CN112458881A - Semi-active device for controlling bridge flutter - Google Patents
Semi-active device for controlling bridge flutter Download PDFInfo
- Publication number
- CN112458881A CN112458881A CN202011378111.8A CN202011378111A CN112458881A CN 112458881 A CN112458881 A CN 112458881A CN 202011378111 A CN202011378111 A CN 202011378111A CN 112458881 A CN112458881 A CN 112458881A
- Authority
- CN
- China
- Prior art keywords
- bridge
- flutter
- semi
- main beam
- rigid plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000000694 effects Effects 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims description 3
- 239000008397 galvanized steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 5
- 230000001681 protective effect Effects 0.000 abstract 1
- 230000001629 suppression Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention belongs to the technical field of wind resistance of bridges, and provides a semi-active device for controlling flutter of a bridge. According to the requirement of bridge flutter control, the high-strength rigid plate device is low in installation cost, adjustable in size, convenient to assemble and disassemble and capable of swinging adaptively along with wind load at a proper position of a web plate or a bottom plate of a main beam, improves the flow field characteristics around the main beam and finally achieves semi-active suppression of bridge flutter. Compared with the traditional fixed pneumatic measure, the movable measure has the main advantages of more convenient adjustment of parameters such as position, shape, size, quality and the like, simple and convenient installation and lower engineering cost. The pneumatic measure is used as a temporary standby protective measure, the requirement on the wind resistance of the bridge can be reduced, and the total construction cost of the bridge engineering is further greatly reduced.
Description
Technical Field
The invention belongs to the technical field of wind resistance of bridges, and relates to a pneumatic measure of a semi-active device for controlling flutter of a bridge.
Background
The problem of wind-induced vibration of the large-span flexible bridge is prominent, and the collapse and damage of the bridge can be caused, so that the need of stopping the vibration is avoided. According to the traditional method, the flutter critical wind speed and the wind resistance safety of the bridge can be improved by structural measures of increasing the width of a bridge deck, increasing the mass and mass moment of inertia of a main beam, improving the structural rigidity and the like. However, the cost of the structural measures is relatively high, and the wind power generation device is particularly positioned in a region with high strong wind and high flutter inspection wind speed. Therefore, the above structural measures are not generally employed to control bridge flutter. Besides the structural measures, permanent pneumatic measures including air nozzles, central stabilizing plates, skirts, flow distribution plates and the like fixed on the main beam can be adopted to improve the wind resistance of the bridge, and a final design scheme is generally obtained through a wind tunnel test. The measures are generally fixed on a main beam of the bridge, and when the measures are applied to a real bridge, the effect is not ideal, and the measures are difficult to adjust and replace. The central slotting pneumatic measure has obvious effect on improving the flutter performance of the bridge, but has higher engineering cost and can cause more serious vortex vibration. Mechanical measures such as a damper can increase the damping of a bridge system, effectively control vortex vibration and reduce buffeting response, but the flutter control efficiency is low, so the damper is not adopted generally. Aiming at the defects of the traditional bridge flutter control measures, a pneumatic measure which is convenient to assemble and disassemble, low in cost, adjustable in parameters and better in adaptability needs to be researched.
Disclosure of Invention
Aiming at the problem of flutter control of a long-span bridge, the invention provides a high-strength rigid plate device which is low in installation cost, adjustable in size, convenient to disassemble and assemble, capable of swinging adaptively along with wind load, capable of improving the flow field characteristics around a main beam and finally capable of restraining the flutter of the bridge in a semi-active mode. In order to achieve the best control effect of the measures on the flutter of the bridge, the measures are generally installed on a rigid model of a main beam of the bridge or a full-bridge aeroelastic model, and relevant parameters of a rigid plate including installation position, shape, size, quality and the like are optimized through a wind tunnel test. The device mainly comprises a main beam 1, a groove-shaped hanging hole 2, a rigid plate 3, a round hole 4 and a clamping ring 5.
The technical scheme of the invention is as follows:
a semi-active device for controlling the vibration of a bridge takes the wind-induced vibration of a main beam 1 as a controlled target; a plurality of groove-shaped hanging holes 2 are arranged at proper positions of a web plate or a bottom plate of a main beam 1 for hanging a rigid plate 3; reserving round holes 4 at a plurality of positions near the upper edge of the rigid plate 3; a clamping ring 5 is adopted to penetrate through the round hole 4 and the groove-shaped hanging hole 2 to suspend the rigid plate 3 on the main beam 1; after the installation is finished, the snap ring 5 is locked by a nut to prevent the snap ring 5 from unhooking and the rigid plate 3 from falling; the rigid plate 3 can rotate around an axis formed by connecting lines of the groove-shaped hooks under the action of wind load, so that the flow field is improved, the damping effect is increased, and the aims of improving the flutter critical wind speed of the bridge and controlling the flutter are fulfilled.
The invention has the beneficial effects that: the high-strength rigid plate device has the advantages of low installation cost, adjustable size and convenient assembly and disassembly at the proper position of the web plate or the bottom plate of the main beam, can swing along with wind load in a self-adaptive manner, improves the flow field characteristics around the main beam, and finally realizes semi-active inhibition of the occurrence of the flutter of the bridge. Relative advantages of the measures include more convenient adjustment of parameters such as position, shape, size, quality and the like, simple and convenient installation and lower engineering cost. According to the semi-active device for controlling the flutter of the bridge, under a common condition, only the groove-shaped hanging holes 2 are reserved on the main beam, the rigid plate 3 does not need to be installed on the bridge, and the rigid plate 3 can be temporarily manufactured and installed according to weather forecast (days can be brought in advance) under the condition that the strong wind endangers the bridge. The strong wind can not occur in the whole design life cycle of the bridge, so that the cost for manufacturing and installing the rigid plate 3 is not needed, the requirement on the flutter critical wind speed of the bridge is also reduced, and the construction cost can be greatly reduced.
Drawings
FIG. 1 is a diagram of a semi-active device configuration of the type that controls bridge flutter.
Fig. 2 is a detailed view of the attachment of the rigid plates.
In the figure: 1, a main beam; 2, groove type hanging holes; 3 a rigid plate; 4, circular holes; 5 a snap ring.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
A semi-active device for controlling the flutter of a bridge mainly comprises a main beam 1, a groove-shaped hanging hole 2, a rigid plate 3, a round hole 4 and a clamping ring 5. A plurality of groove-shaped hanging holes 2 are fixed at proper positions of a web plate or a bottom plate on the main beam 1 through welding or bolting; round holes 4 are reserved at a plurality of positions near the upper edge of the rigid plate 3; a clamping ring 5 is adopted to penetrate through the round hole 4 and the groove-shaped hanging hole 2, and the rigid plate 3 is hung on the main beam 1; then, the snap ring 5 is locked by adopting measures such as a nut and the like so as to prevent the snap ring 5 from unhooking and prevent the rigid plate 3 from falling; the rigid plate 3 can rotate freely under the action of wind load, so that the flow field is improved, and the wind resistance of the bridge is further improved.
Preferably, the main beam 1 is not limited to the streamline box beam section drawn in the drawing, but is also applicable to other various main beam sections, such as an integral box beam section with a cantilever arm, a pi-shaped section and the like.
Preferably, the groove-shaped hanging hole 2 is generally formed by bending smooth steel bars or aluminum bars, has enough strength and rigidity, is subjected to rust prevention treatment, can reduce friction between the groove-shaped hanging hole and the clamping ring 5 as much as possible, and can be fixed on the main beam 1 in a welding or bolting mode.
Preferably, the net hole size of the groove-shaped hanging hole 2 is proper; the size is too small, which may not facilitate the installation of the snap ring 5 and the rigid plate 3 due to construction manufacturing errors, and may even limit the free rotation of the rigid plate 3; the size is too large, the distance between the main beam 1 and the rigid plate 3 is too large, the sliding space of the rigid plate 3 along the axial direction of the bridge is large, and the reciprocating severe collision can occur to influence the control effect; the groove-shaped hanging hole 2 can be made into a structure of 5cm multiplied by 5 cm.
Preferably, the rigid plate 3 can be a galvanized steel plate or a corrugated steel plate, or even a punched plate, and has large mass, large rigidity and low cost compared with an aluminum plate, and the thickness thereof is selected, on one hand, engineering cost is considered, and on the other hand, control effect is considered.
Preferably, the shape and size of the rigid plate 3 are not limited, and the number and positions of the round holes 4 and the snap rings 5 arranged on the rigid plate 3 are set as required.
Preferably, the rigid plate 3 can be conveniently and reliably hung on the main beam 1 through the clamping ring 5 and can freely rotate so as to adaptively and semi-actively control the wind field according to wind load; the rigid plate 3 is convenient to replace.
Preferably, the rigid plates 3 are not necessarily arranged continuously along the length direction of the bridge, but also can be arranged discontinuously, so that the construction cost is reduced.
Preferably, the rigid plates 3 can be symmetrically arranged on two sides of the main beam, or can be arranged on only one side according to the wind direction, so as to achieve better control effect.
Preferably, the rigid plate 3 should have sufficient rigidity, strength and weather resistance, have a longer service life and reduce construction cost.
Preferably, the rigid plate 3 may be added with a soft cloth material with a certain width at the lower end along the length direction to achieve better control effect.
Preferably, the snap ring 5 has enough rigidity, strength and good weather resistance, and is a key stress part and has a small size, so that a plain white steel material can be adopted, the diameter is about 2cm, and the influence on the whole manufacturing cost is small.
Preferably, the semi-active device for controlling the flutter of the bridge can also achieve the purpose of controlling the vortex vibration by adjusting the position, the shape, the size and the material of the rigid plate for different sections of the main beam.
Claims (10)
1. A semi-active device for controlling the flutter of a bridge is characterized by comprising a main beam (1), a groove-shaped hanging hole (2), a rigid plate (3), a round hole (4) and a clamping ring (5); the wind-induced vibration of the main beam (1) is a controlled object; a plurality of groove-shaped hanging holes (2) are arranged at proper positions of a web plate or a bottom plate of the main beam (1); reserving round holes (4) at a plurality of positions near the upper edge of the rigid plate (3); a clamping ring (5) is adopted to pass through the round hole (4) and the groove-shaped hanging hole (2) to suspend the rigid plate (3) on the main beam (1); the snap ring (5) is locked by a nut to prevent the snap ring (5) from unhooking and the rigid plate (3) from falling; the rigid plate (3) rotates around an axis formed by connecting the groove-shaped hooks (2) under the action of wind load, so that the flow field is improved, the damping effect is increased, and the purpose of controlling flutter is achieved.
2. Semi-active device for controlling the flutter of a bridge according to claim 1, wherein the main beam (1) is a streamlined box beam section, an integrated box beam section with a cantilever arm or a pi-shaped section.
3. The semi-active device for controlling the flutter of the bridge according to claim 1 or 2, wherein the groove-shaped hanging hole (2) is made of round or aluminum steel bars in a bending mode, has sufficient strength and rigidity, is subjected to rust prevention treatment, simultaneously reduces friction between the groove-shaped hanging hole and the clamping ring (5) as much as possible, and is fixed on the main beam (1) in a welding or bolting mode; the groove-shaped hanging hole (2) is made into a structure of 5cm multiplied by 5 cm.
4. Semi-active device for controlling bridge flutter according to claim 1 or 2, wherein the rigid plate (3) is galvanized steel plate or corrugated steel plate or punched plate, and is continuously or discontinuously arranged along the length direction of the bridge; the rigid plates (3) are symmetrically arranged on two sides of the main beam (1) or only arranged on one side of the main beam (1) according to the wind direction; the number and the positions of the round holes (4) and the snap rings (5) arranged on the rigid plate (3) are set as required.
5. The semi-active device for controlling the flutter of the bridge according to claim 3, wherein the rigid plate (3) is a galvanized steel plate, a corrugated steel plate or a punched plate and is continuously or discontinuously arranged along the length direction of the bridge; the rigid plates (3) are symmetrically arranged on two sides of the main beam (1) or only arranged on one side of the main beam (1) according to the wind direction; the number and the positions of the round holes (4) and the snap rings (5) arranged on the rigid plate (3) are set as required.
6. Semi-active device for controlling bridge flutter according to claim 1, 2 or 5, characterized in that the rigid plate (3) is added with a certain width of soft cloth at its lower end along the length direction to achieve better control effect.
7. Semi-active device for controlling bridge flutter according to claim 3, wherein the rigid plate (3) is added with a certain width of soft cloth at its lower end along the length direction to achieve better control effect.
8. Semi-active device for controlling bridge flutter according to claim 4, wherein the rigid plate (3) is added with a certain width of soft cloth at its lower end along the length direction to achieve better control effect.
9. Semi-active device for controlling bridge flutter according to claim 1, 2, 5, 7 or 8, wherein the snap ring (5) is made of polished round white steel material and has a diameter of 2 cm.
10. Semi-active device for controlling bridge flutter according to claim 6, wherein the snap ring (5) is made of a polished round white steel material and has a diameter of 2 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011378111.8A CN112458881A (en) | 2020-11-30 | 2020-11-30 | Semi-active device for controlling bridge flutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011378111.8A CN112458881A (en) | 2020-11-30 | 2020-11-30 | Semi-active device for controlling bridge flutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112458881A true CN112458881A (en) | 2021-03-09 |
Family
ID=74805039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011378111.8A Pending CN112458881A (en) | 2020-11-30 | 2020-11-30 | Semi-active device for controlling bridge flutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112458881A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106878A (en) * | 2021-04-14 | 2021-07-13 | 苏交科集团股份有限公司 | Method for improving flutter critical wind speed of super-large span bridge and reinforcing device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09137404A (en) * | 1995-11-15 | 1997-05-27 | Nkk Corp | Flutter preventive method of bridge girder |
| KR19990046760A (en) * | 1999-04-22 | 1999-07-05 | 장승필 | A Passive Aerodynamics Control Apparatus for Bridge Flutter |
| CN1226946A (en) * | 1996-05-29 | 1999-08-25 | 通用电器马可尼有限公司 | Bridge stabilization |
| CN201459615U (en) * | 2009-05-26 | 2010-05-12 | 山西汉德环境工程科技发展有限公司 | Highway wind break |
| CN108755390A (en) * | 2018-05-22 | 2018-11-06 | 东南大学 | A kind of active control system and control method improving Large Span Bridges wind resistance |
| CN110468676A (en) * | 2019-08-26 | 2019-11-19 | 同济大学 | Bridge structure |
| CN111101436A (en) * | 2020-01-14 | 2020-05-05 | 中铁二院工程集团有限责任公司 | Bridge wind barrier device and using method thereof |
| CN111305042A (en) * | 2020-02-29 | 2020-06-19 | 东北林业大学 | Large-span bridge wind vibration control method of self-adaptive swing flap |
| CN214271663U (en) * | 2020-11-30 | 2021-09-24 | 大连理工大学 | Semi-active device for controlling flutter of bridge |
-
2020
- 2020-11-30 CN CN202011378111.8A patent/CN112458881A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09137404A (en) * | 1995-11-15 | 1997-05-27 | Nkk Corp | Flutter preventive method of bridge girder |
| CN1226946A (en) * | 1996-05-29 | 1999-08-25 | 通用电器马可尼有限公司 | Bridge stabilization |
| KR19990046760A (en) * | 1999-04-22 | 1999-07-05 | 장승필 | A Passive Aerodynamics Control Apparatus for Bridge Flutter |
| CN201459615U (en) * | 2009-05-26 | 2010-05-12 | 山西汉德环境工程科技发展有限公司 | Highway wind break |
| CN108755390A (en) * | 2018-05-22 | 2018-11-06 | 东南大学 | A kind of active control system and control method improving Large Span Bridges wind resistance |
| CN110468676A (en) * | 2019-08-26 | 2019-11-19 | 同济大学 | Bridge structure |
| CN111101436A (en) * | 2020-01-14 | 2020-05-05 | 中铁二院工程集团有限责任公司 | Bridge wind barrier device and using method thereof |
| CN111305042A (en) * | 2020-02-29 | 2020-06-19 | 东北林业大学 | Large-span bridge wind vibration control method of self-adaptive swing flap |
| CN214271663U (en) * | 2020-11-30 | 2021-09-24 | 大连理工大学 | Semi-active device for controlling flutter of bridge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106878A (en) * | 2021-04-14 | 2021-07-13 | 苏交科集团股份有限公司 | Method for improving flutter critical wind speed of super-large span bridge and reinforcing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214271663U (en) | Semi-active device for controlling flutter of bridge | |
| CN108643019B (en) | Bridge flutter and vortex vibration integrated control device and control method thereof | |
| EP0768428B1 (en) | Super-long span suspension bridge | |
| WO2022027827A1 (en) | Blade torsion vibration damping apparatus and method for horizontal-axis wind power generator set | |
| CN112458881A (en) | Semi-active device for controlling bridge flutter | |
| CN109969933A (en) | A kind of fan blade single blade mounting hanger | |
| EA003105B1 (en) | Multiaxis turbine | |
| CN111910504A (en) | Novel bridge vortex-induced vibration suppression device for replacing protective fence | |
| CN113374649A (en) | Single-pile type offshore floating type fan vibration reduction control structure | |
| CN110360065A (en) | A kind of vibration absorber for Large Scale Oceanic Wind Power Generation machine tower top | |
| CN112458882A (en) | Flexible device for controlling bridge vortex vibration | |
| KR20230003259A (en) | FLOATING WIND POWER GENERATOR UNIT | |
| CN110552545A (en) | electric tower structure and construction method thereof | |
| CN110925148A (en) | Wind power tower tube spoiler | |
| CN113652952B (en) | Vortex elimination method and vortex elimination device | |
| CN105220615B (en) | A kind of vibration absorber for suppressing large-span suspension bridge suspension rod wind-induced vibration | |
| CN214271661U (en) | Flexible device for controlling vortex vibration of bridge | |
| CN111519969A (en) | Breeze vibration pneumatic vibration damper for steel tube tower | |
| CN211474341U (en) | Wind power tower tube spoiler | |
| CN110847674A (en) | Breeze vibration energy consumption suppression device for rod piece of service steel pipe tower | |
| CN216952016U (en) | Assembled comprehensive support and hanger | |
| CN114033634B (en) | Device for inhibiting vortex-induced resonance of wind turbine | |
| CN113309813B (en) | Semi-active vibration absorption and energy dissipation control system for restraining vortex-induced vibration of bridge | |
| CN210003742U (en) | Damper mounting bracket and damper assembly | |
| CN209583328U (en) | A kind of fixed device of the rail brackets being applicable in test tower hoistway |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |