CN208043552U - A kind of device of test eccentric tension concrete durability - Google Patents
A kind of device of test eccentric tension concrete durability Download PDFInfo
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- CN208043552U CN208043552U CN201820175250.2U CN201820175250U CN208043552U CN 208043552 U CN208043552 U CN 208043552U CN 201820175250 U CN201820175250 U CN 201820175250U CN 208043552 U CN208043552 U CN 208043552U
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- 238000012360 testing method Methods 0.000 title claims abstract description 62
- 238000005452 bending Methods 0.000 claims abstract description 23
- 150000003839 salts Chemical class 0.000 claims abstract description 23
- 238000010257 thawing Methods 0.000 claims abstract description 19
- 239000002689 soil Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 239000012267 brine Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 230000003628 erosive effect Effects 0.000 claims description 9
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 9
- 230000008014 freezing Effects 0.000 claims description 7
- 238000007710 freezing Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000012669 compression test Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a kind of devices of test eccentric tension concrete durability, including：Testing stand；The reaction frame being fixed on testing stand, reaction frame sidewall symmetry are equipped with two pieces of fixed blocks, the lateral load bar moved up and down along reaction frame are equipped with below fixed block；Tensioning system, it is divided into tensioning member and next drawing part, upper tensioning member upper end is fixed at the top of reaction frame, and next drawing part lower end is fixed with lateral load bar, upper tensioning member lower end is fixed with next drawing part upper end with concrete sample, and jack is symmetrical arranged between fixed block and lateral load bar；The bending loading system being fixed on reaction frame side wall；The condition test circulatory system, for providing concrete sample experimental enviroment；Data acquisition controller.Tested using the device of the utility model, there is the features such as true and accurate, simple operable, cheap, to greatest extent close to electric power pylon concrete pipe base salt lose or freezing-thawing under bear to stretch the operating mode with wind action simultaneously.
Description
Technical field
The utility model is related to concrete strengths and durability test field, mixed more particularly, to a kind of test eccentric tension
The device of solidifying soil durability.
Background technology
There is the soil of the length and breadth of land and abundant wind resource, transmission line of electricity to pass through gobi, oasis and be transported to the energy in Xinjiang
Local huge numbers of families are transported to interior ground big city small town.The conveying of electric power energy be unable to do without electric power pylon, supports the mixed of electric power pylon
The long-term security of solidifying soil stake is directly related to the safety of electric power pylon and entire transmission line of electricity.Support steel tower concrete-pile by
It is bent in horizontal wind excitation, while the concrete-pile of windward side bears stretching action due to the trend of toppling over of steel tower, that is, supports
The part pile foundation of steel tower bears eccentric tension effect.Moreover, Xinjiang earth's surface salination is serious, annual salt erosion causes a large amount of bases to set
Apply damage.
In addition to this, Xinjiang belongs to seasonal frost region, and winter surface temperature is below the freezing point, and the water in concrete voids becomes ice crystal
Volume expansion, while the ice crystal into concrete of the non-freeze water outside concrete migrates, and leads to the ice crystal in concrete hollow gap
Volume increased dramatically, and ice crystal volume increased dramatically generates huge splitting power in inside concrete, show that macroscopic view is improved quality damage
It loses, integrality declines, and strength reduction, summer temp warms, and ice crystal disappears, in cycles, research shows that moisture supplement is frost heave
The main reason for, every year since freeze thawing causes a large amount of infrastructure to be damaged.
It is many to can be used for testing coagulation earth salt erosion durability instrument and equipment both at home and abroad at present, the equipment for testing concrete strength
Also it has been reported that.But for the loading characteristic of Xinjiang special region condition and column foot, that is, test eccentric under salt erosion or freezing-thawing
The experimental rig and method of tension concrete durability but rarely have people's research.
Utility model content
The utility model provides a kind of device of test eccentric tension concrete durability, has true and accurate, simply may be used
Operation, it is cheap the features such as, approach to greatest extent electric power pylon concrete pipe base salt erosion or freezing-thawing under and meanwhile hold
The operating mode of Tensile and wind load, for bear larger wind load and salinized soil or frozen soil blazon area electric power pylon concrete-pile
The research of base provides technical support and theoretical direction.
A kind of device of test eccentric tension concrete durability, including：
Testing stand；
Reaction frame is fixed on testing stand, and reaction frame sidewall symmetry is equipped with two pieces of fixed blocks, is equipped with below the fixed block
The lateral load bar moved up and down along reaction frame；
Tensioning system is divided into tensioning member and next drawing part, and the upper tensioning member upper end is fixed at the top of reaction frame, described
Next drawing part lower end is fixed with lateral load bar, and the upper tensioning member lower end is equipped with adhesive panel with next drawing part upper end, described
It is symmetrical arranged the first jack between fixed block and lateral load bar；
It is bent loading system, is mounted on reaction frame side wall, for providing bending load to concrete sample；
The condition test circulatory system, the experimental enviroment for providing concrete sample；
Data acquisition controller is electrically connected with tensioning system and alternating bending system；
The bending loading system includes：
Second jack, the second pressure sensor being fixed between the second very heavy top/bottom part and reaction frame side wall, is used for
The test specimen fixed ring of fixing concrete test specimen, top and the test specimen fixed ring of second jack offset.
The utility model is by tensioning system, bending loading system synergistic effect so that it can act on concrete simultaneously
It is stretched on test specimen with reaching simulation concrete while bearing, the operating mode of bending load.
Preferably, the upper tensioning member upper end is by fixed at the top of flexural pivot and reaction frame, the next drawing part lower end is logical
Flexural pivot is crossed to fix with lateral load bar.
Preferably, the adhesive panel can be copper coin, when experiment, will paste copper coin with high-strength resin glue and be fixed on coagulation
Native test specimen upper and lower end face.Copper coin is pasted by setting, active force when stretching is made more uniformly to act on concrete surface.
Preferably, the upper tensioning member lower end, next drawing part upper end are arranged symmetrically bolt by 8 and paste copper coin
It is fixed.
Preferably, being equipped with first pressure sensor between the jack and lateral load bar, the first pressure passes
Sensor is electrically connected with data acquisition controller.
By adjusting the first jack, so that lateral load bar moving up and down is moved down, concrete sample is generated
Axial tension acts on, and the axial tension action intensity of concrete sample is measured by first pressure sensor.
The utility model provides power using the second jack for concrete sample bending, and the second jack acts on test specimen
Fixed ring not only can guarantee effective transmission of power but also can prevent the second jack from directly acting on concrete sample and caused stress concentration
Caused concrete sample destroys.The size of bending load is measured by second pressure sensor values.
In utility model device, the condition test circulatory system can be that salt loses system, and the salt loses system packet
It includes：
Rubber sleeve is wrapped on the outside of concrete sample, the gap between being used in combination sandy soil to fill；
Sealing rubber ring is located at concrete sample end and seals concrete sample and rubber sleeve；
Markov bottle is equipped with brine, is connected with rubber sleeve, and it is not high in invading for concrete sample to adjust brine by air inlet pipe
Degree.
Concrete sample upper and lower ends prevent brine from leaking out using seal with elastometic washer, and Markov bottle fills for use brine and rubber
Set is connected, and providing constant salt to concrete sample loses water level, and concrete sample salt loses the capillary that water level above section utilizes sandy soil
Effect carries out salt erosion, and true environment is simulated to greatest extent with this.
Preferably, the condition test circulatory system can also be freezing and thawing system, the freezing and thawing system includes：
Rubber sleeve is wrapped on the outside of concrete sample, the gap between being used in combination sandy soil to fill；
Sealing rubber ring is located at concrete sample end and seals concrete sample and rubber sleeve；
Markov bottle is equipped with pure water, is connected with rubber sleeve, and it is not high in invading for concrete sample to adjust pure water by air inlet pipe
Degree；
Freezing-thawing chamber wraps up the testing stand, reaction frame, tensioning system and bending loading system to provide freeze thawing
Environment.
What a kind of device using test eccentric tension concrete durability described in any of the above-described technical solution was tested
Method includes the following steps：
Step 1, tensioning system, bending loading system and the condition test circulatory system cooperate, and concrete sample is consolidated
It is scheduled in reaction frame；
Step 2, simultaneous equal adjusts the first jack in tensioning system, pushes lateral load bar to move down and forces its drawing
Stretch concrete sample, when data acquisition controller collect pulling force reach setting numerical value when stop load, at this moment concrete axial to
Tensile stress is：
Wherein, σ1For concrete sample axial tension stress, F1The first jack pair for data acquisition controller acquisition is lateral
The thrust of load bar, A are concrete sample area of section；
Step 3, adjust bending loading system in the second jack, push test specimen fixed ring, make concrete sample by
Eccentricity pressure stops load when data collector collects when pressure reaches setting numerical value, then the second jack pair concrete tries
Part apply moment be：
Wherein, M is the Maximum bending moment that concrete sample is born, F0Second pressure for data acquisition controller acquisition passes
The pressure value of sensor, L are concrete sample length；
Step 4, concrete sample is completed in experiment to take out, is placed on omnipotent concrete compression test and obtains concrete examination
Part axial compressive strength standard value, then calculates cubic compressive strength standard value, and calculation formula is：
Wherein, fcu,kFor cubic compressive strength standard value, fckFor axial compressive strength standard value, αc1For prism intensity
With the ratio of cube strength, αc2For Brittleness of Concrete coefficient.
The utility model makes it by tensioning system, the synergistic effect of bending loading system and the condition test circulatory system
It can act on concrete sample simultaneously, to greatest extent close to electric power pylon concrete pipe base under salt erosion or freezing-thawing
It bears to stretch simultaneously, the operating mode of wind action；The apparatus structure is simple, is conveniently operated, can be larger by adjusting jack
The size of the adjusting drawing force and flecition power of range, acquisition mass data is for researching and analysing, to bear larger wind load
And salinized soil or frozen soil blazon research offer technical support and the theoretical direction of the electric power pylon concrete pipe base in area.
Description of the drawings
Fig. 1 is the structural schematic diagram that utility model device loses system with salt；
Fig. 2 is the structural schematic diagram of upper tensioning member and next drawing part；
Fig. 3 is the structural schematic diagram for being bent loading system；
Fig. 4 is the structural schematic diagram that salt loses system；
Fig. 5 is structural schematic diagram of the utility model device with freezing and thawing system.
Specific implementation mode
The utility model is further described with reference to the accompanying drawings and detailed description：
As shown in Figure 1, a kind of device of test eccentric tension concrete durability, including testing stand 1, reaction frame 2, stretching
System, bending loading system 3, the condition test circulatory system and data acquisition controller 5.In the present embodiment, condition test cycle
System loses system 4 using salt.Reaction frame 2 is mounted on testing stand 1, and 2 sidewall symmetry of reaction frame is equipped with two pieces of fixed blocks 6, fixed
6 lower section of block is equipped with can be along the lateral load bar 7 that reaction frame 2 moves up and down.Tensioning system include upper tensioning member, next drawing part,
First jack 8 and first pressure sensor 9.Upper tensioning member upper end is fixed by flexural pivot 10 and 2 top of reaction frame, lower stretching
9 lower end of part is fixed by flexural pivot 10 and lateral load bar 7, is arranged after 8 bottom of the first jack installation first pressure sensor 9 and is existed
Between fixed block 6 and lateral load bar 7, first pressure sensor 9 is electrically connected with data acquisition controller 5.
As shown in Fig. 2, upper tensioning member is symmetrical arranged with next drawing part, upper tensioning member lower part is fixed with next drawing part top
There are power transmission copper coin 11, power transmission copper coin 11 to be connected respectively with copper coin 12 is pasted by 8 symmetrical bolts, 2 identical glutinous
Copper-surfaced plate 12 pastes concrete sample upper and lower end face respectively by high-strength resin glue.
As shown in figure 3, bending loading system includes the second jack 31, test specimen fixed ring 32 and second pressure sensor
33,31 bottom of the second jack is fixed on after installing second pressure sensor 33 on 2 side wall of reaction frame, second pressure sensor 33
All it is electrically connected with data acquisition controller 5.
Power is provided for concrete sample bending using the second jack 31, the second jack 31, which acts on, is fixed on test specimen
The test specimen fixed ring 32 at middle part not only can guarantee effective transmission of power but also can prevent the second jack 31 from directly acting on concrete examination
Part causes stress concentration to cause concrete destruction.The size of load passes through between the second jack 31 and reaction frame 2
Two pressure sensors 33 measure.
As shown in figure 4, salt erosion system 4 includes sealing rubber ring 41, sandy soil 42, rubber sleeve 43 and Markov bottle 44；Concrete
Test specimen is placed in rubber sleeve 43 and symmetrically filling gap, upper and lower ends are sealed using rubber ring 41 with sandy soil 42, and Markov bottle 44 fills
Full for use brine is connected with rubber sleeve 43.It is not high in invading for concrete sample that brine is adjusted by the air inlet pipe 45 in Markov bottle 44
Degree provides constant salt to concrete sample and loses water level, and concrete sample salt is lost water level above section and made using the capillary of sandy soil 42
With salt erosion is carried out, true environment is simulated to greatest extent.
As shown in figure 5, the condition test circulatory system in the experimental rig can also use freezing and thawing system, lost with using salt
The device of system is compared, and what Markov bottle 44 filled is pure water, and whole for wrapping up equipped with freezing-thawing chamber 13 outside device
A experimental rig is to provide freezing-thawing.44 Markov bottle 44 of Markov bottle is filled for use pure water with rubber sleeve 43 to be connected.Pass through horse
Air inlet pipe 45 on family name's bottle 44 adjusts pure water and invades no height in concrete sample, provides constant water level to concrete sample, mixes
Solidifying soil test specimen water level above section is supplemented using the capillarity of sandy soil 42, and operation freezing-thawing chamber 13 reduces experiment
The temperature of environment simulates true freezing-thawing to greatest extent.
Using the device for losing system with salt, the method for testing eccentric tension concrete durability includes the following steps：
(1) concrete sample to be measured is put into rubber sleeve 43, and is filled out therebetween with the compression of 2cm thickness sandy soil 42
It is real, concrete sample and rubber sleeve 43 are sealed with sealing rubber ring 41；
(2) copper coin 12 of pasting of upper tensioning member lower end and next drawing part upper end is fixed on concrete examination with high-strength resin glue
Part upper and lower end face；It is by flexural pivot 10 that upper tensioning member upper end and 2 top of reaction frame is fixed, next drawing part lower end and lateral load bar
7 fix；
(3) concrete sample of periphery package rubber sleeve 43 is fixed with test specimen fixed ring 32, fixed position is concrete
The intermediate position of test specimen；
(4) installation a thousand pieces of gold top 8 and first pressure sensor 9 between two pieces of fixed blocks 6 and lateral load bar 7, according to curved
The needs of bent load add load adjusting gasket 34 in test specimen fixed ring 32 and flushly mount with electric cylinder 31 and therewith
Two pressure sensors 33；
(5) it will seal and connect with rubber sleeve 43 after perfusion brine in Markov bottle 44, concrete is adjusted by air inlet pipe 45
Test specimen invades no height, invades and does not have above section to carry out water salt supplement by 42 capillarity of sandy soil；
(6) simultaneous equal adjusts the first jack 8 in tensioning system, pushes lateral load bar 7 to move down and forces its drawing
Concrete sample is stretched, stops load when first pressure sensor 9 reaches setting numerical value, at this moment concrete axial tension stress is：
Wherein, σ1For concrete sample axial tension stress, F1Show that pressure value, A are tried for concrete for first pressure sensor
Part area of section；
(7) adjust the second jack 31 in bending loading system, push test specimen fixed ring 32, make concrete sample by
Eccentricity pressure stops load when data collector 5 collects when pressure reaches setting numerical value, then the second jack 31 is to concrete
Test specimen apply moment be：
Wherein, M is the Maximum bending moment for the bending loading system that concrete sample is born, F2It is aobvious for second pressure sensor
The pressure value shown, L are concrete sample length；
(8) concrete sample is completed in experiment to take out, is placed on omnipotent concrete compression test and obtains concrete sample
Axial compressive strength standard value, and suggest that relational expression obtains cubic compressive strength standard value used in engineering practice by specification,
The cubic compressive strength standard value calculation formula is：
Wherein, fcu,kFor cubic compressive strength standard value, fckFor axial compressive strength standard value, αc1For prism intensity
With the ratio (Code for design of concrete structures GB 50010-2010) of cube strength, αc2For Brittleness of Concrete coefficient (concrete
Code for structural design GB 50010-2010).
Claims (7)
1. a kind of device of test eccentric tension concrete durability, which is characterized in that including：
Testing stand；
Reaction frame is fixed on testing stand, and reaction frame sidewall symmetry is equipped with two pieces of fixed blocks, is equipped with along anti-below the fixed block
The lateral load bar that power frame moves up and down；
Tensioning system is divided into tensioning member and next drawing part, the upper tensioning member upper end and fixed at the top of reaction frame, the drop-down
It stretches part lower end to fix with lateral load bar, the upper tensioning member lower end is equipped with adhesive panel, the fixation with next drawing part upper end
It is symmetrical arranged the first jack between block and lateral load bar；
It is bent loading system, is mounted on reaction frame side wall, for providing bending load to concrete sample；
The condition test circulatory system, the experimental enviroment for providing concrete sample；
Data acquisition controller is electrically connected with tensioning system and bending loading system；
The bending loading system includes：
Second jack, the second pressure sensor being fixed between the second very heavy top/bottom part and reaction frame side wall, for fixing
The test specimen fixed ring of concrete sample, top and the test specimen fixed ring of second jack offset.
2. the device of test eccentric tension concrete durability according to claim 1, which is characterized in that the upper stretching
By fixed at the top of flexural pivot and reaction frame, the next drawing part lower end is fixed by flexural pivot and lateral load bar for part upper end.
3. the device of test eccentric tension concrete durability according to claim 1, which is characterized in that the adhesive panel
For copper coin.
4. the device of test eccentric tension concrete durability according to claim 3, which is characterized in that the upper stretching
Part lower end, next drawing part upper end are arranged symmetrically bolt by 8 and adhesive panel is fixed.
5. the device of test eccentric tension concrete durability according to claim 1, which is characterized in that the jack
First pressure sensor is equipped between lateral load bar, the first pressure sensor is electrically connected with data acquisition controller.
6. the device of test eccentric tension concrete durability according to claim 1, which is characterized in that the condition examination
It is that salt loses system to test the circulatory system, and salt erosion system includes：
Rubber sleeve is wrapped on the outside of concrete sample, the gap between being used in combination sandy soil to fill；
Sealing rubber ring is located at concrete sample end and seals concrete sample and rubber sleeve；
Markov bottle is equipped with brine, is connected with rubber sleeve, and adjust brine by air inlet pipe invades no height in concrete sample.
7. the device of test eccentric tension concrete durability according to claim 1, which is characterized in that the condition examination
It is freezing and thawing system to test the circulatory system, and the freezing and thawing system includes：
Rubber sleeve is wrapped on the outside of concrete sample, the gap between being used in combination sandy soil to fill；
Sealing rubber ring is located at concrete sample end and seals concrete sample and rubber sleeve；
Markov bottle is equipped with pure water, is connected with rubber sleeve, and adjust pure water by air inlet pipe invades no height in concrete sample；
Freezing-thawing chamber wraps up the testing stand, reaction frame, tensioning system and bending loading system to provide freeze thawing ring
Border.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820175250.2U CN208043552U (en) | 2018-02-01 | 2018-02-01 | A kind of device of test eccentric tension concrete durability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820175250.2U CN208043552U (en) | 2018-02-01 | 2018-02-01 | A kind of device of test eccentric tension concrete durability |
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| Publication Number | Publication Date |
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| CN208043552U true CN208043552U (en) | 2018-11-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181175A (en) * | 2018-02-01 | 2018-06-19 | 塔里木大学 | A kind of device and method for testing eccentric tension concrete durability |
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2018
- 2018-02-01 CN CN201820175250.2U patent/CN208043552U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181175A (en) * | 2018-02-01 | 2018-06-19 | 塔里木大学 | A kind of device and method for testing eccentric tension concrete durability |
| CN108181175B (en) * | 2018-02-01 | 2024-03-08 | 塔里木大学 | Device and method for testing durability of eccentric tension concrete |
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