CN-224213128-U - Stay cable tensioning compensation and vibration suppression device for large-span cable-stayed bridge

CN224213128UCN 224213128 UCN224213128 UCN 224213128UCN-224213128-U

Abstract

The utility model discloses a tension compensation and vibration suppression device for a stay cable of a large-span cable-stayed bridge, which comprises a tension compensation mechanism arranged at the end part of the stay cable, wherein the tension compensation mechanism is fixed on an anchor seat, a first vibration suppression mechanism and a second vibration suppression mechanism are arranged on the stay cable at intervals along the length direction of the stay cable, the first vibration suppression mechanism and the second vibration suppression mechanism are connected through a longitudinal adjustment mechanism, and the first vibration suppression mechanism is fixed on the anchor seat. The utility model can effectively improve the adaptability of the bridge to environmental changes, ensure the uniformity of the stress of the stayed cable, effectively control the deformation of the bridge, and prolong the service life of the bridge, thereby ensuring the operation efficiency and the safety of the stayed bridge. The utility model is suitable for the technical field of long-term safe operation and maintenance of the large-span cable-stayed bridge in bridge engineering.

Inventors

Yuan Aiqing
ZHENG TONGHUI
LIU YEXING
GAO QINGHAI
ZHANG JIANYU
WU HONGJIE
Rui Dongsheng
LIU BAOJUN
GAO JIAQI

Assignees

中国铁路设计集团有限公司

Dates

Publication Date: 20260508
Application Date: 20250418

Claims (10)

1. The tension compensation and vibration suppression device for the stay cable of the large-span cable-stayed bridge is characterized by comprising a tension compensation mechanism arranged at the end part of the stay cable, wherein the tension compensation mechanism is fixed on an anchor seat, a first vibration suppression mechanism and a second vibration suppression mechanism are arranged on the stay cable at intervals along the length direction of the stay cable, the first vibration suppression mechanism and the second vibration suppression mechanism are connected through a longitudinal adjustment mechanism, and the first vibration suppression mechanism is fixed on the anchor seat.
2. The device for tension compensation and vibration suppression of a cable-stayed bridge with a large span according to claim 1, wherein the tension compensation mechanism comprises a plurality of elastic tension components which are arranged between a disc-shaped fixing seat and a disc-shaped connecting seat, the elastic tension components are uniformly arranged along the circumferential direction of the cable-stayed bridge, the disc-shaped fixing seat is detachably connected with the anchoring seat, and the middle part of the disc-shaped connecting seat is connected with the end part of the cable-stayed bridge through a cable switching mechanism.
3. The device for tension compensation and vibration suppression of a stayed cable of a large-span cable-stayed bridge according to claim 2, wherein the elastic tension component comprises a first fixed seat and a second fixed seat which are oppositely arranged, a plurality of memory alloy springs are arranged between the first fixed seat and the second fixed seat, a plug rod is constructed on the first fixed seat, a plug pipe is constructed on the second fixed seat, one end of the plug rod is movably inserted into the plug pipe, an electric heating wire is arranged outside the plug pipe, the electric heating wire is connected with each memory alloy spring, and the first fixed seat and the second fixed seat are respectively detachably connected with the disc-shaped connecting seat and the disc-shaped fixed seat.
4. The device for tension compensation and vibration suppression of a stayed cable of a large-span cable-stayed bridge according to claim 3, wherein the disc-shaped fixing seat is provided with a plurality of lower assembly openings, each second fixing seat is detachably assembled at the corresponding lower assembly opening, a plurality of fixing lugs are uniformly constructed on the disc-shaped fixing seat along the circumferential direction of the disc-shaped fixing seat, each fixing lug is detachably connected with the anchor seat, the disc-shaped connecting seat is provided with a plurality of upper assembly openings, and each first fixing seat is detachably assembled at the corresponding upper assembly opening.
5. The device for tension compensation and vibration suppression of the stay cable of the large-span cable-stayed bridge according to claim 2, wherein the disc-shaped fixing seat and the disc-shaped connecting seat are sleeved with tubular telescopic covers, a first set of edges and a second set of edges are respectively formed at two ends of the tubular telescopic covers, a first fixing edge and a second fixing edge are respectively formed at the outer edges of the disc-shaped connecting seat and the disc-shaped fixing seat, and the first set of edges and the second set of edges are respectively sleeved and fixed outside the first fixing edge and the second fixing edge.
6. The device for tension compensation and vibration suppression of a cable-stayed bridge with a large span according to claim 2, wherein the cable-stayed switching mechanism comprises a cylindrical leading-in body and a truncated cone-shaped fixing body, a plurality of wire holes are uniformly formed in the leading-in body along the circumferential direction of the leading-in body, two ends of each wire hole respectively extend out of the leading-in body and the fixing body, the cable-stayed comprises a plurality of cable bodies which are circumferentially arranged, one end of each cable body penetrates out of the fixing body through the wire holes, a locking nut is connected to the cable body in a threaded manner, and the locking nut is screwed on the end face of the fixing body, which is far away from the leading-in body.
7. The device for tension compensation and vibration suppression of a cable-stayed bridge of claim 6, wherein a tightening sleeve is fixedly sleeved on the cable-stayed bridge, the tightening sleeve is close to the cable-switching mechanism, and a plurality of cable bodies forming the cable-stayed bridge are tightly bound in the tightening sleeve.
8. The device for tension compensation and vibration suppression of a stayed cable of a large-span cable-stayed bridge according to claim 1, wherein the first vibration suppression mechanism comprises a first elastic tension net sleeved outside the stayed cable and movably connected with the stayed cable, a plurality of first cable-stayed members are uniformly connected to the circumference of the first elastic tension net, one end of each first cable-stayed member, which is far away from the first elastic tension net, is hinged with a first assembly seat, and the first assembly seat is fixed on an anchoring seat.
9. The device for tension compensation and vibration suppression of a cable-stayed bridge with a large span according to claim 8, wherein the second vibration suppression mechanism comprises a second elastic tension net sleeved outside the cable-stayed bridge and movably connected with the cable-stayed bridge, the second elastic tension net has the same structure as the first elastic tension net, a plurality of second cable-stayed pieces are uniformly connected in the circumferential direction of the second elastic tension net, and a second assembly seat is hinged at one end of each second cable-stayed piece far away from the second elastic tension net.
10. The device for tension compensation and vibration suppression of a stayed cable of a large-span cable-stayed bridge according to claim 9, wherein the longitudinal adjusting mechanism comprises a plurality of longitudinal screw rods, each longitudinal screw rod is in threaded connection with a corresponding first assembly seat, one end of the longitudinal screw rod is in rotary connection with a corresponding second assembly seat, and an operation hand wheel is arranged at the other end of the longitudinal screw rod.

Description

Stay cable tensioning compensation and vibration suppression device for large-span cable-stayed bridge Technical Field The utility model belongs to the technical field of bridge engineering and structural vibration control, and particularly relates to a tension compensation and vibration suppression device for a stay cable of a large-span cable-stayed bridge. Background In the field of modern bridge engineering, a large-span cable-stayed bridge is taken as an important bridge structural form and is widely applied to bridge construction crossing large rivers and important transportation hubs. The cable-stayed bridge connects the bridge deck and the tower through the stay cable, so that the bridge can span a larger distance without intermediate support. Stay cables are key bearing components of cable-stayed bridges, and the stress state of the stay cables is directly related to the overall performance and safety of the bridge. Stay cables need to withstand significant tensile forces to maintain deck stability and load bearing capacity. Meanwhile, the stay cable must also have enough flexibility to adapt to deformation of the bridge under different loads and environmental conditions. However, due to the great structural complexity and flexibility of the large-span cable-stayed bridge, the cable-stayed bridge is extremely sensitive to external environmental factors (such as temperature change and wind force action), and the cable-stayed bridge is easy to cause remarkable change of tension stress and vibration. The influence of temperature change on the stay cable is mainly reflected on the expansion and contraction effect. When the temperature increases, the stay cable expands, resulting in an increase in length, and when the temperature decreases, the stay cable contracts, resulting in a decrease in length. Such a change in length may cause fluctuation in the internal stress of the stay cable, which may cause the stay cable to be excessively stretched or loosened, thereby affecting the structural stability of the bridge. Severe temperature changes can also cause the stay cable to undergo repeated stress cycles, increasing the risk of fatigue damage, gradually reducing the load carrying capacity of the stay cable, and possibly even causing breakage. In addition, temperature changes may affect the mechanical properties of the stay cable material, for example, high temperatures may decrease the strength and stiffness of the metal material, and low temperatures may increase the brittleness of the material. Changes in humidity and other environmental factors (such as salt spray and contaminants) associated with temperature changes can also lead to corrosion and aging of the stay cable, further affecting its service life and safety. Under the action of wind force, the stay cable is easy to generate flutter. The wind-induced vibration not only affects the stability of the stay cable, but also causes fatigue damage of the stay cable, and shortens the service life. Dynamic response caused by wind-induced vibration is transmitted to the whole bridge structure, and uneven deformation and structural vibration of the bridge deck can be caused, so that the driving comfort level and the long-term durability of the bridge are affected. Disclosure of Invention The utility model provides a stay cable tensioning compensation and vibration suppression device for a large-span cable-stayed bridge, which is used for improving the adaptability of the bridge to environmental changes, ensuring the uniformity of stress of the stay cable, effectively controlling the deformation of the bridge, prolonging the service life of the bridge and further ensuring the operation efficiency and safety of the cable-stayed bridge. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: The tension compensation mechanism is fixed on the anchor seat, a first vibration suppression mechanism and a second vibration suppression mechanism are arranged on the stay cable at intervals along the length direction of the stay cable, the first vibration suppression mechanism and the second vibration suppression mechanism are connected through a longitudinal adjusting mechanism, and the first vibration suppression mechanism is fixed on the anchor seat. Further, stretch-draw compensation mechanism is including installing a plurality of elasticity stretch-draw subassemblies between disc fixing base and disc connecting seat, and these elasticity stretch-draw subassemblies evenly set up along the circumference of stay cable, and disc fixing base and anchor seat detachable connection, and the middle part of disc connecting seat passes through cable switching mechanism and stay cable's end connection. Further, the elastic tensioning assembly comprises a first fixing seat and a second fixing seat which are oppositely arranged, a plurality of memory alloy springs are arranged between the first fixing seat and the second fixing