CN108517760B - A kind of central stabilizing mechanism improving split type box beam flutter stability - Google Patents
A kind of central stabilizing mechanism improving split type box beam flutter stability Download PDFInfo
- Publication number
- CN108517760B CN108517760B CN201810341684.XA CN201810341684A CN108517760B CN 108517760 B CN108517760 B CN 108517760B CN 201810341684 A CN201810341684 A CN 201810341684A CN 108517760 B CN108517760 B CN 108517760B
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- China
- Prior art keywords
- wing plate
- split type
- box beam
- movable wing
- type box
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
Abstract
The invention discloses a kind of central stabilizing mechanisms for improving split type box beam flutter stability, including the drag-line of the power device and connection the wing plate outer rim and the power device that are located at the movable wing plate in split type box beam top surface center and inside box beam；Bracket is set between the wing plate and the box beam, the bracket includes fixed part and telescopable portion, the fixed part is fixedly connected with the box beam, and the telescopable portion is fixedly connected with the wing plate, drives wing plate described in the cable control to rotate by the power device.The present invention adjusts the posture of wing plate by power device, Flutter Stability for Bridge can be improved well, on the other hand, the significantly rotation angle of wing plate and the telescopic nature of bracket will all expand applicability of such aerodynamic Measures in terms of improving Flutter Stability for Bridge significantly.
Description
Technical field
The present invention relates to bridge technology fields, it particularly relates to which one kind can be improved split type box beam flutter stability
Central stabilizing mechanism.
Background technique
A kind of twisting vibration of diversity can occur under certain wind speed for bridge, and the vibration of this diversity is eventually led
The destruction of bridge structure is caused, this vibration is referred to as flutter.Wind speed when flutter takes place in bridge is known as critical wind speed of flutter, when
When actual wind speed is less than this critical wind velocity, flutter would not occur for bridge structure.Currently, improving bridge structure flutter stability
Method be mainly improved by certain measures Bridge Flutter generation critical wind velocity, be broadly divided into three classes measure: structure is arranged
It applies, that is, improves the torsion stiffness of bridge structure, reduce mass mement of inertia, thus to improve the torsion fundamental frequency of bridge structure
Improve critical wind speed of flutter；Mechanical measure, i.e., by the way that damper is arranged come dissipation energy, to press down in bridge structure specific position
The vibration of bridge structure processed；Aerodynamic Measures, i.e., improve the aerodynamic configuration of bridge structure by certain measures, to improve bridge
Structural stability.In three classes measure, structural measure improves limitation to bridge structure flutter stability is improved, mechanical measure
Improvement is preferable, but cost is high.For aerodynamic Measures due to low cost, effect is good and is widely used in the flutter of bridge structure
Control.
Current common Bridge Flutter control measure are aerodynamic Measures, such as tuyere, deflector, steadying plate etc., such as patent text
(publication number: CN101892625A, CN206553911U) is offered, as shown in Figure 1, it discloses a kind of wind fin plates 1, with certain
Angle is fixed in bridge main body structure, for improving the aeroperformance of bridge, improves flutter stability, that is to say, that related
The prior art is substantially on the certain position of bridge by welding or riveting or the fixed wind deflector of other fixed forms or being
Steadying plate, or referred to as wind fin plate, are usually fixed along the direction for carrying out wind, water conservancy diversion are carried out to air-flow, to improve flutter instability
Property, Wind-resistance of Bridges performance is improved, but be passively to control the disadvantage is that these wind deflectors are all the specific positions for being fixed on bridge
Measure processed, restricted application can only be applicable under specific wind field, and only in wind levels, by bridge, (or other specific incline
Angle) when just show preferable air-flow guiding function, for various special wind existing for nature, these measures fixed
It is difficult to accomplish improve the flutter stability of bridge in all cases, universality is poor, and this is mainly due to addition theretos
Relative position on bridge be it is fixed, cannot be adjusted according to incoming flow wind characteristic Real-time Feedback, bad adaptability.The present invention is mentioned
The central stabilizing mechanism of Posable out can carry out the adjustment of posture according to the characteristic of incoming flow wind, and this adjustment expands steady
Determine applicability of the mechanism as flutter instability control plane.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of centers for improving split type box beam flutter stability to stablize
Mechanism, solve in current existing highway bridge structure improve flutter stability pneumatic structure existing for universality it is poor, cannot basis
The variation of wind direction is adjusted, and the problem of technical effect difference significantly improves the whole flutter stability of bridge structure, improves bridge
In the service life of beam, reduce risk.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs: including being located at split type box beam top surface
The movable wing plate in center and power device inside split type box beam and the connection movable wing plate outer rim and described dynamic
The drag-line of power device；Bracket is set between the movable wing plate and the split type box beam, the bracket include fixed part and
Telescopable portion, the fixed part are fixedly connected with the split type box beam, the telescopable portion and the movable wing plate
It is fixedly connected, movable wing plate rotation described in the cable control is driven by the power device.
Further, the movable wing plate and beam body have scheduled distance.
Further, one end of the telescopable portion of the bracket is connected by rotatably hinge and the movable wing plate center
It connects, the movable wing plate can be rotated around one end of the telescopable portion, rotate angle close to 180 °.
Further, the both ends of the movable wing plate are both provided with the drag-line, wherein described in the drive of drag-line described in side
Movable wing plate rotates, and drag-line described in the other side makes the movable wing plate restore reference attitude.
Further, the telescopable portion of the bracket is stretched back and forth adjusts the movable wing plate and the split type box beam
Distance, the bracket is fluid pressure type structure or electric structure or to manually adjust structure.
Further, the split type box beam width 32.24cm, height 35cm, the movable wing board width 5cm, length
50cm, the bracket fixture portions point long 5cm, the long 4cm of telescopable portion.
(3) beneficial effect
The present invention provides a kind of central stabilizing mechanisms for improving split type box beam flutter stability, have following beneficial to effect
Fruit: by power device adjust wing plate posture, Flutter Stability for Bridge can be improved well, on the other hand, wing plate it is big
Amplitude rotation angle and the telescopic nature of bracket will all expand such aerodynamic Measures significantly and stablize in raising Bridge Flutter
Applicability in terms of property.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram for improving Flutter Stability for Bridge in the prior art；
Fig. 2 is the central stabilizing mechanism according to an embodiment of the present invention for being arranged and being improved split type box beam flutter stability
Bridge Sections figure；
Fig. 3 is the central stabilizing mechanism according to an embodiment of the present invention for being arranged and being improved split type box beam flutter stability
Bridge box and beam segment top view；
Fig. 4 is wing plate bracket action schematic diagram according to an embodiment of the present invention；
Fig. 5 is wing plate bracket action schematic diagram according to an embodiment of the present invention.
In figure: 1 wind fin plate, 10 split type box beams, 11 movable wing plates, 12 bracket fixture portions point, 13 bracket telescopable portions,
14 drag-lines, 15 power devices.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art's every other embodiment obtained belong to what the present invention protected
Range.
Fig. 2 and Fig. 3 is the segment cross-section diagram and top view of box beam, by the movable wing for being located at split type 10 top surface of box beam center
Plate 11 and power device 15 inside split type box beam 10 form, between movable wing plate 11 and split type box beam 10 by
Every bracket connection, which includes the fixed part 12 that connect with split type box beam 10 and stretches with what movable wing plate 11 was connect
Contracting part 13.It is connect by rotary hinge with bracket at 11 width midway of movable wing plate.Movable 11 outer rim of wing plate passes through drawing
Rope 14 is connected with the power device 15 being located inside split type box beam 10.
The split type 10 width 32.24cm of box beam of example model main body, height 35cm, movable 11 width 5cm of wing plate, length
50cm, 12 long 5cm of bracket fixture portions point, telescopable portion 13 are 4cm long.
Working principle:
Under calm condition, movable 11 face of wing plate keeps horizontal, and power device 15 does not work, when blowing air over Bridge Sections
When, according to the characteristic of actual measurement incoming flow wind, cable movement is driven by power device 15, so that movable wing plate 11 be driven to rotate
(such as Fig. 4) mitigates pneumatic load, reaches mitigation bridge vibration, improves the purpose of flutter stability；It on the other hand, can be taking human as
The length of ground adjusting bracket telescopic section 13 optimizes movable 11 position of wing plate (such as Fig. 4), thus raising bridge by a larger margin
Flutter stability.
1) rotation of movable wing plate
In Fig. 4, there are drag-line 14 in movable 11 two sides of wing plate, and the rope of side can make under the drive of power device 15 can
Dynamic wing plate 11 drives rope rotation, and rotational steps are close to 180 degree, and when blowing air over Bridge Sections, power device 15 is according to wind spy
Property is adjusted in real time, and movable wing plate 11 is driven to rotate corresponding amplitude；The drag-line of the other side is the drag-line with reset effect,
It can make the posture of the recovery of movable wing plate 11 originally.Two drag-lines 14 can make movable wing plate under the drive of power device 15
11 have the effect of moving back and forth.
2) bracket is flexible
In figure 5 it is possible to which the length of artificial adjusting bracket telescopic segment leaves the split type case of main body to change movable wing plate 11
The distance of beam 10 expands the use scope of this aerodynamic Measures to preferably improve Flutter Stability for Bridge.
More than, it is merely preferred embodiments of the present invention, but scope of protection of the present invention is not limited thereto, it is any
Those familiar with the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its invents
Design is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of central stabilizing mechanism for improving split type box beam flutter stability, it is characterised in that: including being located at split type case
The movable wing plate (11) in beam (10) top surface center and power device (15) and the connection institute for being located at split type box beam (10) inside
State the drag-line (14) of movable wing plate (11) outer rim and the power device (15)；The movable wing plate (11) and the split type case
Bracket is set between beam (10), and the bracket includes fixed part (12) and telescopable portion (13), the fixed part (12)
It is fixedly connected with the split type box beam (10), the telescopable portion (13) is fixedly connected with the movable wing plate (11), leads to
It crosses the power device (15) and drives drag-line (14) control movable wing plate (11) rotation.
2. a kind of central stabilizing mechanism for improving split type box beam flutter stability according to claim 1, feature exist
In: the movable wing plate (11) and beam body have scheduled distance.
3. a kind of central stabilizing mechanism for improving split type box beam flutter stability according to claim 1, feature exist
In: one end of the telescopable portion (13) of the bracket is connect by rotatably hinge with movable wing plate (11) center, institute
Stating movable wing plate (11) can rotate around one end of the telescopable portion (13), rotate angle close to 180 °.
4. a kind of central stabilizing mechanism for improving split type box beam flutter stability according to claim 1, feature exist
In: the both ends of the movable wing plate (11) are both provided with the drag-line (14), wherein can described in drag-line described in side (14) drive
Dynamic wing plate (11) rotate, and drag-line (14) described in the other side makes the movable wing plate (11) restore reference attitude.
5. a kind of central stabilizing mechanism for improving split type box beam flutter stability according to claim 1, feature exist
In: the telescopable portion (13) of the bracket is stretched back and forth adjusts the movable wing plate (11) and the split type box beam (10)
Distance, the bracket are fluid pressure type structure or electric structure or manually adjust structure.
6. a kind of central stabilizing mechanism for improving split type box beam flutter stability according to claim 1, feature exist
In: split type box beam (10) the width 32.24cm, height 35cm, movable wing plate (11) the width 5cm, length 50cm, institute
State bracket fixture portions point (12) long 5cm, the long 4cm of the telescopable portion (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810341684.XA CN108517760B (en) | 2018-04-17 | 2018-04-17 | A kind of central stabilizing mechanism improving split type box beam flutter stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810341684.XA CN108517760B (en) | 2018-04-17 | 2018-04-17 | A kind of central stabilizing mechanism improving split type box beam flutter stability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108517760A CN108517760A (en) | 2018-09-11 |
| CN108517760B true CN108517760B (en) | 2019-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810341684.XA Active CN108517760B (en) | 2018-04-17 | 2018-04-17 | A kind of central stabilizing mechanism improving split type box beam flutter stability |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110468676B (en) * | 2019-08-26 | 2021-08-27 | 同济大学 | Bridge structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2313612B (en) * | 1996-05-29 | 2000-06-07 | Marconi Gec Ltd | Bridge stabilisation |
| JP2002266315A (en) * | 2001-03-07 | 2002-09-18 | Mitsubishi Heavy Ind Ltd | Bridge |
| DE102004053898A1 (en) * | 2004-11-09 | 2006-05-11 | Tutech Innovation Gmbh | Device for damping oscillatory motion in a building |
| CN102191747B (en) * | 2011-03-25 | 2013-04-10 | 中铁大桥勘测设计院有限公司 | Adaptive tuyere of steel box girder |
| CN106758774B (en) * | 2016-12-22 | 2019-03-29 | 西南交通大学 | A kind of suppression whirlpool grid device for the vibration control of wide cut Separated Twin-box Girder bridge whirlpool |
| CN207003276U (en) * | 2017-07-19 | 2018-02-13 | 贵州理工学院 | A kind of bridge paravent being easily installed |
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| CN108517760A (en) | 2018-09-11 |
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Effective date of registration: 20190505 Address after: No. 1239, Siping Road, Yangpu District, Shanghai Applicant after: Tongji University Address before: No. 1239, Siping Road, Yangpu District, Shanghai Applicant before: Tongji University Applicant before: Chongqing University |