CN107503284B - A kind of design method of bridge buffering energy-consumption anti-fall girder apparatus - Google Patents
A kind of design method of bridge buffering energy-consumption anti-fall girder apparatus Download PDFInfo
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- CN107503284B CN107503284B CN201710765300.2A CN201710765300A CN107503284B CN 107503284 B CN107503284 B CN 107503284B CN 201710765300 A CN201710765300 A CN 201710765300A CN 107503284 B CN107503284 B CN 107503284B
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- girder apparatus
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
Abstract
The present invention provides a kind of bridge design methods of buffering energy-consumption anti-fall girder apparatus, according to the anti-section form for releasing the buffering energy-consumption anti-fall girder apparatus that needs use of the displacement of friction pendulum, and then determine its structure size, it sets out according to actual needs, enable buffering energy-consumption anti-fall girder apparatus to cooperate with friction pendulum to coordinate, avoid the occurrence of design of material waste or security risk, enable buffering beam falling prevention stopping block or shock absorption buckling tenon to participate in surrender when big shake occurs to consume energy, effectively improve system energy dissipation capacity, it can continue to play protection position-limiting action again in small earthquakes, bridge superstructure is protected not collide and fall the serious earthquake such as beam, the vibration absorption and isolation supports such as friction fit pendulum can play function of shock insulation, overall structure can be ensured safely again, it is particularly suitable for providing fortification against earthquakes for Chi-chi earthquake region, enhance the safety of bridge And maintenanceability, it reduces shake axle casing dimension and forms this.
Description
Technical field
The present invention relates to Bridge Earthquake Resistance Design technical field, in particular to a kind of bridge buffering energy-consumption anti-fall girder apparatus
Design method.
Background technique
Earthquake can input large energy to bridge structure when occurring, and can cause bridge excessive deformation, or even collapse, in order to protect
Shield bridge will not be destroyed seriously in earthquake, and usually setting seismic isolation device can also adjust ground while reducing seismic force
Distribution of the brisance between substructure, keeps the bearing distribution of whole system more rational, avoids earthquake to bridge structure bring
Damage guarantees safety of the bridge in earthquake.
Shock isolating pedestal mainly includes that lead-core shock absorption and insulation rubber support, high-damping rubber vibration absorption and isolation support and friction pendulum subtract shock insulation
Support, wherein friction pendulum support is a kind of more common seismic isolation device, light-weight, equivalent damping ratio is big, is had just
Normal support function with subtract the advantages of shock insulation function separates, but friction pendulum support shock isolation system on railroad bridge using there are all
More defects, therefore in order to limit displacement of longitudinal Isolated Bridges under small earthquakes effect, and do not fallen under big shake beam and
The method of collision needs to cooperate anti-fall girder apparatus, such as buffers beam falling prevention stopping block device or shock absorption buckling tenon device, makes it by ground
Shake cooperates with energy-dissipating and shock-absorbing together with friction pendulum support in the case where acting on, impact when mitigating earthquake, and play anti-fall beam action.
Existing design method generallys use the section form for first selecting anti-fall girder apparatus, that is, determines using square-section
The shock absorption buckling tenon for buffering beam falling prevention stopping block or circular cross-section, then carries out Theoretical Design, verifies it finally by finite element analysis
Using effect, it is main to consider that seismic force is less than yield force suffered by anti-fall girder apparatus when being designed using the method, therefore
When reality is acted on by earthquake motion, anti-fall girder apparatus is actually difficult to generate buffer function, and can not participate in consuming energy, it is difficult to
Practical application request is matched, causes bridge structure badly damaged, maintenance difficulty is very big.
Summary of the invention
Technical problem to be solved by the present invention lies in the design methods for existing anti-fall girder apparatus not to fully consider
Actual demand causes anti-fall girder apparatus buffer function poor, can not participate in consuming energy, and causes anti-seismic performance bad or generates waste of material
Deng deficiency, a kind of design method of bridge buffering energy-consumption anti-fall girder apparatus is provided, in order to achieve the above-mentioned object of the invention, this hair
It is bright to provide following technical scheme:
A kind of bridge design method of buffering energy-consumption anti-fall girder apparatus, includes the following steps:
(1) extreme displacement and yield shear force of buffering energy-consumption anti-fall girder apparatus are determined according to the displacement of friction pendulum；
(2) section form of the buffering energy-consumption anti-fall girder apparatus is determined according to the extreme displacement and yield shear force；
(3) mechanics property analysis is carried out according to section form and calculates its corresponding mechanics parameter；
(4) corresponding structure size, complete design are calculated according to the mechanics parameter acquired.
Compared to existing design method, this method is prevented according to the anti-buffering energy-consumption for needing to use of releasing of displacement of friction pendulum
The section form of fall girder apparatus, and then determine its structure size, it sets out according to actual needs, enables buffering energy-consumption anti-fall girder apparatus
Enough and friction pendulum, which cooperates, to be coordinated, and design of material waste or security risk are avoided the occurrence of, and makes to buffer beam falling prevention stopping block or damping
Trip can participate in surrender energy consumption when big shake occurs, and effectively improve system energy dissipation capacity, can continue again in small earthquakes
To protection position-limiting action, bridge superstructure is protected not collide and fall the serious earthquake such as beam, friction fit pendulum etc. subtracts shock insulation
Support can play function of shock insulation and be ensured safely to overall structure, be particularly suitable for Chi-chi earthquake region
It provides fortification against earthquakes, enhances the safety and maintenanceability of bridge, reduce shake axle casing dimension and form this.
Further, the section form is square-section or circular cross-section.
When further, according to the buffering beam falling prevention stopping block of square-section, according to yield shear force PyIt is anti-to calculate buffering
Fall the ultimate shear P of beam blockp, yield displacement ΔyWith initial stiffness Kd, then according to formula:
Calculate the structure size of the buffering beam falling prevention stopping block；Wherein, n is shape steel plate limiter the piece number；H, b and t points
Height, the width and thickness of beam falling prevention stopping block Biao Shi not buffered；The elasticity modulus of E steel plate materials；fyTo buffer beam falling prevention stopping block
The yield stress of material is determined by the material of buffering beam falling prevention stopping block.
When further, according to the shock absorption buckling tenon of circular cross-section, according to the yield stress meter of the shock absorption buckling tenon material
Calculate the elastic moment M of shock absorption buckling tenonS, further according to formula:
P=Ms/L；
Calculate the radius and height of shock absorption buckling tenon, wherein σsFor the yield stress of beam body material, r is cutting for shock absorption buckling tenon
Radius surface, L are the height of shock absorption buckling tenon, and P is the yield shear force of shock absorption buckling tenon.
Further, the yield displacement that extreme displacement is 20-30 times.
Compared with prior art, beneficial effects of the present invention: compared to existing design method, this method is according to friction pendulum
Displacement it is anti-release the section form for needing the buffering energy-consumption anti-fall girder apparatus used, and then its structure size is determined, according to reality
Border demand is set out, and so that buffering energy-consumption anti-fall girder apparatus is cooperated with friction pendulum and is coordinated, and design of material waste is avoided the occurrence of
Or security risk, so that buffering beam falling prevention stopping block or shock absorption buckling tenon is participated in surrender when big shake occurs and consume energy, effectively improves body
Be energy dissipation capacity, can continue to play protection position-limiting action again in small earthquakes, protect bridge superstructure do not collide and
Fall the serious earthquake such as beam, the vibration absorption and isolation supports such as friction fit pendulum can play function of shock insulation and to overall structure safety
It ensures, is particularly suitable for providing fortification against earthquakes for Chi-chi earthquake region, enhance the safety and maintenanceability of bridge, after reducing shake
Bridge dimension forms this.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that one of present invention buffers beam falling prevention stopping block.
Fig. 2 is the structural schematic diagram of one of present invention shock absorption buckling tenon.
Specific embodiment
Below with reference to embodiment and specific embodiment, the present invention is described in further detail.But this should not be understood
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
Embodiment 1
A kind of bridge design method of buffering energy-consumption anti-fall girder apparatus, includes the following steps:
(1) extreme displacement and yield shear force of buffering energy-consumption anti-fall girder apparatus are determined according to the displacement of friction pendulum；
(2) section form of the buffering energy-consumption anti-fall girder apparatus is determined according to the extreme displacement and yield shear force；
(3) mechanics property analysis is carried out according to section form and calculates its corresponding mechanics parameter；
(4) corresponding structure size, complete design are calculated according to the mechanics parameter acquired.
The extreme displacement and yield shear force of buffering energy-consumption anti-fall girder apparatus are first determined according to the displacement of friction pendulum, then basis
Size, direction of displacement of the yield shear force found out etc. determine that section form, the section form have square-section or circular cross-section.
According to square-section buffering beam falling prevention stopping block when, such as Fig. 1, according to yield shear force PyCalculate buffering girder falling
The ultimate shear P of blockp, yield displacement ΔyWith initial stiffness Kd, then according to formula:
Calculate height, the width and thickness of the buffering beam falling prevention stopping block of square-section；Wherein, n is shape steel plate limiter
The piece number；H, b and t respectively indicates height, the width and thickness of buffering beam falling prevention stopping block；The elasticity modulus of E steel plate materials；fyIt is slow
The yield stress for rushing beam falling prevention stopping block material is determined by the material of buffering beam falling prevention stopping block；The surrender position that extreme displacement is 20 times
It moves.
According to circular cross-section shock absorption buckling tenon when, such as Fig. 2, according to the shock absorption buckling tenon material determine yield stress meter
Calculate the elastic moment M of shock absorption buckling tenonS, further according to formula:
P=Ms/L；
Calculate the radius and height of shock absorption buckling tenon, wherein σsFor the yield stress of beam body material, r is cutting for shock absorption buckling tenon
Radius surface, L are the height of shock absorption buckling tenon, and P is the yield shear force of shock absorption buckling tenon, and design can be completed.
Claims (5)
1. a kind of bridge design method of buffering energy-consumption anti-fall girder apparatus, which comprises the steps of:
(1) extreme displacement and yield shear force of buffering energy-consumption anti-fall girder apparatus are determined according to the displacement of friction pendulum；
(2) section form of the buffering energy-consumption anti-fall girder apparatus is determined according to the extreme displacement and yield shear force；
(3) mechanics property analysis is carried out according to section form and calculates its corresponding mechanics parameter；
(4) corresponding structure size, complete design are calculated according to the mechanics parameter acquired.
2. a kind of design method of bridge buffering energy-consumption anti-fall girder apparatus as described in claim 1, which is characterized in that described
Section form is square-section or circular cross-section.
3. a kind of design method of bridge buffering energy-consumption anti-fall girder apparatus as claimed in claim 2, which is characterized in that if adopting
When with the buffering beam falling prevention stopping block of square-section, according to the yield shear force PyCalculate ultimate shear Pp, yield displacement ΔyWith
Initial stiffness Kd, then according to formula:
Calculate the structure size of the buffering beam falling prevention stopping block；
Wherein, n is shape steel plate limiter the piece number；H, b and t respectively indicates height, the width and thickness of buffering beam falling prevention stopping block；E
The elasticity modulus of steel plate materials；fyFor the yield stress for buffering beam falling prevention stopping block material.
4. a kind of design method of bridge buffering energy-consumption anti-fall girder apparatus as claimed in claim 2, which is characterized in that if adopting
When with the shock absorption buckling tenon of circular cross-section, the elastic moment of flexure of shock absorption buckling tenon is calculated according to the yield stress of the shock absorption buckling tenon material
MS, further according to formula:
P=Ms/L；
Calculate the radius and height of shock absorption buckling tenon；
Wherein, σsFor the yield stress of beam body material, r is the section radius of shock absorption buckling tenon, and L is the height of shock absorption buckling tenon, and P is to subtract
Shake the yield shear force of trip.
5. a kind of design method of bridge buffering energy-consumption anti-fall girder apparatus as claimed in claim 3, which is characterized in that the limit
The yield displacement that displacement is 20-30 times.
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| CN201710765300.2A CN107503284B (en) | 2017-08-30 | 2017-08-30 | A kind of design method of bridge buffering energy-consumption anti-fall girder apparatus |
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| CN107503284B true CN107503284B (en) | 2019-02-12 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109610301B (en) * | 2019-01-29 | 2023-08-04 | 中铁二院工程集团有限责任公司 | Damping energy consumption three-way limiting metal damping device for near-fault bridge and installation method |
| CN110130207A (en) * | 2019-05-16 | 2019-08-16 | 山东省交通规划设计院 | A kind of two-way decoupling limiter and the bridge structure for installing the limiter |
| CN110175426B (en) * | 2019-05-31 | 2022-06-14 | 中铁二院工程集团有限责任公司 | Design method of railway bridge elastic-plastic metal limiting, damping and energy-consuming device |
| CN112323615A (en) * | 2020-11-24 | 2021-02-05 | 程勇 | Bridge elastic-plastic limiting damping energy dissipation device and design method |
| CN116956448B (en) * | 2023-09-20 | 2024-02-02 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Design method of U-shaped beam falling prevention device for bridge |
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