CN108221642A - Improve the pneumatic structure of bridge H-type bluff body wind induced structural vibration performance - Google Patents
Improve the pneumatic structure of bridge H-type bluff body wind induced structural vibration performance Download PDFInfo
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- CN108221642A CN108221642A CN201810015579.7A CN201810015579A CN108221642A CN 108221642 A CN108221642 A CN 108221642A CN 201810015579 A CN201810015579 A CN 201810015579A CN 108221642 A CN108221642 A CN 108221642A
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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
- E01D19/00—Structural or constructional details of bridges
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Abstract
The present invention provides a kind of pneumatic structure for improving bridge H-type bluff body wind induced structural vibration performance, it is realized by increasing the aerodynamic stbilization plate being symmetric along web, the present invention can eliminate galloping phenomenon, processing and fabricating is convenient, construction is simple, to inhibiting the bridges H-type bluff body Structure Gallopings such as H-type sunpender that there is good effect, wind resistance is significantly improved.
Description
Technical field
The present invention relates to a kind of pneumatic vibration suppression measures, and in particular to a kind of improvement bridge H-type bluff body wind induced structural vibration performance
Pneumatic structure.
Background technology
H-type cross section structure object is widely used in real life, the chord member of sunpender, truss-type bridges such as arch bridge, greatly across room
Support bracket of lid structure etc..Research shows that strong air-flow separation can occur around H-type section for fluid, it is very big to there is scale
Vortex, while the Vortex Shedding of regularity can be generated in certain reynolds number range, object is generated along direction of flow and is hung down
The aerodynamic force of straight direction of flow, the even damage of vibration, fatigue occurs for induction works, as arch bridge, the sunpender of truss-type bridges, chord member exist
Galloping can occur under wind action, flutter, whirlpool shake, when serious vibration, can influence reliability and the safety of works.
Existing bridge vibration suppression measure mainly has mechanical measure, structural measure and an aerodynamic Measures three categories, mechanical measure and
Structural measure often designs complexity, and cost is high, so frequently with aerodynamic Measures.At present frequently with web, the wing on bridge boom
The method of plate trepanning inhibits to hang vibration of bar.Practical application finds that H-type sunpender surface trepanning operation in construction is more difficult,
And bending-buckling phenomenon is easily generated for some resistance to compression sunpenders, cause intensity, stability that cannot meet the requirements.
A kind of Chinese patent " rectangular bridge tower wind-induced vibration of chamfering inhibits construction " (notification number：CN203684092U, it is open
Day：2014.07.02 it) discloses steady using the galloping critical wind velocity of the guide vanes raising bridge tower of rectangular section and improvement galloping
It is qualitative, and furthermore present ventilative rate and galloping critical wind velocity, the relationship of stability.But disadvantage is that：1) public affairs
The vibration suppression construction that patent merely provides a kind of square cross-section bridge tower wind-induced vibration suitable for bridge is opened, is not particularly suited for except bridge
Other vertical members except this component of tower are particularly unsuitable for the components such as the very big sunpender of H-type section of slenderness ratio；2) should
There are still surface trepannings for the guide vanes construction of publication, increase construction and installation process and difficulty.
Invention content
The purpose of the present invention is to provide a kind of pneumatic structures for improving bridge H-type bluff body wind induced structural vibration performance.
In order to achieve the above objectives, present invention employs following technical schemes：
(rectangular flat plate) aerodynamic stbilization plate (i.e. one including the web both sides for being symmetrically disposed on bridge H-type bluff body structure
The web of a bridge H-type bluff body structure corresponds to one aerodynamic stbilization plate of arrangement per side, and a bridge H-type bluff body structure arranges two
Aerodynamic stbilization plate), plane where the aerodynamic stbilization plate is vertical with the web, and aerodynamic stbilization plate place plane respectively with bridge
Two flange plates of beam H-type bluff body structure it is parallel or in non-90 degree angle (for example, angle of inclination approximation of the control in 20 degree is put down
Row arrangement), there are for air-flow, (flow direction is from one of flange plate to another wing between aerodynamic stbilization plate and the web
Listrium) by gap.
The aerodynamic stbilization plate and the column being set at interval of certain distance on the web of bridge H-type bluff body structure are (vertical
Pillar height degree is identical) it is connected.
The distance on the aerodynamic stbilization plate to two edge of a wing of bridge H-type bluff body structure is equal.
The aerodynamic stbilization plate is symmetrically arranged in the both sides of the central axes of the web of bridge H-type bluff body structure.
The aerodynamic stbilization plate along bridge to arrangement.
The length of the aerodynamic stbilization plate and equal length (the i.e. elongated cloth of aerodynamic stbilization plate of bridge H-type bluff body structure
It puts).
The size in the gap between the web of the bridge H-type bluff body structure and aerodynamic stbilization plate is bridge H-type bluff body knot
The structure edge of a wing (plate) width H1 1/5~1/2 times (to reach best inhibition of vibration, the web of the bridge H-type bluff body structure with
The size in gap is 1/2 times of bridge H-type bluff body structure flange width H1 between aerodynamic stbilization plate).
The width of the aerodynamic stbilization plate is 2/3~5/6 times of bridge H-type bluff body structure flange width H1 (to reach most
Good inhibition of vibration, the width of the aerodynamic stbilization plate are 2/3 times of bridge H-type bluff body structure flange width H1).
The distance that the aerodynamic stbilization plate (top) is higher by same side wing edge (top) is bridge H-type bluff body structure flange width
(to reach best inhibition of vibration, the aerodynamic stbilization plate top is higher by the distance at the top of same side wing edge to 1/2~2/3 times of H1
2/3 times for bridge H-type bluff body structure flange width H).
Beneficial effects of the present invention are embodied in：
By setting aerodynamic stbilization plate, (vortex that generation can be detached with air-flow at the edge of a wing collides, while gas the present invention
Gap allows fraction to pass through between dynamic stability plate and web, so as to more strongly limit the scale of each vortex), it significantly improves
Bridge H-type bluff body Structure Galloping force coefficient, inhibits bridge H-type bluff body structure (such as H-type sunpender, chord member etc.) well
Galloping phenomenon, compared with existing aerodynamic Measures, processing and fabricating convenience, construction is simple, inhibition of vibration are apparent, and it is steady can to improve wind resistance
It is qualitative.
Further, the present invention is good to vortex-induced vibration is inhibited to have by the control to aerodynamic stbilization board size parameter
Effect, improve pneumatic structure inhibition of vibration.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the schematic cross-sectional view that H-type sunpender adds aerodynamic stbilization plate；
Fig. 3 is the former H-type sunpender (former section) and the perpendicular bending vibration width with aerodynamic stbilization plate sunpender that wind-tunnel vibration measuring is tested
Change comparison diagram with wind speed；
Fig. 4 is flow field wind speed trace diagram, wherein：(a) it is no aerodynamic stbilization plate, (b) is has aerodynamic stbilization plate；
Fig. 5 is flow field wind speed vorticity figure, wherein：(a) it is no aerodynamic stbilization plate, (b) is has aerodynamic stbilization plate；
Fig. 6 is each parameter dimensional drawing when aerodynamic stbilization plate inhibition of vibration is best；
In figure：1 represents web, and 2 represent flange plate, and 3 represent aerodynamic stbilization plate；D1 is arrived for aerodynamic stbilization plate lower end (inner end)
The distance of web, D2 are aerodynamic stbilization plate width, and D3 is distance of the aerodynamic stbilization plate top (outer end) to the edge of a wing (near) end；B
It is intermarginal away from (i.e. web width) for both wings；H1 is flange width.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
The present invention, using pneumatic board measure, changes structure (H-type section) airflow on surface for H-type sunpender galloping problem
Form improves the galloping force coefficient on H-type sunpender surface, inhibits galloping.Pneumatic board measure, which specifically includes, is set to H-type sunpender web
Aerodynamic stbilization plate 3 outside 1 both sides, the steadying plate are tabular, and aerodynamic stbilization plate 3 where H-type sunpender web central axes with putting down
Face is vertical, and aerodynamic stbilization plate 3 is in the orthographic projection on H-type sunpender web 1 and the axis line overlap (aerodynamic stbilization plate and two
Flange plate 2 is parallel).The equal length of aerodynamic stbilization plate 3 and H-type sunpender increases the H-type sunpender after aerodynamic stbilization plate referring to Fig. 1.
The former section of table 1. and different pneumatic board measure scheme Comparative results
Note：H1 is flange plate width, and D1 is distance of the aerodynamic stbilization plate lower end to web, and D2 represents that aerodynamic stbilization plate is wide
Degree, D3 are represented to arrive the distance of top flange at the top of aerodynamic stbilization plate, be specifically illustrating with reference to figure 2
Table 1 gives the result of calculation of 5 kinds of different operating modes, former H-type sunpender of the operating mode 1 for no aerodynamic stbilization plate, and operating mode 2~
5 be respectively between aerodynamic stbilization plate and web gap width and aerodynamic stbilization plate be higher by the distance value of D2 (determine) on the edge of a wing no
Disconnected increased operating mode.From table 1：After introducing aerodynamic stbilization plate, the galloping force coefficient of H-type sunpenderIt is apparent to increase
Greatly, and its value constantly increases as gap width and pneumatic board are higher by the increase of the distance on the edge of a wing, illustrates that such pneumatic board is arranged
H-type sunpender galloping force coefficient can be effectively improved by applying, and inhibit the generation of galloping, and (amplitude becomes Fig. 3 that wind tunnel test obtains with wind speed
Law) also demonstrate this conclusion, i.e. pneumatic board measure can eliminate galloping；Simultaneously according to fig. 3 it can be found that gap width and
The distance that pneumatic board is higher by the edge of a wing is bigger, and whirlpool amplitude is smaller, and aeroperformance is better.It is examined from resistance to shock and saving material angle
Consider, between aerodynamic stbilization plate and web gap width be 1/2 times of flange width and aerodynamic stbilization plate to be higher by edge of a wing distance be 2/3 times
Inhibition of vibration is best during flange width and most saves aerodynamic stbilization plate material, therefore operating mode 5 is pneumatic board measure optimum size side
Case (Fig. 6).
Aerodynamic stbilization plate and the H-type sunpender flow field trace of no aerodynamic stbilization plate and flow field whirlpool is set forth in Fig. 4 and Fig. 5
Amount.Analysis is it is found that during without aerodynamic stbilization plate, and for former section (H-type) when carrying out wind perpendicular to edge of a wing direction, air-flow is at upstream edge of a wing end
The separation stream that portion generates generates the very big vortex of single scale in web upper and lower sides, and sphere of action covers entire H-type sunpender section,
And vorticity is larger, very big lift is generated, so as to be susceptible to galloping phenomenon；Aerodynamic stbilization plate is respectively arranged in web both sides
Afterwards, the vortex that air-flow separation generates at the edge of a wing of upstream is flow in the middle part of section to collide with aerodynamic stbilization plate so that originally
The larger whirlpool of scale is dispersed as the smaller whirlpool of several scales, while gap allows part gas between aerodynamic stbilization plate and web
Stream passes through, so as to more strongly limit the scale in each whirlpool.By this measure, the coverage that gas streams pair cross-section contracts significantly
Subtract, the self excitation force that pair cross-section generates is far smaller than galloping critical condition, it is suppressed that the generation of galloping.
Simultaneously by continuing to optimize (such as table 1) to pneumatic board measure dimensional parameters, most whirlpool shakes (by aerodynamic stbilization at last
What plate generated) also it is limited in minimum amplitude.Therefore pneumatic board measure plays good control action to H-type section oscillation phenomenon.
In addition, referring to Fig. 1, after the spacing (gap width) between the web of aerodynamic stbilization plate and H-type sunpender determines, gas
Dynamic stability plate can be welded by using the column (by being stretched out on web) with being set up in web both side surface at interval of certain distance
The mode connect is completed to install, and the distance between column ensures integral strength, rigidity and the stability of aerodynamic stbilization plate.
According to table 1 and Fig. 3, Fig. 4, Fig. 5 as a result, galloping, which occurs, for bridge H-type sunpender may be used pneumatic board of the present invention
Measure inhibits.Meanwhile compared to other existing vibration suppression measures, the present invention can also make sunpender, chord member etc. in addition to simple processing
The galloping force coefficient increase of bridge H-type bluff body structure, vibration suppression efficiency are higher.The present invention can arrange separately as a kind of effective vibration suppression
It applies, can also be used with other vibration suppression combined measures.
Claims (9)
1. a kind of pneumatic structure for improving bridge H-type bluff body wind induced structural vibration performance, it is characterised in that：It is symmetrically disposed on including two
The aerodynamic stbilization plate (3) of web (1) both sides of bridge H-type bluff body structure, plane where the aerodynamic stbilization plate (3) and the abdomen
Vertically, and plane where aerodynamic stbilization plate (3) is parallel with two flange plates (2) of bridge H-type bluff body structure respectively or be in for plate (1)
Non-90 degree angle, between aerodynamic stbilization plate (3) and the web (1) there are for air-flow by gap.
2. a kind of pneumatic structure for improving bridge H-type bluff body wind induced structural vibration performance according to claim 1, it is characterised in that：
The aerodynamic stbilization plate (3) is connected with the column being set on the web (1) of bridge H-type bluff body structure at interval of certain distance.
3. a kind of pneumatic structure for improving bridge H-type bluff body wind induced structural vibration performance according to claim 1, it is characterised in that：
The distance on the aerodynamic stbilization plate (3) to two edge of a wing of bridge H-type bluff body structure is equal.
4. a kind of pneumatic structure for improving bridge H-type bluff body wind induced structural vibration performance according to claim 1, it is characterised in that：
The aerodynamic stbilization plate (3) is symmetrically arranged in the both sides of the central axes of the web (1) of bridge H-type bluff body structure.
5. a kind of pneumatic structure for improving bridge H-type bluff body wind induced structural vibration performance according to claim 1, it is characterised in that：
The aerodynamic stbilization plate (3) along bridge to arrangement.
6. a kind of pneumatic structure for improving bridge H-type bluff body wind induced structural vibration performance according to claim 1, it is characterised in that：
The length of the aerodynamic stbilization plate (3) and the equal length of bridge H-type bluff body structure.
7. a kind of pneumatic structure for improving bridge H-type bluff body wind induced structural vibration performance according to claim 1, it is characterised in that：
The size in the gap between the web (1) of the bridge H-type bluff body structure and aerodynamic stbilization plate (3) is bridge H-type bluff body structure
1/5~1/2 times of flange width H1.
8. a kind of pneumatic structure for improving bridge H-type bluff body wind induced structural vibration performance according to claim 1, it is characterised in that：
The width of the aerodynamic stbilization plate (3) is 2/3~5/6 times of bridge H-type bluff body structure flange width H1.
9. a kind of pneumatic structure for improving bridge H-type bluff body wind induced structural vibration performance according to claim 1, it is characterised in that：
The distance that the aerodynamic stbilization plate (3) is higher by same side wing edge is 1/2~2/3 times of bridge H-type bluff body structure flange width H1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810015579.7A CN108221642B (en) | 2018-01-08 | 2018-01-08 | Pneumatic structure for improving wind vibration performance of H-shaped blunt body structure of bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810015579.7A CN108221642B (en) | 2018-01-08 | 2018-01-08 | Pneumatic structure for improving wind vibration performance of H-shaped blunt body structure of bridge |
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| CN108221642A true CN108221642A (en) | 2018-06-29 |
| CN108221642B CN108221642B (en) | 2023-07-21 |
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| CN201810015579.7A Active CN108221642B (en) | 2018-01-08 | 2018-01-08 | Pneumatic structure for improving wind vibration performance of H-shaped blunt body structure of bridge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161774A (en) * | 2020-11-03 | 2021-01-01 | 长安大学 | Wind tunnel experiment device for three-degree-of-freedom coupled vibration under large wind attack angle |
| CN112853937A (en) * | 2021-03-12 | 2021-05-28 | 长安大学 | Wind vibration suppression device for large-span straight web steel box girder bridge |
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| CN103590323A (en) * | 2013-11-29 | 2014-02-19 | 西南交通大学 | Wind-induced vibration suppressing structure of chamfering square bridge tower |
| CN103952974A (en) * | 2013-11-29 | 2014-07-30 | 西南交通大学 | Wind-induced vibration suppression structure of square chamfered bridge tower |
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| CN208328658U (en) * | 2018-01-08 | 2019-01-04 | 长安大学 | A kind of pneumatic structure inhibiting bridge H-type bluff body Structure Galloping |
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2018
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Patent Citations (7)
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| JPS5047236U (en) * | 1973-08-29 | 1975-05-10 | ||
| JP2006057436A (en) * | 2004-07-23 | 2006-03-02 | Mitsubishi Heavy Ind Ltd | Girder type bridge |
| CN102409887A (en) * | 2011-08-08 | 2012-04-11 | 中铁第一勘察设计院集团有限公司 | Wind-resistant H-shaped steel column for high-speed railway contact network and method for determining aperture ratio of wind-resistant H-shaped steel column |
| CN103590323A (en) * | 2013-11-29 | 2014-02-19 | 西南交通大学 | Wind-induced vibration suppressing structure of chamfering square bridge tower |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161774A (en) * | 2020-11-03 | 2021-01-01 | 长安大学 | Wind tunnel experiment device for three-degree-of-freedom coupled vibration under large wind attack angle |
| CN112853937A (en) * | 2021-03-12 | 2021-05-28 | 长安大学 | Wind vibration suppression device for large-span straight web steel box girder bridge |
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| Publication number | Publication date |
|---|---|
| CN108221642B (en) | 2023-07-21 |
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