CN101660292B - Viscous vibration-absorption auxiliary rope device for cable-stayed bridge - Google Patents
Viscous vibration-absorption auxiliary rope device for cable-stayed bridge Download PDFInfo
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- CN101660292B CN101660292B CN2009100936557A CN200910093655A CN101660292B CN 101660292 B CN101660292 B CN 101660292B CN 2009100936557 A CN2009100936557 A CN 2009100936557A CN 200910093655 A CN200910093655 A CN 200910093655A CN 101660292 B CN101660292 B CN 101660292B
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- lazy halyard
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- stayed bridge
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Abstract
The invention relates to a viscous vibration-absorption auxiliary rope device for a cable-stayed bridge and belongs to the technical field of wind resistance as well as vibration resistance and vibration-absorption in bridge engineering. The auxiliary rope device comprises an auxiliary rope, a hoop connected with an external sleeve of a main stay cable, an external hoop of the auxiliary rope, a connecting screw rod and a connecting screw hole piece of the hoop connected with the external sleeve of the main stay cable, a viscous damper with two ends respectively connected with the auxiliary rope and a main beam of the bridge, as well as a connecting component connected with the damper and the auxiliary rope. The auxiliary rope is connected with the main cable of the cable-stayed bridge through the hoop and the screw connecting piece so as to form a new rope net system and improve the power property and air power property of the stay cable. Simultaneously, under the condition that the auxiliary rope generates deformation, the viscous damper carries out vibration absorption energy consumption so as to further decrease the vibration of the bridge, thus being specially suitable to energy consumption vibration absorption. The material is low in cost, the construction is simple and the effect is obvious.
Description
Technical field
The present invention relates to a kind of viscous vibration lazy halyard device that is used for cable stayed bridge, belong to bridge engineering wind resistance and antidetonation and cushion technique field.
Background technology
Cable stayed bridge is the tower by pressure-bearing, the rope of tension and hold a kind of structural system that curved beam body combines.Because cable stayed bridge is bigger than the span ability of beam bridge, in bridge construction, be widely used, be the main bridge type of Longspan Bridge.Characteristics such as cable stayed bridge is a kind of self-anchoring system, and having does not need expensive earth anchor, and integral rigidity and wind resistance are good, but add its span ability greatly cantilever construction, cost is low and characteristics such as good looking appearance.But along with the continuous increase of cable stayed bridge span, it is more and more longer that suspension cable becomes.As the suspension cable of the main supporting member of cable stayed bridge, it is wide that it is flexible greatly, internal damping is low, intrinsic frequency distributes, and very easily vibrates under the beam tower displacement effect of wind, wind and rain and supported end.
Cable-stayed bridge cable cause the mechanism of shaking in a minute complexity.According to the difference of driving source, the main oscillatory type of suspension cable can be divided into two classes: a class is the Inclined Cable Vibration that wind or wind and rain acting in conjunction cause, the another kind of vibration that takes place under beam tower displacement effect for the suspension cable supported end.At present, Passive Control is to suppress the main means of Inclined Cable Vibration, and major measure comprises: change the suspension cable surface configuration to change the dynamic characteristics of rope; Set up the passive damping device at the rope close end.To the suspension cable on the cable stayed bridge, use viscoelastic damper to be control appliance usually, the more viscoelastic damper of domestic and international application has oil damper and efficient rubber cushion assembly at present.Yet the Passive Control Inclined Cable Vibration is not the optimal selection of Inclined Cable Vibration control, and the ratio that the control effect that studies show that Passive Control and damper are grown apart from bitter end portion distance and rope is relevant, and ratio is big more, and to control effect good more.Because the restriction of suspension cable present position is attractive in appearance for not influencing bridge, damper is restricted apart from bitter end portion distance and the long ratio of rope.Thereby for long rope, the vibration that can't provide enough dampings to come control cord probably, thus Passive Control was lost efficacy.So cheap, the diverse in function of development cost, respond well vibration absorber has great engineering significance.
Summary of the invention
The present invention proposes a kind of viscous vibration lazy halyard device that is used for cable stayed bridge, this device has characteristics such as effectiveness in vibration suppression with low cost, comprehensive is obvious.Bear under high wind and the geological process at cable stayed bridge, this device can be combined to form rope net system with main suspension cable, increases the damping of suspension cable, improve integral power performance and air force character, dissipation energy effectively, the vibration that alleviates bridge main body, thus guarantee the applicability and the safety of bridge.
To achieve these goals, the present invention has taked following technical scheme.The present invention includes lazy halyard, be connected in each and tiltedly draw first cuff on the main rope outer sleeve, be fixed on and be used for second cuff and the viscous damper that lazy halyard passes on first cuff.Wherein: lazy halyard passes each second cuff successively and is serially connected in each and tiltedly draws between the main rope, and the one end is fixed on uppermost one and tiltedly draws on the main rope, and the other end is fixed on the cable-stayed bridge main-beam by viscous damper.Can slide second cuff and tiltedly draw relative deformation does not take place between the main rope outer sleeve between the lazy halyard and second cuff.
The diameter of described lazy halyard is for tiltedly drawing 0.2 to 0.5 times of main rope diameter, material with tiltedly draw main rope identical, the internal diameter of described second cuff is 1.0 to 1.2 times of lazy halyard diameter.
The structure of described first cuff is: two ring-like shaped steel of semicircle are fixed together by the bolt part, and the internal diameter of the ring-like shaped steel of semicircle is identical with the external diameter that tiltedly draws the main rope outer sleeve.On each first cuff, all be symmetrically fixed with two second cuffs.
A lazy halyard links to each other with three skew cables serial connection at least, and lazy halyard and suspension cable intersecting angle are generally 70 degree～110 degree, are advisable with both square crossing efficient.
The displacement range of described viscous damper is more than or equal to ± 3cm.
Described lazy halyard need apply pretension when installing, and does not occur negative pulling force in the time of will guaranteeing tiltedly to draw the main rope vibration in principle in the lazy halyard.
Compared with prior art, the present invention has the following advantages:
1) the present invention links to each other the original part suspension cable of lazy halyard and cable stayed bridge, forms a new rope web frame system.On the one hand, thereby lazy halyard has reduced the frequency that the effective length of suspension cable has promoted drag-line, and on the other hand, rope net system has changed original bridge dynamic characteristic and air force character.
2) the lazy halyard vibration reducing measure is specially adapted to the overlength guy system of large span stayed-cable bridge, to suppressing parametric vibration and linear internal resonance in dividing effectively.
3) the present invention adopts viscous damper and lazy halyard with good characteristic to form the heavy damping device, has further strengthened the energy-dissipating property of contrive equipment, especially is fit to the energy-dissipating and shock-absorbing under hurricane and the severe earthquake action.
4) the material therefor cost is very low, does not have complicated structure, and effect is obvious.
Description of drawings
Fig. 1 lazy halyard and tiltedly draw annexation three-dimensional side view between the main rope;
Fig. 2 viscous damper lateral view;
Fig. 3 lazy halyard part is along the main rope cross-sectional view;
Fig. 4 lazy halyard cross section view
Fig. 5 viscous damper phantom;
The unitary side view that Fig. 6 the present invention uses on cable stayed bridge;
Among the figure: 1, lazy halyard, 2, first cuff, 3, second cuff, 4, first shank of bolt, 5, first bolt hole, 6, viscous damper, 7, connecting elements, 8, tiltedly draw main rope, 9, tiltedly draw the main rope outer sleeve, 10, piston rod, 11, the fixing termination of viscous damper, 12, sealing plate, 13, liquid silicone oil, 14, the piston head of band throttle orifice, 15, control valve, 16, regulate to support, 17, conditioning chamber, 18, outer wall cylindrical shell, 19, the cable stayed bridge king-tower, 20, cable-stayed bridge main-beam.
The specific embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing.
As shown in Figure 1, present embodiment mainly comprise lazy halyard 1, with first cuff 2 that tiltedly draws the main rope outer sleeve to link to each other, be fixed on and be used for second cuff 3 and the viscous damper 6 that lazy halyard passes on first cuff 2.Wherein: outer sleeve is enclosed within the outside of tiltedly drawing main rope, two ends with tiltedly draw the main rope end anchorage.Lazy halyard 1 passes each second cuff 3 successively and is serially connected in each and tiltedly draws between the main rope, the one end is fixed on uppermost one and tiltedly draws on the main rope, the other end links to each other with the piston rod of viscous damper by connecting elements 7, the fixedly termination 11 of viscous damper is anchored with cable-stayed bridge main-beam, as Fig. 2, shown in Figure 5.The displacement range of viscous damper must not be less than ± 3cm, and the viscous liquid of viscous damper 6 inside can be liquid-state silicon oil, mineral oil and lead etc.
On each first cuff 2, all be symmetrically fixed with two second cuffs 3, as shown in Figure 3, Figure 4, first cuff 2 with tiltedly draw main rope to be arranged vertically, second cuff 3 and first cuff 2 are arranged in parallel, and so just guarantee lazy halyard 1 and tiltedly draw between the main rope to be arranged vertically.First cuff 2 is two ring-like shaped steel of semicircle in the present embodiment, and semi-round ring shape shaped steel is provided with 5, two shaped steel in connecting bolt hole by first shank of bolt 4 and 5 butt joints of first bolt hole, will tiltedly draw main rope outer sleeve banding.Be weldingly connected with first cuff 2 that tiltedly draws the main rope outer sleeve to link to each other and outside second cuff 3 of lazy halyard simultaneously, thereby guarantee second cuff 2 and lazy halyard 1 compatible deformation.The internal diameter of the ring-like shaped steel of semicircle is identical with the external diameter that tiltedly draws the main rope outer sleeve in the present embodiment.
The mechanism of connecting elements 7 is: two ends also clamp with lazy halyard end and piston rod end anchoring respectively.
The lazy halyard diameter is for tiltedly drawing 0.35 times of main rope diameter in the present embodiment, material with tiltedly draw main rope consistent or similar.The internal diameter of the outside cuff of lazy halyard is 1.1 times of lazy halyard diameter.
As shown in Figure 6, a lazy halyard links to each other with three skew cables serial connection at least, and lazy halyard and suspension cable intersecting angle are that 85 degree are to 100 degree.
Suitably strain when lazy halyard is installed, do not occur negative pulling force in the time of should guaranteeing the main rope vibration in principle in the lazy halyard.
Lazy halyard 1 is connected with the cable stayed bridge main rope by first cuff 2, second cuff 3 in the present embodiment, forms new rope net system, has improved the dynamic characteristics and the air force character of suspension cable.Viscous damper 6 carries out oscillation damping and energy dissipating, the vibration that further alleviates bridge under the situation that lazy halyard deforms simultaneously.
The mounting method of present embodiment is as follows:
At first, according to lazy halyard 1 concrete installation site, determine the length of lazy halyard 1, the performance parameter and the installation site of the cuff number, associated fitting number and the viscous damper 6 that link to each other with the outer sleeve 9 that tiltedly draws main rope.Principle is: a lazy halyard links to each other with three skew cables serial connection at least, and lazy halyard 1 is advisable with both square crossing efficient with suspension cable 8 intersecting angles.Secondly, according to along tiltedly drawing king-tower 19 direction from top to bottom, successively with second cuff 3 with lazy halyard 1 pierce into, banding.Afterwards, use with second cuff 2 that tiltedly draws the main rope outer sleeve to link to each other, connecting bolt bar 4, connecting bolt hole part 5 with lazy halyard 1 with tiltedly draw the outer sleeve 9 of main rope to couple together.Requirement guarantees that lazy halyard 1 and main suspension cable outer sleeve 9 are combined to form rope net system, guarantee both compatible deformations.Afterwards, lazy halyard 1 is linked to each other with the piston rod 10 of viscous damper by connecting elements 7 near girder one end, require lazy halyard is suitably applied pretension, do not occur negative pulling force in the time of should guaranteeing the main rope vibration in principle in the lazy halyard.With viscous damper 6 terminal and girder 20 anchorings, guarantee not take place relative deformation between the two at last.
Claims (7)
1. viscous vibration lazy halyard device that is used for cable stayed bridge is characterized in that: comprise lazy halyard (1), be connected in each and tiltedly draw outer all being fixed with of first cuff (2), each first cuff (2) on the main rope outer sleeve to be used for second cuff (3) and the viscous damper (6) that lazy halyard passes; Wherein: lazy halyard (1) passes second cuff (3) and is serially connected in each and tiltedly draws between the main rope, and an end of lazy halyard (1) is fixed on uppermost one and tiltedly draws on the main rope, and the other end is fixed on the cable-stayed bridge main-beam by viscous damper (6).
2. a kind of viscous vibration lazy halyard device that is used for cable stayed bridge according to claim 1 is characterized in that: all be symmetrically fixed with two second cuffs (3) on each first cuff (2).
3. according to claim 1 or the described a kind of viscous vibration lazy halyard device that is used for cable stayed bridge of claim 2, it is characterized in that: the diameter of described lazy halyard (1) is for tiltedly drawing 0.2 to 0.5 times of main rope diameter, material with tiltedly draw main rope identical, the internal diameter of described second cuff (3) is 1.0 to 1.2 times of lazy halyard (1) diameter.
4. according to claim 1 or the described a kind of viscous vibration lazy halyard device that is used for cable stayed bridge of claim 2, it is characterized in that: described first cuff (2) is fixedly formed by the bolt part by two ring-like shaped steel of semicircle, and the internal diameter of the ring-like shaped steel of semicircle is identical with the external diameter that tiltedly draws the main rope outer sleeve.
5. according to claim 1 or the described a kind of viscous vibration lazy halyard device that is used for cable stayed bridge of claim 2, it is characterized in that: a lazy halyard (1) links to each other with three skew cables serial connection at least, and lazy halyard (1) is 70 degree～110 degree with the suspension cable intersecting angle.
6. according to claim 1 or the described a kind of viscous vibration lazy halyard device that is used for cable stayed bridge of claim 2, it is characterized in that: the displacement range of described viscous damper (6) is more than or equal to ± 3cm.
7. according to claim 1 or the described a kind of viscous vibration lazy halyard device that is used for cable stayed bridge of claim 2, it is characterized in that: described lazy halyard (1) need apply pretension when installing, and does not occur negative pulling force in the time of will guaranteeing tiltedly to draw the main rope vibration in principle in the lazy halyard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100936557A CN101660292B (en) | 2009-09-25 | 2009-09-25 | Viscous vibration-absorption auxiliary rope device for cable-stayed bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100936557A CN101660292B (en) | 2009-09-25 | 2009-09-25 | Viscous vibration-absorption auxiliary rope device for cable-stayed bridge |
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| CN101660292A CN101660292A (en) | 2010-03-03 |
| CN101660292B true CN101660292B (en) | 2011-05-18 |
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| CN2009100936557A Expired - Fee Related CN101660292B (en) | 2009-09-25 | 2009-09-25 | Viscous vibration-absorption auxiliary rope device for cable-stayed bridge |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2462548C2 (en) * | 2010-05-12 | 2012-09-27 | Солетанш Фрейсине | Method to damp vibrations of guy cable and appropriate system |
| CN102277830B (en) * | 2011-04-21 | 2014-11-26 | 深圳大学 | Cable stayed bridge and vibration-reducing auxiliary cable device for same |
| CN102561184B (en) * | 2011-12-30 | 2014-10-29 | 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 |
| CN105317006B (en) * | 2015-10-30 | 2017-01-18 | 深圳大学 | Cable bearing bridge and auxiliary cable monitoring and damping system thereof |
| CN109056528B (en) * | 2018-09-25 | 2024-03-12 | 中铁二院工程集团有限责任公司 | Railway upper-bearing type steel truss girder suspension bridge |
| CN112049010A (en) * | 2020-09-09 | 2020-12-08 | 段满红 | Stay cable vibration reduction system |
| CN112177415B (en) * | 2020-10-12 | 2022-08-05 | 同济大学 | TMD system that annular multi-direction was arranged |
| CN113622304B (en) * | 2021-08-06 | 2023-04-11 | 中铁大桥局集团有限公司 | Stay cable lever amplification damping device |
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- 2009-09-25 CN CN2009100936557A patent/CN101660292B/en not_active Expired - Fee Related
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Granted publication date: 20110518 Termination date: 20110925 |