CN103526690A - Locking device for bridge structure shock absorption control - Google Patents
Locking device for bridge structure shock absorption control Download PDFInfo
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- CN103526690A CN103526690A CN201310504625.7A CN201310504625A CN103526690A CN 103526690 A CN103526690 A CN 103526690A CN 201310504625 A CN201310504625 A CN 201310504625A CN 103526690 A CN103526690 A CN 103526690A
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Abstract
According to a locking device for bridge structure shock absorption control, three fan-blade-shaped piston pieces are overlapped to form a piston of the device, rubber pieces are adhered to the outer layers of the three fan-blade-shaped piston pieces, the piston is fixed to a pull rod, the piston and the pull rod are arranged in an oil cylinder filled with silicone oil, the oil cylinder is thereby divided into three portions through the left piston piece and the right piston piece, and the pull rod drives the piston to conduct longitudinal displacement and torsional displacement. The viscous force produced when the silicone oil passes through orifices controls the movement of the pull rod, the left piston piece and the right piston piece are simultaneously locked, and the locking strength of the device is enhanced. Meanwhile, hole diameter automatic adjusting systems are arranged inside the left piston piece and the right piston piece respectively, and each hole diameter automatic adjusting system is composed of a drainage hole, one of the orifices, two springs and a trapezoid steel block, and the longitudinal locking speed of the device is improved through the pressure intensity difference caused by the difference of the flow velocities of liquid on two sides of the trapezoid steel block when the piston moves. Furthermore, the fan-blade-shaped piston pieces of the device stir the silicone oil to flow when torsional displacement occurs, and the force exerted by an earthquake on a bridge structure is reduced through energy produced by the earthquake in the viscosity dissipation portion of the locking device.
Description
Technical field
The present invention relates to a kind of bridge construction displacement control device, the Slow Deformation that its feature is to allow to occur by temperature expansion between bridge construction main member, shrink, creep etc. and causes, but under the extreme load effects such as earthquake, but can lock member, limit between member relative displacement occurs.
Background technology
Earthquake is one of Major Natural Disasters, to the mankind, has caused huge casualties and property loss.In recent years, China's seismic activity is comparatively frequent, and on April 20th, 2013,7.0 grades of earthquakes occur Yaan, Sichuan, causes 196 people dead, and 11470 people are injured.7.1 grades of earthquakes of Yushu district, Qinghai on April 14th, 2010,2698 people are wrecked, and the economic loss causing surpasses 80,000,000,000; 06 month Yunnan on the 30th, 6.0 grades of Yaoans earthquake in 2009 causes the 3 Ge Zhou cities such as Chuxiong, Dali, Lijing, and totally 205.9 ten thousand people are disaster-stricken, and economic loss reaches 2,100,000,000; On 05 12nd, 2008 8.0 grades of wrecked numbers of Wenchuan violent earthquake and missing toll's summation surpass 87000 people, cause direct economic loss to reach 8,451 hundred million.Along with social economy and civilized development, once modern city meets with ruinous earthquake, economic loss and the casualties of experience will be more and more serious.
Along with the developing rapidly of Bridges in Our Country building cause, academia and engineering circles have also correspondingly given the concern of height to the anti-seismic performance of bridge construction, and have launched a large amount of scientific researches in recent years.Wherein, the anti-seismic performance that improves bridge engineering by introducing structure control technology has become a focus of bridge engineering earthquake research and application, and at the suitable position of bridge, adding the earthquake isolating equipments such as lead core rubber support, high-damp rubber support and Effects of Viscous Fluid Damper, lock-up device (a kind of speed excitated type locking device) etc. is exactly a kind of typical case's application of structure control technology.
Traditional bridge construction is utilized the distortion of its member self or is destroyed the energy of the earthquake input that dissipates, and it often causes the damage and fracture of supporting member abutment, pier stud, and it is reinforced normally after shake, comparatively trouble and expense are higher.The application of structure control technology, damage that can Avoids or reduces supporting member, although still need it to test and change the energy-dissipating device that damage occurs in structure after shake, without replacing supporting member, wants convenient a lot of than traditional reinforcement mode.Therefore, aseismic control technology of building structure becomes a kind of preferred version that improves bridge construction anti-seismic performance just gradually.
The application of structure control technology must meet the requirement of bridge normal usage function and this two aspect of Structures under Earthquake safety.Namely by temperature deformation, shrink, creep etc. cause girder creep in the situation that, girder can Free Transform, produces as far as possible less drag and even does not produce drag; Under geological process, structure control technology reduces the seismic response of bridge member by the measures such as force path of damping energy dissipation or change structure system.
Effects of Viscous Fluid Damper and lock-up are that in structure control technology, two classes are more typically installed.Under static(al), creep load condition, both substantially do not change the original function of bridge construction.And Effects of Viscous Fluid Damper mainly utilizes the power consumption of silicone oil in it to be used for reducing the response of geological process, it has realized application in the major workss such as Lu Pu bridge, Seohae bridge (Korea S); Lock-up device, under dynamic load function, provides a kind of lock function, and the adjacent members that this device is connected can shared seismic forces.Due to the relation of silicon oil viscosity and temperature and pressure is little and lubricity better, compressibilty is stronger, so all adopt silicone oil as Transfer Medium in both hydraulic cylinders.
The new structure protective device getting up as development in recent years; lock-up is a kind of hydraulic damping device of speed excitated type; this device can rely on the throttle orifice on its piston to realize locking rapidly when structure is by the impact load; and then the bang path of change load; each member of whole bridge construction can be played a role jointly; thereby effectively improve the whole anti-seismic performance of structure, well the effect of performance protection structure.But this device still has certain limitation in bridge engineering application, as it under geological process not power consumption effect to such an extent as to can not reduce bridge pier stressed, the torsional effect of member is not had to the problems such as restriction.
From the development course of lock-up device, it is improving one's methods of commonly using of forefathers that the piston of its pair of rod hydraulic means is improved.At this, in order to research and develop more good locking device to be applied to the damping field of bridge construction, the form of lock-up piston and internal structure are improved, and strengthening its longitudinal lock function and increasing its torsion power consumption function is one of effective ways that improve in existing lock-up device.On the basis of original lock-up device, accelerate its locking intensity of its speed longitudinally locking and enhancing and can make better each member of whole bridge construction jointly play a role, effectively improve the whole anti-seismic performance of structure.And the torsional effect of bridge member under geological process is not to give prominence to especially, therefore only need in restriction length travel, sets up some and reverse damping, to reduce the torsional response of member under geological process.Above 2 advantages of collection, the application prospect of this locking device in bridge earthquake resistance is larger.
Summary of the invention
Technical problem: the object of this invention is to provide a kind of locking device of controlling for bridge construction damping, this device allows, between bridge construction main member, Slow Deformation occurs, but under geological process, it can lock this locking device bridge construction, and its lock speed and locking intensity all more traditional lock-up device greatly promote.This device seismic energy that can dissipate in a large number by the form of damping energy dissipation simultaneously, lift structure anti-seismic performance.
Technical scheme: the technical scheme that technical solution problem of the present invention adopts is: this locking device comprises pull bar, right piston sheet, middle piston sheet, left piston sheet, left cover, cylinder body, protecgulum, sheet rubber, bolt; Wherein, left cover is arranged on cylinder body left side, is bolted; Left piston sheet, middle piston sheet, right piston sheet are listed on pull bar and in cylinder body, and the skin of left piston sheet, middle piston sheet, right piston sheet is stained with sheet rubber; Wherein, left piston sheet and right piston sheet inside are equipped with aperture self-adjusting system; In cylinder body, fill full silicone oil; Protecgulum is positioned at the right-hand member of cylinder body, and the right-hand member of pull bar is through protecgulum and external linkage, and the left end of pull bar is positioned at left cover through the left end of cylinder body.
Left piston sheet, middle piston sheet, the cross sectional shape of right piston sheet is flaabellum shape, and by the staggered form close-packed arrays of flabellum, be fixed on pull bar from left to right, when in throttle orifice, trapezoidal bloom blocks throttle orifice, some breach that middle piston sheet and cylinder body form are by left piston sheet, right piston sheet seals into several airtight little case chambers, and longitudinally their liquid form and action effect is identical, thereby can be by this several visual as a whole liquid storage space, little case chamber, two liquid storage spaces of it and the piston left and right sides form the liquid storage space of three intercommunications altogether, i.e. " three casees double-lockings ".
Described aperture self-adjusting system, comprises throttle orifice, the conduction hole communicating with throttle orifice, is arranged in trapezoidal bloom and the spring of conduction hole; Trapezoidal bloom is placed in to the junction of throttle orifice and conduction hole, avoids both UNICOMs; Spring withstands trapezoidal bloom.
Beneficial effect: when pull bar moves, in throttle orifice, flow rate of liquid is greater than flow rate of liquid in conduction hole, cause throttle orifice one side liquid pressure less than normal compared with opposite side, trapezoidal bloom is just to throttle orifice one side shifting, therefore the area of passage of throttle orifice reduces, and makes so again throttle orifice and conduction hole intersection location place flow rate of liquid further increase, so repeatedly, throttle orifice area of passage is more and more less, thereby has accelerated the lock speed of this locking device.In the cylinder of this device, liquid is divided into three little case chambers by left piston, right piston, when pull bar moves, in cylinder, silicone oil can flow through the throttle orifice being arranged on left and right piston, thereby normally carrying out of the creep such as guarantee members contract, creep, simultaneously under seismic instantaneous velocity, left and right piston sheet locks simultaneously, has strengthened the intensity of locking.In addition, the combined type flabellum shape piston that the present invention adopts, when pull bar rotates, stirs silicone oil and causes it to flow, and utilizes its viscosity absorption portion amount of torsional energy, reduces the dynamic response of bridge construction under geological process.
Accompanying drawing explanation
Fig. 1 is unitary construction elevation of the present invention;
Fig. 2 is unitary construction top view of the present invention;
Fig. 3 is unitary construction elevation I-I of the present invention place sectional drawing;
Fig. 4 is unitary construction elevation II-II of the present invention place sectional drawing;
Fig. 5 is unitary construction elevation III-III of the present invention place sectional drawing;
Fig. 6 is the detail structure figure of self-adjusting system of the present invention.
In figure, have: pull bar 1; Right piston 2; Middle piston sheet 3; Left piston sheet 4; Left cover 5; Cylinder body 6; Silicone oil 7; Protecgulum 8; Sheet rubber 9; Bolt 10; Conduction hole 11; Trapezoidal bloom 12; Spring 13; Throttle orifice 14; Aperture self-adjusting system 15.
The specific embodiment
The locking device of controlling for bridge construction damping of the present invention comprises pull bar 1, right piston sheet 2, piston sheet 3, left piston sheet 4, left cover 5, cylinder body 6, silicone oil 7, protecgulum 8, sheet rubber 9, bolt 10, aperture self-adjusting system 15; Its mesoporous self-adjusting system 15 comprises conduction hole 11, trapezoidal bloom 12, spring 13, throttle orifice 14.Wherein, three piston sheet likeness in form flabellums, thickness is identical, and the form from left to right three being replaced by flabellum is directly produced on pull bar, guarantees the sealing of piston under throttle orifice encapsulation situations; In the cylinder body of this device, be full of silicone oil, silicone oil is divided into three parts by left piston, right piston, on piston circumference, is stained with sheet rubber; When pull bar moves left and right, silicone oil flows in cylinder by the throttle orifice on piston; In left and right piston sheet inside, be equipped with aperture self-adjusting system, it is comprised of two springs, conduction hole and trapezoidal bloom, and its medi-spring plays fixing trapezoidal bloom; There is a tubular left cover in cylinder body left side, is bolted, and right cover is comprised of two semicircle cover plates, is bolted on cylinder body right side.
First, left cover 5 is arranged on to cylinder body 6 left sides by Fig. 1, and with bolt tightening; Then by pull bar 1 from right side as in cylinder body 6; And then, at the full silicone oil 7 of the interior filling of cylinder body 6; Finally protecgulum 8 is covered, and tighten with bolt 10.
Fig. 3, Fig. 4, Fig. 5 has shown respectively left piston sheet 4, middle piston sheet 3, the flaabellum shape cross sectional shape of right piston 2, left piston sheet 4, middle piston sheet 3, right piston 2 is pressed the staggered form close-packed arrays of flabellum from left to right, prefabricated being fixed on pull bar 1, sheet rubber 9 is bonded to piston 2 simultaneously, 3, 4 flabellum is outer, when in throttle orifice 14, trapezoidal bloom 12 blocks throttle orifice 14, some breach that middle piston sheet 3 and cylinder body 6 form are by left piston sheet 4, right piston sheet 2 seals into several airtight little case chambers, and longitudinally their liquid form and action effect is identical, thereby can be by this several visual as a whole liquid storage space, little case chamber, two liquid storage spaces of it and the piston left and right sides form the liquid storage space of three intercommunications altogether.
Claims (3)
1. a locking device of controlling for bridge construction damping, is characterized in that this locking device comprises pull bar (1), right piston sheet (2), middle piston sheet (3), left piston sheet (4), left cover (5), cylinder body (6), silicone oil (7), protecgulum (8), sheet rubber (9), bolt (10); Wherein, left cover (5) is arranged on cylinder body (6) left side, fixing by bolt (10); Left piston sheet (4), middle piston sheet (3), right piston sheet (2) are listed in pull bar (1) above and in cylinder body (6), the skin of left piston sheet (4), middle piston sheet (3), right piston sheet (2) is stained with sheet rubber (9); Wherein, left piston sheet (4) and right piston sheet (2) inside are equipped with aperture self-adjusting system; In cylinder body (6), fill full silicone oil (7); Protecgulum (8) is positioned at the right-hand member of cylinder body (6), and the right-hand member of pull bar (1) is through protecgulum (8) and external linkage, and the left end of pull bar (1) is positioned at left cover (5) through the left end of cylinder body (6).
2. a kind of locking device of controlling for bridge construction damping according to claim 1, it is characterized in that: left piston sheet (4), middle piston sheet (3), the cross sectional shape of right piston sheet (2) is flaabellum shape, and by the staggered form close-packed arrays of flabellum, be fixed on pull bar (1) from left to right, when in throttle orifice (14), trapezoidal bloom (12) blocks throttle orifice (14), some breach that middle piston sheet (3) and cylinder body (6) form are by left piston sheet (4), right piston sheet (2) seals into several airtight little case chambers, and longitudinally their liquid form and action effect is identical, thereby can be by this several visual as a whole liquid storage space, little case chamber, two liquid storage spaces of it and the piston left and right sides form the liquid storage space of three intercommunications altogether, i.e. " three casees double-lockings ".
3. a kind of locking device of controlling for bridge construction damping according to claim 1 and 2, it is characterized in that: described aperture self-adjusting system, comprises throttle orifice (14), the conduction hole (11) communicating with throttle orifice (14), the trapezoidal bloom (12) that is arranged in conduction hole (11) and spring (13); Trapezoidal bloom (12) is placed in to the junction of throttle orifice (14) and conduction hole (11), avoids both UNICOMs; Spring (13) withstands trapezoidal bloom (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310504625.7A CN103526690B (en) | 2013-10-23 | 2013-10-23 | Locking device for bridge structure shock absorption control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310504625.7A CN103526690B (en) | 2013-10-23 | 2013-10-23 | Locking device for bridge structure shock absorption control |
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| CN103526690A true CN103526690A (en) | 2014-01-22 |
| CN103526690B CN103526690B (en) | 2015-06-17 |
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| CN201310504625.7A Expired - Fee Related CN103526690B (en) | 2013-10-23 | 2013-10-23 | Locking device for bridge structure shock absorption control |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952969A (en) * | 2014-04-29 | 2014-07-30 | 中国铁道科学研究院铁道建筑研究所 | Intelligent speed lock-up device |
| CN105586827A (en) * | 2016-01-29 | 2016-05-18 | 石家庄铁道大学 | Continuous beam bridge vibration reduction device with inertia force activating function |
| CN112267372A (en) * | 2020-10-10 | 2021-01-26 | 中交一公局集团有限公司 | Novel connecting device of assembled bridge substructure |
| CN113585845A (en) * | 2021-07-23 | 2021-11-02 | 北京工业大学 | Assembly type self-resetting viscous energy dissipation support based on SMA stranded wire |
| CN114319072A (en) * | 2021-12-09 | 2022-04-12 | 东南大学 | Hydraulic energy consumption device for self-resetting pier, anti-seismic system and construction method |
| CN112267372B (en) * | 2020-10-10 | 2024-04-26 | 中交一公局集团有限公司 | Novel connecting device of assembled bridge substructure |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952969A (en) * | 2014-04-29 | 2014-07-30 | 中国铁道科学研究院铁道建筑研究所 | Intelligent speed lock-up device |
| CN103952969B (en) * | 2014-04-29 | 2015-10-28 | 中国铁道科学研究院铁道建筑研究所 | Intelligent speed locking device |
| CN105586827A (en) * | 2016-01-29 | 2016-05-18 | 石家庄铁道大学 | Continuous beam bridge vibration reduction device with inertia force activating function |
| CN112267372A (en) * | 2020-10-10 | 2021-01-26 | 中交一公局集团有限公司 | Novel connecting device of assembled bridge substructure |
| CN112267372B (en) * | 2020-10-10 | 2024-04-26 | 中交一公局集团有限公司 | Novel connecting device of assembled bridge substructure |
| CN113585845A (en) * | 2021-07-23 | 2021-11-02 | 北京工业大学 | Assembly type self-resetting viscous energy dissipation support based on SMA stranded wire |
| CN114319072A (en) * | 2021-12-09 | 2022-04-12 | 东南大学 | Hydraulic energy consumption device for self-resetting pier, anti-seismic system and construction method |
| CN114319072B (en) * | 2021-12-09 | 2024-05-03 | 东南大学 | Hydraulic energy consumption device for self-resetting bridge pier, earthquake-resistant system and construction method |
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