CN207908263U - A kind of reusable steel bonding formula Analysis of Concrete Tensile piece fixture - Google Patents
A kind of reusable steel bonding formula Analysis of Concrete Tensile piece fixture Download PDFInfo
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- CN207908263U CN207908263U CN201820412427.6U CN201820412427U CN207908263U CN 207908263 U CN207908263 U CN 207908263U CN 201820412427 U CN201820412427 U CN 201820412427U CN 207908263 U CN207908263 U CN 207908263U
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- steel
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- insert sleeve
- collar
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 193
- 239000010959 steel Substances 0.000 title claims abstract description 193
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 10
- 238000003780 insertion Methods 0.000 claims abstract description 3
- 230000037431 insertion Effects 0.000 claims abstract description 3
- 238000012360 testing method Methods 0.000 claims description 23
- 238000002474 experimental method Methods 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005588 protonation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Abstract
The utility model is related to a kind of reusable steel bonding formula Analysis of Concrete Tensile piece fixtures, are mainly made of the identical clamping part of two structures；Each clamping part includes sequentially connected steel collar, insert sleeve steel part, embedded steel column, power transmission chain；Steel collar is sleeved on concrete sample end；Insert sleeve steel part includes the insert sleeve steel part of upper end and the steel plate of lower end；Insert sleeve steel part, which has, accommodates the identical embedded groove of embedded steel column, and side has pin hole；Steel plate bottom surface is Nian Jie with steel collar end face and concrete sample end face gluing；In embedded steel column insertion insert sleeve steel part, has in the middle part of insert sleeve steel part, embedded steel column and accommodate the perforative pin hole of same root pin；Power transmission chain is fixed on the top of embedded steel column.Steel bonding formula Analysis of Concrete Tensile piece fixture simple structure provided by the utility model, easy to operation, detachable and reuse, the axial tension for being suitable for a variety of concrete samples is tested.
Description
Technical field
The utility model belongs to civil engineering concrete test field, and in particular to a kind of reusable steel bonding formula is mixed
Solidifying soil tensile test specimen fixture.
Background technology
Concrete is as a kind of fragile material, the natural defect that has that tensile strength is low, deformability is weak and ductility is poor etc..
The destruction of concrete material, structure and component returns root knot topic to be the tensile failure that concrete generates.Therefore, concrete in tension
The research of energy and tension constitutive relation designs concrete structure engineering and application is of great significance.
There are mainly three types of concrete in tension method for testing performances：Split drawing experiment, direct pulling experiment and bending test.Wherein, directly
Connect stress measured by tension test, strain value corresponds to the most clear, most can directly reflect tensile strength and the deformation of concrete
Performance, to obtain the constitutive relationship of stress-strain of concrete.However, due to the natural brittleness of concrete, tensile strength pole
It is low, ductility is poor, be difficult to measure concrete in tension load-deformation curve peak after-tack section using common test method, hinder
The overall merit of concrete in tension performance.In addition, concrete sample must have reliable and stable connection that could protect with testing machine
Demonstrate,prove the transmission of axial tension.Therefore, survey of the rational design of concrete sample fixture to concrete in tension stress-strain curve
Examination has key effect, and should ensure that test specimen centering installation, reasonable stress, avoids stress concentration and should be guaranteed that repeat
It utilizes.
There are mainly three types of common concrete uniaxial direct tensile specimen holder modes：Built-in type, end be bonded and side clamp type.
Wherein, the bonded advantage in end is, test specimen holds that lotus area is big, uniform force, is easily guaranteed that test specimen is completely in axis and draws shape
State and destroy.But it still has many shortcomings, is embodied in：It is not easy to ensure in, test specimen pair higher to bonding agent intensity requirement, pacify
Assembly and disassembly are difficult, it is difficult to reuse.
Utility model content
The utility model in view of the deficiencies of the prior art, provides a kind of reusable steel bonding formula Analysis of Concrete Tensile examination
Part fixture.
The technical solution adopted in the utility model specifically,
A kind of reusable steel bonding formula Analysis of Concrete Tensile piece fixture, it is characterised in that：
It is mainly made of two clamping parts, is respectively arranged in concrete sample both ends, for concrete sample to be fixed on
Between two loading ends of tension experiment loading unit；
Described two clamping part structures are identical, including sequentially connected steel collar, insert sleeve steel part, built-in steel
Column, power transmission chain；
The steel collar is sleeved on concrete sample end；The insert sleeve steel part is cast member, including upper end is embedding
Enter formula sleeve steel part and the steel plate of lower end；Insert sleeve steel part, which has, accommodates the identical embedded groove of embedded steel column, side
With pin hole；Steel plate and steel collar, the two cross-sectional circumference shape and size are identical；Steel plate bottom surface and steel collar end face and
Concrete sample end face gluing bonding；
In the embedded steel column insertion insert sleeve steel part, have in the middle part of insert sleeve steel part, embedded steel column
The perforative pin hole of same root pin is accommodated, by being inserted into same root pin in the middle part of insert sleeve steel part, embedded steel column
It is fixed；
The power transmission chain is fixed on the top of embedded steel column, and free end adds for connecting tension experiment loading unit
End is carried, for preventing concrete sample eccentric.
In above-mentioned fixture, the steel collar, insert sleeve steel part, embedded steel column, power transmission chain have same center
Axis, and overlapped with concrete sample central axis.
In above-mentioned fixture, the steel collar, insert sleeve steel part, embedded steel column cross-sectional circumference shape and concrete
Test specimen cross-sectional circumference shape is identical, for round, square, rectangle or the sides N shape, N >=5.
In above-mentioned fixture, the steel plate thickness is not less than 20mm, is highly not less than 10mm.
In above-mentioned fixture, the steel collar internal diameter is bigger 1~3mm than concrete sample diameter.
In above-mentioned fixture, one of described steel collar end face has symmetrical axial screw keyhole, by spiral shell
Keyhole mounting screw is for accommodating displacement measurement extensometer；Steel plate bottom surface and steel collar non-bolt hole end surface and concrete sample
End face gluing bonding.
In above-mentioned fixture, the diameter of bolt hole is not less than 4mm.
In above-mentioned fixture, one of described steel collar end face has symmetrical axial rod, for accommodating position
Move test extensometer；Steel plate bottom surface is Nian Jie with steel collar rod piece end face and concrete sample end face gluing.
In above-mentioned fixture, the steel plate bottom surface it is Nian Jie with steel collar end face and concrete sample end face gluing using
Epoxy resin fundamental mode building structure steel bonding glue.
In above-mentioned fixture, the power transmission chain is formed by the dismountable gimmal of multi-disc is all linked with one another, for adjusting test specimen
Height in loading system.
Steel bonding formula Analysis of Concrete Tensile piece fixture simple structure provided by the utility model, it is easy to operation, detachably lay equal stress on
Multiple to utilize, the axial tension for being suitable for a variety of concrete samples is tested；The utility model fixture can measure power-position of concrete
Curve is moved, the curve of descending branch can be obtained.
Description of the drawings
Fig. 1 is 1 steel bonding formula cylinder Analysis of Concrete Tensile piece fixture of embodiment.
Fig. 2 is concrete sample pictorial diagram after 1 steel bonding of embodiment.
Fig. 3 is concrete in tension load-displacement full curve test result figure under 1 cyclic load of embodiment.
In attached drawing 1：1- steel collars；2- insert sleeve steel parts；2a- insert sleeve steel parts；2b- steel plates；2c- pins
Hole；2d- grooves；The embedded steel columns of 3-, 3a- pins hole；4- pins；5- power transmission chains；6- bolts hole；7- concrete samples.
Specific implementation mode
The utility model is understood and implemented for the ease of those of ordinary skill in the art, it is right with reference to the accompanying drawings and embodiments
The utility model is described in further detail, it should be appreciated that embodiment described herein is only used for describing and explaining
The utility model is not used to limit the utility model.
A kind of reusable steel bonding formula Analysis of Concrete Tensile piece fixture, is mainly made of two clamping parts, pacifies respectively
Loaded on concrete sample both ends, for concrete sample to be fixed between two loading ends of tension experiment loading unit；
Described two clamping part structures are identical, including sequentially connected steel collar 1, insert sleeve steel part 2, built-in steel
Column 3, power transmission chain 5；
The steel collar 1 is ring-type, is sleeved on 7 end of concrete sample；One of the steel collar 1 end face have pair
The axial screw keyhole 6 for claiming distribution, by being used to accommodate displacement measurement extensometer in bolt hole mounting screw；
The insert sleeve steel part 2 is cast member, includes the steel plate 2b of the insert sleeve steel part 2a of upper end and lower end；
Insert sleeve steel part 2a, which has, accommodates the identical embedded groove 2d of embedded steel column 3, and side has pin hole 2c；Steel plate 2b and
Steel collar 1, the two cross-sectional circumference shape and size are identical；
Embedded steel column 3 is embedded in insert sleeve steel part 2, and insert sleeve steel part 2,3 middle part of embedded steel column have
Same root pin 4 perforative pin hole 2c, 3d are accommodated, it is same by being inserted at insert sleeve steel part 2,3 middle part of embedded steel column
A piece pin 4 is fixed；
Power transmission chain 5 is fixed on the top of embedded steel column 3, and free end is for connecting the load of tension experiment loading unit
End, it is just eccentric for preventing concrete sample eccentric, and caused by adjusting test specimen making processing etc..
Steel collar 1, insert sleeve steel part 2, embedded steel column 3, power transmission chain 5 have a same central axis, and with it is mixed
7 central axis of solidifying soil test specimen overlaps.
Steel collar 1, insert sleeve steel part 2,3 cross-sectional circumference shape of embedded steel column and 7 cross section of concrete sample
Peripheral shape is identical, for round, square, rectangle or the sides N shape, N >=5.
6 diameter of bolt hole is determined according to experiment actual conditions, is not less than 4mm.
Steel plate 2b thickness and height determine that thickness is not less than 20mm all in accordance with experiment actual conditions, are highly not less than 10mm.
1 internal diameter of steel collar is bigger 1~3mm than 7 diameter of concrete sample.
Power transmission chain 5 is formed by the dismountable gimmal of multi-disc is all linked with one another, for adjusting test specimen in loading system
Highly.
Insert sleeve steel part 2,3 middle part of embedded steel column are respectively provided with the circular hole to match with pin 4, and pin 4 is straight
Diameter is not less than 10mm.Pin 4 is using the steel with insert sleeve steel part 2,3 same material of embedded steel column, or uses strong
Spend identical steel.
1 material of steel collar is identical as 2 material of insert sleeve steel part.
The bottom surfaces steel plate 2b and 1 non-bolt hole end surface of steel collar and 7 end face of concrete sample are be bonded by colloid, colloid
The room temperature curing time, colloid tensile strength was not easy to be less than 30MPa no more than 24 hours, shearing strength not preferably less than 18MPa, and
Steel concrete sample is just being drawn adhesion strength disclosure satisfy that experiment in test specimen ultimate tensile strength.Used glue is preferably epoxy
Resin fundamental mode building structure steel bonding glue, cementability are as follows：Steel to steel shearing strength standard value >=15MPa, steel to steel docking
Adhesive tensile resistance intensity >=33MPa, steel are just drawing adhesion strength >=4MPa to C40 concrete.
When steel collar is detached with steel plate and concrete sample, can steel collar side be tapped with iron hammer first, concrete is made to try
Sample is detached from steel plate shearing.Lantern ring inner concrete is cleaned out with iron hammer or drilling machine again.
Embodiment 1：
Such as attached Fig. 1 and 2, concrete sample is a diameter of 75mm, is highly the cylinder of 200mm, original concrete test specimen
Design strength grade is C40, and corrugated steel fiber volume volume is 1.0%.It is in the middle part of test specimen that concrete sample, which tests gauge length,
100mm。
The steel plate of insert sleeve steel part lower end is circle, and steel collar is circle.
Steel collar internal diameter size is 77mm, outer diameter 103mm, is highly 25mm.Two bolts of symmetrical machining in steel collar
Hole, aperture 6mm, hole depth 10mm.
Insert sleeve steel part lower end steel plate is circle, a diameter of 103mm, steel plate thickness 20mm.Upper end steel bushing
It is 52mm, outer diameter 72mm, wall thickness 10mm, set that cylinder top, which has the groove to match with embedded steel column, steel bushing internal diameter,
Cylinder height is 70mm.Two symmetrical holes, hole diameter and pin diameter matches are processed at steel bushing centre-height, are
16mm。
Built-in steel column diameter is 50mm, is highly 70mm, and hole, built-in steel are processed at embedded steel column centre-height
The hole diameter of column is matched with the hole diameter of pin diameter, steel bushing, a diameter of 16mm.
Pin is cylinder, a diameter of 15mm, length 80mm.
Power transmission chain is formed by the dismountable gimmal of multi-disc is all linked with one another.
Steel collar, insert sleeve steel part, embedded steel column material should be consistent.Pin material with it is described above consistent
Or strength character is higher than above-mentioned steel.
Steel collar, insert sleeve steel part lower end steel plate and concrete sample center are maintained on same axis.
Armor plate strength grade, steel plate thickness and steel plate sectional dimension are all in accordance with concrete sample design requirement in actual tests
It determines.
Steel plate bottom surface is Nian Jie with steel collar non-bolt hole end surface and concrete sample end face gluing, and used glue is
Epoxy resin-matrix building structure steel bonding glue；
Strain rate is selected to control Protonation constant, loading speed is 5 × 10-6/s.Before peak load plus unload three cycles, peak value
After load plus unload 8 cycles.Concrete load-displacement full curve is shown in attached drawing 3, and figure explanation can by the utility model fixture
The force-displacement curve of concrete is measured, the curve of descending branch can be obtained.
It should be understood that the part that this specification does not elaborate belongs to the prior art.
It should be understood that the above-mentioned description for preferred embodiment is more detailed, can not therefore be considered to this
The limitation of utility model patent protection domain, those skilled in the art are not departing under the enlightenment of the utility model
Under the ambit that the utility model claims are protected, replacement or deformation can be also made, each falls within the guarantor of the utility model
Within the scope of shield, the utility model is claimed range and should be determined by the appended claims.
Claims (10)
1. a kind of reusable steel bonding formula Analysis of Concrete Tensile piece fixture, it is characterised in that：
It is mainly made of two clamping parts, is respectively arranged in concrete sample both ends, for concrete sample to be fixed on tension
Between two loading ends of experiment loading unit；
Described two clamping part structures are identical, including sequentially connected steel collar, insert sleeve steel part, embedded steel column, biography
Riding chain item；
The steel collar is sleeved on concrete sample end；
The insert sleeve steel part is cast member, including the insert sleeve steel part of upper end and the steel plate of lower end；Embedded set
Cylinder steel part, which has, accommodates the identical embedded groove of embedded steel column, and side has pin hole；Steel plate and steel collar, the two cross section
Peripheral shape is identical with size；Steel plate bottom surface is Nian Jie with steel collar end face and concrete sample end face gluing；
In the embedded steel column insertion insert sleeve steel part, has in the middle part of insert sleeve steel part, embedded steel column and accommodate
The perforative pin hole of same root pin is carried out by being inserted into same root pin in the middle part of insert sleeve steel part, embedded steel column
It is fixed；
The power transmission chain is fixed on the top of embedded steel column, and free end is for connecting the load of tension experiment loading unit
End, for preventing concrete sample eccentric.
2. reusable steel bonding formula Analysis of Concrete Tensile piece fixture according to claim 1, it is characterised in that：
The steel collar, insert sleeve steel part, embedded steel column, power transmission chain have same central axis, and and concrete
Test specimen central axis overlaps.
3. reusable steel bonding formula Analysis of Concrete Tensile piece fixture according to claim 1, it is characterised in that：
The steel collar, insert sleeve steel part, embedded steel column cross-sectional circumference shape and concrete sample cross-sectional circumference
Shape is identical, for round, square, rectangle or the sides N shape, N >=5.
4. reusable steel bonding formula Analysis of Concrete Tensile piece fixture according to claim 1, it is characterised in that：
The steel plate thickness is not less than 20mm, is highly not less than 10mm.
5. reusable steel bonding formula Analysis of Concrete Tensile piece fixture according to claim 1, it is characterised in that：
The steel collar internal diameter is bigger 1~3mm than concrete sample diameter.
6. reusable steel bonding formula Analysis of Concrete Tensile piece fixture according to claim 1, it is characterised in that：
One of steel collar end face has symmetrical axial screw keyhole, by being used in bolt hole mounting screw
Accommodate displacement measurement extensometer；Steel plate bottom surface is Nian Jie with steel collar non-bolt hole end surface and concrete sample end face gluing.
7. reusable steel bonding formula Analysis of Concrete Tensile piece fixture according to claim 6, it is characterised in that：
The diameter of bolt hole is not less than 4mm.
8. reusable steel bonding formula Analysis of Concrete Tensile piece fixture according to claim 1, it is characterised in that：
One of steel collar end face has symmetrical axial rod, for accommodating displacement measurement extensometer；Steel
Board bottom face is Nian Jie with steel collar rod piece end face and concrete sample end face gluing.
9. reusable steel bonding formula Analysis of Concrete Tensile piece fixture according to claim 1, it is characterised in that：
The steel plate bottom surface is Nian Jie with steel collar end face and concrete sample end face gluing to be built using epoxy resin fundamental mode
Building structure steel bonding glue.
10. reusable steel bonding formula Analysis of Concrete Tensile piece fixture according to claim 1, it is characterised in that：
The power transmission chain is formed by the dismountable gimmal of multi-disc is all linked with one another, for adjusting height of the test specimen in loading system
Degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820412427.6U CN207908263U (en) | 2018-03-26 | 2018-03-26 | A kind of reusable steel bonding formula Analysis of Concrete Tensile piece fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820412427.6U CN207908263U (en) | 2018-03-26 | 2018-03-26 | A kind of reusable steel bonding formula Analysis of Concrete Tensile piece fixture |
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| Publication Number | Publication Date |
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| CN207908263U true CN207908263U (en) | 2018-09-25 |
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| CN201820412427.6U Expired - Fee Related CN207908263U (en) | 2018-03-26 | 2018-03-26 | A kind of reusable steel bonding formula Analysis of Concrete Tensile piece fixture |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443925A (en) * | 2018-12-14 | 2019-03-08 | 南京玻璃纤维研究设计院有限公司 | A kind of test device of fibre single thread tensile modulus of elasticity |
| CN110803465A (en) * | 2019-11-29 | 2020-02-18 | 怀化华晨电子科技有限公司 | Reusable clamping jig |
| CN114428017A (en) * | 2020-10-29 | 2022-05-03 | 中国航发商用航空发动机有限责任公司 | Tensile strength testing tool and tensile strength testing method |
-
2018
- 2018-03-26 CN CN201820412427.6U patent/CN207908263U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443925A (en) * | 2018-12-14 | 2019-03-08 | 南京玻璃纤维研究设计院有限公司 | A kind of test device of fibre single thread tensile modulus of elasticity |
| CN110803465A (en) * | 2019-11-29 | 2020-02-18 | 怀化华晨电子科技有限公司 | Reusable clamping jig |
| CN114428017A (en) * | 2020-10-29 | 2022-05-03 | 中国航发商用航空发动机有限责任公司 | Tensile strength testing tool and tensile strength testing method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20180925 |