CN108731894A - A kind of structure for eliminating underwater shake table waterproof perturbation wave - Google Patents
A kind of structure for eliminating underwater shake table waterproof perturbation wave Download PDFInfo
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- CN108731894A CN108731894A CN201810632864.3A CN201810632864A CN108731894A CN 108731894 A CN108731894 A CN 108731894A CN 201810632864 A CN201810632864 A CN 201810632864A CN 108731894 A CN108731894 A CN 108731894A
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- shake table
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- prestretching
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- 239000002689 soil Substances 0.000 claims abstract description 35
- 238000010521 absorption reaction Methods 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 claims abstract description 7
- 210000004712 air sac Anatomy 0.000 claims description 7
- 239000008207 working material Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 238000004088 simulation Methods 0.000 abstract description 11
- 238000012360 testing method Methods 0.000 abstract description 8
- 230000033001 locomotion Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 241001314948 Bursaria incana Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000703 anti-shock Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Vibration Prevention Devices (AREA)
- Foundations (AREA)
Abstract
A kind of structure for eliminating underwater shake table waterproof perturbation wave, it is related to the underwater vibration test field such as building, water conservancy, by the way of wave absorption vacation bottom, prestretching elastic water-proof cooperation shear beam soil case, the authenticity of simulation is ensure that while eliminating shake table waterproof perturbation wave.First, using the wave absorption vacation bottom that can be moved with native case, so that perturbation wave is blocked the side under vacation always, effectively solve influence of the perturbation wave to shake table surrounding body caused by shake table.Secondly, wave absorption vacation bottom is suspended in water, and prestretching elastic water-proof is arranged in outer segment, ensure that false bottom by tensioning, enables the place on shear beam soil case periphery to be servo-actuated effect and effectively simulate, shake table surrounding body environment is made to be more nearly really always.Again, the rigidity of shear beam soil case is considered using prestretching elastic water-proof so that the simulation of soil boundary condition is truer in native case, and the simulation of Structure control under earthquake has been effectively ensured.The configuration of the present invention is simple, it is easy to accomplish, it is cheap.
Description
Technical field
It is that a kind of underwater shake table of elimination is anti-the present invention relates to the underwater shaketalle test technical field of building, water conservancy etc.
Water-bound causes the structure of perturbation wave.
Background technology
Shake table is the most effective facility for carrying out earthquake engineering analog study, can to the Aseismic Design of engineering structure with it is anti-
Shock stability analysis is verified and is checked, and can effectively carry out the research work of earthquake engineering related scientific issues.Due to technology
The horizontal limitation with engineer application, existing domestic and international shake table is mostly anhydrous shake table (or shake table array).But with relating to
The generation of Hydraulic Projects Earthquake damages and deepening continuously for fluid structurecoupling Study on Problems, scholars have found antidetonation of the water to structure
Performance will produce larger impact, and the construction of underwater shake table (or shake table array) is very necessary.
Currently, shake table only can guarantee local vibration, to the real simulation of the whole field vibration of structure in hydrodynamic environment
There are still more limitations.Firstly, for large vibration table, generally use large size vibrator carries out table top driving, therefore stage body is all
Side is supported can form larger gap between platform body structure.To ensure that the safe operation of shake table, domestic and international researcher propose
A variety of shake table waterproof measures, it is most commonly seen in the mode of air sac water-proof at present.But, due to air sac water-proof structural volume compared with
Greatly, and it is centered around shake table stage body periphery, the very big interference vibration platform surrounding body of waterproof deformation meeting in shake table motion process,
Form perturbation wave.For Lentic environment, interference certainly will make the flowing pressure of structural perimeter be distorted；(such as circumstance of flowing water
Make wave, make stream), certainly will making the wave of hydrodynamic force equipment simulating, there are larger differences with target flow field with water flow field.Its
Secondary, due to the limitation of shake table load-carrying, existing underwater shake table only considers structure mostly, does not consider the soil body, therefore tests test specimen
Not comprising native box structure, does not consider that native case is conducted oneself with dignity with the soil body, the interaction of soil and structure can not be simulated.Again, actual seismic
It is not limited to certain point vibration, but whole field vibrates, the water body state of structure peripheral can be influenced by landform and the vibration of whole field,
If only consider vibration within the scope of shake table and ignore the vibration of peripheral place with and its water disturbance if analog result be necessarily distorted.
As it can be seen that above-mentioned items problem is bound to cause the distortion of earthquake-hydrodynamic force coupled simulation effect, to influence experiment process so that
Test accuracy reduces or test failure.
For this reason, it is necessary to a kind of structure for eliminating underwater shake table waterproof perturbation wave be proposed, in the premise for eliminating perturbation wave
Under more real simulation earthquake-hydrodynamic coupling relationship as far as possible.
Invention content
The application is directed to a kind of suitable for the engineering fields such as building, water conservancy, the knot of elimination shake table waterproof perturbation wave
Structure, the structure can effectively eliminate the disturbance wave interference around test specimen, and the water body in real simulation seismic process under whole field vibration
Environment and Structure control.
In order to achieve the above object, the technical solution adopted by the present invention is：
A kind of structure for eliminating underwater shake table waterproof perturbation wave, including wave absorption vacation bottom, fixed false bottom, false bottom support, even
Hinge, prestretching elastic water-proof, shear beam soil case are connect, wherein wave absorption vacation bottom is made of multi-disc sector structure, and one end passes through connecting hinge
It is fixed on shear beam soil box outer wall top, and is arranged along shear beam soil case circumferential annular；The wave absorption vacation bottom other end and prestretching elasticity
Waterproof one end connects, and the prestretching elastic water-proof other end is connected by connecting hinge and false bottom support, and false bottom support annular is fixed on mixed
On solidifying earth foundation, fixed vacation bottom is arranged in the periphery at wave absorption vacation bottom, carries out radial distribution around false bottom support, and be fixed on vacation
On the support of bottom, the position opposite with shear beam soil case is equipped with stage body chamber in the middle part of the concrete foundation, in stage body chamber
Equipped with vibration stage body, the shear beam soil case is fixed on vibration stage body；Vibrate the stage body chamber of stage body and concrete foundation
Between the upper edge of room be equipped with air sac water-proof, vibrate stage body bottom and side wall be respectively equipped with it is several be connected with stage body chamber it is vertical
Actuator and horizontal actuator.
Further, wave absorption vacation bottom radial distribution is not less than shake table object table in shear beam soil case periphery, cascade unit
1.5 times of face size between number 30~60, are attached using flexible rubber material between every wave absorption vacation bottom and ensure to prevent
Water effect；Wave absorption vacation bottom uses hollow aluminium alloy frame structure, density to be slightly lighter than water body.
Further, prestretching elastic water-proof and the quantity of false bottom support are consistent with monolithic wave absorption vacation truth of a matter amount；Prestretching elasticity
Waterproof is made of tension spring and flexible earth working material, overall stiffness and the shear beam soil case Rigidity Matching of prestretching elastic water-proof.
Further, fixed false bottom material is stone-laying or movable supporting earth working material, is not occurred with structure during experiment
Movement.
The beneficial effects of the invention are as follows：
A kind of structure that eliminating underwater shake table waterproof perturbation wave coordinates shear beam using wave absorption vacation bottom, prestretching elastic water-proof
The mode of native case ensure that the authenticity of simulation while eliminating shake table waterproof perturbation wave, have advantageous effect outstanding.
First, structure is using the wave absorption vacation bottom that can be moved with native case so that perturbation wave is blocked the side under vacation always, effectively solves to shake
Influence of the perturbation wave to shake table surrounding body caused by dynamic platform.Secondly, wave absorption vacation bottom is suitable with water body severe, can be suspended in water
In, and outer segment is provided with prestretching elastic water-proof, ensure that false bottom always by tensioning.This makes the place on shear beam soil case periphery
Servo-actuated effect is effectively simulated so that shake table surrounding body environment is more nearly really.Again, using prestretching elastic water-proof
The rigidity for considering the native case of shearing, may make the simulation of soil boundary condition in native case truer, has been effectively ensured under earthquake
The simulation of Structure control.In addition, this has the advantages of simple structure and easy realization, it is cheap.
Description of the drawings
A kind of construction profiles for eliminating underwater shake table waterproof perturbation wave of Fig. 1；
A kind of structure drawings in side sectional elevation for eliminating underwater shake table waterproof perturbation wave of Fig. 2；
Profilograph after a kind of structure motions for eliminating underwater shake table waterproof perturbation wave of Fig. 3.
1 in figure, wave absorption vacation bottom；2, fixed false bottom；3, false bottom support；4, connecting hinge；5, prestretching elastic water-proof；6, shear beam
Native case；7, stage body is vibrated；8, concrete foundation；9, air sac water-proof；10, stage body chamber；11, vertical actuator；12, horizontal start
Device.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings.
Referring to attached drawing 1,2,3, the structure that the present invention eliminates underwater shake table waterproof perturbation wave includes wave absorption vacation bottom 1, fixes
False bottom 2, false bottom support 3, connecting hinge 4, prestretching elastic water-proof 5, shear beam soil case 6, wherein 1 one end of wave absorption vacation bottom passes through connecting hinge
4 are fixed on 6 outer wall top of shear beam soil case, and arrange along 6 circumferential annular of shear beam soil case, ensure that wave absorption vacation bottom 1 can be with shearing
6 associated movement of beam soil case.1 shape of wave absorption vacation bottom is sector, and for radial distribution in 6 periphery of shear beam soil case, cascade unit is not small
Between 1.5 times of vibration 7 mesa dimensions of stage body, number 30~60, using hollow aluminium alloy frame structure, density is close with water body
Degree is suitable, is slightly lighter than water body, is attached using flexible rubber material between every wave absorption vacation bottom 1 and ensures waterproof effect.Disappear
1 other end of wave vacation bottom is connect with 5 one end of prestretching elastic water-proof, and 5 other end of prestretching elastic water-proof is supported by connecting hinge 4 and false bottom
3 connections, prestretching elastic water-proof 5 and the quantity of false bottom support 3 are consistent with monolithic wave absorption vacation 1 quantity of bottom, and false 3 annular of bottom support is fixed
On 6 lower concrete basis 8 of shear beam soil case.Prestretching elastic water-proof 5 is made of tension spring and flexible earth working material, spring
Have that prestretching is elastic, can tensioning at any time with shrink, flexible earth working material can play waterproof action；The entirety of prestretching elastic water-proof 5 is just
Degree needs and 6 Rigidity Matching of shear beam soil case, and native boundary condition is similar during guarantee test；The setting of fixed vacation bottom 2 is disappearing
The periphery at wave vacation bottom 1 supports 3 to carry out radial distribution around false bottom, is fixed on false bottom support 3, material is stone-laying or work
Dynamic support earth working material etc., does not move during experiment with structure；6 bottom of shear beam soil case is equipped with concrete foundation 8, mixes
8 middle part of the solidifying earth foundation position opposite with shear beam soil case 6 is equipped with stage body chamber 10, and vibration stage body 7 is equipped in stage body chamber 10,
Shear beam soil case 6 is fixed on vibration stage body 7；It is equipped between vibration stage body 7 and 10 upper edge of stage body chamber of concrete foundation 8
Air sac water-proof 9 ensures that equipment safety is effectively run in stage body chamber 10；The bottom and side wall of vibration stage body 7 is respectively equipped with several
The vertical actuator 11 and horizontal actuator 12 being connected with stage body chamber 10, the vertical actuator 11 in stage body chamber 10 and water
Flat actuator 12 can guarantee accurate simulation of the vibration stage body 7 to earthquake.
In the embodiment, vibration 7 mesa dimensions of stage body are 6 × 6m, load-carrying 150t, operating depth 3m, it is horizontal with it is vertical
Range 0.5m；Horizontal actuator quantity is 32, and vertical actuator quantity is 8；Native case size is 5.5 × 5.5m, height 1m；
Wave absorption vacation bottom cascade unit is 10m.
In operational process, vertical actuator 11 and horizontal actuator 12 can force vibration stage body 7 to be subjected to displacement or corner；This
When air sac water-proof 9 can occur corresponding deformation, generate perturbation wave；Shear beam soil case 6 can occur with wave absorption vacation bottom 1 with vibration stage body 7
Movement, corresponding prestretching elastic water-proof 5 can tensioning or contractions；In shake table operational process, perturbation wave obstructs and disappears always
It dissipates in 1 lower section of wave absorption vacation bottom, and shear beam soil case 6 can effectively simulate consideration Structure control with the servo-actuated of wave absorption vacation bottom 1
Whole field vibration environment.
Claims (5)
1. a kind of structure for eliminating underwater shake table waterproof perturbation wave, it is characterized in that：Including wave absorption vacation bottom (1), fixed false bottom
(2), false bottom support (3), connecting hinge (4), prestretching elastic water-proof (5), shear beam soil case (6), wherein wave absorption vacation bottom (1) is by multi-disc
Sector structure forms, and one end is fixed on shear beam soil case (6) outer wall top by connecting hinge (4), and along shear beam soil case (6)
Circumferential annular is arranged；Wave absorption vacation bottom (1) other end is connect with prestretching elastic water-proof (5) one end, prestretching elastic water-proof (5) other end
It is connect with false bottom support (3) by connecting hinge (4), false bottom support (3) annular is fixed in concrete foundation (8), fixed vacation bottom
(2) setting supports (3) to carry out radial distribution, and be fixed on false bottom support (3) in the periphery at wave absorption vacation bottom (1) around false bottom
On, in the middle part of the concrete foundation (8) stage body chamber (10), stage body chamber are equipped with the opposite position of shear beam soil case (6)
Vibration stage body (7) is equipped in room (10), the shear beam soil case (6) is fixed on vibration stage body (7)；Vibrate stage body (7)
Air sac water-proof (9), the bottom and side wall of vibration stage body (7) are equipped between stage body chamber (10) upper edge of concrete foundation (8)
It is respectively equipped with several vertical actuator (11) being connected with stage body chamber (10) and horizontal actuator (12).
2. the structure according to claim 1 for eliminating underwater shake table waterproof perturbation wave, it is characterized in that：Wave absorption vacation bottom (1)
Radial distribution is in shear beam soil case (6) periphery, and cascade unit is not less than 1.5 times of vibration stage body (7) mesa dimensions, number 30
Between~60, it is attached using flexible rubber material between every wave absorption vacation bottom (1) and ensures waterproof effect.
3. the structure according to claim 1 or 2 for eliminating underwater shake table waterproof perturbation wave, it is characterized in that：Wave absorption vacation bottom
(1) hollow aluminium alloy frame structure, density is used slightly to be lighter than water body.
4. the structure according to claim 1 for eliminating underwater shake table waterproof perturbation wave, it is characterized in that：Prestretching elastic water-proof
(5) support the quantity of (3) consistent with monolithic wave absorption vacation bottom (1) quantity with false bottom；Prestretching elastic water-proof (5) by tension spring with it is soft
Property earth working material composition, the overall stiffness of prestretching elastic water-proof (5) and 6 Rigidity Matching of shear beam soil case.
5. the structure according to claim 1 for eliminating underwater shake table waterproof perturbation wave, it is characterized in that：Fixed vacation bottom (2)
Material is stone-laying or movable supporting earth working material, is not moved during experiment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810632864.3A CN108731894B (en) | 2018-06-20 | 2018-06-20 | Eliminate structure of waterproof disturbance wave of vibrating table under water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810632864.3A CN108731894B (en) | 2018-06-20 | 2018-06-20 | Eliminate structure of waterproof disturbance wave of vibrating table under water |
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| CN108731894A true CN108731894A (en) | 2018-11-02 |
| CN108731894B CN108731894B (en) | 2024-03-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839255A (en) * | 2018-12-20 | 2019-06-04 | 天津大学 | A kind of inflatable water-tight device for underwater shake table |
| CN110595713A (en) * | 2019-09-27 | 2019-12-20 | 天津大学 | Suspension type tunnel earthquake and flow induced vibration composite test simulation device |
| CN115662257A (en) * | 2022-12-26 | 2023-01-31 | 中国科学院、水利部成都山地灾害与环境研究所 | Post-earthquake riverway evolution simulation test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN110595713A (en) * | 2019-09-27 | 2019-12-20 | 天津大学 | Suspension type tunnel earthquake and flow induced vibration composite test simulation device |
| CN115662257A (en) * | 2022-12-26 | 2023-01-31 | 中国科学院、水利部成都山地灾害与环境研究所 | Post-earthquake riverway evolution simulation test device |
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