CN108801525A - Some stress state detectors of plane and detection method - Google Patents
Some stress state detectors of plane and detection method Download PDFInfo
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- CN108801525A CN108801525A CN201810185919.0A CN201810185919A CN108801525A CN 108801525 A CN108801525 A CN 108801525A CN 201810185919 A CN201810185919 A CN 201810185919A CN 108801525 A CN108801525 A CN 108801525A
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- detector
- cable
- pressure sensor
- plane
- stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0047—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to residual stresses
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- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The present invention provides a kind of some stress state detectors of plane and detection methods, the detector includes pedestal, pressure sensor and cable corresponding with the pressure sensor, the pedestal is triangular prism, first side, second side and the third side of the triangular prism are equipped with the caulking groove for placing the pressure sensor, and the center of the caulking groove is equipped with the cable through-hole to extend internally；The center of the triangular prism is equipped with axial cable through-hole.It the configuration of the present invention is simple and is easily installed, and pedestal is triangular prism shaped, convenient for determining deflection angle, realizes the indirect measurement of some stress states in material internal plane.
Description
Technical field
The present invention relates to a kind of foundation stress measuring instruments, and in particular to a kind of some stress state detectors of plane and inspection
Survey method.
Background technology
With the development of science and technology with the raising of national life level, basement process design and construction are proposed higher and higher
Standard, in order to ensure the quality of ground, country has formulated many specifications about building foundation engineering, answers ground
The indexs such as power, settling amount, compression strength are made that requirement.
Stress test is inside Knowing material and the important means of interface bearer properties, failure mode, such as the pressure of retaining wall
Power problem, stress problem of foundation etc..Stress object in actual environment is usually three dimensional object, and in engineer application often
It carries out analysis object to be reduced to two-dimensional problems, thin plate is such as typically reduced to plane stress problem, by long cavern, earth-retaining
Wall, dam body etc. are reduced to plane strain problems, and the foundation Load Analysis problem with axial symmetry characteristic can also be reduced to put down
Face strain problems.
Currently, still lacking the validity test means for some stress in the loose materials planes such as concrete, Rock And Soil.When
The conventional stress test means in preceding ground field have pressure sensor, reinforcing rib meter and foil gauge etc., and conventional pressure sensor can only
Its pressure-bearing surface mormal stress is measured, and shear stress can not be measured；Reinforcing rib meter is only applicable to measure reinforcing bar axle power；And abnormity strain
Piece (strain rosette) can measure tangent stress in plane, but be only limitted to material surface.
Invention content
A kind of some stress state detectors of plane, the detector include 1 pedestal, 3 pressure sensors and with institute
The corresponding cable of pressure sensor is stated, it is improved in that the pedestal is triangular prism, the first side of the triangular prism,
Second side and third side are equipped with the caulking groove for being placed with the pressure sensor, and the center of the caulking groove, which is equipped with, to extend internally
Cable through-hole；
The center of the triangular prism is equipped with axial cable through-hole, and the axial cable through-hole is communicated with the cable through-hole.
Further, the caulking groove of the first side, second side of the triangular prism and third side is located at the triangular prism
The same horizontal position on, wherein the induction for the pressure sensor placed faces out.
Further, the cable through-hole is located at the same cross section of the triangular prism, and angle to each other is 120 °.
Further, the cable is equipped with O-ring seals, and the corresponding pressure sensor of one end is connected, separately
One end is crossed by the cable through-hole and remaining cable and is drawn in the axial cable through-hole.
A kind of detection method of some stress state detectors of the plane, it is improved in that the detection method
Including：
The detector is disposed vertically inside measurand, make the first side of the detector, second side and
The normal of third side is respectively positioned in the test plane inside measurand；
Read the measured value of the detector first side, second side and the pressure sensor on third side；
Institute is calculated according to the measured value of the pressure sensor on the detector first side, second side and third side
State measurand inner plane tangent stress parameter.
Further, plane tangent stress parameter is calculated as follows：
Wherein, σαFor the measured value of the pressure sensor in the plane tangent stress detector first side；σβ
For the measured value of the pressure sensor in the plane tangent stress detector second side；σγA bit for the plane
Stress state detector third side on pressure sensor measured value；α detects for the plane tangent stress
The deflection angle of instrument first side, β are the deflection angle of the plane tangent stress detector second side, and γ is described flat
The deflection angle of face tangent stress detector third side, lα=sln α, mα=cosm；lβ=sin β, mβ=cos β；lγ
=sln γ, mγ=cos γ；σx、σyAnd σxyFor the measurand inner plane tangent stress parameter.
Beneficial effects of the present invention：
(1) provided by the invention a kind of for plane tangent stress detector, by 3 pressure sensors and 1
Pedestal combines, and realizes the measurement to direct stress on 3 non-coplanar faces two-by-two.The configuration of the present invention is simple, installation
It is easy, and pedestal is triangular prism shaped, accuracy is high, and deflection angle is determined convenient for user, realizes in material internal plane a bit
The indirect measurement of stress state.
(2) a kind of detection method for plane tangent stress detector provided by the invention, due to the present invention
Pedestal be triangular prism shaped, 3 sides are determining angle, therefore deflection of the side with respect to world coordinates need to only be determined
Angle, in addition the deflection angle of 2 sides it can be learnt that；According to Cauchy's direct stress formula, the corresponding direct stress in 3 faces and deflection are substituted into
Angle, you can acquire the stress state of the point.In actual installation process, plumb line, horizon rule and known interface (gear can be passed through
Cob wall surface) etc. for reference to being oriented.
Description of the drawings
Fig. 1 is a kind of some stress state detectors of plane provided by the invention longitudinal direction view, including 1-1# pressure
Sensor, 2-2# pressure sensors, 3-3# pressure sensors, 4-1# cables, 5-2# cables, 6-3# cables, 7- pedestals, 8-1# are embedding
Slot, 9-2# caulking grooves, 10-3# caulking grooves, 11-1# cable through-holes, 12-2# cable through-holes, 13-3# cable through-holes, 14- axial cables are logical
Hole；
Fig. 2 is a kind of some stress state detector A views of plane provided by the invention；
Fig. 3 is a kind of calculating schematic diagram of some stress state detection methods of plane provided by the invention.
Specific implementation mode
It elaborates below in conjunction with the accompanying drawings to the specific implementation mode of the present invention.
A kind of some stress state detectors of plane, the detector include 1 pedestal, 3 pressure sensors and with institute
The corresponding cable of pressure sensor is stated, the pedestal as shown in Figure 1 is triangular prism, first side, the second side of the triangular prism
Face and third side are equipped with the caulking groove for being placed with the pressure sensor, and the center of the caulking groove is equipped with the cable to extend internally
Through-hole；
The center of the triangular prism is equipped with axial cable through-hole, and the axial cable through-hole is communicated with the cable through-hole.
Specifically, the caulking groove of the first side of the triangular prism, second side and third side is located at the triangular prism
In the same horizontal position, wherein the induction for the pressure sensor placed faces out.
Specifically, the cable through-hole is located at the same cross section of the triangular prism, and angle to each other is 120 °.
Specifically, as shown in Fig. 2, the cable is equipped with O-ring seals, the corresponding pressure sensor of one end
It is connected, the other end is crossed by the cable through-hole and remaining cable and drawn in the axial cable through-hole.
A kind of detection method of some stress state detectors of the plane, the detection method include：
The detector is disposed vertically inside measurand, i.e., the normal of pedestal cylinder is located at stress test plane
It is interior；
Read the measured value of the detector first side, second side and the pressure sensor on third side；
Institute is calculated according to the measured value of the pressure sensor on the detector first side, second side and third side
State measurand inner plane tangent stress parameter.
Specifically, plane tangent stress parameter is calculated as follows：
Wherein, σαFor the measured value of the pressure sensor in the plane tangent stress detector first side；σβ
For the measured value of the pressure sensor in the plane tangent stress detector second side；σγA bit for the plane
Stress state detector third side on pressure sensor measured value；As shown in figure 3, α be the plane any answer
The deflection angle of power state detector first side, β are the deflection angle of the plane tangent stress detector second side,
γ is the deflection angle of plane tangent stress detector third side, lα=sin α, mα=cos α；lβ=sin β, mβ
=cos β；lγ=sin γ, mγ=cos γ；σx、σyAnd σxyFor the measurand inner plane tangent stress parameter.
NoteThen work as α, when beta, gamma takes determining numerical value, then K must be solved.Such as
When α=30 °, β=150 °, when γ=270 °, i.e., when the described pedestal is equilateral triangle,
When α=45 °, β=180 °, when γ=270 °, i.e., when the described pedestal is isosceles right triangle,
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Invention is explained in detail with reference to above-described embodiment for pipe, those of ordinary skills in the art should understand that：Still
The specific implementation mode of the present invention can be modified or replaced equivalently, and without departing from any of spirit and scope of the invention
Modification or equivalent replacement should all cover within the claims of the present invention.
Claims (6)
1. a kind of some stress state detectors of plane, the detector include 1 pedestal, 3 pressure sensors and with it is described
The corresponding cable of pressure sensor, which is characterized in that the pedestal is triangular prism, first side, the second side of the triangular prism
Face and third side are equipped with the caulking groove for being placed with the pressure sensor, and the center of the caulking groove is equipped with the cable to extend internally
Through-hole；
The center of the triangular prism is equipped with axial cable through-hole, and the axial cable through-hole is communicated with the cable through-hole.
2. detector as described in claim 1, which is characterized in that first side, second side and the third of the triangular prism
The caulking groove of side is located in the same horizontal position of the triangular prism, wherein the induction for the pressure sensor placed towards
Outside.
3. detector as described in claim 1, which is characterized in that the cable through-hole is located at the same transversal of the triangular prism
Face, and angle to each other is 120 °.
4. detector as described in claim 1, which is characterized in that the cable is equipped with O-ring seals, and one end is corresponding
The pressure sensor be connected, the other end is crossed by the cable through-hole and remaining cable and is drawn in the axial electricity
Cable through-hole.
5. a kind of detection method of some stress state detectors of the plane as described in claim any one of 1-4, which is characterized in that
The detection method includes：
The detector is disposed vertically inside measurand, the first side, second side and third of the detector are made
The normal of side is respectively positioned in the test plane inside measurand；
Read the measured value of the detector first side, second side and the pressure sensor on third side；
The quilt is calculated according to the measured value of the pressure sensor on the detector first side, second side and third side
Survey the test plane tangent stress parameter inside object.
6. method as claimed in claim 5, which is characterized in that test plane tangent stress parameter is calculated as follows：
Wherein, σαFor the measured value of the pressure sensor in the plane tangent stress detector first side；σβFor institute
State the measured value of the pressure sensor in plane tangent stress detector second side；σγFor the plane, any is answered
The measured value of pressure sensor on power state detector third side；α is the plane tangent stress detector the
The deflection angle of one side, β are the deflection angle of the plane tangent stress detector second side, and γ is the plane one
The deflection angle of the stress state detector third side of point, lα=sin α, mα=cos α；lβ=sin β, mβ=cos β；lγ=sin
γ,mγ=cos γ；σx、σyAnd σxyFor the test plane tangent stress parameter inside the measurand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810185919.0A CN108801525A (en) | 2018-03-07 | 2018-03-07 | Some stress state detectors of plane and detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810185919.0A CN108801525A (en) | 2018-03-07 | 2018-03-07 | Some stress state detectors of plane and detection method |
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| Publication Number | Publication Date |
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| CN108801525A true CN108801525A (en) | 2018-11-13 |
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| CN201810185919.0A Pending CN108801525A (en) | 2018-03-07 | 2018-03-07 | Some stress state detectors of plane and detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484894A (en) * | 2020-12-21 | 2021-03-12 | 天津城建大学 | Three-dimensional soil pressure testing device and method based on axial symmetry state |
| CN112484895A (en) * | 2020-12-21 | 2021-03-12 | 天津城建大学 | Three-dimensional stress testing device and method with hexahedral base as outline |
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| US20130291653A1 (en) * | 2012-05-01 | 2013-11-07 | Honeywell International Inc. | Three-axis low profile load cell and sensing beam |
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| US20160185468A1 (en) * | 2014-07-11 | 2016-06-30 | The Boeing Company | Flight test hinge assembly |
| CN106442104A (en) * | 2016-07-28 | 2017-02-22 | 天津城建大学 | Regular dodecahedron-based three-dimensional stress state testing device and operation method |
| CN106525297A (en) * | 2016-10-17 | 2017-03-22 | 天津城建大学 | Mini three dimensional effective stress box and test method of the same |
| CN106840884A (en) * | 2017-03-28 | 2017-06-13 | 天津城建大学 | Soil mass elastic parameter test device and its method of testing |
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2018
- 2018-03-07 CN CN201810185919.0A patent/CN108801525A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278947A (en) * | 2011-04-29 | 2011-12-14 | 大连理工大学 | Packaged FBG (Fiber Bragg Grating) sensor for strain and crack test of bituminous concrete road surface |
| US20130291653A1 (en) * | 2012-05-01 | 2013-11-07 | Honeywell International Inc. | Three-axis low profile load cell and sensing beam |
| US20160185468A1 (en) * | 2014-07-11 | 2016-06-30 | The Boeing Company | Flight test hinge assembly |
| CN104729777A (en) * | 2015-04-01 | 2015-06-24 | 太原理工大学 | Stress test device and method for analog simulation test |
| CN105403330A (en) * | 2015-12-17 | 2016-03-16 | 天津城建大学 | Apparatus for testing three-dimensional stress state inside soil, and test method |
| CN106442104A (en) * | 2016-07-28 | 2017-02-22 | 天津城建大学 | Regular dodecahedron-based three-dimensional stress state testing device and operation method |
| CN106525297A (en) * | 2016-10-17 | 2017-03-22 | 天津城建大学 | Mini three dimensional effective stress box and test method of the same |
| CN106840884A (en) * | 2017-03-28 | 2017-06-13 | 天津城建大学 | Soil mass elastic parameter test device and its method of testing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484894A (en) * | 2020-12-21 | 2021-03-12 | 天津城建大学 | Three-dimensional soil pressure testing device and method based on axial symmetry state |
| CN112484895A (en) * | 2020-12-21 | 2021-03-12 | 天津城建大学 | Three-dimensional stress testing device and method with hexahedral base as outline |
| CN112484895B (en) * | 2020-12-21 | 2023-03-07 | 天津城建大学 | Three-dimensional stress testing device and method with hexahedral base as outline |
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Application publication date: 20181113 |
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