CN204043996U - Concrete in uniaxial tension testing machine - Google Patents
Concrete in uniaxial tension testing machine Download PDFInfo
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- CN204043996U CN204043996U CN201420515879.9U CN201420515879U CN204043996U CN 204043996 U CN204043996 U CN 204043996U CN 201420515879 U CN201420515879 U CN 201420515879U CN 204043996 U CN204043996 U CN 204043996U
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Abstract
A kind of concrete in uniaxial tension testing machine, for the tensile force parameter value needed for the tensile strength of survey calculation concrete sample and tensile modulus of elasticity, this concrete in uniaxial tension testing machine comprise roller support apparatus, the first support, the second support, the slide bar connecting this first support and the second support, the push pedal be set on this slide bar, fixing on the secondary support bracket and connect this push pedal oil cylinder, connect the first support the first clamp device, be installed in the pulling force sensor in push pedal and connect the second clamp device of this pulling force sensor; Described first clamp device and the second clamp device connect test specimen respectively, to apply tensile force to this test specimen; Described roller support apparatus is arranged between the first clamp device and the second clamp device, and roller support apparatus height is less than the height of the first support, described roller support apparatus comprises a brace table, connects some castors of brace table and highly regulate pin, brace table is provided with at least three roll shafts, roll shaft is vertical with slide bar.
Description
Technical field
The utility model belongs to concrete field of measuring technique, particularly relates to a kind of concrete in uniaxial tension testing machine.
Background technology
Concrete is a kind of material of inadequate natural endowment work with cracking, and the Study on Deformation of its microcosmic under action of compressive stress and microscopical structure is a lot, but relatively limited about the research of its mechanical property under drawing stress effect.Splitting tensile test is generally adopted indirectly to estimate concrete tensile strength in prior art, but when making in this way, concrete near the point of load often destroys prior to test block, and when calculating tensile strength, artificial is assumed to be perfectly elastic body concrete, and biaxial stress state and the experiment value under uniaxial stress state are obscured mutually, and then there is any discrepancy to cause the experiment value of tensile strength and actual value; In addition, tensile splitting strength test is adopted can not to measure concrete tensile modulus of elasticity.Based on this, for making test findings more accurately and being convenient to measure concrete tensile modulus of elasticity, often adopt test piece end strengthened and in end casting reinforced or bolt, this method is difficult to the error avoiding the slippage between reinforcing bar and concrete to bring sometimes.And the stress before test specimen measurement often has influence on the result of measurement, the impact being subject to force unbalance or self gravitation at such as two ends, all has an impact to the accuracy measured.
Summary of the invention
In view of this, be necessary to provide a kind of concrete in uniaxial tension testing machine that can continue stressed lower removing test specimen self gravitation impact at test specimen.
A kind of concrete in uniaxial tension testing machine, for the tensile force parameter value needed for the tensile strength of survey calculation concrete sample and tensile modulus of elasticity, this concrete in uniaxial tension testing machine comprise roller support apparatus, the first support, the second support, the slide bar connecting this first support and the second support, the push pedal be set on this slide bar, fixing on the secondary support bracket and connect this push pedal oil cylinder, connect the first support the first clamp device, be installed in the pulling force sensor in push pedal and connect the second clamp device of this pulling force sensor; Described first clamp device and the second clamp device connect test specimen respectively, to apply tensile force to this test specimen; Described roller support apparatus is arranged between the first clamp device and the second clamp device, and roller support apparatus height is less than the height of the first support, described roller support apparatus comprises a brace table, connects some castors of brace table and highly regulate pin, brace table is provided with at least three roll shafts, roll shaft is vertical with slide bar.
Preferably, described first support comprises tripod, the rectangular portion connecting these two tripods and the installing plate be fixed in rectangular portion that both sides are parallel to each other; This tripod, rectangular portion and installing plate are vertical placement, described installing plate and rectangular portion vertical described tripod place plane.
Preferably, the outboard end at the middle part of described push pedal is connected with oil cylinder, and the relative biside plate of this push pedal is respectively equipped with linear bearing, is set on described slide bar with correspondence.
Compared with prior art, concrete in uniaxial tension testing machine of the present utility model is by the setting of the roll shaft on the first support, the second support, slide bar, brace table and brace table, make test specimen respectively reach balance to stressed, ensure that the tensile force parameter value needed for the tensile modulus of elasticity that can obtain survey calculation test specimen accurately.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of the concrete in uniaxial tension testing machine of the first embodiment of the present utility model.
Fig. 2 is the vertical view of the concrete in uniaxial tension testing machine of Fig. 1.
In figure: the first support 10, tripod 11, rectangular portion 12, installing plate 13, second support 20, tripod 21, rectangular portion 22, installing plate 23, slide bar 30, push pedal 40, linear bearing 41, pulling force sensor 45, oil cylinder 50, first clamp device 60, clamping plate 61, fixture 62, second clamp device 70, roller support apparatus 80, brace table 81, roll shaft 810, castor 82, highly adjustment pin 83, test specimen 90, prism-shaped concrete 91, reinforcing bar 92.
Embodiment
In order to make the technical solution of the utility model more clearly show, below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1 to Figure 2, for the concrete in uniaxial tension testing machine of the utility model one preferred embodiment, comprise the first support 10, second support 20, connect the slide bar 30 of this first support 10 and the second support 20, the push pedal 40 be set on this slide bar 30, be fixed on the second support 20 and connect this push pedal 40 oil cylinder 50, connect the first clamp device 60 of the first support 10 and connect the second clamp device 70, the roller support apparatus 80 of described push pedal 40.Described first clamp device 60 and the second clamp device 70 connect test specimen 90, respectively to apply tensile force to this test specimen 90.Described roller support apparatus 80 is arranged between the first clamp device 60 and the second clamp device 70, and roller support apparatus 80 is highly less than the height of the first support 10, described roller support apparatus 80 comprises a brace table 81, connect some castors 82 of brace table 81 and highly regulate pin 83, brace table 81 is provided with at least three roll shafts 810, roll shaft 810 is vertical with slide bar 30, the bottom of roller support apparatus 80 to test specimen 90 is so utilized to support, to reduce test specimen 90 self gravitation to the impact of measurement result, when utilizing described first clamp device 60 and the second clamp device 70 pairs of test specimens 90 to apply tensile force, roll shaft 810 can reduce the resistance of the axis to test specimen 90, so can improve the degree of accuracy of measurement result.Highly regulating pin 83 by regulating, making roll shaft 810 and test specimen 90 close contact.
Described first support 10 comprises tripod 11, the rectangular portion 12 connecting these two tripods 11 and the installing plate 13 be fixed in rectangular portion 12 that both sides are parallel to each other.This tripod 11, rectangular portion 12 and installing plate 13 are vertical placement, wherein installing plate 13 and rectangular portion 12 vertical described tripod 11 place plane.The structure of described second support 20 and the similar of the first support 10, comprise tripod 21, rectangular portion 22 and installing plate 23, and the installing plate 23 that described oil cylinder 50 is fixed on described second support 20 is connected with described push pedal 40 through this installing plate 23.
The outboard end at the middle part of described push pedal 40 is connected with oil cylinder 50, and medial extremity installs a pulling force sensor 45, and this pulling force sensor 45 is connected with described test specimen 90 by the second clamp device 70.The relative biside plate of this push pedal 40 is respectively equipped with linear bearing 41, is set on described slide bar 30 with correspondence.
This first clamp device 60 comprises the clamping plate 61 of two rectangles and connects the fixture 62 of two clamping plate 61, and the clamping plate 61 of described inner side are connected with test specimen 90.The structure of described second clamp device 70 is identical with the first clamp device 60.
Described test specimen 90 adopts prism-shaped concrete 91 center of lengthwise to arrange reinforcing bar 92 and reinforcing bar foil gauge (not shown) in the utility model, arrange concrete strain sheet (not shown) on the surperficial mountain of concrete 91, the length that the end face 90mm of concrete 91 is stretched out at these reinforcing bar 92 two ends is respectively threaded fixing for described first clamp device 60 and the second clamp device 70.There is taper for preventing the end of concrete 91 under action of pulling stress to destroy, separant smeared by reinforcing bar 92 within the scope of each 120mm of concrete 91 both ends of the surface and is set to adhesive free region with adhesive tape parcel, middle part concrete 91 is bond regions with the coupling part of reinforcing bar 92, is measured the tensile modulus of elasticity of test specimen 90 by reinforcing bar 92 and the bonding of concrete 91.
During work, one end of test specimen 90 is fixed on the first support 10 by the first clamp device 60, the other end of test specimen 90 is fixed on oil cylinder 50 by push pedal 40 and pulling force sensor 45 by the second clamp device 70, when oil cylinder 50 outwards applies different pulling force, by push pedal 40, pulling force sensor 45, second clamp device 70 pulls test specimen 90, stretching force value is obtained by pulling force sensor 45, by reinforcing bar foil gauge, concrete strain sheet obtains corresponding reinforcing bar strain value, concrete strain value, according to the reinforcing bar strain value of record, stretching force value and the following concrete tensile stress values of formulae discovery:
In formula,
: Analysis of Concrete Tensile stress,
p: deformed bar end pulling force,
a s: deformed bar nominal basal area,
e s: deformed bar elastic modulus,
: test specimen central, threaded reinforcing bar strain mean,
a c: concrete sample basal area.Such as, above-mentioned each parameter value that the correspondence recorded when ftractureing occurs concrete during test first being substituted into above formula, the tensile stress values that concrete is corresponding when occurring to ftracture first can being obtained.
The tensile modulus of elasticity of concrete sample is finally calculated according to the concrete strain value of record and the Analysis of Concrete Tensile stress value of calculating.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (3)
1. a concrete in uniaxial tension testing machine, for the tensile force parameter value needed for the tensile strength of survey calculation concrete sample and tensile modulus of elasticity, it is characterized in that: this concrete in uniaxial tension testing machine comprise roller support apparatus, the first support, the second support, the slide bar connecting this first support and the second support, the push pedal be set on this slide bar, fixing on the secondary support bracket and connect this push pedal oil cylinder, connect the first support the first clamp device, be installed in the pulling force sensor in push pedal and connect the second clamp device of this pulling force sensor; Described first clamp device and the second clamp device connect test specimen respectively, to apply tensile force to this test specimen; Described roller support apparatus is arranged between the first clamp device and the second clamp device, and roller support apparatus height is less than the height of the first support, described roller support apparatus comprises a brace table, connects some castors of brace table and highly regulate pin, brace table is provided with at least three roll shafts, roll shaft is vertical with slide bar.
2. concrete in uniaxial tension testing machine as claimed in claim 1, is characterized in that: described first support comprises tripod, the rectangular portion connecting these two tripods and the installing plate be fixed in rectangular portion that both sides are parallel to each other; This tripod, rectangular portion and installing plate are vertical placement, described installing plate and rectangular portion vertical described tripod place plane.
3. concrete in uniaxial tension testing machine as claimed in claim 1, it is characterized in that: the outboard end at the middle part of described push pedal is connected with oil cylinder, the relative biside plate of this push pedal is respectively equipped with linear bearing, is set on described slide bar with correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420515879.9U CN204043996U (en) | 2014-09-10 | 2014-09-10 | Concrete in uniaxial tension testing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420515879.9U CN204043996U (en) | 2014-09-10 | 2014-09-10 | Concrete in uniaxial tension testing machine |
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| Publication Number | Publication Date |
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| CN204043996U true CN204043996U (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420515879.9U Expired - Fee Related CN204043996U (en) | 2014-09-10 | 2014-09-10 | Concrete in uniaxial tension testing machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258890A (en) * | 2015-11-20 | 2016-01-20 | 天津大学 | Device for testing anti-seismic performance of shear wall under tension, bending and shear composite action |
| CN106840888A (en) * | 2016-11-07 | 2017-06-13 | 西南交通大学 | A kind of Analysis of Concrete Tensile experimental rig and its method of testing |
| CN111982673A (en) * | 2020-07-23 | 2020-11-24 | 河海大学 | Height-adjustable soil body uniaxial tensile test method with sliding rod |
-
2014
- 2014-09-10 CN CN201420515879.9U patent/CN204043996U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258890A (en) * | 2015-11-20 | 2016-01-20 | 天津大学 | Device for testing anti-seismic performance of shear wall under tension, bending and shear composite action |
| CN106840888A (en) * | 2016-11-07 | 2017-06-13 | 西南交通大学 | A kind of Analysis of Concrete Tensile experimental rig and its method of testing |
| CN111982673A (en) * | 2020-07-23 | 2020-11-24 | 河海大学 | Height-adjustable soil body uniaxial tensile test method with sliding rod |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20160910 |