Bridge cable damping mechanism

Abstract

The application discloses a bridge cable-stayed damping mechanism and belongs to the technical field of bridge engineering, which comprises a bottom plate installed on a bridge deck and a mounting frame installed on a cable-stayed cable, a connecting assembly is installed between the bottom plate and the mounting frame, the connecting assembly comprises a first connecting rod connected with the bottom plate through a spherical hinge and a second connecting rod connected with the mounting frame through a spherical hinge, the first connecting rod and the second connecting rod are both connected with a connecting plate through spherical hinges at one end close to each other, a damping device is arranged at the spherical hinge connecting position, the two connecting plates are connected through a first spring, and a buffer fixing seat is elastically connected to the two sides of the mounting frame and is installed on the cable-stayed cable. When the cable-stayed cable vibrates, the mounting frame is driven to move, the first connecting rod and the second connecting rod are rotated through the spherical hinge connecting position, the first spring between the two connecting plates is deformed to realize buffering, and the damping device of the spherical hinge connecting position absorbs vibration, so that when the cable-stayed cable vibrates in any direction, the connecting assembly can realize buffering and vibration absorption.

Description

Technical Field

[0001] This invention belongs to the field of bridge engineering technology, specifically relating to a bridge cable-stayed vibration damping mechanism. Background Technology

[0002] Cable-stayed bridges are a common structural form for long-span bridges. They mainly consist of towers, main beams, and stay cables. Among them, the stay cables are important load-bearing components. Due to their relatively small mass, stiffness, and damping, cable stay cables are prone to vibration. The arrangement of stay cables is mostly planar. Factors that cause cable stay cable vibration include: wind and rain-induced vibration, vortex-induced vibration, wake galloping vibration, buffeting, aerodynamic instability, and parametric vibration. Therefore, buffer devices need to be installed on the stay cables.

[0003] Existing technology, such as Chinese Patent No. CN 111877159 B, discloses a bridge cable-stayed bridge damping and vibration reduction mechanism, including a bridge deck; a set of mounting bases fixedly connected to the top of the bridge deck; a set of support rods a hinged to the top of the mounting bases; a set of support rods b slidably connected to the right side of the mounting bases; two sets of buffer dampers hinged together between the support rods a and b; a set of cable fixing seats hinged together at the top of the support rods a and b; a set of buffer fixing seats elastically connected to both sides of the cable fixing seats; and both the buffer fixing seats and the cable fixing seats are simultaneously fixed to the bridge cable-stayed bridge. By utilizing two sets of buffer dampers for buffering and vibration absorption, good vibration absorption capacity is ensured, and the two sets of buffer dampers improve working stability. When the installation strength of the cable fixing seats is insufficient, buffer springs in the buffer seats can also be used for buffering and vibration absorption, ensuring working stability and better guaranteeing bridge safety.

[0004] Based on the above, during use, when the stay cable vibrates, the stay cable causes the adjusting cable fixing seat to fluctuate up and down to buffer and absorb vibration in the longitudinal direction of the stay cable; if the stay cable exhibits other forms of vibration, such as lateral vibration, it cannot buffer and absorb vibration in the lateral direction and is prone to damage to the support rod.

[0005] Therefore, it is necessary to propose a bridge cable-stayed cable damping mechanism to solve the above problems. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a bridge cable-stayed bridge vibration damping mechanism to solve the problem that the prior art cannot buffer and absorb vibrations other than longitudinal vibrations of the cable-stayed bridge.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides a bridge cable-stayed vibration damping mechanism, comprising: a base plate installed on the bridge deck and a mounting frame installed on the cable-stayed cable. A connecting assembly is installed between the base plate and the mounting frame. The connecting assembly includes a first connecting rod ball-jointed to the base plate and a second connecting rod ball-jointed to the mounting frame. The ends of the first and second connecting rods are ball-jointed to connecting plates. Damping is provided at the ball-joint connection. The two connecting plates are connected by a first spring. Buffer fixing seats are elastically connected to both sides of the mounting frame. The buffer fixing seats are installed on the cable-stayed cable.

[0009] Furthermore, two sets of connecting components are installed between the base plate and the mounting frame, the stay cable is located between the two sets of connecting components, the two sets of connecting components are connected by connecting rods, and connecting rods are installed between the two first connecting rods and between the two second connecting rods.

[0010] Furthermore, the connecting rod is provided with a first sliding groove, and a first slider is slidably installed in the first sliding groove. A second spring is connected between the opposite side walls of the first slider and the inner wall of the first sliding groove. The base plate is provided with a second sliding groove, and a second slider is slidably installed in the second sliding groove. A third spring is connected between the opposite side walls of the second slider and the inner wall of the second sliding groove. A support rod is hinged between the second slider and the first slider located between the two second connecting rods. A buffer damper is hinged between the support rod and the first slider located between the two first connecting rods.

[0011] Furthermore, the first connecting rod, the second connecting rod, and the support rod all include a threaded sleeve and a screw threadedly connected to the threaded sleeve.

[0012] Furthermore, the base plate includes a first base plate for mounting the first connecting rod and a second base plate with a second sliding groove. The second base plate is slidably connected to the first base plate, and both the second base plate and the first base plate are bolted to the bridge deck.

[0013] Furthermore, multiple first springs are arranged circumferentially around the axis of the two connecting plates.

[0014] Furthermore, the buffer fixing seat and the mounting frame are connected by a tightening screw, and the tightening screw and the buffer fixing seat are pressed together by a nut. A buffer spring sleeved on the tightening screw is installed between the buffer fixing seat and the mounting frame.

[0015] The beneficial effects of this invention are as follows:

[0016] When the stay cable vibrates, the present invention drives the mounting frame to move. The first connecting rod and the second connecting rod rotate through the ball joint connection, causing the first spring between the two connecting plates to deform and achieve buffering. Through the damping and vibration absorption of the ball joint connection, the stay cable can be buffered and absorbed by the connecting components when it vibrates in any direction.

[0017] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0018] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0019] Figure 1 This is a schematic diagram of the overall structure installation according to an embodiment of the present invention;

[0020] Figure 2 Embodiments of the present invention Figure 1 A magnified view of part A in the middle;

[0021] Figure 3 This is a schematic diagram of the overall structure installation according to an embodiment of the present invention.

[0022] The following components are marked in the attached diagram: bridge deck 1, base plate 2, second slide groove 201, second slider 202, third spring 203, first base plate 204, second base plate 205, stay cable 3, mounting bracket 4, connecting assembly 5, first connecting rod 501, second connecting rod 502, connecting plate 503, first spring 504, threaded sleeve 505, screw 506, buffer fixing seat 6, connecting rod 7, first slide groove 701, first slider 702, second spring 703, support rod 8, buffer damper 9, top screw 10, buffer spring 11. Detailed Implementation

[0023] like Figures 1-3 As shown, the present invention provides a bridge cable-stayed shock absorption mechanism, comprising: a base plate 2 fixedly installed on the bridge deck 1, and a mounting frame 4 installed on the cable-stayed cable 3. A connecting assembly 5 is installed between the base plate 2 and the mounting frame 4. The connecting assembly 5 includes a first connecting rod 501 ball-jointed to the base plate 2 and a second connecting rod 502 ball-jointed to the mounting frame 4. The ends of the first connecting rod 501 and the second connecting rod 502 that are close to each other are ball-jointed to a connecting plate 503. Damping is provided at the ball-joint connection. The two connecting plates 503 are connected by a first spring 504. Buffer fixing seats 6 are elastically connected to both sides of the mounting frame 4. The buffer fixing seats 6 are installed on the cable-stayed cable 3.

[0024] In this scheme, when the stay cable 3 vibrates, it drives the mounting frame 4 to move. With the axis of the bridge deck 1 as the Z-axis, when the mounting frame 4 moves along the Z-axis, X-axis, and Y-axis, the first connecting rod 501 and the second connecting rod 502 rotate through the ball joint connection, causing the first spring 504 between the two connecting plates 503 to deform and achieve buffering. Through the damping and vibration absorption of the ball joint connection, the stay cable can be buffered and absorbed by the connecting component 5 when it vibrates in any direction.

[0025] In one embodiment of the present invention, two sets of connecting components 5 are installed between the base plate 2 and the mounting frame 4, the inclined cable 3 is located between the two sets of connecting components 5, the two sets of connecting components 5 are connected by connecting rods 7, and connecting rods 7 are installed between the two first connecting rods 501 and between the two second connecting rods 502.

[0026] In this scheme, by setting two sets of connecting components 5, the buffering and vibration absorption capacity is improved; since the stay cables on the bridge are arranged in multiple planes, placing the stay cable 3 between the two sets of connecting components 5 can avoid other stay cables 3 on the same plane and prevent the stay cable 3 located between the two sets of connecting components 5 from vibrating too much, thus further improving the vibration resistance; the two sets of connecting components 5 are connected by connecting rods 7, which ensures the synchronous movement of the two first connecting rods 501 and the two second connecting rods 502.

[0027] In one embodiment of the present invention, the connecting rod 7 is provided with a first sliding groove 701, and a first slider 702 is slidably installed in the first sliding groove 701. A second spring 703 is connected between the opposite side walls of the first slider 702 and the inner wall of the first sliding groove 701. The base plate 2 is provided with a second sliding groove 201, and a second slider 202 is slidably installed in the second sliding groove 201. A third spring 203 is connected between the opposite side walls of the second slider 202 and the inner wall of the second sliding groove 201. A support rod 8 is hinged between the second slider 202 and the first slider 702 located between the two second connecting rods 502. A buffer damper 9 is hinged between the support rod 8 and the first slider 702 located between the two first connecting rods 501.

[0028] In this design, when the stay cable 3 causes the mounting frame 4 to vibrate longitudinally, the second connecting rod 502 and the connecting rod 7 located between the second connecting rods 502 both move longitudinally, thereby causing the second slider 202 to slide along the second slide groove 201 via the support rod 8. This process is buffered by the third spring 203. Furthermore, the first connecting rod 501 and the connecting rod 7 located between the first connecting rods 501 both move longitudinally. Due to the rotation of the support rod 8, this process is further enhanced by the buffer damper 9. When the stay cable 3 causes the mounting frame 4 to vibrate laterally... When the connecting component 5 and the connecting rod 7 rotate laterally, the first slider 702 slides along the first groove 701. The second spring 703 acts as a buffer and facilitates the reset of the connecting component 5 after lateral rotation. The support rod 8 is hinged between the second slider 202 and the first slider 702 located between the two second connecting rods 502, so that the support rod 8 can only rotate along the YZ plane. If the connecting component 5 is separated from the mounting frame 4, the connecting component 5 can only tilt along the YZ plane, avoiding the connecting component 5 tilting along the XZ plane onto the bridge surface and causing a safety accident.

[0029] In one embodiment of the present invention, the first connecting rod 501, the second connecting rod 502 and the support rod 8 each include a threaded sleeve 505 and a screw 506 threadedly connected to the threaded sleeve 505.

[0030] In this scheme, the first connecting rod 501 and the second connecting rod 502 are configured to form a telescopic rod by engaging with the screw rod 506 through the threaded sleeve 505. Rotating the screw rod 506 can adjust the length of the first connecting rod 501, the second connecting rod 502, or the support rod 8 to accommodate the cable 3 at different installation heights.

[0031] In one embodiment of the present invention, the base plate 2 includes a first base plate 204 for mounting a first connecting rod 501 and a second base plate 205 provided with a second sliding groove 201. The second base plate 205 is slidably connected to the first base plate 204, and both the second base plate 205 and the first base plate 204 are bolted to the bridge deck 1.

[0032] In this scheme, the support position of the support rod 8 can be adjusted by sliding the second base plate 205 to accommodate the cable stays 3 at different heights. After the second base plate 205 is adjusted to the preset position, it is fixedly connected to the bridge deck 1 by bolts.

[0033] In one embodiment of the present invention, a plurality of first springs 504 are arranged circumferentially around the axis of the two connecting plates 503.

[0034] In one embodiment of the present invention, the buffer fixing seat 6 and the mounting frame 4 are connected by a tightening screw 10, the top screw 10 and the buffer fixing seat 6 are tightened by a nut, and a buffer spring 11 sleeved on the tightening screw 10 is installed between the buffer fixing seat 6 and the mounting frame 4.

[0035] In this scheme, the two sets of buffer fixing seats 6 are pressed together by the pre-tightening screw 10 during use to ensure that there is a certain clamping force between the buffer fixing seat 5 and the mounting bracket 4.

[0036] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A bridge cable-stayed vibration damping mechanism, comprising: A base plate installed on the bridge deck and a mounting frame installed on the stay cables, characterized in that: a connecting assembly is installed between the base plate and the mounting frame, the connecting assembly including a first connecting rod ball-jointed to the base plate and a second connecting rod ball-jointed to the mounting frame, each end of the first and second connecting rods being ball-jointed to a connecting plate, the ball-joint connection being damped, the two connecting plates being connected by a first spring, and buffer fixing seats being elastically connected to both sides of the mounting frame, the buffer fixing seats being installed on the stay cables; two sets of the connecting assemblies are installed between the base plate and the mounting frame, the stay cables being located between the two sets of connecting assemblies. Connecting rods are installed between the two first connecting rods and between the two second connecting rods. Each connecting rod has a first sliding groove, within which a first slider is slidably mounted. Second springs connect the opposite side walls of the first slider to the inner wall of the first sliding groove. A second sliding groove is provided on the base plate, within which a second slider is slidably mounted. Third springs connect the opposite side walls of the second slider to the inner wall of the second sliding groove. A support rod is hinged between the second slider and the first slider located between the two second connecting rods. A buffer damper is hinged between the support rod and the first slider located between the two first connecting rods.

2. The bridge cable-stayed vibration damping mechanism according to claim 1, characterized in that: The first connecting rod, the second connecting rod, and the support rod all include a threaded sleeve and a screw threadedly connected to the threaded sleeve.

3. The bridge cable-stayed vibration damping mechanism according to claim 1, characterized in that: The base plate includes a first base plate for mounting the first connecting rod and a second base plate with a second sliding groove. The second base plate is slidably connected to the first base plate, and both the second base plate and the first base plate are bolted to the bridge deck.

4. The bridge cable-stayed vibration damping mechanism according to claim 1, characterized in that: Multiple first springs are arranged circumferentially around the axis of the two connecting plates.

5. The bridge cable-stayed vibration damping mechanism according to claim 1, characterized in that: The buffer fixing seat and the mounting frame are connected by a tightening screw, and the tightening screw and the buffer fixing seat are pressed together by a nut. A buffer spring sleeved on the tightening screw is installed between the buffer fixing seat and the mounting frame.

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