CN102877408A - Anti-collision device of multi-stage falling-proof beam - Google Patents
Anti-collision device of multi-stage falling-proof beam Download PDFInfo
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- CN102877408A CN102877408A CN201210438108XA CN201210438108A CN102877408A CN 102877408 A CN102877408 A CN 102877408A CN 201210438108X A CN201210438108X A CN 201210438108XA CN 201210438108 A CN201210438108 A CN 201210438108A CN 102877408 A CN102877408 A CN 102877408A
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Abstract
The invention discloses an anti-collision device of a multi-stage falling-proof beam. The device consists of a sliding limiting system and a connecting system which are sealed inside a casing system, wherein the sleeve system is formed by welding a fixed end sealing plate, a sliding end sealing plate and a steel sleeve; the sliding limiting system is formed by serially connecting a sliding system I, a sliding system II and a limiting system; the sliding system I is formed by welding a first stage sliding block, an outer connecting rod and an inner connecting rod; the sliding system II is formed by welding a second stage sliding block, an inner sliding steel tube, a limiting block and an outer sliding steel tube in sequence; the limiting system is composed of a tension and compression spring and a steel strand; and the connecting system is composed of a fixed end connector, a connecting sleeve and a sliding end connector. The anti-collision device is installed at an expansion joint of a bridge so as to connect bridge components at the two ends of the expansion joint; the anti-collision device is simple to manufacture, convenient to install and clear in stress mechanism; and the phenomenon that a main beam is dissociated from an abutment because of an earthquake and the problem that adjacent connected main beams collide to each other are effectively prevented.
Description
Technical field:
The present invention relates to a kind of bridge earthquake resistance construction measure, particularly a kind of multistage girder falling collision prevention device.
Background technology:
Can find out that from all previous earthquake 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 fully compressed, and mutually collision occurs, and causes the cracked phenomenon of end of main beam.
The reason that the beam that produces destroys is that the superstructure of bridge and the bearing length between substructure are less, are 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, such 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.
Summary of the invention:
The object of the invention is to guarantee bridge under severe earthquake action, do not fall beam phenomenon and collision phenomenon, avoid occuring sudden brittle fracture.
For reaching above-mentioned purpose, the invention provides a kind of multistage girder falling collision prevention device.This device is arranged at the bridge expanssion joint place, the bridge member at joint stitching two ends.During installation, the single order slide block is arranged on center between limited block and the second order slide block, must guarantees that drawing-pressing spring is in zero stress state simultaneously.
The working mechanism that multistage girder falling collision prevention device adopts is: under normal operation stage of bridge and little shake effect, multistage girder falling collision prevention device does not participate in stressed, when installing the bridge member generation relative displacement at two ends, only rely on the slip of single order slide block to adapt to; Under middle shake effect, when the relative displacement of device two ends bridge member increases, single order slide block and limited block acting in conjunction, drive second order slide block tension by interior slip steel pipe, steel strand are tightened up, and the relative displacement of bridge member is limited, no longer increase, but restrainer, when the relative displacement of device two ends bridge member reduces, single order slide block compression second order slide block, drawing-pressing spring is compressed, the relative displacement of bridge member is limited, and the amplitude of reducing slows down, and can prevent collision; Under large shake effect, when the pulling force that is subject to of device two ends during greater than the bearing capacity of steel strand, steel strand are broken, the stretch function of drawing-pressing spring begins to play a role, and the continuation that has limited the bridge member relative displacement increases, but restrainer, when the pressure that is subject to when the device two ends constantly increases, drawing-pressing spring is constantly compressed, limited the bridge member relative displacement continue reduce, can prevent the collision.
Multistage girder falling collision prevention device of the present invention is comprised of the slip caging system and the connected system that are enclosed within the cannula system, it is characterized in that: described cannula system is by the fixed end shrouding, sliding end shrouding and steel bushing are welded to form, described slip caging system is by sliding system one, sliding system two and caging system are composed in series, described sliding system one is by the single order slide block, outer tie rod and inside connecting rod are welded to form, described sliding system two is by the second order slide block, interior slip steel pipe, limited block, outer slip steel pipe is welded to form successively, described caging system is comprised of drawing-pressing spring and steel strand, weld with fixed end shrouding and second order slide block respectively at described drawing-pressing spring two ends, described steel strand and fixed end shrouding and second order slide block all adopt bulb-end anchorage to carry out anchoring, be provided with pad and pier nose at the steel strand two ends, described connected system is by the fixed end joint, splicing sleeve, the sliding end joint forms, described fixed end joint is welded in the fixed end shrouding outside, described splicing sleeve and sliding end joint adopt welding, adopt with outer tie rod to be threaded.
The multistage advantage of girder falling collision prevention device is: this device all can show the mechanical behavior that adapts to it in the different phase of bridge force-bearing, has guaranteed the mechanical property of bridge in each stage.Under normal operation stage and little shake effect, this device does not participate in stressed, can adapt to the relative displacement of two ends bridge member; Under middle shake effect, this device relies on steel strand to be tightened up restrainer, relies on the compression function of drawing-pressing spring to prevent collision; In large shake effect, this device is broken by steel strand discharges excessive geological process, and stretching and compression function by drawing-pressing spring limit the further increase of relative displacement or reduce restrainer and collision.After geological process finished, the restoring force of drawing-pressing spring can make bridge member have certain reset function.
Description of drawings:
Fig. 1 is the sectional drawing of multistage girder falling collision prevention device.
Fig. 2 is the top view of multistage girder falling collision prevention device.
Fig. 3 is the A-A sectional drawing of multistage girder falling collision prevention device.
Fig. 4 is the B-B sectional drawing of multistage girder falling collision prevention device.
Fig. 5 is the C-C sectional drawing of multistage girder falling collision prevention device.
Fig. 6 is the D-D sectional drawing of multistage girder falling collision prevention device.
Fig. 7 is the E-E sectional drawing of multistage girder falling collision prevention device.
Fig. 8 is the F-F sectional drawing of multistage girder falling collision prevention device.
The specific embodiment:
The application's multistage girder falling collision prevention device, by cannula system, slip caging system and connected system form, formed by the slip caging system and the connected system that are enclosed within the cannula system, described cannula system is by fixed end shrouding 18, sliding end shrouding 6 is welded to form with steel bushing 17, described slip caging system is by sliding system one, sliding system two and caging system are composed in series, described sliding system one is by single order slide block 9, outer tie rod 3 is welded to form with inside connecting rod 8, described sliding system two is by second order slide block 14, interior slip steel pipe 10, limited block 7, outer slip steel pipe 4 is welded to form successively, described caging system is comprised of drawing-pressing spring 15 and steel strand 16, weld with fixed end shrouding 18 and second order slide block 14 respectively at described drawing-pressing spring 15 two ends, described steel strand 16 all adopt bulb-end anchorage to carry out anchoring with fixed end shrouding 18 and second order slide block 14, be provided with pad 13 and pier nose 12 at steel strand 16 two ends, described connected system is by fixed end joint 19, splicing sleeve 2, sliding end joint 1 forms, and described fixed end joint 19 is welded in fixed end shrouding 18 outsides, described splicing sleeve 2 adopts welding with sliding end joint 1, adopts with outer tie rod 3 to be threaded.
In the present embodiment, at first with drawing-pressing spring 15 and fixed end shrouding 18 and 14 welding of second order slide block, then the end with steel strand 16 passes fixed end shrouding 18, the other end passes second order slide block 14, adopt bulb-end anchorage to carry out anchoring, secondly with limited block 7 and interior slip steel pipe 10 welding, inside connecting rod 8 and single order slide block 9 are welded and penetrate in the interior slip steel pipe 10, again outer slip steel pipe 4 is inserted in and welds with limited block 7, weld afterwards inside connecting rod 8 and outer tie rod 3, be inserted in steel bushing 17 and sliding end shrouding 6, then with sliding end shrouding 6, steel bushing 17, fixed end shrouding 18 is welded into integral body, the splicing sleeve 2 that will be welded with at last sliding end joint 1 is tightened with outer tie rod 3, and fixed end joint 19 is welded on the fixed end shrouding 18.
In the present embodiment, outer tie rod 3 arranges screw thread, sliding end joint 1 inner relative set screw thread with sliding end joint 1 junction.
In the present embodiment, structure plate 5 adopts welding with the connected mode of sliding end shrouding 6.
In the present embodiment, stiffener 11 adopts welding with the connected mode of second order slide block 14.
In the present embodiment, adopt bulb-end anchorage to carry out anchoring between steel strand 16 and fixed end shrouding 18 and the second order slide block 14, be provided with pad 13 and pier nose 12 at steel strand 16 two ends.
In the present embodiment, the inwall of steel bushing 17 and interior slip steel pipe 10 all should carry out sanding and polishing and be coated with oil processing.
In the present embodiment, be in installation pad 13 under the zero stress state at drawing-pressing spring 15, adopt pier nose 12 anchoring steel strand 16.
In the present embodiment, the present invention should install when the average temperature of bridge their location, fixed end joint 19 is connected with the sliding end joint respectively adopts pin to be connected with the bridge member at two ends, shrinkage joint, and single order slide block 9 is arranged on center between limited block 7 and the second order slide block 14.
Claims (6)
1. multistage girder falling collision prevention device, formed by the slip caging system and the connected system that are enclosed within the cannula system, it is characterized in that: described cannula system is by fixed end shrouding (18), sliding end shrouding (6) is welded to form with steel bushing (17), described slip caging system is by sliding system one, sliding system two and caging system are composed in series, described sliding system one is by single order slide block (9), outer tie rod (3) is welded to form with inside connecting rod (8), described sliding system two is by second order slide block (14), interior slip steel pipe (10), limited block (7), outer slip steel pipe (4) is welded to form successively, described caging system is comprised of drawing-pressing spring (15) and steel strand (16), weld with fixed end shrouding (18) and second order slide block (14) respectively at described drawing-pressing spring (15) two ends, described steel strand (16) all adopt bulb-end anchorage to carry out anchoring with fixed end shrouding (18) and second order slide block (14), be provided with pad (13) and pier nose (12) at steel strand (16) two ends, described connected system is by fixed end joint (19), splicing sleeve (2), sliding end joint (1) forms, described fixed end joint (19) is welded in fixed end shrouding (18) outside, described splicing sleeve (2) adopts welding with sliding end joint (1), adopts with outer tie rod (3) to be threaded.
2. multistage girder falling collision prevention device according to claim 1 is characterized in that: outer tie rod (3) arranges screw thread, the inner relative set screw thread of splicing sleeve (2) with splicing sleeve (2) junction.
3. multistage girder falling collision prevention device according to claim 1 is characterized in that: sliding end shrouding (6) all arranges structure plate (5) with outer slip steel pipe (4) in the both sides, intersection.
4. multistage girder falling collision prevention device according to claim 1 is characterized in that: second order slide block (14) arranges stiffener (11) with interior slip steel pipe (10) in the junction.
5. multistage girder falling collision prevention device according to claim 1, it is characterized in that: the inwall of steel bushing (17) and interior slip steel pipe (10) all should carry out sanding and polishing and be coated with oil processing.
6. the preparation method of each described multistage girder falling collision prevention device according to claim 1-5, it is characterized in that: at first with drawing-pressing spring (15) and fixed end shrouding (18) and second order slide block (14) welding, then the end with steel strand (16) passes fixed end shrouding (18), the other end passes second order slide block (14), be at drawing-pressing spring (15) under the state of zero stress pad (13) is installed, pier nose (12) is set carries out anchoring, secondly with limited block (7) and interior slip steel pipe (10) welding, inside connecting rod (8) and single order slide block (9) are welded and penetrate in the interior slip steel pipe (10), again with connecting rod (8) and outer tie rod (3) welding, afterwards outer slip steel pipe (4) is inserted in and welds with limited block (7), then be inserted in steel bushing (17) and sliding end shrouding (6), then with sliding end shrouding (6), steel bushing (17), fixed end shrouding (18) is welded into integral body, the splicing sleeve (2) that will be welded with at last sliding end joint (1) is tightened with outer tie rod (3), and fixed end joint (19) is welded on the fixed end shrouding (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210438108.XA CN102877408B (en) | 2012-11-06 | 2012-11-06 | Anti-collision device of multi-stage falling-proof beam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210438108.XA CN102877408B (en) | 2012-11-06 | 2012-11-06 | Anti-collision device of multi-stage falling-proof beam |
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| CN102877408A true CN102877408A (en) | 2013-01-16 |
| CN102877408B CN102877408B (en) | 2014-08-06 |
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| CN201210438108.XA Active CN102877408B (en) | 2012-11-06 | 2012-11-06 | Anti-collision device of multi-stage falling-proof beam |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103255704A (en) * | 2013-05-28 | 2013-08-21 | 招商局重庆交通科研设计院有限公司 | Steel damper anti-collision and anti-girder-dropping device |
| CN103290779A (en) * | 2013-06-15 | 2013-09-11 | 中南大学 | Bridge transverse beam-falling-proof device |
| CN111910505A (en) * | 2020-09-22 | 2020-11-10 | 中国地震局工程力学研究所 | Penetration type multistage energy consumption bridge anti-collision stop block |
| CN112195754A (en) * | 2020-09-25 | 2021-01-08 | 陈松 | Anti-collision connecting device for bridge |
| CN112482196A (en) * | 2020-12-03 | 2021-03-12 | 中国地震局工程力学研究所 | Self-reaction type anti-falling beam structure |
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| KR20090031039A (en) * | 2007-09-21 | 2009-03-25 | 협성실업 주식회사 | Apparatus for preventing bridge from falling, with multiple shock absorbing structure |
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| CN201891074U (en) * | 2009-12-29 | 2011-07-06 | 成都桥源科技有限公司 | Bridge-falling resisting device for bridge |
| CN102251469A (en) * | 2011-04-18 | 2011-11-23 | 深圳大学 | Fall prevention device for bridge |
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| SU1048023A1 (en) * | 1982-03-23 | 1983-10-15 | Тындинская Мерзлотная Станция | Apparatus for damping oscillations of split bridge span structures |
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| KR20090031039A (en) * | 2007-09-21 | 2009-03-25 | 협성실업 주식회사 | Apparatus for preventing bridge from falling, with multiple shock absorbing structure |
| CN201314026Y (en) * | 2008-12-04 | 2009-09-23 | 中铁二院工程集团有限责任公司 | Anti-drop-beam structure for anti-earthquake stay cable of bridge |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255704A (en) * | 2013-05-28 | 2013-08-21 | 招商局重庆交通科研设计院有限公司 | Steel damper anti-collision and anti-girder-dropping device |
| CN103255704B (en) * | 2013-05-28 | 2015-06-03 | 招商局重庆交通科研设计院有限公司 | Steel damper anti-collision and anti-girder-dropping device |
| CN103290779A (en) * | 2013-06-15 | 2013-09-11 | 中南大学 | Bridge transverse beam-falling-proof device |
| CN103290779B (en) * | 2013-06-15 | 2015-05-20 | 中南大学 | Bridge transverse beam-falling-proof device |
| CN111910505A (en) * | 2020-09-22 | 2020-11-10 | 中国地震局工程力学研究所 | Penetration type multistage energy consumption bridge anti-collision stop block |
| CN112195754A (en) * | 2020-09-25 | 2021-01-08 | 陈松 | Anti-collision connecting device for bridge |
| CN112482196A (en) * | 2020-12-03 | 2021-03-12 | 中国地震局工程力学研究所 | Self-reaction type anti-falling beam structure |
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| CN102877408B (en) | 2014-08-06 |
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