CN110261222A - Multi-shaft stretching creep test device and its test method - Google Patents
Multi-shaft stretching creep test device and its test method Download PDFInfo
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- CN110261222A CN110261222A CN201910503997.5A CN201910503997A CN110261222A CN 110261222 A CN110261222 A CN 110261222A CN 201910503997 A CN201910503997 A CN 201910503997A CN 110261222 A CN110261222 A CN 110261222A
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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
- G01N3/02—Details
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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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Abstract
The invention discloses a kind of multi-shaft stretching creep test device and its test method, including supporting mechanism, it is multiple side by side and the extension test mechanism that is arranged at intervals in the supporting mechanism and with the data gather computer structure of extension test mechanism communication connection；Its is simple to operate, and test quick and precisely, by the cooperation of multiple groups extension test mechanism and data gather computer structure, in real time accurately acquires test data, obtains more acurrate perfect test result of creeping by multiple groups test data of creeping.
Description
Technical field
The present invention relates to material tensile creep the field of test technology, and in particular to a kind of multi-shaft stretching creep test device and
Its test method.
Background technique
Creeping is the time-varying characteristics of many construction materials inherently, and particularly with concrete structure, the influence crept is then
It becomes apparent.In prestressed reinforced concrete construction, creeping leads to the loss of prestress of structure, and then applicability to structure and resistance to
Long property makes a significant impact, in the bridge of section construction, due to the conversion of structural system, the time deformation of previous structure generation
Constraint of the increment by later period structure will generate creep secondary internal force and branch order of seats counter-force in the structure；In skyscraper, due to
Concrete is crept, and work progress also results in structural internal force redistribution, with the analysis result for not considering concrete creep effect
There to be relatively big difference；In large-span concrete prestressed bridge girder construction, its camber can be gradually reduced by creeping, and make its usability
Can be affected examination.
Summary of the invention
The purpose of the present invention is to provide it is a kind of test it is simple and convenient, quickly and accurately multi-shaft stretching creep test device and
Its test method.
The technical scheme to solve the above technical problems is that multi-shaft stretching creep test device, including support machine
Structure multiple the extension test mechanism that is arranged at intervals in the supporting mechanism and communicates side by side and with the extension test mechanism
The data gather computer structure of connection；
The extension test mechanism includes being arranged on the supporting mechanism and communicating to connect with the data gather computer structure
Pressure sensitive part, positioned at pressure sensitive part upper end compressive resilience part, extend through the compressive resilience part and pressure
The pull rod of induction pieces, the tensile test specimen connecting in the supporting mechanism and with the pull rod and setting are on supporting mechanism
Linear variable difference transformer, and the test side of the linear variable difference transformer connects with the end face of the tensile test specimen
Touching, the linear variable difference transformer and the pressure sensitive part are communicated to connect with the data gather computer structure, the drawing
Restraining position ring block is set on bar.
Further, the supporting mechanism include pedestal, two be located on the pedestal and spaced vertical branch
Support and the crossbeam between two vertical supporting framves, the tensile test specimen be located at the crossbeam and the pedestal it
Between, the pressure sensitive part is located on the crossbeam, and the pull rod is connect through the crossbeam and with the tensile test specimen, described
Linear variable difference transformer is separately positioned on the pedestal and the crossbeam.
Further, the data gather computer structure includes data display instrument and terminal device, the input of the data display instrument
End is communicated to connect with the output end of the output end of the pressure sensitive part and linear variable difference transformer respectively, and the data are aobvious
The input terminal of the output end and the terminal device that show instrument communicates to connect.
Further, finite place piece is set between the pedestal and the tensile test specimen.
Further, drag hook is provided on the end face of the tensile test specimen, the pull rod bottom end is provided with and the drag hook phase
The connection ring of connection.
Further, the pull rod is screw rod, and the stop collar is the nut matched with the screw rod.
Further, the pressure sensitive part is pressure sensor.
Further, the compressive resilience part is compression spring.
The present invention also provides a kind of test methods of multi-shaft stretching creep test device, which is characterized in that including following
Step:
Step is 1.: choosing three groups of tensile test specimens, spacing side by side is put into supporting mechanism, and it is poor to debug setting linear variable
The initial parameter of dynamic transformer；
Step is 2.: after the completion of linear variable difference transformer debugging, testing first wherein a certain group of tensile test specimen
Operation, the following steps are included:
The stop collar being in contact on pull rod with compressive resilience part is screwed, then tensile test specimen is applied to stablize by pull rod and is drawn
Power until the compression of compressive resilience part generates minimum deformation, and is passed test data by linear variable difference transformer
It transports on terminal device；
Step is 3.: is successively tested under the same conditions remaining two groups of tensile test specimen, and records relevant test data；
Step is 4.: three groups of tensile test specimen test results of analysis, determines that tensile test specimen is most preferably crept test result.
Further, the step 1. in debugging setting linear variable difference transformer initial parameter when, drawn by pull rod
Dynamic tensile test specimen, so that the detection end in contact of the end face of tensile test specimen and linear variable difference transformer, and then by linearly may be used
When transformer differential transformer detects that activation signal is transferred to terminal device generation initial parameter, complete to linear variable differential transformation
The debugging of device.
The invention has the following advantages: multi-shaft stretching creep test device provided by the present invention and its test side
Method, it is simple to operate, it tests quick and precisely, by the cooperation of multiple groups extension test mechanism and data gather computer structure, in real time
Test data is accurately acquired, more acurrate perfect test result of creeping is obtained by multiple groups test data of creeping；Wherein,
By the cooperation between pull rod, stop collar and compressive resilience part, reliably apply continual and steady pulling force to tensile test specimen, improves
The stability of stretched operation, it is effective to improve by the double check component of pressure sensitive part and linear variable difference transformer
The stability and accuracy of data acquisition.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is data gather computer structure structural block diagram in the present invention；
Appended drawing reference shown in Fig. 1 to Fig. 2 respectively indicates are as follows: 1- supporting mechanism, 2- extension test mechanism, 20- feeling of stress
Answer part, 21- compressive resilience part, 22- pull rod, 23- tensile test specimen, 24- linear variable difference transformer, 25- stop collar, the bottom 10-
Seat, 11- vertical supporting frame, 12- crossbeam, 30- data display instrument, 31- terminal device, 13- locating part, 26- drag hook, 27- connection
Ring.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
As shown in Figure 1, multi-shaft stretching creep test device, including supporting mechanism 1, multiple side by side and it is arranged at intervals on described
Extension test mechanism 2 in supporting mechanism 1 and the data gather computer structure with the extension test mechanism 2 communication connection.The dress
It is simple to set structure, easy to use, operation is reliable, and supporting mechanism 1 is that extension test mechanism 2 provides stable support, and guarantee was tested
Stablizing for journey carries out.Extension test mechanism 2 is used to carry out extension test operation to tensile test specimen 23, is set as multiple groups, passes through
The data of multiple groups are analyzed, the accuracy for test of creeping is improved.Data gather computer structure is for being acquired test data
Analysis, more intuitively observes the result for test of creeping.
Extension test mechanism 2 includes the pressure sensitive for being arranged on supporting mechanism 1 and communicating to connect with data gather computer structure
Part 20, positioned at 20 upper end of pressure sensitive part compressive resilience part 21, extend through compressive resilience part 21 and pressure sensitive part 20
Pull rod 22, in supporting mechanism 1 and the tensile test specimen 23 that is connect with pull rod 22 and be arranged on supporting mechanism 1 it is linear can
Transformer differential transformer 24, and the test side of linear variable difference transformer 24 is in contact with the end face of tensile test specimen 23, linearly may be used
Transformer differential transformer 24 and pressure sensitive part 20 are communicated to connect with data gather computer structure, and restraining position ring block is arranged on the pull rod 22
25.Pressure sensitive part 20 is using the pressure sensor of model BSHT-2, and compressive resilience part 21 is using compression spring, pull rod 22
Using screw rod, stop collar 25 plays position-limiting action to compression spring using the nut matched with screw rod, nut.When in use,
Can be different according to required applied force, the compression spring of different coefficient of elasticity is installed.20 pairs of pressure sensitive part tests are in tensile test specimen
The pressure that compression spring is subject in 23 drawing process is incuded, and inductive signal is transferred to record point in data-set structure
Analysis；The test side of linear variable difference transformer 24 is contacted with tensile test specimen 23, during the test with 20 shape of pressure sensitive part
Heavy test suite in pairs carries out comprehensive point by the test result to pressure sensitive part 20 and linear variable difference transformer 24
Analysis improves the accuracy for test of creeping.
Wherein, as shown in Fig. 2, data gather computer structure includes data display instrument 30 and terminal device 31, data display instrument 30
Input terminal respectively with the output end of the output end of pressure sensitive part and linear variable difference transformer 24 communicate to connect, data
The input terminal of the output end of display instrument 30 and the terminal device 31 communicates to connect.Preferred terminal device is computer, and data are aobvious
Show the model CHB/A of instrument.
Supporting mechanism 1 include pedestal 10, two be located on pedestal 10 and spaced vertical supporting frame 11 and
Crossbeam 12 between two vertical supporting framves 11, tensile test specimen 23 is between crossbeam 12 and pedestal 10, pressure sensitive part
20 are located on crossbeam 12, and pull rod 22 is connect through crossbeam 12 and with tensile test specimen 23, and linear variable difference transformer 24 is set respectively
It sets on pedestal 10 and crossbeam 12.The length to crossbeam 12, pedestal 10 and vertical supporting frame 11 is needed to adapt to according to test
Property adjustment, crossbeam 12 be pressure sensitive part 20 support is provided, provide preferably test ensure.Between pedestal 10 and tensile test specimen 23
Finite place piece 13 is set.By locating part 13 23 bottom end of tensile test specimen is attached with pedestal 10, wherein tensile test specimen 23
Drag hook 26 is provided on end face, 22 bottom end of pull rod is provided with the connection ring 27 being connected with drag hook 26.Pass through pull ring and connection ring
27 composite structure, convenient for the connection between tensile test specimen 23 and pull rod 22 and tensile test specimen 23 and pedestal 10, and connecting can
Disassembly, the convenient replacement to tensile test specimen 23, to realize the test of creeping to different stretch test specimen 23.
The present invention also provides a kind of test methods of multi-shaft stretching creep test device, which is characterized in that including following
Step:
Step is 1.: choosing three groups of tensile test specimens 23, spacing side by side is put into supporting mechanism 1, and is debugged setting and linearly may be used
The initial parameter of transformer differential transformer 24；When being debugged, tensile test specimen 23 is pulled by pull rod 22, so that tensile test specimen 23
End face and linear variable difference transformer 24 detection end in contact, and then detect and connect by linear variable difference transformer 24
When touching signal is transferred to the generation initial parameter of terminal device 31, the debugging to linear variable difference transformer 24 is completed.
Step is 2.: after the completion of linear variable difference transformer 24 is debugged, carrying out first to wherein a certain group of tensile test specimen 23
Test operation, the following steps are included:
The stop collar 25 being in contact on pull rod 22 with compressive resilience part 21 is screwed, then tensile test specimen 23 is applied by pull rod 22
Add stable pulling force, until the compression of compressive resilience part 21 generates minimum deformation, and passes through linear variable difference transformer 24
Test data is transmitted on terminal device 31；
Step is 3.: is successively tested under the same conditions remaining two groups of tensile test specimen 23, and records dependence test number
According to；
Step is 4.: three groups of 23 test results of tensile test specimen of analysis, determines that tensile test specimen 23 is most preferably crept test result.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. multi-shaft stretching creep test device, which is characterized in that including supporting mechanism (1), multiple side by side and be arranged at intervals on institute
State the extension test mechanism (2) in supporting mechanism (1) and the data gather computer with the extension test mechanism (2) communication connection
Structure；
The extension test mechanism (2) include be arranged on the supporting mechanism (1) and with the data gather computer structure communication link
The pressure sensitive part (20) that connects, extends through the pressure at the compressive resilience part (21) for being located at pressure sensitive part (20) upper end
The pull rod (22) of power elastic component (21) and pressure sensitive part (20), be located at the supporting mechanism (1) in and with the pull rod (22)
The tensile test specimen (23) of connection and the linear variable difference transformer (24) being arranged on supporting mechanism (1), and it is described linear
The test side of variable differential transformer (24) is in contact with the end face of the tensile test specimen (23), the linear variable differential transformation
Device (24) and the pressure sensitive part (20) are communicated to connect with the data gather computer structure, are arranged on the pull rod (22) limited
Position ring (25).
2. multi-shaft stretching creep test device according to claim 1, which is characterized in that the supporting mechanism (1) includes
Pedestal (10), two be located on the pedestal (10) and spaced vertical supporting frame (11) and be located at two described in
Crossbeam (12) between vertical supporting frame (11), the tensile test specimen (23) be located at the crossbeam (12) and the pedestal (10) it
Between, the pressure sensitive part (20) is located on the crossbeam (12), the pull rod (22) through the crossbeam (12) and with it is described
Tensile test specimen (23) connection, the linear variable difference transformer (24) are separately positioned on the pedestal (10) and the crossbeam
(12) on.
3. multi-shaft stretching creep test device according to claim 1, which is characterized in that the data gather computer structure includes
Data display instrument (30) and terminal device (31), the input terminal of the data display instrument (30) respectively with the pressure sensitive part
(20) the output end communication connection of output end and linear variable difference transformer (24), the output of the data display instrument (30)
The input terminal at end and the terminal device (31) communicates to connect.
4. multi-shaft stretching creep test device according to claim 2, which is characterized in that the pedestal (10) and the drawing
Stretch setting finite place piece (13) between test specimen (23).
5. multi-shaft stretching creep test device according to claim 4, which is characterized in that the end of the tensile test specimen (23)
It is provided on face drag hook (26), pull rod (22) bottom end is provided with the connection ring (27) being connected with the drag hook (26).
6. multi-shaft stretching creep test device according to any one of claims 1 to 5, which is characterized in that the pull rod
It (22) is screw rod, the stop collar (25) is the nut matched with the screw rod.
7. multi-shaft stretching creep test device according to claim 6, which is characterized in that the pressure sensitive part (20) is
Pressure sensor.
8. multi-shaft stretching creep test device according to claim 6, which is characterized in that the compressive resilience part (21) is
Compression spring.
9. the test method of multi-shaft stretching creep test device according to any one of claims 1 to 8, which is characterized in that
The following steps are included:
Step is 1.: choosing three groups of tensile test specimens (23), spacing side by side is put into supporting mechanism (1), and is debugged setting and linearly may be used
The initial parameter of transformer differential transformer (24)；
Step is 2.: after the completion of linear variable difference transformer (24) debugging, carrying out first to wherein a certain group of tensile test specimen (23)
Test operation, the following steps are included:
The stop collar (25) being in contact on pull rod (22) with compressive resilience part (21) is screwed, then by pull rod (22) to tensile test specimen
(23) apply and stablize pulling force, until the compression of compressive resilience part (21) generates minimum deformation, and pass through linear variable differential
Test data is transmitted on terminal device (31) by transformer (24)；
Step is 3.: is successively tested under the same conditions remaining two groups of tensile test specimen (23), and records relevant test data；
Step is 4.: three groups of tensile test specimen (23) test results of analysis, determines that tensile test specimen (23) is most preferably crept test result.
10. the test method of multi-shaft stretching creep test device according to claim 9, which is characterized in that the step
1. in when the initial parameter of debugging setting linear variable difference transformer (24), tensile test specimen (23) are pulled by pull rod (22),
So that the detection end in contact of the end face of tensile test specimen (23) and linear variable difference transformer (24), and then it is poor by linear variable
When dynamic transformer (24) detect that activation signal is transferred to terminal device (31) generation initial parameter, complete to linear variable differential
The debugging of transformer (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910503997.5A CN110261222A (en) | 2019-06-12 | 2019-06-12 | Multi-shaft stretching creep test device and its test method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910503997.5A CN110261222A (en) | 2019-06-12 | 2019-06-12 | Multi-shaft stretching creep test device and its test method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112255087A (en) * | 2020-11-05 | 2021-01-22 | 蚌埠产品质量监督检验研究院 | Material tensile strength detection system and use method thereof |
| CN113405911A (en) * | 2021-05-10 | 2021-09-17 | 同济大学 | Experimental device and experimental method for synchronously measuring tension and compression creep of concrete |
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| CN103149094A (en) * | 2013-03-05 | 2013-06-12 | 华北水利水电学院 | Measuring method and device for tensile creep of early-age concrete |
| CN103149100A (en) * | 2013-02-18 | 2013-06-12 | 东南大学 | Concrete axis stretching creep tester and test method thereof |
| CN105784491A (en) * | 2016-03-10 | 2016-07-20 | 清华大学 | Cement-based material compression creep testing device |
| CN106840927A (en) * | 2016-12-22 | 2017-06-13 | 西南交通大学 | Tension-torsion is combined fretting fatigue testing equipment and test method |
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| JP2006078365A (en) * | 2004-09-10 | 2006-03-23 | Momose Kikai Sekkei Kk | Tensile tester |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112255087A (en) * | 2020-11-05 | 2021-01-22 | 蚌埠产品质量监督检验研究院 | Material tensile strength detection system and use method thereof |
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| CN113405911A (en) * | 2021-05-10 | 2021-09-17 | 同济大学 | Experimental device and experimental method for synchronously measuring tension and compression creep of concrete |
| CN113405911B (en) * | 2021-05-10 | 2022-09-09 | 同济大学 | Experimental device and experimental method for synchronously measuring tension and compression creep of concrete |
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Application publication date: 20190920 |