CN109458976A - A kind of device and its measuring method of the strain of measurement inside concrete - Google Patents
A kind of device and its measuring method of the strain of measurement inside concrete Download PDFInfo
- Publication number
- CN109458976A CN109458976A CN201811610258.8A CN201811610258A CN109458976A CN 109458976 A CN109458976 A CN 109458976A CN 201811610258 A CN201811610258 A CN 201811610258A CN 109458976 A CN109458976 A CN 109458976A
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- Prior art keywords
- concrete
- strain
- matrix plate
- foil gauge
- plate
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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
- G01B21/32—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 the deformation in a solid
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of device of measurement inside concrete strain disclosed by the invention, including matrix plate, multiple large through-holes arranged side by side are equidistantly provided on matrix plate, multiple small through hole are provided on matrix plate, small through hole is used so that concrete fine aggregate passes through, foil gauge is fixed on matrix plate, foil gauge is located between per two adjacent large through-holes, and foil gauge is connect by conducting wire with data collecting instrument.A kind of method of measurement inside concrete strain disclosed by the invention, clamps matrix plate first with clamping plate, clamping plate is fixed on concrete casting appliance stand by fixing piece, rotates matrix plate according to different types of stress direction is tested；Again from the connection terminal extraction wire on foil gauge, so that conducting wire extends to outside concrete casting device；Last casting concrete, after concrete curing, connecting wire to data collecting instrument carries out inside concrete strain testing.The present invention can METHOD FOR CONTINUOUS DETERMINATION multiple spot concrete strain, and it is cheap.
Description
Technical field
The invention belongs to mixed mud strain measurement technical fields, and in particular to a kind of dress of measurement inside concrete strain
It sets, a kind of method for further relating to measurement inside concrete strain.
Background technique
As a kind of very universal construction material, the engineering field in China has a wide range of applications concrete.With mixed
Solidifying soil is used as component part, forms a large amount of structure or component form, such as reinforced concrete structure, steel reinforced concrete combination knot
Structure, concrete filled steel tube etc..Engineering test often carries out mechanical property test research to above structure or component, wherein logical
Measurement strain variation and the regularity of distribution are crossed, is common research means to probe into the behavior of structure or element mechanics.It generallys use
The mode of resistance strain gage is pasted outside concrete, resistance strain gage is cheap, and measurement accuracy is preferable, wide by structural test
General application.
Currently, the strain of outer surface is generally only measured for concrete, and concrete only leads to as an entity structure
Surface strain is crossed to react the stress situation of whole cross section, it is clear that be it is inappropriate, it is especially non-uniform when encountering stress distribution
Situation, it is necessary to which the strain on inside concrete section is measured.Normally, concrete structure internal strain generallys use
Optical fiber detecting method needs to bury fibre optical sensor in inside concrete, and fibre optical sensor is expensive, cannot reuse,
And the concrete strain of single-point can only be tested.
Summary of the invention
The purpose of the present invention is to provide a kind of devices of measurement inside concrete strain, being capable of METHOD FOR CONTINUOUS DETERMINATION multiple spot coagulation
Soil strain, and it is cheap.
The object of the invention is also to provide a kind of methods of measurement inside concrete strain.
The first technical solution of the present invention is: a kind of device of measurement inside concrete strain, including matrix
Plate is equidistantly provided with multiple large through-holes arranged side by side on matrix plate, and large through-hole is used so that concrete coarse aggregate passes through, matrix plate
On be provided with multiple small through hole, small through hole is evenly spaced in around each large through-hole, small through hole use so that concrete fine aggregate
Pass through, foil gauge is fixed on matrix plate, foil gauge is located between per two adjacent large through-holes, and foil gauge passes through conducting wire and number
It is connected according to Acquisition Instrument.
The features of the present invention also characterized in that
Foil gauge surface is coated with gluey protective layer.
Matrix plate two sides symmetrically offer multiple U-shaped grooves, each U-shaped groove be located at two adjacent large through-holes it
Between.
The quantity of foil gauge is 2-4.
Second of technical solution of the present invention be, a method of measurement inside concrete strain, using as above
A kind of device of measurement inside concrete strain, is specifically implemented according to the following steps:
Step 1 clamps matrix plate using clamping plate, and clamping plate is fixed on concrete casting appliance stand by fixing piece,
Matrix plate is rotated according to different types of stress direction is tested；
Step 2, from the connection terminal extraction wire on foil gauge so that conducting wire extends to outside concrete casting device；
Step 3, casting concrete, after concrete curing, connecting wire to data collecting instrument is carried out in concrete
Portion's strain testing.
Referred in step 1 according to the different types of stress direction rotation matrix plate of test: when test inside concrete drawing is answered
When power or compression, matrix plate is rotated to horizontal or vertical direction, when testing inside concrete shear stress, according to required survey
Try angular turn matrix plate.
The beneficial effects of the present invention are: the device that a kind of measurement inside concrete of the invention strains, production is simple, cost
It is cheap, by opening up through-hole on matrix plate, facilitate concrete slurry to penetrate through, and one can be formed with concrete, with coagulation
Native internal distortions, which are consistent, is conducive to test accurately, and foil gauge is fixed on matrix plate and is surveyed to inside concrete strain
Amount is arranged multiple matrix plates in inside concrete different location as needed, strains to inside concrete multiple spot, solve tradition
Optical fiber detecting method needs to bury fibre optical sensor in inside concrete, and fibre optical sensor is expensive, cannot reuse, and
And the problem of concrete strain of single-point can only be tested.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the device of measurement inside concrete strain of the present invention；
Fig. 2 is the present invention a kind of device and fixing piece connection schematic diagram of the strain of measurement inside concrete；
Fig. 3 be using the present invention it is a kind of measurement inside concrete strain device measurement mixed mud test block inside stretching strain and
The relational graph of compressive strain.
In figure, 1. matrix plates, 2. large through-holes, 3. foil gauges, 4. small through hole, 5. clamping plates, 6. fixing pieces, the acquisition of 8. data
Instrument.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
A kind of apparatus structure of measurement inside concrete strain of the present invention is as shown in Figure 1, including matrix plate 1, on matrix plate 1
Spaced set has multiple large through-holes 2 arranged side by side, and large through-hole 2 is used so that concrete coarse aggregate passes through, and is provided on matrix plate 1
Multiple small through hole 2, small through hole 2 are evenly spaced in around each large through-hole 2, and small through hole 4 is used so that concrete fine aggregate passes through,
Foil gauge 3 is fixed on matrix plate 1, foil gauge 3 is located between per two adjacent large through-holes 2, and foil gauge 3 passes through conducting wire and number
It is connected according to Acquisition Instrument 8.
Further, in order to avoid breakdown strain piece during concrete casting, 3 surface of foil gauge is coated with gluey guarantor
Sheath.
Further, matrix plate changes position during casting concrete in order to prevent, and then influences test
Precision, 1 two sides of matrix plate symmetrically offer multiple U-shaped grooves, each U-shaped groove between two adjacent large through-holes 2,
Fixing piece and the clamping of U-shaped groove further fix matrix plate.
Further, in order to guarantee the globality between matrix plate and concrete, the strain of concrete and answering for matrix plate
Become consistent, according to test request, the foil gauge 3 of different number is set, foil gauge 3 between general every two adjacent large through-holes 2
Quantity be 2-4.
A method of measurement inside concrete strain uses a kind of dress of measurement inside concrete strain as described above
It sets, is specifically implemented according to the following steps:
Step 1, as shown in Fig. 2, clamping matrix plate 1 using clamping plate 5, clamping plate 5 is fixed on concrete and is poured by fixing piece 6
On casting device bracket, matrix plate 1 is rotated according to different types of stress direction is tested；
Step 2, from the connection terminal extraction wire on foil gauge 3 so that conducting wire extends to outside concrete casting device；
Step 3, casting concrete, after concrete curing, connecting wire to data collecting instrument 8 carries out concrete
Internal strain test.
Referred in step 1 according to the different types of stress direction rotation matrix plate of test: when test inside concrete drawing is answered
When power or compression, matrix plate 1 is rotated to horizontal or vertical direction, when testing inside concrete shear stress, according to required
Test angle rotates matrix plate 1.
Embodiment
A kind of method of measurement inside concrete strain of the present invention, in casting concrete, concrete slurry is from top to bottom
Matrix plate 1 is penetrated through, the clamping plate 5 of matrix plate 1 is clamped and matrix plate 1 is fixed on the fixing piece on concrete casting appliance stand
All having high intensity ensure that matrix plate 1 will not be washed out when penetrating through matrix plate 1 in concrete slurry, matrix plate 1 generally by
Plastic plate is made, and plastics plate thickness is generally 2-6mm, and concrete slurry may make not damage matrix when penetrating through matrix plate 1
Plate 1 and the obvious deformation of generation, large through-hole 2 is opened on matrix plate 1 and small through hole 4 makes the coarse aggregate and thin bone of concrete respectively
Material perforation, in concrete casting molding, matrix plate 1 forms an entirety, and matrix plate 1 and concrete deformation with concrete
Unanimously, by the foil gauge 3 between two large through-holes 2 or strain rosette can be used concrete strain is tested, testing
When inside concrete shear stress, when specific direction, the glue parallel with 1 edge of matrix plate of foil gauge 3 on matrix plate 1 is selected
Substrate 1, the matrix plate for selecting foil gauge 3 and 1 edge of matrix plate on matrix plate 1 to be arranged at an angle when indefinite direction
1。
Stress test, experiment tool are carried out to inside concrete using a kind of device of measurement inside concrete strain of the present invention
Body process:
First matrix plate is clamped using clamping plate, it is horizontal positioned to be fixed on concrete casting appliance stand, utilize clamping plate
Second matrix plate is clamped, is vertically disposed in and is fixed on concrete casting appliance stand, the coagulation for the 150mm × 150mm that casts
Native test block forming connects data collecting instrument, lies in a horizontal plane in first matrix plate of concrete test block to measure in concrete
The stretching strain in portion is vertically disposed in and is fixed on second matrix plate of concrete test block and answers to measure the pressure of inside concrete
Become.
The relationship of the stretching strain and compressive strain that measure is as shown in figure 3, from the figure 3, it may be seen that under concrete test block axial pressure
The ratio of compressive strain and the stretching strain of portion's material 0.2 or so, meets concrete Poisson's ratio actual conditions, it was demonstrated that the present invention
Device and the test method are simple and effective.
It is an advantage of the invention that it will be apparent that being mainly manifested in:
(1) a kind of device of measurement inside concrete strain of the present invention, through-hole is opened up on matrix plate and pastes strain
Piece, structure novel, simple processing is easy to use low in cost, safe and practical；
(2) a kind of device of measurement inside concrete strain of the present invention facilitates coagulation by opening up through-hole on matrix plate
The perforation of soil paste material, and one can be formed with concrete, it is consistent with inside concrete deformation, improves the accurate of experiment
Property；
(3) a kind of method of measurement inside concrete strain of the present invention, needs according to test in inside concrete difference position
Multiple matrix plates are installed, inside concrete multiple spot can be strained.
Claims (6)
1. a kind of device of measurement inside concrete strain, which is characterized in that including matrix plate (1), the matrix plate (1) is first-class
Spacing is provided with multiple large through-holes arranged side by side (2), and the large through-hole (2) uses so that concrete coarse aggregate passes through, the matrix
It is provided on plate (1) multiple small through hole (2), the small through hole (2) is evenly spaced in around each large through-hole (2), described
Small through hole (4) is used so that concrete fine aggregate passes through, and is fixed with foil gauge (3), the foil gauge on the matrix plate (1)
(3) it is located between per two adjacent large through-holes (2), the foil gauge (3) is connect by conducting wire with data collecting instrument (8).
2. a kind of device of measurement inside concrete strain as described in claim 1, which is characterized in that the foil gauge (3)
Surface is coated with gluey protective layer.
3. a kind of device of measurement inside concrete strain as described in claim 1, which is characterized in that the matrix plate (1)
Two sides symmetrically offer multiple U-shaped grooves, and each U-shaped groove is between two adjacent large through-holes (2).
4. a kind of device of measurement inside concrete strain as described in claim 1, which is characterized in that the foil gauge (3)
Quantity be 2-4.
5. a kind of method of measurement inside concrete strain, which is characterized in that mixed using a kind of measurement as described in claim 1
The device of solidifying soil internal strain, is specifically implemented according to the following steps:
Step 1 clamps matrix plate (1) using clamping plate (5), and clamping plate (5) are fixed on concrete casting device by fixing piece (6)
On bracket, matrix plate (1) is rotated according to different types of stress direction is tested；
Step 2, from the connection terminal extraction wire on foil gauge (3) so that conducting wire extends to outside concrete casting device；
Step 3, casting concrete, after concrete curing, connecting wire to data collecting instrument (8) is carried out in concrete
Portion's strain testing.
6. a kind of method of measurement inside concrete strain as claimed in claim 5, which is characterized in that root in the step 1
Refer to according to different types of stress direction rotation matrix plate is tested: when testing inside concrete tensile stress or compression, rotation
Matrix plate (1) rotates matrix according to required test angle when testing inside concrete shear stress to horizontal or vertical direction
Plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811610258.8A CN109458976A (en) | 2018-12-27 | 2018-12-27 | A kind of device and its measuring method of the strain of measurement inside concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811610258.8A CN109458976A (en) | 2018-12-27 | 2018-12-27 | A kind of device and its measuring method of the strain of measurement inside concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109458976A true CN109458976A (en) | 2019-03-12 |
Family
ID=65615095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811610258.8A Pending CN109458976A (en) | 2018-12-27 | 2018-12-27 | A kind of device and its measuring method of the strain of measurement inside concrete |
Country Status (1)
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|---|---|
| CN (1) | CN109458976A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285873A (en) * | 2019-07-17 | 2019-09-27 | 珠海利安达智能科技有限公司 | Foil gauge component and its installation method |
| CN110411746A (en) * | 2019-07-26 | 2019-11-05 | 中国航发沈阳发动机研究所 | A kind of shear pin carrying allocation for test device and test method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2284669A (en) * | 1993-12-07 | 1995-06-14 | Strainstall Engineering Servic | Determination of in situ stress in concrete |
| CN104749032A (en) * | 2015-04-16 | 2015-07-01 | 湖南大学 | Testing device for internal stress of soil-rock mixture or concrete |
| CN104792256A (en) * | 2015-03-30 | 2015-07-22 | 华侨大学 | Device and method for concrete interior strain testing |
| CN108894362A (en) * | 2018-07-23 | 2018-11-27 | 西安理工大学 | Assembled grating type thin-walled steel plate regeneration concrete compound shear wall and assembly method |
-
2018
- 2018-12-27 CN CN201811610258.8A patent/CN109458976A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2284669A (en) * | 1993-12-07 | 1995-06-14 | Strainstall Engineering Servic | Determination of in situ stress in concrete |
| CN104792256A (en) * | 2015-03-30 | 2015-07-22 | 华侨大学 | Device and method for concrete interior strain testing |
| CN104749032A (en) * | 2015-04-16 | 2015-07-01 | 湖南大学 | Testing device for internal stress of soil-rock mixture or concrete |
| CN108894362A (en) * | 2018-07-23 | 2018-11-27 | 西安理工大学 | Assembled grating type thin-walled steel plate regeneration concrete compound shear wall and assembly method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285873A (en) * | 2019-07-17 | 2019-09-27 | 珠海利安达智能科技有限公司 | Foil gauge component and its installation method |
| CN110285873B (en) * | 2019-07-17 | 2024-09-24 | 珠海利安达智能科技有限公司 | Strain gauge assembly and method of installing same |
| CN110411746A (en) * | 2019-07-26 | 2019-11-05 | 中国航发沈阳发动机研究所 | A kind of shear pin carrying allocation for test device and test method |
| CN110411746B (en) * | 2019-07-26 | 2021-03-12 | 中国航发沈阳发动机研究所 | Shear pin bearing distribution testing device and method |
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Application publication date: 20190312 |
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| RJ01 | Rejection of invention patent application after publication |