CN102140776A - Asymmetric pneumatic wing plate for improving flutter stability of steel truss girder suspension bridge - Google Patents
Asymmetric pneumatic wing plate for improving flutter stability of steel truss girder suspension bridge Download PDFInfo
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- CN102140776A CN102140776A CN 201110000694 CN201110000694A CN102140776A CN 102140776 A CN102140776 A CN 102140776A CN 201110000694 CN201110000694 CN 201110000694 CN 201110000694 A CN201110000694 A CN 201110000694A CN 102140776 A CN102140776 A CN 102140776A
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- wing plate
- pneumatic
- suspension bridge
- girder suspension
- pneumatic wing
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Abstract
The invention discloses an asymmetric pneumatic wing plate for improving the flutter stability of a steel truss girder suspension bridge. The pneumatic wing plate consists of a composite material hollow wing plate and a plate end connection mechanism and has an asymmetric wing surface structure; the surface of an upper wing plate is a curved surface, and the surface of a lower wing plate is a flat surface; and the pneumatic wing plate can be arranged in a multilayer superposing mode. Due to a structural mode and an asymmetric pneumatic layout, the pneumatic wing plate has a better flutter eliminating effect, and is particularly suitable for the large-span steel truss girder suspension bridge.
Description
Technical field
Bridge engineering auxiliary of the present invention, especially the anti-flutter pneumatic wing plate of steel trussed girder suspension bridge is made the field.
Background technology
Demand along with technological progress and Modern Traffic transportation, build increasing Longspan Bridge and become inexorable trend, the lengthening in bridge span footpath makes structure greatly strengthen the sensitivity of wind, avoid the zitterbewegung of structure generation diversity also therefore to become the problem that to pay close attention in the long-span bridge beam design process, in bridge construction flutter and buffeting solution, pneumatic wing plate is being played the part of very important role.Pneumatic wing plate can increase the resistance coefficient of steel truss girder hardly, and it is simple in structure, the deadweight is very light, installs and checks easy to maintenancely, and economic performance is good.Chinese patent application CN200810226680.3 arranges continuously to full-bridge along vertical bridge in conjunction with central slot, has proposed the scheme as Fig. 1, bridge deck central slot 1 among the figure; Pneumatic wing plate 2; Bridge deck 3; Steel truss 4; Column 5; Longeron 6.Pneumatic wing plate 2 forms an integral body by most section assemblings, and pneumatic wing plate 2 two ends of shaping are for sealing; Each pneumatic wing plate sections length is 1/5 11 times of steel truss girder sections length, and the width of pneumatic wing plate 2 is 1,/30 one 1/10 times of steel truss girder width; Each pneumatic wing plate sections by bolt, rivet or be weldingly fixed on column 5 tops, column 5 lower ends are by bolt or be weldingly fixed on the longeron 6, longeron 6 two ends are by bolt or be weldingly fixed on inside, steel truss 4 both sides.And several schemes of symmetry wing plate have been proposed.
Summary of the invention
The objective of the invention is to develop a kind of pneumatic wing plate structure that is used to improve flutter stability of steel trussed girder suspension bridge, on the basis of existing technology, further optimize aerodynamic arrangement, make pneumatic wing plate have more good flutter and eliminate effect.
The objective of the invention is to realize by following means.
Improve the asymmetric aerodynamic wing plate of flutter stability of steel trussed girder suspension bridge, be made up of composite material hollow wing plate and plate end coupling mechanism, pneumatic wing plate adopts asymmetrical airfoil surface configuration, and the upper flange surface is a curved surface, and the lower wing plate surface is the plane; But multilayer build-up is installed.
Adopt make of the present invention, adopt asymmetrical aerodynamic arrangement, can make pneumatic wing plate have more good flutter and eliminate effect, be particularly suitable for the large span steel trussed girder suspension bridge and use.
Description of drawings
Fig. 1 is prior art pneumatic wing plate and bridge deck central slot combined pneumatic control device schematic diagram.
Fig. 2 is the outside drawing of pneumatic wing plate of the present invention.
Fig. 3 is double-deck pneumatic wing plate arrangement diagram.
The specific embodiment
Below in conjunction with accompanying drawing structure of the present invention is described in further detail.
Can see the asymmetric aerodynamic wing plate that is used to improve flutter stability of steel trussed girder suspension bridge by Fig. 2, form by composite material hollow wing plate 101 and plate end 102 and coupling mechanism 103, pneumatic wing plate adopts asymmetrical airfoil surface configuration, and the upper flange surface is a curved surface, and the lower wing plate surface is the plane; But multilayer build-up is installed.
Embodiment 1
Adopt the structure as Fig. 2 and Fig. 3, polyphenyl thioether composite material injection moulding wing plate adopts the paraboloidal top airfoil of oval calotte, and top airfoil wing height is 0.3m, and lower aerofoil is the plane.
Construct double-deck flutter with the pneumatic wing plate of embodiment 1 and eliminate structure, two wing plates all are fixed on the steel truss by column up and down, and the wide B of the wing is 1m, and the distance H of last lower aerofoil is 0.35 m.
Contract than wind tunnel test by the sections model, adopt central slot and pneumatic groups of vanes close the steel trussed girder suspension bridge critical wind speed of flutter of aerodynamic Measures (unit: m/s), data target such as following table:
| The angle of attack | The asymmetric oval calotte of embodiment 1 individual layer | Embodiment 3 double-deck asymmetric oval calottes |
| -3 degree | Greater than 128.0 | Greater than 130.6 |
| 0 degree | Greater than 101.3 | Greater than 130.6 |
| 3 degree | 73.2 | 76.1 |
Test shows, when multilayer build-up is installed up and down the ratio of the spacing H of pneumatic wing plate and wing plate width B be controlled at 0.35 the most suitablely, depart from this ratio, critical wind velocity is lower.Find also in the test that on the pneumatic wing plate surface stagnation of the circulation of vital energy structure is set, as uniform (degree of depth is 2cm) circular arc pit, critical wind speed of flutter has the trend of further raising.
Claims (3)
1. improve the asymmetric aerodynamic wing plate of flutter stability of steel trussed girder suspension bridge, be made up of composite material hollow wing plate and plate end coupling mechanism, it is characterized in that pneumatic wing plate adopts asymmetrical airfoil surface configuration, the upper flange surface is a curved surface, and the lower wing plate surface is the plane; But multilayer build-up is installed.
2. described being used to improves the pneumatic wing plate of flutter stability of steel trussed girder suspension bridge according to claim 1, it is characterized in that the pneumatic wing plate surface curve is an oval calotte.
3. described being used to improves the pneumatic wing plate of flutter stability of steel trussed girder suspension bridge according to claim 1, it is characterized in that the pneumatic wing plate surface is provided with stagnation of the circulation of vital energy structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110000694 CN102140776A (en) | 2011-01-05 | 2011-01-05 | Asymmetric pneumatic wing plate for improving flutter stability of steel truss girder suspension bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110000694 CN102140776A (en) | 2011-01-05 | 2011-01-05 | Asymmetric pneumatic wing plate for improving flutter stability of steel truss girder suspension bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102140776A true CN102140776A (en) | 2011-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110000694 Pending CN102140776A (en) | 2011-01-05 | 2011-01-05 | Asymmetric pneumatic wing plate for improving flutter stability of steel truss girder suspension bridge |
Country Status (1)
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| CN (1) | CN102140776A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1171712A (en) * | 1997-08-28 | 1999-03-16 | Nkk Corp | Cable stayed bridge |
| CN1875160A (en) * | 2003-11-04 | 2006-12-06 | 未来概念公司 | Pneumatic two-dimensional structure |
| US7200887B1 (en) * | 2006-01-27 | 2007-04-10 | Powers James M | Bridges assembled from ocean-mobile pontoon bridge modules |
| CN101135135A (en) * | 2006-09-02 | 2008-03-05 | 重庆交通大学 | Concrete arch-type bridge rigidity variable intelligent damping control system |
| CN101736687A (en) * | 2008-11-19 | 2010-06-16 | 中交公路规划设计院有限公司 | Pneumatic control device for improving flutter stability of steel trussed girder suspension bridge |
-
2011
- 2011-01-05 CN CN 201110000694 patent/CN102140776A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1171712A (en) * | 1997-08-28 | 1999-03-16 | Nkk Corp | Cable stayed bridge |
| CN1875160A (en) * | 2003-11-04 | 2006-12-06 | 未来概念公司 | Pneumatic two-dimensional structure |
| US7200887B1 (en) * | 2006-01-27 | 2007-04-10 | Powers James M | Bridges assembled from ocean-mobile pontoon bridge modules |
| CN101135135A (en) * | 2006-09-02 | 2008-03-05 | 重庆交通大学 | Concrete arch-type bridge rigidity variable intelligent damping control system |
| CN101736687A (en) * | 2008-11-19 | 2010-06-16 | 中交公路规划设计院有限公司 | Pneumatic control device for improving flutter stability of steel trussed girder suspension bridge |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110803 |