CN209014385U - Analysis of Concrete Tensile test fixture - Google Patents
Analysis of Concrete Tensile test fixture Download PDFInfo
- Publication number
- CN209014385U CN209014385U CN201821743358.3U CN201821743358U CN209014385U CN 209014385 U CN209014385 U CN 209014385U CN 201821743358 U CN201821743358 U CN 201821743358U CN 209014385 U CN209014385 U CN 209014385U
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- fixture
- head plate
- upper head
- analysis
- epipleural
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Abstract
The utility model discloses a kind of Analysis of Concrete Tensile test fixture, including opposite equipped with opening and the identical upper fixture of structure and lower fixture, upper fixture includes upper head plate, it is connected to two piece of first epipleural of upper head plate two sides, and the second epipleural with the first side plate integrally connected, two piece of first epipleural is biased to the inside of upper head plate and is formed with upper head plate on the test specimen of trapezoidal shape be clamped area, upper fixture is equipped with the first locking hole and tie down screw, and fixture nut matched with tie down screw, Anti-slip nut is additionally provided on the outside of fixture nut, the lateral surface of upper head plate and bottom plate is also equipped with the guide hole for avoiding drawing process from making upper connecting rod and lower pull rod off-axis.Analysis of Concrete Tensile test fixture provided by the utility model can be directly sleeved on the both ends of concrete sample, it is convenient for mounting and clamping, structure is simple and firm grip can be such that the practical direction for bearing drawing force of test specimen is overlapped well with the geometry axial line of test specimen, improves the accuracy of agent on crack resistance of concrete tensile strength test test data.
Description
Technical field
The utility model relates to concrete axial tensile strength index test clamp arts, and in particular to a kind of coagulation
Native tensile test fixture.
Background technique
In concrete material stretch-proof experiment, difficulty essentially consists in the clamping of test specimen, can be by " concrete for hydraulic structure is tested
Regulation " (DL T5150-2001) standard production standard specimen, its basic structure shape is: both ends are in symmetric trapezium shape, middle part
For the elongated rod of the just cubic tee section of 100 × 100mm, when making test specimen, it is also necessary to pre-buried in both ends end face center position
Pull ring or bonding pulling plate can just be installed on the operation for carrying out drawing test in pole on tension testing machine as stretching forced position point.It presses
It when aforesaid way makes test specimen, there are many drawbacks during molding and installation, is mainly shown as: 1. production test specimen expenses
It is troublesome in poeration when expenses of labour；2. the pulling plate and pre-buried pull ring of bonding are difficult to recycle reuse, waste of material loss is big；3. test
Installation operation holding time is long, test efficiency is low, costly；4. measurement result is affected by extraneous factors, cause
The accuracy of test data reduces.When using pulling plate mode is bonded, the bonding location and bonding tightness of pulling plate are just to tension
The measured result of test has larger impact, when especially with pre-buried pull ring mode, due in bonding pulling plate or pre-buried pull ring
In molding, installation and the test links such as practical operation, it is difficult to make the several of the direction of the practical receiving drawing force of test specimen and test specimen
What axial line is completely coincident, and pre-buried position, pre-buried depth and the firmness of both ends pull ring but will directly affect the reality of tensile test
Test data accuracy.Load action line should be made to be overlapped with tension test specimen axis as far as possible in tensile test, and guarantee that test specimen is broken
It is bad to occur as far as possible in tensile region, and existing concrete material tensile test fixture clamps inconvenience etc. in the presence of structure is complicated
Problem is unable to satisfy above-mentioned requirements.
Utility model content
It is convenient that the purpose of this utility model is to provide a kind of clampings, and structure can simply make the practical receiving stretching action of test specimen
The Analysis of Concrete Tensile test clamp that the direction of power and the geometry axial line of test specimen are completely coincident is to solve deficiency in the prior art.
For this purpose, the utility model uses following technical scheme:
A kind of Analysis of Concrete Tensile test fixture, including the opposite upper fixture for being equipped with opening and lower fixture, the upper fixture packet
Include upper head plate, respectively with two piece of first epipleural of upper head plate two sides integrally connected, and with first epipleural one
Second epipleural of body connection, two first epipleurals are biased to the inside of the upper head plate and are formed with the upper head plate
Area is clamped on the test specimen of trapezoidal shape；The lower fixture include bottom plate, respectively with bottom plate two sides integrally connected two
The first lower side panel of block, and the second lower side panel with the first lower side panel integrally connected, two first lower side panels are inclined
To the bottom plate inside and formed with the bottom plate under the test specimen of trapezoidal shape and be clamped area, the upper head plate and it is described under
The center of end plate is respectively equipped with location hole, passes through the location hole and is equipped with upper connecting rod and lower pull rod, second epipleural and institute
It states the second lower side panel two sides and is respectively equipped with the first locking hole, and pass through first locking hole and the upper head plate and described
The parallel tie down screw of bottom plate, the tie down screw both ends are arranged with fixture nut matched with the tie down screw respectively,
The angle and first lower side panel of first epipleural and the upper head plate and the angle of the bottom plate be 45 °~
60°。
In above-mentioned technical proposal, the upper clamping area of upper fixture and the lower clamping area of lower fixture are directly sleeved on concrete examination respectively
Part both ends, clamping are convenient；Tie down screw passes through the first locking hole makes two the second epipleurals and two the second lower side panels respectively
Opening locking, and the angle and the first lower side panel of the first epipleural and upper head plate and the angle of bottom plate are 45 °~60 °
In, the both ends of concrete sample can be made not produce relative sliding with upper fixture or lower folder in tensile test, firmly blocked
In upper clamping area and lower clamping area, the accuracy of tension test data ensure that；The angle of first epipleural and upper head plate with
And first lower side panel and bottom plate the excessive pulling force that will affect fixture and be applied on concrete sample of angle, angle it is too small not side
Just to the clamping of concrete sample.
Further, two second epipleurals are parallel to each other and vertical with the upper head plate, and two described second
Lower side panel is parallel to each other and vertical with the bottom plate.Tie down screw is passed through into two the second epipleurals or two the as a result,
When the first locking hole on two lower side panels, since two the second epipleurals or two the second lower side panels are parallel, fixture nuts
Can be tightly attached to the second epipleural or the second lower side panel surface make two the second epipleurals and two the second lower side panels where
Opening fixation is stronger.
Further, the second locking hole is equipped in the middle part of first epipleural and first lower side panel two sides.
Thus, it is possible to which being also locked to the on both sides of the middle in upper clamping area and lower clamping area provides again concrete sample a folder
Holding force further avoids concrete sample and generates relative movement in drawing process and upper fixture or lower fixture and influence experiment knot
The accuracy of fruit.
Further, Anti-slip nut is additionally provided on the outside of the fixture nut.Anti-slip nut is located at fixture nut and on the outside may be used
To prevent fixture nut to be displaced outwardly the accuracy that ensure that test data since stress is larger in tension test.
Further, the lateral surface of the location hole is equipped with the guide hole equal with the positioning bore dia, the guide hole
Length is the 1/4~1/2 of the upper connecting rod or lower rod length.As a result, upper connecting rod or lower pull rod pass through the other end of guide hole with
Tensile testing machine is connected, and guide hole makes upper connecting rod or lower pull rod be not easy to deviate, and remains at axial location, the length of guide hole
It spends the short guiding to upper connecting rod or lower pull rod and positioning action is unobvious, the length of guide hole is too long to be unfavorable for fixture processing and right
The clamping of concrete sample.
Further, one end that the upper connecting rod is located at the upper clamping area is equipped with limit cylinder, the limit cylinder
Diameter is greater than the diameter of the location hole.As a result, when stretching, the pulling force that cylinder applies puller system as fulcrum force is limited
Concrete sample is passed to by upper connecting rod and lower pull rod.
Further, the location hole successively includes limit hole and guide hole, the limit by the upper head plate Inside To Outside
The diameter in position hole is greater than the diameter of the guide hole and matches with the limit cylinder, and the guide hole is concordant or protrudes from described
The lateral surface of end plate.As a result, when stretching, the limit cylinder as fulcrum force is caught in limit hole flat with the inside of upper head plate
More convenient when making clamping concrete sample together, the pulling force that can also make upper connecting rod pass to concrete sample is more stable and balanced,
In addition guide hole acts on the axis location of upper connecting rod, make the geometry axle center in the test specimen practical direction for bearing drawing force and test specimen
Line can be preferably overlapped.
Further, the upper connecting rod and lower pull rod are located at the upper clamping area and the end face in the lower clamping area and set respectively
There is centering circular hole.The both ends of concrete sample are packed into upper clamping area and lower clamping Qu Shirang concrete sample two respectively as a result,
Centering label on end face is respectively aligned to the centering circular hole of upper connecting rod and lower pull rod to guarantee load action during tension test
Line is overlapped with concrete sample axis.
Further, the upper fixture and the lower fixture are carbon steel material.Carbon steel material makes the intensity of fixture as a result,
It is entirely capable of reaching test requirements document, is not easy in tension test to deform influence test result because stress is excessive.
Analysis of Concrete Tensile test fixture provided by the utility model, has the advantages that
1, opposite face is equipped with the upper fixture of opening and lower fixture can be directly sleeved on the both ends of concrete sample, then by upper folder
Tool and lower fixture on fixture nut and tie down screw locking complete test specimen clamping, it is convenient for mounting and clamping, fixture it can be used repeatedly drop
Low experimental cost；
2, lead to and Anti-slip nut is set outside fixture nut, drawing upper connecting rod and lower pull rod in the lateral surface setting of location hole
Journey is extended through without departing from the guide hole of axis, and in upper connecting rod and the setting of lower pull rod for considering in the various aspects such as middle circular hole
It is overlapped the practical direction for bearing drawing force of test specimen with the geometry axial line of concrete sample, it is accurate to improve test result
Property.
Detailed description of the invention
It, below will be in the utility model embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Required attached drawing is briefly described.It should be evident that drawings described below is only the one of the utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of schematic perspective view of embodiment of the utility model Analysis of Concrete Tensile test fixture；
Fig. 2 is the schematic perspective view of the utility model Analysis of Concrete Tensile test fixture another embodiment；
In figure:
1, centering circular hole；2, upper fixture；21, upper head plate；22, the first epipleural；23, the second epipleural；24, upper clamping
Area；25, upper connecting rod；3, lower fixture；31, bottom plate；32, the first lower side panel；33, the second lower side panel；34, lower clamping area；35, under
Pull rod；4, location hole；5, the first locking hole；6, tie down screw；7, fixture nut；8, the second locking hole；9, guide hole；10, it limits
Cylinder；11, Anti-slip nut.
Specific embodiment
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
Wherein, the drawings are for illustrative purposes only and are merely schematic diagrams, rather than pictorial diagram, should not be understood as to this
The limitation of patent；In order to better illustrate the utility model embodiment, the certain components of attached drawing have omission, zoom in or out,
The size of actual product is not represented；It will be understood by those skilled in the art that certain known features and its explanation may save in attached drawing
Slightly it will be understood by.
The same or similar label correspond to the same or similar components in the attached drawing of the utility model embodiment；It is practical at this
In novel description, it is to be understood that if there is the orientation of the instructions such as term " on ", "lower", "left", "right", "inner", "outside"
Or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model and simplification is retouched
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore the terms describing the positional relationship in the drawings are only for illustration, should not be understood as the limitation to this patent, for this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term can be understood as the case may be.
As depicted in figs. 1 and 2, a kind of Analysis of Concrete Tensile test fixture, including the opposite upper fixture 2 for being equipped with opening and lower folder
Tool 3；Upper fixture 2 is identical with the structure of lower fixture 3, upper fixture 2 include upper head plate 21, respectively with 21 two sides of upper head plate one
Two piece of first epipleural 22 of connection, and the second epipleural 23 with 22 integrally connected of the first epipleural, two first upsides
Plate 22 is biased to the inside of upper head plate 21 and forms clamping area 24 on the test specimen of trapezoidal shape with upper head plate 21；Lower fixture 3 includes
Bottom plate 31, respectively two piece of first lower side panel 32 with 31 two sides integrally connected of bottom plate, and integrally with the first lower side panel 32
Second lower side panel 33 of connection, two the first lower side panels 32 are biased to the inside of bottom plate 31 and are formed with bottom plate 31 trapezoidal
Area 34 is clamped under the test specimen of shape；The center of upper head plate 21 and bottom plate 31 is respectively equipped with location hole 4, passes through location hole 4 equipped with upper
Pull rod 25 and lower pull rod 35, the second epipleural 23 and 33 two sides of the second lower side panel are respectively equipped with the first locking hole 5, and pass through
First locking hole 5 tie down screw 6 parallel with upper head plate 21 and bottom plate 31,6 both ends of tie down screw are arranged with and lock respectively
The matched fixture nut 7 of screw rod 6, the first epipleural 22 and the angle of upper head plate 21 and the first lower side panel 32 and bottom plate 31
Angle is 45 °~60 °.
Wherein, two the second epipleurals 23 are parallel to each other and vertical with upper head plate 21, and two the second lower side panels 33 are mutually
It is in parallel and vertical with bottom plate 31.During making test, concrete sample and upper fixture 2 and the clamping of lower fixture 3 are tighter,
First epipleural 22 and the first lower side panel are equipped with the second locking hole 8 in the middle part of 32 two sides, tie down screw 6 can be inserted into the
Two locking holes 8 are firmly locked the middle part of 32 two sides of the first epipleural 22 and the first lower side panel.
In addition, being additionally provided with Anti-slip nut 11 on the outside of fixture nut 7 to prevent tension test in the process because of the big fixture nut 7 of stress
Outside Slideslip.
Wherein, in order to make upper connecting rod 25 and lower pull rod 35 during the tensile test stress without departing from axis, location hole 4
Lateral surface be equipped with the guide hole 9 equal with 4 diameter of location hole, the length of guide hole 9 is the 1/ of 35 length of upper connecting rod 25 or lower pull rod
4, can also according to actual needs by the length of guide hole 9 be 35 length of upper connecting rod 25 or lower pull rod 1/4~1/2 between remove 1/4
Outer other numerical value.
In addition, one end that upper connecting rod 25 is located at upper clamping area 24 is equipped with limit cylinder 10, the diameter of limit cylinder 10 is greater than
The diameter of location hole 4.Equally, one end that lower pull rod 35 is located at lower clamping area 34 also is provided with limit cylinder 10.
Wherein, upper connecting rod 25 and lower pull rod 35 are located at upper clamping area 24 and the lower end face for being clamped area 34 and are respectively equipped with centering and justify
Hole 1.In addition, upper fixture 2 and lower fixture 3 are carbon steel material.
In another embodiment of the utility model, as shown in Fig. 2, location hole 4 is successively wrapped by 21 Inside To Outside of upper head plate
Limit hole and (not shown) guide hole 9 are included, the diameter of limit hole is greater than the diameter of guide hole 9 and matches with limit cylinder 10,
Limit cylinder 10 can be fastened on the inside of upper head plate 21 and be lower than or the concordant medial surface with upper head plate 21 in this way, real with upper one
It applies the limit cylinder 10 in example and protrudes from the medial surface of upper head plate 21 and compare, the end face of concrete sample can when can make tension test
Make to clamp stronger to be close to the inside of upper head plate 21, guide hole 9 flushes in the lateral surface of upper head plate 21, and guide hole 9 can also protrude
In the lateral surface of upper head plate 21, the length of guide hole 9 is the 1/4 of 35 length of upper connecting rod 25 or lower pull rod, can also be according to practical need
By the length of guide hole 9 is 35 length of upper connecting rod 25 or lower pull rod between 1/4~1/2 other numerical value in addition to 1/4.
When using Analysis of Concrete Tensile test fixture provided by the utility model, upper connecting rod 25 and lower pull rod 35 are distinguished first
It is inserted into upper head plate 21 and bottom plate 31 respectively from corresponding location hole 4 and guide hole 9, and limit cylinder 10 is made to be stuck in limit hole
In, the upper clamping area 24 and lower clamping area 34 of upper fixture 2 and lower fixture 3 are then inserted in the two of the concrete sample made respectively
End makes that the centering in concrete sample both ends of the surface is allowed to mark the centering circular hole 1 for being respectively aligned to upper connecting rod 25 and lower pull rod 35, coagulation
Native test specimen includes the clamping portion and intermediate tension portion at both ends, and whole is in dumbbell shaped, and axis bears in cuboid in intermediate tension portion
The sectional dimension of heart load, cuboid is 100mm × 100mm, length 100mm-300mm, and tie down screw 6 is inserted into respectively
The first locking hole 5 and the second locking hole 8 of fixture 2 and lower fixture 3, successively tightening fixture nut 7 and Anti-slip nut 11 makes folder
The opening of tool 2 and lower fixture 3 is firmly fastened togather with concrete sample with middle part, then by upper connecting rod 25 and lower pull rod 35
It is separately connected to be fixed on cupping machine and starts tension test.
It is to be understood that above-mentioned specific embodiment is only the preferred embodiment and institute's application technology original of the utility model
Reason, in technical scope disclosed in the utility model, change that anyone skilled in the art is readily apparent that
Change or replace, should all cover within the protection scope of the present utility model.
Claims (9)
1. a kind of Analysis of Concrete Tensile test fixture, which is characterized in that including it is opposite be equipped with opening and the identical upper fixture of structure and
Lower fixture；
The upper fixture include upper head plate, respectively with two piece of first epipleural of upper head plate two sides integrally connected, Yi Jiyu
Second epipleural of the first epipleural integrally connected, two first epipleurals be biased to the inside of the upper head plate and
It is formed with the upper head plate on the test specimen of trapezoidal shape and is clamped area；
The lower fixture include bottom plate, respectively with two piece of first lower side panel of bottom plate two sides integrally connected, Yi Jiyu
Second lower side panel of the first lower side panel integrally connected, two first lower side panels be biased to the inside of the bottom plate and
It is formed with the bottom plate under the test specimen of trapezoidal shape and is clamped area；
The center of the upper head plate and the bottom plate is respectively equipped with location hole, passes through the location hole and is equipped with upper connecting rod and drop-down
Bar, second epipleural and second lower side panel two sides are respectively equipped with the first locking hole, and pass through first lock
The tieholen tie down screw parallel with the upper head plate and the bottom plate, the tie down screw both ends are arranged with and the lock respectively
The tight matched fixture nut of screw rod, the angle and first lower side panel of first epipleural and the upper head plate with it is described
The angle of bottom plate is 45 ° -60 °.
2. Analysis of Concrete Tensile test fixture according to claim 1, which is characterized in that two second epipleurals are mutual
In parallel and vertical with the upper head plate, two second lower side panels are parallel to each other and vertical with the bottom plate.
3. Analysis of Concrete Tensile test fixture according to claim 1, which is characterized in that first epipleural and described
The second locking hole is equipped in the middle part of one lower side panel two sides.
4. Analysis of Concrete Tensile test fixture according to claim 1, which is characterized in that be additionally provided on the outside of the fixture nut
Anti-slip nut.
5. Analysis of Concrete Tensile test fixture according to claim 1, which is characterized in that the lateral surface of the location hole is equipped with
The guide hole equal with the positioning bore dia, the length of the guide hole are the 1/4~1/2 of the upper connecting rod or lower rod length.
6. Analysis of Concrete Tensile test fixture according to claim 1, which is characterized in that the upper connecting rod is located at the upper card
The one end for meeting area is equipped with limit cylinder, and the diameter of the limit cylinder is greater than the diameter of the location hole.
7. Analysis of Concrete Tensile test fixture according to claim 6, which is characterized in that the location hole is by the upper head plate
Inside To Outside successively includes limit hole and guide hole, the diameter of the limit hole be greater than the diameter of the guide hole and with the limit
Cylinder matches, and the guide hole is concordant or protrudes from the lateral surface of the upper head plate.
8. Analysis of Concrete Tensile test fixture according to claim 1, which is characterized in that the upper connecting rod and lower pull rod are located at
The end face in the upper clamping area and the lower clamping area is respectively equipped with centering circular hole.
9. Analysis of Concrete Tensile test fixture described in claim according to claim 1~any one of 8, which is characterized in that institute
Stating upper fixture and the lower fixture is carbon steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821743358.3U CN209014385U (en) | 2018-10-25 | 2018-10-25 | Analysis of Concrete Tensile test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821743358.3U CN209014385U (en) | 2018-10-25 | 2018-10-25 | Analysis of Concrete Tensile test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209014385U true CN209014385U (en) | 2019-06-21 |
Family
ID=66840236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821743358.3U Expired - Fee Related CN209014385U (en) | 2018-10-25 | 2018-10-25 | Analysis of Concrete Tensile test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209014385U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289356A (en) * | 2020-03-06 | 2020-06-16 | 同济大学 | Test fixture for concrete axial tension force and use method thereof |
-
2018
- 2018-10-25 CN CN201821743358.3U patent/CN209014385U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289356A (en) * | 2020-03-06 | 2020-06-16 | 同济大学 | Test fixture for concrete axial tension force and use method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190621 Termination date: 20211025 |
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| CF01 | Termination of patent right due to non-payment of annual fee |