CN205352976U - Thin testing system that breaks that sees of bulky concrete - Google Patents
Thin testing system that breaks that sees of bulky concrete Download PDFInfo
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- CN205352976U CN205352976U CN201620026400.4U CN201620026400U CN205352976U CN 205352976 U CN205352976 U CN 205352976U CN 201620026400 U CN201620026400 U CN 201620026400U CN 205352976 U CN205352976 U CN 205352976U
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Abstract
The utility model discloses a thin testing system that breaks that sees of bulky concrete, including temperature stress testing machine and acoustic emission detection device, the temperature stress testing machine includes the quick -witted case of holding concrete sample, heating cooling system, displacement sensor, force cell sensor, step motor, a controller, signal amplifier, bury the temperature sensor in the concrete sample underground, the data control stepper motor of gathering according to each sensor moves, and obtain the server of temperature stress test parameter to the data processing of each sensor collection, acoustic emission detection device is including burying the acoustic emission sensor in the concrete sample underground, signal processing unit, acoustic emission sensor is connected with the data input end of server through signal processing unit, concrete that acoustic emission sensor gathered warp data and enlargies, transmits to the server behind the digital analog conversion through signal processing unit. The utility model discloses use micro crack that the concrete appears as the test result, can realize the concrete and carefully see temperature parameters's under the crack precision measurement.
Description
Technical field
This utility model relates to a kind of mass concrete meso fracture pilot system, belongs to Hydraulic and Hydro-Power Engineering technical field.
Background technology
Distress in concrete is the physical arrangement change that xoncrete structure produces due to the effect of internal and external factor, and the research of concrete cracking has important practical significance for the technical field such as Hydraulic and Hydro-Power Engineering, civil construction project.At present, the main experimental method of research concrete cracking is constrained test method, and it is broadly divided into ring method, flat band method and axial constraint test method(s).
Ring method there is the problem that the test data discreteness obtained is comparatively serious, and is only limitted to strain value, cannot quantitative analysis for mechanical property；Temperature and constraint course are single uncontrollable, it is impossible to simulate the degree of restraint in Practical Project and temperature development course；Size-limited and the concrete of big aggregate cannot be tested.
Flat band method there is the problem that and concrete performance parameter cannot be carried out quantitative assay, it is impossible to evaluate the stress that concrete is caused by variations in temperature, is not suitable for the crack resistance evaluating mass concrete.
Axial constraint test method(s) is the test utilizing temperature stress testing machine to realize concrete bracing performance, existing temperature stress testing machine is to there is concrete macrocrack for test result in process of the test, the extension in general concrete crack is from thin sight crack, and then expand to macrocrack, therefore the test method of routine can not be reacted and carefully be seen crack.
Utility model content
In view of the foregoing, the purpose of this utility model is in that to provide a kind of mass concrete meso fracture pilot system, it is to there is concrete micro crack for result of the test, it is capable of concrete and carefully sees the accurate measurement in crack, thus beginning to take measures from early stage, the generation of prevention macrocrack.
For achieving the above object, this utility model is by the following technical solutions:
A kind of mass concrete meso fracture pilot system, including temperature stress testing machine, it includes the cabinet for housing concrete sample, heating and cooling system on cabinet, displacement transducer, force cell, motor, for controlling the controller of motor action, for the signal gathered being amplified the signal amplifier processed, it is embedded in the temperature sensor in concrete sample, for the Data Control motor action according to each sensor acquisition, and the data of each sensor acquisition are processed the server obtaining temperature stress test parameters, also include acoustic emission detection system,
This acoustic emission detection system includes the acoustic emission sensor, the signal processing unit that are embedded in described concrete sample, and this acoustic emission sensor is connected by the data input pin of this signal processing unit with described server；The concrete meso fracture signal of this acoustic emission sensor collection is amplified transmission extremely described server after process through this signal processing unit.
Further,
The described server data according to each sensor acquisition, process the temperature stress test parameters obtaining under concrete microcraking.
Described concrete sample includes constraint test specimen, described temperature sensor, acoustic emission sensor are embedded in this constraint test specimen, this temperature sensor is connected by the data input pin of a data acquisition unit with described server, and this acoustic emission sensor is connected with the data input pin of described server by this data acquisition unit, described signal processing unit.
Described concrete sample includes free test specimen, described temperature sensor, acoustic emission sensor are embedded in this free test specimen, this temperature sensor is connected by the data input pin of a data acquisition unit with described server, and this acoustic emission sensor is connected with the data input pin of described server by this data acquisition unit, described signal processing unit.
One end of described constraint test specimen is fixed in the frame of described cabinet, the other end is connected with motor by ambulatory splint, institute's displacement sensors, force cell, the control end of described server is connected with motor by described controller, and this displacement transducer is connected by the data input pin of described signal amplifier with described server.
One end of described free test specimen is fixed in the frame of described cabinet, and the other end is connected with the data input pin of described server by ambulatory splint, institute's displacement sensors, signal amplifier.
The utility model has the advantages that:
Mass concrete meso fracture pilot system of the present utility model, in conjunction with temperature stress testing machine and acoustic emission detection system, concrete micro crack to occur for result of the test, can accurately measure concrete and the thin parameters seeing the crack moment occurs, provide accurate test data for evaluating concrete cracking resistance.
Accompanying drawing explanation
Fig. 1 is the block diagram of system of the present utility model.
Fig. 2 is the functional module composition structural representation of server of the present utility model.
Detailed description of the invention
Below in conjunction with drawings and Examples, this utility model is described in further detail.
Fig. 1 is the block diagram of system of the present utility model.As it can be seen, mass concrete meso fracture pilot system disclosed in this utility model, including temperature stress testing machine, acoustic emission detection system,
Temperature stress testing machine includes the heating and cooling system 3 for housing on the cabinet 13 of concrete sample (constraint test specimen 1 and free test specimen 2), cabinet, displacement transducer 4, force cell 5, motor 6, is used for controlling the controller 8 of motor action, signal amplifier 7, the server 9 for being amplified processing to the signal of collection；The constraint test specimen (shrinking under constraints) and the free test specimen (free shrink) that are embedded with temperature sensor 10 respectively are positioned in cabinet, one end of constraint test specimen 1 and free test specimen 2 is fixed in the frame of cabinet by fixation clamp, the other end of free test specimen 2 passes through ambulatory splint, displacement transducer 4, signal amplifier 7 is connected with the data input pin of server 9, the other end of constraint test specimen 1 passes through ambulatory splint, displacement transducer 4, force cell 5 is connected with motor 6, force cell 5 and the displacement transducer 4 for measuring the displacement data of constraint test specimen are connected also by the data input pin of signal amplifier 7 with server 9, the control end of server 9 controls motor 6 action by controller 8.
When utilizing temperature stress testing machine to test, the ambient temperature in cabinet is controlled by heating and cooling system 3, in the change procedure of ambient temperature, concrete sample expands with heat and contract with cold, temperature sensor 10 gathers the temperature data of concrete sample, displacement transducer 4 gathers the displacement data of concrete sample, force cell 5 gathers constraint test specimen 1 in stress data axially, the data gathered are transmitted to server 9 by each sensor, server 9 is preset with the displacement threshold value of constraint test specimen, when the contraction or expansion displacement retraining test specimen exceedes this displacement threshold value, server 9 controls motor 6 by controller 8 and works and stretched by constraint test specimen 1 or compress, it is made to keep original length, free test specimen 2 varies with temperature and carries out Free Transform simultaneously；Change procedure along with temperature, server 9 obtains displacement and the STRESS VARIATION process data that concrete sample varies with temperature, until concrete sample ftractures (cracking macroscopically), the server 9 each item data according to each sensor acquisition, obtain the every temperature stress test parameters under concrete macroscopic view cracking, including the first zero stress time, first no pressure temperature, the maximum crushing stress time, maximum crushing stress temperature, maximum crushing stress, maximum swelling deforms, the maximum temperature time, maximum temperature, second zero stress time, second no pressure temperature, room temperature stress time, room temperature stress etc..
Acoustic emission detection system includes acoustic emission sensor 11, signal processing unit, acoustic emission sensor 11 is embedded in constraint test specimen 1 and free test specimen 2, the concrete meso fracture signal of acoustic emission sensor 11 sensing is (when there is thin sight crack in inside concrete, acoustic emission sensor senses the acoustic emission signal of inside concrete generation micro rupture) it is amplified after process to transmit to server 9 through signal processing unit, now, the temperature data of the concrete sample that server 9 is gathered by temperature sensor, the displacement data of the concrete sample that displacement transducer gathers, the stress data of the constraint test specimen that force cell gathers, obtains the every temperature stress test parameters under concrete microcraking, including the first zero stress time, first no pressure temperature, the maximum crushing stress time, maximum crushing stress temperature, maximum crushing stress, maximum swelling deforms, the maximum temperature time, maximum temperature, second zero stress time, second no pressure temperature, room temperature stress time, room temperature stress etc..
System also includes data acquisition unit 12, and the data that each temperature sensor 10, acoustic emission sensor 11 sense are transmitted to server 9 through this data acquisition unit 12.
The process that mass concrete meso fracture pilot system of the present utility model carries out testing is utilized to be:
1, constraint test specimen and free test specimen are built according to concrete mix；
2, in constraint test specimen and free test specimen, it is respectively arranged temperature sensor, acoustic emission sensor；
3, one end of two test specimens is fixedly connected in frame,
4, the other end retraining test specimen is sequentially connected with displacement transducer, force cell, motor, and this displacement transducer is connected with signal amplifier,
5, the other end of free test specimen is sequentially connected with displacement transducer, signal amplifier, server,
6, the control end of server is connected with controller, and the outfan of controller is connected with motor；
7, the data output end of each temperature sensor is connected with the data input pin of server by data acquisition unit, and the data output end of each acoustic emission sensor is connected with the data input pin of server by data acquisition unit, signal processing unit；
8, the temperature changing process of heating and cooling system is set,
9, starting temperature stress test, acoustic emission sensor real-time capture elastic wave signal, when there is microcrack, surface concrete test specimen ftractures；
10, server process obtains every temperature stress test parameters: include the first zero stress time, the first no pressure temperature, maximum crushing stress time, maximum crushing stress temperature, maximum crushing stress, maximum swelling deformation, maximum temperature time, maximum temperature, the second zero stress time, the second no pressure temperature, room temperature stress time, room temperature stress etc..
11, concrete cracking resistance parameter is evaluated by Numeral Emulation System.
As shown in Figure 2, mass concrete meso fracture pilot system of the present utility model, its server include the temperature control subsystem for controlling temperature, for loading experiment parameter Loading Control subsystem, for measure concrete macroscopic view dehiscence process measure control subsystem, for measure inside concrete micro cracking acoustic emission detection subsystem, measure the Based Intelligent Control subsystem of process for automatic control system, for processing the data process subsystem of the data of each sensor acquisition, for carrying out the numerical simulation subsystem etc. that emulates according to the data gathered.
Mass concrete meso fracture pilot system of the present utility model, it is that temperature stress testing machine is combined with acoustic emission detection system, there is various performance parameters during micro cracking in detection concrete, system is to there is concrete micro crack for result of the test, concrete can be measured accurately the thin parameters seeing the crack moment occurs, provide accurate test data for evaluating concrete cracking resistance.
The above is preferred embodiment of the present utility model and the know-why used thereof; for a person skilled in the art; when without departing substantially from spirit and scope of the present utility model; any based on apparent changes such as the equivalent transformation on technical solutions of the utility model basis, simple replacements, belong within this utility model protection domain.
Claims (6)
1. mass concrete meso fracture pilot system, including temperature stress testing machine, it includes the cabinet for housing concrete sample, heating and cooling system on cabinet, displacement transducer, force cell, motor, for controlling the controller of motor action, for the signal gathered being amplified the signal amplifier processed, it is embedded in the temperature sensor in concrete sample, for the Data Control motor action according to each sensor acquisition, and the data of each sensor acquisition are processed the server obtaining temperature stress test parameters, it is characterized in that, also include acoustic emission detection system,
This acoustic emission detection system includes the acoustic emission sensor, the signal processing unit that are embedded in described concrete sample, and this acoustic emission sensor is connected by the data input pin of this signal processing unit with described server；The concrete meso fracture signal of this acoustic emission sensor collection is amplified transmission extremely described server after process through this signal processing unit.
2. mass concrete meso fracture pilot system according to claim 1, it is characterised in that the described server data according to each sensor acquisition, processes the temperature stress test parameters obtaining under concrete microcraking.
3. mass concrete meso fracture pilot system according to claim 1, it is characterized in that, described concrete sample includes constraint test specimen, described temperature sensor, acoustic emission sensor are embedded in this constraint test specimen, this temperature sensor is connected by the data input pin of a data acquisition unit with described server, and this acoustic emission sensor is connected with the data input pin of described server by this data acquisition unit, described signal processing unit.
4. mass concrete meso fracture pilot system according to claim 1, it is characterized in that, described concrete sample includes free test specimen, described temperature sensor, acoustic emission sensor are embedded in this free test specimen, this temperature sensor is connected by the data input pin of a data acquisition unit with described server, and this acoustic emission sensor is connected with the data input pin of described server by this data acquisition unit, described signal processing unit.
5. mass concrete meso fracture pilot system according to claim 3, it is characterized in that, one end of described constraint test specimen is fixed in the frame of described cabinet, the other end is connected with motor by ambulatory splint, institute's displacement sensors, force cell, the control end of described server is connected with motor by described controller, and this displacement transducer is connected by the data input pin of described signal amplifier with described server.
6. mass concrete meso fracture pilot system according to claim 4, it is characterized in that, one end of described free test specimen is fixed in the frame of described cabinet, and the other end is connected with the data input pin of described server by ambulatory splint, institute's displacement sensors, signal amplifier.
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| CN201620026400.4U CN205352976U (en) | 2016-01-12 | 2016-01-12 | Thin testing system that breaks that sees of bulky concrete |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527311A (en) * | 2016-01-12 | 2016-04-27 | 中国水利水电科学研究院 | Mass concrete microscopic fracture testing system |
| CN106092764A (en) * | 2016-08-04 | 2016-11-09 | 清华大学 | There is ultrasonic and acoustic emission detection function concrete temperature stress testing machine |
| CN107843555A (en) * | 2017-12-20 | 2018-03-27 | 清华大学 | The detection method and device of the true adhesion strength of Arch Dam With Joint |
-
2016
- 2016-01-12 CN CN201620026400.4U patent/CN205352976U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527311A (en) * | 2016-01-12 | 2016-04-27 | 中国水利水电科学研究院 | Mass concrete microscopic fracture testing system |
| CN106092764A (en) * | 2016-08-04 | 2016-11-09 | 清华大学 | There is ultrasonic and acoustic emission detection function concrete temperature stress testing machine |
| CN107843555A (en) * | 2017-12-20 | 2018-03-27 | 清华大学 | The detection method and device of the true adhesion strength of Arch Dam With Joint |
| CN107843555B (en) * | 2017-12-20 | 2023-11-07 | 清华大学 | Method and device for detecting true bonding strength of transverse seam of arch dam |
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