CN103526690B - Locking device for bridge structure shock absorption control - Google Patents
Locking device for bridge structure shock absorption control Download PDFInfo
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- CN103526690B CN103526690B CN201310504625.7A CN201310504625A CN103526690B CN 103526690 B CN103526690 B CN 103526690B CN 201310504625 A CN201310504625 A CN 201310504625A CN 103526690 B CN103526690 B CN 103526690B
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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, its feature is to allow to occur by temperature expansion between bridge construction main member, shrink, the slow distortion caused such as to creep, but but component can be locked under the extreme load effects such as earthquake, limit between component and relative displacement occurs.
Background technology
Earthquake is one of Major Natural Disasters, causes huge casualties and property loss to the mankind.In recent years, China's seismic activity is comparatively frequent, and on April 20th, 2013,7.0 grades of earthquakes occur Ya'an Sichuan province, and cause 196 people dead, 11470 people are injured.The 7.1 grades of earthquakes of Yushu district, Qinghai on April 14th, 2010,2698 people are wrecked, and the economic loss caused is more than 80,000,000,000; 06 month Yunnan on the 30th, 6.0 grades, Yaoan 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, more than 87000 people, cause direct economic loss to reach 8,451 hundred million.Along with social economy and civilized development, modern city is once meet with ruinous earthquake, and economic loss and the casualties of experience will be more and more serious.
Developing rapidly in recent years along with Bridges in Our Country building cause, academia and engineering circles also correspondingly give the concern of height to the anti-seismic performance of bridge construction, and have expanded a large amount of scientific researches.Wherein, the anti-seismic performance improving bridge engineering by introducing structure control technique has become a focus of bridge engineering earthquake research and application, adds at the suitable position of bridge a kind of typical apply that the earthquake isolating equipment 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. are exactly structure control technique.
Traditional bridge construction utilizes the distortion of its component self or destroys the energy of Seismic input of dissipating, and it often causes the damage and fracture of supporting member abutment, pier stud, and reinforces normally comparatively trouble and costly to it after shake.The application of structure control technique, can avoid or reduce the damage of supporting member, although still need after shake to test and change in structure the energy-dissipating device occurring to damage to it, without the need to replacing supporting member, wants convenient a lot of compared to traditional reinforcement mode.Therefore, aseismic control technology of building structure becomes a kind of preferred version improving bridge construction anti-seismic performance just gradually.
The application of structure control technique must meet the requirement of bridge normal usage function and the safe these two aspects of Structures under Earthquake.Namely when by temperature deformation, shrink, to creep etc. cause girder creep, girder can Free Transform, produces less drag as far as possible and even does not produce drag; Under geological process, structure control technique then reduces the seismic response of bridge member by measures such as the force paths of damping energy dissipation or change structure system.
Effects of Viscous Fluid Damper and lock-up are the more typical devices of two classes in structure control technique.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 realizes application in the major workss such as Lugol's iodine, 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.Little and the lubricity of relation due to silicon oil viscosity and temperature and pressure better, compressibilty is comparatively strong, so all adopt silicone oil as Transfer Medium in both hydraulic cylinders.
As the new structure protective device that development in recent years is got up; 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 change the bang path of load; the each component of whole bridge construction can be played a role jointly; thus effectively improve the overall anti-seismic performance of structure, play the effect of operator guards well.But this device bridge engineering application in still have certain limitation, as its do not consume energy under geological process effect to such an extent as to can not reduce bridge pier stressed, the problems such as restriction are not had to the torsional effect of component.
From the development course of lock-up device, improving the piston of its pair of rod hydraulic means is improving one's methods of commonly using of forefathers.At this, in order to research and develop more excellent locking device to be applied to the field of shock absorption of bridge construction, the form of lock-up piston and internal structure are improved, strengthens its longitudinal lock function and increase it to reverse power consumption function be one of effective ways improving existing lock-up device.The basis of original lock-up device is accelerated its longitudinally locking speed with strengthen it and lock intensity each component of whole bridge construction can be made better jointly to play a role, the effectively overall anti-seismic performance of raising structure.And the torsional effect of bridge member under geological process is not give prominence to especially, therefore only need sets up some while restriction length travel and reverse damping, to reduce the torsional response of component 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 for bridge construction shockproof control, this device allows slowly distortion occurs between bridge construction main member, but under geological process, this locking device it can lock bridge construction, and its lock speed and locking intensity all more traditional lock-up device promote greatly.This device can be dissipated seismic energy by the form of damping energy dissipation simultaneously in a large number, 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 the left of cylinder body, is bolted; Left piston sheet, middle piston sheet, right piston sheet are listed on pull bar and in cylinder body, 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; Full silicone oil is filled in cylinder body; 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 be fixed on pull bar by the form close-packed arrays that flabellum is staggered from left to right, when bloom trapezoidal in throttle orifice blocks throttle orifice, some breach that middle piston sheet and cylinder body are formed are by left piston sheet, right piston sheet closes into several airtight little case rooms, and longitudinal their liquid form and action effect identical, thus can by this several visual as a whole liquid storage space, little case room, 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 communicated with throttle orifice, the trapezoidal bloom being arranged in conduction hole and spring; Trapezoidal bloom is placed in 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 side liquid pressure less than normal compared with opposite side, trapezoidal bloom just moves to throttle orifice side, 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 increase further, so repeatedly, throttle orifice area of passage is more and more less, thus accelerates the lock speed of this locking device.In the cylinder of this device, liquid is divided into three little case rooms by left piston, right piston, when pull bar moves, in cylinder, silicone oil can flow through the throttle orifice be arranged on left and right piston, thus ensure members contract, normally the carrying out of the creep such as to creep, simultaneously under seismic instantaneous velocity, left and right piston sheet locks simultaneously, increases 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, utilize its viscosity absorption portion amount of torsional energy, the dynamic response of bridge construction under reduction 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 place's sectional drawing of the present invention;
Fig. 4 is unitary construction elevation II-II place's sectional drawing of the present invention;
Fig. 5 is unitary construction elevation III-III place's sectional drawing of the present invention;
Fig. 6 is the detail structure figure of self-adjusting system of the present invention.
Have in figure: 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.
Detailed description of the invention
Locking device for bridge construction shockproof control of the present invention 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, 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, the form that three replaces by flabellum is directly produced on pull bar from left to right, ensures the sealing of piston under throttle orifice encapsulation situations; Be full of silicone oil in the cylinder body of this device, silicone oil is divided into three parts by left piston, right piston, and piston is circumferentially stained with sheet rubber; When pull bar moves left and right, silicone oil by the throttle orifice on piston at In-Cylinder Flow; Be equipped with aperture self-adjusting system in left and right piston sheet inside, it is made up of two springs, conduction hole and trapezoidal bloom, and wherein spring plays fixing trapezoidal bloom; Have a tubular left cover on the left of cylinder body, be bolted, right cover is made up of two semicircle cover plates, is bolted on the right side of cylinder body.
First, left cover 5 is arranged on the left of cylinder body 6 by Fig. 1, and with bolt tightening; Then by pull bar 1 from right side as in cylinder body 6; And then, in cylinder body 6, full silicone oil 7 is filled; Finally protecgulum 8 is covered, and tighten with bolt 10.
Fig. 3, Fig. 4, Fig. 5 respectively illustrates 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 presses the staggered form close-packed arrays of flabellum from left to right, prefabricatedly be fixed on pull bar 1, sheet rubber 9 is bonded at piston 2 simultaneously, 3, the flabellum of 4 is outer, when bloom 12 trapezoidal in throttle orifice 14 blocks throttle orifice 14, some breach that middle piston sheet 3 and cylinder body 6 are formed are by left piston sheet 4, right piston sheet 2 closes into several airtight little case rooms, and longitudinal their liquid form and action effect identical, thus can by this several visual as a whole liquid storage space, little case room, two liquid storage spaces of it and the piston left and right sides form the liquid storage space of three intercommunications altogether.
Be equipped with aperture self-adjusting system 15 at the left piston sheet 4 of piston with right piston sheet 2 inside, detail structure as shown in Figure 6.Left piston sheet that trapezoidal bloom 12 is fixed on by spring 13 4, with on right piston sheet 2, ensures pull bar 1 throttle orifice 14 unimpeded under static and slow motion.
Claims (2)
1., for a locking device for bridge construction shockproof control, it 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, is fixed by bolt (10); Left piston sheet (4), middle piston sheet (3), right piston sheet (2) are listed in that pull bar (1) is upper 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; Full silicone oil (7) is filled in cylinder body (6); Protecgulum (8) is positioned at the right-hand member of cylinder body (6), 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);
Described aperture self-adjusting system, comprises throttle orifice (14), the conduction hole (11) communicated with throttle orifice (14), the trapezoidal bloom (12) being arranged in conduction hole (11) and spring (13); Trapezoidal bloom (12) is placed in throttle orifice (14) and the junction of conduction hole (11), avoids both UNICOMs; Spring (13) withstands trapezoidal bloom (12).
2. a kind of locking device for bridge construction shockproof control 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 be fixed on pull bar (1) by the form close-packed arrays that flabellum is staggered 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) are formed are by left piston sheet (4), right piston sheet (2) closes into several airtight little case rooms, and longitudinal their liquid form and action effect identical, thus can by this several visual as a whole liquid storage space, little case room, 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 ".
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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN103526690A CN103526690A (en) | 2014-01-22 |
| CN103526690B true 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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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN105586827B (en) * | 2016-01-29 | 2017-03-22 | 石家庄铁道大学 | Continuous beam bridge vibration reduction device with inertia force activating function |
| CN113585845B (en) * | 2021-07-23 | 2022-06-21 | 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2426930Y (en) * | 2000-03-17 | 2001-04-18 | 东南大学 | Engineering structure damping fluid bumper |
| KR100646138B1 (en) * | 2005-10-04 | 2006-11-14 | 주식회사 브이테크 | Shock transmission unit set and an integrated device of bridge for resisting longitudinal and transversal earthquake load simultaneously |
| CN101070716A (en) * | 2007-04-06 | 2007-11-14 | 大连理工大学 | Self-resetting super-elastic shape memory alloy damper |
| CN201412473Y (en) * | 2009-05-13 | 2010-02-24 | 东南大学 | Strong-force quick response damper |
| JP2013210004A (en) * | 2012-03-30 | 2013-10-10 | Railway Technical Research Institute | Displacement dependent variable damping damper |
| CN103032504B (en) * | 2013-01-11 | 2015-05-27 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Inverted double-out-rod stay cable oil damper based on thin-wall small hole throttling |
| CN103061425B (en) * | 2013-01-11 | 2015-09-02 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | A kind of series and parallel multistage valve viscous damping method and damper |
| CN203066283U (en) * | 2013-01-28 | 2013-07-17 | 湖南科技大学 | Pressure-limiting external regulating type viscous damper |
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Granted publication date: 20150617 Termination date: 20171023 |