CN110468676A - Bridge structure - Google Patents
Bridge structure Download PDFInfo
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- CN110468676A CN110468676A CN201910793488.0A CN201910793488A CN110468676A CN 110468676 A CN110468676 A CN 110468676A CN 201910793488 A CN201910793488 A CN 201910793488A CN 110468676 A CN110468676 A CN 110468676A
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- bridge
- railing
- bridge structure
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Classifications
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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
- E01D1/00—Bridges in general
-
- 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
-
- 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
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
- E01D19/103—Parapets, railings ; Guard barriers or road-bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of bridge structures comprising: shaft, driver and the controller for controlling the rotation of driver drive shaft that bridge ontology, railing, driving railing are waved relative to bridge ontology.Above-mentioned bridge structure, in the case where not influencing structure section integral arrangement, railing, which can be waved, can have a variety of different postures and a variety of different rocking actions, posture and rocking action can be adjusted in real time according to incoming flow wind characteristic, the surface changes in aerodynamic forces of structure, structural vibration situation, can efficiently improve the wind resistance of bridge structure.The adjustment of the different posture of railing and rocking action can be waved, it can be achieved that structural air performance active control, a variety of wind-induced vibration problems such as vortex-induced vibration, buffeting, flutter can be coped with.Above-mentioned bridge structure, Bridge Sections integrally change very little to bridge structure without adding other attached aerodynamic Measures.In addition, above-mentioned bridge structure is widely portable in all kinds of Bridge Sections, there is very strong adaptability.
Description
Technical field
The invention belongs to bridge technology fields, are related to a kind of bridge structure.
Background technique
Wind-induced vibration is the key that large span Flexible bridge dynamical problem, mainly includes the vibration such as vortex-induced vibration, flutter, buffeting
Dynamic form.Vortex-induced vibration and buffeting theoretically are likely to occur in different wind speed, and long-term vibration will cause structure and take
Even fatigue rupture is cracked in the labour phase, while directly affecting travel safety and comfort；Flutter is bridge structure in height
A kind of high vibration form generated under wind speed, once it will cause the catastrophic failure of bridge structure；Therefore, bridge is controlled
The vortex-induced vibration and buffeting amplitude of structure improve critical wind speed of flutter, are Longspan Bridge windproof main targets.
Currently, control bridge wind-induced vibration amplitude, to improve the measure of flutter stability mainly include that aerodynamic Measures, structure are arranged
It applies and mechanical measure.Wherein, aerodynamic Measures mainly pass through the shape improvement structures under wind performance for changing Bridge Sections；Structural measure
By changing the integral arrangement of structure, coordinating quality Stiffness Distribution, optimize structural dynamic characteristic；It is attached that mechanical measure then passes through setting
Add damper to consume vibrational energy, controls Oscillation Amplitude.Wherein, structural measure has for improving structures under wind performance contribution
Limit；Mechanical measure high stability, but often cost is also relatively high, and aerodynamic Measures are due to influencing very main structure body scheme
Small, cost is very low, is most widely used.The aerodynamic Measures generallyd use have setting tuyere, deflector, suppression plate, flow distribution plate, in
Steadying plate, central slot etc. are entreated, the main purpose of these measures is the aerodynamic configuration by optimizing Bridge Sections, is changed tapered
Suffered pneumatic load, so as to improve the wind resistance of bridge structure.
Traditional aerodynamic Measures, adaptability and versatility are poor, have for the increase rate of the wind resistance of bridge structure
Limit, and most measure such as cannot achieve while improving the vortex-induced vibration of bridge structure, buffeting, flutter at a variety of wind shake performances, such as
Central slot control measure can increase substantially the flutter stability of bridge, but will cause vortex-induced vibration by a relatively large margin, unfavorable
In the long service of structure.At the same time, most aerodynamic Measures are needed in cross-sectional face addition accessory structure to realize pneumatic control
System, such as central stabilizer, suppression plate can have some impact on driving visual field etc..
Summary of the invention
For the deficiency of traditional, pneumatic measure, it is necessary to provide a kind of bridge structure of new aerodynamic Measures.
A kind of bridge structure, comprising:
Bridge ontology；
Railing is located at bridge ontology both sides of the edge；
Shaft is set to the bottom of the railing, and for driving the relatively described bridge ontology of the railing to wave；
Driver, for driving the shaft to rotate；
And controller, the shaft rotation is driven for controlling the driver；The controller and the driver
Electrical connection.
Above-mentioned bridge structure, in the case where not influencing structure section integral arrangement, can wave railing can have it is a variety of not
It, can be according to incoming flow wind characteristic, the surface changes in aerodynamic forces of structure, structural vibration with posture and a variety of different rocking actions
Situation adjusts posture and rocking action in real time, can efficiently improve the wind resistance of bridge structure.It is different railing can be waved
The adjustment of posture and rocking action, it can be achieved that structural air performance active control, vortex-induced vibration, buffeting, flutter can be coped with
Etc. a variety of wind-induced vibration problems.Above-mentioned bridge structure, Bridge Sections are whole to bridge structure without adding other attached aerodynamic Measures
Structural reform moves very little.In addition, above-mentioned bridge structure is widely portable in all kinds of Bridge Sections, there is very strong adaptability.
Optionally, the bridge structure has upright mode, overturns mode and sway mode；
Under the upright mode, the railing is upright relative to the bridge main body；
It is described translate into mode under, the railing is attached to the upper surface of the bridge main body；
Under the sway mode, the railing makees rocking action relative to the beam bridge main body.
Optionally, the railing includes several spaced segmentation columns；And each segmentation column is correspondingly arranged described in one
Shaft.
Optionally, the bridge structure also has wrong pendulum mode；
Under the wrong pendulum mode, make different rocking actions there are two the segmentation column.
Optionally, under the wrong pendulum mode, there are two the frequency waved on the segmentation column is different；
Or, there are two the amplitude waved on segmentation column is different；
Or, there are two the phase waved on segmentation column is different.
Optionally, the shield that the segmentation column includes rail stanchion and is fixed between the two neighboring rail stanchion
Column body.
Optionally, the bridge ontology is Stochastic FEM structure.
Optionally, the bridge ontology is half opening box-beam structure.
Optionally, the railing is maintaining roadway railing.
Optionally, the driver is motor.
Detailed description of the invention
Fig. 1 is the schematic cross-section of the bridge structure of one embodiment of the invention.
Fig. 2 is the partial enlarged view in Fig. 1 at A.
Fig. 3 is the rail structure schematic diagram of one embodiment of the invention.
Fig. 4 is the partial schematic diagram under the upright mode of the bridge structure of one embodiment of the invention.
Fig. 5 is the partial schematic diagram under the overturning mode of the bridge structure of one embodiment of the invention.
Fig. 6 is the partial schematic diagram under the sway mode of the bridge structure of one embodiment of the invention.
Fig. 7 is the partial schematic diagram under the wrong pendulum mode of the bridge structure of one embodiment of the invention.
Fig. 8 is the structural schematic diagram of the Bridge Sections of the bridge structure of one embodiment of the invention.
Fig. 9 is the wind tunnel experimental results figure of the bridge structure of one embodiment of the invention.
Figure 10 is the schematic cross-section of the bridge structure of another embodiment of the present invention.
Figure 11 is the structural schematic diagram of the Bridge Sections of the bridge structure of another embodiment of the present invention.
Figure 12 is the wind tunnel experimental results figure of the bridge structure of another embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, right below in conjunction with specific embodiment
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are only used to explain the present invention,
It is not intended to limit the present invention.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more
Any and all combinations of relevant listed item.
Referring to Fig. 1-2, the bridge structure 100 of one embodiment of the invention comprising bridge ontology 10, railing 20, shaft 30,
Driver (not shown) and controller (not shown).
Wherein, bridge ontology 10 is the main structure of bridge 100.In the present embodiment, bridge ontology 10 is Stochastic FEM
Structure.Stochastic FEM structure structure well known in the art, details are not described herein for specific structure.
Wherein, railing 20 is located at 10 both sides of the edge of bridge ontology.Different on bridge ontology, In is fixed on from traditional railing
In the present invention, railing 20 can be swung with respect to bridge main body 10, i.e. the angle of the dihedral angle on railing and bridge main body surface not office
It is limited to 90 degree, can also be 0 degree of arbitrary value for arriving 180 degree.In the present invention, railing 20 is other than playing the role of protection,
The purpose for inhibiting wind-induced vibration can also be played when there is wind.
Wherein, shaft 30 is set to the bottom of railing 20, can be used for driving the relatively described bridge ontology of railing 20 in this way
10 wave.That is, shaft 30 is the axle center that railing 20 waves, railing 20 is that axis carries out rocking action with shaft 30.
Wherein, the main function of driver is that drive shaft 30 rotates, and then drives railing 20 to wave around the shaft dynamic
Make.In the present embodiment, driver is motor.In other embodiments, driver can also be other structures, no longer superfluous herein
It states.
Wherein, the main function of controller is rotated for controlling driver drive shaft.Controller is electrically connected with driver
It connects.That is, instruction of the driver according to controller, control shaft makees different movements, so control railing do it is different
Rocking action or posture.
Referring to Fig. 3, it is preferable that railing includes several spaced segmentation columns；And each segmentation column is correspondingly arranged one
Shaft.That is, railing is made of several independent segmentation columns, each segmentation column is driven by its corresponding shaft.In this way
Segmentation column may be implemented and do different postures or different rocking actions.
Optionally, it is segmented the guardrail body that column includes rail stanchion 21 and is fixed between two neighboring rail stanchion 21
22.Upper surface certain distance of the guardrail body 22 apart from bridge main body, rail stanchion 21 are fixed in shaft.Shaft drives column in this way
While pole support 21 rotates, guardrail body 22 follows rail stanchion 21 to move together, to realize that railing does rocking action.
In the present embodiment, bridge structure has upright mode, overturns mode, sway mode and wrong pendulum mode.
Under upright mode, railing 20 is upright (as shown in Figure 4) relative to bridge main body 10.That is, railing 20 hangs down
It stands upright on 10 surface of bridge main body.
Under overturning mode, railing 20 is attached to the upper surface (as shown in Figure 5) of bridge main body 10.Namely railing 20 and bridge
The upper surface of main body 10 is in 0 degree of angle or 180 degree angle.When wind speed is larger or bridge vibrates, all railings are corresponding
Shaft can be driven simultaneously by motor, overturn railing slowly on the upper surface of bridge main body；At this point, bridge, which is in, translates into mode
Under, can be effectively improved the streamline degree of Bridge Sections in this way, reduce wind load suffered by bridge, for reduce bridge vibration amplitude,
Improving critical wind speed of flutter has remarkable result.
Under sway mode, railing 20 makees rocking action (as shown in fig. 6, the column on the left of in Fig. 6 relative to beam bridge main body 10
Bar 20 and the railing 20 on right side indicate state of the railing 20 under different moments).With upright mode above-mentioned and overturning mode
Difference, railing are constantly in movement, and railing is ceaselessly making rocking action.When wind speed is larger or bridge vibrates, institute
There is the corresponding shaft of railing by motor while can drive, according to arrives stream wind speed or bridge vibration feature, each section railing control electricity
The identical vibration frequency of machine input, amplitude and phase, reachable ± 90 ° of maximum vibration amplitude, to realize Bridge Sections vibration
Oscillation Amplitude is effectively reduced in active control, promotes critical wind speed of flutter.
Under wrong pendulum mode, there are two segmentation columns to make different rocking actions (as shown in Figure 7), in Fig. 7, railing 20a,
Railing 20b, railing 20c indicate different segmentation columns, and Fig. 7 is shown, under synchronization, railing 20a, railing 20b, railing
The state of 20c.With sway mode the difference is that under sway mode, all railings are moved synchronously；And in wrong pendulum mode
Under, there are asynchronous movements in all segmentation columns.Optionally, under wrong pendulum mode, there are two the frequencies waved on the segmentation column
It is different；Or, there are two the amplitude waved on segmentation column is different；Or, there are two the phase waved on segmentation column is different.When wind speed compared with
When big or bridge vibrates, according to arrives stream wind speed or bridge vibration feature, being respectively segmented the corresponding shaft in column can be independent by motor
Control, inputs different vibration frequencies, amplitude and phase respectively, to interfere the coherence of wind field, makes each area of Bridge Sections
The aerodynamic force of block is asynchronous, to achieve the purpose that reduce vibrational structure amplitude, promote critical wind speed of flutter.
It is understood that railing of the invention is not limited to above-mentioned form, whole railing, that is, one can also be
A railing is from this one end of bridge to the other end.It is understood that bridge can only have upright mould in the case where whole railing
Formula overturns mode and sway mode.
In the present embodiment, the railing is maintaining roadway railing.Maintaining roadway railing is located at outermost, can with quick response,
Damage of the wind-induced vibration to bridge is effectively reduced.It is, of course, understood that the present invention is not limited thereto.
Above-mentioned bridge structure, in the case where not influencing structure section integral arrangement, can wave railing can have it is a variety of not
It, can be according to incoming flow wind characteristic, the surface changes in aerodynamic forces of structure, structural vibration with posture and a variety of different rocking actions
Situation adjusts posture and rocking action in real time, can efficiently improve the wind resistance of bridge structure.It is different railing can be waved
The adjustment of posture and rocking action, it can be achieved that structural air performance active control, vortex-induced vibration, buffeting, flutter can be coped with
Etc. a variety of wind-induced vibration problems.Above-mentioned bridge structure, Bridge Sections are whole to bridge structure without adding other attached aerodynamic Measures
Structural reform moves very little.In addition, above-mentioned bridge structure is widely portable in all kinds of Bridge Sections, there is very strong adaptability.
Referring to Fig. 8, in one embodiment, bridge be a seat-box beam suspension bridge, the overall width 49.8m of Stochastic FEM,
Thickness 4.09m, rail height 1.21m.The wind- tunnel investigation of Flutter Performance, test result are carried out to it using Segment Model
See Fig. 9.
It can be seen in figure 9 that the result shows that the critical wind speed of flutter that will cause under the righteous style and practice angle of attack of maintaining roadway railing is rapid
It reduces, and after removing the railing, critical wind speed of flutter is significantly raised, this is equally one with the present embodiment railing entirety roll-over condition
(Fig. 5) caused.This test also illustrates that maintaining roadway railing has great influence, this hair for bridge structure vortex-induced vibration, flutter
The bright active accommodation for realizing railing posture, can be effectively improved Bridge Sections aeroperformance.
It is the schematic cross-section of the bridge structure of another embodiment of the present invention referring to Figure 10, Figure 10.With upper embodiment institute
Unlike, in the present embodiment, bridge ontology is half opening box-beam structure.It is public that half opening box-beam structure is similarly this field institute
The structure known, details are not described herein for specific structure.
Similarly, in the present embodiment, bridge structure also has upright mode, overturning mode, sway mode and wrong pendulum
Mode.
Under upright mode, railing is upright relative to bridge main body.That is, railing, which hangs down, stands upright on bridge main body surface
On.
Under overturning mode, railing is attached to the upper surface of bridge main body.Namely the upper surface of railing and bridge main body is in 0 degree
Angle or 180 degree angle.When wind speed is larger or bridge vibrates, the corresponding shaft of all railings can be driven simultaneously by motor
It is dynamic, overturn railing slowly on the upper surface of bridge main body；It translates under mode at this point, bridge is in, can be effectively improved in this way
The streamline degree of Bridge Sections reduces wind load suffered by bridge, has for reducing bridge vibration amplitude, improving critical wind speed of flutter
Remarkable result.
Under sway mode, railing makees rocking action relative to beam bridge main body.With upright mode above-mentioned and overturning mould
Formula is different, and railing is constantly in movement, and railing is ceaselessly making rocking action.When wind speed is larger or bridge vibrates,
The corresponding shaft of all railings can be driven simultaneously by motor, according to arrives stream wind speed or bridge vibration feature, the control of each section railing
The identical vibration frequency of motor input, amplitude and phase, reachable ± 90 ° of maximum vibration amplitude, to realize that Bridge Sections are vibrated
Active control, be effectively reduced Oscillation Amplitude, promote critical wind speed of flutter.
Under wrong pendulum mode, there are two segmentation columns to make different rocking actions.With sway mode the difference is that waving
Under mode, all railings are moved synchronously；And under wrong pendulum mode, there are asynchronous movements in all segmentation columns.Optionally, in mistake
Under pendulum mode, there are two the frequency waved on the segmentation column is different；Or, there are two the amplitude waved on segmentation column is different；Or,
There are two the phase waved on segmentation column is different.When wind speed is larger or bridge vibrates, shaken according to arrives stream wind speed or bridge
Dynamic feature, each corresponding shaft in column that is segmented can individually be controlled by motor, input different vibration frequencies, amplitude and phase respectively,
To interfere the coherence of wind field, keep the aerodynamic force of each block of Bridge Sections asynchronous, so that reaching reduces vibrational structure width
Degree, the purpose for promoting critical wind speed of flutter.
Referring to Figure 11, in one embodiment, one half opening twin-box bridge sections girder stayed-cable bridge of bridge, half opening box beam is wide
Spend 38.5m, thickness 3.8m, rail height 1.21m.
The section vortex-induced vibration performance wind tunnel experimental research is carried out to it using Segment Model, test result is shown in Figure 12.
In figure 12 it can be seen that maintaining roadway railing in experimentation, is incited somebody to action the main reason for causing it that large amplitude vortex-induced vibration occurs
After the maintaining roadway railing of incoming flow side is removed, discovery vortex-induced vibration disappears, and, with the invention, it is similar that railing, which is integrally overturned, for this
's.The two tests also illustrate that maintaining roadway railing has great influence for bridge structure vortex-induced vibration, flutter, and the present invention is real
The active accommodation of railing posture is showed, Bridge Sections aeroperformance can be effectively improved.
It is, of course, understood that bridge main body structure of the present invention be not limited to it is above two.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of bridge structure characterized by comprising
Bridge ontology；
Railing is located at bridge ontology both sides of the edge；
Shaft is set to the bottom of the railing, and for driving the relatively described bridge ontology of the railing to wave；
Driver, for driving the shaft to rotate；
And controller, the shaft rotation is driven for controlling the driver；The controller is electrically connected with the driver
It connects.
2. bridge structure according to claim 1, which is characterized in that the bridge structure has upright mode, overturns mould
Formula and sway mode；
Under the upright mode, the railing is upright relative to the bridge main body；
It is described translate into mode under, the railing is attached to the upper surface of the bridge main body；
Under the sway mode, the railing makees rocking action relative to the beam bridge main body.
3. bridge structure according to claim 1, which is characterized in that the railing includes several spaced segmentations
Column；And each segmentation column is correspondingly arranged the shaft.
4. bridge structure according to claim 3, which is characterized in that the bridge structure also has wrong pendulum mode；
Under the wrong pendulum mode, make different rocking actions there are two the segmentation column.
5. bridge structure according to claim 4, which is characterized in that under the wrong pendulum mode, there are two the segmentations
The frequency waved on column is different；
Or, there are two the amplitude waved on segmentation column is different；
Or, there are two the phase waved on segmentation column is different.
6. bridge structure according to claim 3, which is characterized in that the segmentation column includes rail stanchion and fixes
Guardrail body between the two neighboring rail stanchion.
7. bridge structure according to claim 1, which is characterized in that the bridge ontology is Stochastic FEM structure.
8. bridge structure according to claim 1, which is characterized in that the bridge ontology is half opening box-beam structure.
9. bridge structure according to claim 1, which is characterized in that the railing is maintaining roadway railing.
10. bridge structure according to claim 1, which is characterized in that the driver is motor.
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| CN201910793488.0A CN110468676B (en) | 2019-08-26 | 2019-08-26 | Bridge structure |
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| CN201910793488.0A CN110468676B (en) | 2019-08-26 | 2019-08-26 | Bridge structure |
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| CN110468676B CN110468676B (en) | 2021-08-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111831012A (en) * | 2020-07-03 | 2020-10-27 | 长沙理工大学 | Intelligent adjustable air barrier system on bridge and control method thereof |
| CN112012094A (en) * | 2020-09-22 | 2020-12-01 | 同济大学 | Angle-adjustable flow restraining plate device suitable for bridge deck |
| CN112458881A (en) * | 2020-11-30 | 2021-03-09 | 大连理工大学 | Semi-active device for controlling bridge flutter |
| CN113174835A (en) * | 2021-04-19 | 2021-07-27 | 同济大学 | Bridge flow restraining plate with adjustable pitch angle and ventilation rate and bridge |
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| CN113174835A (en) * | 2021-04-19 | 2021-07-27 | 同济大学 | Bridge flow restraining plate with adjustable pitch angle and ventilation rate and bridge |
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| CN110468676B (en) | 2021-08-27 |
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