CN209619825U - Suspension bridge damping rope - Google Patents
Suspension bridge damping rope Download PDFInfo
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- CN209619825U CN209619825U CN201920120501.1U CN201920120501U CN209619825U CN 209619825 U CN209619825 U CN 209619825U CN 201920120501 U CN201920120501 U CN 201920120501U CN 209619825 U CN209619825 U CN 209619825U
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- rope
- girder
- main rope
- suspension bridge
- damping
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- 238000013016 damping Methods 0.000 title claims abstract description 59
- 239000000725 suspension Substances 0.000 title claims abstract description 45
- 230000000694 effects Effects 0.000 claims description 10
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- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 3
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- 230000005284 excitation Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 2
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- 230000005484 gravity Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000010959 steel Substances 0.000 description 2
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- 230000005611 electricity Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229940074869 marquis Drugs 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a kind of suspension bridge damping ropes.The technical essential of the utility model is that it includes the damping rope device for being symmetrically installed, being connected between suspension bridge king-tower top and girder along suspension bridge span centre section；The damping rope device includes main rope and secondary rope, and secondary Suo Chuidu is larger, is mounted on the surface of main rope, and the upper end is connected with king-tower top, and lower end passes through secondary rope reset spring and is connected with girder；Main rope upper end is connected with king-tower top, main rope lower end around after being fixed on the fixed pulley on girder, pass sequentially through the reseting spring device being fixed on girder downwards and damper is connected with girder；It is connected between main rope and secondary rope by more sunpenders, so that main rope is from king-tower upper anchorage end to fixed pulley section near linear shape.The utility model utilize girder wind-induced vibration when and bridge tower vibration displacement, driving energy-consumption damper consume girder vibrational energy, so that girder be inhibited to vibrate.
Description
Technical field
The utility model belongs to suspension bridge antivibration area, and in particular to a kind of suspension bridge damping rope.
Background technique
Large-span suspension bridge may occur vortex-induced vibration etc. under high wind effect and substantially vibrate, and substantially vibration easily leads to bridge
Fatigue rupture, also easily lead to traffic accident.
Existing Longspan Bridge vibration damping mainly using tuning vibration damping, tune vibration damping principle be on girder by spring and
Damper connects a mass block, by rationally designing the quality of mass block, spring rate and damperparameters, makes to form tuning matter
It measures damper (TMD), as shown in Figure 1.In Fig. 1, m is the quality of mass block, and k is spring rate, and c is that damper damps, based on M
The quality of structure, k1 are the main rigidity of structure, and c1 is main structural damping, F be wind suffered by structure, fluid equal excitation load it is dynamic
Power part, F0For the amplitude of external excitation, ω is the frequency of external excitation, and t is the time.
When bridge generation is substantially vibrated, using resonance principle, i.e. the frequency of TMD is consistent with bridge frequency, makes TMD
It substantially vibrates, using the balance of shaking force extrinsic motivated of TMD, to inhibit the vibration of structure.The vibration attenuation mechanism of TMD determines it
It is only capable of carrying out vibration damping to the single-order frequency of bridge, when the frequency of TMD itself and structural vibration frequency departure, the amplitude of TMD is fast
Speed reduces, its effectiveness in vibration suppression is caused to decline rapidly.Meanwhile with the reduction of structural vibration frequency, inertia force is reduced rapidly, may
It is difficult to balance extrinsic motivated.Large-span suspension bridge not only has extremely low fundamental frequency, while the vibration of multistage frequency can occur, such as west
The vortex-induced vibration of marquis Men great Qiao (main span 1650m) is never controlled effectively.
Using energy-consumption damper (including various fluid dampers, frcition damper, rubber cushion assembly, metal damper, electricity
The dissipative cells such as eddy current retarder) mode of vibration damping is only capable of being mounted on the junction Ta Liang, mesh since damper size itself is small
It is preceding mainly to protect the tower beam that occur under severe earthquake action to collide with it.And for wind-induced vibrations such as the vortex-induced vibrations of girder, it is main
Beam shows as the vibration of multistage sine wave type, and the relative displacement of girder and bridge tower is very small, wave crest far from bridge tower, energy-consumption damper
Effect can not play, thus energy-consumption damper can not inhibit the wind-induced vibration of large-span suspension bridge.
Summary of the invention
The purpose of this utility model is that in view of the foregoing defects the prior art has, providing a kind of utilization girder charming appearance and behaviour vibration
When dynamic and the vibration displacement of bridge tower, driving energy-consumption damper consumes girder vibrational energy, thus the suspension bridge for inhibiting girder to vibrate
Damping rope.
The purpose of this utility model is realized by the following technical solutions: the suspension bridge damping rope, it is wrapped
Include the damping rope device for being symmetrically installed, being connected between suspension bridge king-tower top and girder along suspension bridge span centre section；The damping
Rope device includes main rope and secondary rope, and secondary Suo Chuidu is larger, is mounted on the surface of main rope, and the upper end is connected with king-tower top,
Lower end passes through secondary rope reset spring and is connected with girder；Main rope upper end is connected with king-tower top, and main rope lower end, which bypasses, is fixed on girder
On fixed pulley after, pass sequentially through the reseting spring device being fixed on girder and damper is connected with girder downwards；Main rope with
By more sunpender connections between secondary rope, so that main rope is from king-tower upper anchorage end to fixed pulley section near linear shape.
Specifically, the reseting spring device includes the pull rod connecting by upper connector with main rope lower end, it is located at upper company
It connects and is successively fixed with upper limit plate and lower limiting board on the girder under device, protection is fixed between upper limit plate and lower limiting board
Cylinder, pull rod activity are cased with main rope reset spring after the centre bore of upper limit plate, consolidate on the pull rod of main rope reset spring bottom end
It is connected with bearing plate, main rope reset spring is located in protection cylinder；The damper includes the damping being fixed on lower limiting board bottom surface
Device outer cylinder body passes through lower connector and pull rod lower end after the upper end activity of damper rod passes through the centre bore of lower limiting board
Connection.
Further, in order to inhibit damp Suo Benshen vibration, main rope of suspension bridge and main rope in the same side of suspension bridge
Between, between main rope of suspension bridge and secondary rope be connected with small damping rope, small damping rope, which is equipped with, damps rope vibration absorber；Along suspension cable
Between the longitudinally asymmetric axisymmetric both sides main rope of bridge, connecting strand connection is equipped between secondary rope.
Specifically, the damping rope vibration absorber includes the small damper and little spring being connected in parallel on small damping rope.
Further, the influence linear to girder of suspension bridge for the pretension for balancing damping rope, in girder of suspension bridge
Increase clump weight in box beam, so that the vertical force component of damping cable stretching power is equal with clump weight gravity.
The utility model have following innovative point and the utility model has the advantages that
(1) inhibit the substantially vibration of girder using bridge tower.
(2) using big sag, the little Suo power of secondary rope, multiple spot resilient suspension is carried out to main rope, makes main rope at lesser pre-
Near linear is kept under power, there is maximum tension stiffness.
(3) the big rigidity ratio for utilizing main rope and reset spring realizes that larger change occurs for reset spring when girder vibration
Shape, and main rope deformation is smaller.
(4) large deformation for utilizing reset spring, drives damper passive energy dissipation.
(5) using main rope of suspension bridge lesser vibration under high wind effect, increase between girder, the main rope of damping rope, secondary rope
Add elasticity, energy-consuming device, inhibits the damping possible oscillation crosswise of Suo Benshen.
(6) clump weight, the influence linear to girder of suspension bridge of balance damping rope pretension are utilized.
(7) pretension and damperparameters appropriate, it is ensured that main rope always guarantees tensioning state.
Detailed description of the invention
Fig. 1 is the schematic illustration of existing tuned mass damper (TMD).
Fig. 2 is schematic view of facade structure when the utility model embodiment is installed and used.
Fig. 3 be I in Fig. 2 at enlarged drawing.
Fig. 4 is the structural schematic diagram of upper connector in Fig. 3.
Fig. 5 is B-B sectional view in Fig. 4.
Fig. 6 is A-A cross-sectional view in Fig. 2.
Fig. 7 is the structural schematic diagram that rope vibration absorber is damped in Fig. 6.
Specific embodiment
The utility model will be further described with reference to the accompanying drawings and examples.
Referring to fig. 2 to Fig. 7, the suspension bridge damping rope of the present embodiment, it includes symmetrically pacifying along suspension bridge span centre section 1
The damping rope device (a set of damping rope device is only depicted in figure) fill, being connected between 2 top of suspension bridge king-tower and girder 3；In
Under high wind effect, girder may occur substantially to vibrate, and king-tower vibrates very little because of huge rigidity.Damping rope device includes main rope
4 and secondary rope 5, secondary 5 sag of rope is larger, is mounted on the surface of main rope 4, and the upper end is connected with 2 top of king-tower, and lower end passes through pair
Rope reset spring 6 is connected with girder 3；4 upper end of main rope is connected with 2 top of king-tower, and 4 lower end of main rope, which bypasses, to be fixed on girder 3
After fixed pulley 7, downwards passes sequentially through the reseting spring device being fixed on girder 3 and damper and be connected with girder 3；Main rope 4 with
It is connected between secondary rope 5 by more sunpenders 8, sunpender forms multiple spot resilient suspension, the tensioning of appropriate adjustment main rope, secondary rope to main rope
Power, so that main rope is from the anchored end on king-tower top to pulley segment near linear shape.
Referring to Fig. 3, reseting spring device includes the pull rod 10 being connect by upper connector 9 with 4 lower end of main rope, referring to fig. 4,
Fig. 5, upper connector 9 are one with centre bore 91 and multiple lateral opening 92 disks, and 10 upper end of pull rod passes through centre bore 91 and is used in combination
Nut is fixed, and the per share steel strand wires for the main rope 4 being made of multiply steel strand wires (or other high-intensitive, high rigidity materials) pass through side
Hole 92 is simultaneously fixed with anchorage.It is successively fixed with upper limit plate 11 and lower limiting board 12 on the girder 3 under upper connector 9,
Protection cylinder 13 is fixed between upper limit plate 11 and lower limiting board 12,10 activity of pull rod passes through the centre bore rear enclosure of upper limit plate 11
There is main rope reset spring 14, is fixed with bearing plate 15 on the pull rod 10 of 14 bottom end of main rope reset spring, main rope reset spring 14
In in protection cylinder 13；Under the action of pretightning force, main rope is in tension state, and main rope reset spring is in pressured state, approximate
The main rope of straight line descends the extensional rigidity (tangential rigidity) of anchored end close to straight line rigidity thereon because sag is small.Above and below girder
When vibration, on main rope anchored end between upper limit plate at a distance from generating period variation, due to main rope extensional rigidity much larger than master
Rope reset spring rigidity, and main rope pulling force and main rope return spring pressure is equal in magnitude, causes the variation of main rope length small, and
The length of main rope reset spring changes greatly, and the variation of main rope reset spring length shows as pull rod and girder (or limit plate)
Relative motion.Damper includes the damper outer cylinder body 16 being fixed on 12 bottom surface of lower limiting board, damper rod 17 it is upper
After end activity passes through the centre bore of lower limiting board 12, it is connect by lower connector 18 with 10 lower end of pull rod；Lower connector 18 is one
A axially longer nut, the upper end are connect with 10 lower thread of pull rod, and lower end and 17 threaded upper ends of damper rod connect
It connects.By connector connecting rod, main vibration of beam drives damper rod relative to damper movement of cylinder block, derives damping
Device consumes girder vibrational energy, so that girder be inhibited to vibrate.
Referring to Fig. 6, Fig. 7, in order to inhibit to damp the vibration of Suo Benshen, the same side of suspension bridge main rope of suspension bridge 19 with
Small damping rope 20 (the 1/100~1/ of a diameter of pair rope diameter is connected between main rope 4, between main rope of suspension bridge 19 and secondary rope 5
10), small damping rope 20 is equipped with damping rope vibration absorber 21；Along the symmetrical both sides main rope 4 of the longitudinally asymmetric axis 22 of suspension bridge it
Between, be equipped with connecting strand 23 between secondary rope 5 and connect.From figure 7, it is seen that damping rope vibration absorber 21 includes being connected in parallel in small damping
Small damper 24 (its damping force or damped coefficient be main rope damper 1/100~1/10) and 25 (its of little spring on rope 20
Stiffness coefficient is the 1/500~1/20 of main rope reset spring).
Referring to Fig. 1, pretension in order to the balance damping rope influence linear to girder of suspension bridge, in girder of suspension bridge 3
Increase clump weight 26 in box beam, so that the vertical force component of damping cable stretching power is equal with clump weight gravity.
It is a specific embodiment of the utility model above, there are also other possible equivalents or classes for the utility model
With modification, such as:
(1) damping Suo Caiyong covers more, asymmetric installation.
(2) same girder position uses a set of damping rope or any tricks.
(3) damping Suo Yiduan is connected with girder, and the other end connects ground, water-bed land.
(4) secondary rope is not added, directly using main rope of suspension bridge as secondary rope.
(5) change main push-towing rope and damp the main rope of rope, secondary rope connection type, or only to main rope vibration damping, or only to secondary rope vibration damping.
(6) add many places vibration absorber of damping rope oscillation crosswise.
(7) change main rope, girder and damper connection type.
(8) increase damper between secondary rope and girder.
(9) damping rope vibration damping is equally applicable to tall and slender structure or pylon.
Therefore, in the case where not changing the utility model basic conception, the transformation of any other technical equivalents or
Modification, all should belong to the protection scope of the utility model claims.
Claims (5)
1. a kind of suspension bridge damping rope, it is characterised in that: it include be symmetrically installed along suspension bridge span centre section, be connected to it is outstanding
Damping rope device between cable bridge king-tower top and girder；The damping rope device includes main rope and secondary rope, and secondary Suo Chuidu is compared with main rope
Sag is big, is mounted on the surface of main rope, and the upper end is connected with king-tower top, and lower end passes through secondary rope reset spring and girder phase
Even；Main rope upper end is connected with king-tower top, main rope lower end around after being fixed on the fixed pulley on girder, pass sequentially through fixation downwards
In on girder reseting spring device and damper be connected with girder；It is connected between main rope and secondary rope by more sunpenders, makes winner
Rope is from king-tower upper anchorage end to fixed pulley section near linear shape.
2. suspension bridge damping rope according to claim 1, it is characterised in that: the reseting spring device includes by upper
The pull rod that connector is connect with main rope lower end is successively fixed with upper limit plate and lower limit on the girder under upper connector
Plate, is fixed with protection cylinder between upper limit plate and lower limiting board, pull rod activity is cased with main rope after the centre bore of upper limit plate
Reset spring, bearing plate is fixed on the pull rod of main rope reset spring bottom end, and main rope reset spring is located in protection cylinder；The resistance
Buddhist nun's device includes the damper outer cylinder body being fixed on lower limiting board bottom surface, and the upper end activity of damper rod passes through lower limiting board
Centre bore after, connect by lower connector with pull rod lower end.
3. suspension bridge damping rope according to claim 1, it is characterised in that: the suspension bridge master in the same side of suspension bridge
Between cable and main rope, small damping rope is connected between main rope of suspension bridge and secondary rope, small damping rope is equipped with damping rope vibration absorber；
It is connected between the longitudinally asymmetric axisymmetric both sides main rope of suspension bridge, between secondary rope equipped with connecting strand.
4. suspension bridge damping rope according to claim 3, it is characterised in that: the damping rope vibration absorber includes parallel connection
The small damper and little spring being connected on small damping rope.
5. suspension bridge damping rope according to claim 1, it is characterised in that: increase in the box beam of girder of suspension bridge and match
Pouring weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920120501.1U CN209619825U (en) | 2019-01-23 | 2019-01-23 | Suspension bridge damping rope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920120501.1U CN209619825U (en) | 2019-01-23 | 2019-01-23 | Suspension bridge damping rope |
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| Publication Number | Publication Date |
|---|---|
| CN209619825U true CN209619825U (en) | 2019-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920120501.1U Expired - Fee Related CN209619825U (en) | 2019-01-23 | 2019-01-23 | Suspension bridge damping rope |
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| Country | Link |
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| CN (1) | CN209619825U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111827088A (en) * | 2020-08-06 | 2020-10-27 | 广州大学 | SMA prevents roof beam device that falls |
| CN112211468A (en) * | 2020-09-29 | 2021-01-12 | 温州市滨江建设投资有限公司 | Multiple harmonious mass damper |
| CN113445412A (en) * | 2021-07-26 | 2021-09-28 | 中铁桥研科技有限公司 | Vibration damper for controlling vortex-induced vibration of girder of large-span bridge |
| CN113638306A (en) * | 2021-08-20 | 2021-11-12 | 湖南科技大学 | Damping cable vibration damper for bridge suspender |
-
2019
- 2019-01-23 CN CN201920120501.1U patent/CN209619825U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111827088A (en) * | 2020-08-06 | 2020-10-27 | 广州大学 | SMA prevents roof beam device that falls |
| CN112211468A (en) * | 2020-09-29 | 2021-01-12 | 温州市滨江建设投资有限公司 | Multiple harmonious mass damper |
| CN113445412A (en) * | 2021-07-26 | 2021-09-28 | 中铁桥研科技有限公司 | Vibration damper for controlling vortex-induced vibration of girder of large-span bridge |
| CN113445412B (en) * | 2021-07-26 | 2022-05-13 | 中铁桥研科技有限公司 | Vibration damper for controlling vortex-induced vibration of girder of large-span bridge |
| CN113638306A (en) * | 2021-08-20 | 2021-11-12 | 湖南科技大学 | Damping cable vibration damper for bridge suspender |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191112 |
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| CF01 | Termination of patent right due to non-payment of annual fee |