CN106768624A - Embedded concrete shear stress sensor caliberating device - Google Patents
Embedded concrete shear stress sensor caliberating device Download PDFInfo
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- CN106768624A CN106768624A CN201710111796.1A CN201710111796A CN106768624A CN 106768624 A CN106768624 A CN 106768624A CN 201710111796 A CN201710111796 A CN 201710111796A CN 106768624 A CN106768624 A CN 106768624A
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- shear stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
Abstract
The present invention relates to a kind of embedded concrete shear stress sensor caliberating device for concrete structure dynamic stress measurement, including concrete hollow thin cylinder（1）, steel sole plate（2）, steel top board（3）, bolt（4）, stop sleeve（5）, cantilever girder steel（6）, load test system（7）, sensing device（8）, piezoelectric ceramic piece（9）, shielded conductor（10）, package blocks（11）, joint（12）, signal processing and analysis system（13）, rotary shaft（14）.The present invention applies dynamic load by concrete hollow thin cylinder, equally distributed dynamic shear stress is simulated on thin-walled, by output signal of the collection analysis sensor in the case where different shear stress are acted on, sensor is demarcated, so that the demarcation of sensor more science is accurate, and then measurement to inside concrete shear stress under dynamic load provides reliable technical basis.
Description
Technical field
Sensor technical field belonging to of the invention, more particularly to a kind of insertion for concrete structure dynamic stress measurement
Formula concrete shear stress sensor caliberating device.
Background technology
Used as the maximum construction material of consumption in engineering construction, its stress state is the weight for judging safety of structure to concrete
Want index.The shearing strength of concrete material is low, so the monitoring to concrete structure inside shear stress is extremely important.It is common
Concrete stress monitoring method, is the strain for carrying out measurement surface in concrete structural surface adhering resistance strain sheets, is then passed through
Conversion draws the stress of concrete surface, and cannot directly obtain the stress state of inside concrete, cannot more obtain accurate
Shear stress.The failure by shear of concrete belongs to brittle break, is especially easily sheared under the dynamic load functions such as blast, earthquake
Destruction, it is therefore necessary to which the dynamic shear stress to inside concrete is monitored.Recently as the development of sensor technology,
Apply the method that various sensors are monitored more and more in concrete structure, for the monitoring result more science of sensor
Accurate and feedback result has foundation, it is necessary to which sensor is demarcated, that is, allow stress state residing for sensor be actually consistent,
And the difficult point demarcated to shear stress sensor is, the equally distributed shear stress of life of relatively being had difficult labour on sensing element.In consideration of it,
The present invention provides a kind of embedded concrete shear stress sensor caliberating device to solve the above problems.
The content of the invention
The present invention mainly solves the technical problem existing for prior art：There is provided embedded concrete shear stress sensing
Device caliberating device, thin-walled hollow cylindrical structure is put on by by pure torsion effect, shear stress is formed on thin-walled equally distributed
State so that built-in sensor element surface effect has equally distributed shear stress, it is ensured that the result of demarcation more science is accurate
Really.
The present invention realizes that the technical scheme that its purpose is used is：
Embedded concrete shear stress sensor caliberating device, including concrete hollow thin cylinder（1）, steel sole plate（2）, steel top
Plate（3）, bolt（4）, stop sleeve（5）, cantilever girder steel（6）, load test system（7）, sensing device（8）, signal acquisition point
Analysis system（13）, rotary shaft（14）.
Described concrete hollow thin cylinder（1）Top end face and bottom end face be embedded with bolt（4）, described spiral shell
Bolt（4）It is evenly distributed on the top end face and bottom end face of cylinder.Steel sole plate（2）Pass through bolt with bottom of cylinder（4）It is fixed
Connection, steel top board（3）Pass through bolt with barrel top（4）It is fixedly connected.Described steel sole plate（2）It is fixed as hold-down support
Mode may be selected to be welded to connect in reaction frame.Described rotary shaft（14）One end is weldingly fixed on steel top board（3）Center, axle center
With cylinder（1）Axle center is consistent, it is ensured that rotary shaft（14）With cylinder（1）Around identical axis rotation.Described cantilever girder steel（6）One
End and rotary shaft（14）It is welded and fixed, the other end is used as load test system（7）Loading effect region.Described stop sleeve
（5）For supporting rotary shaft（14）And ensure rotary shaft（14）Can freely be rotated around axle center.
The sensing device（8）Including piezoelectric ceramic piece（9）, shielded conductor（10）, package blocks（11）, joint（12）.The pressure
Electroceramics piece（9）With package blocks（11）Be adhesively fixed is an entirety, the piezoelectric ceramic piece（9）By shielded conductor（10）With
Joint（12）Connection, joint（12）With signal processing and analysis system（13）Connection, i.e. piezoelectric ceramic piece（9）Acted on by shear stress and produced
Raw signal is finally transmitted to signal processing and analysis system（13）.
Described load test system（7）Can acquisition and recording load condition, by cantilever girder steel（6）On be further applied load band
Dynamic rotary shaft（14）Around axis rotation, and then drive concrete hollow thin cylinder（1）Produce moment of torsion.
Described package blocks（11）Uniformly it is embedded in concrete hollow thin cylinder（1）Same cross section on, wherein pressing
Electroceramics piece（9）Electrode surface and cylinder axis perpendicular, it is ensured that electrode surface is only subject to uniform shear stress, multiple identical by analyzing
Sensing device signal under state, reduces error, it is ensured that the science of demarcation is accurate.
The piezoelectric ceramic piece（9）By waterproof insulation process, by epoxy resin and package blocks（11）Be adhesively fixed for
It is overall, the piezoelectric ceramic piece（9）By shielded conductor（10）With joint（12）Connection, the package blocks（11）It is cube
Shape, need to select the material with concrete material with compatibility, and package blocks（11）Stress water of the intensity higher than monitored target
It is flat.
Described concrete hollow thin cylinder（1）External diameter and wall thickness ratio more than 20, according to the mechanics of materials and bullet
Property mechanics principle, if now concrete hollow thin cylinder（1）In pure torsion effect, then the shear stress on thin-walled is to be uniformly distributed
State.
Described steel sole plate（2）Shape can be square or circle, and area need to be more than the outside diameter of cylinder area of a circle, described steel top
Plate（3）It is that diameter and outside diameter of cylinder identical are circular.
Described rotary shaft（14）It is cylinder steel；Described cantilever girder steel（6）It is cuboid steel.
Described sensing device（8）By joint（12）With signal processing and analysis system（13）Connection, i.e. piezoelectric ceramic piece
（9）The signal produced by shear stress effect is finally transmitted to signal processing and analysis system（13）.Preferably, package blocks（11）Can
Selection fiber-reinforced composite cement mortar.
Preferably, stop sleeve（5）With rotary shaft（14）Contact surface need to add lubricant, be hindered with reducing friction during rotation
Power；
Preferably, in cylinder（1）The package blocks set on same cross section（11）Quantity be 4.
The embedded concrete shear stress sensor caliberating device of the present invention is applied to be demarcated to shear stress sensor,
When circular cylinder radius and wall thickness ratio satisfaction are required, dynamic load is applied to cylindrical structure, simulation is uniformly distributed shear stress state, circle
The suffered moment of torsion of cylinder is determined that shear stress suffered by thin-walled is determined by the antitorque coefficient of moment of torsion and section by loading force and eccentric throw.By adopting
Output signal of the set analysis sensor under the effect of different shear stress, demarcates to sensor.
The present invention has the following advantages and effect relative to prior art：
Simple structure of the present invention, it is easy to make, it is with low cost, it is ingenious to have used the mechanics of materials and principle of elasticity, demarcating
Equally distributed shear stress state is formed in apparatus structure, and combines load test system, simulate earthquake, explosion time concrete
The dynamic shear stress state of inside configuration so that the demarcation of sensor more science is accurate, and then to concrete under dynamic load
The measurement of internal shear stress provides reliable technical basis.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples：
Fig. 1 is the overall structure each several part schematic diagram of embedded concrete shear stress sensor caliberating device of the invention.
Fig. 2 is that the concrete hollow thin cylinder of embedded concrete shear stress sensor caliberating device of the invention is illustrated
Figure.
Fig. 3 is the sensing device schematic diagram of embedded concrete shear stress sensor caliberating device of the invention.
Fig. 4 is that the embedding place cross section of sensing device of embedded concrete shear stress sensor caliberating device of the invention is illustrated
Figure.
Fig. 5 is the embodiment schematic diagram of embedded concrete shear stress sensor caliberating device of the invention.
In figure：1-concrete hollow thin cylinder, 2-steel sole plate, 3-steel top board, 4-bolt, 5-stop sleeve,
6-cantilever girder steel, 7-load test system, 8-sensing device, 9-piezoelectric ceramic piece, 10-shielded conductor, 11-encapsulation
Block, 12-joint, 13-signal processing and analysis system, 14-rotary shaft.
Specific embodiment
With reference to embodiment and accompanying drawing, the invention will be further described, but embodiments of the present invention not limited to this.
Embodiment as shown in Figures 1 to 5.The present invention includes concrete hollow thin cylinder（1）, steel sole plate（2）, steel top
Plate（3）, bolt（4）, stop sleeve（5）, cantilever girder steel（6）, load test system（7）, sensing device（8）, signal acquisition point
Analysis system（13）, rotary shaft（14）；Sensing device（8）Including piezoelectric ceramic piece（9）, shielded conductor（10）, package blocks（11）, connect
Head（12）.Described steel sole plate（2）Shape can be square or circle, and area need to be more than the outside diameter of cylinder area of a circle, described steel top
Plate（3）It is that diameter and outside diameter of cylinder identical are circular, steel sole plate（2）Pass through bolt with bottom of cylinder（4）It is fixedly connected, steel top board
（3）Pass through bolt with barrel top（4）It is fixedly connected.Described rotary shaft（14）It is cylinder steel, one end is weldingly fixed on
Steel top board（3）Center, axle center and cylinder（1）Axle center is consistent, it is ensured that rotary shaft（14）With cylinder（1）Turn around identical axle center
It is dynamic.Described cantilever girder steel（6）For cuboid steel, one end and rotary shaft（14）It is welded and fixed, the other end is used as load test
System（7）Loading effect region.Described stop sleeve（5）For supporting rotary shaft（14）And ensure rotary shaft（14）Can be around
Axle center freely rotates.
As shown in Fig. 2 described concrete hollow thin cylinder（1）External diameter and wall thickness ratio more than 20, according to material power
Learn and principle of elasticity, if now concrete hollow thin cylinder（1）In pure torsion effect, then the shear stress on thin-walled is equal
Even distribution, described concrete hollow thin cylinder（1）Top and bottom be embedded with bolt（4）, described bolt（4）
It is evenly distributed on barrel top and bottom.
As shown in figure 3, the sensing device（8）Including piezoelectric ceramic piece（9）, shielded conductor（10）, package blocks（11）, connect
Head（12）.The piezoelectric ceramic piece（9）By waterproof insulation process, by epoxy resin and package blocks（11）It is adhesively fixed as whole
Body, the piezoelectric ceramic piece（9）By shielded conductor（10）With joint（12）Connection, the package blocks（11）For cube shaped,
The material with concrete material with compatibility, and package blocks need to be selected（11）Stress level of the intensity higher than monitored target.
Described sensing device（8）By joint（12）With signal processing and analysis system（13）Connection, i.e. piezoelectric ceramic piece（9）Being cut should
The signal that power effect is produced is finally transmitted to signal processing and analysis system（13）.
As shown in figure 4, described package blocks（11）Uniformly it is embedded in concrete hollow thin cylinder（1）Same cross section
On, wherein piezoelectric ceramic piece（9）Electrode surface and cylinder axis perpendicular, it is ensured that electrode surface is only subject to uniform shear stress, by point
Sensing device signal under the multiple equal states of analysis, reduces error, it is ensured that the science of demarcation is accurate.
As shown in figure 5, described steel sole plate（2）Used as hold-down support, fixed form may be selected to be welded to connect in reaction frame.
Described load test system（7）Can acquisition and recording load condition, by cantilever girder steel（6）On be further applied load axle be rotated
（14）Around axis rotation, and then drive concrete hollow thin cylinder（1）Produce moment of torsion.
The embedded concrete shear stress sensor caliberating device of the present invention is applied to be demarcated to shear stress sensor,
When circular cylinder radius and wall thickness ratio satisfaction are required, dynamic load is applied to cylindrical structure, simulation is uniformly distributed shear stress state, circle
The suffered moment of torsion of cylinder is determined that shear stress suffered by thin-walled is determined by the antitorque coefficient of moment of torsion and section by loading force and eccentric throw.By adopting
Output signal of the set analysis sensor under the effect of different shear stress, demarcates to sensor.
Specific embodiment described in the present invention is only to the spiritual explanation for example of the present invention.Technology belonging to of the invention
The technical staff in field can make various modifications or supplement to described specific embodiment or use similar mode
Substitute, but without departing from spirit of the invention or surmount scope defined in appended claims.
Claims (7)
1. a kind of embedded concrete shear stress sensor caliberating device, it is characterised in that：Including concrete hollow thin cylinder
（1）, steel sole plate（2）, steel top board（3）, bolt（4）, stop sleeve（5）, cantilever girder steel（6）, load test system（7）, sensing
Device（8）, signal processing and analysis system（13）, rotary shaft（14）；
Described concrete hollow thin cylinder（1）Top end face and bottom end face be embedded with bolt（4）, bolt（4）Uniformly
It is distributed on the top end face and bottom end face of cylinder；Steel sole plate（2）With steel top board（3）Pass through with bottom of cylinder and top respectively
Bolt（4）It is fixedly connected；Described steel sole plate（2）As hold-down support, rotary shaft（14）One end be fixed on steel top board（3）'s
Center, axle center and cylinder（1）Axle center is consistent；Described cantilever girder steel（6）One end and rotary shaft（14）It is welded and fixed, the other end is made
It is load test system（7）Loading effect region；Described stop sleeve（5）It is enclosed within rotary shaft（14）On, revolved for supporting
Rotating shaft（14）And ensure rotary shaft（14）Can freely be rotated around axle center；
The sensing device（8）Including piezoelectric ceramic piece（9）, shielded conductor（10）, package blocks（11）, joint（12）；
The piezoelectric ceramic piece（9）With package blocks（11）Be adhesively fixed is an entirety, the piezoelectric ceramic piece（9）By shielding
Wire（10）With joint（12）Connection, joint（12）With signal processing and analysis system（13）Connection, i.e. piezoelectric ceramic piece（9）Cut
The signal that stress is produced is finally transmitted to signal processing and analysis system（13）.
2. embedded concrete shear stress sensor caliberating device according to claim 1, it is characterised in that：Described adds
Carry pilot system（7）Acquisition and recording load condition, by cantilever girder steel（6）On be further applied load axle be rotated（14）Around axle center
Rotate, and then drive concrete hollow thin cylinder（1）Produce moment of torsion.
3. embedded concrete shear stress sensor caliberating device according to claim 1, it is characterised in that：Described envelope
Dress block（11）Uniformly it is embedded in concrete hollow thin cylinder（1）Same cross section on, wherein piezoelectric ceramic piece（9）Electrode
Face and cylinder axis perpendicular.
4. embedded concrete shear stress sensor caliberating device according to claim 1, it is characterised in that：The piezoelectricity
Potsherd（9）By waterproof insulation process, by epoxy resin and package blocks（11）It is entirety to be adhesively fixed；The package blocks
（11）For cube shaped, using the material with concrete material with compatibility, and package blocks（11）Intensity is right higher than monitored
The stress level of elephant.
5. embedded concrete shear stress sensor caliberating device according to claim 1, it is characterised in that：Described is mixed
Solidifying soil hollow thin-wall cylinder（1）External diameter and wall thickness ratio more than 20.
6. embedded concrete shear stress sensor caliberating device according to claim 1, it is characterised in that：Described steel
Base plate（2）Square or circle is shaped as, area is more than the outside diameter of cylinder area of a circle, described steel top board（3）Outside for diameter and cylinder
Footpath identical is circular.
7. embedded concrete shear stress sensor caliberating device according to claim 1, it is characterised in that：
Described rotary shaft（14）It is cylinder steel；Described cantilever girder steel（6）It is cuboid steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710111796.1A CN106768624A (en) | 2017-02-28 | 2017-02-28 | Embedded concrete shear stress sensor caliberating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710111796.1A CN106768624A (en) | 2017-02-28 | 2017-02-28 | Embedded concrete shear stress sensor caliberating device |
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| CN106768624A true CN106768624A (en) | 2017-05-31 |
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| CN201710111796.1A Pending CN106768624A (en) | 2017-02-28 | 2017-02-28 | Embedded concrete shear stress sensor caliberating device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225623A (en) * | 2018-01-17 | 2018-06-29 | 华侨大学 | Concrete shear stress sensor and scaling method based on shearing-type piezoelectric ceramics |
| CN109357795A (en) * | 2018-12-28 | 2019-02-19 | 吉林建筑大学 | A kind of cement base piezoelectric composite material sensor |
| CN109557184A (en) * | 2019-01-15 | 2019-04-02 | 福州大学 | For bridge pier sensor laying and method that stabilization by drainage construction quality monitors |
| CN110411655A (en) * | 2019-08-05 | 2019-11-05 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of rotor blade embeds the caliberating device and its scaling method of micro pressure sensor |
| CN111579355A (en) * | 2020-06-18 | 2020-08-25 | 湖北震泰建设工程质量检测有限责任公司 | Concrete cast-in-place pile static load test unbalance loading monitoring method based on piezoelectric impedance frequency shift |
| CN112097980A (en) * | 2020-09-08 | 2020-12-18 | 清华大学 | Shear force measuring device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225623A (en) * | 2018-01-17 | 2018-06-29 | 华侨大学 | Concrete shear stress sensor and scaling method based on shearing-type piezoelectric ceramics |
| CN109357795A (en) * | 2018-12-28 | 2019-02-19 | 吉林建筑大学 | A kind of cement base piezoelectric composite material sensor |
| CN109357795B (en) * | 2018-12-28 | 2023-09-01 | 吉林建筑大学 | Cement-based piezoelectric composite material sensor |
| CN109557184A (en) * | 2019-01-15 | 2019-04-02 | 福州大学 | For bridge pier sensor laying and method that stabilization by drainage construction quality monitors |
| CN110411655A (en) * | 2019-08-05 | 2019-11-05 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of rotor blade embeds the caliberating device and its scaling method of micro pressure sensor |
| CN111579355A (en) * | 2020-06-18 | 2020-08-25 | 湖北震泰建设工程质量检测有限责任公司 | Concrete cast-in-place pile static load test unbalance loading monitoring method based on piezoelectric impedance frequency shift |
| CN111579355B (en) * | 2020-06-18 | 2023-04-28 | 湖北震泰建设工程质量检测有限责任公司 | Method for monitoring unbalanced load of static load test of bored concrete pile |
| CN112097980A (en) * | 2020-09-08 | 2020-12-18 | 清华大学 | Shear force measuring device |
| CN112097980B (en) * | 2020-09-08 | 2021-05-25 | 清华大学 | Shear force measuring device |
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Application publication date: 20170531 |