A kind of lock clamp node for CFRP cable and strut in beam string structure

Abstract

The utility model relates to a kind of lock clamp nodes for CFRP cable and strut in string structure, including by first half clamp, second half clamp splicing and being composed of lock clamp outer frame, the lock clamp outer frame inside is provided with by first rubber elastic half bushing and second rubber elastic half bushing and is composed of rubber elastic bushing, the lock clamp outer frame and rubber elastic bushing form mechanical interlock, the rubber elastic bushing middle part is provided with through slot for limiting CFRP cable. The utility model is simple in structure, reasonable in design, corrosion-resistant, easy to install, easy to replace, can also reduce the local shear force that CFRP cable is subjected to at node, prevent slip at strut node.

Description

Technical Field

[0001] This utility model relates to a locking node for CFRP cables and struts in a tensioned structure. Background Technology

[0002] Tensioned cable structures, as a rigid-flexible prestressed steel structure system, are widely used in large-span spatial structures due to their excellent mechanical properties and economic efficiency. In this structural system, the flexible cable, as the core load-bearing component, directly determines the overall structure's load-bearing efficiency and stability. The connection node between the flexible cable and the strut, as the force transmission hub, directly affects the overall performance of the structure.

[0003] In current engineering projects, due to the low strength and elastic modulus of CFRP cables in the vertical fiber direction and the small connection area between the strut and the cable, CFRP cables at the joints are prone to shear failure. This is not only detrimental to the cable's stress distribution but also easily leads to slippage at the strut joints. To ensure structural safety, it is urgent to solve the problem of how to ensure that the cables are not prone to shear failure and slippage, while also ensuring that the joints are not easily corroded in complex environments and that installation and replacement are convenient. Utility Model Content

[0004] This invention addresses the aforementioned problems by providing a locking node for CFRP cables and struts in tensioned structures. This facilitates installation and replacement while resolving the issues of shear failure and slippage of CFRP cables at the node.

[0005] The present invention is constructed as follows: it includes a locking frame composed of a first half-clamp and a second half-clamp. Inside the locking frame, there is a rubber elastic bushing composed of a first rubber elastic half-buffer and a second rubber elastic half-buffer. The locking frame and the rubber elastic bushing form a mechanical interlock. The middle part of the rubber elastic bushing is provided with a through groove for limiting the CFRP cable.

[0006] Furthermore, the first half-clamp and the second half-clamp are joined together to form an outer frame splice seam, and the first rubber elastic half-bushing and the second rubber elastic half-bushing are joined together to form a bushing splice seam. The outer frame splice seam and the bushing splice seam are at a 90-degree angle.

[0007] Furthermore, a strut connecting assembly is provided above the outer frame of the locking clamp. The lower part of the first half clamp and the lower part of the second half clamp are connected by a hinge. After the first half clamp and the second half clamp are assembled, their upper parts are connected to the strut connecting assembly by high-strength bolts.

[0008] Furthermore, the lower part of the strut connection assembly is provided with two strut lugs, and the upper part of the first half-clamp and the second half-clamp are both provided with cable clamp lugs. The strut lugs and cable clamp lugs on the corresponding sides are connected by high-strength bolts.

[0009] Furthermore, the through groove is provided with anti-slip texture.

[0010] Furthermore, the first and second rubber elastic half-sleeves are embedded with steel skeletons.

[0011] Furthermore, the through groove includes a semi-circular groove disposed inside the first rubber elastic half bushing and the second rubber elastic half bushing, and the two semi-circular grooves are joined together to form the through groove.

[0012] Furthermore, the first and second rubber elastic half-sleeves are made of rubber.

[0013] Furthermore, the high-strength bolts are made of carbon fiber.

[0014] Furthermore, the first and second half-clamps are made of aluminum alloy.

[0015] Compared with the prior art, the present invention has the following advantages: The device has a simple structure and reasonable design. The first and second rubber elastic half bushings are pre-installed into the outer frame of the locking clamp; the hinge closes the first and second half clamps, and the outer frame splice seam between the two and the bushing splice seam are spatially staggered at 90°; the bolt holes of the locking clamp outer frame and the strut connection assembly are aligned, high-strength bolts are installed and pre-tightened, which is not only corrosion resistant, easy to install and easy to replace, but also reduces the local shear force on the CFRP cable at the node and prevents slippage at the strut node. Attached Figure Description

[0016] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0017] Figure 2 This is a front view of an embodiment of the present utility model;

[0018] Figure 3 This is a side view of an embodiment of the present utility model;

[0019] Figure 4 This is a top view of an embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of the rubber elastic bushing according to an embodiment of the present utility model;

[0021] Figure 6 This is a schematic diagram of the outer frame structure of the lock clip according to an embodiment of the present utility model;

[0022] In the diagram: 1. First half-clamp; 2. Second half-clamp; 3. First rubber elastic half-shroud; 4. Second rubber elastic half-shroud; 5. Hinge; 6. High-strength bolt; 7. Cable clamp ear plate; 8. Support rod connecting assembly; 9. Through groove; 10. Steel frame; 11. CFRP cable; 12. Anti-slip texture; 13. Bushing splice seam; 14. Outer frame splice seam. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Example: Refer to Appendix Figure 1-6 As shown, a locking clamp node for CFRP cables and struts in a tensioned structure is provided, including a locking clamp outer frame composed of a first half-clamp and a second half-clamp. The locking clamp outer frame is provided with a rubber elastic bushing composed of a first rubber elastic half-buffer and a second rubber elastic half-buffer. The locking clamp outer frame and the rubber elastic bushing form a mechanical interlock. The middle part of the rubber elastic bushing is provided with a through groove for limiting the CFRP cable. The through groove is used to accommodate and clamp the CFRP cable.

[0025] The construction method for cable clamp joints includes the following steps:

[0026] (1) The first rubber elastic half bushing and the second rubber elastic half bushing are pre-installed into the outer frame of the locking clamp;

[0027] (2) The first half-clamp and the second half-clamp are closed by hinges, and the outer frame splicing seam and the bushing splicing seam between them are spatially staggered at 90°.

[0028] (3) Align the bolt holes of the locking clip outer frame with the strut connection assembly, install the high-strength bolts and apply preload.

[0029] The aforementioned mechanical interlock refers to the dumbbell-shaped first rubber elastic half-bushing, the dumbbell-shaped second rubber elastic half-bushing, and the locking clamp outer frame. Through the circumferential surrounding of the radial constraint boss of the locking clamp outer frame in the necked area in the middle of the rubber elastic bushing, bidirectional displacement restriction is generated, achieving rigid coupling.

[0030] In this embodiment of the utility model, the first half-clamp and the second half-clamp are joined together to form an outer frame splicing seam, and the first rubber elastic half-shield and the second rubber elastic half-shield are joined together to form a bushing splicing seam. The outer frame splicing seam and the bushing splicing seam are spatially staggered at 90 degrees.

[0031] In this embodiment of the utility model, a strut connecting assembly is provided above the outer frame of the locking clamp. The lower part of the first half clamp and the lower part of the second half clamp are connected by a hinge. After the first half clamp and the second half clamp are assembled, their upper parts are connected to the strut connecting assembly by high-strength bolts. The first half clamp, the second half clamp and the strut connecting assembly are connected by high-strength bolts to form a rigid outer frame.

[0032] In this embodiment of the utility model, the lower part of the strut connecting assembly is provided with two strut lugs, and the upper part of the first half-clamp and the second half-clamp are both provided with cable clamp lugs. The strut lugs and cable clamp lugs on the corresponding sides are connected by high-strength bolts.

[0033] In this embodiment of the utility model, the through groove is provided with anti-slip texture; the anti-slip texture can be any one of spiral texture, sawtooth texture or dot-shaped protrusion.

[0034] In this embodiment of the invention, the first rubber elastic half-sleeve and the second rubber elastic half-sleeve are embedded with a steel skeleton.

[0035] In this embodiment of the utility model, the through groove includes a semi-circular groove disposed inside the first rubber elastic half bushing and the second rubber elastic half bushing, and the two semi-circular grooves are joined together to form the through groove.

[0036] In this embodiment of the invention, the first rubber elastic half-shroud and the second rubber elastic half-shroud are dumbbell-shaped.

[0037] In this embodiment of the invention, the first rubber elastic half-sleeve and the second rubber elastic half-sleeve are made of rubber.

[0038] In this embodiment of the invention, the high-strength bolt is made of carbon fiber.

[0039] In this embodiment of the utility model, the first half-clamp and the second half-clamp are made of aluminum alloy.

[0040] Unless otherwise stated, if any technical solution disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solution of this utility model. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this utility model.

[0041] If the terms "first" or "second" are used in this document to specify components, those skilled in the art should know that the use of "first" or "second" is merely for the purpose of distinguishing components in description, and unless otherwise stated, the above terms have no special meaning.

[0042] Meanwhile, if the present invention discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, the mutually fixed connection can also be replaced by an integral structure (e.g., manufactured by casting process) (except where it is obviously impossible to use an integral forming process).

[0043] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0044] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A locking joint for CFRP cables and struts in a tensioned structure, characterized in that, The device includes a locking frame composed of a first half-clamp and a second half-clamp. Inside the locking frame, there is a rubber elastic bushing composed of a first rubber elastic half-buffer and a second rubber elastic half-buffer. The locking frame and the rubber elastic bushing form a mechanical interlock. The middle part of the rubber elastic bushing is provided with a through groove for limiting the CFRP cable.

2. A locking joint for CFRP cables and struts in a tensioned structure according to claim 1, characterized in that, The first half-clamp and the second half-clamp are joined together to form an outer frame splice seam. The first rubber elastic half-bushing and the second rubber elastic half-bushing are joined together to form a bushing splice seam. The outer frame splice seam and the bushing splice seam are at a 90-degree angle.

3. A locking joint for CFRP cables and struts in a tensioned structure according to claim 1, characterized in that, A strut connecting assembly is provided above the outer frame of the locking clamp. The lower part of the first half clamp and the lower part of the second half clamp are connected by a hinge. After the first half clamp and the second half clamp are assembled, their upper parts are connected to the strut connecting assembly by high-strength bolts.

4. A locking joint for CFRP cables and struts in a tensioned structure according to claim 3, characterized in that, The lower part of the strut connection assembly is provided with two strut lugs, and the upper part of the first half-clamp and the second half-clamp are provided with cable clamp lugs. The strut lugs and cable clamp lugs on the corresponding sides are connected by high-strength bolts.

5. A locking joint for CFRP cables and struts in a tensioned structure according to claim 1, characterized in that, The groove is provided with anti-slip texture.

6. A locking joint for CFRP cables and struts in a tensioned structure according to claim 1, characterized in that, The first and second rubber elastic half-sleeves are embedded with steel skeletons.

7. A locking joint for CFRP cables and struts in a tensioned structure according to claim 1, characterized in that, The through groove includes a semi-circular groove disposed inside the first rubber elastic half bushing and the second rubber elastic half bushing, and the two semi-circular grooves are joined together to form the through groove.

8. A locking joint for CFRP cables and struts in a tensioned structure according to claim 1, characterized in that, The first and second rubber elastic half-sleeves are made of rubber.

9. A locking joint for CFRP cables and struts in a tensioned structure according to claim 3 or 4, characterized in that, The high-strength bolts are made of carbon fiber.

10. A locking joint for CFRP cables and struts in a tensioned structure according to claim 1, characterized in that, The first and second halves of the clip are made of aluminum alloy.

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