Suspension bridge damping central buckle and suspension bridge

Abstract

The utility model relates to the technical field of suspension bridge, specifically relates to a suspension bridge damping central buckle and suspension bridge. The suspension bridge damping central buckle includes connecting rod spare, two ends of connecting rod spare are hinged with cable clamp and main beam each other, connecting rod spare is arranged symmetrically and forms triangular mechanism to restrain suspension main cable, connecting rod spare includes at least one section of corrugated steel pipe, both ends of connecting rod spare end face are all perpendicularly equipped with the connecting plate, is equipped with the hinge piece on the connecting plate to supply with the cable clamp and the main beam hinged. The utility model discloses through the axial elastic deformation of corrugated steel pipe and realizes energy dissipation mechanism - in the bridge vibration process, corrugated steel pipe can effectively absorb and convert structural kinetic energy through the reciprocating tensile - compression deformation, thereby significantly improves the anti -seismic performance of bridge system.

Description

Technical Field

[0001] This utility model relates to the field of suspension bridge technology, and in particular to a suspension bridge damping central buckle and a suspension bridge. Background Technology

[0002] The central tie, located at the mid-span of a suspension bridge, serves to limit the longitudinal and lateral relative displacement of the connecting main cable and stiffening girder under wind loads, earthquakes, or vehicle loads. This reduces lateral sway and longitudinal slippage of the main girder, preventing structural fatigue or damage due to excessive deformation. Furthermore, the central tie improves the overall stiffness of the bridge structure, enhances its dynamic characteristics, and reduces vibration amplitude caused by live loads (such as vehicles) and wind-induced vibrations.

[0003] Existing central cable tie systems are mostly classified as rigid or flexible. Rigid central cable ties directly fix the main cable to the main beam using rigid components, significantly improving the bridge's longitudinal stiffness, suppressing longitudinal and lateral displacements of the main cable and main beam, and enhancing wind resistance. However, under strong earthquakes, rigid central cable ties cannot dissipate seismic or wind energy through deformation, making them prone to stress concentration, leading to fatigue damage or even breakage of the main cable or main beam. Flexible central cable ties use flexible cables or bar cables to connect the main cable to the main beam, allowing for some deformation. They can release displacements caused by temperature or small loads through elastic deformation, reducing local stress. However, their control over the vertical displacement of the main beam is weaker than that of rigid central cable ties, and frequent small-displacement vibrations can easily lead to cable fatigue damage.

[0004] How to improve the stress on the central buckle while achieving effective displacement control is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to overcome at least one deficiency in the existing technology and to provide a suspension bridge damping central buckle and suspension bridge.

[0006] In a first aspect, the present invention provides a central damping buckle for a suspension bridge, comprising connecting rods, the two ends of which are respectively hinged to a cable clamp and a main beam of the suspension bridge. The cable clamp is connected to the main cable of the suspension bridge. The connecting rods are symmetrically arranged to form a triangular mechanism to constrain the relative displacement of the main cable and the main beam. The connecting rods include at least one section of corrugated steel pipe. Both ends of the connecting rods are provided with connecting plates, and the connecting plates are provided with hinges for hinged connection with the cable clamp or the main beam.

[0007] Preferably, the corrugated steel pipe is provided with end plates at both ends for sealing the corrugated steel pipe, and the corrugated steel pipe is filled with a filler.

[0008] Preferably, the connecting member further includes at least one section of straight steel pipe, and the corrugated steel pipe and the straight steel pipe are integrally connected. The arrangement sequence of the corrugated steel pipe and the straight steel pipe can be corrugated steel pipe-straight steel pipe-corrugated steel pipe, straight steel pipe-corrugated steel pipe-straight steel pipe, corrugated steel pipe-straight steel pipe, etc., and is not limited to the examples above. By combining the straight steel pipe with the corrugated steel pipe of a designed length, the connecting member has sufficient connection length. The designed length of the corrugated pipe can be reasonably selected according to the actual working conditions.

[0009] Preferably, the corrugated steel pipe is a single section, located in the middle of the connecting rod, with a straight steel pipe connected to each end of the corrugated steel pipe, and the end of the straight steel pipe connected to the connecting plate. This design is simple in structure, easy to process, and aesthetically pleasing.

[0010] Preferably, the hinge includes an ear plate, which is perpendicularly connected to the connecting plate, and the ear plate is hinged to the cable clamp or main beam via a connecting pin.

[0011] Preferably, the above-mentioned suspension bridge damping central buckle also includes a main beam connecting device, which is hinged to the end of the connecting rod away from the cable clamp. The main beam connecting device is detachably connected to the main beam to facilitate the installation and removal of the connecting rod.

[0012] Preferably, the corrugated steel pipe adopts a sinusoidal waveform, which results in uniform deformation and smooth stress distribution, facilitating stiffness and damping design. Other possible implementations include U-shaped, Ω-shaped, and sawtooth-shaped waveforms, which can also achieve lower axial stiffness and better ductility, and dissipate energy through sufficient deformation, not limited to the examples mentioned above.

[0013] Secondly, this utility model provides a suspension bridge, including the aforementioned suspension bridge damping central buckle. The suspension bridge damping central buckle is disposed at the mid-span of the suspension bridge to limit the relative displacement between the main girder and the main cable, thereby reducing structural deformation. The main girder of a long-span suspension bridge experiences a large bending moment near the mid-span. The aforementioned suspension bridge damping central buckle provides additional constraint, increases the coordinated deformation of the main girder and the main cable, improves the overall structural stiffness, and prevents excessive torsion or local instability of the beam.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention provides a damping central buckle for suspension bridges, which achieves energy dissipation through the axial elastic deformation of corrugated steel pipes. During bridge vibration, the corrugated steel pipes effectively absorb and convert structural kinetic energy through reciprocating tensile-compression deformation, thereby significantly improving the seismic performance of the bridge system. This energy dissipation and vibration reduction design based on the principle of metal plastic deformation can ensure structural connection stiffness and limit the displacement of the main cable and main girder under static conditions, and also achieve adaptive energy dissipation under dynamic loads. Compared with traditional rigid central buckles, this solution takes into account both structural flexibility and stability, and is more conducive to avoiding stress concentration in the main cable or main girder; compared with traditional flexible central buckles, this solution has a better control effect on the vertical displacement of the main girder. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a suspension bridge damping central buckle in Example 1. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of a suspension bridge damping central buckle in Example 1. Figure 2 ;

[0018] Figure 3 This is a diagram showing the installation status of the central damping buckle of a suspension bridge.

[0019] Figure 4 This is a structural schematic diagram of the connecting rods;

[0020] Figure 5 for Figure 4 Structural cross-sectional view;

[0021] Figure 6 This is a schematic diagram of the cable clamp structure;

[0022] Figure 7 A schematic diagram of a suspension bridge structure with a central suspension bridge damping buckle;

[0023] Figure 8 for Figure 7 Enlarged view of the suspension bridge structure with a damping central buckle installed in the middle of the bridge span;

[0024] Figure 9 This is a simulation diagram of the stress on a corrugated steel pipe;

[0025] Figure 10 This is a curve showing the load-displacement calculation results for the corrugated steel pipe.

[0026] Markings in the diagram: 1-Cable clamp; 2-Main beam; 3-Main cable; 4-Corrugated steel pipe; 5-Straight steel pipe; 6-Connecting plate; 7-Ear plate; 8-Lifting cable; 9-Connecting pin; 10-Filling material. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0028] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0030] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0031] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0032] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0033] Example 1

[0034] like Figures 1-6 As shown, a suspension bridge damping central buckle includes connecting rods, cable clamps 1, and a main beam connecting device.

[0035] The two ends of the connecting rod are hinged to the cable clamp 1 and the main beam 2 of the suspension bridge, respectively. The cable clamp 1 is connected to the main cable 3 of the suspension bridge. The connecting rods are symmetrically arranged to form a triangular mechanism to constrain the relative displacement of the main cable 3 and the main beam 2 of the suspension bridge. In this embodiment, the connecting rod includes at least one section of corrugated steel pipe 4. Both ends of the connecting rod are vertically provided with connecting plates 6, and the connecting plates 6 are provided with hinges for hinged connection with the cable clamp 1 or the main beam 2.

[0036] In this embodiment, the rotation axes of the hinges at both ends of the connecting rod are aligned in the same direction and are perpendicular to the triangular plane containing the main cable 3 and the connecting rod. The corrugated steel pipe 4 section of the connecting rod has low axial stiffness and high shear stiffness. Under external loads, it can effectively absorb and convert structural kinetic energy through the reciprocating tensile-compression deformation of the corrugated steel pipe section, thus better adapting to the vibration deformation of the main cable and main beam. At the same time, the hinged connection structure and the structural stiffness and material damping characteristics of the connecting rod can constrain the vibration deformation of the main cable and main beam in multiple dimensions, enhancing the synergistic effect between the main beam and the main beam.

[0037] In an optional embodiment, end plates are provided at both ends of the corrugated steel pipe 4 to seal the corrugated steel pipe 4, and a flexible polymer filler 10, such as rubber, carbon particles, or plastic, is filled inside the corrugated steel pipe 4. The end end plates are used to seal the flexible material, and the damping of the corrugated steel pipe 4 can be increased by filling the section of the corrugated steel pipe 4 with flexible material.

[0038] In an optional embodiment, the connecting member further includes at least one section of straight steel pipe 5, with the corrugated steel pipe 4 and the straight steel pipe 5 integrally connected. For example, the corrugated steel pipe 4 can be set to one section, located in the middle of the connecting member, with one end of the corrugated steel pipe 4 connected to a section of straight steel pipe 5, and the end of the straight steel pipe 5 connected to the connecting plate 6. This structure is simple, easy to process, and aesthetically pleasing. One end of the straight steel pipe 5 is connected to the cable clamp 1 via a hinge, and the other end of the straight steel pipe 5, away from the cable clamp 1, is hinged to the main beam connecting device via a hinge. The cable clamp adopts a clamp-like structure that closes at both ends, such as... Figure 6 As shown, it includes an upper clamp structure and a lower clamp structure. Both the upper and lower clamp structures are provided with semi-circular grooves, and a row of connecting holes are provided on both sides of the semi-circular grooves. The lower clamp structure has a hanging plate extending downward from the middle. The hanging plate has a through hole for connecting the hinge. The through hole has a chamfer on its lower side to facilitate a tight connection with the connecting rod and avoid structural interference with the connecting plate. The upper clamp structure and the lower clamp structure of the cable clamp 1 are connected by a torsion shear bolt. The main cable 3 of the suspension bridge is clamped by the preload of the high-strength bolt. The main beam connecting device is used for detachable connection with the main beam 2.

[0039] In an optional embodiment, the hinge includes an ear plate 7, preferably a double ear plate 7 structure, which is perpendicularly connected to the connecting plate 6 and can be embedded and engaged with the cable clamp 1; the connecting pin 9 is disposed between the cable clamp 1 and the ear plate 7, so that the cable clamp 1 and the ear plate 7 can rotate relative to each other, which has better applicability.

[0040] The ear plate 7, connecting plate 6, original straight steel pipe 5, corrugated steel pipe 4 and plug plate are all connected by welding.

[0041] In this embodiment, the corrugated steel pipe 4 preferably adopts a sinusoidal waveform, which has uniform deformation, smooth stress distribution, relatively low axial stiffness, and good ductility, and can dissipate energy through sufficient deformation. As other possible implementations, the corrugated steel pipe 4 can also adopt U-shaped, Ω-shaped, or other waveform shapes.

[0042] Furthermore, the above-mentioned cable clamp is provided with two sling holes in the middle for connecting the sling 8. The cable clamp 1 and the main beam 2 are connected by connecting rods and sling 8.

[0043] The central damping buckle of the suspension bridge is located between the main cable 3 and the stiffening girder 2. By limiting the relative displacement between the two, it improves the overall integrity of the bridge. By adding corrugated steel pipe 4 as a structural element to the connecting member of the central damping buckle, the stiffness and damping of the corrugated steel pipe 4 can be adjusted according to the frequency of the main girder 2 to achieve optimal vibration reduction. In other words, the vibration reduction effect can be achieved by adjusting the structural parameters of the corrugated steel pipe 4, such as the wave height. f Wavelength p nominal diameter D and wall thickness tThe stiffness and damping of the corrugated steel pipe 4 are adjusted to achieve optimal vibration reduction effect in the central damping buckle of the suspension bridge, adapting to the frequency dynamic response of the main beam 2. This avoids excessive external loads that could cause yielding strain in the connecting members, leading to irreversible deformation. The design is convenient and the mechanical properties are controllable. The nominal diameter D is taken as the nominal diameter of the straight steel pipe 5, which in this embodiment is the average of the inner and outer diameters of the corrugated steel pipe 4.

[0044] The aforementioned suspension bridge's damping central buckle achieves an energy dissipation mechanism through the axial elastic deformation of the corrugated steel pipe. During bridge vibration, the corrugated steel pipe effectively absorbs and converts structural kinetic energy through reciprocating tensile-compression deformation, thereby significantly improving the bridge system's seismic performance. This energy dissipation and vibration reduction design, based on the principle of metal plastic deformation, ensures structural connection stiffness to limit the displacement of the main cable 3 and main beam 2, while also achieving adaptive energy dissipation under dynamic loads, preventing rigid failure of the main cable 3 or main beam 2 due to stress concentration.

[0045] The effects of using the aforementioned suspension bridge damping central buckle technology were compared and illustrated using MIDAS finite element analysis modeling software:

[0046] The stress and load-displacement variations of the corrugated steel pipe were calculated using the parameters shown in Table 1 below. Figure 9 , Figure 10 As shown:

[0047] .

[0048] For the connecting members between the main cable and the main girder in the suspension bridge structural model, the same seismic load was applied under the conditions of using rigid dampers, damped central buckles, and without central buckles, respectively. The maximum deformation values ​​of the main girder are shown in Table 2 below, and the internal force results of the main girder are shown in Table 3 below:

[0049] ;

[0050] .

[0051] It can be seen that the rigid central buckle has the best effect in suppressing deformation, but it results in the largest internal force in the main beam. The damped central buckle can not only basically achieve the deformation suppression effect of the rigid central buckle, but also significantly reduce the internal force in the main beam.

[0052] The aforementioned suspension bridge damping central buckle combines rigidity and flexibility in its design. It can dissipate energy through deformation, reducing the risk of rigid failure of the main cable or main girder due to stress concentration, while also limiting the displacement of the main cable and main girder, thus comprehensively improving longitudinal stiffness and seismic ductility. Compared to existing damping central buckles, this suspension bridge damping central buckle can achieve both limiting and energy dissipation based on conventional steel structures. It has a simple structure, is easy to connect, has lower requirements for materials and construction technology, and is cost-effective.

[0053] Example 2

[0054] Based on Embodiment 1, this embodiment provides a suspension bridge, such as Figure 7 , Figure 8 As shown, the suspension bridge damping central buckle mentioned above is installed at the mid-span of the suspension bridge and is used for multi-directional vibration reduction of the short suspension cables at the mid-span.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A suspension bridge damping central buckle, comprising connecting rods, the two ends of which are respectively hinged to a cable clamp (1) and a main beam (2) of the suspension bridge, the cable clamp (1) being connected to the main cable (3) of the suspension bridge, the connecting rods being symmetrically arranged to form a triangular mechanism to constrain the relative displacement of the main cable (3) and the main beam (2), characterized in that, The connecting rod includes at least one section of corrugated steel pipe (4), and both ends of the connecting rod are provided with connecting plates (6). The connecting plates (6) are provided with hinges for hinged connection with the cable clamp (1) or the main beam (2).

2. The suspension bridge damping central buckle according to claim 1, characterized in that, The corrugated steel pipe (4) is provided with end plates at both ends, and the corrugated steel pipe (4) is provided with filler (10).

3. The suspension bridge damping central buckle according to claim 1, characterized in that, The connecting rod also includes at least one straight steel pipe (5), and the corrugated steel pipe (4) and the straight steel pipe (5) are integrally connected.

4. A suspension bridge damping central buckle according to claim 3, characterized in that, The number of the corrugated steel pipes (4) is one section. The corrugated steel pipes (4) are located in the middle of the connecting rod. The two ends of the corrugated steel pipes (4) are respectively connected to a section of the straight steel pipe (5). The end of the straight steel pipe (5) is connected to the connecting plate (6).

5. A suspension bridge damping central buckle according to any one of claims 1-4, characterized in that, The hinge includes an ear plate (7), which is perpendicularly connected to the connecting plate (6). The ear plate (7) is hinged to the cable clamp (1) or the main beam (2) via a connecting pin (9).

6. A suspension bridge damping central buckle according to any one of claims 1-4, characterized in that, It also includes a main beam connecting device, which is hinged to the end of the connecting rod away from the cable clamp (1), and the main beam connecting device is detachably connected to the main beam (2).

7. A suspension bridge damping central buckle according to any one of claims 1-4, characterized in that, The corrugated steel pipe (4) adopts a sine wave, U-shape, Ω-shape or sawtooth shape.

8. A suspension bridge, characterized in that, Includes the suspension bridge damping central buckle as described in any one of claims 1-7, wherein the suspension bridge damping central buckle is disposed at the mid-span of the suspension bridge.

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