam reinforcing structure according to claim 2, characterized by The diameter of the reinforcing rib (3) is greater than the maximum width of the gap between the corresponding hoop (51).
8. The prestressed concrete externally wrapped reinforced concrete beam strengthening structure according to claim 1, characterized in that, The fastener (2) is an L-shaped angle steel. The horizontal steel plate of the fastener (2) is fixedly connected to the beam (1) by bolts (6), and the vertical steel plate is connected to the reinforcing rib (3).
9. The prestressed concrete layer-encased reinforced concrete beam reinforcing structure according to claim 1, characterized by The reinforcing bar (3) is an FRP bar.
10. The prestressed concrete layer-encased reinforced concrete beam reinforcing structure according to claim 1, characterized by The reinforced concrete (4) is UHPC.