CN112033805A - Method and device for monitoring concrete uniaxial compression cross section area in real time - Google Patents
Method and device for monitoring concrete uniaxial compression cross section area in real time Download PDFInfo
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- CN112033805A CN112033805A CN202010812515.7A CN202010812515A CN112033805A CN 112033805 A CN112033805 A CN 112033805A CN 202010812515 A CN202010812515 A CN 202010812515A CN 112033805 A CN112033805 A CN 112033805A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 21
- 230000006835 compression Effects 0.000 title claims abstract description 18
- 238000007906 compression Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 48
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000015654 memory Effects 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 7
- 238000011160 research Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/28—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring areas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a method and a device for monitoring the area of a uniaxial compression cross section of concrete in real time, wherein the method comprises the following steps: preparing a standard test block of the concrete to be tested; sleeving the strain band on the tested concrete standard test block; placing the tested concrete standard test block sleeved with the strain band in a pressurizing station of a testing machine; starting the testing machine to pressurize the tested concrete standard test block, and reading the stress data of the tested concrete standard test block after being pressurized by the strain band; and drawing a stress-strain curve of the uniaxial compression cross section area of the concrete by using the compression data of the testing machine and the stress data read by the strain band. The stress data after the testing machine is pressurized is read by sleeving the strain belt on the tested concrete standard test block and is matched with the pressurization data of the testing machine, so that the stress-strain relation of the concrete in a uniaxial compression state is reflected in real time, more accurate curve data are brought to the research of materials, and reliable basis can be brought to the structural design by reflecting the stress-strain relation in real time.
Description
Technical Field
The invention relates to the field of civil engineering, in particular to a method and a device for monitoring the area of a single-shaft pressed cross section of concrete in real time.
Background
In civil engineering, the strength (compressive strength standard value, compressive strength design value) of a concrete material is obtained by probability statistics of the results of multiple sets of uniaxial compression experiments. The dimension of strength is the dimension of stress (stress force/area). In the concrete uniaxial compression experiment, the applied pressure can be read by a testing machine, but the continuous change of the cross section area is difficult to monitor, so the stress calculation in civil engineering application still uses the original cross section area to calculate the stress, and further defines the strength value of the material for civil engineering design, but the stress (strength) is not real stress but nominal stress.
The theoretical transverse strain can be obtained by multiplying the vertical strain by the poisson ratio, but the result is only an approximate value, the strength of the concrete is highly discrete, and therefore the theory cannot truly reflect the real transverse deformation of the concrete. At the present stage, no related device is specially used for measuring the real-time deformation of the cross section of the concrete under the uniaxial compression state.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the technical problem to be solved by the invention is to provide a method and a device for monitoring the area of a uniaxial compression cross section of concrete in real time, which can truly reflect the stress-strain relationship so as to bring reliable basis for structural design.
According to an embodiment of the first aspect of the invention, the method for monitoring the uniaxial compressive cross-sectional area of the concrete in real time comprises the following steps: preparing a standard test block of the concrete to be tested; sleeving the strain band on the tested concrete standard test block; placing the tested concrete standard test block sleeved with the strain band in a pressurizing station of a testing machine; starting the testing machine to pressurize the tested concrete standard test block, and reading the stress data of the tested concrete standard test block after being pressurized by the strain band; and drawing a stress-strain curve of the uniaxial compression cross section area of the concrete by using the compression data of the testing machine and the stress data read by the strain band.
According to the embodiment of the first aspect of the invention, the method for monitoring the uniaxial compressive cross section area of the concrete in real time has at least the following beneficial effects: the stress data after the testing machine is pressurized is read by sleeving the strain belt on the tested concrete standard test block, and the stress data is matched with the pressurizing data of the testing machine, so that the stress-strain relation of the concrete in a uniaxial pressurized state is reflected in real time, more accurate curve data are brought for the research of materials, uncertain factors brought by the concrete strength discreteness are reduced, and reliable basis can be brought for structural design by reflecting the stress-strain relation in real time.
According to some embodiments of the first aspect of the present invention, the stress data read by the strain gauge is stored in the built-in memory in a table format.
According to some embodiments of the first aspect of the present invention, the stress data read by the strain gauge is transmitted to an application terminal through a wireless transmission module.
According to some embodiments of the first aspect of the present invention, the wireless transmission module is a bluetooth module, a WiFi module or a GPRS module.
According to some embodiments of the first aspect of the present invention, the application terminal is a smartphone, a tablet computer or a computer.
According to the embodiment of the second aspect of the invention, the device for monitoring the uniaxial compressive cross-sectional area of the concrete in real time uses any one of the methods for monitoring the uniaxial compressive cross-sectional area of the concrete in real time.
The device for monitoring the uniaxial compressive cross-sectional area of the concrete in real time according to the embodiment of the second aspect of the invention has at least the following beneficial effects: the stress data after the testing machine is pressurized is read by sleeving the strain belt on the tested concrete standard test block, and the stress data is matched with the pressurizing data of the testing machine, so that the stress-strain relation of the concrete in a uniaxial pressurized state is reflected in real time, more accurate curve data are brought for the research of materials, uncertain factors brought by the concrete strength discreteness are reduced, and reliable basis can be brought for structural design by reflecting the stress-strain relation in real time.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of a method for monitoring the uniaxial compressive cross-sectional area of concrete in real time according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, a method for real-time monitoring of uniaxial compressive cross-sectional area of concrete according to an embodiment of the first aspect of the present invention includes:
preparing a standard test block of the concrete to be tested;
sleeving the strain band on the tested concrete standard test block;
placing the tested concrete standard test block sleeved with the strain band in a pressurizing station of a testing machine;
starting the testing machine to pressurize the tested concrete standard test block, and reading the stress data of the tested concrete standard test block after being pressurized by the strain band;
and drawing a stress-strain curve of the uniaxial compression cross section area of the concrete by using the compression data of the testing machine and the stress data read by the strain band.
The stress data after the testing machine is pressurized is read by sleeving the strain belt on the tested concrete standard test block, and the stress data is matched with the pressurizing data of the testing machine, so that the stress-strain relation of the concrete in a uniaxial pressurized state is reflected in real time, more accurate curve data are brought for the research of materials, uncertain factors brought by the concrete strength discreteness are reduced, and reliable basis can be brought for structural design by reflecting the stress-strain relation in real time.
In some embodiments according to the first aspect of the present invention, the stress data read by the strain tape is stored in the built-in memory in a table format. Of course, the form of the stored files can be changed, and the memory can be replaced by other forms of memories
In some embodiments according to the first aspect of the present invention, the stress data read by the strain band is transmitted to the application terminal through the wireless transmission module, and the wireless transmission module can transmit the stress data to the background terminal in real time, so as to facilitate timely processing.
In some embodiments according to the first aspect of the present invention, the wireless transmission module is a bluetooth module, a WiFi module or a GPRS module, and different wireless transmission modules may be selected according to different field conditions.
In some embodiments according to the first aspect of the present invention, the application terminal is a smart phone, a tablet computer, or a computer, thereby improving the versatility.
According to the embodiment of the second aspect of the invention, the device for monitoring the uniaxial compressive cross-sectional area of the concrete in real time uses any one of the methods for monitoring the uniaxial compressive cross-sectional area of the concrete in real time.
This device establishes the area of meeting an emergency through the cover on being surveyed concrete standard test block, reads the stress data after the testing machine pressurization, cooperates with the pressurization data of testing machine, reflects the stress-strain relation of concrete under the unipolar compression state in real time, brings more accurate curve data for the research of material to reduce because the uncertain factor that concrete intensity dispersion brought, thereby reflect the stress-strain relation in real time and can bring reliable foundation for structural design.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and any technical means that can achieve the object of the present invention by basically the same means is within the scope of the present invention.
Claims (6)
1. A method for monitoring the area of a uniaxial compression cross section of concrete in real time is characterized by comprising the following steps: comprises that
Preparing a standard test block of the concrete to be tested;
sleeving the strain band on the tested concrete standard test block;
placing the tested concrete standard test block sleeved with the strain band in a pressurizing station of a testing machine;
starting the testing machine to pressurize the tested concrete standard test block, and reading the stress data of the tested concrete standard test block after being pressurized by the strain band;
and drawing a stress-strain curve of the uniaxial compression cross section area of the concrete by using the compression data of the testing machine and the stress data read by the strain band.
2. The method for monitoring the uniaxial compressive cross-sectional area of the concrete in real time according to claim 1, wherein the stress data read by the strain band is stored in a built-in memory in a table form.
3. The method for monitoring the uniaxial compressive cross-sectional area of the concrete in real time according to claim 1 or 2, wherein the stress data read by the strain band is transmitted to an application terminal through a wireless transmission module.
4. The method for monitoring the uniaxial compressive cross-sectional area of the concrete in real time according to claim 3, wherein the wireless transmission module is a Bluetooth module, a WiFi module or a GPRS module.
5. The method for monitoring the uniaxial compressive cross-sectional area of the concrete in real time according to claim 3, wherein the application terminal is a smart phone, a tablet personal computer or a computer.
6. An apparatus for real-time monitoring of uniaxial compressive cross-sectional area of concrete, wherein the apparatus uses a method for real-time monitoring of uniaxial compressive cross-sectional area of concrete as claimed in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010812515.7A CN112033805A (en) | 2020-08-13 | 2020-08-13 | Method and device for monitoring concrete uniaxial compression cross section area in real time |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010812515.7A CN112033805A (en) | 2020-08-13 | 2020-08-13 | Method and device for monitoring concrete uniaxial compression cross section area in real time |
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| CN112033805A true CN112033805A (en) | 2020-12-04 |
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| CN202010812515.7A Pending CN112033805A (en) | 2020-08-13 | 2020-08-13 | Method and device for monitoring concrete uniaxial compression cross section area in real time |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221503A (en) * | 2011-06-08 | 2011-10-19 | 西南交通大学 | Single-shaft tensile overall true stress-true strain curve testing technique |
| CN103792143A (en) * | 2014-02-12 | 2014-05-14 | 奇瑞汽车股份有限公司 | Quick acquisition method of true stress strain curve in whole process of uniaxial drawing |
| CN107449664A (en) * | 2017-05-05 | 2017-12-08 | 交通运输部公路科学研究所 | The method that concrete absolute stress under uniaxial compression is measured using scattered ultrasonic wave method |
| CN108458929A (en) * | 2018-03-22 | 2018-08-28 | 安徽工业大学 | A method of measuring material true stress |
-
2020
- 2020-08-13 CN CN202010812515.7A patent/CN112033805A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221503A (en) * | 2011-06-08 | 2011-10-19 | 西南交通大学 | Single-shaft tensile overall true stress-true strain curve testing technique |
| CN103792143A (en) * | 2014-02-12 | 2014-05-14 | 奇瑞汽车股份有限公司 | Quick acquisition method of true stress strain curve in whole process of uniaxial drawing |
| CN107449664A (en) * | 2017-05-05 | 2017-12-08 | 交通运输部公路科学研究所 | The method that concrete absolute stress under uniaxial compression is measured using scattered ultrasonic wave method |
| CN108458929A (en) * | 2018-03-22 | 2018-08-28 | 安徽工业大学 | A method of measuring material true stress |
Non-Patent Citations (1)
| Title |
|---|
| 晏小欢 等: "混凝土单轴受压全过程变异性试验研究", 同济大学学报(自然科学版), vol. 44, no. 05, 31 May 2016 (2016-05-31), pages 1 - 2 * |
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