CN205246449U - Concrete member applys test device of axial tension load - Google Patents
Concrete member applys test device of axial tension load Download PDFInfo
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- CN205246449U CN205246449U CN201520976068.3U CN201520976068U CN205246449U CN 205246449 U CN205246449 U CN 205246449U CN 201520976068 U CN201520976068 U CN 201520976068U CN 205246449 U CN205246449 U CN 205246449U
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Abstract
Concrete member applys test device of axial tension load draws the test piece, adorns in the concrete axle including the concrete axle and draws bearing the weight of the steel sheet, take internal screw thread T type built -in fitting, bearing the weight of screw rod and strainometer of test piece both ends, and the concrete axle draws the test piece to be equipped with the reservation through -hole that the axial was arranged, and the concrete axle draws test piece both ends pre -buried a plurality of T type built -in fittings respectively, and the directional concrete axle of screw section of T type built -in fitting draws the test piece outside, bearing the screw rod and running through the reservation through -hole, bearing screw rod both ends configuration nut, the nut outside is furnished with the steel sheet of bearing, the screw thread section and the fastening bolt spiro union of T type built -in fitting, the strainometer is installed and is drawn the test piece lateral wall at the concrete axle, and the signal output part of strainometer links with outside strain gauge electricity. The beneficial effect of the utility model mainly show: loading device can overcome the difficulty of exerting the xial feed, easy operation, with low costs and not corrosion, ability used repeatedly, test device is small, the screw rod both ends have fine screw thread, and the loading is laborsaving, the easy control of load size.
Description
Technical field
The utility model relates to a kind of concrete component and applies the experimental rig of axial tension load.
Background technology
Xoncrete structure in military service process is all worked under load and environment acting in conjunction,Without the rationally residing reality of reflect structure of achievement in research of concrete durability under load actionBorder state. Xoncrete structure, in bearing load effect, often stands seawater, deicer saltsWith erosions such as carbon dioxide, load and environment is dual or multiple factors coupling under, coagulationSoil structures often do not reach design period just the accident of destruction happen occasionally, that brings thus is hugeLarge economic loss and casualties, caused extensive concern both domestic and external. Concrete is typicalPorous material, etching medium is invaded inside concrete by concrete pore just, causes thusSteel bar corrosion, crack, and then affect concrete military service performance. Load is doneWith etching medium is mainly reflected in to the impact of transmitting in concrete: load damage makes concreteInner generation micro-crack, thus accelerate the transfer rate of etching medium in concrete.
The impact of research load action on medium transmission, main consideration at present continues load action.Because bending load loads easily, be widely adopted, and occurred successively two beams of concretes againThe test methods such as the back-to-back lasting loading of test specimen, lasting loading based on lever principle, to carry outVillaumite transmission test research under load action. But, due to high along Sectional Dimension of Reinforced Concrete BeamDegree load degree of injury difference, is difficult to load damage to be determined the impact of medium transmission speedComponent analysis, result of study also can only obtain some conclusions qualitatively. From load action, medium is passedDefeated impact, tensile load is the most outstanding on the impact of medium transmission. Axle draws load actionUnder, in concrete sample, load damage evenly, can, in conjunction with endurancing, effectively be set upPass between load action and medium transmission is that durability prediction, structural design provide reference.
Different with axial compression test, direct tensile test is because needs clamp concrete two endsThere is very large difficulty, and be difficult to realize test specimen axle center and grip of testing machine center, based on axleThe report that heart tension load applies is comparatively rare, and the main method adopting is that concrete is tried at presentPart is made two ends major part " dog bone " test specimen and is beneficial to clamping, at test specimen and testing machine intersectionBall pivot is set and reduces test specimen and the testing machine error that effectively centering is brought. For example, ChinaPatent announcement CN104330314A, Shen Qing Publication day is on February 4th, 2015, titleFor " for the clamping mechanism of the direct hot strength testing arrangement of superhigh temperature ceramics high temperature ", ChinaLicense notification number CN103175733B, Granted publication day is on July 2nd, 2015,Name is called " the direct tensile test fixture of incompressible material ", Chinese patent application publication No.CN103267682A, Shen Qing Publication day is on August 28th, 2013, name is called " tensionTesting arrangement and the method for testing of creeping with material under environment coupled action ". These devices and sideMethod is drawn in test method and is had and can use for reference part at concrete axial, but experimental rig relative complex,Cost is high, volume is large, operation requirements is high, cannot be positioned over manually together with concrete sampleEnvironmental cabinet or be soaked in and carry out etching medium transmission test in salting liquid.
Visible, design that a kind of volume is little, simple to operate, method is reliable, cost is low, and canTo be co-located on the charger of testing in erosion environment in company with concrete sample, to researchUnder load action, concrete medium transporting mechanism is most important, and durability based on this deviceAchievement in research is also by concrete structure durability prediction and the xoncrete structure based on durabilityDesign provides basic guarantee.
Summary of the invention
Draw the problem of load loading method in order to overcome existing concrete members shaft, the utility modelProvide that a kind of volume is little, simple to operate, method is reliable, with low cost, facilitate concrete componentApply axial tension load, and can be co-located on erosion environment together with concrete component and be situated betweenThe concrete component of matter erosion test applies the experimental rig of axial tension load.
Concrete component described in the utility model applies the experimental rig of axial tension load, itsBe characterised in that: comprise that concrete axial draws test specimen, is loaded on concrete axial and draws the carrying steel at test specimen two endsPlate, tapped T-shaped built-in fitting, carrying screw rod and strain gauge, described concrete axial drawsTest specimen is provided with the reserved through hole of axial arranging, and described concrete axial draws test specimen two ends pre-buried respectivelyMultiple T-shaped built-in fittings, and the thread segment of described T-shaped built-in fitting sensing concrete axial drawsTest specimen outside; Described carrying screw rod runs through reserved through hole, and at described carrying screw rod two endsConfiguration nut, described nut outside is furnished with carrying steel plate, the screw thread of described T-shaped built-in fittingSection is spirally connected with fastening bolt, ensures that described carrying steel plate and described concrete axial draw test specimen endFace laminating; Described strain gauge is arranged on described concrete axial and draws test specimen sidewall, and described shouldBecoming the signal output part of meter and outside deformeter is electrically connected.
Described concrete axial draws the reserved through hole of test specimen to be arranged on concrete axial and draws the several of test specimenWhat centre of form place, and keep the reserved central shaft of through hole and the central shaft of concrete axial tensile test specimenOverlap.
Described concrete axial draws the two ends of test specimen to be provided with the pit coaxial with reserving through hole, andThe size of pit is mated with nut.
Described concrete axial draws the two ends of test specimen to leave outstanding flange, the edge of a wing and concrete sampleWith wide.
Described carrying steel plate setting and fastening bolt install one to one through hole and with in advanceStay the reserved circular hole that through hole is corresponding, wherein said reserved circular hole is arranged on how much of carrying steel plateCentre of form place, reserved circular is round the faulting of slab ends mating with nut; Described nut is placed in mixedIn solidifying native pit and carrying steel plate faulting of slab ends.
The screw diameter of described carrying screw rod mates with reserved through hole, and screw rod two ends are with outer spiral shellLine, screw rod two ends have the parallel surface for spanner clamping, and two ends hand of spiral is contrary, describedCarrying screw rod and described nut formation self-locking structure.
Described strain gauge adopts foil gauge, amesdial or displacement transducer, in order to reflect loadThe impact of effect on concrete damage.
Described carrying screw rod adopts corrosion resisting stainless steel.
Described carrying steel plate, fastening bolt and T-shaped built-in fitting can be tight before casting concreteGu for entirety, draw the template used end mould of test specimen as casting concrete axle, can ensure T-shaped pre-The accurate pre-buried location of embedded part, carrying steel plate and fastening bolt can Reusabilities.
Operation principle: cross section, the edge of a wing of the present utility model is trapezoidal, is become by standard size steel moldType, while specifically use, installs after carrying screw rod, nut and carrying steel plate, by rotation two endsMake two ends nut produce the thrust that puts on carrying steel plate with the carrying screw rod of anti-silk fine thread,Thereby realize applying of axial tension load, load is by the strain gauge that is fixed on test specimen both sidesQuantitatively. Carrying screw rod concrete constraint carrying screw rod around prevents from carrying in loading procedure screw rodUnstability. Apply test specimen that axle draws load and can be placed in environmental cabinet and carry out medium transmission research, alsoCan in medium transmission test, apply continuous fluctuating load, continue load or gradually to determineThe impact of time dependent loading on medium transmission.
The beneficial effects of the utility model are mainly manifested in:
1. charger can overcome the difficulty that applies xial feed, simple to operate, and cost is lowAnd not corrosion, can reuse;
2. experimental rig volume is little, additionally takes up room hardly, can apply continue load andVariable load, can meet and continue concrete endurancing under tensile load;
3. screw rod two ends are with fine thread, load laborsavingly, and load is easy to control, and screw rod is straightMate with concrete preformed hole in footpath, and screw rod is unstability not, and screw rod two ends are furnished with nut, avoid coagulationSoil fracture separates.
Brief description of the drawings
Fig. 1 is apparatus structure schematic diagram of the present utility model.
Fig. 2 is that axle draws concrete sample schematic diagram.
Fig. 3 is carrying screw rod and supporting nut schematic diagram.
Fig. 4 is carrying steel plate schematic diagram.
Fig. 5 is the influence curve that axle draws load to distribute to Chloride Ion in Concrete.
Detailed description of the invention
Further illustrate the utility model below in conjunction with accompanying drawing
With reference to accompanying drawing:
Embodiment 1 concrete component described in the utility model applies the examination of axial tension loadExperiment device, comprises that concrete axial draws test specimen 1, is loaded on concrete axial and draws the carrying steel at test specimen two endsPlate 7, tapped T-shaped built-in fitting 5, carrying screw rod 3 and strain gauge 8, described is mixedSolidifying native axle draws test specimen 1 to be provided with the reserved through hole 2 of axial arranging, and described concrete axial draws test specimen1 two ends are pre-buried multiple T-shaped built-in fittings 5 respectively, and the screw thread of described T-shaped built-in fitting 5Duan Zhixiang concrete axial draws test specimen 1 outside; Described carrying screw rod 3 runs through reserved through hole 2,And at described carrying screw rod 3 two ends configuration nuts 4, described nut 4 outsides are furnished with carryingSteel plate 7, thread segment and the fastening bolt 6 of described T-shaped built-in fitting 5 are spirally connected, described in guaranteeCarrying steel plate 7 draw test specimen 1 end face laminating with described concrete axial; Described strain gauge 8Be arranged on described concrete axial and draw test specimen 1 sidewall, the signal output part of described strain gauge withOutside deformeter is electrically connected.
Described concrete axial draws the reserved through hole 2 of test specimen 1 to be arranged on concrete axial and draws test specimen 1Geometric centroid place, and keep central shaft and the concrete axial tensile test specimen 1 of reserved through hole 2Central shaft overlap.
Described concrete axial draws the two ends of test specimen 1 to be provided with the pit coaxial with reserving through hole 29,And the size of pit 9 is mated with nut 4.
Described concrete axial draws the two ends of test specimen 1 to leave outstanding flange, the edge of a wing and concrete examinationPart is with wide.
Described carrying steel plate 7 arrange with fastening bolt 6 install one to one through hole 73 withAnd the reserved circular hole 71 corresponding with reserved through hole 2, wherein said reserved circular hole 71 is arranged onThe geometric centroid place of carrying steel plate 7, reserved circular hole 71 is around round the faulting of slab ends mating with nut72; Described nut 4 is placed in concrete pit 9 and carrying steel plate faulting of slab ends 72.
The screw diameter of described carrying screw rod 3 mates with reserved through hole 2, screw rod two ends withExternal screw thread, screw rod two ends have the parallel surface for spanner clamping, and two ends hand of spiral is contrary, instituteThe carrying screw rod of stating and described nut form self-locking structure.
Described strain gauge 8 adopts foil gauge, amesdial or displacement transducer, in order to reflect lotusCarry the impact of effect on concrete damage.
Described carrying screw rod 3 adopts corrosion resisting stainless steel.
Described carrying steel plate 7, fastening bolt 6 and T-shaped built-in fitting 5 can built coagulationFastening before soil is entirety, draws the template used end mould of test specimen as casting concrete axle, can ensureThe accurate pre-buried location of T-shaped built-in fitting, carrying steel plate and fastening bolt can Reusabilities.
Embodiment 2 is below to measure the ratio of mud 0.53, match ratio as cement: water: sand: coarse aggregateThe concrete of=1:0.53:2.0:3.0 villaumite transmitting procedure under axial tension load action is example,Work of the present utility model is illustrated.
The concrete raw material of this embodiment mixing are: cement is P.I525 class a portland cement,Sand adopts the river sand of modulus of fineness 2.6, and coarse aggregate adopts the rubble (maximum particle diameter of continuous grading25mm), hydromining running water. In Standard Module, build axle and draw concrete sample effective cross-sectionBe of a size of 100mm × 100mm, the outstanding length in the edge of a wing is 50mm, edge of a wing brim height100mm, test specimen length 1000mm, at concrete sample two ends each pre-buried 8 T-shaped pre-buriedPart, the reserved through hole 2 of the reserved diameter 26mm in test specimen center, builds after moulding in fog roomStandard curing 28d, 4 of test specimen quantity.
Draw in the reserved through hole 2 of concrete sample 1 through carrying screw rod 3, screw rod two ends at axleThe nut 4 of screwing on, makes two ends nut 4 embed the recessed of concrete sample two ends by rotary screw 3Hole 9, installs the carrying steel plate 7 at two ends, and the outstanding concrete sample 1 of nut 4 is partially submerged intoThe pit 72 of carrying steel plate 7, fastening bolt 6 passes the hole 73 of carrying steel plate with T-shaped pre-buriedPart 5 connects to be tightened, and ensures that 16, two ends fastening bolt 6 screw-down torques are identical.
Paste the foil gauge 8 that length is 50mm in concrete sample side, being connected by wire shouldBecome instrument. Adopt spanner rotation carrying screw rod 3 that nut 4 is moved to screw rod 3 two ends, not stopping pregnancyRaw extrapolability, by strain-ga(u)ge reading control target load level, target strain is respectively 0,40 μ ε,70με，100με。
The axle that loading is completed draws concrete sample 1 except a side, and its excess-three side is usedEpoxy sealing soaks and makes the concrete water of satisfying in running water. Then in environment temperature 40In DEG C salting liquid that villaumite concentration is 3.5%, soak 60 days, after drying in air perpendicular toAxle draws in concrete sample 1 side face directions along degree of depth 0-5mm, 5-10mm, and 10-15mm,15-20mm, 20-25mm, 25-30mm, 30-40mm, 40-50mm depth intervals drills throughPowder, carries out chemical analysis to powder sample, measures chlorine ion concentration and distributes. Axle draws load shadowChlorine ion concentration under ringing distributes as shown in Figure 5.
When specific implementation, the utility model does not limit concrete device model, to concreteSample dimensions does not limit, as long as it is equal to complete charger and the concrete sample of above-mentioned functionsCan.
Finally, it should be noted that above enumerate only for measure axle draw load to concreteThe specific embodiment of middle chloride profiles impact, does not limit the utility model. For adopting thisDevice carries out other parametric measurements of concrete durability, only needs to change the environment of concrete sampleCondition, loading procedure and method are in full accord, repeat no more herein.
Content described in this description embodiment is only the way of realization to utility model designEnumerate, protection domain of the present utility model should not be regarded as only limiting to that embodiment statesConcrete form, protection domain of the present utility model also comprises that those skilled in the art are according to this practicalityThe equivalent technologies means that novel design can be expected.
Claims (7)
1. concrete component applies the experimental rig of axial tension load, it is characterized in that: bagDrawing together concrete axial draws test specimen, is loaded on carrying steel plate, band internal thread that concrete axial draws test specimen two endsT-shaped built-in fitting, carrying screw rod and strain gauge, described concrete axial draws test specimen to be provided with axiallyThe reserved through hole of arranging, described concrete axial draws test specimen two ends pre-buried multiple T-shaped pre-buried respectivelyPart, and the thread segment of described T-shaped built-in fitting sensing concrete axial draws test specimen outside; DescribedCarrying screw rod run through reserved through hole, and at described carrying screw rod two ends configurations nut, described inNut outside be furnished with carrying steel plate, the thread segment of described T-shaped built-in fitting and fastening bolt spiral shellConnect, the carrying steel plate described in ensureing and described concrete axial draw the laminating of test specimen end face; DescribedStrain gauge is arranged on described concrete axial and draws test specimen sidewall, the signal output of described strain gaugeEnd is electrically connected with outside deformeter.
2. concrete component as claimed in claim 1 applies the test dress of axial tension loadPut, it is characterized in that: described concrete axial draws the reserved through hole of test specimen to be arranged on concrete axialDraw the geometric centroid place of test specimen, and keep central shaft and the concrete axial stretching examination of reserved through holeThe central shaft of part overlaps.
3. concrete component as claimed in claim 2 applies the test dress of axial tension loadPut, it is characterized in that: described concrete axial draws the two ends of test specimen to be provided with to reserve through hole coaxialPit, and the size of pit is mated with nut.
4. concrete component as claimed in claim 3 applies the test dress of axial tension loadPut, it is characterized in that: described concrete axial draws the two ends of test specimen to leave outstanding flange, the edge of a wingWith concrete sample with wide.
5. concrete component as claimed in claim 1 applies the test dress of axial tension loadPut, it is characterized in that: the described setting of carrying steel plate and fastening bolt are installed logical one to oneHole and the reserved circular hole corresponding with reserved through hole, wherein said reserved circular hole is arranged on carryingThe geometric centroid place of steel plate, reserved circular is round the faulting of slab ends mating with nut; Described spiral shellCap is placed in concrete pit and carrying steel plate faulting of slab ends.
6. concrete component as claimed in claim 3 applies the test dress of axial tension loadPut, it is characterized in that: the screw diameter of described carrying screw rod mates with reserved through hole, screw rodTwo ends are with external screw thread, and screw rod two ends have the parallel surface for spanner clamping, two ends hand of spiralOn the contrary, described carrying screw rod and described nut form self-locking structure.
7. concrete component as claimed in claim 1 applies the test dress of axial tension loadPut, it is characterized in that: described strain gauge adopts foil gauge, amesdial or displacement transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520976068.3U CN205246449U (en) | 2015-12-01 | 2015-12-01 | Concrete member applys test device of axial tension load |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520976068.3U CN205246449U (en) | 2015-12-01 | 2015-12-01 | Concrete member applys test device of axial tension load |
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| CN205246449U true CN205246449U (en) | 2016-05-18 |
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| CN201520976068.3U Withdrawn - After Issue CN205246449U (en) | 2015-12-01 | 2015-12-01 | Concrete member applys test device of axial tension load |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424478A (en) * | 2015-12-01 | 2016-03-23 | 浙江工业大学 | Test device for axial tension load applied by concrete member |
| CN108254247A (en) * | 2017-12-21 | 2018-07-06 | 中国水利水电科学研究院 | The apparatus and method for of single axle concrete constraint under a kind of difference curing condition |
| WO2019206071A1 (en) * | 2019-01-04 | 2019-10-31 | 山东科技大学 | Embedded-type anchor device for tensile testing of rock, and testing method |
-
2015
- 2015-12-01 CN CN201520976068.3U patent/CN205246449U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424478A (en) * | 2015-12-01 | 2016-03-23 | 浙江工业大学 | Test device for axial tension load applied by concrete member |
| CN105424478B (en) * | 2015-12-01 | 2018-05-08 | 浙江工业大学 | Concrete component applies the experimental rig of axial tension load |
| CN108254247A (en) * | 2017-12-21 | 2018-07-06 | 中国水利水电科学研究院 | The apparatus and method for of single axle concrete constraint under a kind of difference curing condition |
| CN108254247B (en) * | 2017-12-21 | 2020-05-12 | 中国水利水电科学研究院 | Device and method for single-shaft concrete constraint under different curing conditions |
| WO2019206071A1 (en) * | 2019-01-04 | 2019-10-31 | 山东科技大学 | Embedded-type anchor device for tensile testing of rock, and testing method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160518 Effective date of abandoning: 20180508 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20160518 Effective date of abandoning: 20180508 |