CN109186910A - A kind of shaking-table test control method for Cross-fault leveling seismic wave - Google Patents
A kind of shaking-table test control method for Cross-fault leveling seismic wave Download PDFInfo
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- CN109186910A CN109186910A CN201811177155.7A CN201811177155A CN109186910A CN 109186910 A CN109186910 A CN 109186910A CN 201811177155 A CN201811177155 A CN 201811177155A CN 109186910 A CN109186910 A CN 109186910A
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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
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
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Abstract
The invention discloses a kind of shaking-table test control methods for Cross-fault leveling seismic wave, the power section of Cross-fault leveling seismic wave and Quintic system part are separated using the method for filtering, high frequency acceleration input system is obtained into high frequency displacement drive signal, it is superimposed low frequency pseudo-static displacement time-histories on this basis, to obtain wideband displacement drive signal, and it is inputted vibration bench control system, it realizes the control to shake table, completes the shaketalle test simulation of Cross-fault leveling seismic wave.The present invention has taken into account the requirement of two aspects of Cross-fault leveling seismic wave acceleration and pseudo-static displacement, and the earthquake simulation shaking table that can be realized Cross-fault leveling seismic wave accurately reproduces.
Description
Technical field
The present invention relates to a kind of shaking-table test control methods, especially a kind of to be directed to across earthquake fault rupture
The shaking-table test method of band structure, belongs to building structure aseismatic experimental technique field.
Background technique
Cross-fault leveling earthquake motion is different from common earthquake motion, and mainly there are two aspects: first, tomography two sides ground motion is poor
Anisotropic larger, i.e. Cross-fault leveling earthquake motion is a kind of non-uniform method, and the otherness between this non-uniform method impacting point
It is different from the traditional non-uniform method such as row wave effect, site effection, in the side such as the intensity of seismic wave, waveform and frequency spectrum
There is larger difference in face.Second, fault fractured zone two sides ground permanent displacement, this ground permanent displacement is by the earthquake fault changing of the relative positions
It is caused, show as the platform section that time shaft is parallel to after macroseism in displacement time-histories, i.e., the impacting point of Cross-fault leveling earthquake motion it
Between can generate quasi-static relative displacement.Bridge, tunnel and the isometric linear structure of pipeline will meet under Cross-fault leveling earthquake motion effect
Threat by two aspects: the forced change that structure inertia stress effect caused by macroseism and ground permanent displacement generate structure
Shape.
Conventional shaking-table test seismic input wave control method, which generallys use, directly inputs Acceleration time course
Or displacement time-histories is directly inputted, displacement drive signal is gone out by system matrix computation and inputs earthquake simulation shaking table control system
The high-precision reproduction of seismic wave can be realized in system.However, the above method can not effectively realize the shake table examination of Cross-fault leveling seismic wave
Test simulation.If using the method for directly inputting Acceleration time course, due to shake table working frequency, quasi-static ground
The simulation of permanent displacement will be unable to realize；If using the method for directly inputting displacement time-histories, the acceleration simulated can be generated
Large error is usually unable to reach required precision.In order to realize the shaketalle test simulation of Cross-fault leveling seismic wave, a kind of energy is needed
Enough combine the shaketalle test control method of two aspect requirement of acceleration and displacement.
Summary of the invention
To solve the above problems, the invention discloses a kind of shake tables that can simulate Cross-fault leveling earthquake motion compound movement feature
Array experimental control method is considering crossover fault earth's surface especially suitable for the structures such as bridge, tunnel and pipeline or structures
The shaking-table test when situation of the zone of fracture.This method can be to avoid common seismic simulating vibration table experimental control method
Defect when for the test of Cross-fault leveling structural vibration table, can combine of both Cross-fault leveling seismic wave acceleration and displacement
It is required that.
To achieve the goals above, this invention takes following technical solutions:
A kind of shaking-table test control method for Cross-fault leveling seismic wave, by filtering Cross-fault leveling seismic wave
High and low frequency separation is carried out, high frequency acceleration input system is obtained into high frequency displacement drive signal, it is quasi- to be superimposed low frequency on this basis
Static displacement time-histories realizes the earthquake simulation of Cross-fault leveling seismic wave to obtain wideband displacement drive signal and control shake table
Research on Shaking Table for Simulating.
It mainly comprises the steps that
Step 1 prepares one group of Cross-fault leveling seismic wave, carries out necessary processing according to test requirements document, generates reference wave；
Step 2 is filtered reference wave, obtains high frequency acceleration signal and low frequency displacement signal；
Step 3 carries out amplitude modulation to reference wave high frequency acceleration signal, and input system calculates displacement drive signal, obtains high frequency
Displacement drive signal；
Step 4 carries out amplitude modulation to the low frequency displacement signal of reference wave, obtains target low frequency and is displaced time-histories；
High frequency displacement drive signal and low-frequency target displacement time-histories are overlapped by step 5, generate wideband displacement drive signal；
Step 6 realizes the control to shake table by wideband displacement drive signal, completes test.
The step 1 specifically: prepare one group of Cross-fault leveling seismic wave, carry out time reduced scale, letter to it according to test requirements document
The preparations such as number resampling are displaced time-histories end zero to it when necessary, thus generate reference wave (including Acceleration time course and
It is displaced time-histories)；
The step 2 specifically: high-pass filtering is carried out to reference wave Acceleration time course, low pass filtered is carried out to reference wave displacement time-histories
Wave obtains the high frequency acceleration signal and low frequency displacement signal of reference wave, and rule of thumb, cutoff frequency can take 0.5Hz；
The step 3 specifically: amplitude modulation is carried out to reference wave high frequency acceleration signal, is adjusted to table top aimed acceleration peak value,
And the high frequency Acceleration time course input system after amplitude modulation is calculated into displacement drive signal, it is iterated operation when necessary, obtains high
Frequency displacement drive signal；
The step 4 specifically: amplitude modulation is carried out to the low frequency displacement signal of reference wave, obtains the low frequency of target floor permanent displacement
It is displaced time-histories, target floor permanent displacement can need to choose according to test；
The step 6 specifically: the wideband displacement drive signal input earthquake simulation shaking table control system for generating step 5 is real
Now to the control of shake table, the Research on Shaking Table for Simulating of Cross-fault leveling seismic wave is completed.
The beneficial effects of the present invention are:
(1) wideband displacement drive signal generated contains ground permanent displacement information, avoids when directly inputting acceleration
Control method when quail-static displacement ingredient loss, enable the seismic wave of test simulation to embody practical Cross-fault leveling seismic wave
Relative displacement between impacting point；
(2) the high frequency displacement drive signal generated by acceleration signal is contained in wideband displacement drive signal generated, because
This compares the control method for directly inputting displacement time-histories, and technical solution proposed by the invention can retain more accurate ground and add
Velocity information, seismic wave accelerated energy access more accurate reproduction.
Detailed description of the invention
Fig. 1 is basic operation flow chart of the invention.
Fig. 2 is the high frequency acceleration signal example generated using step 2 of the present invention.
Fig. 3 is the low frequency displacement signal example generated using step 4 of the present invention.
Fig. 4 is the high frequency displacement drive signal example generated using step 3 of the present invention.
Fig. 5 is the wideband displacement drive signal example generated using step 5 of the present invention.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following specific embodiments are only
For illustrating the present invention rather than limiting the scope of the invention.
(1) one group of Cross-fault leveling seismic wave, the earthquake motion time history comprising fault fractured zone two sides are chosen according to test objective.It can
To select natural wave, artificial wave also can be used, specific requirement is that can embody fault fractured zone two sides ground permanent displacement.To institute
The Cross-fault leveling seismic wave of selection carries out necessary processing work, is such as required to carry out time reduced scale, signal weight according to shaketalle test
Sampling is displaced time-histories end zero to it when necessary, to generate reference wave (including Acceleration time course and displacement time-histories).
(2) high-pass filtering is carried out to reference wave Acceleration time course, low-pass filtering is carried out to reference wave displacement time-histories, obtains base
The high frequency acceleration signal and low frequency displacement signal of quasi wave, rule of thumb, cutoff frequency can take 0.5Hz.This step purpose exists
In by the kinetic contribution of reference wave and the separation of static(al) ingredient, i.e., ground permanent displacement is separated from reference wave, such as Fig. 2 and
Shown in Fig. 3.
(3) amplitude modulation is carried out to reference wave high frequency acceleration signal, adjusted to table top aimed acceleration peak value, and will be after amplitude modulation
High frequency Acceleration time course input system calculate displacement drive signal, be iterated operation when necessary, acquisition high frequency displacement drive
Signal, as shown in Figure 4.This step purpose is to obtain the displacement drive signal using input acceleration signal as target.
(4) amplitude modulation is carried out to the low frequency displacement signal of reference wave, obtains target low frequency and is displaced time-histories.This step passes through to low
The quantified controlling to ground permanent displacement may be implemented in the amplitude modulation of frequency displacement signal.
(5) the target low frequency displacement time-histories that the high frequency displacement drive signal that step 3 generates is generated with step 4 is folded
Add, generates wideband displacement drive signal, as shown in Figure 5.The additive process of this step is completed in time domain, obtained wideband displacement
Driving signal had both contained terrestrial high-frequency vibration information caused by macroseism, also contained the permanent position in ground caused by fault movement
It moves.
(6) the wideband displacement drive signal input earthquake simulation shaking table control system generated step 5 is realized to vibration
The Research on Shaking Table for Simulating of Cross-fault leveling seismic wave is completed in the control of platform.
Finally it should be noted that the above summary of the invention and operational instances are merely to illustrate the present invention, this hair is not limited
Bright described technical solution.Technical solutions according to the invention also can be used for needing to realize the earthquake in the case of quail-static displacement
The solution of the control of simulating vibration table, involved problem is intended to be within the scope of the claims of the invention.
Claims (7)
1. a kind of shaking-table test control method for Cross-fault leveling seismic wave, it is characterised in that: including following step
It is rapid:
Step 1 prepares one group of Cross-fault leveling seismic wave, is handled according to test requirements document and generates reference wave；
Step 2 is filtered reference wave, obtains high frequency acceleration signal and low frequency displacement signal；
Step 3 carries out amplitude modulation to reference wave high frequency acceleration signal, and input system calculates displacement drive signal, obtains high frequency
Displacement drive signal；
Step 4 carries out amplitude modulation to the low frequency displacement signal of reference wave, obtains target low frequency and is displaced time-histories；
High frequency displacement drive signal and low-frequency target displacement time-histories are overlapped by step 5, generate wideband displacement drive signal；
Step 6 realizes the control to shake table by wideband displacement drive signal, completes test.
2. the shaking-table test control method according to claim 1 for Cross-fault leveling seismic wave, feature
It is: the step 1 specifically: prepare one group of Cross-fault leveling seismic wave, time reduced scale, signal weight are carried out to it according to test requirements document
The preparation of sampling is displaced time-histories end zero, to generate reference wave to it when necessary.
3. the shaking-table test control method according to claim 1 for Cross-fault leveling seismic wave, feature
Be: the reference wave that the step 1 generates includes Acceleration time course and displacement time-histories.
4. the shaking-table test control method according to claim 1 for Cross-fault leveling seismic wave, feature
It is: the step 2 specifically: high-pass filtering is carried out to reference wave Acceleration time course, low pass is carried out to reference wave displacement time-histories
Filtering, obtains the high frequency acceleration signal and low frequency displacement signal of reference wave, rule of thumb, cutoff frequency can take 0.5Hz.
5. the shaking-table test control method according to claim 1 for Cross-fault leveling seismic wave, feature
It is: the step 3 specifically: amplitude modulation is carried out to reference wave high frequency acceleration signal, is adjusted to table top aimed acceleration peak value,
And the high frequency Acceleration time course input system after amplitude modulation is calculated into displacement drive signal, it is iterated operation when necessary, obtains high
Frequency displacement drive signal.
6. the shaking-table test control method according to claim 1 for Cross-fault leveling seismic wave, feature
It is: the step 4 specifically: amplitude modulation is carried out to the low frequency displacement signal of reference wave, obtains the low of target floor permanent displacement
Frequency displacement time-histories, target floor permanent displacement can need to choose according to test.
7. the shaking-table test control method according to claim 1 for Cross-fault leveling seismic wave, feature
It is: the step 6 specifically: the wideband displacement drive signal for generating step 5 inputs earthquake simulation shaking table control system
It realizes the control to shake table, completes the Research on Shaking Table for Simulating of Cross-fault leveling seismic wave.
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| CN112269207A (en) * | 2020-11-06 | 2021-01-26 | 中国地震局工程力学研究所 | Strong vibration displacement time course simulation method with permanent displacement |
| CN117607967A (en) * | 2024-01-19 | 2024-02-27 | 中国建筑西南设计研究院有限公司 | Genetic algorithm-based earthquake motion baseline correction method and electronic equipment |
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| CN117607967A (en) * | 2024-01-19 | 2024-02-27 | 中国建筑西南设计研究院有限公司 | Genetic algorithm-based earthquake motion baseline correction method and electronic equipment |
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