Vibration reduction structure of cable-stayed bridge

Abstract

The utility model discloses a vibration reduction structure of a cable-stayed bridge, and relates to the technical field of bridge construction. Supporting columns are symmetrically and fixedly connected to the bottom of the bridge, a bridge tower is fixedly connected to the top of the bridge, a first cable-stayed part is fixedly installed on one side of the bridge tower, the other end of the first cable-stayed part is fixedly connected with the top of the bridge, and a plurality of second cable-stayed parts are evenly and fixedly connected to the top of the bridge. The vibration reduction assembly is arranged, when the multiple second straight pull pieces shake, the first connecting cylinder is driven to shake, at the moment, vibration generated between the adjacent second straight pull pieces can be relieved through a second damper on one side of a fixing plate, meanwhile, vibration generated by the second straight pull pieces can be buffered through extrusion shrinkage of a guide cylinder, and therefore the vibration reduction effect is achieved. Through cooperation of the auxiliary assembly and the vibration reduction assembly, vibration generated by the first inclined pulling piece and the second straight pulling piece can be effectively relieved, the front end and the rear end are buffered, meanwhile, the middle can be buffered, and bridge safety accidents caused after shock excitation are avoided.

Description

Technical Field

[0001] The present application relates to the technical field of bridge construction, and in particular to a vibration reduction structure of a cable-stayed bridge. Background Art

[0002] A cable-stayed bridge, also known as a cable-tensioned bridge, is a bridge in which the main beam is directly pulled onto the bridge tower by many cables. It is a structural system composed of pressure-bearing towers, tensioned cables and bending-bearing beams. A cable-stayed bridge is mainly composed of cable towers, main beams and inclined cables.

[0003] The cables of bridges are important load-bearing components. They are prone to vibration due to their small mass, stiffness and damping. Especially under the combined action of wind and rain, the probability of large-scale wind-rain-induced vibration of inclined cables is high. Once vibration occurs, it is easy to cause bridge safety accidents.

[0004] In actual use, the vibration reduction of the cable is mostly achieved by adding vibration dampers at both ends of the cable to weaken the generated vibration. However, the cables on the cable-stayed bridge are generally very long. The overall vibration of the cable cannot be completely limited only by the buffering of the dampers at the front and rear ends. When windy and rainy weather comes, the middle part of the cable will still vibrate, which can easily cause bridge safety accidents. For this reason, the present application provides a vibration reduction structure for a cable-stayed bridge. Utility Model Content

[0005] The purpose of the present application is to provide a vibration reduction structure for a cable-stayed bridge in order to solve the problem that when windy and rainy weather comes, the middle part of the cable will still vibrate, which may easily cause bridge safety accidents.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0007] A cable-stayed bridge vibration reduction structure comprises a bridge, wherein support columns are symmetrically fixedly connected to the bottom of the bridge, a bridge tower is fixedly connected to the top of the bridge, a diagonal stay 1 is fixedly installed on one side of the bridge tower, the other end of the diagonal stay 1 is fixedly connected to the top of the bridge, a plurality of straight stays 2 are evenly fixedly connected to the top of the bridge, one end of the plurality of straight stays 2 away from the bridge is connected to the diagonal stay 1, an auxiliary component is installed between the bridge tower and the diagonal stay 1, and a vibration reduction component is installed between the plurality of straight stays 2.

[0008] By adopting the above technical solution, when windy and rainy weather comes, strong winds will cause the diagonal brace member 1 to shake. At this time, the cooperation between the auxiliary components and the diagonal brace member 1 can greatly reduce the vibration of the diagonal brace member 1. At the same time, the pulling of multiple straight brace members 2 by multiple vibration-damping components also greatly reduces the vibration of the straight brace member 2, thereby effectively reducing the vibration of the diagonal brace member 1 and the straight brace member 2 to avoid vibration excitation that may cause bridge safety accidents.

[0009] Furthermore, a ventilation hole is opened at the top of the bridge tower, an embedded seat is fixedly connected to the top of the bridge, a plurality of embedded bolts are evenly threadedly connected to the embedded seat, and the bottom of the bridge tower is fixedly connected to the top of the embedded seat.

[0010] By adopting the above technical solution, the bridge tower is fixed on the embedded seat, and then the embedded seat is fixed by screwing a plurality of embedded bolts to prevent the bridge tower from tilting and shaking.

[0011] Furthermore, the inclined stay member 1 includes an inclined cable fixedly connected to the bridge tower, one end of the inclined cable away from the bridge tower is fixedly connected to the top of the bridge, a sleeve is fixedly connected to the outer wall of the inclined cable, and a plurality of damping springs 1 are evenly fixedly connected between the inclined cable and the sleeve.

[0012] By adopting the above technical solution, when the inclined cable vibrates, it will continuously hit the shock-absorbing spring 1 inside the sleeve. Through the buffering of multiple shock-absorbing springs 1, it is possible to avoid the inclined cable from vibrating drastically inside the sleeve and reduce the vibration amplitude of the inclined cable.

[0013] Furthermore, a plurality of air holes are evenly arranged on the sleeve.

[0014] By adopting the above technical solution, the airflow characteristics on the surface of the inclined cable can be changed through the air holes, the formation and shedding of vortices can be reduced, thereby reducing the probability and amplitude of vortex vibration, greatly alleviating the vibration situation.

[0015] Furthermore, the auxiliary component includes a fixed block fixedly connected to the bridge tower, a hinge seat is fixedly connected to the outer wall of the sleeve, a damper 1 is hinged in the hinge seat, and an end of the damper 1 away from the hinge end is fixedly connected to one end of the fixed block.

[0016] By adopting the above technical solution, the vibration amplitude can be reduced through the buffering of damper 1 when the sleeve vibrates. At the same time, the pulling of the front and rear ends of the sleeve by a pair of dampers can also avoid large-scale vibration of the sleeve.

[0017] Furthermore, the vibration reduction assembly includes a connecting tube fixedly connected to two outer walls of the plurality of straight pull members, a fixing plate fixedly connected to the connecting tube, a buffer member installed on one side of the fixing plate, and a connecting member symmetrically installed on one side of the fixing plate.

[0018] By adopting the above technical solution, through the cooperation of the buffer and the connecting member, the vibration generated by the inclined member 1 and the straight member 2 can be effectively mitigated, avoiding the occurrence of bridge safety accidents caused by vibration.

[0019] Furthermore, the buffer component includes a connection seat fixedly connected to one side of the fixing plate, and a damper 2 is hinged in the connection seat.

[0020] By adopting the above technical solution, the vibration generated between the adjacent straight pull members 2 can be mitigated by the damper 2 on one side of the fixed plate.

[0021] Furthermore, the connecting member includes two guide cylinders symmetrically fixedly connected to one side of the fixing plate, and the two guide cylinders are both fixedly connected with a second damping spring inside.

[0022] By adopting the above technical solution, the vibration generated by the second straight pull member can also be buffered through the extrusion and contraction of the guide cylinder.

[0023] In summary, the present application includes at least one of the following beneficial effects:

[0024] 1. The present application is provided with a vibration reduction assembly. When a plurality of straight pull members 2 vibrate, the connecting tube 1 will be driven to vibrate together. At this time, the vibration generated between the adjacent straight pull members 2 can be reduced through the damper 2 on one side of the fixed plate. At the same time, the vibration generated by the straight pull member 2 can be buffered by the extrusion and contraction of the guide tube. Through the cooperation of the auxiliary assembly and the vibration reduction assembly, the vibration generated by the inclined pull member 1 and the straight pull member 2 can be effectively reduced. While buffering the front and rear ends, the middle part can also be buffered to avoid bridge safety accidents caused by vibration excitation.

[0025] 2. The present application is provided with a diagonal cable. When the diagonal cable vibrates, it will continuously hit the vibration-damping spring 1 inside the sleeve. Through the buffering of multiple vibration-damping springs 1, it can avoid the diagonal cable from vibrating drastically inside the sleeve, and reduce the vibration amplitude of the diagonal cable. At the same time, wind force will pass through multiple air holes on the sleeve. The air holes can change the airflow characteristics on the surface of the diagonal cable, reduce the formation and shedding of vortices, thereby reducing the probability and amplitude of vortex vibration, and greatly alleviating the vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the device body in this application.

[0027] Figure 2 It is a cross-sectional view of the inclined brace member 1 in this application.

[0028] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0029] Figure 4 It is a three-dimensional structural schematic diagram of the vibration reduction assembly in this application.

[0030] Description of reference numerals:

[0031] 1. Bridge; 2. Support column; 3. Bridge tower; 4. Ventilation hole; 5. Inclined member 1; 6. Straight member 2; 7. Embedded seat; 8. Embedded bolt; 9. Auxiliary component; 10. Vibration reduction component; 51. Inclined cable; 52. Sleeve; 53. Vibration reduction spring 1; 54. Air vent; 91. Fixed block; 92. Articulated seat; 93. Damper 1; 101. Connecting cylinder; 102. Fixed plate; 103. Connecting seat; 104. Damper 2; 105. Guide cylinder; 106. Vibration reduction spring 2. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] An embodiment of the present application discloses a vibration reduction structure for a cable-stayed bridge.

[0034] Reference Figure 1 A cable-stayed bridge vibration reduction structure comprises a bridge 1, a support column 2 is symmetrically fixedly connected to the bottom of the bridge 1, a bridge tower 3 is fixedly connected to the top of the bridge 1, a diagonal stay 5 is fixedly installed on one side of the bridge tower 3, the other end of the diagonal stay 5 is fixedly connected to the top of the bridge 1, a plurality of straight stays 6 are evenly fixedly connected to the top of the bridge 1, one end of the plurality of straight stays 26 away from the bridge 1 is connected to the diagonal stay 5, an auxiliary component 9 is installed between the bridge tower 3 and the diagonal stay 5, a vibration reduction component 10 is installed between the plurality of straight stays 26, a vent 4 is opened on the top of the bridge tower 3, an embedded seat 7 is fixedly connected to the top of the bridge 1, a plurality of embedded bolts 8 are evenly threadedly connected to the embedded seat 7, and the bottom of the bridge tower 3 is fixedly connected to the top of the embedded seat 7.

[0035] During the construction of the bridge 1, the bridge tower 3 is first fixed on the embedded seat 7, and then the embedded seat 7 is fixed by screwing a plurality of embedded bolts 8, and then the inclined member 5 is fixed on the bridge 1 at an angle, and then a plurality of straight members 2 6 are fixed in turn and evenly between the bridge 1 and the inclined member 5. When windy and rainy weather comes, the strong wind will blow the inclined member 5 to shake. At this time, the vibration of the inclined member 5 can be greatly reduced through the mutual cooperation of the auxiliary component 9 and the inclined member 1 5. At the same time, the pulling of the plurality of straight members 2 6 by the plurality of vibration reduction components 10 also greatly reduces the vibration of the straight members 2 6, thereby effectively reducing the vibration of the inclined member 1 5 and the straight members 2 6 to avoid the occurrence of vibration excitation causing a safety accident of the bridge 1.

[0036] Reference Figure 1 and Figure 2 The inclined stay 5 includes an inclined cable 51 fixedly connected to the bridge tower 3, one end of the inclined cable 51 away from the bridge tower 3 is fixedly connected to the top of the bridge 1, a sleeve 52 is fixedly connected to the outer wall of the inclined cable 51, a plurality of damping springs 53 are evenly fixedly connected between the inclined cable 51 and the sleeve 52, and a plurality of air holes 54 are evenly opened on the sleeve 52.

[0037] During use, when strong wind blows towards the cable-stayed bridge, the wind will cause the cable 51 to vibrate. When the cable 51 vibrates, it will continuously hit the damping spring 53 inside the sleeve 52. The buffering of multiple damping springs 53 can prevent the cable 51 from vibrating drastically inside the sleeve 52, thereby reducing the vibration amplitude of the cable 51. At the same time, the wind will pass through multiple air holes 54 on the sleeve 52. The air holes 54 can change the airflow characteristics on the surface of the cable 51, reduce the formation and shedding of vortices, thereby reducing the probability and amplitude of vortex vibration, and greatly alleviating the vibration.

[0038] Reference Figure 1 and Figure 3 The auxiliary component 9 includes a fixed block 91 fixedly connected to the bridge tower 3, a hinge seat 92 fixedly connected to the outer wall of the sleeve 52, a damper 93 hinged in the hinge seat 92, and an end of the damper 93 away from the hinge end is fixedly connected to one end of the fixed block 91.

[0039] When in use, the damper 93 provides a buffer so that when the sleeve 52 vibrates, the vibration amplitude can be reduced. At the same time, the damper 93 pulls the front and rear ends of the sleeve 52, thereby preventing the sleeve 52 from vibrating significantly.

[0040] Reference Figure 1 and Figure 4 The vibration reduction assembly 10 includes a connecting tube 101 fixedly connected to the outer wall of a plurality of straight pull members 26, a fixing plate 102 is fixedly connected to the connecting tube 101, a buffer is installed on one side of the fixing plate 102, a connecting member is symmetrically installed on one side of the fixing plate 102, the buffer includes a connecting seat 103 fixedly connected to one side of the fixing plate 102, a damper 2 104 is hinged in the connecting seat 103, and the connecting member includes two guide tubes 105 symmetrically fixedly connected to one side of the fixing plate 102, and a vibration reduction spring 2 106 is fixedly connected inside the two guide tubes 105.

[0041] When windy and rainy weather comes, it will blow multiple straight-pull members 26 on the cable-stayed bridge to cause shaking and agitation. When multiple straight-pull members 26 shake, they will drive the connecting tube 101 to shake together. At this time, the damper 2 104 on one side of the fixed plate 102 can reduce the vibration generated between adjacent straight-pull members 26. At the same time, the extrusion and contraction of the guide tube 105 can also buffer the vibration generated by the straight-pull member 26. Through the cooperation of the buffer and the connecting member, the vibration generated by the inclined member 15 and the straight-pull member 26 can be effectively reduced to avoid the occurrence of vibration excitation and cause safety accidents of the bridge 1.

[0042] The implementation principle of the vibration reduction structure of a cable-stayed bridge in this embodiment is as follows: during the construction of the bridge 1, the bridge tower 3 is first fixed on the embedded seat 7, and then the embedded seat 7 is fixed by screwing a plurality of embedded bolts 8, and then the inclined member 5 is fixed on the bridge 1 at an angle, and then a plurality of straight pull members 6 are fixed between the bridge 1 and the inclined member 5 in sequence and uniformly. When a strong wind blows toward the cable-stayed bridge, the wind will blow the inclined cable 51 to vibrate. When the inclined cable 51 vibrates, it will continuously hit the vibration reduction spring 53 inside the sleeve 52. Through the buffering of the plurality of vibration reduction springs 53, the inclined cable 51 can be prevented from vibrating greatly inside the sleeve 52, and the vibration amplitude of the inclined cable 51 can be reduced. At the same time, the wind will pass through the plurality of air holes 54 on the sleeve 52. The air holes 54 can change the airflow characteristics on the surface of the inclined cable 51, reduce the formation and shedding of vortices, thereby reducing the probability and amplitude of vortex vibration, and greatly alleviating the vibration.

[0043] At the same time, the damper 93 acts as a buffer, so that when the sleeve 52 vibrates, the vibration amplitude can be reduced. At the same time, the pulling of the damper 93 can also prevent the sleeve 52 from vibrating greatly. The mutual cooperation between the damper 93 and the damping spring 53 can effectively reduce the vibration of the inclined member 5.

[0044] Secondly, when windy and rainy weather comes, the multiple straight-pull members 26 on the cable-stayed bridge will be blown to vibrate and agitate. When the multiple straight-pull members 26 vibrate, the connecting tube 101 will be driven to vibrate together. At this time, the damper 2 104 on one side of the fixed plate 102 can reduce the vibration generated between the adjacent straight-pull members 26. At the same time, the extrusion and contraction of the guide tube 105 can also buffer the vibration generated by the straight-pull member 26. Through the cooperation of the buffer and the connecting member, the vibration generated by the inclined member 15 and the straight-pull member 26 can be effectively reduced to avoid the occurrence of vibration and cause a safety accident of the bridge 1.

Claims

1. A cable-stayed bridge vibration reduction structure, comprising a bridge (1), characterized in that: The bottom of the bridge (1) is symmetrically fixedly connected to a support column (2), the top of the bridge (1) is fixedly connected to a bridge tower (3), one side of the bridge tower (3) is fixedly mounted with a diagonal brace member 1 (5), the other end of the diagonal brace member 1 (5) is fixedly connected to the top of the bridge (1), a plurality of straight brace members 2 (6) are evenly fixedly connected to the top of the bridge (1), one end of the plurality of straight brace members 2 (6) away from the bridge (1) is connected to the diagonal brace member 1 (5), an auxiliary component (9) is installed between the bridge tower (3) and the diagonal brace member 1 (5), and a vibration reduction component (10) is installed between the plurality of straight brace members 2 (6).

2. The cable-stayed bridge vibration reduction structure according to claim 1, characterized in that: A vent (4) is provided at the top of the bridge tower (3); an embedded seat (7) is fixedly connected to the top of the bridge (1); a plurality of embedded bolts (8) are evenly threadedly connected to the embedded seat (7); and the bottom of the bridge tower (3) is fixedly connected to the top of the embedded seat (7).

3. The cable-stayed bridge vibration reduction structure according to claim 1, characterized in that: The inclined stay member 1 (5) comprises an inclined cable (51) fixedly connected to the bridge tower (3), one end of the inclined cable (51) away from the bridge tower (3) is fixedly connected to the top of the bridge (1), a sleeve (52) is fixedly connected to the outer wall of the inclined cable (51), and a plurality of damping springs 1 (53) are evenly fixedly connected between the inclined cable (51) and the sleeve (52).

4. The cable-stayed bridge vibration reduction structure according to claim 3, characterized in that: The sleeve (52) is evenly provided with a plurality of air holes (54).

5. The cable-stayed bridge vibration reduction structure according to claim 3, characterized in that: The auxiliary component (9) comprises a fixed block (91) fixedly connected to the bridge tower (3); a hinge seat (92) is fixedly connected to the outer wall of the sleeve (52); a damper 1 (93) is hingedly connected inside the hinge seat (92); and an end of the damper 1 (93) away from the hinge end is fixedly connected to one end of the fixed block (91).

6. The cable-stayed bridge vibration reduction structure according to claim 1, characterized in that: The vibration reduction assembly (10) comprises a connecting tube (101) fixedly connected to the outer wall of a plurality of straight pull members (6), a fixing plate (102) fixedly connected to the connecting tube (101), a buffer member installed on one side of the fixing plate (102), and a connecting member symmetrically installed on one side of the fixing plate (102).

7. The cable-stayed bridge vibration reduction structure according to claim 6, characterized in that: The buffer component comprises a connection seat (103) fixedly connected to one side of the fixing plate (102), and a second damper (104) is hingedly connected in the connection seat (103).

8. The cable-stayed bridge vibration reduction structure according to claim 6, characterized in that: The connecting member comprises two guide cylinders (105) symmetrically fixedly connected to one side of the fixing plate (102), and a second damping spring (106) is fixedly connected inside the two guide cylinders (105).

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