CN106124312A - The performance testing device of reinforcing bar and concrete and method - Google Patents
The performance testing device of reinforcing bar and concrete and method Download PDFInfo
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- CN106124312A CN106124312A CN201610387067.4A CN201610387067A CN106124312A CN 106124312 A CN106124312 A CN 106124312A CN 201610387067 A CN201610387067 A CN 201610387067A CN 106124312 A CN106124312 A CN 106124312A
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- leading screw
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- reinforcing bar
- loading frame
- pressure head
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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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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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- General Physics & Mathematics (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of reinforcing bar and the performance testing device of concrete and method thereof.The inventive system comprises tensile test district and stress test district.Tensile test district can carry out the center pull-out test of reinforcing bar and Bond Performance Between Concrete；Stress test district can carry out the Mechanics Performance Testing of concrete test block and beam.Apparatus and method of the present invention uses both sides leading screw to carry out the structure loaded, and is possible to prevent to use conventional equipment to carry out the appearance of the eccentric breakoff phenomenon of reinforcing bar during the pull-out test of center, can eliminate hydraulic jack off-load phenomenon.
Description
Technical field
The present invention relates to a kind of reinforcing bar and the performance testing device of concrete and method, especially relate to a kind of architectural engineering
The reinforcing bar in field and the performance testing device of concrete and method.
Background technology
At building engineering field, reinforcing bar and concrete are modal bi-materials, and its respective performance is viscous with theirs
The quality of knot performance directly affects the construction quality of architectural engineering.Adhesive property currently for reinforcing bar with concrete is tested, and one
As use center drawing method of testing.The method uses the loading method of single-ended drawing, and carries out on omnipotent test machine.
Test is smoothed out for convenience, is placed on by test specimen in a specific fixture during test, this fixture by top panel, lower shoe and
Four steel rider compositions, four steel rider upper and lower end parts are threaded, and it are connected with top panel, lower shoe with nut, the most also
It is easy to the handling of test specimen.But, the method has a problem in that: four steel riders are after repeatedly test, it may appear that in various degree
Relaxation, causes test specimen generation eccentric tension tear occur.
Beam type method of testing uses Manual hydraulic jack, distribution crossbeam asymmetrical load, and hydraulic jack top connects pressure
Force transducer is in order to test the load being applied to distribute crossbeam.Close for the ease of analyzing the bond-slip after reinforcing bar produces sliding
System, this method of testing uses first load, the scheme of rear displacement method controlled loading.The loading initial stage according to load controlled loading, when
End reinforced occur after sliding (i.e. beam both sides free end sliding) according to Relative sliding controlled loading.When a side member bond-slip
After destruction or sliding reach specified value, whole test terminates.But, the method has a problem in that: hydraulic jack exists unloads
Lotus phenomenon (i.e. load reduction phenomenon), especially load is the biggest, and off-load is the fastest.Additionally, Manual hydraulic jack loads is difficult to essence
Really controlled loading value, holding the lotus time is the most relatively difficult to ensure card.
Therefore, at present in the urgent need to performance testing device and the method for a kind of reinforcing bar and concrete, it can accomplish that a machine is many
Can, and be possible to prevent to use conventional equipment to carry out the appearance of the eccentric breakoff phenomenon of reinforcing bar during the pull-out test of center.Additionally, its
It is preferably able to eliminate hydraulic jack off-load phenomenon, it is possible to the problem solving the usable floor area deficiency that laboratory generally exists.
Summary of the invention
An object of the present invention is the performance testing device providing a kind of reinforcing bar with concrete, and it is one-machine-multi-function,
And it is possible to prevent to use conventional equipment to carry out the appearance of the eccentric breakoff phenomenon of reinforcing bar during the pull-out test of center.The present invention enters
One step purpose is the performance testing device providing a kind of reinforcing bar with concrete, and it can eliminate hydraulic jack off-load phenomenon,
And the floor space of device can be reduced.
Another object of the present invention is to the performance test methods providing a kind of reinforcing bar with concrete, it can test reinforcing bar
Multiple performance with concrete.
The application finds that following technical scheme can realize above-mentioned purpose.
The present invention provides the performance testing device of a kind of reinforcing bar and concrete, including upper beam, the first support rod, the second supporting
Bar, claw, upper pressure head, lower pressure head, the first leading screw, the second leading screw, loading frame and base；
Wherein, described upper beam, the first support rod, the second support rod detachably connected with base become frame-shaped；
Wherein, the first leading screw and the second leading screw are all connected with described upper beam and described base via bearing, the first leading screw and
Second leading screw all can rotate；
Wherein, described loading frame is removably sleeved on the first leading screw and the second leading screw, and be arranged on described upper beam and
Position between described base, is used for stretching or compress sample to be tested；Described loading frame is set to along with the first leading screw and
Two leading screws rotate and move up and down；
Wherein, between described loading frame and described upper beam, it is set to tensile test district, for testing drawing of sample to be tested
Stretch performance；Stress test district it is set to, for testing the compression performance of sample to be tested between described loading frame and described base；
Wherein, described claw is detachably connected on described upper beam, is used for fixing sample to be tested；With
Wherein, described upper pressure head is fixedly connected on the lower section of described loading frame；Described lower pressure head is fixedly connected on institute
State on base, and be arranged on the vertical lower of described upper pressure head；Described upper pressure head and described lower pressure head cooperate,
For fixing sample to be tested.
In the present invention, described upper beam, the first support rod, the second support rod detachably connected with base become frame-shaped, example
Such as frame structure.First support rod, the second support rod are fixed with upper beam, base respectively and are connected to form a scaffold.Gu
The fixed mode connected is not particularly limited, such as, can be that bolt connects or snaps connection.
In the present invention, the first leading screw and the second leading screw are all connected with described upper beam and described base via bearing, and first
Leading screw and the second leading screw all can rotate.According to a specific embodiment of the present invention, the first leading screw and the second leading screw pass through
Motor drives and realizes rotating.So can eliminate hydraulic jack and there is off-load phenomenon, there is not hand-hydraulic very heavy simultaneously
Top loads and is difficult to accurate controlled loading value and holds the problem that the lotus time is the most relatively difficult to ensure card.In the present invention, described motor-driven
The kind of drive is speed reducer drive.So can more accurately control rotating speed, and accurately control torque.The deceleration of the present invention
The power situation that machine can load as required is suitably selected.
According to assembly of the invention, it is preferable that first leading screw of the present invention, the second leading screw can be screw rod or ball wire
Thick stick, more preferably ball-screw.In the present invention, the distance between the first described leading screw and the second leading screw can be 300～
700mm, preferably 400～600mm；The first described leading screw and the length of the second leading screw can be 2000～3000mm, excellent
Elect 2300～2700mm as.
In the present invention, as long as force request can be met, the concrete kind of the bearing of the present invention is not especially limited.As
Preferably, the bearing of the present invention can be journal bearing or axial thrust bearing, preferably journal bearing.
In the present invention, described loading frame is removably sleeved on the first leading screw and the second leading screw, and is arranged on described
Position between upper beam and described base.The loading frame of the present invention is set to along with the first leading screw and the rotation of the second leading screw upper and lower
Mobile, it is used for stretching or compress sample to be tested.The two ends of described loading frame are respectively arranged with the first perforate and the second perforate,
First leading screw and the second leading screw respectively penetrate the first perforate and the second perforate, thus complete suit.Along with the first leading screw and second
The rotation of leading screw, the loading frame of the present invention can produce displacement therewith.Such structure can use well known in the art those,
Here repeat no more.
In the present invention, between described loading frame and described upper beam, it is set to tensile test district, is used for testing sample to be tested
The tensile property of product；Stress test district it is set to, for testing the pressure of sample to be tested between described loading frame and described base
Contracting performance.So, assembly of the invention both can test the adhesive property of reinforcing bar and concrete, it is also possible to the power of test concrete
Learn performance.In the present invention, tensile test district can be the region surrounded by loading frame, upper beam, the first leading screw and the second leading screw；
Stress test district can be the region surrounded by loading frame, base, the first leading screw and the second leading screw.Sample to be tested is in above-mentioned district
Complete in territory to test accordingly.
According to assembly of the invention, it is preferable that described device also includes semi-open type fixture, it is detachably connected to institute
State the top of loading frame, be used for fixing sample to be tested.Detachably connected mode is not particularly limited, such as, can be
Bolt connects, threaded or snap connection.According to a specific embodiment of the present invention, described semi-open type fixture is permissible
Selected from the box structure above with open design.Open design is advantageous in that can substantially observe sample to be tested in test
The metamorphosis of process.The box structure of the present invention is not restricted to square box, as long as it can accommodate and fix to be tested
Sample, such as, can be irregular polygonal bins.As preferably, the box structure of the present invention can be rectangular
Box structure.The semi-open type fixture of the present invention can include top panel, lower panel, left panel, right panel and rear board.Due to for
The box structure of the present invention has open design, and front panel can omit, it would however also be possible to employ with open design (such as perforate)
Front panel.The top panel of the present invention offers the opening passed for reinforcing bar, described lower panel be detachably connected to described in add
On carrier.In the present invention, shape and the detachably connected mode of opening is not particularly limited.
According to assembly of the invention, it is preferable that phase between top panel and the lower end of described claw of described semi-open type fixture
Maximum normal distance to motion is 1000～1500mm, preferably 1200～1350mm.Above-mentioned maximum normal distance is the most also
Referred to as effectively stretch space.Maximum normal distance being controlled in above-mentioned scope, beneficially Accurate Determining reinforcing bar glues with concrete
Knot performance.
The present invention also provides for the method utilizing said apparatus to carry out reinforcing bar and testing concrete performance, described method include with
Lower step:
(1) the center pull-out test of reinforcing bar and Bond Performance Between Concrete: using reinforcing bar with concrete sample as described to be measured
Test agent is placed in described semi-open type fixture, and the upper end of described reinforcing bar with concrete sample is used the clamping of described claw
Live, rotate the first leading screw and the second leading screw so that described loading frame moves down, drive described semi-open type fixture to add downwards simultaneously
Carry, thus test reinforcing bar and Bond Performance Between Concrete；
(2) Mechanics Performance Testing of concrete: concrete sample is placed on upper pressure head as described sample to be tested
And between lower pressure head, rotate the first leading screw and the second leading screw so that described loading frame moves down, drive described top simultaneously
Pressure head loads downwards, thus tests the mechanical property of concrete.
In the present invention, described " loading " represents the loading of load.
In the present invention, the operation order of described step (1) and step (2) is selected from one of following sequence: A, first carries out
Step (1), after carry out step (2)；B, first carry out step (2), after carry out step (1)；C, step (1) and step (2) are entered simultaneously
OK.According to a specific embodiment of the present invention, the operation order C in order of described step (1) and step (2) enters
OK, so can measure adhesive property and mechanical property simultaneously.
In test process, in order to improve testing efficiency and ensure data accuracy, the rate of displacement precision of loading frame
Controlling as follows: when (1) rate of displacement is below 1mm/min, precision controlling, at ± 0.005mm/min, is preferably ± 0.002mm/
min；(2) rate of displacement more than 1mm/min time, precision controlling displacement rate setpoints ± 0.5%, be preferably ± 0.2%
Within.
Additionally, use the said apparatus of the present invention can also carry out other tests of reinforcing bar and testing concrete performance.Example
As, Reinforcing bar clamp is installed after being dismantled by loading frame and just can carry out the Mechanics Performance Testing of reinforcing bar in tensile test district.And for example, exist
The beam of reinforcing bar and Bond Performance Between Concrete is can be carried out after the bearing of stress test district installation reinforcing bar and concrete test beam
Formula is tested.
Apparatus and method of the present invention uses both sides leading screw to carry out the structure loaded, and is possible to prevent to use conventional equipment to carry out
The appearance of the eccentric breakoff phenomenon of reinforcing bar during the pull-out test of center, can eliminate hydraulic jack off-load phenomenon.The dress of the present invention
Put and be divided into tensile test district and stress test district, the multiple performance of reinforcing bar and concrete can be tested；And many parts have
Detachable function, thus a tractor serves several purposes can be realized.According to currently preferred technical scheme, motor is used to drive leading screw rotation
Turn, and drive loading frame to move, when it can solve the very difficult accurate controlled loading value of Manual hydraulic jack loading and hold lotus
Between be the most relatively difficult to ensure the problem of card.Additionally, assembly of the invention floor space is little, the problem that laboratory is crowded can be solved.
Accompanying drawing explanation
Fig. 1 is a kind of reinforcing bar overall structure schematic diagram with the performance testing device of concrete of the present invention.
Description of reference numerals:
1-upper beam；21-the first support rod；22-the second support rod；3-claw；41-the first leading screw；42-the second leading screw；5-
Loading frame；6-base；7-semi-open type fixture；81-upper pressure head；82-lower pressure head；A-tensile test district；B-stress test district.
Detailed description of the invention
The present invention is further illustrated with specific embodiment below in conjunction with the accompanying drawings, but protection scope of the present invention is not
It is limited to this.
Embodiment 1
Fig. 1 is a kind of reinforcing bar overall structure schematic diagram with the performance testing device of concrete of the present invention.Such as Fig. 1 institute
Show, the inventive system comprises upper beam the 1, first support rod the 21, second support rod 22, claw the 3, first leading screw the 41, second leading screw
42, loading frame 5, base 6, wherein, upper beam the 1, first support rod the 21, second support rod 22 detachably connected with base 6 become frame
Shape, claw 3 is detachably connected on upper beam 1, first leading screw the 41, second leading screw 42 via bearing (not shown) and upper beam 1 and
Base 6 connects and is driven by motor (not shown) and rotate, and loading frame 5 is removably sleeved on the first leading screw 41, second
On thick stick 42, when first leading screw the 41, second leading screw 42 rotates, loading frame 5 moves up and down and completes to load.First leading screw and second
Distance between thick stick is 580mm.
Upper beam the 1, first leading screw the 41, second leading screw 42 and loading frame 5 surround tensile test district A, and it is positioned at reinforcing bar and coagulation
The top of the performance testing device of soil.Base the 6, first leading screw the 41, second leading screw 42 and loading frame 5 surround stress test district B, its
It is positioned at the bottom of reinforcing bar and the performance testing device of concrete.The motor-driven kind of drive in embodiment 1 is that reductor passes
Dynamic；First leading screw the 41, second leading screw 42 is ball-screw；Bearing is journal bearing.
Assembly of the invention also includes semi-open type fixture 7, and it is detachably connected on loading frame 5.Semi-open type fixture 7 is
Being above the box structure of open design, it includes top panel, lower panel, left panel, right panel and rear board, do not comprise before
Plate；Described top panel offers the opening passed for reinforcing bar, and described lower panel is detachably connected on described loading frame 5.Half
Between top panel and the lower end of described claw 3 of open type fixture 7, the maximum normal distance of relative motion is 1300mm.
Assembly of the invention also includes upper pressure head 81, lower pressure head 82.Upper pressure head 81 is fixedly connected on described loading
The lower section of frame 5；Lower pressure head 82 is fixedly connected on described base 6, and is arranged on the vertical lower of upper pressure head 81；Top
Pressure head 81 and lower pressure head 82 cooperate, and are used for fixing sample to be tested.
The method using said apparatus to carry out performance test in turn includes the following steps:
(1) the center pull-out test of reinforcing bar and Bond Performance Between Concrete: using reinforcing bar with concrete sample as described to be measured
Test agent is placed in semi-open type fixture 7, uses claw 3 to clamp the upper end of reinforcing bar with concrete sample, rotates first
Leading screw 21 and the second leading screw 22, so that loading frame 5 moves down, drive semi-open type fixture 7 to load downwards simultaneously, thus tested steel
Muscle and Bond Performance Between Concrete；
(2) Mechanics Performance Testing of concrete: concrete sample is placed on upper pressure head as described sample to be tested
Between 81 and lower pressure head 82, rotate the first leading screw 21 and the second leading screw 22 so that loading frame 5 moves down, drive top simultaneously
Pressure head 81 loads downwards, thus tests the mechanical property of concrete.
In test process, in order to improve testing efficiency and ensure data accuracy, the rate of displacement precision of loading frame 5
Control as follows: when (1) rate of displacement is below 1mm/min, precision controlling is at ± 0.005mm/min；(2) rate of displacement is more than
During 1mm/min, precision controlling displacement rate setpoints ± 0.5%.
Embodiment 2
In addition to first leading screw the 41, second leading screw 42 in embodiment 1 is replaced with screw rod by ball-screw, its remaining part
Part and parameter are same as in Example 1.
Embodiment 3
In addition to the bearing in embodiment 1 is replaced with axial thrust bearing by journal bearing, remaining part and parameter
Same as in Example 1.
Embodiment 4
In addition to the semi-open type fixture 7 in embodiment 1 is replaced with following structure, remaining part and parameter and embodiment
1 is identical:
Semi-open type fixture 7 is selected from being above the box structure of open design, and it includes top panel, lower panel, left panel, the right side
Panel, rear board and the front panel with perforate；Described top panel offers the opening passed for reinforcing bar, and described lower panel is removable
It is connected to unloading on described loading frame 5.
Embodiment 5
In addition to the sequencing of the step (1) in embodiment 1 and (2) is replaced with step (2), (1), remaining part
Same as in Example 1 with parameter.
Embodiment 6
In addition to the order of the step (1) in embodiment 1 and (2) being replaced with step (1) and (2) carried out simultaneously, its
Remaining part part and parameter are same as in Example 1.
In the case of without departing substantially from the flesh and blood of the present invention, any deformation that it may occur to persons skilled in the art that, change
Enter, replace and each fall within the scope of the present invention.
Claims (10)
1. a reinforcing bar and the performance testing device of concrete, it is characterised in that:
Described device include upper beam, the first support rod, the second support rod, claw, upper pressure head, lower pressure head, the first leading screw,
Two leading screws, loading frame and base；
Wherein, described upper beam, the first support rod, the second support rod detachably connected with base become frame-shaped；
Wherein, the first leading screw and the second leading screw are all connected with described upper beam and described base via bearing, the first leading screw and second
Leading screw all can rotate；
Wherein, described loading frame is removably sleeved on the first leading screw and the second leading screw, and is arranged on described upper beam and described
Position between base, is used for stretching or compress sample to be tested；Described loading frame is set to along with the first leading screw and second
Thick stick rotates and moves up and down；
Wherein, between described loading frame and described upper beam, it is set to tensile test district, for testing the draftability of sample to be tested
Energy；Stress test district it is set to, for testing the compression performance of sample to be tested between described loading frame and described base；
Wherein, described claw is detachably connected on described upper beam, is used for fixing sample to be tested；With
Wherein, described upper pressure head is fixedly connected on the lower section of described loading frame；Described lower pressure head is fixedly connected on the described end
On seat, and it is arranged on the vertical lower of described upper pressure head；Described upper pressure head and described lower pressure head cooperate, and are used for
Fixing sample to be tested.
Device the most according to claim 1, it is characterised in that: the first leading screw and the second leading screw are driven by motor and realize
Rotating, the described motor-driven kind of drive is speed reducer drive.
Device the most according to claim 1, it is characterised in that: the first leading screw and the second leading screw are screw rod or ball wire
Thick stick.
Device the most according to claim 1, it is characterised in that: described bearing is journal bearing or axial thrust bearing.
Device the most according to claim 1, it is characterised in that: described device also includes semi-open type fixture, and it is detachable
Be connected to the top of described loading frame, be used for fixing sample to be tested.
Device the most according to claim 5, it is characterised in that: described semi-open type fixture is selected from above having open design
Box structure, described semi-open type fixture includes top panel, lower panel, left panel, right panel and rear board；Described top panel is offered
Having the opening passed for reinforcing bar, described lower panel is detachably connected on described loading frame.
Device the most according to claim 1, it is characterised in that: wherein, between the first described leading screw and the second leading screw
Distance is 300～700mm, and the first described leading screw and the length of the second leading screw are 2000～3000mm.
Device the most according to claim 6, it is characterised in that: wherein, the top panel of described semi-open type fixture and described card
Between the lower end of pawl, the maximum normal distance of relative motion is 1000～1500mm.
9. utilizing the method that the device described in any one of claim 1～8 carries out reinforcing bar and testing concrete performance, it is special
Levy and be, said method comprising the steps of:
(1) the center pull-out test of reinforcing bar and Bond Performance Between Concrete: using reinforcing bar with concrete sample as described sample to be tested
Product are placed in described semi-open type fixture, use described claw to clamp described reinforcing bar and the upper end of concrete sample, rotation
Turn the first leading screw and the second leading screw so that described loading frame moves down, drive described semi-open type fixture to load downwards simultaneously, from
And test reinforcing bar and Bond Performance Between Concrete；
(2) Mechanics Performance Testing of concrete: using concrete sample as described sample to be tested be placed on upper pressure head with under
Between portion's pressure head, rotate the first leading screw and the second leading screw so that described loading frame moves down, drive described upper pressure head simultaneously
Load downwards, thus test the mechanical property of concrete；
The operation order of described step (1) and step (2) is selected from one of following sequence:
A, first carry out step (1), after carry out step (2)；
B, first carry out step (2), after carry out step (1)；
C, step (1) and step (2) are carried out simultaneously.
Method the most according to claim 9, it is characterised in that the control of the rate of displacement precision of described loading frame is as follows:
(1), when rate of displacement is below 1mm/min, precision controlling is at ± 0.005mm/min；With
(2) rate of displacement more than 1mm/min time, precision controlling displacement rate setpoints ± 0.5% within.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610387067.4A CN106124312A (en) | 2016-06-01 | 2016-06-01 | The performance testing device of reinforcing bar and concrete and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610387067.4A CN106124312A (en) | 2016-06-01 | 2016-06-01 | The performance testing device of reinforcing bar and concrete and method |
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| Publication Number | Publication Date |
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| CN106124312A true CN106124312A (en) | 2016-11-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610387067.4A Pending CN106124312A (en) | 2016-06-01 | 2016-06-01 | The performance testing device of reinforcing bar and concrete and method |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917842A (en) * | 2018-01-04 | 2018-04-17 | 广东东箭汽车科技股份有限公司 | A kind of test equipment for automobile power back door electric pole |
| CN108801786A (en) * | 2018-05-30 | 2018-11-13 | 广东知识城运营服务有限公司 | A kind of detection device of concrete strength |
| CN115060578A (en) * | 2022-06-02 | 2022-09-16 | 陕西杨鑫煤矿机械制造有限责任公司 | Tensile testing device of mine chain |
| WO2024020663A1 (en) * | 2022-07-29 | 2024-02-01 | Ribeiro Luiz Claudio Elece | Test specimen, test piston, test base, test assembly and test specimen manufacturing method |
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| CN200968918Y (en) * | 2006-11-15 | 2007-10-31 | 济南试金集团有限公司 | Semi-open type clamping holder device |
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| CN107917842A (en) * | 2018-01-04 | 2018-04-17 | 广东东箭汽车科技股份有限公司 | A kind of test equipment for automobile power back door electric pole |
| CN108801786A (en) * | 2018-05-30 | 2018-11-13 | 广东知识城运营服务有限公司 | A kind of detection device of concrete strength |
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| WO2024020663A1 (en) * | 2022-07-29 | 2024-02-01 | Ribeiro Luiz Claudio Elece | Test specimen, test piston, test base, test assembly and test specimen manufacturing method |
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Application publication date: 20161116 |
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| RJ01 | Rejection of invention patent application after publication |