CN109520689A - A kind of test method for simulating underwater multiple spot Seismic input - Google Patents
A kind of test method for simulating underwater multiple spot Seismic input Download PDFInfo
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- CN109520689A CN109520689A CN201811254127.0A CN201811254127A CN109520689A CN 109520689 A CN109520689 A CN 109520689A CN 201811254127 A CN201811254127 A CN 201811254127A CN 109520689 A CN109520689 A CN 109520689A
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
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Abstract
The present invention provides a kind of test method for simulating underwater multiple spot Seismic input, and used pilot system includes: two reservoirs, experimental tank, makes levelling platform, makes stream device, wave simulator, the shake table in experimental tank and wave absorption plate.Test method is as follows: the injection testing water in main reservoir and L shape reservoir；It is sealed checking step, open wave simulator and makes stream device, shake table is observed and whether surrounding encapsulation process seeps water, it is ensured that test safety and precise；It discharges water to water level and is lower than the height of vibration table surface, subjects are installed on vibration table surface；Again the injection testing water in main reservoir and L shape reservoir, guaranteed water level height are water levels needed for testing；It opens wave simulator and makes stream device, manufacture water flow and wave situations；The action switch for opening shake table, starts to test.The present invention can either also can be realized earthquake motion-wave-water flow coupling in multi-support seismic excitations.
Description
Technical field
The invention mainly relates to buildings and hydraulic engineering technical field, specifically, being to be related to a kind of underwater multiple spot of simulation
The test method of Seismic input.
Background technique
2018, the first national major science and technology infrastructure projects in earthquake engineering field --- large-scale multiple spot earthquake engineering simulation was ground
Study carefully facility, is taken the lead construction by University Of Tianjin.The device overall floorage is estimated, and up to 7.7 ten thousand square metres, the construction period is 5 years, is built
If after the completion, more scientific and effective platform will be provided for the earthquake research of world's Important Project.
Currently, existing seismic test method is primarily present following two problem: (1) the consistent defeated of earthquake motion may be implemented
Enter (single-point), and can be realized the test simulation of underwater single-point shake table, but can not achieve the examination of underwater multiple spot shake table
Test simulation；(2) although the Random seismic field of earthquake motion may be implemented, many factors (wave under water environment cannot be considered simultaneously
Wave and water flow coupling) the lower seismic study of effect analyzes.Also, for having used the multi-support and multi-dimension of earthquake motion to motivate test side
Method is also constrained to position and the form of shake table installation, can only simulate the Random seismic field of the discrete forms such as bridge, cannot study
Such as power station and dam consider the problems of that discrete Random seismic field carrys out the practical continuous input of simulating seismic motion.But in Practical Project
It, could more scientific reliable realization waters large-scale structure including complicated water environment factor must fully consider in situation
Seismic test simulation and analysis.This is because for the large-scale structure of waters, during seimic wave propagation to be considered
The multiple spot fluctuation effect (such as: row wave effect, attenuation effect, site effection and coherent effect) of generation, it is contemplated that external
The influence (such as: wave and water flow) of environmental factor.
In conclusion existing seismic test method cannot simulate the seismic test of large-scale structure under water environment.It is adjoint
Engineering technology level development and the promotion that is required for safety of structure of people, existing seismic test method cannot
More scientific reliable seismic test analysis is provided.Lack at present it is a set of can either apply in multi-support seismic excitations, also can be real
The seismic test method of existing earthquake motion-wave-water flow coupling.
Summary of the invention
The present invention cannot simulate the seismic test of large-scale structure under water environment to solve existing seismic test method
Problem, and providing a set of can either also can be realized earthquake motion-wave-water flow coupling earthquake in multi-support seismic excitations
Test method.
The present invention takes following technical scheme:
A kind of test method for simulating underwater multiple spot Seismic input, used pilot system include: two reservoirs, examination
Sink is tested, levelling platform is made, makes stream device, wave simulator, the shake table in experimental tank and wave absorption plate, which is characterized in that
Two reservoir one is main reservoir, and one is L shape reservoir, makes the inner side that levelling platform is placed in L shape reservoir, passes through
Levelling platform and the first vertical at L-shaped reservoir of baffle shape are made, the second vertical baffle for offering mouth is provided on making levelling platform,
It makes stream device and is placed in making on levelling platform between two vertical baffles, the opening on outlet to the second vertical baffle；
The bottom of the experimental tank is higher than main reservoir, and side is connected with main reservoir, the other side with make levelling platform
It is connected, in experimental tank bottom, by middle position, there are open areas, arrange shake table in the open area；Two water storages
The lower part in pond is connected by communicating pipe；
Wave simulator and wave absorption plate are located at the both sides of experimental tank, after the wave absorption plate includes wave absorption foreboard and wave absorption
Plate is arranged at intervals with aperture above the two, and interlaced arrangement is presented in the aperture of the two；
It is connected with rigid waterproof plate in the periphery of the open area of the experimental tank, the shake table passes through flexible anti-
Water material and rigid waterproof plate are tightly connected.
Test method is as follows:
(1) it determines the input earthquake situation of subjects, and designs the mount scheme of shake table, complete installation vibration
Platform；
(2) rigid waterproof plate, flexible waterproof material are installed, and carry out sealing and Anti-seeping technology；
(3) the injection testing water in main reservoir and L shape reservoir, it is ensured that water level slightly flooded the platform of shake table
Face；
(4) it is sealed checking step, open wave simulator and makes stream device, is observed at shake table and surrounding sealing
Whether reason seeps water, it is ensured that test safety and precise；
(5) it discharges water to water level and is lower than the height of vibration table surface, subjects are installed on vibration table surface；
(6) the injection testing water in main reservoir and L shape reservoir, guaranteed water level height are water needed for testing again
Position；
(7) it opens wave simulator and makes stream device, manufacture water flow and wave situations；
(8) action switch for opening shake table, starts to test.
Preferably, the steady flow segment that design is open from the splayed for making stream device to experimental tank on levelling platform is made described,
Water flow avoids the wave simulator and wave absorption plate on the both sides for being located at experimental tank when flowing into experimental tank, will make miscarriage device
Raw uniform fluid flow is diffused into required test area, prevents water flow from directly impacting wave simulator and wave absorption plate.The shake table
The upper surface of vibration table and the experimental tank bottom is in sustained height.
The advantages and positive effects of the present invention are:
One) this test method can be realized research of the structure under multi-point Ground Motion-wave-water flow coupling.
Two) this test method can either realize wave-water flow coupling under Single-receiver seismics excitation, also can be realized more
Wave-water flow coupling under point seismic stimulation.
Three) this test method relies on the assembly of rigid waterproof plate, can satisfy the application of the various arrangement forms of shake table.
For multiple spot seismic test, the test method is other than it can apply the Random seismic field test in discrete form, similarly
It can apply and carry out the practical continuous input test of simulating seismic motion in discrete Random seismic field.
Four) apparatus structure form applied by this test method is simple, can automatically adjust two water storages by cross over pipe
The water level in pond forms circulating water flow, while reducing experimentation cost.
Detailed description of the invention
Fig. 1 for this test method institute application apparatus top view.
Fig. 2 for this test method institute application apparatus front view.(arrow is that the flow direction of water illustrates mark)
Fig. 3 is experimental tank thin portion explanatory diagram.
Fig. 4 is the forward and backward plate scheme of installation of wave absorption.
In figure: 1a, main reservoir；1b, L shape reservoir；2, experimental tank；3, levelling platform is made；3a, stream device is made；It is 3b, steady
Flow section；4, wave simulator；5, communicating pipe；6, shake table；7, rigid waterproof plate；8, flexible waterproof material；9a, wave absorption foreboard；9b,
Wave absorption back plate；10, drain hole；A, partition；B, card slot is installed；11, the first vertical baffle；12, the second vertical baffle.
Specific embodiment
For that can further appreciate that the contents of the present invention, feature and effect, following embodiment is hereby lifted, and cooperate attached drawing.
Referring to Fig. 1 and Fig. 2, the present invention is to simulate the test method of underwater multiple spot Seismic input, comprising: two reservoirs,
Experimental tank 2 makes levelling platform 3, makes stream device 3a, wave simulator 4, shake table 6 and wave absorption plate in experimental tank.Two
Reservoir one is main reservoir 1a, and one is L shape reservoir 1b；The inner side that levelling platform 3 is placed in L shape reservoir 1b is made,
By making levelling platform 3 and the first vertical at L-shaped reservoir 1b of 11 shape of baffle, it is provided on making levelling platform 3 and offers the of mouth
Two vertical baffles 12 make stream device 3a and are placed in making on levelling platform 3 between two vertical baffles, and outlet is vertical to second
Opening on baffle 12.It from the bottom of L shape reservoir 1b draws water to form circulating water flow using the stream device 3a that makes, with research
Subjects are in the multiple spot seismic response under wave-water flow coupling.
Detailed description are as follows for structure:
Described two reservoirs separately include the main reservoir 1a and L shape reservoir 1b at top while opening, and in main storage
Design drain hole 10 in the pond bottom 1a.
The bottom of the experimental tank 2 is higher than main reservoir 1a, and side is connected with main reservoir 1a, the other side with make stream
Platform 3 is connected.In 2 bottom of experimental tank, by middle position, there are open areas, arrange shake table 6 in the open area,
The upper surface of 2 bottom of vibration table and the experimental tank of the shake table 6 is in sustained height；The lower part of two reservoirs
It is connected by communicating pipe 5.
It arranges that stream device 3a is made in installation on levelling platform 3 in described make, and designs pipeline c and pass through the bottom for making levelling platform 3
It draws water from the bottom of L shape reservoir 1b in face.It is designed on levelling platform 3 in described make from stream device 3a is made to experimental tank 2 simultaneously
The steady flow segment 3b of splayed opening, the side of the steady flow segment 3b and to make stream device 3a chimeric, the other side and partition a and installation
The inside of card slot b connects, and water flow avoids the wave simulator and wave absorption on the both sides for being located at experimental tank when flowing into experimental tank
Plate will make the uniform fluid flow that stream device 3a is generated and be diffused into required test area.
Due to it is described make stream device 3b be difficult to it is direct match with the steady flow segment 3b, so be arranged the second vertical baffle
12, guarantee the leakproofness of system really, while the designed openings on the described second vertical baffle 12, stream device 3b is made described in guarantee
Outflux of making mutually be fitted into designed openings.
Partition a is designed in that side of the experimental tank 2 setting wave simulator 4, the partition a and experimental tank 2
Side wall is connected, and directly impacts the influence test accuracy of wave simulator 4 to avoid the water flow that stream device 3a is generated is made；In the test water
The other side design of slot 2 is a pair of to install card slot b, and the installation card slot b is also connected with the side wall of experimental tank 2, is spaced a spacing
From arrangement, wave absorption foreboard 9a and wave absorption back plate 9b can be installed.
Wherein, the wave absorption foreboard 9a and wave absorption back plate 9b is by the installation card slot b peace on the experimental tank 2
Dress is fixed.When installation, wave absorption foreboard 9a is arranged close to the side of wave simulator 4, and wave absorption back plate 9b, which is mounted remotely from, makes wave dress
Set 4 side.The wave absorption back plate 9b forward direction is arranged in the rear end of the wave absorption foreboard 9a simultaneously.And the wave absorption foreboard 9a
Spaced circular opening is all done on the upside of the wave absorption back plate 9b.When installation, the circular opening of the wave absorption foreboard 9a and
Interlaced arrangement is presented in the circular opening of wave absorption back plate 9b.The design length of the wave absorption foreboard 9a and the wave absorption back plate 9b compare institute
The working width for stating wave simulator 4 is slightly longer, and when installing, and the wave absorption foreboard 9a and the wave absorption back plate 9b face described
Wave simulator 4.
The effect of wave absorption plate: when test simulation, the wave that wave simulator generates can generate reflection in the side wall of experimental tank,
And secondary interference influence subjects are generated with original wave, and there is no such effects in practical sea area, then installation is set
Meter wave absorption plate eliminates the reflection of wave and avoids interference with effect, simulates non-boundary situation in practical sea area.
Referring to Fig. 3, in the present invention, for simulation multi-point Ground Motion test, need at least two shake tables according to test side
Case is designed installation, and it is probabilistic for thus leading to the arrangement form of the vibration table surface of earthquake simulation test.So
There are biggish open areas at experimental tank 2 middle part, to install shake table 6, and in remaining open area rigid waterproofing
Plate 7 and experimental tank 2 carry out seamless spliced, the assembled region of formation enclosing vibration table.It is reserved around vibration table simultaneously
Void area does encapsulation process in void area flexible waterproof material 8.
It should be strongly noted that the flexible waterproof material 8 when void area does encapsulation process, is needed, there are more than needed
Action length avoids function influence of the shake table 6 when working directly by the flexible waterproof material 8.In 2 lower part of experimental tank
There is biggish space, is mainly used for that shake table and some oil gears of arrangement and oil pipeline etc. are installed.Institute in the present apparatus
It states and makes the water flow that stream device 3a is generated, due to producing the variation in landform, actual flow velocity in steady flow segment 3b and experimental tank 2
It needs to carry out conversion application.
The present invention is to simulate the test method of underwater multiple spot Seismic input, and this method is equipped with numerical control system.It utilizes
The system controls the actual geological process of Research on Shaking Table for Simulating, and the wave height and wavelength of the generation of real-time control wave simulator 4, with
And the flow that stream device 3a is generated, different tests condition needed for meeting different situations with this are made in control.
Referring to fig. 2, the water circulation system of present apparatus conceptual design: You Zaoliu device draws water from the bottom L shape reservoir 1b,
Water flow reaches main reservoir 1a by experimental tank 2 by steady flow segment 3b, and then according to U-tube principle, water flow passes through connection
Pipe 5 automatically returns to L shape reservoir 1b, completes circulation.
The step of detailed testing program, is as follows:
(1) firstly, drafting testing program, the input earthquake situation for subjects is theoretically determined, and design
The mount scheme of shake table completes the arrangement installation of shake table 6.
(2) rigid waterproof plate 7 and flexible waterproof material 8 are installed, and carry out sealing and Anti-seeping technology.
(3) the injection testing water in main reservoir 1a and L shape reservoir 1b, and ensure to inject water level and slightly flooded
The table top of shake table 6.
(4) it is sealed checking step: opening wave simulator 4 and make stream device 3a, observes shake table 6 and surrounding close
Whether envelope processing seeps water, it is ensured that the safety and accuracy of test.
(5) it completes after checking, is discharged water by drain hole 10 to water level and be lower than the height of 6 table top of shake table, at shake table 6
Subjects are installed on face.
(6) the injection testing water in main reservoir 1a and L shape reservoir 1b again, and ensure to inject height of water level and be
Height of water level needed for testing.
(7) according to requiring to open wave simulator 4 in digital control middle input institute wave to be tested and water flow data and make
Device 3a is flowed, water flow and wave situations are manufactured.
(8) according to requiring in digital control middle input institute seismic signature data to be tested, the effect for opening shake table 6 is opened
It closes, starts to test.
(9) test is completed, and first closes shake table 6, is then shut off wave simulator 4 and is made stream device 3a.
In the preferred scheme of one of the application, the experimental tank 2, the main reservoir 1a, the L shape reservoir 1b
The depth of water that can be simulated according to actual needs with the height of the steady flow segment 3b is designed, and the size of the communicating pipe 5
The case where can also being simulated according to actual tests, is designed.
As a preferred option, when the flexible waterproof material 8 does encapsulation process, waterproof paulin can be used and be bonded in rigidity
Between splash guard 7 and shake table 6, bonding place needs to do water-proofing treatment.
As a preferred option, after the rigid waterproof plate 7 does and splices and flexible waterproof material 8 is in void area
It when sealing, needs to do water-proofing treatment in stitching portion, preferably using waterproof gelling full-filling at gap.
As a preferred option, wave simulator 4 is in selection, using plunger type wave generator.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited to upper
The specific embodiment stated.Above-mentioned specific embodiment only has schematically, not restrictive.The technology of this field
Personnel under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, can also do
All multi-form changes out, within these are all belonged to the scope of protection of the present invention.
Claims (3)
1. a kind of test method for simulating underwater multiple spot Seismic input, used pilot system includes: two reservoirs, test
Sink makes levelling platform, makes stream device, wave simulator, the shake table in experimental tank and wave absorption plate, which is characterized in that two
A reservoir one is main reservoir, and one is L shape reservoir, the inner side that levelling platform is placed in L shape reservoir is made, by making
Levelling platform and the first vertical at L-shaped reservoir of baffle shape, the second vertical baffle for offering mouth is provided on making levelling platform, is made
Stream device is placed in making on levelling platform between two vertical baffles, the opening on outlet to the second vertical baffle；
The bottom of the experimental tank is higher than main reservoir, and side is connected with main reservoir, and the other side is connected with levelling platform is made
Logical, in experimental tank bottom, by middle position, there are open areas, arrange shake table in the open area；Two reservoirs
Lower part is connected by communicating pipe；
Wave simulator and wave absorption plate are located at the both sides of experimental tank, and the wave absorption plate includes wave absorption foreboard and wave absorption back plate,
Aperture is arranged at intervals with above the two, and interlaced arrangement is presented in the aperture of the two；
It is connected with rigid waterproof plate in the periphery of the open area of the experimental tank, the shake table passes through flexible water material
Material is tightly connected with rigid waterproof plate.
Test method is as follows:
(1) it determines the input earthquake situation of subjects, and designs the mount scheme of shake table, complete installation shake table；
(2) rigid waterproof plate, flexible waterproof material are installed, and carry out sealing and Anti-seeping technology；
(3) the injection testing water in main reservoir and L shape reservoir, it is ensured that water level slightly flooded the table top of shake table；
(4) it is sealed checking step, open wave simulator and makes stream device, shake table is observed and surrounding encapsulation process is
No infiltration, it is ensured that test safety and precise；
(5) it discharges water to water level and is lower than the height of vibration table surface, subjects are installed on vibration table surface；
(6) the injection testing water in main reservoir and L shape reservoir, guaranteed water level height are water levels needed for testing again；
(7) it opens wave simulator and makes stream device, manufacture water flow and wave situations；
(8) action switch for opening shake table, starts to test.
2. test method according to claim 1, which is characterized in that it is described make on levelling platform design from make stream device to
The steady flow segment of the splayed opening of experimental tank, water flow avoid making for the both sides for being located at experimental tank when flowing into experimental tank
Wave apparatus and wave absorption plate will make the uniform fluid flow that stream device generates and be diffused into required test area, prevent water flow from directly impacting
Wave simulator and wave absorption plate.
3. test method according to claim 1, which is characterized in that the vibration table of the shake table and the test water
The upper surface of trench bottom is in sustained height.
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| CN201811254127.0A CN109520689B (en) | 2018-10-24 | 2018-10-24 | Test method for simulating underwater multipoint seismic input |
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| CN201811254127.0A CN109520689B (en) | 2018-10-24 | 2018-10-24 | Test method for simulating underwater multipoint seismic input |
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| CN109990966A (en) * | 2019-04-28 | 2019-07-09 | 北京博科测试系统股份有限公司 | A kind of Underwater Parallel shake table |
| CN110174227A (en) * | 2019-06-26 | 2019-08-27 | 广西大学 | Submerged floating tunnel bridge response to forced vibration device and method under earthquake and coupling wave with current |
| CN117419891A (en) * | 2023-12-19 | 2024-01-19 | 天津大学 | Wave water tank test system |
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