CN103821081B - A kind of whirlpool for box section steel tower column shakes and galloping control device - Google Patents
A kind of whirlpool for box section steel tower column shakes and galloping control device Download PDFInfo
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- CN103821081B CN103821081B CN201410100199.5A CN201410100199A CN103821081B CN 103821081 B CN103821081 B CN 103821081B CN 201410100199 A CN201410100199 A CN 201410100199A CN 103821081 B CN103821081 B CN 103821081B
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Abstract
The invention discloses a kind of whirlpool for box section steel tower column to shake and galloping control device, each direction across bridge steel plate of steel tower column is welded with two suppression casees respectively, suppression case is along the height placement of whole steel tower column, each suppression case comprise two pieces be parallel to each other and vertical welding in the side plate of direction across bridge steel plate, the side plate parallel with direction across bridge steel plate is connected with between two blocks of side plates, side plate, the box structure internal welding that side plate and direction across bridge steel plate are formed is connected to multiple dividing plate, multiple dividing plate is arranged along the short transverse interval of steel tower column, side plate and/or side plate are provided with stiffening rib.The present invention is by changing the aerodynamic configuration of box section steel tower column, effective control steel tower column whirlpool amplitude, and prevent galloping unstability, for safety of structure, travel safety and comfortableness provide safeguard, simultaneously construction measure simple, economical and practical, also have positive effect to the landscape effect promoting bridge, be mainly used in cable stayed bridge or suspension bridge box section steel tower column.
Description
Technical field
The invention belongs to bridge engineering and disaster resistant engineering field, specifically, relate to a kind of Wind-resistance of Bridges structure.
Background technology
Box section steel tower column bridge field at home and abroad is all widely used, and its profile is succinct, it is convenient to construct, stress performance good, is applicable to various across footpath cable stayed bridge and suspension bridge.
It is that a kind of charming appearance and behaviour amplitude limit with self-excitation character that bridge steel column is easy to occur at low wind speeds vibrates that whirlpool shakes, the air flow swirl come off primarily of cross section afterbody produces, with certain self-excitation characteristic, structural vibration simultaneously can affect to vortex shedding again.Although it is the vibration of a kind of amplitude limit that whirlpool shakes, also can affects traffic safety when amplitude is larger, can not be ignored.
At present, due to whirlpool shake be a kind of amplitude limit vibration, there will not be catastrophic consequence, its impact is not considered in the design of existing steel tower column substantially, but practical experience proves, the whirlpool of box section steel tower column shakes the sustained vibration that also can produce compared with large amplitude, reduces the fatigue behaviour of steel tower column, adverse effect can be caused to driving equally, need to control it.
Another significant wind-induced vibration phenomenon of box bridge beam steel tower column is galloping, and galloping is a kind of self-excited vibration of diversity.And for box section steel tower column, the slope due to its lift coefficient is negative value, belongs to the unstable cross section of galloping, especially easily occur galloping unstability.Find through test and practical experience, the galloping of box section steel bridge tower is huge to bridge construction harm, and can make steel tower column that the vibration of large amplitude occurred, even collapse, therefore must control it, be against any misfortune generation.
At present, steel tower column galloping controls to adopt the good octagonal cross-section of galloping stability more, but the steel plate construction of this section form steel tower column comparatively box-shaped complexity, particularly connected node place structure is very loaded down with trivial details, and it is convenient that construction is not so good as box section.Another galloping control method does one respectively at box section steel tower column four angle points littlely to smear angle, and deflector is set to improve galloping stability smearing angle place, but deflector is installed inconvenient, and bridge tower outward appearance can be affected to a certain extent, the process of smearing angle also makes the structure of steel tower column become complicated, construction inconvenience.
To sum up, design a kind of simple structure, good looking appearance, respond well box-type section steel tower column whirlpool to shake and galloping control device is extremely necessary.
Summary of the invention
The present invention is to solve the technical problem that box bridge beam steel tower column shakes by whirlpool and galloping affects, provide a kind of whirlpool for box section steel tower column to shake and galloping control device, by changing the aerodynamic configuration of box section steel tower column, effective control steel tower column whirlpool amplitude, and prevent galloping unstability, for safety of structure, travel safety and comfortableness provide safeguard, simultaneously construction measure simple, economical and practical, also have positive effect to the landscape effect promoting bridge, be mainly used in cable stayed bridge or suspension bridge box section steel tower column.
In order to solve the problems of the technologies described above, the present invention is achieved by following technical scheme:
A kind of whirlpool for box section steel tower column shakes and galloping control device, each direction across bridge steel plate of steel tower column is welded with two suppression casees respectively, described suppression case is along the height placement of whole steel tower column, each described suppression case comprise two pieces be parallel to each other and vertical welding in the side plate of described direction across bridge steel plate, the side plate parallel with described direction across bridge steel plate is connected with between two blocks of described side plates, described side plate, the box structure internal welding that described side plate and described direction across bridge steel plate are formed is connected to multiple dividing plate, multiple described dividing plate is arranged along the short transverse interval of steel tower column, described side plate and/or described side plate are provided with stiffening rib.
Outside each described suppression case, the distance at side plate and described direction across bridge steel plate edge is 0.085 ~ 0.17 times of described direction across bridge steel plate width.
The described side plate width of each described suppression case is 0.18 ~ 0.22 times of described direction across bridge steel plate width.
The described side plate width of each described suppression case is 0.7 times of described side plate width.
The thickness of described side plate, described side plate, described dividing plate and described stiffening rib is 6 ~ 8mm.
The invention has the beneficial effects as follows:
(1) the present invention is on the basis that conventional boxes tee section steel tower column constructs, and increases by two suppression casees respectively in the outer avris windward side of steel tower column direction across bridge two.On the one hand, suppression case changes steel tower column wake vortices and to come off characteristic, avoids the formation of large-scale whirlpool, effectively reduces whirlpool amplitude; On the other hand, suppression case changes the aerodynamic configuration of box section, lift coefficient slope from negative value become on the occasion of, improve galloping stability, prevent galloping unstability.Thus improve safety and the comfortableness of driving, and be conducive to the application life extending bridge.
(2) the present invention adopts the suppression case of proper ratio, can improve the cross-sectional shape of box section steel tower column dullness, effectively improves the landscape effect of cable stayed bridge or suspension bridge.
(3) suppression case of the present invention is welded into sections first on the ground when constructing, and after steel tower column main structure construction completes, lifts each sections and steel tower column and assembles and form entirety, not only construct convenient, and be beneficial to guarantee construction quality, economical and practical.
Accompanying drawing explanation
Fig. 1 is that whirlpool provided by the present invention shakes and the section structure schematic diagram of galloping control device;
Fig. 2 is that whirlpool provided by the present invention shakes and the facade structures schematic diagram of galloping control device.
In figure: 1: side plate; 2: side plate; 3: stiffening rib; 4: dividing plate; 5: direction across bridge steel plate.
Detailed description of the invention
As depicted in figs. 1 and 2, this embodiment discloses herein a kind of whirlpool for box section steel tower column and shake and galloping control device, comprise the suppression case that side plate 1, side plate 2, stiffening rib 3 and dividing plate 4 are spliced to form.
Steel tower column comprises two direction across bridge steel plates 5, and suppression case is furnished with two along the height of whole steel tower column respectively outside each direction across bridge steel plate 5, and the spacing of two suppression casees adjusts with direction across bridge steel plate 5 change width.
Each suppression case forms box structure primarily of two blocks of side plates 1 and one piece of side plate 2.Two blocks of side plates 1 are parallel to each other, and vertical is welded on direction across bridge steel plate 5.Two blocks of side plates 1 are interconnected with side plate 2, and side plate 2 and direction across bridge steel plate 5 be arranged in parallel simultaneously.
Side plate 1 and side plate 2 inside are strengthened by stiffening rib 3 and dividing plate 4, to improve suppression case rigidity and local stability.The box structure inner space that side plate 1, side plate 2 and direction across bridge steel plate 5 surround is provided with multiple dividing plate 4, dividing plate 4 along steel tower column short transverse linearly successively interval arrange.Every block dividing plate 4 surrounding adopts four sides weld all around to weld together closely respectively with two blocks of side plates, 1, one piece of side plate 2 and direction across bridge steel plate 5.Welding stiffening rib 3 can be taken the circumstances into consideration, to ensure the local stability of side plate 1 and side plate 2 according to real size in the inner side of side plate 1 and side plate 2.Those skilled in the art reasonably can choose spacing and the size of stiffening rib 3 according to actual loading and detailing requiments.
Suppression case of the present invention not only changes steel tower column wake vortices and to come off characteristic, avoids the formation of large-scale whirlpool, effectively controls whirlpool amplitude; Have also been changed the aerodynamic configuration of box section, lift coefficient slope, by just bearing change, improves galloping stability, prevents galloping unstability simultaneously.
The thickness of side plate 1, side plate 2, stiffening rib 3 and dividing plate 4 is 6 ~ 8mm, and their welding each other all adopt fillet weld.
The outside side plate 1 of suppression case is 0.085 ~ 0.17 times of direction across bridge steel plate 5 width apart from the distance at direction across bridge steel plate 5 edge.Side plate 2 length of suppression case is identical with the height of steel tower column, and width is 0.18 ~ 0.22 times of direction across bridge steel plate 5 width.Side plate 1 length of suppression case is identical with the height of steel tower column, and width is 0.7 times of side plate 2 width.With epipleural 1 and side plate 2 the size of formation suppression case, can effectively control whirlpool amplitude, and prevent the generation of galloping.
Conveniently construct, ensure construction quality, side plate 1, side plate 2, stiffening rib 3 and dividing plate 4 is cut out on ground, then by side plate 1, side plate 2, stiffening rib 3 and dividing plate 4 on the ground merogenesis be welded into suppression case sections, after steel tower column main structure construction completes, lifting suppression case sections and steel tower column are assembled into entirety.
Although be described the preferred embodiments of the present invention by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, can also make the concrete conversion of a lot of form, these all belong within protection scope of the present invention.
Claims (5)
1. the whirlpool for box section steel tower column shakes and galloping control device, it is characterized in that, each direction across bridge steel plate of steel tower column is welded with two suppression casees respectively, described suppression case is along the height placement of whole steel tower column, each described suppression case comprise two pieces be parallel to each other and vertical welding in the side plate of described direction across bridge steel plate, the side plate parallel with described direction across bridge steel plate is connected with between two blocks of described side plates, described side plate, the box structure internal welding that described side plate and described direction across bridge steel plate are formed is connected to multiple dividing plate, multiple described dividing plate is arranged along the short transverse interval of steel tower column, described side plate and/or described side plate are provided with stiffening rib.
2. a kind of whirlpool for box section steel tower column according to claim 1 shakes and galloping control device, it is characterized in that, the described side plate in outside of each described suppression case and the distance at described direction across bridge steel plate edge are 0.085 ~ 0.17 times of described direction across bridge steel plate width.
3. a kind of whirlpool for box section steel tower column according to claim 1 shakes and galloping control device, and it is characterized in that, the described side plate width of each described suppression case is 0.18 ~ 0.22 times of described direction across bridge steel plate width.
4. a kind of whirlpool for box section steel tower column according to claim 1 shakes and galloping control device, and it is characterized in that, the described side plate width of each described suppression case is 0.7 times of described side plate width.
5. a kind of whirlpool for box section steel tower column according to claim 1 shakes and galloping control device, and it is characterized in that, the thickness of described side plate, described side plate, described dividing plate and described stiffening rib is 6 ~ 8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410100199.5A CN103821081B (en) | 2014-03-18 | 2014-03-18 | A kind of whirlpool for box section steel tower column shakes and galloping control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410100199.5A CN103821081B (en) | 2014-03-18 | 2014-03-18 | A kind of whirlpool for box section steel tower column shakes and galloping control device |
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| CN103821081A CN103821081A (en) | 2014-05-28 |
| CN103821081B true CN103821081B (en) | 2015-08-12 |
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| CN111613352B (en) * | 2020-06-04 | 2022-05-10 | 中国核动力研究设计院 | Vortex-induced vibration suppression device for cylindrical structure |
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| JP2601917B2 (en) * | 1989-08-24 | 1997-04-23 | 三菱重工業株式会社 | Aerodynamic damping method when installing tower |
| CN101608424A (en) * | 2009-07-07 | 2009-12-23 | 中铁大桥勘测设计院有限公司 | A kind of octahedral tank type steel purlin arc bridge boom |
| CN101781876B (en) * | 2010-03-29 | 2012-08-29 | 中铁二院工程集团有限责任公司 | Vortex-induced vibration inhibiting device of steel trussed beam cable-stayed bridge |
| CN201778279U (en) * | 2010-03-30 | 2011-03-30 | 中铁二院工程集团有限责任公司 | Vortex-induced vibration suppression lightweight guide plate of steel truss cable-stayed bridge |
| CN101824795B (en) * | 2010-03-30 | 2012-02-01 | 中铁二院工程集团有限责任公司 | Installation component of steel truss girder cable-stayed bridge inhibition vortex-induced vibration device |
| CN103590323B (en) * | 2013-11-29 | 2015-12-30 | 西南交通大学 | The square bridge tower wind-induced vibration of chamfering suppresses structure |
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Address after: 300051 No. 239, Yingkou Road, Heping District, Tianjin Patentee after: Tianjin municipal engineering design and Research Institute Co.,Ltd. Address before: 300051 No. 239, Yingkou Road, Heping District, Tianjin Patentee before: TIANJIN MUNICIPAL ENGINEERING DESIGN & Research Institute |