Concrete beam reinforcing device based on prestressed cross cable structure
By reinforcing concrete beams with prestressed cross-cable structures, the problems of complex construction and high cost of existing external prestressing reinforcement methods are solved, achieving efficient reinforcement and stability improvement of concrete beams, simplifying construction and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CCCC FOURTH HIGHWAY ENG CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-05-19
AI Technical Summary
Existing external prestressing reinforcement methods are complex to construct, costly, and difficult to maintain and inspect, which limits the flexibility of structural design.
The prestressed cross-cable structure is adopted, which combines cross cables, down cables and V-shaped struts, along with U-shaped sleeves and anchors, and applies prestress using specialized tensioning equipment. The down cables are pre-embedded in the concrete columns to transfer the prestress and enhance the stiffness and load-bearing capacity of the concrete beam.
It improves the overall stiffness and stability of concrete beams, simplifies the construction process, reduces costs, facilitates disassembly and reuse, and enhances the redundancy and stability of the structure.
Smart Images
Figure CN224259964U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concrete beam reinforcement technology, specifically a prestressed cross cable structure for reinforcing concrete beams. Background Technology
[0002] The assessment, reinforcement, repair, and renovation of existing building structures are issues of widespread international concern. Traditional reinforcement methods, such as increasing cross-sections, bonding steel plates, bonding fiber composite materials, external steel cladding, and rebar installation, all increase the load-bearing capacity of reinforced concrete components. These are permanent reinforcement methods requiring on-site work and curing time. With the accelerating pace of urban renewal, the breadth and depth of reinforcement and renovation are constantly changing, and reinforcement methods are also becoming increasingly diverse. The continuous emergence of new technologies, materials, processes, and equipment provides new technical support for environmentally friendly and green reinforcement solutions, making reinforcement increasingly geared towards energy conservation and emission reduction, such as methods like adding substructures, adding prestress, and external prestressing.
[0003] In existing technologies, external prestressing reinforcement typically requires specialized equipment and materials, which can lead to higher construction costs and a more complex construction process. Precise construction planning and techniques are necessary to ensure effective prestress transfer and anchoring. Prestressing reinforcement may limit the design flexibility of the original structure, requiring consideration of the prestressing introduction method and direction. After external prestressing reinforcement, because the prestressing elements are usually invisible, maintenance and inspection of the structure may be more difficult, requiring specialized testing methods. Summary of the Invention
[0004] The technical problem to be solved by this utility model is to provide a device for reinforcing concrete beams with a prestressed cross cable structure to enhance the overall stiffness and load-bearing capacity of concrete beams and improve the stability of concrete beams under uneven loads.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] A concrete beam reinforcement device based on a prestressed cross-cable structure is disclosed for reinforcing concrete beams. The device includes a cross-cable structure and U-shaped sleeves, with the U-shaped sleeves fixed to the concrete beams at intervals. The cross-cable structure includes cross cables, pull cables, and V-shaped struts. The pull cables are anchored at both ends to the lower sides of both ends of the concrete beam. The V-shaped struts are arranged in parallel and fixed between the U-shaped sleeves and the pull cables. A pair of cross cables are arranged between two adjacent V-shaped struts. The lower end of the cross cable is connected to the connection point between the V-shaped strut and the pull cable, and the upper end of the cross cable is connected to the V-shaped strut.
[0007] The concrete beam reinforcement device also includes anchorages, which are installed at both ends of the cross cable structure to fix the pull-down cables and transmit prestress; the pull-down cables are embedded in the concrete column and prestress is applied to the cross cable structure by tensioning cables.
[0008] A prestressed clamp is provided on the pull cable, and the lower ends of the cross cable and V-shaped strut are connected to the prestressed clamp.
[0009] The prestressed clamping plate is hinged to the V-shaped strut.
[0010] The prestressed clamping plate includes two steel plates, upper and lower, which can be used to insert and clamp the pull-down cable, and one of the steel plates is provided with a lug for connecting the cross cable.
[0011] The lower end of the cross cable is hinged to the ear plate via a pin.
[0012] The prestressed clamp also includes a low-friction pad and a high-friction pad. The upper part of the prestressed clamp is fastened to the upper surface of the lower cable by the low-friction pad; the lower part of the prestressed clamp is fastened to the lower surface of the lower cable by the high-friction pad.
[0013] The cross cable structure also includes side cables, the lower ends of which are connected to the connection point between the outermost V-shaped strut and the pull cable, and the lower ends of which are connected to the concrete beam.
[0014] A connecting plate is welded to the lower end of the U-shaped sleeve; the cross cable and V-shaped strut are connected to the connecting plate.
[0015] The U-shaped sleeve is attached to the concrete beam by a structural adhesive layer.
[0016] This utility model has the following beneficial effects:
[0017] 1) By setting up a cross cable structure, the overall stiffness and load-bearing capacity of the concrete beam are effectively enhanced, and the stability of the concrete beam under uneven load is improved.
[0018] 2) Based on the traditional tensioned cable structure, cross cables are constructed between the struts to further improve the structural redundancy and stability.
[0019] 3) The concrete beam is connected to the cross cable structure at the lower end by a U-shaped sleeve, which realizes a quick connection, is easy to disassemble, and can be reused. This avoids the traditional pre-embedded part connection and saves construction costs.
[0020] 4) Apply the predetermined prestress to the steel cable using a special tensioning device. After tensioning, install anchors at both ends of the cross cable structure. The lower cable is embedded in the concrete column to fix the steel cable and transfer the prestress. The prestress is transferred to the concrete beam through the anchoring system to enhance its load-bearing capacity. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the concrete beam reinforcement device of this utility model;
[0022] Figure 2 This is a front view of the cross cable structure;
[0023] Figure 3 This is a schematic diagram of a U-shaped sleeve structure;
[0024] Figure 4 This is a front view of a prestressed steel slab;
[0025] Figure 5 This is a top view of a prestressed steel slab;
[0026] Figure 6 This is a comparison chart of finite element analysis of displacement of a traditional tensioned cable structure and a prestressed cross-cable structure reinforced concrete beam under full span load.
[0027] In the diagram, 1. Concrete beam, 2. Cross-cable structure, 3. U-shaped sleeve, 21. Cross cable, 22. Side cable, 23. Down cable, 24. Connecting plate, 25. Prestressed clamp, 26. V-shaped strut, 31. High-strength pin, 32. Structural adhesive layer, 41. Outward connecting section, 42. Cable sleeve, 43. Anchor plate, 44. Concrete column, 51. Ear plate, 52. Stiffening plate, 53. High-strength bolt, 54. V-shaped strut connection, 55. Low friction resistance cushion layer, 56. High friction resistance cushion layer. Detailed Implementation
[0028] The present invention will be further described below with reference to the accompanying drawings:
[0029] See Figure 1 A concrete beam reinforcement device based on a prestressed cross-cable structure is disclosed for reinforcing a concrete beam 1. The concrete beam reinforcement device includes a cross-cable structure 2 and a U-shaped sleeve 3. The U-shaped sleeve 3 has a bottom and two sides. The U-shaped sleeve 3 is fitted onto the concrete beam 1, and the bottom and sides of the U-shaped sleeve 3 are respectively fixed to the sides of the bottom surface of the concrete beam 1. The cross-cable structure 2 is connected to the concrete beam 1 via the U-shaped sleeve 3.
[0030] In this embodiment, see Figure 1 and Figure 2The cross-cable structure 2 includes cross cables 21, side cables 22, pull cables 23, connecting plates 24, prestressed clamps 25, and V-shaped struts 26. The pull cables 23 are anchored at both ends to the lower sides of the concrete beam 1. The V-shaped struts 26 are arranged parallel to each other and fixed between the U-shaped sleeve 3 and the pull cables 23. A pair of cross cables 21 are arranged between adjacent V-shaped struts 26. Side cables 22 are arranged at the outermost ends. The lower ends of the cross cables 21 and side cables 22 are connected to the connection points of the V-shaped struts 26 and the pull cables 23, and the upper ends of the cross cables 21 and side cables 22 are connected to the connecting plates 24 of the U-shaped sleeve 3. The connecting plates 24 are welded to the bottom of the U-shaped sleeve 3.
[0031] The concrete beam reinforcement device also includes anchorages, which include cable sleeves 42 and anchor plates 43. The cable sleeves 42 are embedded in the concrete column 44. The extended connecting section 41 of the lower cable 23 passes through the cable sleeves 42 and is anchored and prestressed through the anchor plates 43.
[0032] In this embodiment, see Figure 2 In the cross-cable structure, the downstay cable 23 is equipped with a fixed prestressed clamp 25.
[0033] In this embodiment, see Figure 2 Anchors are installed at both ends of the cross-cable structure. The lower cable 23 is pre-embedded in the anchor plate 43 in the concrete column 44 through the cable sleeve 42. The cable sleeve 42 guides the lower cable 23 and applies prestress to the cross-cable structure through the tensioning cable. The lower cable 23 has a reserved overhanging connection section 41, which is horizontally set in the pre-embedded section in the concrete column 44.
[0034] In this embodiment, see Figure 3 Clean the impurities from the reinforced surface of the concrete beam 1, apply structural adhesive to the treated reinforced surface and the U-shaped sleeve 3, forming a structural adhesive layer 32 on the sides and bottom of the concrete beam 1 to be reinforced. The U-shaped sleeve 3 is then placed on the sides and bottom of the concrete beam 1 through the structural adhesive layer 32, and welded to the connecting plate 24. The connecting plate 24 is an arc-shaped structure made of steel, and the upper cross cable 21 of the connecting plate 24 is hinged to the connecting plate 24 via a high-strength pin 31.
[0035] In this embodiment, see Figure 4 The lower end of the V-shaped strut 26 is connected to the V-shaped strut connecting part 54 on the prestressed clamp plate 25; the upper part of the prestressed clamp plate 25 is fastened to the upper surface of the lower cable 23 by a low frictional resistance pad 55; the lower part of the prestressed clamp plate 25 is fastened to the lower surface of the lower cable 23 by a high frictional resistance pad 56; the second node is formed by the prestressed clamp plate 25.
[0036] In this embodiment, see Figure 4-5The prestressed clamping plate 25 includes two steel plates, upper and lower, for inserting and clamping the lower cable 23. An ear plate 51 is provided on the prestressed clamping plate 25. The lower cross cable 21 is connected to the ear plate 51. The lower ends of the lower cross cable 21 and the side cable 22 are hinged to the ear plate 51 by pins.
[0037] In this embodiment, see Figure 4-5 The upper and lower steel plates in the prestressed clamp 25 are connected by high-strength bolts 53. The lower cable 23 passes through the prestressed clamp 25 and is in direct contact with it. The two steel plates are tightened by high-strength bolts 53 on both the upper and lower sides of the steel plate to ensure that the lower cable 23 and the prestressed clamp 25 do not slip relative to each other.
[0038] In this embodiment, see Figure 6 This study focuses on prestressed cross-cable reinforced concrete beams, analyzing their bearing capacity under full-span loads. Under different full-span loads, the overall stiffness and bearing capacity of the prestressed cross-cable reinforced concrete beams are superior to those of the traditional tensioned cable reinforced concrete beams.
[0039] In this concrete beam reinforcement device, the cross-cable structure 2 is connected to the concrete beam 1 via a U-shaped sleeve 3. The cross-cable structure 2 mainly consists of cross cables 21, side cables 22, and a lower chord cable 23. The cross cables are installed between the upper chord beam and the lower cable. The upper end of the side cable is hinged to the U-shaped sleeve via a pin, and the lower end of the side cable is hinged to the lower end of the lower cross cable via a pin to a prestressed clamp. Anchors are installed at both ends of the cross-cable structure to fix the steel cables and transfer prestress. The lower cable is embedded in the concrete column, and prestress is applied to the cross-cable structure via a tensioning device. The cable-tensioned beam is in a tension state.
[0040] The above are preferred embodiments of the present utility model. Those skilled in the art can make various changes or improvements based on this. Without departing from the overall concept of the present utility model, these changes or improvements should all fall within the scope of protection claimed by the present utility model.
Claims
1. A concrete beam reinforcement device based on a prestressed cross-cable structure, used for reinforcing concrete beams, characterized in that: The concrete beam reinforcement device includes a cross cable structure and a U-shaped sleeve. The U-shaped sleeve is fixed to the concrete beam at intervals. The cross cable structure includes cross cables, pull cables, and V-shaped struts. The two ends of the pull cables are anchored to the lower sides of both ends of the concrete beam. The V-shaped struts are arranged in parallel and fixed between the U-shaped sleeves and the pull cables. A pair of cross cables are arranged between two adjacent V-shaped struts. The lower end of the cross cable is connected to the connection point between the V-shaped strut and the pull cable, and the upper end of the cross cable is connected to the connection point between the V-shaped strut and the U-shaped sleeve.
2. The concrete beam reinforcement device based on prestressed cross-cable structure according to claim 1, characterized in that: The concrete beam reinforcement device also includes anchorages, which are located at both ends of the cross cable structure and fixed to the outside of the concrete column, and prestress is applied to the cross cable structure by tensioning cables.
3. The concrete beam reinforcement device based on prestressed cross-cable structure according to claim 2, characterized in that: A prestressed clamp is provided on the pull cable, and the lower ends of the cross cable and V-shaped strut are connected to the prestressed clamp.
4. The concrete beam reinforcement device based on prestressed cross-cable structure according to claim 3, characterized in that: The prestressed clamping plate is hinged to the V-shaped strut.
5. The concrete beam reinforcement device based on prestressed cross-cable structure according to claim 4, characterized in that: The prestressed clamping plate includes two steel plates, upper and lower, which can be used to insert and clamp the pull-down cable, and one of the steel plates is provided with a lug for connecting the cross cable.
6. The concrete beam reinforcement device based on prestressed cross-cable structure according to claim 5, characterized in that: The lower end of the cross cable is hinged to the ear plate via a pin.
7. The concrete beam reinforcement device based on prestressed cross-cable structure according to claim 4, characterized in that: The prestressed clamp also includes a low-friction pad and a high-friction pad. The upper part of the prestressed clamp is fastened to the upper surface of the lower cable by the low-friction pad; the lower part of the prestressed clamp is fastened to the lower surface of the lower cable by the high-friction pad.
8. The concrete beam reinforcement device based on a prestressed cross-cable structure according to any one of claims 1-7, characterized in that: The cross cable structure also includes side cables, the lower end of which is connected to the connection point between the outermost V-shaped support and the pull cable, and the upper end of which is connected to the U-shaped sleeve.
9. The concrete beam reinforcement device based on a prestressed cross-cable structure according to any one of claims 1-7, characterized in that: A connecting plate is welded to the lower end of the U-shaped sleeve; the cross cable and V-shaped strut are connected to the connecting plate.
10. The concrete beam reinforcement device based on a prestressed cross-cable structure according to any one of claims 1-7, characterized in that: The U-shaped sleeve is attached to the concrete beam by a structural adhesive layer.