CN103255704B - Steel damper anti-collision and anti-girder-dropping device - Google Patents
Steel damper anti-collision and anti-girder-dropping device Download PDFInfo
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- CN103255704B CN103255704B CN201310204027.8A CN201310204027A CN103255704B CN 103255704 B CN103255704 B CN 103255704B CN 201310204027 A CN201310204027 A CN 201310204027A CN 103255704 B CN103255704 B CN 103255704B
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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
Technical field
The present invention relates to bridge earthquake resistance device, particularly a kind of device adopting damping element to collide to prevent bridge or come off.
Background technology
As can be seen from all previous earthquake, the mode of failure that the bridge construction generation frequency is the highest is beam destruction and the impact wreckage of falling.The beam that falls destroys its substructure of superstructure and supporting referring to bridge and departs from, and namely girder is from bridge pier or Abutment disengaging, cause girder unsettled, fracture, or the phenomenon of falling.Impact wreckage refer to adjacent between bridge superstructure, the space namely between girder is fully compressed, occur mutually collide, cause the phenomenon that end of main beam is cracked.The reason producing beam destruction is that the bearing length between the superstructure of bridge and substructure is less, is not enough to tackle the excessive earthquake displacement of superstructure.But if according to earthquake analysis result, bearing length is set, often cause substructure oversize, less economical.Produce the reason of impact wreckage be adjacent between the asynchronism of bridge superstructure motion.The asynchronism of motion is almost inevitable, this is because the dynamic characteristics of adjacent two bridges always there are differences, the motor pattern under geological process is also not quite similar.In bridge earthquake resistance field, the research for anti-fall girder apparatus is more, but is mostly limited to stiffening member, as guy of twisted steel cable or rigidity chain.When stiffening member plays a role, structure stress suddenly increases, and can cause connecting portion generation local failure, and then cause anti-fall girder apparatus to lose efficacy.Research for collision prevention device is mostly limited to the collision between girder and cross spacing block, the collision between the adjacent girder of shorter mention.
For above-mentioned deficiency, number of patent application is that the anti-collision device of multi-stage falling-proof beam of 201210438108.X attempts to solve the problems of the technologies described above, its action principle is the relative displacement built to slow down and to limit bridge by the cushioning effect of spring, and to overcome, adopting is rigidly connected builds the problem of the connecting portion generation local failure caused.But, proved by simulated experiment and interpretation of result, this structure still has the following disadvantages: the first, and shock absorbing effect when adopting spring to play collision or to stretch, because it is elastic deformation, and non-plastic deformation, its poor stability, crashproof anti-fall effect is not ideal enough, easily causes the man-made further destroy of bridge, reason is to adopt spring just to change the form (kinetic energy produced by collision is converted to the elastic potential energy of spring) of energy, and do not play energy-absorbing, the effect of even energy dissipating of consuming energy.The second, adopt multistage slip caging system, complex structure, cost of manufacture is lower.3rd, undertaken spacing by camber of spring and steel strand during stretching, only lean on camber of spring to be the elastic potential energy of spring by Conversion of Energy during compression, do not form hysteretic energy effect, compare relative to huge bridge construction kinergety, the energy of conversion is very limited.
Summary of the invention
In view of this, the object of this invention is to provide a kind of steel damping anticollision anti-fall girder apparatus, adopt damped part to consume and to absorb bridge Impact energy, improve crashproof let-down effect and stability, avoid man-made further destroy occurs.
The object of the invention is to be realized by following technological means: a kind of steel damping anticollision anti-fall girder apparatus, comprise cylinder and be fixedly installed on left cover and the right cover plate at cylinder two ends; In cylinder, damping system is set, one end of damping system is fixedly connected on right cover plate, the other end is fixedly connected with slide link, and the free end of slide link passes left cover and extends to outside cylinder, and both sides slide link being positioned at left cover arrange outer postive stop baffle and postive stop baffle; Stationary links is fixedly connected with outside described right cover plate.
Further, described damping system is made up of damper; The ribs that described damper comprises outer ring, inner ring and is evenly arranged between outer ring and 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 multiple damper, and the plane at adjacent two damper places is mutually vertical.
Further, described outer ring, inner ring and ribs are made by the damping material that damping ratio is 0.03-0.05.
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 is all 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 cylinder two ends; In cylinder, damping system is set, one end of damping system is fixedly connected on right cover plate, the other end is fixedly connected with slide link, and the free end of slide link passes left cover and extends to outside cylinder, and both sides slide link being positioned at left cover arrange outer postive stop baffle and postive stop baffle; Stationary links is fixedly installed outside described right cover plate.Compared with the elasticity let-down collision prevention devices such as existing employing spring, 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, first by slide link and stationary links, power transmission is acted in damping system, damping system is played damping action by compressing or stretching, while effective limiting displacement continues to occur, damping system consumption and absorb large energy, reduce even to eliminate damping system to the reaction force of bridge, make bridge no longer stressed and static, thus substantially increase the stability of integral bridge, effectively reduce the destructiveness of earthquake etc., crashproof anti-fall effect is very good.
Second, existing number of patent application is the anti-collision device of multi-stage falling-proof beam of 201210438108.X, when there is less displacement between bridge, all can not there is useful effect in the spring in it even positive stop, the displacement of certain distance can be there is between bridge, after spring and positive stop really effect occur, between bridge, in fact create larger displacement, have a strong impact on crashproof anti-fall effect; And anticollision anti-drop device of the present invention, by erection support, it is firmly fixed between two bridges during use, when there is relative displacement between bridge, rightabout effect can be there is immediately in it, the continuation of restriction bridge displacement occurs, after bridge is by actual limiting displacement, the displacement that bridge occurs greatly reduces compared with the former, and crashproof anti-fall effect is fairly obvious.
3rd, compared with the anti-collision device of multi-stage falling-proof beam being 201210438108.X with existing number of patent application, structure is simple, easy to manufacture, and " node " between adjacent component is less, is conducive to the bulk strength improving crashproof anti-drop device further.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is that A-A in Fig. 1 is to sectional view;
Fig. 3 is the structural representation of damper in the present invention.
Detailed description of the invention
Below with reference to accompanying drawing, the present invention is described in detail, as shown in the figure: the steel damping anticollision anti-fall girder apparatus of the present embodiment, comprises cylinder 6 and the left cover 3 and the right cover plate 8 that are fixedly installed on cylinder two ends; Damping system 7 is set in cylinder, one end of damping system is fixedly connected on right cover plate 8, the other end is fixedly connected with slide link 4, and the free end of slide link passes left cover 3 and extends to outside cylinder, and both sides slide link 4 being positioned at left cover 3 arrange outer postive stop baffle 2 and postive stop baffle 5; Stationary links 9 is fixedly connected with outside described right cover plate.Wherein, described damping system is made up of damper; The ribs 7b that described damper comprises outer ring 7a, inner ring 7d and is evenly arranged between outer ring and inner ring, described outer ring, inner ring and ribs are made by damping material; Repeatedly verified by theory analysis binding tests, the present invention preferably adopt damping ratio be 0.03-0.05 damping material, damping energy-absorbing function can be played to greatest extent; Specifically can adopt Q235 steel, chrome-moly steel or 2Cr13 stainless steel, buy by market and obtain.
As the further improvement of technique scheme, 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 Modling model analysis and experimental verification repeatedly, optimize the parameters such as R, r, t, d and rad, energy-absorbing effect is ideal, and combination property is superior, and suitable selection installs the bridge that quantity is applicable to existing various model.
As the further improvement of technique scheme, described damping system is in series by multiple damper, and the plane at adjacent two damper places is mutually vertical.Be arranged vertically advantageously stressed in device stability, not easily generating plane is out of shape outward, is more conducive to the hysteretic energy effect playing steel damping element.
As the further improvement of technique scheme, the outside of described outer ring 7a is symmetrical arranged two stress surface 7c.Arranging stress surface makes damper be that face is stressed when being subject to clashing into, instead of puts stressed, stress equalization.
As the further improvement of technique scheme, the free end of described slide link 4 and stationary links 9 is all connected with erection support 1.Be convenient to fix, install simple, easy to use.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (8)
1. a 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 cylinder, one end of damping system is fixedly connected on right cover plate (8), the other end is fixedly connected with slide link (4), the free end of slide link passes left cover (3) and extends to outside cylinder, and both sides slide link (4) being positioned at left cover (3) arrange outer postive stop baffle (2) and postive stop baffle (5); Stationary links (9) is fixedly connected with outside described right cover plate; Described damping system is made up of damper; The ribs (7b) that described damper comprises outer ring (7a), inner ring (7d) and is evenly arranged between outer ring and inner ring.
2. steel damping anticollision anti-fall girder apparatus according to claim 1, it is characterized in that: described ribs (7b) is circular arc, radian is π/3-π.
3. steel damping anticollision anti-fall girder apparatus according to claim 1, 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.
4. steel damping anticollision anti-fall girder apparatus according to claim 1, it is characterized in that: described damping system is in series by multiple damper, the plane at adjacent two damper places is mutually vertical.
5. steel damping anticollision anti-fall girder apparatus according to claim 1, is characterized in that: the damping material that described outer ring, inner ring and ribs are 0.03-0.05 by damping ratio is made.
6. steel damping anticollision anti-fall girder apparatus according to claim 5, is characterized in that: described damping material adopts Q235 steel, chrome-moly steel or 2Cr13 stainless steel.
7. steel damping anticollision anti-fall girder apparatus according to claim 1, is characterized in that: the outside of described outer ring (7a) is symmetrical arranged two stress surfaces (7c).
8. steel damping anticollision anti-fall girder apparatus according to claim 1, is characterized in that: the free end of described slide link (4) and stationary links (9) is all connected with erection support (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310204027.8A CN103255704B (en) | 2013-05-28 | 2013-05-28 | Steel damper anti-collision and anti-girder-dropping device |
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| CN201310204027.8A CN103255704B (en) | 2013-05-28 | 2013-05-28 | Steel damper anti-collision and anti-girder-dropping device |
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| CN103255704A CN103255704A (en) | 2013-08-21 |
| CN103255704B true CN103255704B (en) | 2015-06-03 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106049253B (en) * | 2016-05-11 | 2018-10-02 | 清华大学 | A kind of construction method for the longitudinal connecting structure for preventing reinforced concrete simple-supported beam bridge from falling off |
| CN106351114B (en) * | 2016-09-26 | 2019-07-05 | 石家庄铁道大学 | A kind of multistage antidetonation bridge anticollision and fall girder apparatus |
| CN106639469B (en) * | 2016-11-25 | 2022-01-18 | 西安建筑科技大学 | Staged yield type mild steel damper |
| 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 |
| CN112523070B (en) * | 2020-12-16 | 2022-05-27 | 重庆交通大学 | Public road bridge roof beam stop device that falls is prevented to bridge |
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|---|---|---|---|---|
| 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 |
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2013
- 2013-05-28 CN CN201310204027.8A patent/CN103255704B/en active Active
Patent Citations (6)
| 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 |
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