CN109235229A - Lever damping unit and cable-stayed bridge equipped with lever damping unit - Google Patents
Lever damping unit and cable-stayed bridge equipped with lever damping unit Download PDFInfo
- Publication number
- CN109235229A CN109235229A CN201811044945.8A CN201811044945A CN109235229A CN 109235229 A CN109235229 A CN 109235229A CN 201811044945 A CN201811044945 A CN 201811044945A CN 109235229 A CN109235229 A CN 109235229A
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- lever
- damping unit
- suspension cable
- cable
- rotating shaft
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of lever damping unit and the cable-stayed bridge equipped with lever damping unit, it is related to the controlling of vibration technical field, lever damping unit is in equalising torque state centered on the second shaft of fixed setting always in the present invention.When suspension cable in plane vibration, the vibration of suspension cable is transferred directly to the first damping unit by the first lever and is transferred to the second damping unit, effectiveness in vibration suppression in realization face after driving the second lever rotation by the first lever.When suspension cable out-of-plane vibration, the vibration of suspension cable is transferred to the first damping unit after amplifying by face outer lever, realizes effectiveness in vibration suppression outside face.The present invention installs speed lockup's device between suspension cable and lever damping unit, realize that the construction stage with regard to mountable lever damping unit and plays damping effect, and in no matter constructing or being installed rear lever damping unit of the invention is able to maintain equalising torque state.
Description
Technical field
The present invention relates to the controlling of vibration technical fields, and in particular to a kind of lever damping unit and lever is housed
The cable-stayed bridge of damping unit.
Background technique
Cable-stayed bridge is one of main bridge type of Large Span Bridges, and suspension cable is the main bearing member of cable-stayed bridge, due to oblique
Drag-line is made of elongated high-tensile steel wires, has many characteristics, such as that flexibility is big, initial damping ratio is small, with the increasing of cable-stayed bridge span
Add, Inclined Cable Vibration problem caused by wind, driving etc. is more prominent.The vibration of suspension cable frequently results in anchor head region steel construction
Fatigue cracking, the fatigue damage and stress corrosion for causing suspension cable, bring structure safety problem very serious.
Using the vibration of external suspension cable Damper Control suspension cable, the extensive of engineering circles and academia has been obtained
Approve, but select one kind can in suspension cable face (in suspension cable curve plane, hereinafter referred to as in face) and outside face (perpendicular to
Plane where suspension cable line of deflection, hereinafter referred to as outside face) damping unit of effective additional damping is provided, still there is certain be stranded
Difficulty, and with the increase of drag-line, landscape requirement, the reduction of damper relative mounting location, the reduction of damper support stiffness etc.
Problem all affects the effectiveness in vibration suppression of damper to a certain extent.The MR damper as used by certain Yangtze Bridge, only
Can control the in plane vibration of suspension cable by a relatively large margin, in suspension cable face in plane vibration a little and out-of-plane vibration can not effectively control
System.
In addition, general suspension cable damper is due to the big amplitude variation between can not adapting to Suo Liang caused by construction and secondary dead load
Position, can only be installed after Surfacing Construction terminates.But being installed from suspension cable to Surfacing Construction terminates
This section of construction period, the vibration of suspension cable be also it is very serious, but cannot effectively inhibit, the initial stage of suspension cable is caused to damage
Wound.
Summary of the invention
In view of the deficiencies in the prior art, it the purpose of the present invention is to provide a kind of lever damping unit and is equipped with
The cable-stayed bridge of lever damping unit meets the needs of vibration damping outside in long span stayed-cable bridge suspension cable face and face.
To achieve the above objectives, the technical solution adopted by the present invention is that: a kind of lever damping unit is used for suspension cable
Vibration damping comprising:
First lever, first lever one end are equipped with the interconnecting piece for connecting with suspension cable, and first lever
The other end is equipped with the first damper, the first lever rotation connection first rotating shaft, and first damper is provided in institute
When stating the first lever around first rotating shaft rotation and damping force is generated when the first lever upper and lower displacement；
Second lever, second lever one end are connected with the first rotating shaft, the second lever other end connection the
Two dampers, the second lever rotation second shaft of connection, second shaft and the first rotating shaft interval are arranged, described
Second damper is provided in when second lever is rotated around the second shaft and generates damping force.
Based on the above technical solution, the interconnecting piece includes speed lockup's device, and first lever passes through described
Speed lockup's device connects suspension cable；When speed lockup's device speed of related movement is smaller, speed lockup's device is not locking state；
When the speed of related movement of speed lockup's device is larger, speed lockup's device is changed into locking state.
Based on the above technical solution, the first rotating shaft is set at 2/3rds height of the first lever.
Based on the above technical solution, the first rotating shaft is deep groove ball bearing.
The invention also discloses a kind of cable-stayed bridge equipped with lever damping unit, the lever damping unit includes:
First lever, first lever one end are equipped with the interconnecting piece connected with suspension cable, and the other end is equipped with the first damping
Device, the first lever rotation connects first rotating shaft and the first rotating shaft original state is located in suspension cable face, and described first
Generate when damper is provided in first lever around first rotating shaft rotation and when the first lever upper and lower displacement damping
Power；
Second lever, second lever one end are connected with the first rotating shaft, and the other end connects the second damper, described
Second lever rotation the second shaft of connection, second lever rotation the second shaft of connection, the second shaft fixed setting and
Outside suspension cable face, second damper, which is provided in, generates damping when second lever is rotated around the second shaft
Power.
Based on the above technical solution, the interconnecting piece includes speed lockup's device, and first lever passes through described
Speed lockup's device connects suspension cable；When speed lockup's device speed of related movement is smaller, speed lockup's device is not locking state；
When the speed of related movement of speed lockup's device is larger, speed lockup's device is changed into locking state.
Based on the above technical solution, the interconnecting piece further includes cord clip, cord clip anchor ear and pin shaft, the cord clip with
Suspension cable is fixed, and the cord clip is connect with cord clip anchor ear by pin shaft, and cord clip anchor ear lower end and speed lockup's device are solid
Fixed connection.
Based on the above technical solution, the first rotating shaft is set at 2/3rds height of the first lever.
Based on the above technical solution, the first rotating shaft is deep groove ball bearing.
Based on the above technical solution, second shaft is fixed on the support for being set to bridge floor, the support
Lower section is equipped with pedestal diagonal brace, and the support is fixed on bridge floor by the pedestal diagonal brace.
Compared with the prior art, the advantages of the present invention are as follows:
Lever damping unit is in equalising torque state centered on the second shaft of fixed setting always in the present invention.
When suspension cable in plane vibration, the vibration of suspension cable is transferred directly to the first damping unit by the first lever and passes through the first lever
The second damping unit, effectiveness in vibration suppression in realization face are transferred to after driving the second lever rotation.When suspension cable out-of-plane vibration, suspension cable
Vibration amplified by face outer lever after be transferred to the first damping unit, realize effectiveness in vibration suppression outside face.
The present invention installs speed lockup's device between suspension cable and lever damping unit, and speed lockup's device is opposite
It is not locking state when moving small speed, damping force very little, due to adjusting rope, load, deck paving etc. to draw when adapting to the construction stage
Change in location between the cord clip risen and damping unit main body；And when wind load causes inhaul cable vibration, speed of related movement compared with
It is locking state when big, the vibration displacement transfer of suspension cable gives lever damping unit, plays the damping of lever damping unit
It acts on to control the vibration of drag-line.The lever damping unit construction stage of the present invention concurrently waves cushioning effect, and nothing with regard to mountable
Equalising torque state is able to maintain by rear lever damping unit of the invention is still installed in construction.
Detailed description of the invention
Fig. 1 is the diagrammatic cross-section of lever damping unit in the embodiment of the present invention；
Fig. 2 is the stereoscopic schematic diagram of the cable-stayed bridge in the embodiment of the present invention equipped with lever damping unit；
Fig. 3 is that lever damping unit out-of-plane vibration in the cable-stayed bridge of lever damping unit is housed in the embodiment of the present invention
When working principle diagram；
Fig. 4 is that lever damping unit in plane vibration in the cable-stayed bridge of lever damping unit is housed in the embodiment of the present invention
When working principle diagram.
In figure: the first lever of 1-, 10- interconnecting piece, 101- speed lockup's device, 102- cord clip, 103- cord clip anchor ear, 104- pin
Axis, the first damper of 11-, 12- first rotating shaft, the second lever of 2-, the second damper of 21-, the second shaft of 22-, 3- suspension cable, 4-
Bridge floor, 5- support, the bottom 6- diagonal brace.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
Shown in Figure 1, the embodiment of the present invention provides a kind of lever damping unit, is used for suspension cable vibration damping, packet
It includes:
First lever, first lever one end is equipped with the interconnecting piece for connecting with suspension cable, and the first lever other end is set
There are the first damper, the first lever rotation connection first rotating shaft, the first damper is provided in the first lever around first rotating shaft
Damping force is generated when rotation and when the first lever upper and lower displacement；First rotating shaft is set at 2/3rds height of the first lever.First
Shaft is deep groove ball bearing.
Second lever, second lever one end are connected with first rotating shaft, the second lever other end the second damper of connection, and second
Lever rotation the second shaft of connection, the second shaft and first rotating shaft interval are arranged, and the second damper is provided in the second lever
Damping force is generated when around the rotation of the second shaft.
First damper and the second damper can be using high-damping rubber dampings, sticky shearing damping, oil damping, magnetic
The damping modes such as rheology damping.
Lever damping unit is in equalising torque state centered on the second shaft of fixed setting always in the present invention.
When suspension cable in plane vibration, the vibration of suspension cable is transferred directly to the first damping unit by the first lever and passes through the first lever
The second damping unit, effectiveness in vibration suppression in realization face are transferred to after driving the second lever rotation.When suspension cable out-of-plane vibration, suspension cable
Vibration amplified by face outer lever after be transferred to the first damping unit, realize effectiveness in vibration suppression outside face.
Interconnecting piece includes speed lockup's device, and the first lever connects suspension cable by speed lockup's device；Speed lockup's device is opposite
When movement velocity is smaller, speed lockup's device is not locking state；When the speed of related movement of speed lockup's device is larger, speed lockup
Device is changed into locking state.
The present invention installs speed lockup's device between suspension cable and lever damping unit, and speed lockup's device is opposite
It is not locking state when moving small speed, damping force very little, due to adjusting rope, load, deck paving etc. to draw when adapting to the construction stage
Change in location between the cord clip risen and damping unit main body；And when wind load causes inhaul cable vibration, speed of related movement compared with
It is locking state when big, the vibration displacement transfer of suspension cable gives lever damping unit, plays the damping of lever damping unit
It acts on to control the vibration of drag-line.The lever damping unit construction stage of the present invention concurrently waves cushioning effect, and nothing with regard to mountable
Equalising torque state is able to maintain by rear lever damping unit of the invention is still installed in construction.
Shown in Figure 2, the embodiment of the invention also discloses a kind of cable-stayed bridge equipped with lever damping unit, levers
Damping unit includes:
First lever, first lever one end are equipped with the interconnecting piece connected with suspension cable, and the other end is equipped with the first damper, the
One lever rotation connection first rotating shaft and first rotating shaft original state is located in suspension cable face, the first damper is provided in the
When one lever is rotated around first rotating shaft and damping force is generated when the first lever upper and lower displacement；
Second lever, second lever one end are connected with first rotating shaft, and the other end connects the second damper, the rotation of the second lever
The second shaft, the second lever rotation the second shaft of connection are connected, the second shaft is fixedly installed and is located at outside suspension cable face, the second resistance
Buddhist nun's device is provided in when the second lever is rotated around the second shaft and generates damping force.First rotating shaft is set to the first lever 2/3rds
At height.First rotating shaft is deep groove ball bearing.
Lever damping unit is in equalising torque state centered on the second shaft of fixed setting always in the present invention.
When suspension cable in plane vibration, the vibration of suspension cable is transferred directly to the first damping unit by the first lever and passes through the first lever
The second damping unit, effectiveness in vibration suppression in realization face are transferred to after driving the second lever rotation.When suspension cable out-of-plane vibration, suspension cable
Vibration amplified by face outer lever after be transferred to the first damping unit, realize effectiveness in vibration suppression outside face.
Interconnecting piece includes speed lockup's device, and the first lever connects suspension cable by speed lockup's device；Speed lockup's device is opposite
When movement velocity is smaller, speed lockup's device is not locking state；When the speed of related movement of speed lockup's device is larger, speed lockup
Device is changed into locking state.
The present invention installs speed lockup's device between suspension cable and lever damping unit, and speed lockup's device is opposite
It is not locking state when moving small speed, damping force very little, due to adjusting rope, load, deck paving etc. to draw when adapting to the construction stage
Change in location between the cord clip risen and damping unit main body；And when wind load causes inhaul cable vibration, speed of related movement compared with
It is locking state when big, the vibration displacement transfer of suspension cable gives lever damping unit, plays the damping of lever damping unit
It acts on to control the vibration of drag-line.The lever damping unit construction stage of the present invention concurrently waves cushioning effect, and nothing with regard to mountable
Equalising torque state is able to maintain by rear lever damping unit of the invention is still installed in construction.
Interconnecting piece further includes cord clip, and cord clip anchor ear and pin shaft, cord clip are fixed with suspension cable, and cord clip and cord clip anchor ear pass through pin
Axis connection, cord clip anchor ear lower end are fixedly connected with speed lockup's device.
Second shaft is fixed on the support for being set to bridge floor, and pedestal diagonal brace is equipped with below support, and support is oblique by pedestal
Support is fixed on bridge floor.
The specific working principle is as follows:
Shown in Figure 3, when out-of-plane vibration occurs for suspension cable, the face outer displacement of suspension cable is swung around first rotating shaft to be transmitted
To the first damper, since the distance L1 of the first damper centre distance first rotating shaft is greater than first rotating shaft to drag-line center
Distance l1, which is n1=L1/l1.By amplification outside the face, damped part in the first damper
It is greater than the vibration displacement of drag-line with the relative motion displacement of sticky material container, can effectively improve the effect of drag-line out-of-plane vibration control
Fruit.Compared with the cantilever design for being directly anchored to bridge floor, first rotating shaft is arranged substantially at the 2/3 of the first lever total height, is adjusted
The outer amplification factor n of nodal section1Reach 2 or so, reduces the reduction of effectiveness in vibration suppression outside face caused by deforming due to face support arm.
Shown in Figure 4, when in plane vibration occurs for suspension cable, on the one hand the displacement of drag-line is transferred directly to the first damping
At device, the in-plane displacement of another aspect drag-line drives the second lever to rotate around the second shaft, after the displacement equations of drag-line
It is transferred to the second damper, plays damping energy dissipation effect, amplification factor n in the face2=L2/l2, which can pass through structure
It makes and is adjusted, acted on by the displacement equations, the effect of in plane vibration control can be improved.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (10)
1. a kind of lever damping unit, is used for suspension cable vibration damping, characterized in that it comprises:
First lever (1), described first lever (1) one end are equipped with for the interconnecting piece (10) that connects with suspension cable, and described the
One lever (1) other end is equipped with the first damper (11), the first lever rotation connection first rotating shaft (12), first resistance
Buddhist nun's device (11) be provided in when first lever (1) rotates around first rotating shaft (12) and on first lever (1) it is the next
Damping force is generated when shifting；
Second lever (2), described second lever (2) one end are connected with the first rotating shaft (12), and second lever (2) is another
End connection the second damper (21), second lever rotation connection the second shaft (22), second shaft (22) with it is described
The setting of first rotating shaft (12) interval, second damper (21) are provided in second lever (2) around the second shaft
(22) damping force is generated when rotating.
2. a kind of lever damping unit as described in claim 1, it is characterised in that: the interconnecting piece (10) includes speed lock
Determine device (101), first lever connects suspension cable by speed lockup's device (101)；Speed lockup's device (101) phase
When smaller to movement velocity, speed lockup's device (101) is not locking state；The relative motion speed of speed lockup's device (101)
When spending larger, speed lockup's device (101) is changed into locking state.
3. a kind of lever damping unit as described in claim 1, it is characterised in that: the first rotating shaft (12) is set to described
At (51) 2/3rds height of first lever.
4. a kind of lever damping unit as described in claim 1, it is characterised in that: the first rotating shaft (12) is deep-groove ball
Bearing.
5. a kind of cable-stayed bridge equipped with lever damping unit, which is characterized in that the lever damping unit includes:
First lever (1), described first lever (1) one end are equipped with the interconnecting piece (10) that connects with suspension cable, and the other end is equipped with the
One damper (11), described first lever (1) rotation connection first rotating shaft (12) and the first rotating shaft (12) original state position
In in suspension cable face, when first damper (11) is provided in first lever (1) and rotates around first rotating shaft (12)
Damping force is generated when with the first lever (1) upper and lower displacement；
Second lever (2), described second lever (2) one end are connected with the first rotating shaft (12), the second damping of other end connection
Device (21), the second lever rotation connection the second shaft (22), the second lever (2) rotation connection the second shaft (22),
Second shaft (22) is fixedly installed and is located at outside suspension cable face, and second damper (21) is provided in described second
Lever (2) generates damping force when rotating around the second shaft (22).
6. a kind of cable-stayed bridge equipped with lever damping unit as claimed in claim 5, it is characterised in that: the interconnecting piece
It (10) include speed lockup's device (101), first lever connects suspension cable by speed lockup's device (101)；The speed
When degree lock (101) speed of related movement is smaller, speed lockup's device (101) is not locking state；Speed lockup's device
(101) when speed of related movement is larger, speed lockup's device (101) is changed into locking state.
7. a kind of cable-stayed bridge equipped with lever damping unit as claimed in claim 5, it is characterised in that: the interconnecting piece
It (10) further include cord clip (102), cord clip anchor ear (103) and pin shaft (104), the cord clip (102) and suspension cable (3) are fixed, institute
It states cord clip (102) and is connect with cord clip anchor ear (103) by pin shaft (104), cord clip anchor ear (103) lower end and the speed are locked
Determine device (101) to be fixedly connected.
8. a kind of cable-stayed bridge equipped with lever damping unit as claimed in claim 5, it is characterised in that: the first rotating shaft
(12) it is set at (51) 2/3rds height of the first lever.
9. a kind of cable-stayed bridge equipped with lever damping unit as claimed in claim 5, it is characterised in that: the first rotating shaft
It (12) is deep groove ball bearing.
10. a kind of cable-stayed bridge equipped with lever damping unit as claimed in claim 5, it is characterised in that: described second turn
Axis (22) is fixed on the support (5) for being set to bridge floor (4), is equipped with pedestal diagonal brace (6) below the support (5), the support
(5) it is fixed on bridge floor (4) by the pedestal diagonal brace (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811044945.8A CN109235229B (en) | 2018-09-07 | 2018-09-07 | Lever-type damping device and cable-stayed bridge with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811044945.8A CN109235229B (en) | 2018-09-07 | 2018-09-07 | Lever-type damping device and cable-stayed bridge with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109235229A true CN109235229A (en) | 2019-01-18 |
| CN109235229B CN109235229B (en) | 2020-05-12 |
Family
ID=65060166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811044945.8A Active CN109235229B (en) | 2018-09-07 | 2018-09-07 | Lever-type damping device and cable-stayed bridge with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109235229B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158465A (en) * | 2019-05-13 | 2019-08-23 | 中铁大桥科学研究院有限公司 | A kind of lever mass damping system controlling Inclined Cable Vibration |
| CN112227179A (en) * | 2020-09-30 | 2021-01-15 | 中铁大桥局集团有限公司 | Displacement amplification device for stay cable external damper and cable-stayed bridge |
| CN112963622A (en) * | 2021-02-22 | 2021-06-15 | 中国核动力研究设计院 | High-damping vibration reduction and isolation support for nuclear power pipeline |
| CN112984220A (en) * | 2021-02-22 | 2021-06-18 | 中国核动力研究设计院 | Vibration reduction and isolation hanging bracket for nuclear power pipeline |
| CN115262370A (en) * | 2022-08-24 | 2022-11-01 | 中铁桥研科技有限公司 | Three-lever mass damping device for stay cable |
| CN116150567A (en) * | 2023-04-21 | 2023-05-23 | 温州电力建设有限公司 | Optimization method of inhaul cable-lever rotation inertial-volume damper system in power transmission tower body |
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| CN203238543U (en) * | 2013-03-03 | 2013-10-16 | 区晓帆 | Stay cable vibration-resistant device with damper |
| CN203383146U (en) * | 2013-06-27 | 2014-01-08 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Stay cable swing lever quality damping system integrating eddy-current damping and friction damping |
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| CN102561184A (en) * | 2011-12-30 | 2012-07-11 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Vertical shock absorption device with external stayed cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158465A (en) * | 2019-05-13 | 2019-08-23 | 中铁大桥科学研究院有限公司 | A kind of lever mass damping system controlling Inclined Cable Vibration |
| CN110158465B (en) * | 2019-05-13 | 2024-01-26 | 中铁大桥科学研究院有限公司 | Lever quality damping system for controlling stay cable vibration |
| CN112227179A (en) * | 2020-09-30 | 2021-01-15 | 中铁大桥局集团有限公司 | Displacement amplification device for stay cable external damper and cable-stayed bridge |
| CN112963622A (en) * | 2021-02-22 | 2021-06-15 | 中国核动力研究设计院 | High-damping vibration reduction and isolation support for nuclear power pipeline |
| CN112984220A (en) * | 2021-02-22 | 2021-06-18 | 中国核动力研究设计院 | Vibration reduction and isolation hanging bracket for nuclear power pipeline |
| CN115262370A (en) * | 2022-08-24 | 2022-11-01 | 中铁桥研科技有限公司 | Three-lever mass damping device for stay cable |
| CN116150567A (en) * | 2023-04-21 | 2023-05-23 | 温州电力建设有限公司 | Optimization method of inhaul cable-lever rotation inertial-volume damper system in power transmission tower body |
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| Publication number | Publication date |
|---|---|
| CN109235229B (en) | 2020-05-12 |
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