CN205152793U - Oscillating bridge tower vibration vibration damper - Google Patents
Oscillating bridge tower vibration vibration damper Download PDFInfo
- Publication number
- CN205152793U CN205152793U CN201520937648.1U CN201520937648U CN205152793U CN 205152793 U CN205152793 U CN 205152793U CN 201520937648 U CN201520937648 U CN 201520937648U CN 205152793 U CN205152793 U CN 205152793U
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- bridge tower
- bridge
- damping device
- vibration
- steel strand
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Abstract
The utility model provides an oscillating bridge tower vibration vibration damper through hanging damping vibration damper, utilizes damping vibration damper's whipping effect, the energy of dissipation bridge tower vibration. The utility model discloses but can show the performance of shaking that improves the bridge tower, and the construction is simple, low in cost, the effect is obvious, and application prospect is wide in restraining the bridge tower vibration.
Description
Technical field
The utility model relates to a kind of bridge tower vibration-repressing device.
Background technology
Bridge, just progressively to Long span, light, soft future development, proposes higher, stricter requirement also to while making bridge become economy attractive in appearance structure design and construction safety.The wind resistance anti-seismic performance of bridge tower is faced with many tests, how to suppress the ring that the vibration of bridge tower becomes very important in bridge design person's work.
Existing many bridge towers press down vibration means can be summarized as three major types, that is: bridge tower structural measure, mechanical shock absorption measure and aerodynamic Measures.Wherein, bridge tower structural measure, by changing the mode such as bridge tower form or composition material, improves bridge tower structure fundamental frequency or damping ratio; Mechanical shock absorption measure mainly increases the damping of bridge tower by laying damper, part way complex structure, is difficult to change and cost is higher; But aerodynamic Measures mainly improves by the pneumatic section optimizing bridge tower king-post performance of shaking.
Utility model content
The purpose of this utility model is to provide a kind of swing type bridge tower vibration dampeners.
For achieving the above object, the utility model have employed following technical scheme:
Comprise multiple steel strand, described bridge tower upper end is fixed in one end of described steel strand, the other end of described steel strand is provided with damping device, described steel strand are by being arranged at the supporter supports outside described bridge tower, and the part that steel strand are positioned at below supporter makes the corresponding damping device be connected be in suspension status.
Above support is be arranged at the assembly pulley on bridge tower lower end operation platform or bridge floor, and one end of steel strand is fixed on described bridge tower top, and by steel strand through assembly pulley.Use assembly pulley as the object of supporter is: 1) support and change steel strand direction; 2) when bridge tower vibration cause damping device to swing time, steel strand and pulley room can produce relative sliding, frictional force between the two can dissipate a part of bridge tower vibrate energy.
The edge of described operation platform or bridge floor is provided with six assembly pulleys, wherein four assembly pulleys are between two along suitable bridge to layout, and two other assembly pulley is arranged along direction across bridge.
Adjacent object can not be encountered when suspension height rocks with damping device be advisable, for this reason, between the water surface that the suspension height of described damping device is crossed at described operation platform or bridge floor and bridge or ground.
Described damping device is hexahedron hollow-core construction, described hexahedron hollow-core construction is provided with the hole for increasing the gas-flow resistance in described hexahedron hollow-core construction motion process.
The beneficial effects of the utility model are embodied in:
Steel strand motion in the utility model can be drawn after bridge tower vibration, damping device is swung because of whipping effect, after damping device swings under gas-flow resistance and the frictional force effect between steel strand and supporter, the energy of most of bridge tower vibration can be dissipated.The utility model processing and fabricating is convenient, and construction is simple, cheap, reusable, has good effect to the vibration of suppression bridge tower.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the acceleration decay pattern (not arranging damping device) after bridge tower exciting;
Fig. 3 is the acceleration decay pattern (arranging damping device) after bridge tower exciting;
Fig. 4 is damping device structural representation;
In figure: 1 represents operation platform, 2 represent damping device, and 3 represent steel strand, and 4 represent bridge tower, and 5 represent hole.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is elaborated.
The utility model, for bridge tower vibration problem, hangs damping device 2 by steel strand 3 on bridge tower 4, suppresses bridge tower vibration, is specifically described as follows:
See Fig. 1, one end of steel strand 3 is fixed at bridge tower 4 top, the other end of steel strand 3 passes the assembly pulley of operation platform 1, damping device 2 is by between respective steel strand and the supported and suspended water surface (or ground) crossed at operation platform and bridge of assembly pulley, in order to avoid the damping device touching water surface (or ground), hinder and swing, usually damping device is extended to the upper 2m ~ 5m height of the water surface (or ground).These type of steel strand arrange six groups altogether, and correspondence arranges six place's assembly pulleys on operation platform 1, wherein, along suitable bridge to layout four groups of assembly pulleys, arrange two groups of assembly pulleys along direction across bridge, and six steel strand of six groups of assembly pulley correspondences support are that herringbone opens shape between two.
The damping device 2 installed at the other end of steel strand 3 is hexahedron (cuboid such as shown in Fig. 4 or square) hollow steel design.All punch in the hollow steel design of hexahedron other each face except end face, and each hole 5 is all along level to layout, and opposite side hole location staggers, and air-flow can not be run through by straight line.Perforate (namely the beating multiple hole) object of honeycomb coaly is to increase the gas-flow resistance of damping device post exercise, and (air-flow enters damping device from a side cavities, then flow out damping device from offside hole, thus increase gas-flow resistance).Bridge tower 4 can draw steel strand 3 after vibrating and move, damping device 2 is moved because of whipping effect, thus cause the vibration of damping device 2, dissipate the energy of most of bridge tower 4 vibration, if working space allows, also suitably can increase the quantity of damping device, quantity is more, and effectiveness in vibration suppression is better.
Physical object simulating test has been carried out at Chang An University's wind tunnel laboratory (Xi'an City, Shanxi Province):
1) modelling: adopt saw blade to make bridge tower model as core beam, outside by extruded sheet parcel simulation bridge tower profile, wherein saw blade can ensure that model has certain vibration performance, to meet requirement of experiment, the thin direction of saw blade is as the main direction of vibration of bridge tower, outside extruded sheet can ensure the rigidity of bridge tower model, so that closer to actual conditions.Utilize cystosepiment etc. to make the superstructure (girder) of bridges, bridge tower model to be fixed on certain thickness extruded sheet and to ensure the stability of model ground.According to the actual size of bridge model, produce damping device in proportion.In bridge floor outer, assembly pulley is installed, by rope, damping device is connected to bridge tower top and (six place's assembly pulleys are set, wherein, along suitable bridge to layout four groups of assembly pulleys, arrange two groups of assembly pulleys along direction across bridge, six ropes of six groups of assembly pulley correspondences support open shape in herringbone between two).
2) process of the test: arrange contrast test, does not install damping device for first group, installs damping device for second group.Fix acceleration transducer on the top of bridge tower, give the identical excitation that the bridge tower under two groups of test conditionss is certain simultaneously, gather experimental data.
3) result of the test: the acceleration attenuation process not arranging the bridge tower model of damping device is shown in Fig. 2.The acceleration attenuation process arranging the bridge tower model of damping device is shown in Fig. 3.According to the utility model, damping device is set at bridge tower as can be seen from Figures 2 and 3, the vibration of bridge tower can be effectively reduced.
According to vibration attenuation mechanism of the present utility model and simulated test, for the bridge in the bridge after being completed or construction, adopt the mode of above-mentioned suspension damping device all can play the effect suppressing bridge tower vibration.
Claims (5)
1. a swing type bridge tower vibration dampeners, it is characterized in that: comprise multiple steel strand (3), described bridge tower (4) upper end is fixed in one end of described steel strand (3), the other end of described steel strand (3) is provided with damping device (2), described steel strand (3) are by being arranged at the supporter supports in described bridge tower (4) outside, and the part that steel strand (3) are positioned at below supporter makes the corresponding damping device (2) be connected be in suspension status.
2. a kind of swing type bridge tower vibration dampeners according to claim 1, is characterized in that: above support is for being arranged at the assembly pulley on bridge tower (4) lower end operation platform (1) or bridge floor.
3. a kind of swing type bridge tower vibration dampeners according to claim 2, it is characterized in that: the edge of described operation platform (1) or bridge floor is provided with six assembly pulleys, wherein four assembly pulleys are between two along suitable bridge to layout, and two other assembly pulley is arranged along direction across bridge.
4. a kind of swing type bridge tower vibration dampeners according to claim 2, is characterized in that: the suspension height of described damping device (2) be positioned at that described operation platform (1) or bridge floor and bridge cross between the water surface or ground.
5. a kind of swing type bridge tower vibration dampeners according to claim 1, it is characterized in that: described damping device (2) is hexahedron hollow-core construction, described hexahedron hollow-core construction is provided with the hole (5) for increasing the gas-flow resistance in described hexahedron hollow-core construction motion process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520937648.1U CN205152793U (en) | 2015-11-20 | 2015-11-20 | Oscillating bridge tower vibration vibration damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520937648.1U CN205152793U (en) | 2015-11-20 | 2015-11-20 | Oscillating bridge tower vibration vibration damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205152793U true CN205152793U (en) | 2016-04-13 |
Family
ID=55688505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520937648.1U Expired - Fee Related CN205152793U (en) | 2015-11-20 | 2015-11-20 | Oscillating bridge tower vibration vibration damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205152793U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105274936A (en) * | 2015-11-20 | 2016-01-27 | 长安大学 | Vibration inhibition method and apparatus for controlling vibration of bridge tower |
| CN107858922A (en) * | 2017-10-21 | 2018-03-30 | 华北水利水电大学 | A kind of Bridge Seismic system and implementation |
| CN109505228A (en) * | 2018-11-22 | 2019-03-22 | 山东理工大学 | Overhanging beam damping device and control method |
| CN110475967A (en) * | 2017-02-21 | 2019-11-19 | 维斯塔斯风力系统有限公司 | Tower oscillation damper |
-
2015
- 2015-11-20 CN CN201520937648.1U patent/CN205152793U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105274936A (en) * | 2015-11-20 | 2016-01-27 | 长安大学 | Vibration inhibition method and apparatus for controlling vibration of bridge tower |
| CN110475967A (en) * | 2017-02-21 | 2019-11-19 | 维斯塔斯风力系统有限公司 | Tower oscillation damper |
| CN110475967B (en) * | 2017-02-21 | 2020-10-27 | 维斯塔斯风力系统有限公司 | Tower vibration damper |
| CN107858922A (en) * | 2017-10-21 | 2018-03-30 | 华北水利水电大学 | A kind of Bridge Seismic system and implementation |
| CN109505228A (en) * | 2018-11-22 | 2019-03-22 | 山东理工大学 | Overhanging beam damping device and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160413 Termination date: 20161120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |