CN203745315U - Test device for local punching shear performance of steel tube confined high-strength grouting material - Google Patents
Test device for local punching shear performance of steel tube confined high-strength grouting material Download PDFInfo
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- CN203745315U CN203745315U CN201420117287.1U CN201420117287U CN203745315U CN 203745315 U CN203745315 U CN 203745315U CN 201420117287 U CN201420117287 U CN 201420117287U CN 203745315 U CN203745315 U CN 203745315U
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Abstract
The utility model discloses a test device for the local punching shear performance of a steel tube confined high-strength grouting material. The test device comprises a material piece fixing cylinder, wherein the material piece fixing cylinder is fixedly arranged on a loading pad plate; the upper end of the material piece fixing cylinder is sleeved with a loading positioning clamping ring; an anti-shear key is arranged on the inside wall, close to the bottom, of the material piece fixing cylinder; a high-strength grouting material test piece is arranged in the material piece fixing cylinder; a gap is formed between the high-strength grouting material test piece and the loading pad plate; a circular loading disk is placed on the upper surface of the high-strength grouting material test piece in the loading positioning clamping ring; one end of an upper load transmission rod and one end of a lower load transmission rod are respectively connected with the circular loading disk and the loading pad plate; the other ends of the upper load transmission rod and the lower load transmission rod are connected with an extensometer. The test device has the characteristics of easiness and convenience in machining, clear stress and the like, is high in universality, can be used for local punching shear tests and the like of fine aggregate concrete materials of various types of grouting materials and the like under a steel tube restraining effect, and provides a test basis for comprehensively inspecting the mechanical performance of a building material.
Description
Technical field
The utility model relates to the test unit of the local die-cutting performance of a kind of steel tube confinement high-strength grout, belongs to technical field of structural engineering, for the die-cutting performance experimental study to Structural Engineering material.
Background technology
At present the cutting-bearing capacity of the member such as the mentioned many fingerboards of punching bearing capacity, plate, basis and post cushion cap in Code for design of concrete structures, has provided corresponding check formula in specification.But find in the telescopic nodal connection device design of concrete filled steel tube and mechanical property research, being subject to steel tube confinement high-strength grout is not to bear punching failure, but can there is " local die-cut " destruction trend under steel tube confinement effect, its force-mechanism, destruction form and ultimate bearing capacity are determined with " die-cut " or " shearing " situation completely different, its main difference is that charger is different from the contact range of test specimen upper/lower terminal, the contact area upper and lower from test specimen by charger is different, form die-cut, to investigate its local die-cutting performance.The at present local punch test research of steel tube confinement high-strength grout there is not yet report, and lacking a large amount of fully reliable test figures provides scientific basis for engineering design.This device can be for investigating the anti-local die-cutting performance of the fine aggregate building materialss such as high-strength grout, and device processing is easy, stressed clear and definite, provides test to ensure for investigate high-strength grout mechanical property comprehensively.
Utility model content
The technical problems to be solved in the utility model is, the test unit of the local die-cutting performance of a kind of steel tube confinement high-strength grout is provided, this device has easy, the stressed feature such as clearly of processing, and highly versatile, can be used for die-cut test in part of the fine concrete material such as all kinds of grouting materials under steel tube confinement effect etc., provide test basis to the mechanical property of comprehensive investigation building materials.
For solving the problems of the technologies described above, the utility model adopts following technical proposals:
A test unit for the local die-cutting performance of steel tube confinement high-strength grout, comprises and loads location snap ring, circle loading disc, upper load transmission pole, tens(i)ometer, lower load transmission pole, loading backing plate, materials and parts stationary magazine creel; Described materials and parts stationary magazine creel is arranged on and loads on backing plate, and the upper end of materials and parts stationary magazine creel is socketed in and loads in the snap ring of location; The madial wall of materials and parts stationary magazine creel adjacent bottom is provided with shear key, in materials and parts stationary magazine creel, is high-strength grout test specimen, gapped between high-strength grout test specimen and loading backing plate; Described round loading disc is placed in the upper surface that loads the high-strength grout test specimen in the snap ring of location; One end of described described upper load transmission pole, lower load transmission pole is connected respectively to round loading disc, loads on backing plate; The other end of upper load transmission pole, lower load transmission pole connects tens(i)ometer.
As the further improvement to the technical program, described shear key is outwardly about 10mm-12mm in the horizontal direction.
As the further improvement to the technical program, described shear key is to be connected to the annulus of madial wall.
As the further improvement to the technical program, described loading locator card is equipped with outstanding outer eaves downwards, and materials and parts stationary magazine creel is fixed by outer eaves.
As the further improvement to the technical program, described upper load transmission pole, lower load transmission pole are Metallic rod, and upper load transmission pole is L-shaped, and its one end is welded on the sidewall of round loading disc, and lower load transmission pole is " I " shape; On upper load transmission pole, lower load transmission pole vertical direction on same straight line.
As the further improvement to the technical program, described round loading disc is solid cylindrical steel plate.
The technical program is justified the different contacts area of loading disc and test specimen upper/lower terminal and high-strength grout test specimen by design, to realize the research of its anti-local die-cutting performance.Loading location snap ring, circle loading disc are hard steel, are conducive to ignoring of charger distortion, and this charger is easy to process, stressed clear and definite.Load location snap ring and only play setting circle loading disc, do not participate in test specimen vertical applied force.Described round loading disc and load backing plate not only can transmitted load, can also fix tens(i)ometer, simple installation, easily changes test specimen, can investigate the impact of different parameters on its punching performance.High-strength grout is the grouting material that is not less than C80.
The utility model that adopts technique scheme, compared with prior art, its beneficial effect is:
(1) by the change in size of circle loading disc, make to be subject to steel tube confinement high-strength grout test specimen upper, lower horizontal cross section compression area difference, thereby die-cut of the inner formation of grouting material, thereby its local die-cutting performance investigated.
(2) justify not only transmitted load of loading disc, and can also fix load transmission pole to fix tens(i)ometer, load location snap ring and only play the effect of setting circle loading disc.
(3) gapped between floating of materials and parts stationary magazine creel inner bottom part high-strength grout and loading backing plate, be convenient to the calculating of angle die cutting.
(4) this device highly versatile, can be used for die-cut test in part of the fine concrete material such as all kinds of grouting materials under steel tube confinement effect etc., provides test basis to the mechanical property of comprehensive investigation building materials.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is loading specimen schematic diagram.
Fig. 3 loads location snap ring schematic diagram.
Description of reference numerals: 1-loads location snap ring, 2-circle loading disc, 3-upper load transmission pole, 4-tens(i)ometer, load transmission pole under 5-, 6-loads backing plate, 7-materials and parts stationary magazine creel, die-cut of 8-, 9-shear key, 10-high-strength grout test specimen, 11-loads location snap ring internal diameter, 12-loads the outer eaves internal diameter of location snap ring, and 13-loads location snap ring external diameter, 14-gap.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, and object is only to understand better the utility model content.
Referring to Fig. 1, Fig. 2, Fig. 3, the test unit of the local die-cutting performance of steel tube confinement high-strength grout that the present embodiment provides, comprises and loads location snap ring 1, circle loading disc 2, upper load transmission pole 3, tens(i)ometer 4, lower load transmission pole 5, loading backing plate 6, materials and parts stationary magazine creel 7; Materials and parts stationary magazine creel 7 is arranged on and loads on backing plate 6, and the upper end of materials and parts stationary magazine creel 7 is socketed in and loads in the snap ring 1 of location; The madial wall of materials and parts stationary magazine creel 7 adjacent bottom is provided with shear key 9, in materials and parts stationary magazine creel 7, be high-strength grout test specimen 10, between high-strength grout test specimen 10 and loading backing plate 6 gapped 14; Circle loading disc 2 is placed in the upper surface that loads the high-strength grout test specimen 10 in the snap ring 1 of location; One end of upper load transmission pole 3, lower load transmission pole 5 is connected respectively to round loading disc 2, loads on backing plate 6; The other end of upper load transmission pole 3, lower load transmission pole 5 connects tens(i)ometer 4, by tens(i)ometer 4, measures the vertical deformation of loading specimen.
Shear key 9 is outwardly about 10mm-12mm in the horizontal direction.Shear key 9 is for to be connected to the annulus of madial wall.Load location snap ring 1 and be provided with outstanding outer eaves downwards, materials and parts stationary magazine creel 7 is fixed by outer eaves.Upper load transmission pole 3, lower load transmission pole 5 are Metallic rod, and upper load transmission pole 3 is L-shaped, and its one end is welded on the sidewall of round loading disc 2, and lower load transmission pole 5 is " I " shape; On upper load transmission pole 3, lower load transmission pole 5 vertical directions, on same straight line, circle loading disc 2 is solid cylindrical steel plate.
The utility model is selected hard steel to make circle loading disc 2, is loaded location snap ring 1, load location snap ring 1 internal diameter according to testing requirements design, the i.e. diameter of round loading disc 2, this size directly affects the size of loading specimen angle die cutting, and the size that loads the outer eaves internal diameter 12 of location snap ring and loading location snap ring external diameter 13 does not affect test findings.
Loading location snap ring 1 is placed in to the top of materials and parts stationary magazine creel 7 restraint and high-strength grouting material test specimens 10, on shape, 3 welding of load transmission pole and circle loading disc 2 sidewalls, then put into circle load plate loading location snap ring 1;
When this device uses, first make according to test objective the test specimen that is subject to round steel pipe restraint and high-strength grouting material, by enclosing reinforcing bar as shear key 9 in the interior span of materials and parts stationary magazine creel 7 bottom certain distance welding one, select according to test, then materials and parts stationary magazine creel 7 is inverted, weld shear key 9 ends upward, build high-strength grouting, ensure closely knit filling materials and parts stationary magazine creel 7, test specimen top grouting material and shear key 9 are floating, making has space between floating of the interior high-strength grout of steel pipe and cornice, until testing after maintenance certain hour under rated condition.
When test, adopt pressing machine to apply and be subject to compressive load with loading backing plate 6 circle load plate 2, different from the contact area of test specimen by charger, form different die-cut 8 and angle die cutting, to study the local die-cutting performance of this test specimen.
Claims (6)
1. a test unit for the local die-cutting performance of steel tube confinement high-strength grout, comprises and loads location snap ring, circle loading disc, upper load transmission pole, tens(i)ometer, lower load transmission pole, loading backing plate, materials and parts stationary magazine creel; It is characterized in that:
Described materials and parts stationary magazine creel is arranged on and loads on backing plate, and the upper end of materials and parts stationary magazine creel is socketed in and loads in the snap ring of location; The madial wall of materials and parts stationary magazine creel adjacent bottom is provided with shear key, in materials and parts stationary magazine creel, is high-strength grout test specimen, gapped between high-strength grout test specimen and loading backing plate;
Described round loading disc is placed in the upper surface that loads the high-strength grout test specimen in the snap ring of location;
One end of described upper load transmission pole, lower load transmission pole is connected respectively to round loading disc, loads on backing plate; The other end of upper load transmission pole, lower load transmission pole connects tens(i)ometer.
2. the test unit of the local die-cutting performance of steel tube confinement high-strength grout according to claim 1, is characterized in that: described shear key is outwardly about 10mm-12mm in the horizontal direction.
3. the test unit of the local die-cutting performance of steel tube confinement high-strength grout according to claim 2, is characterized in that: described shear key is to be connected to the annulus of madial wall.
4. the test unit of the local die-cutting performance of steel tube confinement high-strength grout according to claim 1, is characterized in that, described loading locator card is equipped with outstanding outer eaves downwards, and materials and parts stationary magazine creel is fixed by outer eaves.
5. the test unit of the local die-cutting performance of steel tube confinement high-strength grout according to claim 1, it is characterized in that: described upper load transmission pole, lower load transmission pole are Metallic rod, upper load transmission pole is L-shaped, its one end is welded on the sidewall of round loading disc, and lower load transmission pole is " I " shape; On upper load transmission pole, lower load transmission pole vertical direction on same straight line.
6. the test unit of the local die-cutting performance of steel tube confinement high-strength grout according to claim 1, is characterized in that: described round loading disc is solid cylindrical steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420117287.1U CN203745315U (en) | 2014-03-17 | 2014-03-17 | Test device for local punching shear performance of steel tube confined high-strength grouting material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420117287.1U CN203745315U (en) | 2014-03-17 | 2014-03-17 | Test device for local punching shear performance of steel tube confined high-strength grouting material |
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| CN203745315U true CN203745315U (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420117287.1U Expired - Fee Related CN203745315U (en) | 2014-03-17 | 2014-03-17 | Test device for local punching shear performance of steel tube confined high-strength grouting material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596758A (en) * | 2015-02-06 | 2015-05-06 | 河北联合大学 | Pull-out test device and test method thereof of grouting sleeve connectors |
| CN107831070A (en) * | 2017-12-04 | 2018-03-23 | 长沙理工大学 | A kind of compression shear test device of composite pavement structure intensity and fatigue |
-
2014
- 2014-03-17 CN CN201420117287.1U patent/CN203745315U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596758A (en) * | 2015-02-06 | 2015-05-06 | 河北联合大学 | Pull-out test device and test method thereof of grouting sleeve connectors |
| CN104596758B (en) * | 2015-02-06 | 2017-05-10 | 河北联合大学 | Pull-out test device and test method thereof of grouting sleeve connectors |
| CN107831070A (en) * | 2017-12-04 | 2018-03-23 | 长沙理工大学 | A kind of compression shear test device of composite pavement structure intensity and fatigue |
| CN107831070B (en) * | 2017-12-04 | 2024-04-09 | 长沙理工大学 | Compression shear testing device for structural strength and fatigue of composite pavement |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20160317 |
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| CF01 | Termination of patent right due to non-payment of annual fee |