A beam reinforced with prestressed carbon fiber plate

Abstract

This utility model discloses a beam reinforced with prestressed carbon fiber plate, relating to the application of carbon fiber plates. The beam includes a fixed end and a tensioning end on its lower surface, with a carbon fiber plate body positioned between the fixed end and the tensioning end. This utility model employs a first fixed frame, a second fixed frame, anchor blocks, and wedge blocks. First, a laser is used to mark the bottom of the beam. Then, holes are drilled at the bottom of the beam. The first and second fixed frames are aligned with the drilled holes. Anchor bolts are then inserted into the bolt holes until they reach the interior of the drilled holes. Both the first and second fixed frames are fixed to the beam. Anchor blocks are then placed within the first and second fixed frames. One end of the carbon fiber plate body is pulled into the anchor block within the first fixed frame. Finally, wedge blocks are inserted into wedge grooves, tightly clamping one end of the carbon fiber plate body, thereby applying prestress to the carbon fiber plate body.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber plate application technology, and in particular to a beam reinforced with prestressed carbon fiber plate. Background Technology

[0002] In the fields of civil engineering and construction, reinforced concrete beams, as primary load-bearing components, are widely used in bridges, buildings, and other infrastructure. With increasing service life, existing structures may face insufficient load-bearing capacity due to material aging, higher design standards, or increased loads. Furthermore, environmental erosion, fatigue damage, and construction defects can also lead to structural performance degradation, affecting their safety and durability. Traditional reinforcement techniques (such as external steel plate bonding, cross-section enlargement, or external steel cladding) are effective to a certain extent, but they have limitations such as complex construction, significant increase in self-weight, or insufficient corrosion resistance. With the development of new materials technology, carbon fiber reinforced composite materials, due to their excellent tensile strength and durability, are widely used in the reinforcement and repair of concrete structures.

[0003] Traditional carbon fiber plate reinforcement methods suffer from difficulties in applying prestress and insufficient anchoring reliability, resulting in poor synergistic stress distribution between the carbon fiber plate and the beam, thus affecting the reinforcement effect. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a method for reinforcing beams using prestressed carbon fiber plates.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A beam reinforced with prestressed carbon fiber plate includes a beam body, wherein a fixed end and a tensioning end are respectively provided on the lower surface of the beam body, and a carbon fiber plate body is provided between the fixed end and the tensioning end;

[0007] The fixed end includes a first fixed frame fixedly installed on the lower surface of the beam, and the tensioning end includes a second fixed frame fixedly installed on the lower surface of the beam. Anchor blocks are slidably connected inside the first fixed frame and the second fixed frame. A wedge groove is provided inside the anchor block. Wedge blocks are provided on both the upper and lower sides of the inner wall of the wedge groove. The carbon fiber plate body is disposed between the two wedge blocks.

[0008] A tensioning assembly is provided on one side of the second fixed frame to drive the anchor block to move, thereby tightening the carbon fiber plate body.

[0009] Furthermore, the tensioning assembly includes a jack, and two symmetrical screws are threadedly connected to one side of the anchor block inside the second fixed frame. One end of each screw passes through the second fixed frame and is fixedly installed with a stop block. The jack is positioned between the stop block and the second fixed frame.

[0010] Furthermore, both the first and second fixed frames are composed of straight sections on both sides and a U-shaped section in the middle. The straight sections are provided with bolt holes, and anchor bolts are installed in the bolt holes. The first and second fixed frames are fixedly connected to the beam body by anchor bolts.

[0011] Furthermore, the lower surface of the U-shaped part is provided with a through hole, the width of which is smaller than that of the U-shaped part. The anchor block is slidably connected to the U-shaped part through the gap between the through hole and the edge of the U-shaped part. The bottom end of the anchor block is provided with a relief groove. The lower surface of the anchor block is provided with a fixing bolt. The wedge block is fixedly connected to the anchor block by the fixing bolt. Two symmetrical limiting blocks are fixedly installed inside the first fixing frame.

[0012] Furthermore, the output end of the jack is connected to the second fixed frame, and a clamp is fixedly installed between the cylinder of the jack and the screw. Two pairs of nuts are threaded onto the screw, and the nuts are respectively located on one side of the second fixed frame and the stop block.

[0013] Furthermore, a positioning groove matching the output end of the jack is provided on one side of the second fixed frame.

[0014] Furthermore, carbon fiber plate body and beam body are coated with carbon plate adhesive.

[0015] Furthermore, a pressure plate is provided on the lower surface of the carbon fiber plate body, and the pressure plate is fixedly connected to the beam body by bolts.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. This utility model, by setting up a first fixed frame, a second fixed frame, anchor blocks, and wedge blocks, firstly uses laser equipment to lay out the bottom of the beam, then drills holes at the bottom of the beam, aligns the first and second fixed frames with the drilled hole positions, then inserts anchor bolts into the bolt holes until they enter the drilled holes, and fixes both the first and second fixed frames to the beam. Then, anchor blocks are placed in the first and second fixed frames respectively, and one end of the carbon fiber plate body is pulled into the anchor block in the first fixed frame. Then, wedge blocks are inserted into the wedge grooves, and one end of the carbon fiber plate body is tightly clamped by the two wedge blocks, thereby realizing the application of prestress to the carbon fiber plate body.

[0018] 2. This utility model uses a tensioning assembly to insert a screw rod into the second fixed frame and thread it to the anchor block. Then, a stop block is installed on the screw rod, and nuts are used to restrict the stop block and the screw rod to prevent them from moving. A jack is placed between the stop block and the second fixed frame, and a clamp is used to fix the jack to the screw rod. The output end of the jack extends out and contacts the second fixed frame, and is inserted into the positioning groove for accurate positioning. At this time, carbon plate adhesive is applied to the upper surface of the carbon fiber plate body. Then, the jack is driven step by step at five-minute intervals. Under the reaction force of the jack, the anchor block moves away from the first fixed frame, thereby tightening the carbon fiber plate body.

[0019] 3. This utility model uses a pressure plate and carbon plate adhesive. After tensioning, the jack and stop block are removed, and a pressure plate is installed under the carbon fiber plate body. The pressure plate firmly fixes the carbon fiber plate body to the lower surface of the beam. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the carbon fiber plate body before tensioning of a beam reinforced with prestressed carbon fiber plate according to the present invention.

[0021] Figure 2 This is a schematic diagram of the carbon fiber plate body after tensioning, which is proposed in this utility model for reinforcing beams with prestressed carbon fiber plates;

[0022] Figure 3 This is a schematic diagram of the connection between the pressure plate and the carbon fiber plate in a beam reinforced with prestressed carbon fiber plate according to the present invention.

[0023] Figure 4 This is a schematic diagram of a tensioning assembly for a beam reinforced with prestressed carbon fiber plate, as proposed in this utility model.

[0024] Figure 5 This is a schematic diagram of the connection between the screw and the anchor block in a beam reinforced with prestressed carbon fiber plate according to the present invention.

[0025] Figure 6 This is a cross-sectional schematic diagram of an anchor block for beams reinforced with prestressed carbon fiber plates, as proposed in this utility model.

[0026] Figure 7 This is a schematic diagram of the installation of a wedge-shaped block on the carbon fiber plate body for reinforcing a beam using prestressed carbon fiber plate, as proposed in this utility model.

[0027] Figure 8 This is a schematic diagram of the first fixing frame for a beam reinforced with prestressed carbon fiber plate according to the present invention;

[0028] Figure 9 This is a schematic diagram of the installation of an anchor block on a second fixed frame for a beam reinforced with prestressed carbon fiber plate, as proposed in this utility model.

[0029] Figure 10 This is a schematic diagram of a second fixing frame for a beam reinforced with prestressed carbon fiber plate according to the present invention;

[0030] Figure 11 This is a schematic diagram of a carbon fiber plate adhesive for reinforcing beams using prestressed carbon fiber plates, as proposed in this utility model.

[0031] In the diagram: 1. Beam; 2. Fixed end; 3. Tensioning end; 4. Carbon fiber plate body; 5. First fixed frame; 6. Second fixed frame; 7. Anchor block; 8. Wedge groove; 9. Wedge block; 10. Jack; 11. Screw; 12. Stop block; 13. Straight section; 14. U-shaped section; 15. Bolt hole; 16. Anchor bolt; 17. Through hole; 18. Clearance groove; 19. Fixing bolt; 20. Limiting block; 21. Clamp; 22. Nut; 23. Positioning groove; 24. Carbon fiber plate adhesive; 25. Pressure plate. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0033] Reference Figure 1-7 A beam reinforced with prestressed carbon fiber plate includes a beam body 1, wherein a fixed end 2 and a tensioning end 3 are respectively provided on the lower surface of the beam body 1, and a carbon fiber plate body 4 is provided between the fixed end 2 and the tensioning end 3.

[0034] The fixed end 2 includes a first fixed frame 5 fixedly installed on the lower surface of the beam 1, and the tensioning end 3 includes a second fixed frame 6 fixedly installed on the lower surface of the beam 1. Anchor blocks 7 are slidably connected inside the first fixed frame 5 and the second fixed frame 6. A wedge groove 8 is provided inside the anchor block 7. Wedge blocks 9 are provided on both the upper and lower sides of the inner wall of the wedge groove 8. The carbon fiber plate body 4 is disposed between the two wedge blocks 9.

[0035] A tensioning assembly is provided on one side of the second fixed frame 6 to drive the anchor block 7 to move, thereby tightening the carbon fiber plate body 4;

[0036] First, a laser device is used to lay out the bottom of the beam 1. Then, holes are drilled at the bottom of the beam 1. The first fixing frame 5 and the second fixing frame 6 are aligned with the drilling positions. Next, the anchor bolt 16 is inserted into the bolt hole 15 until it enters the drill hole. The first fixing frame 5 and the second fixing frame 6 are fixed to the beam 1. Then, the anchor block 7 is placed in the first fixing frame 5 and the second fixing frame 6 respectively. One end of the carbon fiber plate body 4 is pulled into the anchor block 7 in the first fixing frame 5. Then, the wedge block 9 is inserted into the wedge groove 8. One end of the carbon fiber plate body 4 is tightly clamped by the two wedge blocks 9, thereby realizing the application of prestress to the carbon fiber plate body 4.

[0037] Reference Figure 4-5 Specifically: the tensioning assembly includes a jack 10, and two symmetrical screws 11 are threadedly connected to one side of the anchor block 7 inside the second fixed frame 6. One end of the screw 11 passes through the second fixed frame 6 and is fixedly installed with a stop block 12. The jack 10 is set between the stop block 12 and the second fixed frame 6. The screw 11 is inserted into the second fixed frame 6 and threadedly connected to the anchor block 7. Then the stop block 12 is installed on the screw 11.

[0038] Reference Figure 2-4 , Figure 8 Specifically: the first fixing frame 5 and the second fixing frame 6 are both composed of straight sections 13 on both sides and a U-shaped section 14 in the middle. The straight sections 13 are provided with bolt holes 15, and anchor bolts 16 are provided in the bolt holes 15. The first fixing frame 5 and the second fixing frame 6 are fixedly connected to the beam 1 through the anchor bolts 16.

[0039] Reference Figure 8-10 Specifically: the lower surface of the U-shaped part 14 is provided with a through hole 17, the width of the through hole 17 is smaller than that of the U-shaped part 14, the anchor block 7 is slidably connected to the U-shaped part 14 through the gap between the through hole 17 and the edge of the U-shaped part 14, the bottom end of the anchor block 7 is provided with an avoidance groove 18, the lower surface of the anchor block 7 is provided with a fixing bolt 19, the wedge block 9 is fixedly connected to the anchor block 7 by the fixing bolt 19, and two symmetrical limiting blocks 20 are fixedly installed inside the first fixing frame 5. The wedge block 9 and the anchor block 7 are fixed with the fixing bolt 19. The anchor block 7 inside the first fixing frame 5 will not move under the tension of the tensioning component due to the limitation of the limiting blocks 20.

[0040] Reference Figure 4 Specifically: the output end of the jack 10 is connected to the second fixed frame 6, a clamp 21 is fixedly installed between the cylinder of the jack 10 and the screw 11, and two pairs of nuts 22 are threadedly connected to the screw 11. The nuts 22 are respectively set on one side of the second fixed frame 6 and the stop block 12.

[0041] Nut 22 is used to restrict the stop block 12 and screw 11 respectively to prevent them from moving. The jack 10 is placed between the stop block 12 and the second fixed frame 6. The jack 10 is fixed to the screw 11 using clamp 21. The output end of the jack 10 extends out and contacts the second fixed frame 6. At this time, carbon plate adhesive 24 is applied to the upper surface of the carbon fiber plate body 4. Then the jack 10 is driven step by step with a driving interval of five minutes. The anchor block 7 moves away from the first fixed frame 5 under the reaction force of the jack 10, thereby tightening the carbon fiber plate body 4. After each tightening of the carbon fiber plate body 4 by the jack 10, the nut 22 on one side of the second fixed frame 6 is tightened again. After the tensioning is completed, the jack 10 and the stop block 12 are removed.

[0042] Reference Figure 10 Specifically: The second fixed frame 6 has a positioning groove 23 on one side that matches the output end of the jack 10. The output end of the jack 10 is inserted into the positioning groove 23 for accurate positioning.

[0043] Reference Figure 11 Specifically: carbon fiber plate body 4 and beam body 1 are coated with carbon plate adhesive 24.

[0044] Reference Figure 2-3 Specifically: A pressure plate 25 is provided on the lower surface of the carbon fiber plate body 4. The pressure plate 25 is fixedly connected to the beam body 1 by bolts. The pressure plate 25 is installed below the carbon fiber plate body 4, and the pressure plate 25 firmly fixes the carbon fiber plate body 4 to the lower surface of the beam body 1. The whole reinforcement process is simple to operate, the required materials are easy to obtain, and the reinforcement effect is significant, which has high practical value.

[0045] Working principle: First, the bottom of the beam 1 is marked with a laser device. Then, holes are drilled at the bottom of the beam 1. The first fixing frame 5 and the second fixing frame 6 are aligned with the drilling positions. Next, the anchor bolt 16 is inserted into the bolt hole 15 until it enters the drill hole. The first fixing frame 5 and the second fixing frame 6 are fixed to the beam 1. Then, the anchor block 7 is placed in the first fixing frame 5 and the second fixing frame 6 respectively. One end of the carbon fiber plate body 4 is pulled into the anchor block 7 in the first fixing frame 5. Then, the wedge block 9 is inserted into the wedge groove 8. One end of the carbon fiber plate body 4 is tightly clamped by the two wedge blocks 9, thereby realizing the application of prestress to the carbon fiber plate body 4. Then, the wedge block 9 and the anchor block 7 are fixed with the fixing bolt 19. The anchor block 7 in the first fixing frame 5 will not move under the tension of the tensioning component due to the limitation of the limiting block 20.

[0046] Next, the tensioning assembly is installed. First, the screw 11 is inserted into the second fixed frame 6 and threadedly connected to the anchor block 7. Then, the stop block 12 is installed on the screw 11, and the stop block 12 and the screw 11 are respectively restricted by the nut 22 to prevent them from moving. The jack 10 is placed between the stop block 12 and the second fixed frame 6, and the jack 10 is fixed to the screw 11 using the clamp 21. The output end of the jack 10 extends out and contacts the second fixed frame 6, and is inserted into the positioning groove 23 for accurate positioning. At this time, carbon plate adhesive 24 is applied to the upper surface of the carbon fiber plate body 4, and then the jack is driven step by step. Jack 10, with a driving interval of five minutes, moves the anchor block 7 away from the first fixed frame 5 under the reaction force of jack 10, thereby tightening the carbon fiber plate body 4. After each tightening of the carbon fiber plate body 4, jack 10 tightens the nut 22 on one side of the second fixed frame 6 again. After tensioning is completed, jack 10 and stop block 12 are removed, and pressure plate 25 is installed under the carbon fiber plate body 4. Pressure plate 25 firmly fixes the carbon fiber plate body 4 to the lower surface of beam 1. The entire reinforcement process is simple to operate, the required materials are easy to obtain, and the reinforcement effect is significant, with high practical value.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0048] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

Claims

1. A beam reinforced with prestressed carbon fiber plate, characterized in that, Includes a beam body (1), the lower surface of the beam body (1) is respectively provided with a fixed end (2) and a tensioning end (3), and a carbon fiber plate body (4) is provided between the fixed end (2) and the tensioning end (3). The fixed end (2) includes a first fixed frame (5) fixedly installed on the lower surface of the beam (1), and the tensioning end (3) includes a second fixed frame (6) fixedly installed on the lower surface of the beam (1). Anchor blocks (7) are slidably connected inside the first fixed frame (5) and the second fixed frame (6). A wedge groove (8) is provided inside the anchor block (7). Wedge blocks (9) are provided on both the upper and lower sides of the inner wall of the wedge groove (8). The carbon fiber plate body (4) is located between the two wedge blocks (9). The second fixed frame (6) is provided with a tensioning component on one side to drive the anchor block (7) to move, thereby tightening the carbon fiber plate body (4); The tensioning assembly includes a jack (10), and two symmetrical screws (11) are threadedly connected to one side of the anchor block (7) inside the second fixed frame (6). One end of the screw (11) passes through the second fixed frame (6) and is fixedly installed with a stop block (12). The jack (10) is located between the stop block (12) and the second fixed frame (6). The first fixed frame (5) and the second fixed frame (6) are both composed of straight sections (13) on both sides and a U-shaped section (14) in the middle. The straight sections (13) are provided with bolt holes (15), and the bolt holes (15) are provided with anchor bolts (16). The first fixed frame (5) and the second fixed frame (6) are fixedly connected to the beam (1) through anchor bolts (16). The lower surface of the U-shaped part (14) is provided with a through hole (17), the width of the through hole (17) is smaller than that of the U-shaped part (14), the anchor block (7) is slidably connected to the U-shaped part (14) through the gap between the through hole (17) and the edge of the U-shaped part (14), the bottom end of the anchor block (7) is provided with a relief groove (18), the lower surface of the anchor block (7) is provided with a fixing bolt (19), the wedge block (9) is fixedly connected to the anchor block (7) through the fixing bolt (19), and two symmetrical limiting blocks (20) are fixedly installed inside the first fixing frame (5).

2. A beam reinforced with prestressed carbon fiber plate according to claim 1, characterized in that, The output end of the jack (10) is connected to the second fixed frame (6). A clamp (21) is fixedly installed between the cylinder of the jack (10) and the screw (11). Two pairs of nuts (22) are threaded on the screw (11). The nuts (22) are respectively set on one side of the second fixed frame (6) and the stop block (12).

3. A beam reinforced with prestressed carbon fiber plate according to claim 1, characterized in that, The second fixed frame (6) has a positioning groove (23) on one side that matches the output end of the jack (10).

4. A beam reinforced with prestressed carbon fiber plate according to claim 1, characterized in that, Carbon fiber plate body (4) and beam body (1) are coated with carbon plate adhesive (24).

5. A beam reinforced with prestressed carbon fiber plate according to claim 1, characterized in that, A pressure plate (25) is provided on the lower surface of the carbon fiber plate body (4), and the pressure plate (25) is fixedly connected to the beam body (1) by bolts.

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