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CN-122013655-A - Additional bridge guy cable or suspender vibration control device

CN122013655ACN 122013655 ACN122013655 ACN 122013655ACN-122013655-A

Abstract

The invention provides an additional bridge inhaul cable or suspender vibration control device, and belongs to the technical field of bridge engineering vibration control. The device comprises an additional vibration control assembly and a limiting and adjusting structure, wherein the additional vibration control assembly is wrapped on the outer circumference of a guy rope/suspender body and used for changing the cross-sectional shape of the guy rope or suspender, and the limiting and adjusting structure is arranged at one end or two ends of the additional vibration control assembly and used for limiting the end part of the additional vibration control assembly and can adjust the enclosing diameter and the enclosing tension of the additional vibration control assembly. The device is suitable for stay ropes or suspender structures of large-span bridges such as cable-stayed bridges, suspension bridges and arch bridges, can effectively inhibit wind-induced vibration, load excitation vibration and other types of vibration, and has the advantages of high suitability and convenient installation and maintenance.

Inventors

  • LI SHIQING
  • ZHOU ZHENG
  • HAN YAN
  • ZOU XINGXING
  • WANG YUXUAN
  • HU MENGYANG

Assignees

  • 长沙理工大学

Dates

Publication Date
20260512
Application Date
20260408

Claims (10)

  1. 1. An additional bridge guy rope or suspender vibration control device is characterized by comprising an additional vibration control component and a limit adjusting structure (4); the additional vibration control component is coated on the outer circumference of the inhaul cable/suspender body (1) and is used for changing the cross section shape of the inhaul cable or suspender; The limiting and adjusting structure (4) is arranged at one end or two ends of the additional vibration control assembly, is used for limiting the end part of the additional vibration control assembly, and can adjust the enclosing diameter and the enclosing tension of the additional vibration control assembly.
  2. 2. An attached bridge cable or boom vibration control device according to claim 1, characterized in that protrusions are formed on the outer surface of the cable/boom body (1) at axially spaced intervals by means of the attached vibration control assembly.
  3. 3. An attached bridge cable or boom vibration control device according to claim 1, characterized in that the attached vibration control assembly comprises a plurality of micro-bulges (101) axially spaced on the surface of the cable/boom body (1) and a zip-type vibration damping assembly (2) wrapped outside the plurality of micro-bulges (101).
  4. 4. An attached bridge cable or boom vibration control device according to claim 1, characterized in that the zipper-type vibration damping assembly (2) comprises two symmetrically arranged flexible zipper strips (1021) and damping units distributed over the zipper strips (1021); two zipper strips (1021) are enclosed and coated on the periphery of the part, with the micro bulge (101), of the inhaul cable/suspender body (1) through a meshing structure; the inner sides of the zipper strips (1021) are provided with clamping grooves matched with the micro-bulges (101) at the positions of the micro-bulges (101), after the two zipper strips (1021) are enclosed, the micro-bulges (101) are embedded into the corresponding clamping grooves, and anti-skid rubber pads (1023) are arranged in the clamping grooves.
  5. 5. An attached bridge cable or boom vibration control device as claimed in claim 4, wherein the damping unit comprises a cantilevered elastic damping member (1026) and a friction damping sheet (1027); The cantilever elastic damping pieces (1026) are axially arranged at intervals along the inhaul cable/suspender body (1) at the outer side of the zipper strip (1021), one end of each cantilever elastic damping piece (1026) is fixedly connected to the outer side surface of the zipper strip (1021), and the other end is a free end; The friction damping sheet (1027) is arranged between the anti-skid rubber pad (1023) and the micro bulge (101).
  6. 6. An additional bridge cable or boom vibration control device according to any of claims 3-5, wherein the micro-bulge (101) is integrally formed with or detachably connected to the cable/boom body (1).
  7. 7. An additional bridge cable or boom vibration control device according to any one of claims 3-5, wherein the micro-bulges (101) are hemispherical, the diameter is 1/5-1/3 of the diameter of the cable/boom body (1), and the axial spacing of adjacent micro-bulges (101) is 2-3 times the diameter of the micro-bulges (101).
  8. 8. An attached bridge cable or boom vibration control device according to claim 1, characterized in that the limit adjustment structure (4) comprises a connection lug plate and an adjustment bolt; The ends of the two zipper strips (1021) are oppositely provided with connecting lug plates, the adjusting bolts are in threaded fit with the two connecting lug plates, and the diameter and the tension of the closure of the two zipper strips are adjusted by tightening or loosening the adjusting bolts.
  9. 9. An attached bridge cable or boom vibration control device according to claim 8, wherein the limit adjustment structure (4) further comprises a tension sensor for monitoring the enclosure tension of the fastener tape (1021) in real time.
  10. 10. An attached bridge cable or boom vibration control device according to claim 1, characterized in that the cable or boom body (1) is fixedly connected with the bridge girder or tower by means of an end fixing structure; The end fixing structure comprises a hoop (1031) and a bracket (1032), wherein the hoop (1031) is sleeved at the end of the guy rope/suspender body (1), the bracket (1032) is fixedly connected with a bridge girder body or a tower column, and the hoop (1031) is connected with the bracket (1032) through an elastic connecting piece (1034).

Description

Additional bridge guy cable or suspender vibration control device Technical Field The invention relates to a vibration control device, in particular to an additional bridge inhaul cable or suspender vibration control device, and belongs to the technical field of bridge engineering vibration control. Background The inhaul cable and the suspender are core bearing members of the large-span bridge, have light weight and low damping, and are extremely easy to generate vortex-induced resonance, wake flow relaxation vibration, wind and rain excitation and other harmful vibrations under the external actions of wind and rain excitation, bridge deck traffic load, environmental pulsation and the like. The continuous vibration can lead to fatigue damage of the end joint of the inhaul cable and cracking of the protective sleeve, accelerates corrosion and aging of internal steel wires, and can cause inhaul cable failure when severe, so that the safety of a bridge structure and the service life of the bridge structure are endangered. The inhaul cable vibration control device commonly used in the current engineering mainly comprises two main types of damper type and pneumatic modification type. The damper type device (such as an oil pressure damper, a magneto-rheological damper, a steel wire rope damper and the like) dissipates vibration energy by providing additional damping, but has the defects of easiness in oil leakage, high maintenance cost, poor sensitivity to tiny vibration, high cost of the magneto-rheological damper and requirement for additional energy supply, and the traditional steel wire rope damper is mainly arranged in a plurality of units in a circumferential direction, is complex to install, has high overall rigidity and is easy to collapse in damping performance. The pneumatic modified device (such as the rib and the pit) optimizes the airflow field by changing the section shape of the inhaul cable, but the adopted scheme is that the section shape of the inhaul cable is changed during the production of the inhaul cable, the structural adaptability is poor, the vibration control requirements of inhaul cables with different diameters are difficult to be considered, and the modified structure is easy to damage. In the prior art, a vibration control device with the advantages of convenience in installation, damping adjustability, strong adaptability and good durability has not yet appeared. Especially, aiming at multidirectional vibration (in-plane, out-of-plane and axial direction) of a inhaul cable, the conventional device is single in inhibition effect and cannot realize full-dimensional vibration control. Therefore, the inhaul cable or suspender vibration control device which is simple in structure, convenient to install and maintain and comprehensive in vibration reduction effect is developed, and the inhaul cable or suspender vibration control device has important engineering practical value. Disclosure of Invention In view of the above, the invention provides an additional bridge guy or suspender vibration control device which is suitable for guy or suspender structures of large-span bridges such as cable-stayed bridges, suspension bridges and arch bridges, can effectively inhibit wind-induced vibration, load excitation vibration and other types of vibration, and has high adaptability and convenient installation and maintenance. The technical scheme of the invention is that the additional bridge guy rope or suspender vibration control device comprises an additional vibration control component and a limit adjusting structure; the additional vibration control component is coated on the outer circumference of the inhaul cable/suspender body and is used for changing the cross section shape of the inhaul cable or suspender; the limiting and adjusting structure is arranged at one end or two ends of the additional vibration control component, is used for limiting the end part of the additional vibration control component, and can adjust the enclosing diameter and the enclosing tension of the additional vibration control component. As a preferred mode of the invention, the protrusions which are distributed at intervals along the axial direction are formed on the outer surface of the guy rope/suspender body through the additional vibration control assembly. As a preferable mode of the invention, the additional vibration control assembly comprises a plurality of micro-bulges and a zipper-type vibration reduction assembly, wherein the micro-bulges are axially arranged on the surface of the guy rope/suspender body at intervals, and the zipper-type vibration reduction assembly is coated outside the micro-bulges. As a preferred mode of the present invention, the zipper-type vibration damping assembly comprises two symmetrically arranged flexible zipper strips and damping units distributed on the zipper strips; The two zipper belts are covered and coated on the periphery of the micro-bulge part of the inhaul cable/su