CN109632535A - A kind of pseudo-static experimental method reflecting incentive action characteristic - Google Patents
A kind of pseudo-static experimental method reflecting incentive action characteristic Download PDFInfo
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Abstract
The invention discloses a kind of pseudo-static experimental methods for reflecting incentive action characteristic, comprising the following steps: determines object construction component and target excitation, according to object construction component, makes test component；Determine the dynamic respond time-histories of object construction component；According to the dynamic respond time-histories of object construction component, statistical analysis obtains the displacement amplitude and recurring number of object construction component；The pseudo-static experimental Protonation constant of building reflection target excitation action characteristic；Pseudo-static experimental load is carried out to test test specimen, obtains the hysteresis loop of object construction component.The present invention using the affiliated prototype structure of object construction component target excitation effect under dynamic respond as foundation, the shortcomings that subjective uncertain and traditional load path for determining load Con trolling index cannot reflect target excitation action characteristic in traditional pseudo-static experimental is avoided, a kind of applicable pseudo-static experimental method is provided to the Influencing Mechanism of structural elements anti-seismic performance to disclose target excitation action characteristic.
Description
Technical field
The present invention relates to Construction Anti-earthquake technical field more particularly to a kind of Quintic system examinations for reflecting incentive action characteristic
Proved recipe method.
Background technique
The type of building structure aseismatic test mainly has shaketalle test, pseudo and pseudo-static experimental.Quintic system
Test is to apply the pseudo-static test of multiple reciprocation cycle effect to structural elements, is to make structural elements in positive and negative both direction weight
It is added with the process of load and unloading, loading characteristic and deformation characteristics of the structure in of reciprocating vibration, also known as low when simulating earthquake
All repeatitive loading tests.It is important that intensity, rigidity, deformation, energy consumption of structural elements etc. can be effectively obtained by pseudo-static experimental
Information, thus for establish resilience model, Seismic damage model of concrete, shear strength calculation formula, probe into structural elements failure mechanism,
Develop and improve novel anti-seismic construction measure and technical guarantee is provided.Due to the significant economic and technical advantage of pseudo-static experimental,
The experimental technique one of most popular as Construction Anti-earthquake field.
During entire pseudo-static experimental, the most key is determining pseudo-static experimental Protonation constant.It is existing at present
Pseudo-static experimental Protonation constant effectively controls load, Bit andits control load and power and mixes control load with displacement.Power control load
It is in test loading procedure using power as Con trolling index, carries out CYCLIC LOADING by certain power amplification, but due to bending in test specimen
The power of load is difficult to control after clothes, it is easy to out-of-control phenomenon occur.Bit andits control load is during loading with yield displacement
The multiple of (including displacement of the lines, angular displacement, curvature or strain etc.) or yield displacement is as Con trolling index, by certain displacement amplification
Carry out CYCLIC LOADING.When test specimen has clear yield point, generally all using the multiple of yield displacement as controlling value.When test specimen does not have
When having clear yield point, then provide that a suitable shift standards value adds come Control experiment according to knowledge or experience by researcher
It carries, there are artificial subjective judgements for the process, can not reflect truth.It is first to be controlled with power that power, which mixes control load with displacement,
Load uses Bit andits control after test specimen reaches yield situation, until test specimen destroys.Test specimen surrender is one not smart in this method
True concept judges there is certain difficulty whether test specimen surrender, can not accurately determine the cracking load of test specimen in practical applications
And yield load, it is at present still poor by manual inspection and micro-judgment, accuracy.Further, since load path is to structure structure
The anti-seismic performance of part influences significantly, and effect of the Protonation constant that existing pseudo-static experimental uses due to that cannot reflect special incentive
Characteristic (for example Long-period Ground Motions are to " when big displacement and length are held " action characteristic of structure), therefore existing pseudo-static experimental method
It is not suitable for the antiseismic performance analysis of special incentive flowering structure component.
Summary of the invention
To solve the above-mentioned problems, the purpose of the present invention is to propose to a kind of pseudo-static experimental sides for reflecting incentive action characteristic
Method obtains object construction component using dynamic respond of the affiliated prototype structure of research object under target excitation effect as foundation
Dynamic respond, it is for statistical analysis based on rain flow method, construct the pseudo-static experimental that can reflect target excitation action characteristic
Protonation constant, mesh cannot be reflected by avoiding the uncertain and traditional load path of subjective factor bring in traditional pseudo-static experimental
The shortcomings that marking incentive action characteristic, to disclose influence of the target excitation action characteristic to structural elements anti-seismic performance and damage failure
Mechanism provides a kind of applicable pseudo-static experimental method.
In order to achieve the above object, the present invention is resolved using following technical scheme.
A kind of pseudo-static experimental method reflecting incentive action characteristic, comprising the following steps:
Step 1, object construction component and target excitation are determined, according to object construction component, production test test specimen；
Step 2, the dynamic respond time-histories of object construction component is determined；Include following sub-step:
Sub-step 2a, according to the affiliated prototype structure of object construction component target excitation effect under structural response feature,
Choose resilience model；
Sub-step 2b determines the calculating parameter of the affiliated prototype structure of object construction component, according to resilience model, establishes mesh
Mark the dynamic respond time-histories calculation procedure of the affiliated prototype structure of structural elements；
Sub-step 2c inputs target excitation, is calculated by the dynamic respond time-histories of the affiliated prototype structure of object construction component
The dynamic respond time-histories of the affiliated prototype structure of object construction component is calculated in program.
Sub-step 2d chooses according to the dynamic respond time-histories of the affiliated prototype structure of object construction component and obtains object construction
The dynamic respond time-histories of component；
Step 3, according to the dynamic respond time-histories of object construction component, statistics obtain object construction component displacement amplitude and
Recurring number.
Step 4, according to the displacement amplitude and recurring number of object construction component, building reflection target excitation action characteristic is intended
Slow test Protonation constant.
Step 5, according to the pseudo-static experimental Protonation constant of reflection target excitation action characteristic, test test specimen intend quiet
Power load, obtains the hysteresis loop of object construction component.
The characteristics of technical solution of the present invention and further improvement are as follows:
(1) step 3 includes following sub-step:
Sub-step 3a establishes the displacement amplitude and recurring number statistical model of object construction component；
Sub-step 3b sets story drift limit value；
Sub-step 3c passes through object construction according to the dynamic respond time-histories and story drift limit value of object construction component
The displacement amplitude and recurring number statistical model of component, statistics obtain the displacement amplitude and recurring number of object construction component.
(2) step 5 includes following sub-step:
Sub-step 5a determines the examination of test test specimen according to sectional dimension, material type and the predetermined axial compression ratio of test test specimen
Test axle power；
Sub-step 5b is loaded according to the pseudo-static experimental of the test axle power of test test specimen and reflection target excitation action characteristic
System carries out Quintic system load to test test specimen, obtains the hysteresis loop of object construction component.
(3) in step 1, the target excitation is filtered, wave chopping processing and amplitude modulation are handled.
(4) sub-step 2a, the structural response feature include the affiliated prototype structure of object construction component strength degradation, just
It spends and degenerates and pinch effect.
(5) sub-step 2b, the calculating parameter of the affiliated prototype structure of object construction component include object construction component institute
Belong to quality, height, initial stiffness, damping and the yield displacement of prototype structure.
(6) in sub-step 3a, the displacement amplitude and recurring number statistical model of the object construction component use rain-flow counting
Method is for statistical analysis.
Compared with prior art, dynamic respond of the present invention with the affiliated prototype structure of research object under target excitation effect
For foundation, it can be more truly reflected the stress and deformation behaviour of target excitation flowering structure component, avoid traditional Quintic system
Test subjective factor determines that the uncertain and traditional load path of load Con trolling index cannot reflect target excitation action characteristic
The shortcomings that, one kind is provided to disclose target excitation action characteristic to the Influencing Mechanism of structural elements anti-seismic performance and damage failure
Applicable pseudo-static experimental method.Meanwhile taking structural elements type with incentive action into consideration, different tests can be suitable for
Purpose, different structure element type, different incentive actions, and process is simple, has broad applicability, for Construction Anti-earthquake
Test field is of great significance.
Detailed description of the invention
The present invention is described in further details in the following with reference to the drawings and specific embodiments.
Fig. 1 is a kind of flow diagram of the pseudo-static experimental method of reflection incentive action characteristic of the invention.
Fig. 2 is a kind of experimental rig figure of the pseudo-static experimental method of reflection incentive action characteristic of the invention.
Fig. 3 is the dynamic respond time-histories figure of pier column obtained in the embodiment of the present invention.
Fig. 4 is displacement amplitude-recurring number relation curve of pier column obtained in the embodiment of the present invention.
Fig. 5 is the pseudo-static experimental Protonation constant figure of pier column obtained in the embodiment of the present invention.
Fig. 6 is the resulting pier column hysteresis loop of pseudo-static experimental in the embodiment of the present invention.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
It will be appreciated that following embodiment is merely to illustrate the present invention, and it is not construed as limiting the scope of the invention.
With reference to Fig. 1, the embodiment of the present invention provides a kind of pseudo-static experimental method for reflecting incentive action characteristic, based on being wanted
The building structure of research and type of action respond time-histories calculation procedure pair using the Elastic-plastic Displacement that can really reflect architectural characteristic
The lower displacement structure of target excitation effect, which responds, to be calculated, by rain flow method to the dynamic respond time-histories being calculated into
Row statistical analysis determines pseudo-static experimental displacement load amplitude and recurring number according to statistic analysis result, and then establishes and can reflect
The pseudo-static experimental Protonation constant of target excitation action characteristic obtains being suitable for target excitation flowering structure component antiseismic performance analysis
Pseudo-static experimental method.Described method includes following steps:
Step 1, object construction component and target excitation are determined, according to object construction component, production test test specimen；
Step 2, the dynamic respond time-histories of object construction component is determined；Include following sub-step:
Sub-step 2a, according to the affiliated prototype structure of object construction component target excitation effect under structural response feature,
Choose resilience model；
Sub-step 2b determines the calculating parameter of the affiliated prototype structure of object construction component, according to resilience model, establishes mesh
Mark the dynamic respond time-histories calculation procedure of the affiliated prototype structure of structural elements；
Sub-step 2c inputs target excitation, is calculated by the dynamic respond time-histories of the affiliated prototype structure of object construction component
The dynamic respond time-histories of the affiliated prototype structure of object construction component is calculated in program.
Sub-step 2d chooses according to the dynamic respond time-histories of the affiliated prototype structure of object construction component and obtains object construction
The dynamic respond time-histories of component；
Step 3, according to the dynamic respond time-histories of object construction component, statistics obtain object construction component displacement amplitude and
Recurring number.
Step 4, according to the displacement amplitude and recurring number of object construction component, building reflection target excitation action characteristic is intended
Slow test Protonation constant.
Step 5, according to the pseudo-static experimental Protonation constant of reflection target excitation action characteristic, test test specimen intend quiet
Power load, obtains the hysteresis loop of object construction component.
The characteristics of technical solution of the present invention and further improvement are as follows:
(1) step 3 includes following sub-step:
Sub-step 3a establishes the displacement amplitude and recurring number statistical model of object construction component；
Sub-step 3b sets story drift limit value；
Sub-step 3c passes through object construction according to the dynamic respond time-histories and story drift limit value of object construction component
The displacement amplitude and recurring number statistical model of component, statistics obtain the displacement amplitude and recurring number of object construction component.
(2) step 5 includes following sub-step:
Sub-step 5a determines the examination of test test specimen according to sectional dimension, material type and the predetermined axial compression ratio of test test specimen
Test axle power；
Sub-step 5b is loaded according to the pseudo-static experimental of the test axle power of test test specimen and reflection target excitation action characteristic
System carries out Quintic system load to test test specimen, obtains the hysteresis loop of object construction component.
(3) in step 1, the target excitation is filtered, wave chopping processing and amplitude modulation are handled.
(4) sub-step 2a, the structural response feature include the affiliated prototype structure of object construction component strength degradation, just
It spends and degenerates and pinch effect.
(5) sub-step 2b, the calculating parameter of the affiliated prototype structure of object construction component include object construction component institute
Belong to quality, height, initial stiffness, damping and the yield displacement of prototype structure.
(6) in sub-step 3a, the displacement amplitude and recurring number statistical model of the object construction component use rain-flow counting
Method is for statistical analysis.
Illustratively, longer to natural vibration period big to disclose Long-period Ground Motions " when big displacement and length are held " action characteristic
The Influencing Mechanism of reinforced concrete bridge pier column anti-seismic performance and damage failure in bridge beam, can reflect target excitation action characteristic
Pier column pseudo-static experimental for, further description of the technical solution of the present invention, comprising the following steps:
(1) object construction component and target excitation are determined
Pier column is chosen as object construction component, corresponding pier column reduced scale test test specimen is made, such as according to pier column
Shown in Fig. 2, pier column is circular cross-section, and diameter 500mm is highly 2300mm, and predetermined axial compression ratio is 0.1, concrete strength
Grade and arrangement of reinforcement meet current specifications.50 typical far field Long-period Ground Motions are chosen as target excitation.Using MATLAB
Software programming earthquake motion processing routine is filtered above-mentioned 50 typical far field Long-period Ground Motions, wave chopping, amplitude modulation etc.
Later period Elastic-plastic Displacement response time-histories calculating speed can be improved in reason in this way.
(2) the dynamic respond time-histories of object construction component is determined
Engineering in practice, the affiliated prototype structure of pier column is pier column itself, therefore, the pier column in the present embodiment
It is both object construction component and the affiliated prototype structure of object construction component.According to pier column own structural characteristics, in antidetonation point
In analysis, usually pier column is equivalent to single-degree-of-freedom system and counted by superstructure and part pier shaft mass concentration in pier top
It calculates.Since BOUC-WEN resilience model can preferably reflect that intensity of the pier column under the effect of far field Long-period Ground Motions is moved back
Change, Stiffness Deterioration and pinch effect, therefore chooses BOUC-WEN resilience model.Specifically, with MATLAB software programming list
Freedom degree Elastic-plastic Displacement responds time-histories calculation procedure, and the quality for inputting pier column is 8 tons；Height is 2300mm, initial stiffness
For 1000kN/m, damps as 10kN*s/m, yield displacement 0.01m, establish the dynamic respond time-histories calculation procedure of pier column, adopt
It is solved with dynamic respond time-histories calculation procedure of the fourth order Runge-Kutta way to pier column, it is long that 50 far fields is calculated
Periodically under shock effect pier column dynamic respond time-histories.As a result as shown in Figure 3.
(3) displacement amplitude and recurring number of object construction component are calculated
It is used to statistically analyze the rain flow method program of dynamic respond time-histories with MATLAB software programming.Set interlayer position
Moving angle is 0.25%, 0.375%, 0.5%, 0.75%, 1%, 1.5%, 2%, 3%, 4%, 5% and 6%, using rain-flow counting
Method program carries out 50 seismic displacements being calculated in step (2) response time-histories in following relative storey displacement angle range
Recurring number statistics: 0-0.25%, 0.25-0.375%, 0.375-0.5%, 0.5-0.75%, 0.75-1%, 1-1.5%,
1.5-2%, 2-3%, 3-4%, 4-5%, 5-6%, the circulation sum in each section is as the corresponding layer of section maximum value
Between angle of displacement recurring number.Following processing is done to data during specific statistics: firstly, being less than to story drift
0.2% recurring number is ignored, then carries out the statistics of recurring number in section by the above process, and each section is required to 50
Seismic displacement response time-histories is counted, and the recurring number obtained to each interval statistics is averaged, i.e., obtains statistics
For the circulation sum in each section divided by earthquake motion item number, i.e., circulation sum/50 of each interval statistics are corresponding to get the section
The average value of recurring number.Since the physical significance of recurring number determines that recurring number must be integer, to obtained circulation
Several average value carries out rounding data processing, and the specific data processing method that is rounded is that relative storey displacement amplitude is less than or equal to
4% data, the average value of recurring number take the multiple closest to the average value corresponding 3, such as: recurring number average value is 2.5
When be taken as 3, recurring number average value is taken as 3 when being 4.2；The data for being 5% and 6% for relative storey displacement amplitude, recurring number are direct
The corresponding integer being averaged, i.e. fractions omitted part, statistical result are as shown in Figure 4.
(4) the pseudo-static experimental Protonation constant of building reflection target excitation action characteristic
The displacement amplitude and recurring number that step (3) is obtained, by the ascending arrangement of displacement amplitude, by ascending arrangement
Displacement amplitude and corresponding recurring number input ORIGIN software, draw object construction component, that is, pier column displacement amplitude-follow
Number of rings relational graph, as shown in figure 5, the curve is the pier column for reflecting action characteristic when Long-period Ground Motions big displacement and length are held
Pseudo-static experimental Protonation constant.
(5) hysteresis loop of object construction component is obtained
The pier column test specimen made in step 1 is placed on electrohydraulic servo system testing machine, test specimen is loaded using styletable, axis
Load is pressed to be applied by reaction beam and hydraulic jack, horizontal thrust repeatedly is applied using MTS electro-hydraulic servo actuator, test load
Device is as shown in Figure 2.Load initial stage applies capital xial feed to predetermined axial compression ratio i.e. 0.1 by hydraulic jack.Then, by
MTS electro-hydraulic servo actuator applies horizontal low cyclic loading in capital, and pier column Protonation constant is as shown in Figure 5.Terminate test
It is subject to and tests test specimen and destroy completely, i.e., stopping when pier column reaches maximum load capacity and drops to the 85% of peak load.Examination
Testing terminates to obtain Long-period Ground Motions big displacement and the pier column hysteresis loop under the influence of action characteristic when long hold, such as Fig. 6 institute
Show.
In the present invention, when choosing the bottom column of skyscraper as research object, object construction component is the high level
The bottom column of building, the affiliated prototype structure of object construction component are the skyscraper, and therefore, test method of the invention can be with
According to the targetedly anti-seismic performance to various structure types under different incentive actions and the damage failure of experimental study purpose
Mechanism is studied, and applicability is very extensive.In the present invention, using research object as object construction component, with object construction structure
Dynamic respond of the affiliated prototype structure of part under target excitation effect is foundation, obtains object construction component dynamic respond, is based on
Rain flow method is for statistical analysis, constructs the pseudo-static experimental Protonation constant that can reflect target excitation action characteristic, avoids
The uncertain and traditional load path of subjective factor bring cannot reflect that target excitation effect is special in traditional pseudo-static experimental
Property the shortcomings that, for disclose target excitation action characteristic to structural elements anti-seismic performance and damage failure Influencing Mechanism provide one
The applicable pseudo-static experimental method of kind is of great significance for Construction Anti-earthquake test field.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modification and variations of the invention belong to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (7)
1. a kind of pseudo-static experimental method for reflecting incentive action characteristic, which comprises the following steps:
Step 1, object construction component and target excitation are determined, according to object construction component, production test test specimen；
Step 2, the dynamic respond time-histories of object construction component is determined；Include following sub-step:
Sub-step 2a chooses according to structural response feature of the affiliated prototype structure of object construction component under target excitation effect
Resilience model；
Sub-step 2b determines the calculating parameter of the affiliated prototype structure of object construction component, according to resilience model, establishes target knot
The dynamic respond time-histories calculation procedure of the affiliated prototype structure of structure component；
Sub-step 2c inputs target excitation, by the dynamic respond time-histories calculation procedure of the affiliated prototype structure of object construction component,
The dynamic respond time-histories of the affiliated prototype structure of object construction component is calculated；
Sub-step 2d chooses according to the dynamic respond time-histories of the affiliated prototype structure of object construction component and obtains object construction component
Dynamic respond time-histories；
Step 3, according to the dynamic respond time-histories of object construction component, statistics obtains the displacement amplitude and circulation of object construction component
Number；
Step 4, according to the displacement amplitude and recurring number of object construction component, the Quintic system of building reflection target excitation action characteristic
Test Protonation constant；
Step 5, according to the pseudo-static experimental Protonation constant of reflection target excitation action characteristic, Quintic system is carried out to test test specimen and is added
It carries, obtains the hysteresis loop of object construction component.
2. the pseudo-static experimental method of reflection incentive action characteristic according to claim 1, which is characterized in that step 3 packet
Containing following sub-step:
Sub-step 3a establishes the displacement amplitude and recurring number statistical model of object construction component；
Sub-step 3b sets story drift limit value；
Sub-step 3c passes through object construction component according to the dynamic respond time-histories and story drift limit value of object construction component
Displacement amplitude and recurring number statistical model, statistics obtain object construction component displacement amplitude and recurring number.
3. the pseudo-static experimental method of reflection incentive action characteristic according to claim 1, which is characterized in that step 5 packet
Containing following sub-step:
Sub-step 5a determines the test axis of test test specimen according to sectional dimension, material type and the predetermined axial compression ratio of test test specimen
Power；
Sub-step 5b loads system according to the pseudo-static experimental of the test axle power of test test specimen and reflection target excitation action characteristic
Degree carries out Quintic system load to test test specimen, obtains the hysteresis loop of object construction component.
4. the pseudo-static experimental method of reflection incentive action characteristic according to claim 1, which is characterized in that in step 1,
The target excitation is filtered, wave chopping processing and amplitude modulation are handled.
5. the pseudo-static experimental method of reflection incentive action characteristic according to claim 1, which is characterized in that sub-step
2a, the structural response feature include the strength degradation of the affiliated prototype structure of object construction component, Stiffness Deterioration and pinch effect.
6. the pseudo-static experimental method of reflection incentive action characteristic according to claim 1, which is characterized in that sub-step
2b, the calculating parameter of the affiliated prototype structure of object construction component include the affiliated prototype structure of object construction component quality,
Highly, initial stiffness, damping and yield displacement.
7. the pseudo-static experimental method of reflection incentive action characteristic according to claim 2, which is characterized in that sub-step 3a
In, the displacement amplitude and recurring number statistical model of the object construction component are for statistical analysis using rain flow method.
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| CN110940573B (en) * | 2019-10-28 | 2022-07-05 | 郑州大学 | Displacement-current hybrid control pseudo-static test loading system |
| CN110728094A (en) * | 2019-10-29 | 2020-01-24 | 黑龙江科技大学 | Novel overall structure pseudo-static test method |
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| CN110909412B (en) * | 2019-12-09 | 2021-06-01 | 江南大学 | MATLAB-based force displacement curve main characteristic point batch processing method |
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| CN112051079B (en) * | 2020-08-02 | 2022-09-09 | 中交第四公路工程局有限公司 | Bridge girder erection machine load test method |
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