CN202208888U - Cable of cable-stayed bridge capable of inhibiting dry rope galloping and rain-wind induced vibration - Google Patents
Cable of cable-stayed bridge capable of inhibiting dry rope galloping and rain-wind induced vibration Download PDFInfo
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- CN202208888U CN202208888U CN2011202494493U CN201120249449U CN202208888U CN 202208888 U CN202208888 U CN 202208888U CN 2011202494493 U CN2011202494493 U CN 2011202494493U CN 201120249449 U CN201120249449 U CN 201120249449U CN 202208888 U CN202208888 U CN 202208888U
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- cable
- drag
- line
- induced vibration
- rain
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B5/00—Making ropes or cables from special materials or of particular form
- D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties
- D07B5/006—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties by the properties of an outer surface polymeric coating
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2015—Construction industries
- D07B2501/203—Bridges
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- Bridges Or Land Bridges (AREA)
Abstract
The utility model relates to a cable of a cable-stayed bridge capable of inhibiting dry rope galloping and rain-wind induced vibration. The cable is composed of a central steel wire rope and a surface protective sleeve. A spiral groove is arranged on the outside surface of the surface protective sleeve. The groove is a bidirectional spiral groove. Dry rope galloping and rain-wind induced vibration can be effectively inhibited. Simultaneously, resistance coefficients of a stay cable can be prevented from being increased.
Description
Technical field
The utility model relates to a kind of cable-stayed bridge cable, particularly a kind of cable-stayed bridge cable that can suppress to do Suo Chizhen and rain wind induced vibration.
Background technology
Suspension cable has characteristics such as deadweight is little, flexibility is big, damping is low as the main supporting member of cable stayed bridge, therefore under wind action, very easily vibrates.The wind-induced vibration influence factor of suspension cable is many, mechanism is complicated, vibration mode is many, and common drag-line wind-induced vibration type comprises vortex-induced vibration, wake flow galloping, rain wind induced vibration and dried Suo Chizhen etc.Wherein, rain wind induced vibration takes place under the wind and rain acting in conjunction, and the various countries researcher has carried out extensive studies to the rain wind induced vibration phenomenon in the past 20 years.Doing Suo Chizhen then is the significantly wind-induced vibration that descends to take place at the weather that has wind not have rain, is a kind of new drag-line wind-induced vibration form of just on cable stayed bridge, finding recently.The genesis mechanism of doing Suo Chizhen is different from vortex-induced vibration, wake flow galloping and rain wind induced vibration, for avoiding doing the generation of Suo Chizhen, needs to adopt new vibration control method.
The destruction that the significantly vibration of suspension cable can cause the fatigue of drag-line, produce fatigue crack, causes the drag-line corrosion protection system at rope anchor joint, the safety of serious harm cable stayed bridge, and cause pedestrian's Psychological Panic.Inhaul cable vibration control method commonly used at present is: mechanical control measure, structure control measure and aerodynamics control measure.
The machinery control measure are a kind of through the installation damper improves the oscillation damping method of stayed structure damping at the drag-line two ends.But because drag-line is done Suo Chizhen and rain wind induced vibration is significantly low frequency vibration, common damper is little to its effectiveness in vibration suppression.And along with the increase of drag-line length, the relative efficiency of conventional damper also will be more and more lower.
The structure control measure is to adopt lazy halyard that different drag-lines are connect.Lazy halyard can improve the vibration frequency of drag-line, can reduce the amplitude of drag-line, but can't avoid drag-line generation rain wind induced vibration and dried Suo Chizhen, and therefore the accident of lazy halyard fatigue failure often takes place.
The aerodynamics control measure are considered to a kind of cost-effective vibration reducing measure mainly through the aerodynamic performance that specially treated improves drag-line is carried out on the drag-line surface.The pneumatic vibration reducing measure of drag-line commonly used comprises on actual cable stayed bridge at present: axial projection is set on the drag-line surface, pit (seeing accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3 respectively) is set at the helix of the surperficial unidirectional winding convexity of drag-line with on the drag-line surface.
The main purpose of above-mentioned pneumatic vibration reducing measure is to suppress the rain wind induced vibration of drag-line.Yet, though the surface is provided with the generation that axial raised aerodynamic Measures can suppress rain wind induced vibration, the pneumatic unstable phenomenon of new drag-line can take place under high wind speed.The unidirectional helix that twines convexity can destroy the formation of rain line at the drag-line upper surface on the drag-line surface, disturbs the vibration of rain line at the drag-line upper surface, has reduced the possibility of drag-line generation rain wind induced vibration; But protruding helix has increased the front face area of drag-line, thereby can increase the resistance coefficient of drag-line.The aerodynamic Measures that pit is set on the drag-line surface can improve the roughness on drag-line surface, changes the fluid separation in the drag-line surface boundary layer; Destroy of the formation of rain line, reduce the possibility of drag-line generation rain wind induced vibration on the drag-line surface.However, in wind tunnel test with on the actual cable stayed bridge, all find: the rain wind induced vibration phenomenon still can take place in the drag-line of surface band pit sometimes.And nearest research shows: the suspension cable of this surface band pit can descend to take place significantly to do Suo Chizhen at the weather that has wind not have rain; In some cases, the pit on drag-line surface can increase the possibility that Suo Chizhen takes place to do drag-line on the contrary.
Therefore; Suo Chizhen and rain wind induced vibration phenomenon take place to do for fear of drag-line; Reduce the possibility of drag-line generation wind-induced vibration, improve the safety of suspension cable and cable stayed bridge, being necessary to develop new all has inhibiting pneumatic vibration reducing measure to dried Suo Chizhen and rain wind induced vibration.
The utility model content
The purpose of the utility model is the deficiency that overcomes the existing pneumatic vibration reducing measure of drag-line; A kind of cable-stayed bridge cable that can suppress to do Suo Chizhen and rain wind induced vibration is provided; It has new pneumatic vibration reducing measure; This new aerodynamic Measures can effectively suppress the dried Suo Chizhen and the rain wind induced vibration phenomenon of suspension cable, can avoid the increase of drag-line resistance coefficient simultaneously.
In order to solve the problems of the technologies described above; The design of the utility model is: the utility model in the surperficial sheath upper edge of suspension cable two opposite direction of rotation offer bidirectional screw shape groove, and can be according to actual needs along on two opposite direction of rotation 1,2 or many grooves being set respectively.The pitch of helical groove can be adjusted, and pitch is (D is the diameter of drag-line surface sheath) between 1D～6D.The shape of groove can be but be not limited to circular arc, rectangle or trapezoidal, and recess width is 2～5mm, and depth of groove is 2～5mm.
The aerodynamic Measures of this bidirectional screw shape groove can be used separately, also can use with the aerodynamic Measures that pit is established on the surface, promptly on the drag-line surface of band bidirectional screw shape groove pit is set again.
According to above-mentioned utility model design, the utility model adopts following technical proposals:
A kind of cable-stayed bridge cable that can suppress to do Suo Chizhen and rain wind induced vibration is made up of core wire rope and surperficial sheath, it is characterized in that the external surface of said surperficial sheath has helical groove.
Said helical groove is the bidirectional screw shape groove along two rightabout rotations.
Said bidirectional screw shape groove is on two opposite direction of rotation, one or more helical groove to be arranged respectively.
The pitch of said helical groove is 1D ~ 6D, and D is the external diameter of the surperficial sheath of drag-line, and the shape of cross section of groove is circular arc, rectangle or trapezoidal, and recess width is 2 ~ 5mm, and depth of groove is 2 ~ 5mm.
The surface distributed of said surperficial sheath pit.
Utility model has following conspicuous substantive distinguishing features and advantage compared with prior art:
1) groove of bidirectional screw shape can change the boundary layer separation point on drag-line surface, destroys the generation that karman vortex clocklike takes off; The groove of rightabout rotation can destroy along drag-line and axially form axial flow and axial whirlpool; Change drag-line three-dimensional fluid structure on every side; Reduce the pneumatic action force intensity and, destroy the occurrence condition that drag-line is done Suo Chizhen, suppress to do the generation of Suo Chizhen phenomenon along the axial correlation of drag-line.
2) groove of bidirectional screw shape can prevent the formation of rain line at the drag-line upper surface as the trickling path of rainwater on the drag-line surface, hinders the vibration of rain line on the drag-line surface.Make that under rainy weather, the circular profile of drag-line is not changed by the rain line, avoid drag-line generation rain wind induced vibration phenomenon.
3) on the drag-line surface that is provided with bidirectional screw shape groove pit is set again, can further destroys of formation and the vibration of rain line, and can improve the surface roughness of drag-line, further reduce the probability of happening that drag-line is done Suo Chizhen and rain wind induced vibration at the drag-line upper surface.
4) aerodynamic Measures that groove is set on the drag-line surface can not increase the front face area of drag-line, and this can be avoided increasing the drag-line aerodynamic drag.
Description of drawings
Fig. 1 establishes axial raised drag-line photo for surface in the past.
Fig. 2 is the drag-line photo of the protruding helix of unidirectional in the past winding.
Fig. 3 is the surperficial in the past drag-line photo that pit is set.
Fig. 4 is the drag-line sketch map of band bidirectional screw groove of the present invention.
Fig. 5 is the cross sectional representation of band bidirectional screw groove drag-line of the present invention.
Fig. 6 is the drag-line three-dimensional structure sketch map of band bidirectional screw groove of the present invention and surface crater.
The specific embodiment
The preferred embodiment accompanying drawings of the utility model is following:
Embodiment one:
With reference to figure 4; Instinct suppresses to do the suspension cable of the cable-stayed bridge cable of Suo Chizhen and rain wind induced vibration for band bidirectional screw shape groove; Offer helical groove at the smooth surface of suspension cable sheath along a direction of rotation earlier, and then offer helical groove on the drag-line surface along another direction of rotation.1,2 or many grooves can be set respectively on two direction of rotation according to actual needs.
Embodiment two:
The utility model and embodiment one are basic identical, and special feature is:
With reference to figure 6; The suspension cable of band bidirectional screw groove of the present invention and surface crater; Smooth surface at the suspension cable sheath is provided with pit earlier, offers helical groove along a direction of rotation on the drag-line surface then, offers helical groove along another direction of rotation on the drag-line surface more at last.1,2 or many grooves can be set respectively on two direction of rotation according to actual needs.The pitch of said helical groove 4 is 1D ~ 6D, and D is the external diameter of the surperficial sheath 2 of drag-line 1, and the shape of cross section of groove is circular arc, rectangle or trapezoidal, and recess width is 2 ~ 5mm, and depth of groove is 2 ~ 5mm.
Embodiment three:
Present embodiment and embodiment two are basic identical, and special feature is:
Referring to Fig. 6, this suspension cable 1 is made up of high-strength galvanized steel wire 2 and surperficial sheath 3 respectively from the inside to the outside, and helical groove 4 and surface crater 5 are arranged on the surperficial sheath 3.
Claims (5)
1. the cable-stayed bridge cable that can suppress to do Suo Chizhen and rain wind induced vibration is made up of core wire rope (2) and surperficial sheath (3), it is characterized in that the external surface of said surperficial sheath (3) has helical groove (4).
2. the cable-stayed bridge cable that can suppress to do Suo Chizhen and rain wind induced vibration according to claim 1 is characterized in that said helical groove (4) is the bidirectional screw shape groove along two rightabout rotations.
3. the cable-stayed bridge cable that can suppress to do Suo Chizhen and rain wind induced vibration according to claim 2 is characterized in that said bidirectional screw shape groove is on two opposite direction of rotation, one or more helical groove to be arranged respectively.
4. according to the said cable-stayed bridge cable that can suppress to do Suo Chizhen and rain wind induced vibration of claim 1; Its characteristic is 1D ~ 6D in the pitch of said helical groove (4); D is the external diameter of the surperficial sheath (2) of drag-line (1); The shape of cross section of groove is circular arc, rectangle or trapezoidal, and recess width is 2 ~ 5mm, and depth of groove is 2 ~ 5mm.
5. the cable-stayed bridge cable that can suppress to do Suo Chizhen and rain wind induced vibration according to claim 1 is characterized in that the surface distributed of said surperficial sheath (3) pit (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202494493U CN202208888U (en) | 2011-07-15 | 2011-07-15 | Cable of cable-stayed bridge capable of inhibiting dry rope galloping and rain-wind induced vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202494493U CN202208888U (en) | 2011-07-15 | 2011-07-15 | Cable of cable-stayed bridge capable of inhibiting dry rope galloping and rain-wind induced vibration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202208888U true CN202208888U (en) | 2012-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202494493U Expired - Fee Related CN202208888U (en) | 2011-07-15 | 2011-07-15 | Cable of cable-stayed bridge capable of inhibiting dry rope galloping and rain-wind induced vibration |
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|---|---|
| CN (1) | CN202208888U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102286919A (en) * | 2011-07-15 | 2011-12-21 | 上海大学 | Cable-stayed bridge cable capable of inhibiting dry-cable galloping and rain-wind induced vibration |
| CN103103927A (en) * | 2013-02-07 | 2013-05-15 | 柳州市冠桥预应力机械有限公司 | Installation method of inhaul cable protecting bush |
| CN103938545A (en) * | 2014-04-16 | 2014-07-23 | 哈尔滨工业大学 | Self-air-sucking and self-air-blowing vibration damping device for controlling wind-induced vibration of stay cable |
| CN104233956A (en) * | 2014-09-17 | 2014-12-24 | 上海大学 | Wavy stay cable with surface pneumatic measures for cable-stayed bridge |
| CN104264585A (en) * | 2014-09-17 | 2015-01-07 | 上海大学 | Stay cable with porous hollow housing for cable stayed bridge |
-
2011
- 2011-07-15 CN CN2011202494493U patent/CN202208888U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102286919A (en) * | 2011-07-15 | 2011-12-21 | 上海大学 | Cable-stayed bridge cable capable of inhibiting dry-cable galloping and rain-wind induced vibration |
| CN103103927A (en) * | 2013-02-07 | 2013-05-15 | 柳州市冠桥预应力机械有限公司 | Installation method of inhaul cable protecting bush |
| CN103103927B (en) * | 2013-02-07 | 2015-05-13 | 柳州市冠桥预应力机械有限公司 | Installation method of inhaul cable protecting bush |
| CN103938545A (en) * | 2014-04-16 | 2014-07-23 | 哈尔滨工业大学 | Self-air-sucking and self-air-blowing vibration damping device for controlling wind-induced vibration of stay cable |
| CN103938545B (en) * | 2014-04-16 | 2016-01-20 | 哈尔滨工业大学 | A kind of Self inhaling of suspension cable wind-induced vibration is from blowing vibration absorber |
| CN104233956A (en) * | 2014-09-17 | 2014-12-24 | 上海大学 | Wavy stay cable with surface pneumatic measures for cable-stayed bridge |
| CN104264585A (en) * | 2014-09-17 | 2015-01-07 | 上海大学 | Stay cable with porous hollow housing for cable stayed bridge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120502 Termination date: 20130715 |