Beam column reinforcing sleeve

Abstract

The application relates to the technical field of beam-column reinforcement, and discloses a beam-column reinforcement sleeve, which comprises a column fixing structure and a beam fixing structure, the column fixing structure comprises two first reinforcement sleeves, each first reinforcement sleeve is in a U-shaped structure, two fixing strips are fixed on each first reinforcement sleeve, a clamping groove is formed in each fixing strip, the two first reinforcement sleeves are connected through two locking structures, and the two locking structures are used for fixing the two first reinforcement sleeves on a column; and the beam fixing structure comprises two second reinforcement sleeves, each second reinforcement sleeve is in a U-shaped structure. In the application, the column fixing structure is designed in a double-first-reinforcement-sleeve split type, the two sides of a tensioning frame are driven to synchronously displace through a tensioning screw rod in the locking structure, mechanical self-locking is realized through two reverse threads, the two first reinforcement sleeves symmetrically clamp the column body, the generated pressing force increases the normal pressure of a contact surface, and sliding failure is effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of beam and column reinforcement technology, and in particular to beam and column reinforcement sleeves. Background Technology

[0002] Steel-clad beam-column reinforcement structure is a building structure reinforcement technology that involves wrapping steel sections around concrete beams and columns and using methods such as transverse bracing, hoops, or welding to tightly connect the steel to the original structure, forming an integral reinforced frame. Its core principle is to replace or share some of the stress of the original structure by using external steel, thereby improving the load-bearing capacity, stiffness, and ductility of the components, while inhibiting crack development and deformation.

[0003] In existing technologies, beam-column reinforcement typically utilizes two U-shaped steel sleeves, which are fitted onto the column to form a single integrated sleeve structure. These sleeves are then welded together to reinforce the column. Beam reinforcement follows a similar process. However, while this structure enhances the beam-column structure, the steel sleeves can only limit the lateral deformation of the beam-column through their own stiffness. Unlike prestressed reinforcement systems, they cannot actively apply positive pressure to improve the structural stress state. This passive support mode results in a lack of effective stress transfer between the steel sleeve and the concrete interface. Under load, it cannot actively compress the concrete core to offset some tensile stress, nor can it improve the crack resistance and ductility of the concrete through prestressing. Furthermore, the gap risk between the welded sleeve structure and the beam-column makes it difficult for the reinforced layer and the original structure to form a shared load-bearing system. Under complex loads, interface peeling failure is likely to occur, ultimately limiting the overall improvement in reinforcement effectiveness and long-term reliability.

[0004] Therefore, it is necessary to design beam and column reinforcement sleeves to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a beam and column reinforcement sleeve.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The beam-column reinforcement sleeve includes a column fixing structure and a beam fixing structure. The column fixing structure includes two first reinforcement sleeves, each of which is U-shaped. Each first reinforcement sleeve is fixed with two fixing strips, and each fixing strip has a slot. The two first reinforcement sleeves are connected by two locking structures for fixing the two first reinforcement sleeves to the column. The beam fixing structure includes two second reinforcement sleeves, each of which is U-shaped.

[0008] As a preferred embodiment of the present invention, each of the locking structures includes a mounting frame, and both sides of the mounting frame are provided with sliding grooves. A tensioning bracket is slidably disposed in each sliding groove. The end of each tensioning bracket is U-shaped and extends to the outside of the corresponding sliding groove. Two side plates are fixed on each tensioning bracket. The four side plates are arranged in pairs facing each other. A tensioning screw is threadedly connected to two of the side plates. A guide rod is slidably disposed on the other two side plates. The tensioning screw is provided with two threaded segments of the same length and opposite thread directions.

[0009] As a preferred embodiment of the present invention, the U-shaped structure at the end of the tensioning bracket is adapted to the shape of the slot.

[0010] As a preferred embodiment of the present invention, both the mounting frame and the tensioning bracket are made of metal.

[0011] As a preferred embodiment of the present invention, two prestressed reinforcement structures are provided on the two second reinforcement sleeves, and a clamping structure is provided on both mounting frames, with the two prestressed reinforcement structures acting on the two clamping structures respectively.

[0012] As a preferred embodiment of the present invention, the clamping structure includes a fixing frame and a pressure plate. The fixing frame is fixed to the side of the mounting frame and has a slide rail. The pressure plate is slidably disposed on the mounting frame and is positioned opposite the gap between the two first reinforcing sleeves. A protrusion is fixed to the side of the pressure plate. A movable block is slidably disposed in the slide rail. The movable block has an inclined surface, which is positioned opposite the protrusion. The side of the movable block away from the protrusion extends to the outside of the slide rail and is fixed with a hook rod.

[0013] As a preferred embodiment of the present invention, the prestressed reinforcement structure includes two anchors, which are respectively fixed on two second reinforcement sleeves. Each anchor has a screw hole, and a lead screw is threaded into each of the two screw holes. A rotatable rotating block is provided at one end of each lead screw that is close to the other, and the two rotating blocks are connected by a steel cable.

[0014] As a preferred embodiment of the present invention, a limit strip is fixed on the top surface of the pressure plate.

[0015] As a preferred embodiment of the present invention, the end of the protrusion facing the push plate is rounded.

[0016] As a preferred embodiment of the present invention, the side of the pressure plate is fitted with the inner surface of the mounting frame.

[0017] The present invention has the following beneficial effects:

[0018] 1. In this invention, the column fixing structure adopts a split design with double first reinforcing sleeves. The tension screw in the locking structure drives the tensioning frames on both sides to move synchronously. The mechanical self-locking is achieved by using two reverse threads. This design makes the two first reinforcing sleeves form a symmetrical clamp on the column. The resulting clamping force not only increases the normal pressure on the contact surface and effectively prevents sliding failure, but also reduces local stress concentration through the uniformly distributed constraint force. Combined with the lateral pre-compression of the column core area by the pressure plate in the clamping structure, the concrete is in a triaxial compression state, which significantly inhibits crack propagation.

[0019] 2. In this invention, the prestressed reinforcement structure uses a transmission chain of steel cables, hooks, and movable blocks to convert the axial tension of the steel cables into an upward lifting force on the nodes. This force system is in opposite balance to the bending rectangle generated by the gravity load. The suspension system formed after the steel cables are tightened transforms the beam-column connection from a hinged or semi-rigid connection to an approximately rigid connection. This prestressed active intervention mechanism is more effective in resisting the inertial forces caused by dynamic loads such as earthquakes compared to traditional passive reinforcement methods. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the beam-column reinforcement sleeve proposed in this invention;

[0021] Figure 2 This is a schematic diagram of the planar structure of the beam-column reinforcement sleeve proposed in this invention;

[0022] Figure 3 A structural diagram of a column-fixed structure;

[0023] Figure 4 A cross-sectional structural diagram of a column-fixed structure;

[0024] Figure 5 This is a schematic diagram of the structure of the two first reinforcing sleeves;

[0025] Figure 6 This is a schematic diagram of the locking structure;

[0026] Figure 7 for Figure 3 Enlarged view of the structure at point A;

[0027] Figure 8 for Figure 4 Enlarged view of the structure at point B.

[0028] In the diagram: 1. First reinforcing sleeve; 11. Fixing strip; 111. Slot; 2. Second reinforcing sleeve; 21. Mounting frame; 22. Tensioning bracket; 221. Side plate; 23. Tensioning screw; 24. Guide rod; 31. Fixing bracket; 311. Slide rail; 32. Pressure plate; 321. Limiting strip; 322. Protrusion; 33. Movable block; 34. Push plate; 35. Hook rod; 41. Anchor; 42. Screw rod; 43. Rotating block; 44. Steel cable. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Example 1: The beam-column reinforcement sleeve disclosed in this example is shown below. Figures 1-8 It includes a column fixing structure and a beam fixing structure. The column fixing structure includes two first reinforcing sleeves 1. Each first reinforcing sleeve 1 has a U-shaped structure. Each first reinforcing sleeve 1 has two fixing strips 11 fixed on it. Each fixing strip 11 has a slot 111. When the two first reinforcing sleeves 1 are fitted on the column, there is a gap between the two first reinforcing sleeves 1. The two first reinforcing sleeves 1 are connected by two locking structures. The two locking structures are used to fix the two first reinforcing sleeves 1 on the column.

[0031] Each locking structure includes a mounting frame 21, with grooves on both sides. A tensioning bracket 22 is slidably mounted in each groove. The end of each tensioning bracket 22 is U-shaped and extends to the outside of the corresponding groove. The U-shaped structure of the tensioning bracket 22's end is adapted to the slot 111 on the fixing strip 11. When the end of the tensioning bracket 22 is engaged in the slot 111, the side of the tensioning bracket 22 fits against the groove wall of the slot 111. This design is to ensure that the two tensioning brackets are properly aligned. The locking effect of the frame 22 on the two fixing bars 11 is achieved by fixing two side plates 221 on each tensioning frame 22. The four side plates 221 are arranged in pairs facing each other. Two of the side plates 221 are threaded with a tensioning screw 23. The other two side plates 221 are slidably provided with a guide rod 24. The tensioning screw 23 is provided with two threaded sections of the same length and opposite thread direction. The two side plates 221 are threaded onto the two threaded sections of the tensioning screw 23 respectively.

[0032] The beam fixing structure includes two second reinforcing sleeves 2, each of which is U-shaped and has several threaded holes. Workers can use bolts to fix the second reinforcing sleeves 2 to the beam.

[0033] The implementation principle of this embodiment is as follows: When installing the two first reinforcing sleeves 1, the worker first places the two first reinforcing sleeves 1 on the column, so that the two first reinforcing sleeves 1 are facing each other. Then, the worker uses two locking structures to fix the two first reinforcing sleeves 1 on the column. For the locking structure, the worker first adjusts the position of the two tensioning brackets 22 by rotating the tension screw 23. During adjustment, the worker uses a wrench to rotate the tension screw 23. The tension screw 23 is provided with two threaded sections of the same length and opposite direction. Under the guidance of the guide rod 24, when the tension screw 23 rotates, it can drive the corresponding two side plates 221 to move closer or further away from each other, thereby causing the two tensioning brackets 22 to move closer or further away from each other, thus adjusting the position of the two tensioning brackets 22 until the ends of the two tensioning brackets 22 can be respectively inserted into the two slots 111. Further, the worker will... The ends of the tensioning brackets 22 are aligned with the two slots 111 respectively, and the mounting frame 21 is controlled to move upward, so that the two tensioning brackets 22 are respectively inserted into the two slots 111. Then, the operator uses a wrench to turn the tensioning screw 23, so that the two tensioning brackets 22 continue to move closer to each other. At this time, the two tensioning brackets 22 can apply tension to the two fixing strips 11, so that the two first reinforcing sleeves 1 move closer to each other. Under these circumstances, the two first reinforcing sleeves 1 can apply a clamping force to the column. This clamping force increases the normal pressure between the first reinforcing sleeve 1 and the column, thereby effectively preventing relative sliding between the first reinforcing sleeve 1 and the column. At the same time, the clamping force can also make the contact between the first reinforcing sleeve 1 and the column tighter, reduce the gap between the two, make the force transmission more uniform and effective, and further enhance the connection stability between the first reinforcing sleeve 1 and the column. Therefore, it can improve the connection strength between the two first reinforcing sleeves 1 and the column.

[0034] Example 2: Based on Example 1, this example discloses a beam-column reinforcement sleeve, such as... Figure 1 As shown, two prestressed reinforcement structures are provided on the two second reinforcement sleeves 2, and clamping structures are provided on the two mounting frames 21. The two prestressed reinforcement structures act on the two clamping structures respectively.

[0035] The clamping structure includes a fixing frame 31 and a pressure plate 32. The fixing frame 31 has a U-shaped structure and is fixed to the side of the mounting frame 21. A slide rail 311 is provided on the fixing frame 31. The pressure plate 32 is slidably mounted on the mounting frame 21. The pressure plate 32 is positioned directly opposite the gap between the two first reinforcing sleeves 1. A limit strip 321 is fixed to the top surface of the pressure plate 32 to prevent the pressure plate 32 from falling off the mounting frame 21. A protruding part is fixed to the side of the pressure plate 32. A movable block 33 is slidably disposed in the slide rail 311. The side of the movable block 33 is in contact with the inner surface of the slide rail 311, which can ensure the stability of the sliding block in the slide rail 311 and prevent the movable block 33 from shaking. The movable block 33 is provided with an inclined surface, which is set directly opposite the protrusion 322. The side of the movable block 33 away from the protrusion 322 extends to the outside of the slide rail 311 and is fixed with a hook rod 35. The top of the hook rod 35 has a hook-shaped structure.

[0036] The prestressed reinforcement structure includes two anchors 41, which are fixed on two second reinforcement sleeves 2 respectively. Each anchor 41 has a screw hole, and a screw rod 42 is threaded into each screw hole. A rotatable rotating block 43 is provided at the end of the two screw rods 42 that is close to each other. The two rotating blocks 43 are connected by a steel cable 44.

[0037] The implementation principle of this embodiment is as follows: Figure 1 and Figure 2 As shown, after fixing the two first reinforcing sleeves 1 and the two second reinforcing sleeves 2, the worker pulls down the middle of the steel cable 44 and places the steel cable 44 on the corresponding hook of the hook rod 35. Then, the worker rotates the two lead screws 42, causing them to move away from each other. When the two lead screws 42 move away from each other, the two rotating blocks 43 also move away from each other, which makes the steel cable 44 taut and straight. During this process, the steel cable 44 can drive the hook rod 35 to move upward. When the hook rod 35 moves upward, it can drive the movable block 33 to move upward, and the push plate 34 also moves accordingly. During the movement of the push plate 34, its inclined surface can squeeze the protrusion 322. When the protrusion 322 is squeezed by the inclined surface, it can drive the pressure plate 32 to move, so that the pressure plate 32 only presses the column. Finally, the two pressure plates 32 tightly press the column, and at the same time, the two steel cables 44 are taut, forming a... Figure 1In the state shown, the two pressure plates 32 can reinforce the column at the position of the distance between the two first reinforcing sleeves 1. At the same time, the upward tension applied by the steel cable 44 to the hook rod 35 can enhance the connection strength between the beam and the column. In summary, the lateral pressure from the two pressure plates 32 can significantly improve the compressive strength and crack resistance of the concrete, especially effectively inhibiting the development of longitudinal cracks in the core area concrete under load. At the same time, the pre-stress offsets part of the tensile stress, delaying the accumulation of structural damage. Secondly, the taut steel cable 44 forms a suspension structure at the beam-column joint. Its axial tension is converted into an upward lifting force on the beam-column connection joint through the hook rod 35. This force system is in opposite balance with the bending rectangle formed by the gravity load, significantly reducing the shear stress and peak bending moment at the joint. From the perspective of structural mechanics, the pretension of the steel cable 44 is equivalent to applying a reverse load at the joint, transforming the beam-column connection from a hinged or semi-rigid connection to a rigid connection, greatly improving the anti-rotation capacity and overall stiffness of the joint, which is especially suitable for structural reinforcement under dynamic loads such as earthquakes or wind loads.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A beam-column reinforcement sleeve, characterized in that, The system includes a column fixing structure and a beam fixing structure. The column fixing structure includes two first reinforcing sleeves (1), each of which is U-shaped. Each first reinforcing sleeve (1) is fixed with two fixing strips (11), and each fixing strip (11) is provided with a slot (111). The two first reinforcing sleeves (1) are connected by two locking structures. The two locking structures are used to fix the two first reinforcing sleeves (1) to the column. The beam fixing structure includes two second reinforcing sleeves (2), each of which is U-shaped. Each locking structure includes a mounting frame (21). Two prestressed reinforcement structures are provided on the two second reinforcement sleeves (2), and clamping structures are provided on the two mounting frames (21). The two prestressed reinforcement structures act on the two clamping structures respectively. The clamping structure includes a fixing frame (31) and a pressure plate (32). The fixing frame (31) is fixed to the side of the mounting frame (21). A slide rail (311) is provided on the fixing frame (31). The pressure plate (32) is slidably disposed on the mounting frame (21). The pressure plate (32) is positioned opposite the gap between the two first reinforcing sleeves (1). A protrusion (322) is fixed on the side of the pressure plate (32). A movable block (33) is slidably disposed in the slide rail (311). An inclined surface is provided on the movable block (33), and the inclined surface is positioned opposite the protrusion (322). The side of the movable block (33) away from the protrusion (322) extends to the outside of the slide rail (311) and is fixed with a hook rod (35). The prestressed reinforcement structure includes two anchors (41), which are respectively fixed on two second reinforcement sleeves (2). Each anchor (41) has a screw hole, and a screw rod (42) is threaded into each of the two screw holes. A rotatable rotating block (43) is provided at one end of each screw rod (42) that is close to each other. The two rotating blocks (43) are connected to each other by a steel cable (44).

2. The beam-column reinforcement sleeve according to claim 1, characterized in that, The mounting frame (21) has sliding grooves on both sides, and a tensioning bracket (22) is slidably arranged in each sliding groove. The end of each tensioning bracket (22) is U-shaped and extends to the outside of the corresponding sliding groove. Two side plates (221) are fixed on each tensioning bracket (22). The four side plates (221) are arranged in pairs facing each other. Two of the side plates (221) are threaded together with a tensioning screw (23). The other two side plates (221) are slidably arranged with a guide rod (24). The tensioning screw (23) is provided with two threaded sections of the same length and opposite thread directions.

3. The beam-column reinforcement sleeve according to claim 2, characterized in that, The U-shaped structure at the end of the tensioning bracket (22) is adapted to the shape of the slot (111).

4. The beam-column reinforcement sleeve according to claim 2, characterized in that, Both the mounting frame (21) and the tensioning bracket (22) are made of metal.

5. The beam-column reinforcement sleeve according to claim 4, characterized in that, Limiting strips (321) are fixed to the top surface of the pressure plate (32).

6. The beam-column reinforcement sleeve according to claim 5, characterized in that, The protrusion (322) is rounded at one end facing the push plate (34).

7. The beam-column reinforcement sleeve according to claim 1, characterized in that, The side of the pressure plate (32) is in contact with the inner surface of the mounting frame (21).

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