CN103255704A - Steel damper anti-collision and anti-girder-dropping device - Google Patents

Steel damper anti-collision and anti-girder-dropping device Download PDF

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Publication number
CN103255704A
CN103255704A CN2013102040278A CN201310204027A CN103255704A CN 103255704 A CN103255704 A CN 103255704A CN 2013102040278 A CN2013102040278 A CN 2013102040278A CN 201310204027 A CN201310204027 A CN 201310204027A CN 103255704 A CN103255704 A CN 103255704A
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steel
damping
cover plate
cylinder
damper
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CN2013102040278A
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CN103255704B (en
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耿波
张茜
王福敏
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China Merchants Chongqing Communications Research and Design Institute Co Ltd
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China Merchants Chongqing Communications Research and Design Institute Co Ltd
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Abstract

The invention discloses a steel damper anti-collision and anti-girder-dropping device. The steel damper anti-collision and anti-girder-dropping device comprises a cylinder, a left cover plate and a right cover plate, wherein the left cover plate and the right cover plate are fixedly arranged at two ends of the cylinder. A damping system is arranged in the cylinder, one end of the damping system is fixedly connected on the right cover plate, and the other end of the damping system is fixedly connected with a sliding connecting rod. The free end of the sliding connecting rod penetrates through the left cover plate and stretches outside the cylinder, an outer limiting baffle and an inner limiting baffle are arranged on two sides, located on the left cover plate, of the sliding connecting rod, and a fixed connecting rod is fixedly arranged on the outer side of the right cover plate. Due to the fact that a damper is used for absorbing energy, stability of a whole bridge is greatly improved, destructiveness of an earthquake and the like is effectively reduced, and anti-collision and anti-dropping effects are ideal. The steel damper anti-collision and anti-girder-dropping device is simple in structure and easy to manufacture. The whole strength of the anti-collision and anti-girder-dropping device is further improved due to the fact that the number of pitch points among adjacent parts is small.

Description

Steel damping anticollision anti-fall girder apparatus
Technical field
The present invention relates to the bridge earthquake resistance device, particularly a kind of damping element that adopts is to prevent bridge collision or the device that comes off.
Background technology
From all previous earthquake as can be seen, the mode of failure that the bridge construction generation frequency is the highest destroys and impact wreckage for the beam that falls.The beam that falls destroys its substructure of superstructure and supporting refer to bridge and breaks away from, and namely girder breaks away from from bridge pier or abutment, cause girder unsettled, fracture or the phenomenon of falling.Impact wreckage refers to the bridge superstructure between adjacent, and namely the space between the girder is compressed fully, and collision mutually takes place, and causes the cracked phenomenon in girder end.The reason that the beam that produces destroys is that the superstructure of bridge and the bearing length between substructure are less, is not enough to tackle the excessive earthquake displacement of superstructure.If yet according to the earthquake analysis result bearing length is set, tend to cause substructure oversize, less economical.The reason that produces impact wreckage is the asynchronism of the bridge superstructure motion between adjacent.The asynchronism of motion almost is inevitably, and this is that the motor pattern under geological process also is not quite similar because the dynamic characteristics of adjacent two bridges always there are differences.In the bridge earthquake resistance field, more for the research of anti-fall girder apparatus, but mostly be limited to stiffening member, as guy of twisted steel cable or rigidity chain.When stiffening member played a role, structure stress suddenly increased, and can cause connecting portion generation local failure, and then caused anti-fall girder apparatus to lose efficacy.Mostly be limited to collision between girder and the cross spacing block, the collision between the adjacent girder of shorter mention for the research of collision prevention device.
At above-mentioned deficiency, number of patent application is that anti-fall beam collision prevention device of the multistage of 201210438108.X is attempted to solve the problems of the technologies described above, its action principle be cushioning effect by spring to slow down and to limit the relative displacement that bridge makes up, adopting is rigidly connected makes up the problem of the connecting portion generation local failure that causes to overcome.But, prove by simulated experiment and interpretation of result, this structure still has the following disadvantages: the first, and the bumper and absorbing shock effect when adopting spring with performance collision or stretching is because it is elastic deformation, but not plastic strain, its poor stability, crashproof anti-fall effect is not ideal enough, causes the secondary of bridge to destroy easily, the form that reason is to adopt spring just to change energy (kinetic energy that is produced by collision is converted to the elastic potential energy of spring), and do not play the effect of energy-absorbing, power consumption even energy dissipating.The second, adopt multistage slip caging system, complex structure, cost of manufacture is lower.The 3rd, undertaken spacingly during stretching by camber of spring and steel strand, only depend on camber of spring that energy is converted into the elastic potential energy of spring during compression, do not form the hysteretic energy effect, to compare with respect to huge bridge construction kinergety, the energy of conversion is very limited.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of steel damping anticollision anti-fall girder apparatus, adopt damped part to consume and to absorb the bridge Impact energy, improve crashproof let-down effect and stability, avoid taking place secondary and destroy.
The objective of the invention is to realize by following technological means: a kind of steel damping anticollision anti-fall girder apparatus comprises cylinder and the left cover and the right cover plate that are fixedly installed on the cylinder two ends; Damping system is set in the cylinder, one end of damping system is fixedly connected on the right cover plate, the fixedly connected slide link of the other end, the free end of slide link pass left cover and extend to outside the cylinder, and the both sides that are positioned at left cover on the slide link arrange outer postive stop baffle and postive stop baffle; The fixedly connected stationary links in the described right cover plate outside.
Further, described damping system is made of damper; Described damper comprises outer ring, inner ring and evenly is arranged on ribs between outer ring and the inner ring.
Further, described ribs is circular arc, and radian is π/3-π.
Further, the radius R of described damper outer ring is 5-25cm, and the radius r of inner ring is 2-15cm; The radial thickness t of outer ring and inner ring is 0.4-2cm; The thickness d of damper is 2-30cm.
Further, described damping system is in series by a plurality of dampers, and the plane at adjacent two damper places is vertical mutually.
Further, described outer ring, inner ring and ribs are that 0.03-0.05 damping material is made by damping ratio.
Further, described damping material adopts Q235 steel, chrome-moly steel or 2Cr13 stainless steel.
Further, the outside of described outer ring is symmetrical arranged two stress surfaces.
Further, the free end of described slide link and stationary links all is connected with erection support.
Beneficial effect of the present invention: steel damping anticollision anti-fall girder apparatus of the present invention comprises cylinder and the left cover and the right cover plate that are fixedly installed on the cylinder two ends; Damping system is set in the cylinder, one end of damping system is fixedly connected on the right cover plate, the fixedly connected slide link of the other end, the free end of slide link pass left cover and extend to outside the cylinder, and the both sides that are positioned at left cover on the slide link arrange outer postive stop baffle and postive stop baffle; The described right cover plate outside fixedly installs stationary links.Compare with having elasticity let-down collision prevention devices such as adopting spring now, beneficial effect has:
First, operating principle of the present invention is: be fixed between two bridges by erection support, when two bridge generation relative displacements, at first by slide link and stationary links with the power transfer function on damping system, damping system is by the compressed or performance damping action that stretches, when effectively limiting displacement continues to take place, damping system consumption and absorb big energy, reduce even eliminate damping system to the reaction force of bridge, make bridge no longer stressed and static, thereby improved the stability of integral bridge greatly, effectively reduced the destructiveness of earthquake etc., crashproof anti-fall effect is very good.
Second, existing number of patent application is anti-fall beam collision prevention device of the multistage of 201210438108.X, in when, between bridge less displacement taking place, useful effect all can not take place in spring even positive stop in it, the displacement of certain distance can take place between the bridge, after effect really takes place in spring and positive stop, in fact produced bigger displacement between the bridge, had a strong impact on crashproof anti-fall effect; And anticollision anti-drop device of the present invention, by erection support it firmly is fixed between two bridges during use, in when, between the bridge relative displacement taking place when, rightabout effect can take place in immediately, the continuation of restriction bridge displacement takes place, after bridge was by the physical constraints displacement, the displacement that bridge takes place was compared greatly with the former and is reduced, and crashproof anti-fall effect is fairly obvious.
The 3rd, be that the anti-fall beam collision prevention device of multistage of 201210438108.X is compared with existing number of patent application, simple in structure, easy to manufacture, and also " node " between the adjacent component is less, is conducive to further improve the bulk strength of crashproof anti-drop device.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is that A-A among Fig. 1 is to sectional view;
Fig. 3 is the structural representation of damper among the present invention.
The specific embodiment
The present invention is described in detail below with reference to accompanying drawing, and as shown in the figure: the steel damping anticollision anti-fall girder apparatus of present embodiment comprises cylinder 6 and the left cover 3 and the right cover plate 8 that are fixedly installed on the cylinder two ends; Damping system 7 is set in the cylinder, one end of damping system is fixedly connected on the right cover plate 8, the fixedly connected slide link 4 of the other end, the free end of slide link passes left cover 3 and extends to outside the cylinder, and the both sides that are positioned at left cover 3 on the slide link 4 arrange outer postive stop baffle 2 and postive stop baffle 5; The fixedly connected stationary links 9 in the described right cover plate outside.Wherein, described damping system is made of damper; Described damper comprises outer ring 7a, inner ring 7d and evenly is arranged on ribs 7b between outer ring and the inner ring that described outer ring, inner ring and ribs are made by damping material; In conjunction with test checking repeatedly, it is 0.03-0.05 damping material that the present invention preferably adopts damping ratio, can bring into play the damping energy-absorbing function to greatest extent by theory analysis; Specifically can adopt Q235 steel, chrome-moly steel or 2Cr13 stainless steel, can get by the market purchase.
As further improvement in the technical proposal, the radius R of described damper outer ring 7a is 5-25cm, specifically gets R=8cm; The radius r of inner ring 7d is 2-15cm; Specifically get r=7cm; The radial thickness t of outer ring and inner ring is 0.4-2cm, specifically gets t=1cm; The thickness d of damper is 2-30cm; Specifically get d=6cm.Described ribs 7b is circular arc, and radian rad is π/3-π, specifically gets rad=0.5 π.By setting up model analysis and experimental verification repeatedly, optimize parameters such as R, r, t, d and rad, energy-absorbing effect is very desirable, and combination property is superior, and suitable selection is installed quantity applicable to the bridge of existing various models.
As further improvement in the technical proposal, described damping system is in series by a plurality of dampers, and the plane at adjacent two damper places is vertical mutually.Be arranged vertically and be conducive to the stressed stability of device more, be difficult for generating plane and be out of shape outward, more be conducive to bring into play the hysteretic energy effect of steel damping element.
As further improvement in the technical proposal, the outside of described outer ring 7a is symmetrical arranged two stress surface 7c.Stress surface is set, and to make damper be that face is stressed when being subjected to clashing into, rather than put stressed, stress equalization.
As further improvement in the technical proposal, the free end of described slide link 4 and stationary links 9 all is connected with erection support 1.Be convenient to fix, install simple, easy to use.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (9)

1. steel damping anticollision anti-fall girder apparatus is characterized in that: comprise cylinder (6) and be fixedly installed on left cover (3) and the right cover plate (8) at cylinder two ends; Damping system (7) is set in the cylinder, one end of damping system is fixedly connected on the right cover plate (8), the fixedly connected slide link of the other end (4), the free end of slide link passes left cover (3) and extends to outside the cylinder, and the both sides that are positioned at left cover (3) on the slide link (4) arrange outer postive stop baffle (2) and postive stop baffle (5); The described right cover plate outside fixedly connected stationary links (9).
2. steel damping anticollision anti-fall girder apparatus according to claim 1, it is characterized in that: described damping system is made of damper; Described damper comprises outer ring (7a), inner ring (7d) and evenly is arranged on ribs (7b) between outer ring and the inner ring.
3. steel damping anticollision anti-fall girder apparatus according to claim 2, it is characterized in that: described ribs (7b) is circular arc, and radian is π/3-π.
4. steel damping anticollision anti-fall girder apparatus according to claim 3, it is characterized in that: the radius R of described damper outer ring (7a) is 5-25cm, the radius r of inner ring (7d) is 2-15cm; The radial thickness t of outer ring and inner ring is 0.4-2cm; The thickness d of damper is 2-30cm.
5. steel damping anticollision anti-fall girder apparatus according to claim 2, it is characterized in that: described damping system is in series by a plurality of dampers, and the plane at adjacent two damper places is vertical mutually.
6. steel damping anticollision anti-fall girder apparatus according to claim 2 is characterized in that: described outer ring, inner ring and ribs are that 0.03-0.05 damping material is made by damping ratio.
7. steel damping anticollision anti-fall girder apparatus according to claim 6 is characterized in that: described damping material employing Q235 steel, chrome-moly steel or 2Cr13 stainless steel.
8. steel damping anticollision anti-fall girder apparatus according to claim 2, it is characterized in that: the outside of described outer ring (7a) is symmetrical arranged two stress surfaces (7c).
9. steel damping anticollision anti-fall girder apparatus according to claim 1, it is characterized in that: the free end of described slide link (4) and stationary links (9) all is connected with erection support (1).
CN201310204027.8A 2013-05-28 2013-05-28 Steel damper anti-collision and anti-girder-dropping device Active CN103255704B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106049253A (en) * 2016-05-11 2016-10-26 清华大学 Longitudinal connecting structure for preventing reinforced concrete simply-supported beam bridge from falling and construction method of longitudinal connecting structure
CN106351114A (en) * 2016-09-26 2017-01-25 石家庄铁道大学 Multi-level anti-seismic device capable of preventing bridge from colliding and falling
CN106639469A (en) * 2016-11-25 2017-05-10 西安建筑科技大学 Phased yield type mild steel damper
CN106835945A (en) * 2017-01-09 2017-06-13 株洲时代新材料科技股份有限公司 Girder falling buffer system in girder falling buffer unit and method, overhead rail
CN107338721A (en) * 2017-06-26 2017-11-10 长沙市市政工程有限责任公司 Steel damps anti-fall girder apparatus
CN108978445A (en) * 2018-09-27 2018-12-11 河南省交通规划设计研究院股份有限公司 Energy dissipating Self-resetting bridge shockproof structure
CN112523070A (en) * 2020-12-16 2021-03-19 重庆交通大学 Public road bridge roof beam stop device that falls is prevented to bridge

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10195821A (en) * 1997-01-14 1998-07-28 Kawaguchi Kinzoku Kogyo Kk Bridge falling prevention device
CN101696564A (en) * 2009-10-21 2010-04-21 东南大学 Compound energy consumption one-way bridge support
CN102797220A (en) * 2012-08-22 2012-11-28 南京工业大学 Novel energy-consumption beam falling prevention device
CN102877408A (en) * 2012-11-06 2013-01-16 北京国道通公路设计研究院股份有限公司 Anti-collision device of multi-stage falling-proof beam
CN102912876A (en) * 2012-11-05 2013-02-06 沈阳建筑大学 Inner and outer ring type lead extrusion damper
CN203295963U (en) * 2013-05-28 2013-11-20 招商局重庆交通科研设计院有限公司 Bridge steel damping anti-collision anti-dropping device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10195821A (en) * 1997-01-14 1998-07-28 Kawaguchi Kinzoku Kogyo Kk Bridge falling prevention device
CN101696564A (en) * 2009-10-21 2010-04-21 东南大学 Compound energy consumption one-way bridge support
CN102797220A (en) * 2012-08-22 2012-11-28 南京工业大学 Novel energy-consumption beam falling prevention device
CN102912876A (en) * 2012-11-05 2013-02-06 沈阳建筑大学 Inner and outer ring type lead extrusion damper
CN102877408A (en) * 2012-11-06 2013-01-16 北京国道通公路设计研究院股份有限公司 Anti-collision device of multi-stage falling-proof beam
CN203295963U (en) * 2013-05-28 2013-11-20 招商局重庆交通科研设计院有限公司 Bridge steel damping anti-collision anti-dropping device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106049253A (en) * 2016-05-11 2016-10-26 清华大学 Longitudinal connecting structure for preventing reinforced concrete simply-supported beam bridge from falling and construction method of longitudinal connecting structure
CN106351114A (en) * 2016-09-26 2017-01-25 石家庄铁道大学 Multi-level anti-seismic device capable of preventing bridge from colliding and falling
CN106639469A (en) * 2016-11-25 2017-05-10 西安建筑科技大学 Phased yield type mild steel damper
CN106639469B (en) * 2016-11-25 2022-01-18 西安建筑科技大学 Staged yield type mild steel damper
CN106835945A (en) * 2017-01-09 2017-06-13 株洲时代新材料科技股份有限公司 Girder falling buffer system in girder falling buffer unit and method, overhead rail
CN106835945B (en) * 2017-01-09 2018-10-02 株洲时代新材料科技股份有限公司 Girder falling buffer system in girder falling buffer unit and method, overhead rail
CN107338721A (en) * 2017-06-26 2017-11-10 长沙市市政工程有限责任公司 Steel damps anti-fall girder apparatus
CN108978445A (en) * 2018-09-27 2018-12-11 河南省交通规划设计研究院股份有限公司 Energy dissipating Self-resetting bridge shockproof structure
CN112523070A (en) * 2020-12-16 2021-03-19 重庆交通大学 Public road bridge roof beam stop device that falls is prevented to bridge

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