CN109518587B - Plate-type suspender for inhibiting vortex-induced resonance - Google Patents
Plate-type suspender for inhibiting vortex-induced resonance Download PDFInfo
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- CN109518587B CN109518587B CN201910059847.XA CN201910059847A CN109518587B CN 109518587 B CN109518587 B CN 109518587B CN 201910059847 A CN201910059847 A CN 201910059847A CN 109518587 B CN109518587 B CN 109518587B
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- flat plate
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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
- E01D4/00—Arch-type bridges
-
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Abstract
The invention discloses a plate-type suspender for inhibiting vortex-induced resonance, which comprises a flat plate with a rectangular cross section and two vortex columns connected to the flat plate, wherein the two vortex columns are oppositely arranged, each vortex column is connected to the corresponding short side surface of the flat plate through at least two connecting parts, a gap is reserved between each vortex column and the corresponding short side surface of the flat plate, each vortex column comprises at least three side surfaces, the connection part between every two adjacent side surfaces is a convex sharp corner, the farthest side surface of all the side surfaces of each vortex column from the corresponding short side surface of the flat plate is a first wind shielding surface, and the orthographic projection of the first wind shielding surface on the corresponding short side surface of the flat plate covers the corresponding short side surface of the flat plate. The device effectively improves the pneumatic appearance of the plate-type suspender, disturbs the regular shedding of vortexes, reduces the vortex-induced resonance amplitude reduction of the plate-type suspender, improves the stability and wind resistance of the suspender, and reduces the safety risk of a bridge structure.
Description
Technical Field
The invention relates to the technical field of bridge plate-type suspender pneumatic structures, in particular to a plate-type suspender for inhibiting vortex-induced resonance.
Background
The suspender is a main force transmission component of the middle and lower bearing arch bridge, the safety performance of the suspender is directly related to the safety and durability of the bridge structure, along with the gradual development of the modern bridge towards the ultra-large span direction, the slenderness ratio of the suspender is further increased, and the suspender has light weight, small damping ratio and poor pneumatic stability, so that various harmful vibrations are easy to occur, the service life of the bridge is influenced, and even the structural safety of the whole bridge is endangered. For example, the Commodire Barry bridge in the United states almost completely breaks 9 booms after a two-day storm, and then dampens wind-induced vibrations by providing dampers, but costs approximately $130 ten thousand for this; the Jiujiang road-rail two-purpose bridge suspender is subjected to hole opening treatment in design, but after the main arch rib is closed, large vortex-induced vibration still occurs, and finally the suspender vortex-induced vibration is restrained by setting TMD.
At present, a viscoelastic hardening and tempering damper (TMD) is generally adopted as a windproof measure of the suspender, but the viscoelastic hardening and tempering damper has the defects of poor structural durability, high engineering cost and high maintenance cost, and is difficult to popularize and apply; meanwhile, the height-width ratio of the cross section of the plate-type suspender is generally 1:4-1:8, and the two characteristic length dimensions are large in difference, so that the vortex-induced vibration forms of the plate-type suspender are obviously different due to different incoming flow wind directions, the vortex-induced vibration forms of the circular suspender cannot be changed due to the change of the wind directions, and the design of the conventional circular suspender cannot be effectively applied to the plate-type suspender.
Therefore, there is an urgent need to design a plate-type vibration damping boom with good wind resistance.
Disclosure of Invention
The invention aims to overcome the defects that the prior bridge plate-type suspender is easily influenced by vortex-induced resonance and increases unsafe factors of a bridge structure, but the prior solution has poor economical efficiency and the like, and provides the plate-type suspender for inhibiting the vortex-induced resonance.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a restrain board-like jib of vortex-induced resonance, contains the cross section be the dull and stereotyped and connect in two vortex post on the dull and stereotyped, two the vortex post sets up relatively, every the vortex post pass through two at least adapting unit connect in the minor face side that the dull and stereotyped corresponds, every have the clearance between the minor face side that vortex post and dull and stereotyped correspond, every the vortex post contains at least three side, and junction between two adjacent sides is the closed angle of evagination, every the furthest is the windbreak face one of the minor face side that corresponds apart from the dull and stereotyped in all sides of vortex post, windbreak face one the orthographic projection on the minor face side that corresponds of dull and stereotyped covers the minor face side that corresponds of dull and stereotyped.
The plate-type suspender for inhibiting vortex-induced resonance comprises a flat plate with a rectangular cross section and two vortex columns connected to the flat plate, wherein the two vortex columns are respectively positioned at two sides of two short side surfaces of the flat plate, can be fixedly connected or detachably connected, the two short side surfaces of the flat plate are respectively connected with one vortex column, so that the pneumatic appearance of the plate-type suspender is effectively improved, the vortex columns are convex sharp corners, the shunting effect is improved, wind vibration is inhibited, the long edges of the plate-type suspender are installed along the bridge direction when being installed, the windward range can be effectively enlarged when the long edges of the flat plate face the wind, the stability and the wind resistance of the suspender are improved, the flat plate is prevented from being twisted and damaged, the side face farthest from the short side face corresponding to the flat plate in all the side faces of the vortex column is a first wind shielding face, the first wind shielding face is in orthographic projection on the side face of the short side corresponding to the flat plate, and therefore when the flat plate faces the wind in the short side direction, wind flow is blocked by the vortex column to be separated, the whole short side of the flat plate cannot be directly subjected to wind flow, the attachment of wind flow on a suspender is reduced, gaps are reserved between the vortex column and the side face of the short side corresponding to the flat plate, vortex near the suspender can be effectively disturbed, vortex formation is avoided, vortex excitation resonance is restrained, the service life of a member is effectively prolonged, the safety risk of a bridge structure is reduced, economy is excellent, and installation is convenient.
Preferably, the cross section of each turbulence column is triangular, and one corner of each turbulence column faces to the corresponding short side surface.
Further preferably, each of the connecting members is connected to a corresponding corner of the same-side spoiler column, and a central axis of each of the connecting members coincides with a central axis of the flat plate.
By adopting the arrangement mode, even if one sharp angle of the turbulent flow column is aligned with the central axis of the flat plate, the plane is used as a windward side, and the two sides of the plane are inclined planes which are retracted inwards, so that the wind flow around the turbulent flow column collides, the interference is effectively increased, and the effect of disturbing the air flow is further improved.
Further preferably, the triangle is an equilateral triangle.
By adopting the setting mode, the processing production and the installation are convenient.
Further preferably, the side length of the equilateral triangle is 1.2-2 times the thickness of the flat plate.
Preferably, the distance between each turbulence post and the corresponding short side surface of the flat plate is 1-2.5 times of the thickness of the flat plate.
By adopting the arrangement mode, the phenomenon that the gaps are too small, so that the turbulence effect of the long-side windward is poor is avoided; too large gaps are avoided, and when the short side faces the wind, the air flow can be reattached to the long side of the flat plate after the vortex columns are separated, so that the effect is poor.
Preferably, the shape and the size of the two turbulence columns are the same, and the clearance distance between the two turbulence columns and the flat plate is equal.
Preferably, the lengths of the two turbulence columns are the same as the length of the flat plate.
Preferably, each spoiler column and all the connecting parts on the same side are of an integrated structure, and the spoiler columns and the connecting parts are all aluminum components or steel components.
Preferably, when in installation, the upper end and the lower end of each turbulence post are provided with gaps.
By adopting the arrangement mode, namely, although each turbulence column is arranged along the through length of the flat plate, the turbulence column is not required to be connected with the arched girder and the bridge deck girder and a gap is reserved, the stress of the turbulence column participating in the structure is avoided, and the air flow separation effect of the mounting end part of the flat plate is better.
In summary, compared with the prior art, the invention has the following beneficial effects:
1. the plate-type suspender for inhibiting vortex-induced resonance effectively improves the aerodynamic shape of the plate-type suspender, disturbs the vortex near the suspender, disturbs the regular shedding of the vortex, reduces the lift vibration amplitude of the plate-type suspender, reduces the vortex-induced resonance amplitude of the plate-type suspender, improves the stability and wind resistance of the suspender, avoids the torsional damage of the suspender, reduces the attachment of wind current on the suspender, effectively prolongs the service life of members, reduces the safety risk of bridge structures, and has excellent economy and convenient installation.
2. By adopting the plate-type suspender for inhibiting vortex-induced resonance, the wind flow around the vortex column can collide, the interference is effectively increased, the vortex-induced resonance in two directions of a flat plate is inhibited, and the vortex-induced resonance is further improved.
Description of the drawings:
FIG. 1 is a schematic view of a plate boom for suppressing vortex-induced resonance according to the present invention;
FIG. 2 is a schematic cross-sectional view at A in FIG. 1;
FIG. 3 is a schematic cross-sectional view at B in FIG. 1;
FIG. 4 is a graph of flow field vorticity of a short side of the plate boom of example 1 when it is exposed to the wind;
FIG. 5 is a flow field vorticity plot of a long side of a plate boom of example 1 when it is windward;
FIG. 6 is a cross-sectional view showing the structure of a plate-type boom for suppressing vortex-induced resonance in embodiment 2;
fig. 7 is a schematic structural view of a plate boom for suppressing vortex-induced resonance in embodiment 3;
fig. 8 is a schematic structural view of a plate boom for suppressing vortex-induced resonance in embodiment 4.
The marks in the figure: 1-flat plate, 11-short side face, 2-turbulent flow column, 21-wind shielding face I, 3-connecting component.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings and specific examples. It should not be construed that the scope of the above subject matter of the present invention is limited to the following embodiments, and all techniques realized based on the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1-3, the plate-type suspension rod for suppressing vortex-induced resonance according to the present invention comprises a flat plate 1 with a rectangular cross section and two spoiler columns 2 connected to the flat plate 1, wherein the two spoiler columns 2 are symmetrically arranged, the two spoiler columns 2 have the same shape and size, each spoiler column 2 is connected to a corresponding short side 11 of the flat plate 1 through a plurality of connecting members 3, all the rods have the same size and shape, a gap is formed between each spoiler column 2 and the corresponding short side 11 of the flat plate 1, the gap distance between the two spoiler columns 2 and the flat plate 1 is equal, the gap between each spoiler column 2 and the corresponding short side 11 of the flat plate 1 is 1-2.5 times the thickness D of the flat plate 1, the gap is 1.5D, the lengths of the two spoiler columns 2 are the same as the length of the flat plate 1, the length direction of each spoiler column 2 is parallel to the length direction of the flat plate 1, all the connecting members 3 on the same side are integrally formed steel spoiler columns 2 and all the connecting members 3 are integrally formed by using aluminum members or all the connecting members 3.
In this embodiment, each of the spoiler columns 2 includes three sides, the cross section of each of the spoiler columns 2 is an equilateral triangle, the side length of each equilateral triangle is preferably 1.2-2 times the thickness D of the flat plate 1, the minimum distance between two adjacent connecting components 3 is 1D, one of the corners of each of the spoiler columns 2 faces the corresponding short side 11, each connecting component 3 is connected to the corresponding corner of the same side spoiler column 2, that is, the corner facing the short side 11, each central axis of each connecting component 3 coincides with the central axis of the flat plate 1, that is, two of the spoiler columns 2 face the center of the thickness of the flat plate 1, each connecting component 3 is a horizontal rod, the distance between two adjacent connecting components 3 is required to ensure that the spoiler columns can be safely and reliably connected with the flat plate 1, the distance is preferably less than or equal to 30 times the side length of the equilateral triangle, the distance between all sides of each of the spoiler columns 2 is the shortest distance between the corresponding short side 11 of the flat plate 1, that is the wind blocking surface 21, that is the two nearest sides of the spoiler columns 2 face the wind blocking surface 21, that is opposite to the wind blocking surface 21, and the wind blocking surface 21 is the two nearest side surfaces of the flat plate 1, and the wind blocking surface 21 is further projected on the two side surfaces of the flat plate 1.
When the short side faces wind, as in fig. 4, air flows from left to right, and incoming flows are blocked by the front Fang Raoliu column 2 to be separated, and then the plate-type suspender for inhibiting vortex-induced resonance is attached to the middle rear part of the plate 1, so that wake flow is stable, and vortex shedding phenomenon is not obvious due to shielding of the vortex-induced columns; when the long side is windward, as in fig. 5, the air flow flows from left to right, and flows outwards after passing through the gap between the vortex column 2 and the flat plate 1, the vortex column disturbs vortex which is originally formed on the upper section and the lower section of the flat plate due to air flow separation, and at the moment, cavities are formed in a large area behind the flat plate 1, the vortex falls off at a place far away from the flat plate 1.
When the installation, the arch bridge is connected to the upper end of dull and stereotyped 1, bridge surface roof beam is connected to the lower extreme of dull and stereotyped 1, and two of both sides the upper and lower both ends of vortex post 2 do not connect with arch bridge and bridge surface roof beam respectively, remain the gap, avoid the vortex post to participate in structural stress, the construction is more convenient, still avoid the complicated destruction that produces of local atress simultaneously to and be convenient for later maintenance, and can make the air current separation effect of dull and stereotyped 1 installation tip better.
Example 2
As shown in fig. 6, the plate-type boom for suppressing vortex-induced resonance according to the present invention has a structure substantially the same as that of the embodiment 1, except that the cross section of each of the spoiler posts 2 is rectangular, the width of the wind shielding surface 21 of the spoiler post 2 is still 1.2D, the cross section may be trapezoidal, the narrower side surface is close to the short side surface 11 of the plate 1, and the wider side surface is the wind shielding surface 21.
Example 3
As shown in fig. 7, the structure of the plate-type boom for suppressing vortex-induced resonance according to the present invention is substantially the same as that of embodiment 1, and is different in that when the length of the plate 1 is shorter, for example, the length of the plate 1 is smaller than 5-7 m, the spoiler columns 2 on both sides of the plate are not set to be the same length, that is, the lengths of the spoiler columns 2 are smaller than the length of the plate 1, preferably, the gap reserved at the upper end of the spoiler column 2 is smaller than or equal to 15 times the side length of the equilateral triangle, and the gap reserved at the lower end of the spoiler column 2 is also smaller than or equal to 15 times the side length of the equilateral triangle, so as to avoid influencing the shunting effect.
Example 4
As shown in fig. 8, the plate-type boom for suppressing vortex-induced resonance according to the present invention has a structure substantially the same as that of embodiment 1, and is different in that, when the length of the slab 1 is greater than 30m, if a whole through-length turbulence column 2 is provided, the slenderness ratio will be large, and the difficulties in processing, manufacturing and connecting construction will be great. For component processing and convenient construction, the turbulent flow column 2 can be broken into a plurality of sections, for example, 5-10 m is adopted as one section, the air flow separation effect of the end part of the turbulent flow column 2 is considered between the upper section and the lower section, and the distance between the two adjacent sections of the turbulent flow column 2 can be set to be less than or equal to 30 times of the side length of an equilateral triangle.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The utility model provides a plate-type suspender for inhibiting vortex-induced resonance, characterized by, contain the dull and stereotyped (1) of cross section rectangle and connect two vortex columns (2) on dull and stereotyped (1), two vortex columns (2) are relative to setting up, every vortex column (2) pass through at least two adapting unit (3) connect in the minor face side (11) that dull and stereotyped (1) corresponds, every vortex column (2) and have the clearance with minor face side (11) that dull and stereotyped (1) correspond, every vortex column (2) contain three side, the junction between two adjacent sides is the sharp angle of evagination, every vortex column (2) all are the windbreak face one (21) that is furthest from minor face side (11) that dull and stereotyped (1) correspond, the orthographic projection of windbreak face one (21) on minor face side (11) that dull and stereotyped (1) correspond covers the side (11) that dull and stereotyped (1) corresponds, every vortex column (2) length direction and flat board (1) are parallel, every vortex column (2) cross section between two adjacent sides is the angle of evagination column (2) is connected to one of the triangle-type (2) and corresponds on every side (3), the central axis of each connecting part (3) coincides with the central axis of the flat plate (1), and the first wind shielding surface (21) is parallel to the short side surface (11);
when in installation, the upper end of the flat plate (1) is connected with an arch bridge, the lower end of the flat plate (1) is connected with a bridge surface beam, the upper end and the lower end of the two turbulent flow columns (2) at two sides are not connected with the arch bridge and the bridge surface beam respectively, and a gap is reserved.
2. A plate boom for suppressing vortex-induced resonance according to claim 1, characterized in that said triangle is an equilateral triangle.
3. A plate boom for suppressing vortex-induced resonance according to claim 2, characterized in that the side length of the equilateral triangle is 1.2-2 times the thickness of the plate (1).
4. A plate hanger bar for suppressing vortex induced resonance according to claim 1, wherein the distance between the short side surfaces (11) of each of the turbulence columns (2) and the plate (1) is 1-2.5 times the thickness of the plate (1).
5. A plate boom for suppressing vortex induced resonance according to any of claims 1-4, characterized in that the shape and size of both said turbulence columns (2) are identical, and that the gap distance between both said turbulence columns (2) and the plate (1) is equal.
6. A panel boom for suppressing vortex induced resonance according to any of claims 1-4, characterized in that the length of both said spoiler posts (2) is the same as the length of the panel (1).
7. A panel boom for suppressing vortex-induced resonance according to any of claims 1-4, characterized in that each of said spoiler columns (2) is of integral construction with all of said connecting parts (3) on the same side, said spoiler columns (2) and connecting parts (3) being of aluminium or steel construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910059847.XA CN109518587B (en) | 2019-01-22 | 2019-01-22 | Plate-type suspender for inhibiting vortex-induced resonance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910059847.XA CN109518587B (en) | 2019-01-22 | 2019-01-22 | Plate-type suspender for inhibiting vortex-induced resonance |
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| CN109518587A CN109518587A (en) | 2019-03-26 |
| CN109518587B true CN109518587B (en) | 2023-09-29 |
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