CN108801906A - A kind of loading device and method for bond-slip properties experiment - Google Patents
A kind of loading device and method for bond-slip properties experiment Download PDFInfo
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- CN108801906A CN108801906A CN201810574150.1A CN201810574150A CN108801906A CN 108801906 A CN108801906 A CN 108801906A CN 201810574150 A CN201810574150 A CN 201810574150A CN 108801906 A CN108801906 A CN 108801906A
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- 238000011068 loading method Methods 0.000 title claims abstract description 55
- 238000002474 experimental method Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 100
- 238000009434 installation Methods 0.000 claims abstract description 47
- 238000004080 punching Methods 0.000 claims abstract description 40
- 230000003014 reinforcing effect Effects 0.000 claims description 62
- 238000006073 displacement reaction Methods 0.000 claims description 17
- 238000010304 firing Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 241001661355 Synapsis Species 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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- Life Sciences & Earth Sciences (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of loading devices and method for bond-slip properties experiment, including：Loading frame；Loading frame includes supporting leg, the first support plate, the second support plate and third support plate；First support plate, the second support plate and third support plate are fixed on supporting leg successively；Coaxial installation through-hole is offered in first support plate, the second support plate and third support plate；Punching flexural pivot is fixedly installed in first support plate, the centre bore of punching flexural pivot and the installation through-hole in the first support plate are coaxial；It is provided with the flexural pivot connecting rod of flexural pivot in the installation through-hole of third support plate, can be connected with the collet of testing machine by flexural pivot connecting rod.The loading device for bond-slip properties experiment of the present invention is by from that can carry out moment of flexure release in, can be improved the accuracy of bond-slip properties experiment.
Description
Technical field
The invention belongs to technical field of civil engineering or reinforcing bar and concrete binding slip property experimental study technical field,
More particularly to a kind of loading device and method for bond-slip properties experiment.
Background technology
Reinforcing bar can be worked together with concrete structure, can play the advantage of respective material, it is important to lean on reinforcing bar and coagulation
Cementation between soil, the method for measuring the cohesive force of reinforcing bar and concrete in practice generally use《Concrete structure tries
Test method standard》In the cube center that recommends extract test specimen.
For existing grip of testing machine, generally require to meet test machine clamping test specimen by experiment loading unit
Requirement, usually concrete center be embedded to reinforcing bar, be further applied load in one end of reinforcing bar, to measure reinforcing bar and concrete binding
Bond stress in energy and Relative sliding.Existing experiment loading unit generally existing generates curved when cannot discharge load connection
The problem of square, can cause bond-slip properties experiment accuracy to reduce；And existing loading device passes through loading device mostly
Frame carries out Indirect Loaded, and the intermediate loss of Indirect Loaded can reduce loading accuracy.
Invention content
The purpose of the present invention is to provide a kind of loading devices and method for bond-slip properties experiment, in solution
It states.The loading device for bond-slip properties experiment of the present invention in by that can carry out moment of flexure certainly
The accuracy of bond-slip properties experiment can be improved in release.
In order to achieve the above objectives, the present invention uses following technical scheme：
A kind of loading device for bond-slip properties experiment, including：Loading frame；Loading frame includes supporting leg,
One support plate, the second support plate and third support plate；First support plate, the second support plate and third support plate are fixedly installed successively
On supporting leg；Coaxial installation through-hole is offered in first support plate, the second support plate and third support plate；In first support plate
It is fixedly installed punching flexural pivot, the centre bore of punching flexural pivot and the installation through-hole in the first support plate are coaxial, and punching flexural pivot is located at
Between first support plate and the second support plate, the reinforcing bar of test specimen upper end can pass through the centre bore of punching flexural pivot to enter the first support
Installation through-hole on plate, the reinforcing bar of test specimen lower end can enter the installation through-hole of the second support plate；The installation of third support plate is logical
It is provided with the flexural pivot connecting rod of flexural pivot in hole, can be connected with the collet of testing machine by flexural pivot connecting rod.
Further, the lower end of punching flexural pivot is provided with caging bolt, and caging bolt is used to carry out the concrete of test specimen
Circumferential limit.
Further, it is provided with local reinforcing plate at the installation through-hole of third support plate.
Further, the homonymy of the first support plate and the second support plate is respectively arranged with gap, and gap passes through first respectively
Installation through-hole in support plate and the second support plate.
Further, supporting leg includes 4 screw rods；4 screw rods by nut and gasket respectively with the first support plate, second
Fagging is connected with third support plate.
Further, the lower end of the centre bore of punching flexural pivot is equipped with first support, and first is equipped in first support
Move meter.
Further, second support is installed at the installation through-hole of the second support plate, second is installed in second support
Move meter.
Further, further include test specimen and testing machine；Test specimen includes reinforcing bar and concrete, in reinforcing bar Transducers Embedded in Concrete, steel
Concrete is stretched out at the both ends of muscle, and the upper end of reinforcing bar is pierced by the centre bore of punching flexural pivot and installation through-hole and the examination of the first support plate
The upper jaw for testing machine is fixedly connected, and the lower end of reinforcing bar is stretched into the installation through-hole of the second support plate, the lower jaw of testing machine
It is fixedly connected with the flexural pivot connecting rod of third support plate.
A kind of loading method for bond-slip properties experiment, based on any above-mentioned loading device, test specimen includes
Reinforcing bar and concrete, in reinforcing bar Transducers Embedded in Concrete, concrete, including step in detail below are stretched out in the both ends of reinforcing bar：
Step 1, test specimen to be loaded is placed between the first support plate and the second support plate, the reinforcing bar of test specimen upper end stretches into
The centre bore of punching flexural pivot and be pierced by the first support plate installation through-hole and testing machine upper jaw connect, the steel of test specimen lower end
Muscle stretches into the mounting hole of the second support plate；
Step 2, the lower jaw of the flexural pivot connecting rod and testing machine installed in third support plate is connected；
Step 3, adjusting punching flexural pivot and flexural pivot connecting rod makes the reinforcing bar of test specimen and the upper jaw of testing machine and lower jaw
Centering；
Step 4, the first displacement meter is installed between punching flexural pivot and the concrete of test specimen, in the second support plate and test specimen
Second displacement meter is installed between concrete；
Step 5, firing test machine is loaded.
Compared with prior art, the present invention has the following advantages：
The loading device for bond-slip properties experiment of the present invention, test specimen to be loaded are placed on the first support plate and the
Between two support plates, the reinforcing bar of test specimen upper end stretches into the centre bore of punching flexural pivot and is pierced by the installation through-hole of the first support plate, examination
The reinforcing bar of part lower end stretches into the installation through-hole of the second support plate, and flexural pivot connecting rod is equipped in the installation through-hole of third support plate, the
The same shaft assignment of installation through-hole of one support plate, the second support plate and third support plate, by adjusting punching flexural pivot and flexural pivot connecting rod
The collet centering that can make the reinforcing bar and testing machine of test specimen to be loaded can discharge the moment of flexure generated due to bias, can be improved and add
The accuracy of load improves the precision and reliability of experiment.And the more traditional loading device of this experiment loading unit test specimen by
In power more directly, reduce the loss that testing machine is further applied load to test specimen by loading device, keep test specimen stress more direct.
Further, centering can effectively be adjusted by caging bolt, prevents from generating in load due to test specimen bias attached
Add moment of flexure.
Further, by the way that local reinforcing plate is arranged at the installation through-hole of third support plate, can enhance at installation through-hole
Intensity, avoid third support plate in load the reinforcing bar of deformation effect test specimen with experiment machine grip holder to neutrality, further protect
Demonstrate,prove the accuracy of load.
Further, the homonymy of the first support plate, punching flexural pivot and the second support plate is provided with gap, can by gap
Test specimen is more easily put into loading device, is easily installed, loading efficiency can be improved.
Further, supporting leg uses screw rod, begins with threaded connection hole in each support plate, screw rod passes through nut and pad
Piece is connected with threaded connection hole, is easily installed, and also allows for adjusting the distance between each support plate according to actual needs, can carry
The scope of application of high loading device.
Further, the first displacement meter is used to measure the relative displacement between load end bar and concrete.
Further, second displacement meter is used to measure the relative displacement between free end bar and concrete.
The loading method of the present invention can be used for the load of bond-slip properties experiment, and simple operation, loading efficiency is high, application
It is higher to neutrality that the loading method of the loading device of the present invention can ensure that test specimen reinforcing bar and experiment machine grip holder have, releasable inclined
The moment of flexure that the heart generates, load accuracy are higher.
Description of the drawings
Fig. 1 is a kind of overall structure diagram of loading device for bond-slip properties experiment of the present invention；
Fig. 2 is the overlooking structure diagram of Fig. 1；
Fig. 3 is the overlooking structure diagram of the first support plate in Fig. 1；
Fig. 4 is the positive structure diagram of the punching flexural pivot in Fig. 1；
Fig. 5 is the overlooking structure diagram of Fig. 4；
Fig. 6 is the overlooking structure diagram of the second support plate in Fig. 1；
Fig. 7 is the positive structure diagram of the local reinforcing plate in Fig. 1；
Fig. 8 is the overlooking structure diagram of Fig. 7；
Fig. 9 is the overlooking structure diagram of the third support plate in Fig. 1；
Figure 10 is the positive structure diagram of flexural pivot connecting rod in Fig. 1；
Figure 11 is the overlooking structure diagram of Figure 10；
Figure 12 is the configuration schematic diagram that flexural pivot connecting rod, local reinforcing plate are connected with third support plate；
In Fig. 1 to Figure 12,1-reinforcing bar, 2-screw rods, 3-nuts, the 4-the first support plate, 5-connection bolts, 6-punchings
Flexural pivot, 7-caging bolts, the 8-the first displacement meter, 9-concrete test blocks, the 10-the second support plate, 11-second displacement meters,
12-local reinforcing plates, 13-third support plates, 14-flexural pivot connecting rods.
Specific implementation mode
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
Referring to figs. 1 to Figure 12, a kind of loading device for bond-slip properties experiment of the invention, including：Load frame
Frame, test specimen and testing machine.
Loading frame includes supporting leg, the first support plate 4, the second support plate 10 and third support plate 13, the first support plate 4,
Second support plate 10 and third support plate 13 are fixed on supporting leg successively；Supporting leg is 4 screw rods 2, and three support plates are
Rectangular steel plates, nearby correspondence offers coaxial threaded mounting hole respectively for the quadrangle of three support plates, and screw rod 2 is separately mounted to spiral shell
It is fixedly connected in line mounting hole and by nut 3 and gasket, using screw rod 2 as supporting leg convenient for according to the length tune of test specimen
The spacing between the first support plate 4 and the second support plate 10 is saved, it is easy to operation, help to improve the scope of application of loading device.
Coaxial installation through-hole is offered in first support plate 4, the second support plate 10 and third support plate 13；The peace of first support plate 4
Dress through hole is fixedly installed punching flexural pivot 6, and the centre bore of punching flexural pivot 6 and the installation through-hole in the first support plate 4 are coaxial, wear
Bulbus cordis hinge 6 is between the first support plate 4 and the second support plate 10, by the release of punching flexural pivot 6 due to the moment of flexure of bias generation；
Specially 6 top of punching flexural pivot is connect by connecting bolt 5 with the first support plate 4, and lower part is across reinforcing bar 1, the pass-out always of reinforcing bar 1
The top of punching flexural pivot 6, reinforcing bar 1 pass through male and female face center；When reinforcing bar 1 is connected with the upper jaw of testing machine, connecting line is non-flat
When 1 axis of reinforcing bar, minor rotation occurs row for the reinforcing bar 1 that test specimen can be adjusted by punching flexural pivot 6, and punching flexural pivot 6 can rise
The effect that centering is adjusted to test specimen can discharge the moment of flexure of eccentric generation, improve loading accuracy.The reinforcing bar 1 of test specimen upper end can
Enter the installation through-hole in the first support plate 4 across the centre bore of punching flexural pivot 6, the reinforcing bar 1 of test specimen lower end can enter second
The bottom of the installation through-hole of support plate 10, the concrete test block 9 of test specimen is shelved in the second support plate 10, and the second support plate 10 is put
Set 1 concrete binding test specimen of reinforcing bar；The lower end of punching flexural pivot 6 is provided with caging bolt 7, and caging bolt 7 is used to try concrete
Block 9 carries out circumferential limit, prevents the concrete test block 9 in loading procedure from circumferential movement occurs.First support plate 4 and second supports
The homonymy of plate 10 is respectively arranged with gap, and gap passes through the installation through-hole in the first support plate 4 and the second support plate 10, examination respectively
The reinforcing bar 1 of part can be directly placed into from opening position, be convenient for the placement of test specimen.The lower end of the centre bore of punching flexural pivot 6 connects with test specimen
Synapsis is equipped with first support, and the first displacement meter 8 is equipped in first support.It is equipped at the installation through-hole of second support plate 10
Second support is equipped with second displacement meter 11 in second support.Pacify at punching flexural pivot 6 and the installation through-hole of the second support plate 10
Displacement meter is filled, can measure the Relative sliding of free end and loading end, easy for installation, test specimen is conveniently operated.
The flexural pivot connecting rod 14 of flexural pivot is provided in the installation through-hole of third support plate 13, it can be with by flexural pivot connecting rod 14
The collet of testing machine is connected, and minor rotation can occur between flexural pivot connecting rod 14 and the installation through-hole of third support plate 13, such as
Fruit flexural pivot connecting rod 14 and experiment machine grip holder are non-parallel, will be between flexural pivot and flexural pivot connecting rod 14 and the installation through-hole of third support plate 13
Progress minor rotation can discharge non-be centered in and load generated moment of flexure on equipment, and flexural pivot connecting rod 14 can play adjusting centering
Discharge the effect of moment of flexure.Local reinforcing plate 12 is provided at the installation through-hole of third support plate 13, local reinforcing plate 12 can add
Intensity at the installation through-hole of strong third support plate 13, avoids third support plate 13 from deforming in loading procedure.
Test specimen includes reinforcing bar 1 and concrete test block 9, and in 1 Transducers Embedded in Concrete test block 9 of reinforcing bar, the both ends of reinforcing bar 1, which are stretched out, mixes
Solidifying soil test block 9, the upper end of reinforcing bar 1 are pierced by the upper of the centre bore of punching flexural pivot 6 and the installation through-hole of the first support plate 4 and testing machine
Portion's collet is fixedly connected, and the lower end of reinforcing bar 1 is stretched into the installation through-hole of the second support plate 10, the lower jaw and third of testing machine
The flexural pivot connecting rod 14 of support plate 13 is fixedly connected.
A kind of loading method for bond-slip properties experiment based on above-mentioned loading device, including walks in detail below
Suddenly：
Step 1, three pieces of support plates and screw rod 2 are effectively connected into loading frame, punching flexural pivot 6 by nut 3 and gasket
Top is connected with the first support plate 4 by connecting bolt 5；
Step 2, test specimen to be loaded is placed between the first support plate 4 and the second support plate 10, the reinforcing bar 1 of test specimen upper end
The upper jaw of the installation through-hole and testing machine that stretch into the centre bore of punching flexural pivot 6 and be pierced by the first support plate 4 connects, under test specimen
The reinforcing bar 1 at end stretches into the mounting hole of the second support plate 10；
Step 3, the flexural pivot connecting rod 14 installed in third support plate 13 is connect with the lower jaw of testing machine；
Step 4, adjusting punching flexural pivot 6 and flexural pivot connecting rod 14 makes the reinforcing bar 1 of test specimen and the upper jaw of testing machine and lower part
Collet centering avoids generating eccentric；
Step 5, the first displacement meter 8 is installed between punching flexural pivot 6 and the concrete test block 9 of test specimen, in the second support plate
Second displacement meter 11 is installed between 10 and the concrete test block 9 of test specimen, and adjusts what corresponding position was measured until meeting experiment
It is required that；
Step 6, firing test machine is loaded, including testing machine load is zeroed, and eliminates loading device, test specimen and position
Move the weight of the devices such as meter.
Step 7, loading procedure carries out bond-slip experiment according to code requirement.
Claims (9)
1. a kind of loading device for bond-slip properties experiment, which is characterized in that including：Loading frame；
Loading frame includes supporting leg, the first support plate (4), the second support plate (10) and third support plate (13)；First support plate
(4), the second support plate (10) and third support plate (13) are fixed on supporting leg successively；First support plate (4), the second support
Coaxial installation through-hole is offered in plate (10) and third support plate (13)；First support plate is fixedly installed Perforative ball on (4)
It cuts with scissors (6), the centre bore and the installation through-hole in the first support plate (4) of punching flexural pivot (6) are coaxial, and punching flexural pivot (6) is located at first
Between support plate (4) and the second support plate (10), the reinforcing bar (1) of test specimen upper end can pass through the centre bore of punching flexural pivot (6) into
Enter the installation through-hole in the first support plate (4), the reinforcing bar (1) of test specimen lower end can lead into the installation of the second support plate (10)
Hole；The flexural pivot connecting rod (14) of flexural pivot is provided in the installation through-hole of third support plate (13), it can by flexural pivot connecting rod (14)
It is connected with the collet of testing machine.
2. a kind of loading device for bond-slip properties experiment according to claim 1, which is characterized in that Perforative ball
The lower end of hinge (6) is provided with caging bolt (7), and caging bolt (7) is used to carry out circumferential limit to concrete test block (9).
3. a kind of loading device for bond-slip properties experiment according to claim 1, which is characterized in that third branch
Local reinforcing plate (12) is provided at the installation through-hole of fagging (13).
4. a kind of loading device for bond-slip properties experiment according to claim 1, which is characterized in that first
Fagging (4) and the homonymy of the second support plate (10) are respectively arranged with gap, and gap passes through the first support plate (4) and second respectively
Installation through-hole on fagging (10).
5. a kind of loading device for bond-slip properties experiment according to claim 1, which is characterized in that supporting leg packet
Include 4 screw rods (2)；4 screw rods (2) by nut (3) and gasket respectively with the first support plate (4), the second support plate (10) and
Third support plate (13) is fixedly connected.
6. a kind of loading device for bond-slip properties experiment according to claim 1, which is characterized in that Perforative ball
The lower end for cutting with scissors the centre bore of (6) is equipped with first support, and the first displacement meter (8) is equipped in first support.
7. a kind of loading device for bond-slip properties experiment according to claim 1, which is characterized in that second
Second support is installed at the installation through-hole of fagging (10), second displacement meter (11) is installed in second support.
8. a kind of loading device for bond-slip properties experiment according to claim 1, which is characterized in that further include
Test specimen and testing machine；Test specimen includes reinforcing bar (1) and concrete test block (9), in reinforcing bar (1) Transducers Embedded in Concrete test block (9), reinforcing bar
(1) concrete test block (9) is stretched out at both ends, and the upper end of reinforcing bar (1) is pierced by the centre bore and the first support plate of punching flexural pivot (6)
(4) installation through-hole is fixedly connected with the upper jaw of testing machine, and the installation of the second support plate (10) is stretched into the lower end of reinforcing bar (1)
In through-hole, the lower jaw of testing machine is fixedly connected with the flexural pivot connecting rod (14) of third support plate (13).
9. a kind of loading method for bond-slip properties experiment, which is characterized in that based on any one of claim 1 to 8
The loading device, test specimen to be loaded include reinforcing bar (1) and concrete test block (9), reinforcing bar (1) Transducers Embedded in Concrete test block
(9) in, concrete test block (9) is stretched out at the both ends of reinforcing bar (1), specifically includes following steps：
Step 1, test specimen to be loaded is placed between the first support plate (4) and the second support plate (10), the reinforcing bar of test specimen upper end
(1) upper jaw of the installation through-hole and testing machine that stretch into the centre bore of punching flexural pivot (6) and be pierced by the first support plate (4) connects
It connects, the reinforcing bar (1) of test specimen lower end stretches into the mounting hole of the second support plate (10)；
Step 2, the flexural pivot connecting rod (14) installed in third support plate (13) is connect with the lower jaw of testing machine；
Step 3, adjust punching flexural pivot (6) and flexural pivot connecting rod (14) make the reinforcing bar (1) of test specimen and the upper jaw of testing machine and under
Portion's collet centering；
Step 4, the first displacement meter (8) is installed between the concrete of test specimen in punching flexural pivot (6), the second support plate (10) with
Second displacement meter (11) is installed between the concrete of test specimen；
Step 5, firing test machine is loaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810574150.1A CN108801906B (en) | 2018-06-05 | Loading device and method for bonding slip performance test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810574150.1A CN108801906B (en) | 2018-06-05 | Loading device and method for bonding slip performance test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108801906A true CN108801906A (en) | 2018-11-13 |
| CN108801906B CN108801906B (en) | 2024-07-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110132840A (en) * | 2019-05-08 | 2019-08-16 | 浙江省交通规划设计研究院有限公司 | Profiled sheet and concrete horizontal based on self-balancing principle bond force measuring device |
| CN111751275A (en) * | 2020-07-29 | 2020-10-09 | 宁波大学 | Sliding push-out test device and method for bonding performance of profile steel and confined concrete |
| CN111751276A (en) * | 2020-07-29 | 2020-10-09 | 宁波大学 | Loading device and method for bonding performance test of reinforcement and confined concrete |
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| CN110132840A (en) * | 2019-05-08 | 2019-08-16 | 浙江省交通规划设计研究院有限公司 | Profiled sheet and concrete horizontal based on self-balancing principle bond force measuring device |
| CN110132840B (en) * | 2019-05-08 | 2021-10-22 | 浙江数智交院科技股份有限公司 | Profiled steel sheet and concrete horizontal binding power measuring device based on self-balancing principle |
| CN111751275A (en) * | 2020-07-29 | 2020-10-09 | 宁波大学 | Sliding push-out test device and method for bonding performance of profile steel and confined concrete |
| CN111751276A (en) * | 2020-07-29 | 2020-10-09 | 宁波大学 | Loading device and method for bonding performance test of reinforcement and confined concrete |
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