CN110306423A - A kind of damper amplifying device of bridge - Google Patents
A kind of damper amplifying device of bridge Download PDFInfo
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- CN110306423A CN110306423A CN201910580158.3A CN201910580158A CN110306423A CN 110306423 A CN110306423 A CN 110306423A CN 201910580158 A CN201910580158 A CN 201910580158A CN 110306423 A CN110306423 A CN 110306423A
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- Prior art keywords
- damper
- bridge
- rigid arm
- amplifying device
- displacement
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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)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a kind of damper amplifying devices of bridge, are related to engineering structure vibration damping field, and damper amplifying device includes: damper, the first rigid arm and the second rigid arm；Damper, the first rigid arm and second rigid arm one end are connected by flexural pivot O, the other end of damper is consolidated with pillar by flexural pivot C, the other end of first rigid arm and the top of girder are consolidated by flexural pivot A, the other end of the second rigid arm and the bottom of girder or are consolidated with crossbeam by flexural pivot B.A kind of damper amplifying device of bridge provided by the invention can amplify the displacement structure of bridge, to change the displacement and power output of damper, damper be made preferably to play the effect of energy-dissipating and shock-absorbing.
Description
Technical field
The present invention relates to engineering structure vibration damping fields, and in particular to a kind of damper amplifying device of bridge.
Background technique
In science of bridge building, due to earthquake natural calamity or the factors such as bridge service life is too long, all it is easy to make winner
Vertical motion occurs for the displacement of girder construction system recurring structure, i.e. girder.However, bridge main body is generally longer, span centre response is larger,
The construction of span centre position is inconvenient, and then leads to not install damper, can not play the role of energy-dissipating and shock-absorbing to it.
In the prior art, it will usually which shock mount is set in bridge structure, to enable bridge in recurring structure position
Certain cushioning effect is played when shifting, however, the relative displacement of shock mount is smaller, when bridge amplitude is smaller, shock mount
Incude insensitive, is not obvious using the cushioning effect that this method is played, is unable to satisfy current demand.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of amplifications of the damper of bridge to fill
It sets, the displacement structure of bridge can be amplified, to change the displacement and power output of damper, play damper preferably
The effect of energy-dissipating and shock-absorbing.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of damper amplifying device of bridge, the bridge include crossbeam, the girder on the crossbeam and
Pillar on the crossbeam, the damper amplifying device include: damper, the first rigid arm and the second rigid arm；
The damper, the first rigid arm and second rigid arm one end are connected by flexural pivot O, the other end of the damper and institute
Pillar to be stated to consolidate by flexural pivot C, the top of the other end and the girder of the first rigid arm is consolidated by flexural pivot A, and described
The other end of two rigid arms is consolidated with the bottom of the girder or with the crossbeam by flexural pivot B.
Based on the above technical solution, the damper, the first rigid arm and the second rigid arm are coplanar.
Based on the above technical solution, the damper, the first rigid arm and the second rigid arm are non-coplanar.
Based on the above technical solution, the damper is oil damper, MR damper or frcition damper.
Based on the above technical solution, the difference of the length of the described first rigid arm and the length of the second rigid arm is greater than institute
State the max architecture displacement of girder.
Based on the above technical solution, the calculation formula of the displacement equations multiple n of the damper are as follows:
N=| OC-O ' C |/AA '
Wherein, OC is the length that bridge recurring structure is displaced front damper, and O ' C is that bridge recurring structure is displaced rear damper
Length, AA ' be bridge occur displacement structure amount.
Based on the above technical solution, if the coordinate that bridge recurring structure is displaced preceding flexural pivot O is origin, bridge occurs
The position of flexural pivot O is denoted as O ' after displacement structure, and position O ' coordinate is (x, y), then the calculation formula of O ' coordinate is as follows:
Wherein, a is that bridge recurring structure is displaced the projected length of preceding first rigid arm along the vertical direction, and α is that bridge is tied
Structure is displaced the angle of preceding first rigid arm and vertical direction, and b is that bridge recurring structure is displaced the throwing of preceding second rigid arm along the vertical direction
Shadow length, β are the angle that bridge recurring structure is displaced preceding second rigid arm and vertical direction, and d is the displacement structure amount that bridge occurs,
A, b is positive number, and α, β are acute angle, and d is real number.
Compared with the prior art, the advantages of the present invention are as follows: the damper amplifying device of bridge of the invention can incite somebody to action
The displacement structure of bridge amplifies, to change the displacement and power output of damper, damper is made preferably to play energy-dissipating and shock-absorbing
Effect
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the damper amplifying device of Bridge of the embodiment of the present invention；
Fig. 2 is the coordinate schematic diagram of the damper amplifying device of Bridge of the embodiment of the present invention.
In figure: 1- crossbeam, 2- girder, 3- pillar, 4- damper, the rigid arm of 5- first, the rigid arm of 6- second.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
Shown in Figure 1, the embodiment of the invention provides a kind of damper amplifying device of bridge, the bridge includes
Crossbeam 1, the girder 2 on the crossbeam 1 and the pillar 3 on the crossbeam 1, which is characterized in that the damper
Amplifying device includes: damper 4, the first rigid arm 5 and the second rigid arm 6.
The damper 4, the first rigid arm 5 and second rigid 6 one end of arm are connected by flexural pivot O, the other end of the damper 4
It being consolidated with the pillar 3 by flexural pivot C, the top of the other end and the girder 2 of the first rigid arm 5 is consolidated by flexural pivot A,
The other end of the second rigid arm 6 is consolidated with the bottom of the girder 2 or with the crossbeam 1 by flexural pivot B.
In actual use, the damper 4, the first rigid arm 5 and the second rigid arm 6 can be coplanar, can also be non-coplanar.No
Plane vibration amplification can be only carried out, space oscillations amplification can also be carried out, to realize that three-dimensional vibrating is displaced in bridge structure
Amplification.
Preferably, the damper 4 is oil damper, MR damper or frcition damper etc., especially suitable for right
The damper of displacement and speed sensitive, can effectively improve damper displacement and power output, damper is made preferably to play energy-dissipating and shock-absorbing
Effect.
Further, the difference of the length of the described first rigid arm 5 and the length of the second rigid arm 6 is greater than the girder 2 most
Big structure displacement, to guarantee that the first rigid arm 5 and the second movable circular trace of rigid arm 6 have intersection point always.
It is shown in Figure 2, when the damper 4, the first rigid arm 5 and the second rigid arm 6 can be coplanar, the damper 4
Displacement equations multiple n calculation formula are as follows:
N=| OC-O ' C |/AA '
Wherein, OC is the length that bridge recurring structure is displaced front damper, and O ' C is that bridge recurring structure is displaced rear damper
Length, AA ' be bridge occur displacement structure amount.
If the coordinate of flexural pivot O is origin before bridge recurring structure is displaced, the position note of flexural pivot O after the displacement of bridge recurring structure
For O ', position O ' coordinate is (x, y), then the calculation formula of O ' coordinate is as follows:
Wherein, a is that bridge recurring structure is displaced the projected length of preceding first rigid arm 5 along the vertical direction, and α is that bridge is tied
The angle of structure displacement preceding first rigid arm 5 and vertical direction, b are that bridge recurring structure is displaced preceding second rigid arm 6 along the vertical direction
Projected length, β are the angle of bridge recurring structure displacement preceding second rigid arm 6 and vertical direction, and d is the displacement structure that bridge occurs
Amount, a, b are positive number, and α, β are acute angle, and d is real number.
According to above-mentioned calculation formula, by adjusting the rigid arm of bridge recurring structure displacement preceding first 5 and the second rigid arm 6 along vertical
The projected length in direction and angle with vertical direction, the different amplification factor of available damper displacement.
In embodiments of the present invention, a=2000mm, b=1000mm, angle α=10 °, β=5 °, A point occur to bottom offset
AA '=d=-10mm solves intersecting point coordinate by two equation of a circles, is closely new damper activity from origin O in two intersection points
Point O ', calculation formula are as follows:
It is (34.46, -3.62) that intersection point O ' coordinate, which can be acquired, by machine solution equation, and damper displacement is -34.46mm,
Displacement equations multiple reaches 3.45 times.
Analysis is it is found that amplification factor influence factor mainly includes length, angle α and the β of the first rigid arm 5 and the second rigid arm 6
Size and the size of displacement structure amount d that occurs of bridge, when design should comprehensively consider parameters to the shadow of amplification coefficient
It rings.It keeps other parameters constant, analyzes influence such as table 1 of the size for the displacement structure amount d that bridge occurs to amplification factor n respectively
Shown, amplification coefficient can reach 3 times or more.
Influence of the size of 1 displacement structure amount d of table to amplification factor n
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (7)
1. a kind of damper amplifying device of bridge, the bridge includes crossbeam (1), the girder on the crossbeam (1)
(2) and be set to the crossbeam (1) on pillar (3), which is characterized in that the damper amplifying device includes: damper
(4), the first rigid arm (5) and the second rigid arm (6)；
The damper (4), the first rigid arm (5) and second rigid arm (6) one end are connected by flexural pivot O, the damper (4) it is another
One end is consolidated with the pillar (3) by flexural pivot C, is passed through at the top of the other end of the first rigid arm (5) and the girder (2)
Flexural pivot A consolidation, the other end of the second rigid arm (6) and the bottom of the girder (2) or passes through flexural pivot with the crossbeam (1)
B consolidation.
2. the damper amplifying device of bridge as described in claim 1, it is characterised in that: the damper (4), first are just
Arm (5) and the second rigid arm (6) are coplanar.
3. the damper amplifying device of bridge as described in claim 1, it is characterised in that: the damper (4), first are just
Arm (5) and the second rigid arm (6) are non-coplanar.
4. the damper amplifying device of bridge as described in claim 1, it is characterised in that: the damper (4) is oil resistance
Buddhist nun's device, MR damper or frcition damper.
5. the damper amplifying device of bridge as described in claim 1, it is characterised in that: the length of the first rigid arm (5)
The max architecture that the difference of degree and the length of the second rigid arm (6) is greater than the girder (2) is displaced.
6. the damper amplifying device of bridge as claimed in claim 2, it is characterised in that: the displacement of the damper (4)
The calculation formula of amplification factor n are as follows:
N=| OC-O ' C |/AA '
Wherein, OC is the length that bridge recurring structure is displaced front damper, and O ' C is the length that bridge recurring structure is displaced rear damper
Degree, AA ' are the displacement structure amount that bridge occurs.
7. the damper amplifying device of bridge as claimed in claim 6, it is characterised in that: before setting the displacement of bridge recurring structure
The coordinate of flexural pivot O is origin, and the position of flexural pivot O is denoted as O ' after the displacement of bridge recurring structure, and position O ' coordinate is (x, y), then O '
The calculation formula of coordinate is as follows:
Wherein, a is that bridge recurring structure is displaced the projected length of preceding first rigid arm (5) along the vertical direction, and α is bridge recurring structure
It is displaced the angle of preceding first rigid arm (5) and vertical direction, b is that bridge recurring structure is displaced preceding second rigid arm (6) along the vertical direction
Projected length, β is the angle that bridge recurring structure is displaced preceding second rigid arm (6) and vertical direction, d for bridge generation structure
Displacement, a, b are positive number, and α, β are acute angle, and d is real number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910580158.3A CN110306423B (en) | 2019-06-28 | 2019-06-28 | Damper amplifying device for bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910580158.3A CN110306423B (en) | 2019-06-28 | 2019-06-28 | Damper amplifying device for bridge |
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| CN110306423A true CN110306423A (en) | 2019-10-08 |
| CN110306423B CN110306423B (en) | 2021-03-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112064492A (en) * | 2020-08-17 | 2020-12-11 | 中铁大桥局集团有限公司 | Vertical vibration damping of girder and vertical damping device and large-span bridge |
| CN112064490A (en) * | 2020-08-17 | 2020-12-11 | 中铁大桥局集团有限公司 | I-shaped steel beam vibration damper and I-shaped steel combination beam |
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| CN108824923A (en) * | 2018-08-29 | 2018-11-16 | 唐山铭嘉建筑设计咨询有限公司 | A kind of Double damping device amplifying device |
| CN109403488A (en) * | 2018-11-13 | 2019-03-01 | 华中科技大学 | A kind of radial type supporting damping device vibration insulating system and its vibration damping efficiency estimation method |
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| KR20140069694A (en) * | 2012-11-29 | 2014-06-10 | 한국건설기술연구원 | Brace damping system having connection for preventing out plane buckling |
| CN204781415U (en) * | 2015-07-13 | 2015-11-18 | 贵州正业工程技术投资有限公司 | Attenuator amplification device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112064492A (en) * | 2020-08-17 | 2020-12-11 | 中铁大桥局集团有限公司 | Vertical vibration damping of girder and vertical damping device and large-span bridge |
| CN112064490A (en) * | 2020-08-17 | 2020-12-11 | 中铁大桥局集团有限公司 | I-shaped steel beam vibration damper and I-shaped steel combination beam |
| CN112064492B (en) * | 2020-08-17 | 2022-03-18 | 中铁大桥局集团有限公司 | Vertical vibration damping of girder and vertical damping device and large-span bridge |
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| CN110306423B (en) | 2021-03-02 |
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