CN101135135A - Concrete arch-type bridge rigidity variable intelligent damping control system - Google Patents
Concrete arch-type bridge rigidity variable intelligent damping control system Download PDFInfo
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- CN101135135A CN101135135A CNA2006100217926A CN200610021792A CN101135135A CN 101135135 A CN101135135 A CN 101135135A CN A2006100217926 A CNA2006100217926 A CN A2006100217926A CN 200610021792 A CN200610021792 A CN 200610021792A CN 101135135 A CN101135135 A CN 101135135A
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Abstract
The present invention belongs to the field of building structure and control technology, and is especially one kind of intelligent rigidity varying shock absorbing control system for concrete arch bridge. Structurally, the intelligent rigidity varying shock absorbing control system includes rigidity varying bar elements mounted in the arch springer of the main arch structure and one geophone installed in the ground near the arch springer, and signal transmission lines and one controller connected between the rigidity varying bar elements and the geophone. After the geophone transmits ground shock information to the controller for analysis and treatment, and when the earthquake exceeds the limit value, the controller commands the rigidity varying bar elements to alter the rigidity timely and the constraint conditions between the main arch structure and the foundation are regulated intelligently to realize shock reducing control.
Description
The invention belongs to building structure and control technology field, relate in particular to a kind of concrete arch-type bridge rigidity variable intelligent damping control system.
Arch bridge is the most frequently used bridge type in China mountain area, and most mountain area is an earthquake-prone region.Concrete main arch structure is a compressed member, and ductility is little, is easy under the poor seismic behavior, geological process destroy and suffer heavy losses.The antidetonation approach of bridge engineering can be divided into two big classes in the prior art; The one, resist geological process and receive seismic energy by strengthening bridge construction self drag and ductility, but for arch bridge, its main arch circle of mainly crossing over structure is to bear axial compression, and ratio of axial compressive force to axial compressive ultimate capacity of section is bigger usually, ductility is extremely low, is difficult to be designed to the tensility shock-resistant structure; The 2nd, adopt the structural vibration control technology, by dynamics that changes structural system or the shock resistance that damping dissipation performance improves and improve structure.As being used at present the TMD or the ATMD technology of damping control, be that the additional mass with suitable spring rate is set at structure maximum displacement position, concrete arch-type bridge to large span usually needs additional very big mass, so that obviously influence the load capacity of bridge, this normal use to bridge is that institute is unacceptable; Or the half active vibration damping control method that damping unit is installed, be damping unit to be installed in the suitable locus of structure by special support system, little building structure is effective to span, but concerning the concrete arch-type bridge of large span, the support system of desiring to be provided with the band damping unit in the main arch structure almost is impossible, or it is say the cost height, so that unacceptable.
The main arch structure of concrete arch-type bridge is generally fixed-end arch, has very big rigidity, and seismic loading distortion down is little, and internal force is big, is easy to produce paroxysmal brittle fracture.The present invention is by change the rigidity of main arch structure in good time, in the hope of obviously reducing main arch structure internal force under the seismic loading under the structure allowable strain range of condition
The object of the present invention is to provide a kind of bridge load capacity that neither influences, the view that do not destroy a bridge again, mechanical concept is clear and definite, the concrete arch-type bridge rigidity variable intelligent damping control system that advanced technology is feasible.
Purpose of the present invention realizes by following technical step: A. is provided with the reservation notch at the arch springing place of main arch structure along cross-sectional perimeter, to weaken the bending rigidity of main arch in this cross section; B., stiffness variable element bar is installed at the notch place, and the two ends of element bar are connected with main reinforcement in being embedded in the main arch basis with the main reinforcement of main arch structure respectively; C. with under normal circumstances having rigidity and the intensity close with the main arch concrete, the promptly softening automatically special material of energising is when needed filled the notch remainder; D. near floor mounted earthquake information geophone arch springing; E. mount message analyzing and processing and damping controller (abbreviation controller); F. extraordinary packing material, stiffness variable element bar, geophone are used the signal transmssion line access controller respectively, form concrete arch-type bridge rigidity variable intelligent damping control system.
Native system is primarily aimed at the damping control of concrete arch-type bridge main arch structure, and its operating principle is: geophone is transferred to controller with earthquake motion information, indicates extraordinary packing material energising softening automatically to the earthquake that surpasses limit value by controller; Controller carries out analyzing and processing to the input earthquake information, and the rigidity of the stiffness variable of intelligence adjusting in good time element bar, constraints with in good time change main arch structure and foundation, make it under the deformation condition that structure is allowed, obviously to reduce the main arch internal force response that seismic load causes, reach the purpose of damping control.Can be combined in the support system collaborative work that the band damping unit is set in the spandrel construction in case of necessity, common damping can reach better damping effect.
Good effect of the present invention is: by at main arch structure arch springing periphery the stiffness variable element being installed, can change the way of restraint of ground as required to the main arch structure in good time, generally the rigidity of stiffness variable element is the normal value that is not less than original structure rigidity, and the mechanical behavior of main arch structure is a fixed-end arch; When the earthquake of transfiniting takes place, the rectangle variable stiffness elements frame of being located at the arch springing periphery can be according to the axial rigidity of its each element of feedback information needs timely adjustment, to change the two-way bending rigidity of main arch structure, make it under structure allowable strain range of condition, obviously to reduce the interior force-responsive that seismic load causes at this position; When the axial rigidity of stiffness variable element was changed to minimum value, the mechanical behavior of main arch structure was two hinged arch (the analysis showed that: seismic load causes that the interior force-responsive of two hinged arch can reach 50% with the interior force-responsive reduction of condition fixed-end arch); The constraints that native system is regulated main arch structure and foundation by intelligence can rationally be mated deformation response and the interior force-responsive of concrete arch-type bridge under seismic loading, and the two is all controlled within the acceptable range.Native system is under the condition of additional mass and damping support (promptly not influencing the normal use and the bridge outward appearance of structure), for the damping of large-span concrete arch bridge control provides a feasible approach, solved the difficult problem that prior art can't be implemented damping control to the large-span concrete arch bridge.
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail:
Figure one is a control system schematic diagram of the present invention.
Figure two is arch springing position control system arrangement diagram (the A drawing of figure one).
Figure three is arch springing cross-sectional configuration figure (the I-I section of figure two).
Among the figure, part 1 is an above-ground route, part 2 is a foundation, part 3 is the main arch structure, part 4 is the main reinforcement of main arch structure, part 5 is for being embedded in the main reinforcement in the main arch basis, part 6 is an arch springing position hinge cross wise reinforcement, part 7 is extraordinary packing material, and part 8 is a stiffness variable element bar, and part 9 is the earthquake information geophone, part 10 is information analysis processing and damping controller, the signal transmssion line that part 11 links to each other with controller for extraordinary packing material connects, and the signal transmssion line that part 12 links to each other with controller for stiffness variable element bar connects, and the signal transmssion line that part 13 links to each other with controller for geophone connects.
Purpose of the present invention realizes by following technical step: A. is provided with the reservation notch at the arch springing place of main arch structure 3 along cross-sectional perimeter, to weaken the bending rigidity of main arch in this cross section; B., stiffness variable element bar 8 is installed at the notch place, and the two ends of element bar 8 are connected with main reinforcement 5 in being embedded in the main arch basis with the main reinforcement 4 of main arch structure respectively; C. with under normal circumstances having rigidity and the intensity close with the main arch concrete, the promptly softening automatically special material 7 of energising is when needed filled the notch remainder; D. near floor mounted earthquake information geophone 9 arch springing; E. mount message analyzing and processing and damping controller 10 (be called for short controller 10); F. extraordinary packing material 7, stiffness variable element bar 8, geophone 9 are used signal transmssion line 11,12,13 access controllers 10 respectively, form concrete arch-type bridge rigidity variable intelligent damping control system.
Native system is primarily aimed at the damping control of concrete arch-type bridge main arch structure, and its operating principle is: geophone 9 is transferred to controller 10 with earthquake motion information, and is softening automatically by extraordinary packing material 7 energisings of controller 10 indications to the earthquake that surpasses limit value; 10 pairs of inputs of controller earthquake information carries out analyzing and processing, and the rigidity of the stiffness variable of intelligence adjusting in good time element bar 8, with the constraints of in good time change main arch structure 3 with foundation 2, make it under the deformation condition that structure is allowed, obviously to reduce the main arch internal force response that seismic load causes, reach the purpose of damping control.
Claims (2)
1. concrete arch-type bridge rigidity variable intelligent damping control system, it is characterized in that: A. is provided with the reservation notch at the arch springing place of main arch structure (3) along cross-sectional perimeter; B., stiffness variable element bar (8) is installed at the notch place, and the two ends of element bar (8) are connected with main reinforcement (5) in being embedded in the main arch basis with the main reinforcement (4) of main arch structure respectively; C. with under normal circumstances having rigidity and the intensity close with the main arch concrete, the softening automatically special material (7) of energising is filled the notch remainder when needing; D. near floor mounted earthquake information geophone (9) arch springing; E. mount message analyzing and processing and damping controller (10); F. extraordinary packing material (7), stiffness variable element bar (8), geophone (9) are used signal transmssion line (11), (12), (13) access controller (10) respectively, form concrete arch-type bridge rigidity variable intelligent damping control system.
2. a kind of concrete arch-type bridge rigidity variable intelligent damping control system according to claim 1, it is characterized in that: geophone (9) is transferred to controller (10) with earthquake motion information, indicates extraordinary packing material (7) energising softening automatically to the earthquake that surpasses limit value by controller (10); Controller (10) carries out analyzing and processing to the input earthquake information, and intelligent in good time rigidity of regulating stiffness variable element bar (8), with the constraints of in good time change main arch structure (3) with foundation (2), make it the interior force-responsive of the main arch structure (3) that obvious reduction seismic load causes under the deformation condition that structure is allowed, reach the purpose of damping control.
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| CNA2006100217926A CN101135135A (en) | 2006-09-02 | 2006-09-02 | Concrete arch-type bridge rigidity variable intelligent damping control system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736687B (en) * | 2008-11-19 | 2011-06-22 | 中交公路规划设计院有限公司 | Pneumatic control device for improving flutter stability of steel trussed girder suspension bridge |
| CN102134831A (en) * | 2011-01-05 | 2011-07-27 | 四川腾中重工机械有限公司 | Pneumatic wing plate structure for improving flutter stability of steel truss girder suspension bridge |
| CN102140776A (en) * | 2011-01-05 | 2011-08-03 | 四川腾中重工机械有限公司 | Asymmetric pneumatic wing plate for improving flutter stability of steel truss girder suspension bridge |
| CN107815954A (en) * | 2017-12-06 | 2018-03-20 | 哈尔滨市市政工程设计院 | The overpass or steel suspension bridge of Vibration Active Control are realized based on pneumatic muscles |
| CN108166380A (en) * | 2018-03-14 | 2018-06-15 | 重庆交通大学 | For the hexagon damping device of arch bridge |
| CN109252551A (en) * | 2018-11-07 | 2019-01-22 | 中南大学 | The progressive rate damping reinforcement structure of underground structure |
| CN109914218A (en) * | 2019-03-12 | 2019-06-21 | 重庆交通大学 | A kind of Self-resetting shock-absorption arch springing device |
| CN109914217A (en) * | 2019-03-12 | 2019-06-21 | 重庆交通大学 | A kind of energy-dissipating and shock-absorbing arch springing device |
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2006
- 2006-09-02 CN CNA2006100217926A patent/CN101135135A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736687B (en) * | 2008-11-19 | 2011-06-22 | 中交公路规划设计院有限公司 | Pneumatic control device for improving flutter stability of steel trussed girder suspension bridge |
| CN102134831A (en) * | 2011-01-05 | 2011-07-27 | 四川腾中重工机械有限公司 | Pneumatic wing plate structure for improving flutter stability of steel truss girder suspension bridge |
| CN102140776A (en) * | 2011-01-05 | 2011-08-03 | 四川腾中重工机械有限公司 | Asymmetric pneumatic wing plate for improving flutter stability of steel truss girder suspension bridge |
| CN107815954A (en) * | 2017-12-06 | 2018-03-20 | 哈尔滨市市政工程设计院 | The overpass or steel suspension bridge of Vibration Active Control are realized based on pneumatic muscles |
| CN107815954B (en) * | 2017-12-06 | 2023-11-10 | 哈尔滨市市政工程设计院 | Pedestrian overpass or steel temporary bridge realizing active vibration control based on pneumatic muscles |
| CN108166380A (en) * | 2018-03-14 | 2018-06-15 | 重庆交通大学 | For the hexagon damping device of arch bridge |
| CN109252551A (en) * | 2018-11-07 | 2019-01-22 | 中南大学 | The progressive rate damping reinforcement structure of underground structure |
| CN109252551B (en) * | 2018-11-07 | 2023-11-28 | 长沙垚森工程科技有限公司 | Gradual rigidity shock absorption reinforcing structure of underground structure |
| CN109914218A (en) * | 2019-03-12 | 2019-06-21 | 重庆交通大学 | A kind of Self-resetting shock-absorption arch springing device |
| CN109914217A (en) * | 2019-03-12 | 2019-06-21 | 重庆交通大学 | A kind of energy-dissipating and shock-absorbing arch springing device |
| CN109914217B (en) * | 2019-03-12 | 2023-11-07 | 重庆交通大学 | Energy-consuming damping arch leg device |
| CN109914218B (en) * | 2019-03-12 | 2023-11-14 | 重庆交通大学 | Self-resetting damping arch leg device |
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