CN106644762A - Double-sided direct shear test device for fiber concrete - Google Patents
Double-sided direct shear test device for fiber concrete Download PDFInfo
- Publication number
- CN106644762A CN106644762A CN201611201894.6A CN201611201894A CN106644762A CN 106644762 A CN106644762 A CN 106644762A CN 201611201894 A CN201611201894 A CN 201611201894A CN 106644762 A CN106644762 A CN 106644762A
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- positioning
- direct shear
- sided direct
- test device
- double
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- 238000012360 testing method Methods 0.000 title claims abstract description 32
- 239000000835 fiber Substances 0.000 title claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 description 8
- 238000010998 test method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the field of testing apparatuses and provides a double-sided direct shear test device for fiber concrete. The double-sided direct shear test device for fiber concrete comprises an upper tool bit, a lower tool bit and positioning rods, wherein a body structure of the upper tool bit is a cross-shaped body, and boss structures are arranged on two vertical sides to form an upper cut. Positioning holes are formed in two horizontal ends of the cross-shaped body, the positioning rods extend into the positioning holes and are used for guiding and positioning. A body structure of the lower tool bit is a cross-shaped body, and boss structures are arranged on two vertical sides to form a lower cut matched with the upper cut. Positioning holes are formed in two horizontal ends of the cross-shaped body, the positioning rods extend into the positioning holes and are used for guiding and positioning. The double-sided direct shear test device has positioning and guiding effects by arranging the positioning rods and positioning holes on the shear resisting tool bits, and torsion and offset of test pieces in the testing process are limited, so that the stress form of the test pieces are close to a double-sided direct shear state, and the reliability of a testing result is improved. The double-sided direct shear test device is low in cost, convenient to operate and easy to implement and has very good application prospect and practical value.
Description
Technical field
The invention belongs to experimental rig field, is related specifically to a kind of two-sided direct shear test device of fiber concrete.
Background technology
Fiber concrete is one of study hotspot in civil engineering, and the shearing strength of fiber concrete is important as one kind
Mechanical performance index, its method of testing has at present various, wherein two-sided direct shear test is exactly that a kind of simple and easy to do shearing resistance is strong
Degree method of testing.Test specimen stress for vertical shear face direct stress close to zero, there is direct stress in parallel shearing section, though
It is not so pure shearing, but with pure shearing relatively.But two-sided staight scissors examination is often difficult to be destroyed in predetermined face, its
On the one hand main cause is that accuracy of alignment is inadequate, it is difficult to ensure the relative position of upper and lower cutter head accurately, cutter head is difficult to mutual edge
Vertical direction is moved；Further aspect is that often there is certain interval between test specimen and cutter head, test specimen is difficult to uniform-compression.For
These problems are solved, Design Orientation and guider on two-sided direct shear test device is needed.At present,《Fiber concrete is tested
Method standard》(CECS 13：2009) with regard to two-sided direct shear test in, only for the general provision of cutter head, specific examination is had no
Experiment device size and guider form.
The content of the invention
The technical problem to be solved in the present invention is a kind of two-sided direct shear test device of design, can preferably realize positioning with
Guide effect, makes the two-sided direct shear test result of fiber concrete relatively reliable.
A kind of two-sided direct shear test device of fiber concrete, including upper cutter head 1, lower cutter head 2 and locating rod 3；
The agent structure of upper cutter head 1 is crossed body, is vertically provided with boss structure along both sides, the edge of a knife in composition；Crossed body is indulged
Location hole is provided with to two ends, locating rod 3 is stretched in location hole, for positioning and being oriented to；
The agent structure of lower cutter head 2 is crossed body, and vertical both sides are provided with boss structure, constitutes the lower edge of a knife, is matched somebody with somebody with the upper edge of a knife
Close；Crossed body longitudinal direction two ends are provided with location hole, and locating rod 3 is stretched in location hole, for positioning and being oriented to.
Beneficial effects of the present invention：The present invention devises the shear test with simple and easy to do positioning with guider and sets
Standby, using this experimental rig, the failure mechanics of test specimen are basic in predetermined face, increased the two-sided direct shearing examination of fiber concrete
Test the reliability and stability of result.Experimentation cost of the present invention is cheap, easy to operate, easily implements, front with wide application
Scape and practical value.
Description of the drawings
Fig. 1 is two-sided direct shearing device side elevational view.
Fig. 2 is upper cutter head elevation.
Fig. 3 is upper slitter head plane figure.
Fig. 4 is lower cutter head elevation.
Fig. 5 is lower cutter head plan.
In figure：Cutter head on 1；2 times cutter heads；3 locating rods；4 test specimens.
Specific embodiment
Below in conjunction with accompanying drawing and technical scheme, the specific embodiment of the present invention is further illustrated.
A kind of two-sided direct shear test device of fiber concrete, including upper cutter head 1, lower cutter head 2 and locating rod 3；
The agent structure of upper cutter head 1 is crossed body, and vertical both sides are provided with boss structure, the edge of a knife in composition；Crossed body longitudinal direction
Two ends are provided with location hole, and locating rod 3 is stretched in location hole, for being oriented to and positioning；
The agent structure of lower cutter head 2 is crossed body, and vertical both sides are provided with boss structure, constitutes the lower edge of a knife, is matched somebody with somebody with the upper edge of a knife
Close；Crossed body longitudinal direction two ends are provided with location hole, and locating rod 3 is stretched in location hole, for being oriented to and positioning；
Diameter of phi 25.5mm of described location hole, diameter of phi 25mm of described locating rod 3, long 180mm.
The described diameter of locating rod 3 is unsuitable too small, to ensure that, when alignment error is larger, locating rod has enough rigidity；
Gap between locating rod 3 and location hole is preferably selected in 0.5mm, this is because conference is crossed in gap reduces accuracy of alignment, but gap mistake
It is little, the micro gap between concrete sample and shearing resistance cutter head can be amplified, one side is likely to result in when serious and is cut, find through test
The gap of 0.5mm is relatively reasonable.Locating rod 3 is unsuitable long, is first to prevent locating rod stress in whole process of the test, another
Aspect locating rod is longer, and because the position error that drift angle is caused is bigger, this can increase installation difficulty, reduce accuracy of alignment, Jing
Multiple repetition test is crossed, this plant bulk is finally determined.
Claims (2)
1. a kind of two-sided direct shear test device of fiber concrete, it is characterised in that the two-sided direct shear test device of the fiber concrete
Including upper cutter head (1), lower cutter head (2) and locating rod (3)；
The agent structure of upper cutter head (1) is crossed body, and vertical both sides are provided with boss structure, the edge of a knife in composition；Crossed body horizontal two
End is provided with location hole, during locating rod (3) stretches into location hole, for being oriented to and positioning；
The agent structure of lower cutter head (2) is crossed body, and vertical both sides are provided with boss structure, constitutes the lower edge of a knife, is coordinated with the upper edge of a knife；
Crossed body transverse ends are provided with location hole, during locating rod (3) stretches into location hole, for being oriented to and positioning.
2. the two-sided direct shear test device of fiber concrete according to claim 1, it is characterised in that described location hole
Diameter of phi 25.5mm, diameter of phi 25mm of described locating rod (3), long 180mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611201894.6A CN106644762A (en) | 2016-12-23 | 2016-12-23 | Double-sided direct shear test device for fiber concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611201894.6A CN106644762A (en) | 2016-12-23 | 2016-12-23 | Double-sided direct shear test device for fiber concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106644762A true CN106644762A (en) | 2017-05-10 |
Family
ID=58827160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611201894.6A Pending CN106644762A (en) | 2016-12-23 | 2016-12-23 | Double-sided direct shear test device for fiber concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106644762A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000193572A (en) * | 1998-12-28 | 2000-07-14 | Kanto Auto Works Ltd | Test apparatus for evaluating durability of concrete, and durability evaluating method of concrete |
| CN101598630A (en) * | 2009-06-30 | 2009-12-09 | 西安建筑科技大学 | A kind of two-way edge of a knife bearing centering and levelling test device |
| CN201673091U (en) * | 2010-05-19 | 2010-12-15 | 华侨大学 | Auxiliary loading device for compressed column test |
| CN202770709U (en) * | 2012-08-23 | 2013-03-06 | 长安大学 | Double-faced sliding shearing tester of asphalt mixture |
| CN103105338A (en) * | 2013-01-23 | 2013-05-15 | 重庆大学 | Microscopic cracking evolution process test equipment for bifacial shearing of coal petrography |
| CN203422290U (en) * | 2013-09-09 | 2014-02-05 | 江苏省建筑科学研究院有限公司 | Special device for detecting masonry shearing strength by using shearing-resistant specimen shearing method |
| CN204269475U (en) * | 2014-11-28 | 2015-04-15 | 中国科学院寒区旱区环境与工程研究所 | Tensile Strength of Frozen Soil proving installation |
| CN206248481U (en) * | 2016-12-23 | 2017-06-13 | 大连理工大学 | The two-sided direct shear test device of fiber concrete |
-
2016
- 2016-12-23 CN CN201611201894.6A patent/CN106644762A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000193572A (en) * | 1998-12-28 | 2000-07-14 | Kanto Auto Works Ltd | Test apparatus for evaluating durability of concrete, and durability evaluating method of concrete |
| CN101598630A (en) * | 2009-06-30 | 2009-12-09 | 西安建筑科技大学 | A kind of two-way edge of a knife bearing centering and levelling test device |
| CN201673091U (en) * | 2010-05-19 | 2010-12-15 | 华侨大学 | Auxiliary loading device for compressed column test |
| CN202770709U (en) * | 2012-08-23 | 2013-03-06 | 长安大学 | Double-faced sliding shearing tester of asphalt mixture |
| CN103105338A (en) * | 2013-01-23 | 2013-05-15 | 重庆大学 | Microscopic cracking evolution process test equipment for bifacial shearing of coal petrography |
| CN203422290U (en) * | 2013-09-09 | 2014-02-05 | 江苏省建筑科学研究院有限公司 | Special device for detecting masonry shearing strength by using shearing-resistant specimen shearing method |
| CN204269475U (en) * | 2014-11-28 | 2015-04-15 | 中国科学院寒区旱区环境与工程研究所 | Tensile Strength of Frozen Soil proving installation |
| CN206248481U (en) * | 2016-12-23 | 2017-06-13 | 大连理工大学 | The two-sided direct shear test device of fiber concrete |
Non-Patent Citations (1)
| Title |
|---|
| 刘磊 等: "蒸压加气混凝土砌块抗剪性能试验研究", 《硅酸盐通报》 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170510 |
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| RJ01 | Rejection of invention patent application after publication |