CN203941136U - A kind of Reason of Hydraulic Structural Damage monitoring Dynamic loading test platform - Google Patents
A kind of Reason of Hydraulic Structural Damage monitoring Dynamic loading test platform Download PDFInfo
- Publication number
- CN203941136U CN203941136U CN201420271716.0U CN201420271716U CN203941136U CN 203941136 U CN203941136 U CN 203941136U CN 201420271716 U CN201420271716 U CN 201420271716U CN 203941136 U CN203941136 U CN 203941136U
- Authority
- CN
- China
- Prior art keywords
- concrete
- cushion cap
- ceramic piece
- piezoelectric ceramic
- steel plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 53
- 230000006378 damage Effects 0.000 title claims abstract description 34
- 238000012544 monitoring process Methods 0.000 title claims abstract description 29
- 239000000919 ceramic Substances 0.000 claims description 72
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 230000000694 effects Effects 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 11
- 230000036541 health Effects 0.000 abstract description 9
- 238000013461 design Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 17
- 230000005484 gravity Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 8
- 239000004568 cement Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000035882 stress Effects 0.000 description 7
- 230000035515 penetration Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000003745 diagnosis Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000009429 distress Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000007170 pathology Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 231100000749 chronicity Toxicity 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000008717 functional decline Effects 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses a kind of Reason of Hydraulic Structural Damage monitoring Dynamic loading test platform, involving vibrations platform (1), waveform generator (2), driver (3), sensor (4), digital collection device (5), digital filter (6), Hydro-concrete Structures body to be measured (7) and multifunctional concrete structure connect cushion cap (8); The utility model is significant to realizing hydraulic concrete structure for health monitoring, there is the advantages such as precision is high, laying is simple, monitoring cost is low, work efficiency is high, engineering adaptability is strong, the multifunctional concrete structure of its unique design connects cushion cap can once carry out many group tests and reusable, and has greatly improved efficiency and the accuracy of Dynamic loading test.
Description
Technical field
The utility model relates to a kind of Reason of Hydraulic Structural Damage monitoring Dynamic loading test platform, belongs to material field of measuring technique.
Background technology
Crack is the key reaction of the aging and pathology of Hydro-concrete Structures, very large to the harm of xoncrete structure.It is the modal damage pathology of Hydro-concrete Structures, and its generation and development are one of key characters of structure function decline, and the adaptability of structure, permanance, load-bearing capacity etc. are had to material impact, even can cause structural failure accident.Effective identification for crack damage is an important content of hydraulic concrete structure for health detection and diagnosis, needs in a hurry ripe new material and the introducing of new technology, reaches monitoring and controlling in real time, efficiently and accurately Reason of Hydraulic Structural Damage.
Piezoceramic transducer has that Hz-KHz is wide, fast response time, simple in structure, power consumption is few, low cost and other advantages, and the induction monitoring that the structural healthy monitoring system consisting of it can be sensitive is to the existence of structural damage and the situation of change of intensity.In hydraulic concrete structure for health active monitoring process, be used as sensor and driver, weaken to a certain extent external environment and changed the impact on piezoelectric ceramic piece, can extend the serviceable life of piezoelectric ceramic piece, guaranteed validity and the chronicity of monitoring structural health conditions.
Due to the complicacy of distress in concrete damage, determine that the sensitive frequency of damage is very difficult.
Utility model content
Goal of the invention: the purpose of this utility model is for the deficiencies in the prior art, a kind of Reason of Hydraulic Structural Damage monitoring Dynamic loading test platform providing.
Inventor's discovery, the amplitude of signal is the parameter comparatively responsive to concrete strength, therefore signal amplitude can be used as the key character parameter of damage identification; It is less that distress in concrete damages the impact bringing to basic frequency of signal, but the attenuation degree of signal amplitude has obvious impact while changing, and illustrates that basic frequency of signal is to affect the key factor of signal to susceptibility to damage; Suggestion adopts swept-frequency signal as damage monitoring signal, and swept-frequency signal frequency has certain variation range, contributes to improve the susceptibility of signal to damage.
Inspiration based on above-mentioned research, according to the Dynamic loading test of damages of concrete structures, the concrete piezoelectric ceramics smart module (CPSM, Concrete PZT Smart Module) by burying underground in pairs in concrete model, can realize above-mentioned discovery;
In permanent process of the test, provide the shaking table of dynamic load can not meet well the demand of concrete for hydraulic structure Dynamic loading test, deficiency based on its practical application, research and develop a kind of multifunctional concrete structure and connected cushion cap, this cushion cap is mainly for connecting the shaking table of concrete for hydraulic structure test specimen and different size, and it can once complete many group tests, and can freely dismantle, reuse, improved test efficiency, strengthened comparison test analysis effect; Greatly avoid a series of problem of bringing due to operation test specimen being pasted on platform, improved test accuracy.
Technical scheme: Reason of Hydraulic Structural Damage monitoring Dynamic loading test platform of the present utility model, involving vibrations platform, waveform generator, driver, sensor, digital collection device, digital filter, Hydro-concrete Structures body to be measured and multifunctional concrete structure connect cushion cap; Described concrete body to be measured connects cushion cap by multifunctional concrete structure and is connected to shaking table; Described driver and sensor are piezoelectric ceramics smart module, and the two ends of concrete body to be measured are imbedded respectively or sticked on to described driver and described sensor; Described piezoelectric ceramics smart module comprises piezoelectric ceramic piece, sulphurated siliastic layer, signal wire and external wrapping concrete, described sulphurated siliastic layer is coated on the periphery of described piezoelectric ceramic piece, and the piezoelectric ceramic piece that is coated with sulphurated siliastic layer is embedded in external wrapping concrete; One end of described signal wire is welded on piezoelectric ceramic piece, and the other end is through external wrapping concrete.
As preferably, described multifunctional concrete structure connects cushion cap and comprises cushion cap, and the bottom of described cushion cap has the button groove of pinching, and described pinch of button fixed and pinch detained with being installed with bottom in groove; The top of described cushion cap has fixation steel plate groove, and described fixation steel plate has been embedded in I shape fixation steel plate with groove, and described activity plate platform is fixedly installed in the I-shaped recess of I shape fixation steel plate to stationary installation by vertical stationary installation and level.
Piezoelectric ceramic piece is a kind of piezoelectric of manual manufacture, is the material of ferroelectrics one class; The concrete covering of piezoelectric ceramic piece, it mainly consists of sand-cement slurry; Signal wire, be generally after the dry tack free of piezoelectric ceramic piece welding and on; Single component sulphurated siliastic quality is soft, good waterproof performance, and can avoid preferably the stress concentration phenomenon that may occur in piezoelectric ceramic piece Transducers Embedded in Concrete, consider that piezoelectric ceramic piece self material is more crisp, generally in piezoelectric ceramic piece periphery, cover one deck single component sulphurated siliastic to reach the effect of the piezoelectric ceramic piece in protection Transducers Embedded in Concrete; Stress, displacement from piezoelectric ceramic piece to outer concrete transmittance process along rounded equipotential surface in polarised direction, so the right build of piezoelectric ceramics smart module generally can be used right cylinder.
Utilize piezoelectric ceramic piece as in the monitoring structural health conditions of main sensors element and diagnosis, the common combination based on body construction has two kinds, adhesive type and flush type.The concrete monitoring pattern that adopts which kind of mode to depend primarily on the material characteristics of body construction and adopt etc.A kind of front method is to after piezoelectric ceramics smart module and the polishing of structure contact site and wiping processing, and piezoelectric ceramics smart module is directly sticked on to body structure surface.A kind of rear method is that piezoelectric ceramics smart module is embedded in to body construction inside, therefore can weaken to a certain extent the external environments such as temperature, humidity, change the impact on piezoelectric ceramics smart module, effective encapsulation of piezoelectric ceramics smart module is the gordian technique of taking flush type need to pay attention to especially in conjunction with mode.
Fundamental characteristics based on piezoelectric ceramics and engineering actual conditions, the making flow process of piezoelectric ceramics smart module is: 1. select piezoelectric ceramic piece.Because piezoelectric ceramics smart module need to have the ability that transmits and receives ultrasonic signal concurrently, so must consider the factors such as emissive power and susceptibility while selecting piezoelectric ceramic piece; 2. ceramic cutting sheet.Utilize glass cutter that piezoelectric ceramic piece is cut into the fixedly little piezoelectric ceramic piece of specification, and remove surperficial oxide film with alcohol; 3. welding signal line and protection piezoelectric ceramic piece.Welding lead after dry tack free, reaches the piezoelectric ceramic piece in protection Transducers Embedded in Concrete at its peripheral one deck single component sulphurated siliastic that covers; 4. by sand-cement slurry, carry out building of smart module.
This cushion cap can be connected with the shaking table of indoor different size, the I shape fixation steel plate of unique design, realized innovatively the effect that once can simultaneously carry out many group Dynamic loading tests, and can greatly avoid in former process of the test, needing test specimen to bond to the drawbacks such as shaking table, improve widely test efficiency, strengthened authenticity and the reliability of analysis of experiments.
During use, the basic step of utilizing above-mentioned Reason of Hydraulic Structural Damage active monitoring platform to carry out Reason of Hydraulic Structural Damage monitoring is:
(1) determine the number of test-pieces that single test is required, it is directly determining to configure the number of I shape fixation steel plate, wherein between two I shape fixation steel plates, fix a concrete for hydraulic structure test specimen, on cushion cap, be labeled with scale, can determine according to the length of its gauge length the installation position of I shape fixation steel plate.
(2) the fixing button of pinching in bottom is positioned over to pinch button with in groove, according to shaking table physical size, pull the fixing button of pinching in bottom that cushion cap is fixed on vibration table, according to the determined number of test-pieces of above-mentioned steps, settle I shape fixation steel plate, and be positioned over fixation steel plate with in groove, then concrete for hydraulic structure test specimen is positioned between I shape fixation steel plate, usage level bolt and leveling screw cap are fixed its level.
(3) use vertical bolt that waling stripe is fixed between cushion cap and activity plate platform, concrete for hydraulic structure test specimen is realized vertical fixing.
(4) waveform generator transmitting sine sweep pumping signal, excitation piezoelectric ceramics smart module driver firing stress ripple signal; Stress wave signal is propagated in Hydro-concrete Structures body to be measured, and the piezoelectric ceramics smart module sensor being arranged in Hydro-concrete Structures body to be measured receives, and then can realize the process of the test of concrete for hydraulic structure dynamic load.
The utility model compared with prior art, its beneficial effect is: the utility model can utilize concrete piezoelectric ceramics smart module (CPSM) to carry out Damage Assessment Method and diagnosis, and the defect part of the utility model based on vibration platform apparatus in concrete for hydraulic structure Dynamic loading test, and the multifunctional concrete structure of special development connects cushion cap, it can once complete many group tests, and can repeatedly carry out, some drawbacks of vibration test in actual tests have greatly been overcome, greatly widened the usable range of Dynamic loading test, test efficiency and accuracy have been improved, and applied environment and the feature of the utility model based on hydro-structure health monitoring and diagnosis, determined design and the manufacturing process of concrete piezoelectric ceramics smart module, piezoelectric ceramic piece safeguard procedures, outsourcing material are formed and the key technique such as build be studied.
And then, final design a set of damages of concrete structures based on piezoelectric ceramics smart module monitoring test platform, the damage monitoring field of Hydro-concrete Structures is had to most important theories and practical significance.Test platform of the present utility model is significant to realizing hydraulic concrete structure for health monitoring, piezoceramic material has that response is fast, active sensing, application are simple, can make inhomogeneity shape and low-cost feature, multifunctional concrete structure connects cushion cap can effectively improve the every effect of Dynamic loading test, makes this test platform have the dramatic benefits such as precision is high, laying is simple, monitoring cost is low, work efficiency is high, engineering adaptability is strong.
Accompanying drawing explanation
Fig. 1 is Reason of Hydraulic Structural Damage monitoring Dynamic loading test platform composition diagram;
Fig. 2 is the structural representation that in Fig. 1, multifunctional concrete structure connects cushion cap;
Fig. 3 is the structural representation of cushion cap and activity plate platform in Fig. 2;
Fig. 4 is the structural representation of I shape fixation steel plate in Fig. 2;
Fig. 5 is the fixing structural representation of pinching button in bottom in Fig. 2;
Fig. 6 be in Fig. 2 level to the structural representation of stationary installation;
Fig. 7 is the dSPACE realistic model figure for structure for health diagnosis under dynamic loading;
Fig. 8 is that gravity dam model test piece geometric parameter and CPSM arrange schematic diagram;
Fig. 9 is the basic composition schematic diagram of CPSM.
Embodiment
Below technical solutions of the utility model are elaborated, but protection domain of the present utility model is not limited to described embodiment.
embodiment 1:as shown in Figure 1, involving vibrations platform 1, waveform generator 2, driver 3, sensor 4, digital collection device 5, digital filter 6, tested Hydro-concrete Structures body 7, multifunctional concrete structure connect cushion cap 8 to the utility model device Reason of Hydraulic Structural Damage monitoring Dynamic loading test platform; Tested Hydro-concrete Structures body 7 is arranged on shaking table 1, and concrete body 7 to be measured connects cushion cap 8 by multifunctional concrete structure and is connected on shaking table 1.
As shown in Figure 2, multifunctional concrete structure connects cushion cap 8 and comprises cushion cap 8-6, and the bottom of cushion cap 8-6 has the button of pinching groove 8-7, pinches button with being installed with the fixing button 8-3 that pinches in bottom in groove 8-7; The top of cushion cap 8-6 has fixation steel plate groove 8-8, fixation steel plate has been embedded in I shape fixation steel plate 8-2 with groove 8-8, and activity plate platform 8-1 is fixedly installed in the I-shaped recess of I shape fixation steel plate 8-2 to stationary installation 8-5 by vertical stationary installation 8-4 and level.
As shown in Figure 3, the top of cushion cap 8-6 has fixation steel plate groove 8-8, and bottom is left to pinch to detain and used groove 8-7, and fixation steel plate is with also comprising activity plate platform 8-1 in groove 8-8.
As shown in Figure 4, vertical bolt 8-4-1 is realized the vertical of I shape fixation steel plate 8-2 is fixed by waling stripe 8-4-2, and corresponding two the vertical stationary installation 8-4 of each I shape fixation steel plate 8-2.
As shown in Figure 5, the fixing button 8-3 that pinches in bottom comprises T-shaped connecting portion and the L shaped fixed part that is connected in bottom, and set bolt 8-3-2 is installed on fixed part, and the top of set bolt 8-3-2 has fixedly cake 8-3-1.
As shown in Figure 6, level mainly realizes level to fixing function by leveling screw 8-5-1 and leveling screw cap 8-5-2 to stationary installation 8-5.
As shown in Figure 7, its realistic model for setting up by MATLAB/Simulink, in figure, MUX ADC is RTI module.
As shown in Figure 8, near the paired piezoelectric ceramics smart module of burying underground the in advance dam heel of gravity dam model and toe, wherein PZT-1-1, PZT-2-1 are driver, PZT-1-2, PZT-2-2 are sensor.
As shown in Figure 9, the peripheral parcel sulphurated siliastic of piezoelectric ceramic piece 10 layer 12, it is embedded in external wrapping concrete 9, and in piezoelectric ceramics smart module, one end of signal wire 11 is welded on piezoelectric ceramic piece 10, and the other end is through external wrapping concrete 9.
During test, I shape fixation steel plate 8-2 is positioned over to fixation steel plate with in groove 8-8, between two I shape fixation steel plate 8-2, place concrete for hydraulic structure test specimen, usage level bolt 8-5-1 and leveling screw cap 8-5-2 fix its level, use vertical bolt 8-4-1 that waling stripe 8-4-2 is fixed between cushion cap 8-6 and activity plate platform 8-1, concrete for hydraulic structure test specimen 7 is realized vertical fixing; 2 pairs of drivers 3 of waveform generator send after swept-frequency signal, and excitation driver 3 produces stress wave, and stress wave is propagated and received by sensor 4 in tested Hydro-concrete Structures body 7, and stress wave signal passes through digital filter 6, digital collection device 5 successively again; Driver 3 and sensor 4 are piezoelectric ceramics smart module, and the two ends of Hydro-concrete Structures body 7 to be measured are imbedded respectively or sticked on to driver 3 and sensor 4; Piezoelectric ceramics smart module comprises piezoelectric ceramic piece 10, sulphurated siliastic layer 12, signal wire 11 and external wrapping concrete 9, sulphurated siliastic layer 12 is coated on the periphery of piezoelectric ceramic piece 10, and the piezoelectric ceramic piece 10 that is coated with sulphurated siliastic layer 12 is embedded in external wrapping concrete 9; One end of signal wire 11 is welded on piezoelectric ceramic piece 10, and the other end is connected with other components and parts through external wrapping concrete 9.
For Hydro-concrete Structures body to be monitored, adopt gravity dam model to test, the paired CPSM that buries underground in concrete gravity dam model, shaking table output signal is sine sweep signal; Swept-frequency signal is by signal generator-Agilent33250A AWG (Arbitrary Waveform Generator); Swept-frequency signal has an original frequency, finishes the basic parameters such as frequency and frequency sweep time; For the data that guarantee to gather can comparatively accurately reflect actual RST, the sample frequency of the present embodiment by dSPACE collection signal is maximum proportion 10 times; Wave filter adopts Hi-pass filter, and its cutoff frequency is 120Hz, and object is the frequency of shaking table sinusoidal signal and alternating current to filter out, and to reduce shaking table signal, CPSM is received to the impact of signal.
By the proving installation of above-mentioned structure, the Reason of Hydraulic Structural Damage testing process of this utility model based on piezoelectric smart module is as follows:
Step 1, design and the monitored structure of making concrete.In order to reduce the interference to CPSM signal as far as possible, improve the signal quality of CPSM, adopt the water cement ratio identical with concrete piezoelectric ceramics smart module, in the present embodiment, make water: fine sand: cement=1:2.9:2.09, accompanying drawing 8 is shown in by the concrete gravity dam model of building;
Prepare concrete piezoelectric smart module: because piezoelectric ceramics smart module need to have the ability that transmits and receives ultrasonic signal concurrently, therefore must consider the factors such as emissive power and susceptibility while selecting piezoelectric ceramic piece, in the present embodiment, select the PIC151 type piezoelectric ceramic piece of PCB company, utilize glass cutter that piezoelectric ceramic piece is cut into specification for the little piezoelectric ceramic piece of length x width x thickness=10 mm * 10 mm * 1mm, with alcohol, remove surperficial oxide film, welding lead after dry tack free, welded again and cleaned with alcohol, with SD-5TC model single component sulphurated siliastic, protect the piezoelectric ceramic piece in Transducers Embedded in Concrete, adopt C32.5 portland cement, fine aggregate, with water, fine aggregate, the weight ratio of cement is that the sand-cement slurry of 1:2.9:2.09 is carried out building of smart module, structure as shown in Figure 8.Consider the supporting and comparative analysis of other instruments, in test, concrete piezoelectric ceramics smart module is cast into
the right cylinder of 25mm * (25 ~ 30) mm, is placed on piezoelectric ceramics smart module that in standard curing box for cement concrete, maintenance is after 28 days, and in piezoelectric ceramics smart module, piezoelectric ceramic piece external wrapping concrete reaches after some strength, can be used for monitoring.
Step 2, determine the combination of piezoelectric ceramic piece and body construction.In the present embodiment, piezoelectric ceramic piece is embedded in to body construction inside, therefore can weaken to a certain extent the external environments such as temperature, humidity, change the impact on piezoelectric ceramic piece, in the casting process of gravity dam model, near the paired piezoelectric ceramics smart module of burying underground in advance Dam Heel of Gravity Dam and toe, as shown in Figure 8.In figure, 13 represent piezoelectric ceramics smart module (CPSM), and wherein PZT-1-1, PZT-2-1 are driver, and PZT-1-2, PZT-2-2 are sensor;
Step 3, use the method for artificial damage to create man-made fracture.The damage mode of gravity dam model is taked the method for artificial damage, at Dam Heel of Gravity Dam position, manually cuts out crack one, and this crack is between a pair of CPSM.In test, simulated the crack of three degree of depth (25mm, 45mm, 60mm), thereby made comparisons with the model under health status.
Step 4, for the ease of narration, choosing 1 test specimen tests, need to configure two I shape fixation steel plate 8-2, scale place in the middle of cushion cap 8-6, between two I shape fixation steel plate 8-2, fix this gravity dam model test specimen, usage level bolt 8-5-1 and leveling screw cap 8-5-2 fix its level, use vertical bolt 8-4-1 that waling stripe 8-4-2 is fixed between cushion cap 8-6 and activity plate platform 8-1, this gravity dam model test specimen are realized vertical fixing.
Step 5, select piezoelectricity Fluctuation Method to carry out the monitoring of Reason of Hydraulic Structural Damage.In the present embodiment respectively for structural integrity state and penetration of fracture 25mm, penetration of fracture 45mm, tri-kinds of faulted conditions of penetration of fracture 60mm, set the equivalent acceleration (1.0g, 1.2g, 1.4g, 1.6g, 1.8g and 2.0) of shaking table as dynamic load, wherein shaking table output signal is sinusoidal signal, and frequency is 100Hz; Swept-frequency signal is by Agilent signal generator; Swept-frequency signal original frequency is that 150Hz, end frequency are that 1000Hz, frequency sweep time are 10s, the amplitude (150 ~ 1000Hz) in swept frequency range of the swept-frequency signal under 1.0g equivalence acceleration, CPSM(PZT-1-2 when structural health, penetration of fracture 25mm, penetration of fracture 45mm, penetration of fracture 60mm) receiving increases along with the increase of transmission frequency; For the data that guarantee to gather can comparatively accurately reflect actual RST, the sample frequency by dSPACE collection signal in the present embodiment is maximum proportion 10 times, i.e. proportion 10000Hz; Wave filter adopts Hi-pass filter, and its cutoff frequency is 120Hz, and object is the frequency of shaking table sinusoidal signal and alternating current to filter out, and to reduce shaking table signal, CPSM is received to the impact of signal.
Step 6, realize the monitoring of damages of concrete structures.Use Agilent33250A waveform generator to produce sweep sine, the driving of realization to this CPSM, the CPSM of the other end, for the reception of signal, connects the A/D joint of dSPACE, and then can realize the process of the test of the dynamic load of concrete for hydraulic structure for the CPSM of sensing.
As mentioned above, although represented and explained the utility model with reference to specific preferred embodiment, it shall not be construed as the restriction to the utility model self.Not departing under the spirit and scope prerequisite of the present utility model of claims definition, can make in the form and details various variations to it.
Claims (2)
1. a Reason of Hydraulic Structural Damage monitoring Dynamic loading test platform, is characterized in that comprising: shaking table (1), waveform generator (2), driver (3), sensor (4), digital collection device (5), digital filter (6), Hydro-concrete Structures body to be measured (7) and multifunctional concrete structure connect cushion cap (8); Described concrete body to be measured (7) connects cushion cap (8) by multifunctional concrete structure and is connected to shaking table (1); Described driver (3) and sensor (4) are piezoelectric ceramics smart module, and the two ends of concrete body to be measured (7) are imbedded respectively or sticked on to described driver (3) and described sensor (4); Described piezoelectric ceramics smart module comprises piezoelectric ceramic piece (10), sulphurated siliastic layer (12), signal wire (11) and external wrapping concrete (9), described sulphurated siliastic layer (12) is coated on the periphery of described piezoelectric ceramic piece (10), and the piezoelectric ceramic piece (10) that is coated with sulphurated siliastic layer (12) is embedded in external wrapping concrete (9); It is upper that one end of described signal wire (11) is welded on piezoelectric ceramic piece (10), and the other end is through external wrapping concrete (9).
2. a kind of Reason of Hydraulic Structural Damage according to claim 1 is monitored Dynamic loading test platform, it is characterized in that: described multifunctional concrete structure connects cushion cap (8) and comprises cushion cap (8-6), the bottom of described cushion cap (8-6) has groove (8-7) for the button of pinching, and is installed with the fixing button (8-3) of pinching in bottom in described pinch of groove for button (8-7); The top of described cushion cap (8-6) has groove for fixation steel plate (8-8), described for fixation steel plate groove (8-8) be embedded in I shape fixation steel plate (8-2), described activity plate platform (8-1) is fixedly installed in the I-shaped recess of I shape fixation steel plate (8-2) to stationary installation (8-5) by vertical stationary installation (8-4) and level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420271716.0U CN203941136U (en) | 2013-09-10 | 2014-05-26 | A kind of Reason of Hydraulic Structural Damage monitoring Dynamic loading test platform |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320562027 | 2013-09-10 | ||
| CN201320562027.0 | 2013-09-10 | ||
| CN201420271716.0U CN203941136U (en) | 2013-09-10 | 2014-05-26 | A kind of Reason of Hydraulic Structural Damage monitoring Dynamic loading test platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203941136U true CN203941136U (en) | 2014-11-12 |
Family
ID=51860440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420271716.0U Expired - Lifetime CN203941136U (en) | 2013-09-10 | 2014-05-26 | A kind of Reason of Hydraulic Structural Damage monitoring Dynamic loading test platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203941136U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866249A (en) * | 2016-05-17 | 2016-08-17 | 大连理工大学 | Embedded circular piezoceramic sensor |
| CN113607824A (en) * | 2021-08-16 | 2021-11-05 | 赵跃 | Method for monitoring cracks in concrete beam plate pouring process |
-
2014
- 2014-05-26 CN CN201420271716.0U patent/CN203941136U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866249A (en) * | 2016-05-17 | 2016-08-17 | 大连理工大学 | Embedded circular piezoceramic sensor |
| CN105866249B (en) * | 2016-05-17 | 2019-04-23 | 大连理工大学 | A kind of embedded annular piezoelectric ceramic sensor element |
| CN113607824A (en) * | 2021-08-16 | 2021-11-05 | 赵跃 | Method for monitoring cracks in concrete beam plate pouring process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | Concrete damage diagnosis using electromechanical impedance technique | |
| Lim et al. | Non-destructive concrete strength evaluation using smart piezoelectric transducer—A comparative study | |
| Karaiskos et al. | Monitoring of concrete structures using the ultrasonic pulse velocity method | |
| CN103472142A (en) | Active damage monitoring device and method for hydraulic concrete structure | |
| CN110455914B (en) | Grouting sleeve internal grouting state detection method based on built-in piezoelectric ceramic element | |
| Liu et al. | Exploratory study on water seepage monitoring of concrete structures using piezoceramic based smart aggregates | |
| CN103472095B (en) | Device and method for monitoring strength of hydraulic concrete based on piezoelectric ceramic smart module | |
| Karaiskos et al. | Performance monitoring of large-scale autonomously healed concrete beams under four-point bending through multiple non-destructive testing methods | |
| CN103995023B (en) | Concrete filled steel tubular member tube wall peels off defect inspection method with concrete interface | |
| CN103575769B (en) | A kind of piezoelectric transducer for monitoring steel bar corrosion and monitoring steel bar corrosion method | |
| CN103388378A (en) | Intelligent reinforcing steel bar based on piezoelectric ceramic crystal and fabrication method thereof | |
| Na et al. | A technique for improving the damage detection ability of the electro-mechanical impedance method on concrete structures | |
| Du et al. | Assessment of corrosion of reinforcing steel bars in concrete using embedded piezoelectric transducers based on ultrasonic wave | |
| CN104458073A (en) | Implantable concrete three-dimensional space stress monitoring sensor | |
| Appalla et al. | Assessing corrosion damage in posttensioned concrete structures using acoustic emission | |
| CN109239316B (en) | Concrete strength monitoring method based on concrete strength monitoring device | |
| CN107132274A (en) | A kind of method of testing of bridge prestress pore channel Grouted density | |
| CN203941136U (en) | A kind of Reason of Hydraulic Structural Damage monitoring Dynamic loading test platform | |
| US10620062B2 (en) | Cement-based material systems and method for self-sensing and weighing | |
| Zou et al. | A primary study on the performance of piezoceramic based smart aggregate under various compressive stresses | |
| CN203479752U (en) | Piezoelectric ceramic sensitive module and hydraulic concrete structure health monitoring testing platform | |
| CN202710517U (en) | Ultrasound monitoring sensor for corrosion of reinforcement in concrete | |
| CN104345216A (en) | Method and device for measuring specific resistance and 28-day strength of cement | |
| CN210572081U (en) | Reinforced concrete debonding monitoring devices based on piezoceramics and impedance | |
| KR101276468B1 (en) | Method for durability test of cement mixed soil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141112 |