CN112458881A - Semi-active device for controlling bridge flutter - Google Patents
Semi-active device for controlling bridge flutter Download PDFInfo
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- 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
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- 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
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 4
- 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
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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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
本发明属于桥梁抗风技术领域，提供了一类控制桥梁颤振的半主动装置，包括主梁、槽型挂孔、刚性板、圆孔和卡环。根据桥梁颤振控制的需求，在主梁腹板或底板合适位置安装费用低廉、尺寸可调、拆装方便、可以随风荷载自适应摇摆，改善主梁周围流场特性，最终实现半主动抑制桥梁颤振发生的高强刚性板装置。相对传统固定的气动措施，该活动措施主要优势包括其位置、形状、尺寸、质量等参数调整更为便利，安装简便、工程费用更低。该类气动措施作为一种临时备用保护性措施，可以降低对桥梁自身抗风性能要求，进而大幅降低桥梁工程总体造价。
The invention belongs to the technical field of bridge wind resistance, and provides a semi-active device for controlling bridge flutter, including a main beam, a slot-shaped hanging hole, a rigid plate, a circular hole and a snap ring. According to the requirements of bridge flutter control, the installation cost is low, the size is adjustable, the disassembly and assembly are convenient, and the wind load can be adaptively swayed at the appropriate position of the main girder web or bottom plate. High-strength rigid plate device for bridge flutter. Compared with the traditional fixed pneumatic measures, the main advantages of this movable measure include that the adjustment of parameters such as its position, shape, size and quality is more convenient, the installation is simple, and the engineering cost is lower. As a temporary backup protective measure, this type of aerodynamic measure can reduce the requirements for the bridge's own wind resistance, thereby greatly reducing the overall cost of the bridge project.
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 |
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| Publication Number | Publication Date |
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| CN112458881A true CN112458881A (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011378111.8A Pending CN112458881A (en) | 2020-11-30 | 2020-11-30 | Semi-active device for controlling bridge flutter |
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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 | How to prevent flutter on bridge girders |
| 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 | A bridge wind barrier device and method of using the same |
| 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 | How to prevent flutter on bridge girders |
| 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 | A bridge wind barrier device and method of using the same |
| 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 |
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Application publication date: 20210309 |