CN204177685U - A kind of concrete reinforcement bond stress pick-up unit - Google Patents
A kind of concrete reinforcement bond stress pick-up unit Download PDFInfo
- Publication number
- CN204177685U CN204177685U CN201420624138.4U CN201420624138U CN204177685U CN 204177685 U CN204177685 U CN 204177685U CN 201420624138 U CN201420624138 U CN 201420624138U CN 204177685 U CN204177685 U CN 204177685U
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- test specimen
- reinforcing bar
- base
- holes
- concrete test
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- Expired - Fee Related
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a kind of concrete reinforcement bond stress pick-up unit, comprise pressure testing machine, base with holes placed by the lower platen of pressure testing machine, band reinforcement planting concrete test specimen is placed on base with holes, reinforcing bar in this band reinforcement planting concrete test specimen aligns with the through hole of base with holes, the top board of pressure testing machine is corresponding with the reinforcing bar of band reinforcement planting concrete test specimen, base with holes is positioned on pressure testing machine by the utility model, band reinforcement planting concrete test specimen is positioned on base, after starting pressing machine, what pressing machine top board acted on test specimen exposes on reinforcing bar, and eject its circular hole in the middle part of base with holes, thus detect the bond stress size between concrete and rebar, the utility model structure is simple, easy to operate, there is fine practicality.
Description
Technical field
The utility model relates to a kind of concrete reinforcement bond stress pick-up unit, belongs to building materials pick-up unit and method field.
Background technology
Bond stress is the physical quantity of concrete opposing slippage of reinforced bar ability, and generally, bond strength refers to along the shear stress on reinforcing bar and concrete surface, that is is bond stress.In fact, the stress of reinforcing bar surrounding concrete and deformation state more complicated, bond stress makes reinforcement stresses change along with grip length, so, bond strength along with bar types, face shaping and the burial place in concrete, the difference in direction and changing, also relevant with concrete self-strength, namely concrete crushing strength is higher, and bond strength is larger.
Utility model content
The purpose of this utility model is: for the upper defect of prior art, a kind of concrete reinforcement bond stress pick-up unit is provided, it can utilize usual pressure testing machine to carry out the experimental test of concrete reinforcement bond stress, and quick and convenient and test data is accurate, to overcome the deficiencies in the prior art.
The technical solution of the utility model
A kind of concrete reinforcement bond stress pick-up unit, comprise pressure testing machine, base with holes placed by the lower platen of pressure testing machine, band reinforcement planting concrete test specimen is placed on base with holes, reinforcing bar in this band reinforcement planting concrete test specimen aligns with the through hole of base with holes, and the top board of pressure testing machine is corresponding with the reinforcing bar of band reinforcement planting concrete test specimen.
In aforesaid concrete reinforcement bond stress pick-up unit, reinforcing bar in described band reinforcement planting concrete test specimen is positioned in the middle part of band reinforcement planting concrete test specimen, align with band reinforcement planting concrete test specimen in this reinforcing bar bottom, and reinforcing bar length 10 ~ 20mm larger than described band reinforcement planting concrete height of specimen.
The utility model principle: adopt a kind of concrete reinforcement bond stress detection method, be placed on together between the top board of pressure testing machine and lower platen with reinforcement planting concrete test specimen and base with holes, reinforcing bar in this band reinforcement planting concrete test specimen aligns with the through hole of base with holes, pressing machine top board is reduced to reinforcing bar top, start loading, when force value exceed concrete to the bond stress of reinforcing bar after, namely reinforcing bar is ejected from the circular hole of base, then complete detection experiment; Wherein the method for making of this band reinforcement planting concrete test specimen is: when the die trial of the standard of use is carried out shaping to concrete sample, reinforcing bar length being greater than concrete sample height 10 ~ 20mm to be implanted in the middle part of concrete sample and is alignd with concrete sample in reinforcing bar bottom, then to compacted concrete, 1 ~ 2 fills out form removal forming strip reinforcement planting concrete test specimen.
Owing to have employed technique scheme, compared with prior art, base with holes is positioned on pressure testing machine by the utility model, and band reinforcement planting concrete test specimen is positioned on base, after starting pressing machine, what pressing machine top board acted on test specimen exposes on reinforcing bar, and eject its circular hole in the middle part of base with holes, thus detecting the bond stress size between concrete and rebar, structure of the present invention is simple, easy to operate, there is fine practicality.
Accompanying drawing explanation
Accompanying drawing 1 is the utility model structural representation;
Accompanying drawing 2 is front views of reinforcement planting concrete test specimen in the utility model;
Accompanying drawing 3 is vertical views of base with holes in the utility model.
Being labeled as in accompanying drawing: 1-pressure testing machine, 2-lower platen, 3-base with holes, 4-reinforcement planting concrete test specimen, 5-top board, 6-reinforcing bar.
Embodiment
Below in conjunction with accompanying drawing to the utility model with being described in further detail, but not as to any restriction of the present utility model.
Embodiment of the present utility model: a kind of concrete reinforcement bond stress detection method, be placed on together between the top board of pressure testing machine and lower platen with reinforcement planting concrete test specimen and base with holes, reinforcing bar in this band reinforcement planting concrete test specimen aligns with the through hole of base with holes, pressing machine top board is reduced to reinforcing bar top, start loading, when force value exceed concrete to the bond stress of reinforcing bar after, namely reinforcing bar is ejected from the circular hole of base, then complete detection experiment.
Wherein the method for making of band reinforcement planting concrete test specimen is: when the die trial of the standard of use is carried out shaping to concrete sample, reinforcing bar length being greater than concrete sample height 10 ~ 20mm to be implanted in the middle part of concrete sample and is alignd with concrete sample in reinforcing bar bottom, then to compacted concrete, 1 ~ 2 fills out form removal forming strip reinforcement planting concrete test specimen.
A kind of concrete reinforcement bond stress pick-up unit constructed by said method, as shown in drawings, comprise pressure testing machine 1, base 3 with holes placed by the lower platen 2 of pressure testing machine 1, band reinforcement planting concrete test specimen 4 is placed on base 3 with holes, reinforcing bar in this band reinforcement planting concrete test specimen aligns with the through hole of base with holes, and the top board 5 of pressure testing machine 1 is corresponding with the reinforcing bar 6 of band reinforcement planting concrete test specimen 4.
Reinforcing bar 6 in wherein said band reinforcement planting concrete test specimen 4 is positioned in the middle part of band reinforcement planting concrete test specimen 4, aligns with band reinforcement planting concrete test specimen 4 in this reinforcing bar 6 bottom, and reinforcing bar 6 length 10 ~ 20mm highly larger than described band reinforcement planting concrete test specimen 4.
Specifically be made as
Preliminary work before test: adopt cutting machine, φ 10 reinforcing bar is cut into the reinforcing bar of length 160 ± 10mm; After completing concrete mixing, use standard die trial (150 × 150 × 150mm) to carry out the making of test block, reinforcing bar is positioned in the middle part of test specimen, reinforcing bar one end is close to bottom die trial, point two-layer loading concrete, uses tamper to plug and pound closely knit, and form removal after 1d also moves into fog room and carries out maintenance.
Arrive after testing the length of time, pressure testing machine is tested: base centering with holes is positioned on pressing machine lower platen, again reinforcement planting concrete test specimen centering is positioned on base, starting pressure machine, pressing machine top board is reduced to reinforcing bar top, start loading, when force value exceed concrete to the bond stress of reinforcing bar after, namely reinforcing bar is ejected from the circular hole of base, and obtains failing load by pressing machine.
The foregoing is only preferred embodiments of the present invention, be not intended to limit protection scope of the present invention, all any amendments done within the spirit and principles in the present invention are equivalent to be replaced and improves, and all should be included within protection scope of the present invention.
Claims (2)
1. a concrete reinforcement bond stress pick-up unit, comprise pressure testing machine (1), it is characterized in that: the lower platen (2) in pressure testing machine (1) is upper places base with holes (3), band reinforcement planting concrete test specimen (4) is placed on base with holes (3), reinforcing bar in this band reinforcement planting concrete test specimen aligns with the through hole of base with holes, and the top board (5) of pressure testing machine (1) is corresponding with the reinforcing bar (6) of band reinforcement planting concrete test specimen (4).
2. concrete reinforcement bond stress pick-up unit according to claim 1, it is characterized in that: the reinforcing bar (6) in described band reinforcement planting concrete test specimen (4) is positioned at band reinforcement planting concrete test specimen (4) middle part, align with band reinforcement planting concrete test specimen (4) in this reinforcing bar (6) bottom, and reinforcing bar (6) length 10 ~ 20mm highly larger than described band reinforcement planting concrete test specimen (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420624138.4U CN204177685U (en) | 2014-10-24 | 2014-10-24 | A kind of concrete reinforcement bond stress pick-up unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420624138.4U CN204177685U (en) | 2014-10-24 | 2014-10-24 | A kind of concrete reinforcement bond stress pick-up unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204177685U true CN204177685U (en) | 2015-02-25 |
Family
ID=52566490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420624138.4U Expired - Fee Related CN204177685U (en) | 2014-10-24 | 2014-10-24 | A kind of concrete reinforcement bond stress pick-up unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204177685U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588768A (en) * | 2014-10-24 | 2016-05-18 | 贵州中建建筑科研设计院有限公司 | Detection method and detection apparatus for bond stress between reinforcing steel bar and concrete |
| CN113607556A (en) * | 2021-07-08 | 2021-11-05 | 安徽省路桥试验检测有限公司 | Concrete reinforcement bond stress detection device and detection method |
-
2014
- 2014-10-24 CN CN201420624138.4U patent/CN204177685U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588768A (en) * | 2014-10-24 | 2016-05-18 | 贵州中建建筑科研设计院有限公司 | Detection method and detection apparatus for bond stress between reinforcing steel bar and concrete |
| CN113607556A (en) * | 2021-07-08 | 2021-11-05 | 安徽省路桥试验检测有限公司 | Concrete reinforcement bond stress detection device and detection method |
| CN113607556B (en) * | 2021-07-08 | 2024-02-20 | 安徽省路桥试验检测有限公司 | Device and method for detecting bond strength of concrete reinforcing steel bar |
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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: 20150225 Termination date: 20191024 |