CN204740199U - Can simulate vertical load's horizontal shear test instrument - Google Patents
Can simulate vertical load's horizontal shear test instrument Download PDFInfo
- Publication number
- CN204740199U CN204740199U CN201520318229.XU CN201520318229U CN204740199U CN 204740199 U CN204740199 U CN 204740199U CN 201520318229 U CN201520318229 U CN 201520318229U CN 204740199 U CN204740199 U CN 204740199U
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- cement concrete
- concrete pavement
- vertical load
- test instrument
- shear test
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Abstract
The utility model provides a can simulate vertical load's horizontal shear test instrument, this can simulate vertical load's horizontal shear test instrument of includes fixing device, loading device, measuring equipment and servo mechanism, cement concrete pavement basic unit sets up in fixing device, and the cement concrete pavement surface course sets up the upper surface in cement concrete pavement basic unit, loading device and measuring equipment set up respectively on the cement concrete pavement surface course, servo mechanism links to each other with loading device and measuring equipment respectively. The utility model discloses can reflect vertical compressive stress on the shear surface difference, can embody the size of actual shear surface between the layer again, calculate the parameter for cement concrete pavement structural analysis provides accurate.
Description
Technical field
The utility model belongs to highway and urban road cement concrete pavement technical field, relates to a kind of horizontal shear test instrument, particularly relates to a kind of horizontal shear test instrument of simulating vertical load.
Background technology
In cement concrete pavement structure analysis theories and method for designing, the stress analysis of surface layer and basic unit and calculating are a very important basic research job.
Cement concrete pavement structure analysis be based upon elastic foundation plate theory basis on carry out, the foundation of this theory is assumed to be prerequisite with following 3: 1) concrete slab is uniform thickness elastic body; 2) impact of the vertical compressive strain of concrete slab and shearing strain is ignored; 3) between elastic foundation and concrete slab level to smooth without frictional resistance, vertically continuous.With regard to the 3rd hypothesis, at the pavement usage initial stage, foundation base is combine completely mostly, and along with the prolongation of tenure of use, interlayer is separated gradually, but still there is larger shear stress, if there is phenomenon of coming to nothing in interlayer, and vertical displacement let alone continuous.
In recent years, that uses in road engineering along with Three-dimensional simulation increases, much research has started to consider interlayer frictional resistance problem, about the simulation of cement concrete pavement knot interlayer contact, usually normal direction and tangential springs are set between the node pair of interlayer upper and lower surface of contact, simulate combination degree by regulating spring rigidity, but the spring rate factor mostly is hypothesis, complete smooth time be 0, completely in conjunction with time be 1, part in conjunction with time between 0 ~ 1.
In order to survey interlayer shear rigidity, developing staight scissors both at home and abroad, tiltedly cut, turning round testing equipments such as cutting.But facts have proved, mainly there is two problems in current testing equipment: one is that the isolated test of small-size test piece exists obvious size effect problem, can not react the interlaminar action of wide cut banded structure; Two is the impacts can not considering Normal compressive stress, can not reflect the shear stress difference that shear surface causes because Normal compressive stress is different.Therefore the interlayer shear rigidity obtained cannot reflect the stress on actual road surface, will produce many negative effects for cement concrete pavement structure design.
Utility model content
The purpose of this utility model is to overcome the blindness of shearing rigidity value between cement concrete pavement structure analysis layer in prior art, and then proposes the horizontal shear test instrument that a kind of Exact Design for highway and urban road cement concrete pavement provides the simulated vertical load of parameter.
For achieving the above object, the utility model adopts following technical scheme:
Simulate a horizontal shear test instrument for vertical load, it is characterized in that: described horizontal shear test instrument of simulating vertical load comprises stationary installation, charger, measuring equipment and servomechanism installation; Cement concrete pavement basic unit is arranged in stationary installation, and cement concrete pavement surface is arranged on cement concrete pavement basic unit upper surface; Described charger and measuring equipment are separately positioned on cement concrete pavement surface; Described servomechanism installation is connected with charger and measuring equipment respectively.
As preferably, the charger that the utility model adopts comprises horizontal actuator and vertical actuator; Described vertical actuator is arranged on the upper surface of cement concrete pavement surface and vertically applies vertical load to cement concrete pavement surface; The sidewall that described horizontal actuator is arranged on cement concrete pavement surface drive cement concrete pavement surface to carry out horizontal shift; Described servomechanism installation is connected with horizontal actuator and vertical actuator respectively.
As preferably, the measuring equipment that the utility model adopts comprises force measuring instrument and displacement transducer; Described force measuring instrument is arranged on the upper surface of cement concrete pavement surface; Institute's displacement sensors is arranged on the sidewall of cement concrete pavement surface; Described servomechanism installation is connected with force measuring instrument and displacement transducer respectively.
As preferably, the stationary installation that the utility model adopts comprises reaction frame and lifting jack; One end of described lifting jack only leans against on reaction frame inwall, and the other end only leans against on the sidewall of cement concrete pavement basic unit.
As preferably, the servomechanism installation that the utility model adopts is binary channels MTS servomechanism.
The utility model has the following advantages:
The utility model provides a kind of horizontal shear test instrument of simulating vertical load, this horizontal shear test instrument can simulating vertical load, by binary channels MTS (Material Test System material test system) servo, is divided into stationary installation, charger and measuring equipment.The horizontal shear test instrument can simulating vertical load comprises stationary installation, charger, measuring equipment and servomechanism installation; Cement concrete pavement basic unit is arranged in stationary installation, and cement concrete pavement surface is arranged on cement concrete pavement basic unit upper surface; Charger and measuring equipment are separately positioned on cement concrete pavement surface; Servomechanism installation is connected with charger and measuring equipment respectively.Stationary installation is made up of reaction frame, lifting jack etc., for fixing basic unit.Charger is made up of horizontal actuator and vertical actuator, and horizontal actuator acts on surface layer side for pushing tow, and vertical actuator end vertically acts on facing surface by tire, the effect of simulation compressed stress.Measuring equipment mainly comprises the force measuring instrument and displacement transducer that actuator provides, and can read horizontal thrust, vertical pressure and horizontal shift.
Accompanying drawing explanation
Fig. 1 is structural representation of simulating the horizontal shear test instrument of vertical load provided by the utility model;
Wherein:
1-lifting jack; 2-reaction frame; 3-cement stabilized macadam base; 4-Portland Cement Concrete Surface Course; The vertical actuator of 5-; The horizontal actuator of 6-; 7-displacement transducer.
Embodiment
See Fig. 1, the utility model provide a kind of horizontal shear test instrument of simulating vertical load, by binary channels MTS (Material Test System material test system) servo, be divided into stationary installation, charger and measuring equipment.Stationary installation is made up of, for fixing basic unit reaction frame 2, lifting jack 1 etc.Charger is made up of horizontal actuator 6 and vertical actuator 5, and horizontal actuator 6 acts on Portland Cement Concrete Surface Course 4 side for pushing tow, and vertical actuator 5 end vertically acts on Portland Cement Concrete Surface Course 4 surface by tire, the effect of simulation compressed stress.Measuring equipment mainly comprises the force measuring instrument and displacement transducer 7 that actuator provides, and can read horizontal thrust, vertical pressure and horizontal shift.
Cement stabilized macadam base 3 is arranged in stationary installation, and Portland Cement Concrete Surface Course 4 is arranged on the upper surface of cement stabilized macadam base 3; Charger and measuring equipment are separately positioned on Portland Cement Concrete Surface Course 4; Servomechanism installation is connected with charger and measuring equipment respectively.Charger comprises horizontal actuator and vertical actuator; Vertical actuator is arranged on the upper surface of Portland Cement Concrete Surface Course 4 and vertically applies vertical pressure to Portland Cement Concrete Surface Course 4; The sidewall that horizontal actuator is arranged on Portland Cement Concrete Surface Course 4 drive Portland Cement Concrete Surface Course 4 to carry out horizontal shift; Servomechanism installation is connected with horizontal actuator and vertical actuator respectively.Measuring equipment comprises force measuring instrument and displacement transducer; Force measuring instrument is arranged on the upper surface of Portland Cement Concrete Surface Course 4; Displacement transducer is arranged on the sidewall of Portland Cement Concrete Surface Course 4; Servomechanism installation is connected with force measuring instrument and displacement transducer respectively.Stationary installation comprises reaction frame and lifting jack; One end of lifting jack only leans against on reaction frame inwall, and the other end only leans against on the sidewall of cement concrete pavement basic unit.Basic unit is fixed by lifting jack 1 and reaction frame 2 surrounding, and horizontal actuator 6 acts on Portland Cement Concrete Surface Course 4 side, loads with the speed of 0.06mm/min, and force-displacement curve cut in record.
Claims (5)
1. can simulate a horizontal shear test instrument for vertical load, it is characterized in that: described horizontal shear test instrument of simulating vertical load comprises stationary installation, charger, measuring equipment and servomechanism installation; Cement concrete pavement basic unit is arranged in stationary installation, and cement concrete pavement surface is arranged on cement concrete pavement basic unit upper surface; Described charger and measuring equipment are separately positioned on cement concrete pavement surface; Described servomechanism installation is connected with charger and measuring equipment respectively.
2. horizontal shear test instrument of simulating vertical load according to claim 1, is characterized in that: described charger comprises horizontal actuator and vertical actuator; Described vertical actuator is arranged on the upper surface of cement concrete pavement surface and vertically applies vertical load to cement concrete pavement surface; The sidewall that described horizontal actuator is arranged on cement concrete pavement surface drive cement concrete pavement surface to carry out horizontal shift; Described servomechanism installation is connected with horizontal actuator and vertical actuator respectively.
3. horizontal shear test instrument of simulating vertical load according to claim 2, is characterized in that: described measuring equipment comprises force measuring instrument and displacement transducer; Described force measuring instrument is arranged on the upper surface of cement concrete pavement surface; Institute's displacement sensors is arranged on the sidewall of cement concrete pavement surface; Described servomechanism installation is connected with force measuring instrument and displacement transducer respectively.
4. horizontal shear test instrument of simulating vertical load according to claim 3, is characterized in that: described stationary installation comprises reaction frame and lifting jack; One end of described lifting jack only leans against on reaction frame inwall, and the other end only leans against on the sidewall of cement concrete pavement basic unit.
5. horizontal shear test instrument of simulating vertical load according to claim 4, is characterized in that: described servomechanism installation is binary channels MTS servomechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520318229.XU CN204740199U (en) | 2015-05-15 | 2015-05-15 | Can simulate vertical load's horizontal shear test instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520318229.XU CN204740199U (en) | 2015-05-15 | 2015-05-15 | Can simulate vertical load's horizontal shear test instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204740199U true CN204740199U (en) | 2015-11-04 |
Family
ID=54421930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520318229.XU Expired - Fee Related CN204740199U (en) | 2015-05-15 | 2015-05-15 | Can simulate vertical load's horizontal shear test instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204740199U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849210A (en) * | 2015-05-15 | 2015-08-19 | 山西省交通科学研究院 | Method for determining interlayer equivalent shear stiffness between base layer and surface layer of cement concrete pavement and horizontal shear tester |
| CN110220702A (en) * | 2019-07-23 | 2019-09-10 | 北京华横科技有限公司 | Class elastic foundation beam type internal force self-balancing jack static test bed |
-
2015
- 2015-05-15 CN CN201520318229.XU patent/CN204740199U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849210A (en) * | 2015-05-15 | 2015-08-19 | 山西省交通科学研究院 | Method for determining interlayer equivalent shear stiffness between base layer and surface layer of cement concrete pavement and horizontal shear tester |
| CN110220702A (en) * | 2019-07-23 | 2019-09-10 | 北京华横科技有限公司 | Class elastic foundation beam type internal force self-balancing jack static test bed |
| CN110220702B (en) * | 2019-07-23 | 2024-04-16 | 北京华横科技有限公司 | Elastic foundation beam type internal force self-balancing jack static load test bed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151104 Termination date: 20190515 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |