CN101343858A - Displacement mixed control apparatus of large-span bridge - Google Patents
Displacement mixed control apparatus of large-span bridge Download PDFInfo
- Publication number
- CN101343858A CN101343858A CNA2008100488503A CN200810048850A CN101343858A CN 101343858 A CN101343858 A CN 101343858A CN A2008100488503 A CNA2008100488503 A CN A2008100488503A CN 200810048850 A CN200810048850 A CN 200810048850A CN 101343858 A CN101343858 A CN 101343858A
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- fluid damper
- bridge
- damper
- displacement
- girder
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Abstract
The invention relates to a displacement controlling device of a great-span bridge stiffening beam. A fluid damper and a magnetorheological fluid damper are simultaneously installed between a main beam and a main tower or between bridge piers of the stiffening beam of a great-span cable-stayed bridge and a suspension bridge. The fluid damper and the magnetorheological fluid damper are adopted in the invention to commonly control the longitudinal displacement of the stiffening beam, when the earthquake load acts, the fluid damper exerts the damping function, and when vehicles run or braking is performed, the magnetorheological fluid damper is mainly adopted to intelligently adjust the damping force to reduce the longitudinal displacement of the main beam. The invention has the advantages that the displacement controlling device can improve the structural stress, reduce the displacement under the function of the running of vehicles or braking, and the service life of the movable device such as the fluid damper and the expansion joint is prolonged.
Description
Technical field
The present invention relates to a kind of length travel control device of long-span bridge stiff girder.
Background technology
In recent decades, along with the Chinese society rapid development of economy, more and more higher to the functional performance requirement of bridge.Because cable stayed bridge, suspension bridge have good mechanical performance and economic indicator, have become the topmost selection bridge type of Longspan Bridge, and the gesture that has span progressively to increase.Be accompanied by the continuous increase in cable stayed bridge, suspension cable spanning footpath, for reducing the longitudinal force of girder to king-tower or bridge pier, cable stayed bridge, suspension bridge adopt vertical unconfined floating system usually, and stiff girder adopts fluid damper to suppress the length travel response.Fluid damper belongs to the velocity profile damper, and when the earthquake effect made stiff girder produce length travel greatly, fluid damper produced bigger damping force, can effectively reduce the seismic response of girder; But fluid damper belongs to the passive-type damper again, and shortcoming is to regulate the damping force parameter with magnitude of vibrations, is difficult to handle the traveling of vehicle and the length travel that braking produces.Magnetic rheological liquid damper is a kind of outstanding intelligence controlling device, its biggest advantage for fluid damper is exactly to regulate the damper parameter on one's own initiative to realize regulating the control of damper based on the structural vibrations response, suppress the needed control of girder extensional vibration thereby make damper at any time can both provide, remedy the deficiency of viscous fluid damper.
The present invention installs fluid damper and magnetic rheological liquid damper simultaneously at stiff girder and king-tower or bridge pier, can give full play to the advantage of fluid damper, can utilize the intelligent ACTIVE CONTROL of magnetic rheological liquid damper to remedy the deficiency of fluid damper again.When the earthquake load action, mainly rely on fluid damper performance damping action, when travelled by vehicle and braking action, mainly rely on magnetic rheological liquid damper intelligence to regulate damping force and reduce the girder length travel.
Summary of the invention
The objective of the invention is at above-mentioned present situation, aim to provide and a kind ofly can improve structure stress, reduce the displacement mixed control apparatus of the Longspan Bridge of the displacement under travelled by vehicle or the braking action.
The implementation of the object of the invention is, a kind of displacement mixed control apparatus of Longspan Bridge is installed fluid damper and magnetic rheological liquid damper simultaneously between the girder of large span stayed-cable bridge, stiffening girder of suspension bridge and king-tower or bridge pier.
The present invention adopts fluid damper and magnetic rheological liquid damper to control the stiff girder length travel jointly, when the earthquake load action, the main fluid damper performance damping action that relies on, when travelled by vehicle and braking action, mainly rely on magnetic rheological liquid damper intelligence to regulate damping force and reduce the girder length travel.
The present invention can improve structure stress, reduces the displacement under travelled by vehicle or the braking action, prolongs the application life of vehicular equipments such as fluid damper, shrinkage joint.
Description of drawings
Fig. 1 is the elevation that the present invention uses at large span stayed-cable bridge, stiffening girder of suspension bridge
Fig. 2 is that the present invention is at the concrete elevation of using of certain large span stayed-cable bridge stiff girder
The specific embodiment
With reference to Fig. 1, fluid damper 3 and magnetic rheological liquid damper 4 are installed between the girder 1 of large span stayed-cable bridge, stiffening girder of suspension bridge and king-tower 2 or bridge pier 2.
With reference to Fig. 2, fluid damper 3 and magnetic rheological liquid damper 4 are installed in the time of between the girder 5 of large span stayed-cable bridge stiff girder and king-tower 6 or bridge pier 6.
As build the double tower steel truss girder cable-stayed bridge of 1092 meters of total lengths, at girder and king-tower or bridge pier fluid damper and magnetic rheological liquid damper are installed simultaneously.
The present invention adopts fluid damper and magnetic rheological liquid damper to control the stiff girder length travel jointly, when the earthquake load action, the main fluid damper performance damping action that relies on, when travelled by vehicle and braking action, mainly rely on magnetic rheological liquid damper intelligence to regulate damping force and reduce the girder length travel.
Claims (1)
1, a kind of displacement of Longspan Bridge mixes control, it is characterized in that between the girder of large span stayed-cable bridge, stiffening girder of suspension bridge and king-tower or bridge pier fluid damper and magnetic rheological liquid damper being installed simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100488503A CN101343858A (en) | 2008-08-18 | 2008-08-18 | Displacement mixed control apparatus of large-span bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100488503A CN101343858A (en) | 2008-08-18 | 2008-08-18 | Displacement mixed control apparatus of large-span bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101343858A true CN101343858A (en) | 2009-01-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100488503A Pending CN101343858A (en) | 2008-08-18 | 2008-08-18 | Displacement mixed control apparatus of large-span bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101343858A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422422A (en) * | 2013-08-30 | 2013-12-04 | 东南大学 | Multi-pylon cable-stayed bridge supporting system with function of inhibiting longitudinal seismic response and working method |
| CN103422428A (en) * | 2013-08-28 | 2013-12-04 | 东南大学 | Horizontal wind vibration reaction control system of cable-stayed bridge with rigid hinges arranged in girder |
| CN103437276A (en) * | 2013-08-30 | 2013-12-11 | 东南大学 | Multi-tower cable-stayed bridge capable of reducing buffeting reaction caused by main girder and bridge tower wind |
| CN103696358A (en) * | 2013-12-17 | 2014-04-02 | 北京工业大学 | Multi-span bridge damping device activated by earthquake acceleration |
| CN105350448A (en) * | 2015-11-26 | 2016-02-24 | 四川省交通运输厅公路规划勘察设计研究院 | Structure for preventing main beam of cable-stayed bridge structure system from generating negative reaction |
| CN105507135A (en) * | 2016-01-29 | 2016-04-20 | 石家庄铁道大学 | Seismic isolation control method having anti-girder-falling and anti-collision functions and seismic isolation control structure |
-
2008
- 2008-08-18 CN CNA2008100488503A patent/CN101343858A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422428A (en) * | 2013-08-28 | 2013-12-04 | 东南大学 | Horizontal wind vibration reaction control system of cable-stayed bridge with rigid hinges arranged in girder |
| CN103422422A (en) * | 2013-08-30 | 2013-12-04 | 东南大学 | Multi-pylon cable-stayed bridge supporting system with function of inhibiting longitudinal seismic response and working method |
| CN103437276A (en) * | 2013-08-30 | 2013-12-11 | 东南大学 | Multi-tower cable-stayed bridge capable of reducing buffeting reaction caused by main girder and bridge tower wind |
| CN103696358A (en) * | 2013-12-17 | 2014-04-02 | 北京工业大学 | Multi-span bridge damping device activated by earthquake acceleration |
| CN103696358B (en) * | 2013-12-17 | 2015-08-05 | 北京工业大学 | The multiple span bridge beam bridge damping device that a kind of earthquake acceleration activates |
| CN105350448A (en) * | 2015-11-26 | 2016-02-24 | 四川省交通运输厅公路规划勘察设计研究院 | Structure for preventing main beam of cable-stayed bridge structure system from generating negative reaction |
| CN105507135A (en) * | 2016-01-29 | 2016-04-20 | 石家庄铁道大学 | Seismic isolation control method having anti-girder-falling and anti-collision functions and seismic isolation control structure |
| CN105507135B (en) * | 2016-01-29 | 2017-11-21 | 石家庄铁道大学 | Subtract shock insulation control method and structure with girder falling and anti-collision |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090114 |