CN201974358U - Clamp used for testing pavement interlayer shear fatigue test piece - Google Patents
Clamp used for testing pavement interlayer shear fatigue test piece Download PDFInfo
- Publication number
- CN201974358U CN201974358U CN 201020690749 CN201020690749U CN201974358U CN 201974358 U CN201974358 U CN 201974358U CN 201020690749 CN201020690749 CN 201020690749 CN 201020690749 U CN201020690749 U CN 201020690749U CN 201974358 U CN201974358 U CN 201974358U
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- China
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- clamp assembly
- test piece
- shear fatigue
- lower clamp
- fatigue test
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- Expired - Lifetime
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a clamp used for testing a pavement interlayer shear fatigue test piece. No research covers the interlayer shear fatigue of the pavement structure at home and abroad at present. The utility model provides a clamp used for testing a pavement interlayer shear fatigue test piece. The clamp used for testing the pavement interlayer shear fatigue test piece comprises an upper clamp assembly and a lower clamp assembly, wherein both the upper clamp assembly and the lower clamp assembly are special-shaped blocks with L-shaped longitudinal sections; each special-shaped block is spliced by two identical parts; the upper clamp assembly and the lower clamp assembly are buckled and connected; and a through groove is arranged in the middle of a horizontal buckling part respectively. Through the adoption of the structure, the left and the right ends of the test piece are fixed through the upper clamp assembly and the lower clamp assembly, a bonding layer at the middle part of the test piece is positioned at a through groove joint part of the two clamps; when a vertical wave form load parallel to the bonding layer in the middle of the test piece is exerted, the relationship between the shear stress (strain) and the experimental loading time can be obtained, thereby obtaining the fatigue shear characteristic parameter of the test piece.
Description
Technical field
The utility model belongs to the pavement engineering equipment technical field, relates to the shear fatigue test device of a kind of road surface structare layer under course under cyclic loading, specifically is a kind of anchor clamps that are used to test shear fatigue test specimen between supercrust.
Background technology
Pavement structure is a kind of MULTILAYER COMPOSITE system that is combined by different materials, because materials variances makes the distortion between the different structure layer can't reach the coordination of making peace, therefore generally require spreading sticking layer oil and priming oil between structural sheet, the purpose of wishing to reach in conjunction with measure the compatibility of deformation of different structure layer by this interlayer.Under the driving load action, bigger shear stress and strain appear in pavement structure inside especially interlayer binding site easily, shear stress repeatedly and strain cause the interlaminar bonding layer owing to shear fatigue ruptures, delamination appears in road surface structare layer thereupon, then diseases such as crack, hole groove, passing even basic unit's damage occur, have a strong impact on the normal usability and the serviceable life on road surface.
At present both at home and abroad still nobody studies for the interlayer shear fatigue of pavement structure, also nobody relates to and for the shear fatigue test of structural sheet interlayer, industry standard does not have concrete regulation for interlayer shear fatigue yet simultaneously, thereby cause present road structure design to use grave fault with reality, be that pavement structure is not in complete continuous state in actual use always, so how can effectively characterize pavement structure interlayer shear fatigue characteristic is that the assurance road surface can normally be used and the problem of needs solution.
The utility model content
The purpose of this utility model provides a kind of anchor clamps that are used to test shear fatigue test specimen between supercrust, these anchor clamps can reflect the shear fatigue situation of pavement structure interlayer easy, fast in process of the test, what help testing normally carries out, and can reflect the long-term usability of layer structure internal bond material simultaneously accurately.
For achieving the above object, the technical solution adopted in the utility model is: a kind of anchor clamps that are used to test shear fatigue test specimen between supercrust comprise clamp assembly and lower clamp assembly, described upward clamp assembly and lower clamp assembly are the special-shaped block that the longitudinal cross-section is the L type, each special-shaped block is by identical two parts and connect and form, last clamp assembly is interlocked with the lower clamp assembly and is connected, and is respectively arranged with groove in the centre of horizontal snapping portion.
The horizontal folded face of above-mentioned cylinder is a rectangular parallelepiped,
Above-mentioned groove is a square groove.
Each cylinder bottom of above-mentioned lower clamp assembly is provided with base.
This kind structure that the utility model adopts, by clamp assembly up and down two ends, the test specimen left and right sides are fixed, the tack coat at test specimen middle part is positioned at the groove joint portion of two anchor clamps, apply the vertical waveform load parallel with the test specimen intermediate adhesive layer, can obtain the relation between shear stress (strain) and the experiment loading number of times, the fatigue that obtains test specimen is sheared characteristic parameter.
Description of drawings
Fig. 1 is the utility model user mode figure.
Fig. 2 is a clamp assembly structural representation on the utility model.
Fig. 3 is the utility model lower clamp modular construction synoptic diagram.
Fig. 4 is the stressed synoptic diagram of the utility model.
Among the figure, the last clamp assembly of 1-, 2-lower clamp assembly, 3-groove, 4-base, 5-screw, 6-cylinder, 7-through hole.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
Referring to Fig. 1, Fig. 2, Fig. 3, a kind of anchor clamps that are used to test shear fatigue test specimen between supercrust, comprise clamp assembly 1 and lower clamp assembly 2, described upward clamp assembly 1 and lower clamp assembly 2 are the special-shaped block that the longitudinal cross-section is the L type, each special-shaped block is by identical two parts and connect and form, last clamp assembly 1 is interlocked with lower clamp assembly 2 and is connected, and being respectively arranged with 3 stacked of the relative connections of groove 3, two grooves in the centre of horizontal snapping portion is square through hole 7.The vertical folded face of described cylinder is " L " shape, and the horizontal folded face of cylinder is a rectangular parallelepiped.Simultaneously be provided with base 4 in each cylinder 6 bottom of lower clamp assembly.
As shown in Figure 4, when the utility model uses, to go up clamp assembly 1 and lower clamp assembly 2 places up and down, fixing then when guaranteeing to load test specimen do not take place laterally to move, through hole 7 in the utilization on clamp assembly 1 and the lower clamp assembly 2 will be fixed on the other end of test specimen of shearing patrix and clamp, make to shear patrix and shear counterdie to form an integral body, prevent that anchor clamps and test specimen take place laterally to move in the loading procedure.Lower clamp assembly 2 on MTS, prevents that whole anchor clamps take place laterally to move in loading procedure by the screw retention on the base 4.Fixedly in the process of test specimen, the interface that must guarantee shear fatigue test surfaces and last lower clamp point-blank.After whole process is ready, utilizes MTS to apply vertical waveform load and can carry out shear fatigue test on shearing patrix top.
Simultaneously, the utility model is stuck in test specimen by last clamp assembly 1 and lower clamp 2 assemblies and shears in the anchor clamps, shear surface and last lower clamp junction point-blank, and with loading direction always.
Claims (3)
1. anchor clamps that are used to test shear fatigue test specimen between supercrust, it is characterized in that: comprise clamp assembly (1) and lower clamp assembly (2), described upward clamp assembly (1) and lower clamp assembly (2) are the special-shaped block that the longitudinal cross-section is the L type, each special-shaped block is by identical two parts and connect and form, last clamp assembly (1) is interlocked with lower clamp assembly (2) and is connected, and is respectively arranged with groove (3) in the centre of horizontal snapping portion.
2. a kind of anchor clamps that are used to test shear fatigue test specimen between supercrust according to claim 1 is characterized in that: the horizontal folded face of described cylinder (6) is a rectangular parallelepiped,
A kind of anchor clamps that are used to test shear fatigue test specimen between supercrust according to claim 1 is characterized in that: described groove (3) is a square groove.
3. a kind of anchor clamps that are used to test shear fatigue test specimen between supercrust according to claim 1 is characterized in that: each cylinder (6) bottom of described lower clamp assembly (2) is provided with base (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020690749 CN201974358U (en) | 2010-12-30 | 2010-12-30 | Clamp used for testing pavement interlayer shear fatigue test piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020690749 CN201974358U (en) | 2010-12-30 | 2010-12-30 | Clamp used for testing pavement interlayer shear fatigue test piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201974358U true CN201974358U (en) | 2011-09-14 |
Family
ID=44579459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020690749 Expired - Lifetime CN201974358U (en) | 2010-12-30 | 2010-12-30 | Clamp used for testing pavement interlayer shear fatigue test piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201974358U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095680A (en) * | 2010-12-30 | 2011-06-15 | 中交第一公路勘察设计研究院有限公司 | Clamp and method for testing pavement interlayer shear fatigue test piece |
| CN103698229A (en) * | 2013-12-04 | 2014-04-02 | 长安大学 | Testing device for anti-fatigue shear performance between bonding layers of asphalt pavement and testing method thereof |
| CN107024384A (en) * | 2017-04-12 | 2017-08-08 | 哈尔滨汽轮机厂有限责任公司 | A kind of method that shearing experiment detects weld seam shear strength between cellular band and seal with honeycomb seal experimental piece and with it |
| CN112730045A (en) * | 2020-12-21 | 2021-04-30 | 中南大学 | Shearing clamp and application method thereof |
-
2010
- 2010-12-30 CN CN 201020690749 patent/CN201974358U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095680A (en) * | 2010-12-30 | 2011-06-15 | 中交第一公路勘察设计研究院有限公司 | Clamp and method for testing pavement interlayer shear fatigue test piece |
| CN103698229A (en) * | 2013-12-04 | 2014-04-02 | 长安大学 | Testing device for anti-fatigue shear performance between bonding layers of asphalt pavement and testing method thereof |
| CN107024384A (en) * | 2017-04-12 | 2017-08-08 | 哈尔滨汽轮机厂有限责任公司 | A kind of method that shearing experiment detects weld seam shear strength between cellular band and seal with honeycomb seal experimental piece and with it |
| CN112730045A (en) * | 2020-12-21 | 2021-04-30 | 中南大学 | Shearing clamp and application method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110914 |
|
| CX01 | Expiry of patent term |