CN206132590U - Inside testing arrangement that slides that bonds of reinforced concrete - Google Patents
Inside testing arrangement that slides that bonds of reinforced concrete Download PDFInfo
- Publication number
- CN206132590U CN206132590U CN201621163284.7U CN201621163284U CN206132590U CN 206132590 U CN206132590 U CN 206132590U CN 201621163284 U CN201621163284 U CN 201621163284U CN 206132590 U CN206132590 U CN 206132590U
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- China
- Prior art keywords
- concrete
- tensioning
- framework
- hydraulic pressure
- steel bar
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Abstract
The utility model discloses an inside testing arrangement that slides that bonds of reinforced concrete, including the servo testing machine of hydraulic pressure, with the servo testing machine of hydraulic pressure the supporting hydraulic pressure loader that uses, be fixed in under in the last stretch -draw frame on the stretch -draw frame of subaerial lower stretch -draw frame and suit, the concrete sample is placed on the underframe roof, and the stretch -draw reinforcing bar passes concrete sample, underframe roof and upper ledge rest base board in proper order to the anchor is on upper ledge rest base board. The utility model discloses compare the traditional test method, the operation is swift, and the method of utilizing the concrete to reserve the dead slot has been avoided destroying the fluting of reinforcing bar, has reduced the influence of performance of sliding that bonds to reinforced concrete, can directly obtain the displacement volume of the relative concrete sample surface with the concrete interface of reinforcing bar, and carry out simply calculating the bonding stress that can obtain the interface and locate through the displacement volume to the more accurate reinforced concrete constitutive relation that slides that bonds that obtains.
Description
【Technical field】
This utility model is related to a kind of armored concrete internal bond sliding test device.
【Background technology】
Bond-slip between reinforcing bar and concrete is the key areas of reinforced concrete structure nonlinear analyses, and bond-slip properties are tried
It is the important method for setting up armored concrete Bond-slip to test, and current test method mainly has pull, beam type
Test, center tension test, but due to cannot accurately obtain reinforcing bar and the strain at concrete interface so that current bond-slip
Constitutive relation is relatively coarse.Existing test sets up constitutive relation by surveying average bond stress and free end sliding magnitude relation,
Average bond stress and the relation of average slippage that this method is obtained, do not represent the bonding-slip relationship inside test specimen,
Or further by reinforcing bar slot paste foil gauge method measure reinforcement stresses, so as to end slippage opening relationships,
With respect to the former, it is relatively accurate that reinforcing bar fluting pastes description of the method for foil gauge to bond stress.With the further need of research
Will, strain gauge is buried in the concrete developed near reinforcing bar and two methods of foil gauge is pasted in concrete surface, survey respectively
The strain of reinforcing bar and concrete is obtained, the Bond-slip relevant with position, this two kinds of examinations are obtained by integral and calculating
Proved recipe method operating difficultiess, it is impossible to directly obtain interface concrete displacement, have destructiveness to the globality of reinforcing bar, and in reinforcing bar
Foil gauge easily fails.
【Utility model content】
The purpose of this utility model is the shortcoming for overcoming above-mentioned prior art, there is provided a kind of armored concrete internal bond
Sliding test device, so as to provide foundation to set up armored concrete Bond-slip.
To reach above-mentioned purpose, this utility model is employed the following technical solutions and is achieved：
A kind of armored concrete internal bond sliding test device, including hydraulic servo testing machine and hydraulic servo test
The matching used hydraulic pressure loading device of machine, the lower tensioning framework being fixed on ground and the upper tensioning being set on lower tensioning framework
Framework；Concrete sample is positioned on underframe top board, and tension reinforcing steel bar sequentially passes through concrete sample, underframe top board and upper ledge
Frame base plate, and be anchored on upper frame base plate.
This utility model is further improved by：
The loader position adjustment valve for adjusting hydraulic pressure loading device position is additionally provided with the hydraulic servo testing machine,
Hydraulic pressure loading device is set to be located at the ceiling center of upper tensioning framework.
Be additionally provided with the tension reinforcing steel bar it is some choose muscle, choose muscle and be welded on tension reinforcing steel bar and left a blank in advance by steel thimble
Groove stretches out from the surface of concrete sample.
It is further fixed on the tension reinforcing steel bar for measuring the adjacent displacement meter for choosing muscle displacement.
Upper frame perforation is opened up on the underframe top board of the lower tensioning framework, upper tensioning framework is by orientation slide cartridge and upper
Frame aperture is enclosed within underframe.
Tension reinforcing steel bar perforation is further opened with the underframe top board of the lower tensioning framework, tension reinforcing steel bar is worn by tension reinforcing steel bar
Hole passes.
The displacement for measuring tension reinforcing steel bar two ends displacement is provided between the underframe top board and upper frame base plate
Meter.
Compared with prior art, this utility model has the advantages that：
This utility model carries out tensioning to reinforcing bar by tensioning framework using hydraulic servo testing machine, and measures and tensioning steel
What muscle welded out chooses the displacement of muscle, wherein choose muscle reserves less dead slot, and displacement when test specimen is poured by steel bushing
Meter is fixed on concrete sample surface, so it is the accurate of reinforced concrete interface opposite concrete outer surface to measure displacement
Value, the strain of reinforcing bar is calculated by choosing muscle displacement, so as to release the size of interface bonding stress according to equilibrium relation, further
The relation between the displacement and bond stress at each measuring point is drawn, conventional test methods are compared, this method of testing is swift to operate,
The fluting to reinforcing bar is avoided using the method for the reserved dead slot of concrete to destroy, reduce to armored concrete bond-slip properties
Impact, the displacement of reinforcing bar and concrete interface opposite concrete test specimen outer surface can be directly obtained, and by displacement
The simple bond stress for calculating and interface being obtained is carried out, so as to more accurately obtain armored concrete bond-slip this structure
Relation.
【Description of the drawings】
Fig. 1 is assay device overall schematic；
Fig. 2 is test test specimen and displacement meter installation diagram；
Fig. 3 is tensioning framework structural facades figure；
Fig. 4 is underframe top board top view；
Fig. 5 is upper frame base plate top view.
Wherein：1- hydraulic servo testing machines；2- hydraulic pressure loading devices；The upper tensioning frameworks of 3-；Tensioning framework under 4-；5- concrete
Test specimen；6- chooses muscle；7- displacement meters；8- tension reinforcing steel bars；9- loader position adjustment valves；10- concrete surface spacer bars；11-
Steel bushing reserves dead slot；12- underframe top boards；13- upper frame base plates；14- orients slide cartridge；15- upper frames are bored a hole；16- tensioning
Reinforced steel bar perforation.
【Specific embodiment】
This utility model is described in further detail below in conjunction with the accompanying drawings：
Armored concrete internal bond sliding test device involved by this utility model is by hydraulic servo testing machine, tensioning
Framework, displacement meter 7, test test specimen composition；Test test specimen is fixed in tensioning framework, and by hydraulic servo testing machine tensioning is passed through
Framework carries out tensioning to reinforcing bar, and displacement meter 7 is fixed on concrete spacer bar 10 and measures chooses muscle with tension reinforcing steel bar welding
And the displacement at tension reinforcing steel bar two ends.
This utility model calculates interface bonding stress by measuring reinforced concrete interface displacement, so as to set up steel
Reinforced concrete Bond-slip provides foundation, and this utility model is described in further detail below in conjunction with the accompanying drawings：
Referring to Fig. 1 to Fig. 5, this utility model armored concrete internal bond sliding test device, including hydraulic servo examination
Machine 1 and supporting hydraulic pressure loading device 2 are tested, lower tensioning framework 4 is fixed on ground, and upper tensioning framework 3 is by orienting the He of slide cartridge 14
Upper frame perforation 15 is enclosed within underframe 4, and the bottom surface of concrete sample 5 is placed on underframe top board 12, and tension reinforcing steel bar 8 passes through tensioning
Reinforced steel bar perforation 16 is anchored on upper frame base plate 13, choose muscle 6 be welded on tension reinforcing steel bar 8 and by the reserved dead slot 11 of steel thimble from
Concrete surface is stretched, and loader is adjusted in frame head plate middle position by loader position adjustment valve 9, during loading,
By measuring tension reinforcing steel bar free end and stretching end and choosing the bond stress at the displacement reckoning reinforced concrete interface of muscle,
So as to set up armored concrete Bond-slip.
The purpose of this utility model is more accurately to obtain displacement and the bond stress at reinforced concrete interface, from
And be to set up armored concrete Bond-slip to provide safeguard, concrete method of testing is as follows：
1) test component in Fig. 2 is poured, muscle is chosen and is equidistantly welded on tension reinforcing steel bar, spacing is L0, bar diameter is
D, area of section is As, elastic modelling quantity is E, and free end length is L1, tension reinforcing steel bar overall length is L=5 × L0+L1。
2) the tensioning framework in Fig. 3 is assembled, and is fixed on the ground.
3) the test test specimen in Fig. 2 is arranged in tensioning framework, and tension reinforcing steel bar stretching end is anchored at into upper frame bottom
On plate.
4) pressure testing is carried out to framework and test specimen by hydraulic servo testing machine, according to the method shown in Fig. 1 and Fig. 2 after pressure testing
Displacement meter is installed.
5) loaded using hydraulic servo testing machine, test specimen reinforcing bar can be obtained from free end to tensioning by displacement meter
Displacement at the point of side is followed successively by S0,S1,S2,S3,S4,S5。
6) bond stress of concrete both ends of the surface boundary is zero, apart from concrete free end surface L0Name at/4
Bond stress isNominal bond stress at each measuring point is
Nominal stress at measuring point 4 isApart from concrete stretching end Surface L0Name at/4
Bond stress is
7) can be obtained in armored concrete according to the relation of the nominal bond stress at the premises and actual measurement slippage
S- τ curves at each measuring point in portion, to set up Bond-slip foundation is provided.
Above content is only to illustrate technological thought of the present utility model, it is impossible to limit protection model of the present utility model with this
Enclose, it is every according to the utility model proposes technological thought, any change done on the basis of technical scheme each falls within this reality
Within protection domain with new claims.
Claims (7)
1. a kind of armored concrete internal bond sliding test device, it is characterised in that including hydraulic servo testing machine (1) and
The matching used hydraulic pressure loading device (2) of hydraulic servo testing machine (1), the lower tensioning framework (4) being fixed on ground and suit
Upper tensioning framework (3) on lower tensioning framework (4)；Concrete sample (5) is positioned on underframe top board (12), tension reinforcing steel bar
(8) concrete sample (5), underframe top board (12) and upper frame base plate (13) are sequentially passed through, and is anchored in upper frame base plate
(13) on.
2. armored concrete internal bond sliding test device according to claim 1, it is characterised in that the hydraulic pressure is watched
Loader position adjustment valve (9) being additionally provided with testing machine (1) for adjusting hydraulic pressure loading device (2) position is taken, adds hydraulic pressure
Carry ceiling center of the device (2) positioned at upper tensioning framework (3).
3. armored concrete internal bond sliding test device according to claim 1, it is characterised in that the tensioning steel
Be additionally provided with muscle (8) it is some choose muscle (6), choose muscle (6) and be welded on tension reinforcing steel bar (8) and by the reserved dead slot (11) of steel thimble
Stretch out from the surface of concrete sample (5).
4. armored concrete internal bond sliding test device according to claim 3, it is characterised in that the tensioning steel
It is further fixed on muscle (8) for measuring the adjacent displacement meter (7) for choosing muscle (6) displacement.
5. armored concrete internal bond sliding test device according to claim 1, it is characterised in that the lower tensioning
Upper frame perforation (15) is opened up on the underframe top board (12) of framework (4), upper tensioning framework (3) is by orienting slide cartridge (14) and upper
Frame aperture (15) is enclosed within underframe (4).
6. armored concrete internal bond sliding test device according to claim 5, it is characterised in that the lower tensioning
Tension reinforcing steel bar perforation (16) is further opened with the underframe top board (12) of framework (4), tension reinforcing steel bar (8) is bored a hole by tension reinforcing steel bar
(16) pass.
7. armored concrete internal bond sliding test device according to claim 1, it is characterised in that the underframe
The displacement meter (7) for measuring tension reinforcing steel bar (8) two ends displacement is provided between top board (12) and upper frame base plate (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621163284.7U CN206132590U (en) | 2016-11-01 | 2016-11-01 | Inside testing arrangement that slides that bonds of reinforced concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621163284.7U CN206132590U (en) | 2016-11-01 | 2016-11-01 | Inside testing arrangement that slides that bonds of reinforced concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206132590U true CN206132590U (en) | 2017-04-26 |
Family
ID=58575777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621163284.7U Expired - Fee Related CN206132590U (en) | 2016-11-01 | 2016-11-01 | Inside testing arrangement that slides that bonds of reinforced concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206132590U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644930A (en) * | 2016-11-01 | 2017-05-10 | 长安大学 | Device and method for bonding slippage testing inside reinforced concrete |
| CN108760495A (en) * | 2018-05-31 | 2018-11-06 | 郑州大学 | The two-way tension adhesion test device of weak separation muscle material and test method |
| CN110530713A (en) * | 2019-07-18 | 2019-12-03 | 武汉大学 | Bolted Rock Masses sample and rock mass engineering project anchor mechanism pilot system |
| CN112504958A (en) * | 2020-10-15 | 2021-03-16 | 北京工业大学 | Testing device for reinforced concrete bonding slippage |
-
2016
- 2016-11-01 CN CN201621163284.7U patent/CN206132590U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644930A (en) * | 2016-11-01 | 2017-05-10 | 长安大学 | Device and method for bonding slippage testing inside reinforced concrete |
| CN106644930B (en) * | 2016-11-01 | 2023-04-21 | 长安大学 | Reinforced concrete internal bonding slip testing device and method |
| CN108760495A (en) * | 2018-05-31 | 2018-11-06 | 郑州大学 | The two-way tension adhesion test device of weak separation muscle material and test method |
| CN108760495B (en) * | 2018-05-31 | 2023-08-22 | 郑州大学 | Bidirectional tension bonding test device and test method for weak-rigidity rib |
| CN110530713A (en) * | 2019-07-18 | 2019-12-03 | 武汉大学 | Bolted Rock Masses sample and rock mass engineering project anchor mechanism pilot system |
| CN112504958A (en) * | 2020-10-15 | 2021-03-16 | 北京工业大学 | Testing device for reinforced concrete bonding slippage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20170426 Termination date: 20171101 |