CN105603867B - Multistage self-destruction energy-absorbing buffering formula falling stop boom device - Google Patents
Multistage self-destruction energy-absorbing buffering formula falling stop boom device Download PDFInfo
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- CN105603867B CN105603867B CN201610103404.2A CN201610103404A CN105603867B CN 105603867 B CN105603867 B CN 105603867B CN 201610103404 A CN201610103404 A CN 201610103404A CN 105603867 B CN105603867 B CN 105603867B
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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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Abstract
Multistage self-destruction energy-absorbing buffering formula anti-fall girder apparatus.A kind of device for the multistage self-destruction energy-absorbing buffering formula girder falling for preventing from falling in earthquake or extreme unexpected generation the present invention relates to T beams or box beam for being mainly used in beam bridge in road and bridge engineering.Its structure is, the preset mounting hole along bridge longitudinal direction of beam body diaphragm plate in beam slab end, load girder falling pull bar in mounting hole, the two ends of girder falling pull bar are respectively charged into extrusion pressing type self-destruction energy absorber, and the end face of self-destruction energy absorber keeps gap by the interlocking double nut at girder falling pull bar two ends, fall the end face that beam-like state interlocking double nut presses self-destruction energy absorber.The present invention is hit Rapid Damage using energy absorber and consumed energy and concedes buffer distance in time, and its simple structure can reach the effect that low-carbon environment-friendly, difficulty of construction are low, operation is simple, cost is low, material is easily obtained, secondary injury is small.
Description
Technical field
The present invention relates to a kind of T beams or box beam for being mainly used in beam bridge in road and bridge engineering in earthquake or extreme unexpected generation
When prevent the device of multistage self-destruction energy-absorbing buffering formula falling stop beam that falls, be also applied for other buildings and have to prevent requirement of dropping
Component prevents from collapsing.
Background technology
At present, as construction of road and bridge project significantly increases, bridge operation safety problem refer to new height,
When earthquake or the generation of extreme disaster, it is a big secondary disaster to fall beam.Small shake is clearly proposed in present bridge technology specification
Not bad, middle shake can be repaiied, and the requirement of beam is not fallen during big shake, but being released as defined in this necessarily has corresponding measure means to meet
Implement to require.Fall beam generation between the bridge pier, abutment and bridge plate of beam bridge during generation relative displacement, if displacement exceeds design most
After the mobile range of the big lap of splice, the phenomenon that beam slab one end departs from pier and fallen.Permission is maintained between beam slab and pier
Movement, be a kind of earthquake resistant construction for protecting bridge pier not cut pier total collapse by earthquake wave impact, can avoid bigger destruction show
As.But there is movement just to have the possibility of beam！But as long as there is a kind of device to hold one end of beam when beam slab falls, it is allowed to not
Secondary impact is produced to ground and pier, while it is also to be ensured that itself fails not in beam-ends falling impacts, so that it may which reaching prevents
Fall the purpose of beam, to rescue or repairing offer advantage.
It there is now some anti-fall girder apparatus products gradually releasing, but be all at present ten thousand in these effective anti-fall girder apparatus
The a set of device of first above cost, some employ the pull bar drag-line accessory of cable-stayed bridge or suspension bridge as girder falling pull bar,
It is characterized in complicated expensive, with a bridge 14 sets of calculating, the input of a bridge up to hundreds of thousands to millions of members
It is a kind of obstruction to promoting the use of without coagulating for this technology；Emphasis pull bar intensity, is not provided with the crash energy absorption equipment of effect, can lead
Broken beam body is drawn in dropping process to pull bar and beam body connecting portion and is failed.The simply rubber buffer used in existing device
Pad, but the compression distance of rubber blanket is very limited, rubber buffer is used alone because cannot get the chance that elasticity is recovered, after deformation
Rubber blanket is no cushioning effect.
The content of the invention
In order to overcome the shortcomings of existing anti-fall girder apparatus, it is an object of the invention to provide a kind of suitable for T beams, box beam
Falling stop boom device, it can reach, and low-carbon environment-friendly, difficulty of construction are low, operation is simple, cost is low, material is easily obtained, secondary injury is small
Effect, new bridge construction can be used for again and can be used for bridge maintenance and strengthening.
Realize that above-mentioned purpose of the present invention is adopted the technical scheme that：Beam body diaphragm plate in beam slab end is preset along bridge
Load girder falling pull bar in the mounting hole of longitudinal direction, mounting hole, the two ends of girder falling pull bar are respectively charged into extrusion pressing type self-destruction energy absorber,
And the end face of self-destruction energy absorber keeps gap by the interlocking double nut at girder falling pull bar two ends, and double nut is interlocked when falling beam-like state
In the endface position for pressing self-destruction energy absorber.
Self-destruction energy absorber is column with the level, and column Surface Machining has a series of grooves, and self-destruction energy absorber string
Connection should be held greatly when being applied in combination to big end, and small end is to small end.
Between the self-destruction energy absorber of girder falling pull bar over-assemble and interlocking double nut, self-destruction energy absorber and beam body diaphragm plate it
Between be equipped with backing plate.
The hollow intracavitary for the self-destruction energy absorber arranged in outermost end is provided with brokenly residual cone, and it is shaped as the cone with mesopore
Body.
Rubber buffer is provided between the self-destruction energy absorber and beam body diaphragm plate of girder falling pull bar over-assemble.
The step column of self-destruction energy absorber is cylindric or polygonal column, and a series of grooves on column surface are in axle
To arrangement.
Whole self-destruction energy absorber is included in protective cover.
The present invention technical principle be：Self-destruction energy-absorbing buffering technology falling to transporting by the static beam slab to freely falling body
Held after dynamic beginning, and the moment tensile impact that the heavily loaded beam body not fallen is produced breaks pull bar or draws broken and beam body
The position failure of connection is fallen again, because pulling force at this moment be beam body gravity with impulsive force it is superimposed with joint efforts:
Moment pulling force P=mg+m Δ v/ Δs t.
（m:Beam-ends quality, g:Acceleration of gravity, Δ v:Speed increment, Δ t:Incremental time）.
The velocity variations fallen knowable in formula are bigger or the shorter impulsive force of transformation period is bigger, can substantially exceed weight
Power.Preceding paragraph in formula can not be changed from gravity, only tries consequent impulsive force being minimized, and the method for reducing impact is to prolong
Long velocity variations time, reduction end speed reduce velocity variable.Impulsive force is used for smashing setting by several times by the design of the present invention
Self-destruction energy absorber in a device carrys out consumed energy, and the process for repeatedly smashing moment allows the beam-ends of whereabouts to be segmented because inertia is always in
The movement of falling object reduces stage initial velocity close to the initial stage, relative after segmentation to extend the resultant action time, and uses rubber
Glue cushion pad undertakes the direct impulsive force in the small stage.Anti-fall girder apparatus in the present invention is made up of following five parts：1st, make
The common standard part pull bar for having sufficient intensity with that can be plastically deformed is used as main bearing capacity pull bar.2nd, type self-destroyed energy absorber.Energy-absorbing
Device is step-like column（Two open column shape bodies are formed by stacking）, when the joint face of big column cylinder and small column cylinder is compression
Shear surface, the paxilla after the shear fracture that is stressed is embedded in big cylinder ring bodies, and state is partly ruined in formation.By the effective of shearing face
Thickness can determine that energy absorber breakdown pressure size, be delayed step by step and under using multistage variable-force energy absorber abatement initial impact
Fall, the time-lag action during tandem energy acquisition Top Down Break Down of different bearing capacity blocks.3rd, rubber buffer.Delay self-destruction energy absorber pressure
Burst and short distance secondary impulsive force is produced when damaging, a new wave impact is waited in next energy absorber conquassation momentary recovery elasticity.4th, break
Residual cone.When beam body conduct oneself with dignity it is excessive, it is necessary to bigger buffer distance requirement when, with the broken residual residual circle of energy absorber that will be enclosed on pull bar of boring
Crushing-type can further crush secondary energy-absorbing and reserve secondary buffer space into all-destroyed energy-absorbing.5th, protective cover.Filled using cup
Adorn protective cover and collect self-destruction relic, installed using cup bottom fixed form.
The beneficial effects of the invention are as follows using common standard part pull bar, disposably plastic deformation is drawn to make main bearing capacity
Bar, accessory and material are general, and easy processing easily makes, and double nut locking mechanism ensures pulling force, stops flexible gap, can also prevent people
For missing, long-term work after all metalwork surfaces galvanizing processing；Self-destruction energy absorber material uses brittle metal or nonmetallic
Material makes, and cast iron quality applicability is preferably, non-maintaining in service phase.The columnar hollow of two unequal sections of self-destruction energy absorber
Solid converts pressure into shearing force, is formed by shear surface, changed effective by shear surface between hole and paxilla in huge pillar body
Area can adjust energy absorber by shearing force size, during installation with a variety of compression specifications combine, mutually head to head tail to tail multistage
It is used in series, available for different engineering energy-absorbings, order self-destruction when playing a role.Energy absorber can be kept away using annular residue structure
Exempt from big block part self-destruction material falling from high altitude generation secondary injury Opportunity formation and partly ruin formula energy-absorbing.Residual will can be partly ruined with broken residual cone
Ring body crushing-type, which helps the formula of unmaking, is used for large volume beam body.The metal self-destruction energy absorber of the present invention has been made to break residual design：Surface is set
Have a variety of stress rupture grooves, a separation trough, inside and outside residual ring body fluting distribution is staggered, make it to be decomposed by broken residual cone after conquassation into
The secondary energy-absorbing of row；Rubber buffer is the loop configuration body that two plates press from both sides a glue, and rubber support same life-span, is that mid-term need to be changed
Part；Decorating protective cover is usually used for attractive, decorative, and accessory is not exposed to prevent ageing of rubber, and self-destruction energy absorber is accepted during stress
Chip be allowed to not turn into falling from high altitude thing.
Because girder falling pull bar is inscribed before being made with disposable plastic deformation in stress, its rigidity should not be too big（Such as
The more steel of phosphorus content）, present apparatus usage quantity regard matter regarding beam body constant weight depending on, big quality beam body apply in pulling force mistake
Greatly, device arrangement number should be increased and can not simply increase the bearing capacity of device.
Brief description of the drawings
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is that multistage half self-destruction energy absorption type girder-falling-resisdevice device is used for initial total figure at bridge pier.
Fig. 2 is that multistage full self-destruction energy absorption type girder-falling-resisdevice device is used for the initial total figure of Abutment.
Fig. 3 is state diagram of the present invention when falling beam after half self-destruction energy-absorbing.
Fig. 4 is the state diagram after present invention self-destruction energy-absorbing complete when falling beam.
Fig. 5 is cast iron self-destruction energy absorber exact shape figure of the invention.
In figure, 1. beam slab beam-ends, 2. interlocking double nuts, 3. backing plates, 4. self-destruction energy absorbers, 5. protective covers, 6. beams
Body diaphragm plate, 7. girder falling pull bars, 8. rubber buffers, 9. break residual cone, and 10. fall beam beam-ends, 11. bridge pads, 12. bridge piers
Bent cap, 13. caps.
Embodiment
In Fig. 1, Fig. 2, bridge pad 11 is arranged on pier cap beam 12 or cap 13, beam slab beam-ends 1 and falls beam beam-ends 10
Normal mounting is on bridge pad 11.Beam body diaphragm plate 6 is beam slab beam-ends 1 and falls a composition portion in the structure of beam beam-ends 10
Point.Girder falling pull bar 7 is arranged in the mounting hole of two beam body diaphragm plates 6, and assembly method is to install decoration protective cover 5 at first,
A set of rubber buffer 8 is installed in opposite side again.In fig. 2, the device at abutment position is placed in, because there is backfill on platform behind side,
Self-destruction energy absorber 4 is all installed in the side of beam body diaphragm plate 6；In Fig. 1, the device at bridge pier position, self-destruction energy absorber 4 are placed in
The two ends of beam body diaphragm plate 6 can be separately mounted to.Self-destruction energy absorber more than 4 need to be held greatly when being installed in series to big end, and small end is to small
End is installed, and backing plate 3 is padded in the other end of self-destruction energy absorber 4 respectively.As during all-destroyed combination outside the self-destruction energy absorber 4 of outermost end
Side installs a broken residual cone 9 additional.Interlocking double nut 2 is respectively mounted at the two ends of girder falling pull bar 7, and is mutually locked.Interlocking
Girder falling pull bar 7 after double nut 2 is locked go here and there equal retention gap between each accessory, it is ensured that beam body can freely stretch.
In figure 3, when earthquake occurs, if beam slab beam-ends 1 and fall beam beam-ends 10 produce it is overall along after the axial displacement of bridge,
Occur that a beam-ends departs from bridge pad 11, pier cap beam 12 or cap 13 and falls beam accident when amount of movement is excessive.
Left when falling beam beam-ends 10 in the dropping process of bridge pad 11, pier cap beam 12 or cap 13, girder falling pull bar 7 is weighed first
Force curved produce to be plastically deformed, bear pulling force after deformation therewith.The self-destruction energy absorber 4 connected in girder falling pull bar 7 is mutual
It is extruded, the minimum self-destruction energy absorber 4 of load consumes part energy and is extruded shearing self-destruction first, and is reserved to continue whereabouts
One section of space.The secondary impulsive force produced during self-destruction 4 self-destruction of energy absorber is undertaken by rubber buffer 8, in next self-destruction energy-absorbing
Moment rubber buffer 8 during 4 conquassation of device recovers elasticity, and waits the impact of a new ripple, self-destruction energy absorber 4 with stress size according to
Secondary conquassation self-destruction is until fall to stopping.During self-destruction the broken residue of self-destruction energy absorber 4 it is mutually nested on girder falling pull bar 7 after
It is continuous to bear pressure, half type self-destroyed assembly energy-absorbing is formed, the chip of generation, which is fallen into decoration protective cover 5, avoids falling from high altitude.
In Fig. 4, outermost end is equipped with a broken residual cone 9 in the surge combination of self-destruction energy absorber 4, when self-destruction energy absorber 4
It is embedded in by paxilla during pressure shear fracture after big cylinder intracavity, just by 9 spallings of broken residual cone, under further impact force action,
Big cylinder is remained ring spalling by broken paxilla residue, is fallen into decoration protective cover 5 and is formed all-destroyed secondary energy-absorbing, reserves
Space carries out next stage impact and delayed.
In Figure 5, self-destruction energy absorber is column with the level, can use cylindric or polygonal column, column body surface
Face is machined with a series of destruction grooves, and groove should be held greatly when being used in axially arrangement, and self-destruction energy absorber tandem compound to big end,
Small end is to small end.
Claims (4)
1. a kind of multistage self-destruction energy-absorbing buffering formula falling stop boom device, it is characterised in that：Beam body diaphragm plate in beam slab end is preset
Along the mounting hole of bridge longitudinal direction, girder falling pull bar is loaded in mounting hole, the two ends of girder falling pull bar are respectively charged into extrusion pressing type self-destruction suction
Energy device, and the end face of self-destruction energy absorber keeps gap by the interlocking double nut at girder falling pull bar two ends, falls the double spiral shells of beam-like state interlocking
Mother presses the end face of self-destruction energy absorber；Self-destruction energy absorber is column with the level, and column Surface Machining has a series of grooves,
And self-destruction energy absorber tandem compound should be held greatly when using to big end, small end to small end, the self-destruction energy absorber arranged in outermost end
Hollow intracavitary is provided with brokenly residual cone, and it is shaped as the cone with mesopore, the step column of self-destruction energy absorber to be cylindric or
Polygonal column, a series of grooves on column surface are in axially arrangement.
2. according to the multistage self-destruction energy-absorbing buffering formula falling stop boom device described in claim 1, it is characterised in that：On girder falling pull bar
Backing plate is equipped between the self-destruction energy absorber of assembling and interlocking double nut, between self-destruction energy absorber and beam body diaphragm plate.
3. according to the multistage self-destruction energy-absorbing buffering formula falling stop boom device described in claim 1, it is characterised in that：On girder falling pull bar
Rubber buffer is provided between the self-destruction energy absorber and beam body diaphragm plate of assembling.
4. according to the multistage self-destruction energy-absorbing buffering formula falling stop boom device described in claim 1, it is characterised in that：Whole self-destruction energy-absorbing
Device is included in protective cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610103404.2A CN105603867B (en) | 2016-02-25 | 2016-02-25 | Multistage self-destruction energy-absorbing buffering formula falling stop boom device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610103404.2A CN105603867B (en) | 2016-02-25 | 2016-02-25 | Multistage self-destruction energy-absorbing buffering formula falling stop boom device |
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| CN105603867A CN105603867A (en) | 2016-05-25 |
| CN105603867B true CN105603867B (en) | 2017-08-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106567325A (en) * | 2016-11-14 | 2017-04-19 | 西南交通大学 | Combined type anti-falling beam and collision device |
| CN108330872A (en) * | 2016-12-10 | 2018-07-27 | 孙德山 | Road and bridge bend overturning self-help apparatus |
| CN110448822B (en) * | 2018-05-07 | 2022-08-12 | 郑州大学 | Human body falling protection energy absorption system |
| CN109881574B (en) * | 2019-04-18 | 2024-04-09 | 上海市城市建设设计研究总院（集团）有限公司 | Pi-shaped cross section prefabricated bent cap adopting external prestressed tendons and prefabricating method thereof |
| CN113136789B (en) * | 2021-05-06 | 2022-06-24 | 中国地震局工程力学研究所 | Rotary box girder anti-falling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2869887B2 (en) * | 1995-09-29 | 1999-03-10 | 東京フアブリック工業株式会社 | Shock absorber and articulated bridge prevention device |
| JP3866175B2 (en) * | 2002-09-13 | 2007-01-10 | 東京ファブリック工業株式会社 | Articulated bridge protection device |
| JP3845062B2 (en) * | 2003-02-10 | 2006-11-15 | 神鋼鋼線工業株式会社 | Fall bridge prevention device with displacement limiting function |
| CN201809722U (en) * | 2010-09-03 | 2011-04-27 | 柳州欧维姆机械股份有限公司 | Steel strand stay rope type beam falling preventive device |
| CN204435205U (en) * | 2015-02-06 | 2015-07-01 | 衡水中交信德工程橡塑有限公司 | The anti-fall anticollision device, collision-prevention device of a kind of bridge beam body |
| CN205382398U (en) * | 2016-02-25 | 2016-07-13 | 昆明喆凯工程技术有限公司 | Multistage self -destruction energy absorption buffer formula roof beam device of preventing falling |
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