CN106290808B - Loading device and method for concrete durability test under load coupling - Google Patents
Loading device and method for concrete durability test under load coupling Download PDFInfo
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- CN106290808B CN106290808B CN201510267161.1A CN201510267161A CN106290808B CN 106290808 B CN106290808 B CN 106290808B CN 201510267161 A CN201510267161 A CN 201510267161A CN 106290808 B CN106290808 B CN 106290808B
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- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 238000011068 loading method Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008878 coupling Effects 0.000 title claims abstract description 15
- 238000010168 coupling process Methods 0.000 title claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 40
- 239000010959 steel Substances 0.000 claims description 40
- 230000006835 compression Effects 0.000 claims description 31
- 238000007906 compression Methods 0.000 claims description 31
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000007613 environmental effect Effects 0.000 claims description 3
- KJLPSBMDOIVXSN-UHFFFAOYSA-N 4-[4-[2-[4-(3,4-dicarboxyphenoxy)phenyl]propan-2-yl]phenoxy]phthalic acid Chemical compound C=1C=C(OC=2C=C(C(C(O)=O)=CC=2)C(O)=O)C=CC=1C(C)(C)C(C=C1)=CC=C1OC1=CC=C(C(O)=O)C(C(O)=O)=C1 KJLPSBMDOIVXSN-UHFFFAOYSA-N 0.000 claims 1
- 238000005452 bending Methods 0.000 claims 1
- 230000001808 coupling effect Effects 0.000 claims 1
- 229910000754 Wrought iron Inorganic materials 0.000 abstract description 80
- 238000012856 packing Methods 0.000 abstract description 26
- 238000002474 experimental method Methods 0.000 abstract description 6
- 235000000396 iron Nutrition 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000007832 Na2SO4 Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 230000005483 Hooke's law Effects 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- 150000003839 salts Chemical class 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention relates to the loading devices and method of concrete durability experiment under a kind of coupling for load, the device includes longitudinally disposed in a left side, two concave pull rods of right two sides, at least two concrete prisms are successively stacked from bottom to top and are across on the recess portion of two concave pull rods, on, two first rod irons are vertically arranged between lower two adjacent concrete prisms, each two upper end of concave pull rod is successively arranged with concave packing washer from bottom to top respectively, Washer-type Presure Sensor, pressure spring and threaded fastener, the second rod iron is vertically arranged between the concave packing washer and the concrete prism of topmost, when the threaded fastener is locked downwards, pressure spring is through Washer-type Presure Sensor, concave packing washer, second rod iron is accurately further applied load to concrete prism.The device and method is reasonable in design, simple, and uniformly, accurately, load effect is good, and is suitable for the experimental enviroment of various concrete durable tests for load.
Description
Technical field
The present invention relates to concrete durability the field of test technology, in particular to a kind of for coagulation under load coupling
The loading device and method of native durability test.
Background technique
It is traditionally used for the experimental rig and loading method being further applied load when research Durability of Concrete, or due to adding
It is too small to carry range, or since structure is complicated and design is unreasonable for loading device itself, or since loading accuracy is bad and loads not
Uniformly, or since loading device is easy to corrode, cause loading device and corresponding loading method poor for applicability, the test number obtained
According to inaccuracy, test result is leveraged.
Summary of the invention
The purpose of the present invention is to provide a kind of loading devices of concrete durability experiment under coupling for load
And method, the device and method is reasonable in design, simple, and uniformly, accurately, load effect is good for load.
To achieve the above object, the technical scheme is that it is a kind of for concrete durability under load coupling
The loading device of test, including longitudinally disposed two concave pull rods in arranged on left and right sides, at least two concrete prisms are certainly
It successively stacks and is across on the recess portion of two concave pull rods on down, along vertical between upper and lower two adjacent concrete prisms
To being provided with two first rod irons, each two upper end of concave pull rod be successively arranged with from bottom to top respectively concave packing washer,
Washer-type Presure Sensor, pressure spring and threaded fastener, between the concave packing washer and the concrete prism of topmost
It is vertically arranged with the second rod iron, with when the threaded fastener is locked downwards, pressure spring is through Washer-type Presure Sensor, concave
Packing washer, the second rod iron are accurately further applied load to concrete prism.
Further, it is equipped with packing washer in the upper and lower side of the pressure spring, to guarantee the vertical uniform compression of pressure spring, power transmission
Uniformly；The concave packing washer for being sheathed on two upper end of concave pull rod is connected as one, to guarantee two vertical bars of concave pull rod
The up rightness of spacing and concave pull rod between part.
Further, from bottom to top, between (2n-1) a concrete prism and the 2n concrete prism
At trisection where one rod iron is set to two concave pull rods between plane, 2n concrete prism and (2n+1) are a
The first rod iron between concrete prism is set to two concave pull rod institutes in the plane, and wherein n is the integer greater than 0；Such as
Fruit concrete prism shares even number root, then second rod iron is set to the concave pull rod institute in the plane, if coagulation
Native prism shares odd number root, then at the trisection where second rod iron is set to two concave pull rods between plane, and
Rigid force transmission beam is equipped between second rod iron and concave packing washer, to transmit the concave pressure to second rod iron
The pressure that tight washer applies.
Further, the Washer-type Presure Sensor is connected with microcomputer control unit, to detect the lotus of pressure spring application
Load value, it is ensured that payload values suffered by concrete prism are met the requirements.
Further, the concrete prism is provided on the surface contacted with same first rod iron or the second rod iron
At least two piezoelectric type load cells, and the piezoelectric type load cell be distributed in along longitudinal direction the concrete prism with
On the surface of same first rod iron or the contact of the second rod iron, the piezoelectric type load cell is connected with microcomputer control unit,
It is whether consistent with the stress size for detecting each contact position, thus the position of correction the first rod iron and the second rod iron.
Further, the concave pull rod is bent to form by cylindrical steel rods.
The present invention also provides a kind of loading methods of concrete durability experiment under coupling for load, including with
Lower step:
(1) concrete prism by maintenance to regulation age carries out scribing line positioning: determining concave pull rod and the second rod iron
Placement location draws two first straight lines in the width direction on concrete prism；To the coagulation between two first straight lines
Native prism trisection, and second straight line is drawn along trisection line, so that it is determined that the first rod iron placement location；
(2) two concave pull rods of longitudinally parallel setting, and the concrete prism for painting line is across two concaves
On the recess portion of pull rod, and make concave pull rod and first straight line in the same plane；
(3) then longitudinally disposed first rod iron on the concrete prism is arranged another on first rod iron
One concrete prism；The first rod iron and concrete prism are successively stacked using same procedure, until all concrete prisms
Body stacks completion；The setting method of first rod iron are as follows: from bottom to top, (2n-1) a concrete prism and 2n are a mixed
The first rod iron between solidifying soil prism is set at the second straight line, and 2n concrete prism and (2n+1) are a mixed
The first rod iron between solidifying soil prism is set at the first straight line, and wherein n is the integer greater than 0；
(4) longitudinally disposed second rod iron on the upside of the concrete prism of topmost, the setting side of second rod iron
Method are as follows: if concrete prism shares even number root, second rod iron is set at the first straight line；If concrete
Prism shares odd number root, then second rod iron is set at the second straight line, and in second rod iron and concave pressure
Rigid force transmission beam is set between tight washer, to transmit the pressure that the concave packing washer applies to second rod iron；So
It is inserted in the concave packing washer being connected as one in each two upper end of concave pull rod afterwards, to push down most by second rod iron
The concrete prism on top；
(5) it is inserted in Washer-type Presure Sensor, packing washer, pressure spring and compression respectively in each two upper end of concave pull rod
Washer, and screw in threaded fastener and lock downwards；
(6) Washer-type Presure Sensor is connected to microcomputer control unit, to pass through the washer type pressure sensing
The payload values size of device detection pressure spring application simultaneously adjusts rod iron position；Threaded fastener is rotated, the decrement of pressure spring is adjusted, to apply
Add the load being sized；
(7) whole device of loaded is put into specific environmental test chamber, carries out durability test.
Further, in step (2), before stacking first rod iron and concrete prism, in the concrete
Piezoelectric type load cell is set on the surface that prism is contacted with the first rod iron；In step (3), the second rod iron is being set
Before, piezoelectric type load cell is also provided on the surface that the concrete prism is contacted with the second rod iron；The piezoelectric type
Load cell is connected with microcomputer control unit, to detect the stress size of each contact position；Then according to each contact position
Stress size, adjust different threaded fasteners screws degree and rod iron position, applies on concrete prism uniform
Load allows to test to the durability under the pure pressure of concrete or pure tension state.
Further, in step (7) a metallic, pass through microcomputer control unit monitoring concrete during durability test
The variation of prism stress.
Further, in step (6), according to formula F=K* l, wherein F is the payload values of required application, and K is pressure spring
Coefficient of elasticity,lFor the decrement of pressure spring, the decrement of pressure spring is adjusted, thus by the decrement of adjusting pressure spring in concrete
Apply uniform load on prism.
Compared with prior art, the beneficial effects of the present invention are: detection or adjusting pressure that the present invention passes through load cell
The decrement of spring realizes the accurate compression displacement of pressure spring, accomplishes accurately to be displaced load；Due to needing to consider in durability test
The tests such as long-term initial load such as anti-carbonation, chloride-penetration resistance, the loading device and Method And Principle are concise, easy to operate, at
Sheet is cheap, and reuse rate is high, compact, the error very little due to caused by temperature, and load effect is obvious, reaches itself oneself
Balance, can satisfy large batch of durability test in a short time；Loading system reliable performance of the present invention, during the whole test process
Substantially there is not the phenomenon that stress relaxation.
Detailed description of the invention
Fig. 1 is the loading device structure schematic elevation view of one embodiment of the invention.
Fig. 2 is the corresponding structure schematic side view of Fig. 1.
Fig. 3 is the loading device structure schematic elevation view of another embodiment of the present invention.
Fig. 4 is middle washer formula of embodiment of the present invention pressure sensor, piezoelectric type load cell and microcomputer control unit
Circuit connection diagram.
In figure: 1- concave pull rod, 2- concrete prism, the first rod iron of 3-, 4- concave packing washer, 5- pressure spring, 6- spiral shell
Line fastener, the second rod iron of 7-, 8- Washer-type Presure Sensor, 9- packing washer, 10- microcomputer control unit, 11- concave pull rod
Recess portion, 12- piezoelectric type load cell, 13- rigidity force transmission beam.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is described in further details.
As shown in Figure 1, 2, loading device of the present invention for concrete durability experiment under load coupling, including edge
Two concave pull rods 1 of arranged on left and right sides are longitudinally disposed at, at least two concrete prisms 2 successively stack from bottom to top and cross
Across on the recess portion 11 of two concave pull rods 1, two are vertically arranged between upper and lower two adjacent concrete prisms 2
One rod iron 3,1 liang of upper end of each concave pull rod is successively arranged with concave packing washer 4 from bottom to top respectively, washer type pressure passes
It is vertically arranged between the concrete prism 2 of sensor 8, pressure spring 5 and threaded fastener 6, concave packing washer 4 and topmost
Second rod iron 7, with when threaded fastener 6 is locked downwards, pressure spring 5 is through Washer-type Presure Sensor 8, concave packing washer 4, the
Two rod irons 7 are accurately further applied load to concrete prism 2.
Wherein, the setting method of the first rod iron 3 and the second rod iron 7 are as follows: from bottom to top, (2n-1) a concrete prism
At trisection where the first rod iron between the 2n concrete prism is set to two concave pull rods between plane, the
The first rod iron between 2n concrete prism and (2n+1) a concrete prism is set to where two concave pull rods
In plane, wherein n is the integer greater than 0.If concrete prism 2 shares even number root, the second rod iron 7 is set to concave drawing
1 institute of bar is in the plane.As shown in figure 3, the second rod iron 7 is set to two concaves if concrete prism 2 shares odd number root
At trisection between 1 place plane of pull rod, it is horizontal that rigid power transmission is set between the second rod iron 7 and concave packing washer 4 at this time
Beam 13, with the pressure applied to the second rod iron 7 transmitting concave packing washer 4.In a preferred embodiment of the present invention, it is contemplated that rigidity
The number of concrete prism is limited to even number by the cost problem of force transmission beam, to exempt rigid force transmission beam.
In the present embodiment, it is equipped with packing washer 9 in the upper and lower side of pressure spring 5, to guarantee the vertical uniform compression of pressure spring 5,
Power transmission is uniform；The concave packing washer 4 for being sheathed on 1 liang of upper end of concave pull rod is connected as one, to guarantee 1 two, concave pull rod
The up rightness of spacing and concave pull rod between vertical bar.
In order to improve the accuracy and uniformity of load, as shown in figure 4, Washer-type Presure Sensor 8 and microcomputer control are single
Member 10 is connected, to detect the payload values of the application of pressure spring 5, it is ensured that payload values suffered by concrete prism 2 are met the requirements.This
Outside, concrete prism 2 is provided with piezoelectric type load cell 12 on the surface contacted with the first rod iron 3 or the second rod iron 7.
Preferably, concrete prism 2 is provided at least two pressures on the surface contacted with same first rod iron 3 or the second rod iron 7
Electric-type load cell 12, and piezoelectric type load cell 12 is distributed in concrete prism 2 and same first rod iron 3 along longitudinal direction
Or second rod iron 7 contact surface on.As shown in figure 4, piezoelectric type load cell 12 is also connected with microcomputer control unit 9,
It is whether consistent with the stress size for detecting each contact position, thus the position of correction the first rod iron and the second rod iron, it is ensured that upper
Stating the concrete load between two trisection lines (i.e. following second straight lines) is pure pressure or pure drawing.
It since concrete durability test envionmental humidity is substantially 80% or more, or is NaCl or Na2SO4Solution salt fog
Environment even requires component being immersed in NaCl or Na2SO4In solution, so being set to loading device of the present invention and its detection
It is standby to have the requirement of moisture-proof and anti-corrosion.In the present embodiment, Washer-type Presure Sensor 8 is with piezoelectric type load cell 12
Anti-corrosion damp-proof type sensor, to adapt to concrete durability test environment.The material of loading device of the present invention is by special
The processed steel member of anti-corrosion or stainless steel material, to adapt to different experimental test environment, guarantee test data it is reliable
Property.
In the present embodiment, concave pull rod 1 is bent to form by cylindrical steel rods, to guarantee to load.Two adjacent first rod irons 3
The distance between with the first rod iron 3 being equidistant to 1 place plane of concave pull rod.The diameter of first rod iron 3 is 25mm.Pressure spring
5 be automobile die springs, and the automobile die springs can bear 300,000 CYCLIC LOADINGs, according to automobile die springs
Coefficient of elasticity (fixed number) and Hooke's law calculate the compressed value of automobile die springs, are accurate to mm, can control loading force
Size.
The present invention also provides a kind of loading methods of concrete durability experiment under coupling for load, including with
Lower step:
(1) concrete prism 2 by maintenance to regulation age carries out scribing line positioning: determining concave pull rod 1 and the second steel
7 placement location of stick draws two first straight lines in the width direction on concrete prism 2；To between two first straight lines
2 trisection of concrete prism, and second straight line is drawn along trisection line, so that it is determined that 3 placement location of the first rod iron
(2) two concave pull rods 1 of longitudinally parallel setting, and by the concrete prism 2 for painting line be across two it is recessed
On the recess portion 11 of type pull rod 1, and make concave pull rod 1 and first straight line in the same plane.
(3) longitudinally disposed first rod iron 3 on concrete prism 2, is then arranged another coagulation on the first rod iron 3
Native prism 2；The first rod iron 3 and concrete prism 2 are successively stacked using same procedure, until all concrete prisms 2
Stack completion.The setting method of first rod iron 3 are as follows: from bottom to top, (2n-1) a concrete prism and the 2n concrete
The first rod iron between prism is set at second straight line, 2n concrete prism and (2n+1) a concrete prism
The first rod iron between body is set at first straight line, and wherein n is the integer greater than 0.
(4) in 2 longitudinally disposed second rod iron 7 in upside of the concrete prism of topmost, the setting method of the second rod iron 7
Are as follows: if concrete prism 2 shares even number root, and the second rod iron 7 is set at first straight line；If concrete prism 2
Shared odd number root, then the second rod iron 7 is set at second straight line, and is arranged just between the second rod iron 7 and concave packing washer 4
Property force transmission beam, with to the second rod iron 7 transmitting concave packing washer 4 apply pressure；Then in 1 liang of upper end of each concave pull rod
The concave packing washer 4 being connected as one is inserted in portion, to push down the concrete prism 2 of topmost by the second rod iron 7.
(5) it is inserted in Washer-type Presure Sensor 8, packing washer 9,5 and of pressure spring respectively in 1 liang of upper end of each concave pull rod
Packing washer 9, and screw in threaded fastener 6 and lock downwards.
(6) Washer-type Presure Sensor 8 is connected to microcomputer control unit 10, to examine by Washer-type Presure Sensor 8
It surveys the payload values size that pressure spring 5 applies and adjusts rod iron position；Threaded fastener 6 is rotated, the decrement of pressure spring 5 is adjusted, to apply
Add the load being sized.
(7) whole device of loaded is put into specific environmental test chamber, carries out durability test.
In a preferred embodiment of the present invention, in step (2), before stacking the first rod iron 3 and concrete prism 2,
Piezoelectric type load cell 12 is set on the surface that concrete prism 2 is contacted with the first rod iron 3；In step (3), it is being arranged
Before second rod iron 7, piezoelectric type load cell 12 is also provided on the surface that concrete prism 2 is contacted with the second rod iron 7；Pressure
Electric-type load cell 12 is connected with microcomputer control unit 10, to detect the stress size of each contact position；Then according to each
The stress size of contact position adjusts the position for screwing degree and the first rod iron 3, the second rod iron 7 of different threaded fasteners 6,
To apply uniform load on concrete prism 2 by the decrement for changing different pressure springs 5；In step (7) a metallic, lead to
Cross the variation of the monitoring of microcomputer control unit 10 2 stress of concrete prism during durability test.
It in an alternative embodiment of the invention, can also be according to formula F=K* l, wherein F is the payload values of required application, and K is
The coefficient of elasticity of pressure spring,lFor the decrement of pressure spring, the decrement of pressure spring is adjusted, to mix by the decrement for adjusting pressure spring 5
Apply uniform load on solidifying soil prism 2.
The above are preferred embodiments of the present invention, all any changes made according to the technical solution of the present invention, and generated function is made
When with range without departing from technical solution of the present invention, all belong to the scope of protection of the present invention.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510267161.1A CN106290808B (en) | 2015-05-25 | 2015-05-25 | Loading device and method for concrete durability test under load coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510267161.1A CN106290808B (en) | 2015-05-25 | 2015-05-25 | Loading device and method for concrete durability test under load coupling |
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| CN106290808A CN106290808A (en) | 2017-01-04 |
| CN106290808B true CN106290808B (en) | 2019-03-12 |
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| CN108548773B (en) * | 2018-03-30 | 2021-09-07 | 河海大学 | Auxiliary device for testing anti-corrosion performance of steel bar under bending and its use method |
| CN110702603B (en) * | 2019-12-13 | 2020-06-19 | 永一橡胶有限公司 | Uniformity detection equipment and method for tire curing bladder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2906592Y (en) * | 2006-06-20 | 2007-05-30 | 中国建筑材料科学研究总院 | Sensor Method Stress Loading Device |
| CN101979990A (en) * | 2010-10-15 | 2011-02-23 | 中国建筑材料科学研究总院 | Self-positioning detachable concrete durability test stress loading device |
| CN102359931A (en) * | 2011-09-19 | 2012-02-22 | 东南大学 | Concrete fatigue load and environmental coupling experiment apparatus |
| CN102998174A (en) * | 2011-09-09 | 2013-03-27 | 中交四航工程研究院有限公司 | Long-term loading apparatus system for concrete sample durability tests |
| CN103674708A (en) * | 2013-12-27 | 2014-03-26 | 大连大学 | Multi-factor coupling concrete durability study experiment loading device |
-
2015
- 2015-05-25 CN CN201510267161.1A patent/CN106290808B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2906592Y (en) * | 2006-06-20 | 2007-05-30 | 中国建筑材料科学研究总院 | Sensor Method Stress Loading Device |
| CN101979990A (en) * | 2010-10-15 | 2011-02-23 | 中国建筑材料科学研究总院 | Self-positioning detachable concrete durability test stress loading device |
| CN102998174A (en) * | 2011-09-09 | 2013-03-27 | 中交四航工程研究院有限公司 | Long-term loading apparatus system for concrete sample durability tests |
| CN102359931A (en) * | 2011-09-19 | 2012-02-22 | 东南大学 | Concrete fatigue load and environmental coupling experiment apparatus |
| CN103674708A (en) * | 2013-12-27 | 2014-03-26 | 大连大学 | Multi-factor coupling concrete durability study experiment loading device |
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