CN105388107A - Protective coating adhesion effect test device and test method under action of uniaxial tension - Google Patents
Protective coating adhesion effect test device and test method under action of uniaxial tension Download PDFInfo
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- CN105388107A CN105388107A CN201510220798.5A CN201510220798A CN105388107A CN 105388107 A CN105388107 A CN 105388107A CN 201510220798 A CN201510220798 A CN 201510220798A CN 105388107 A CN105388107 A CN 105388107A
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Abstract
The invention is suitable for the technical field of bridge anti-corrosion engineering coating performance tests, and discloses a protective coating adhesion effect test device under the action of uniaxial tension. The test device comprises test pieces, a fixation system, a loading system and a recording system, and the test device needs to be matched with a large hydraulic servo structure tester for use. The test pieces are composed of a concrete block and steel plates with holes; the fixation system comprises a concrete counter-force foundation and a fixture used for fixing the experimental test pieces; the loading system comprises clamping plates, bolts, a lower connector and an upper connector; the recording system comprises a strain gauge and a pressure sensor. According to the protective coating adhesion effect test device under the action of the uniaxial tension, operation is flexible, and fixation is simple; by means of the method of adjusting the loading system, changing the sizes of the test pieces, changing the loading mode and the like, the tests of the bond value, protective coating damage and the like of the protective coating and the concrete and protective components under the action of axial loading, the action of eccentric loading, the size effect of the test pieces and the action of vibration fatigue are achieved.
Description
Technical field
The present invention relates to protective coating adhesion effect test unit and test method under a kind of uniaxial tension effect, be applicable to bridge anticorrosion engineering performance study, belong to technical field of measurement and test.
Background technology
The anchor system of Large bridge beam bridge (suspension bridge) is the pith in its bearing support system, plays conclusive effect to bridge resistance to overturning.Anchor system is generally formed by anchoring steel construction and concreting.When bridge builds up, there is discharge moment, the steel construction now in anchor system bears huge tensile load effect, deforms.If the direct and concreting by steel construction, because the cohesive force between steel construction and concrete is comparatively large, in discharge moment, concrete rupture may be caused to damage.For head it off, current common method is: at part steel construction outer layer covers class A foam A material, to reduce the cohesive force between steel construction and concrete.Although this kind of method can solve because discharge causes the problem of concrete destruction effectively, but because of exist between steel construction and concrete compared with wide arc gap and class A foam A material antiseptic poor, steel construction in anchor system is easily corroded, hydraulic performance decline, thus affect the resistance to overturning of bridge structure, reduce tenure of use.Therefore, start both at home and abroad at present to consider that the anticorrosion protective coating method of employing solves the problem solving load releasing and bring.Because anticorrosion protective coating has superior antiseptic property, can effectively delay steel construction corrosion, thus improve the serviceable life of engineering structure, be widely used at present in corrosion environment engineering field.But whether it can solve discharge problem, depends primarily on itself and concrete adhesive property.Therefore anticorrosion protective coating is studied and concrete adhesive property is most important.In sum, protective coating bond effect test unit and test method under a kind of stretching action is researched and developed significant.
Summary of the invention
For above-mentioned problem demanding prompt solution, invention provides protective coating adhesion effect test unit and test method under a kind of uniaxial tension effect, and by regulating loading system, change sample dimensions, change the method such as load mode, realize protective coating and concrete under axle center loading effect, bias-load effect, sample dimensions effect, vibrations fatigue effect and protect the test of the bond effect (cohesive force numerical value, protective coating destruction situation etc.) built.
For achieving the above object, the technical solution used in the present invention is: test unit comprises test specimen, fixed system, loading system and register system; Test specimen comprises concrete block and steel plate with holes composition; Fixed system comprises concrete counter-force ground and the fixture for fixation test test specimen; Loading system comprises clamping plate, bolt, lower chaining part and upper chaining part; Register system comprises foil gauge, pressure transducer.
Further, when doing axle center tension test, need to finely tune test specimen position, to prevent bias-load.
Further, can to test specimen application different materials protective coating and different-thickness protective coating, with the impact on protective coating and concrete binding power of the Study of the Realization protective coating kind and protective coating thickness.
Further, the size of steel plate test specimen and concrete sample can be changed, with the impact of the Study of the Realization size effect on protective coating and concrete binding power.
Further, can change loading system, as clamping plate being placed on the side of steel plate test specimen and lower web member, under realizing bias-load effect, protective coating and concrete binding effect, can change the thickness of clamping plate, the distance of adjusted bias simultaneously.
The technical solution adopted in the present invention has following steps: make steel plate test specimen according to design size, according to protective coating design proposal, application is carried out to steel plate, foil gauge is sticked in steel plate test specimen midline, make concrete-steel plate stretching test specimen, test specimen is positioned on ground, with reference to the vertical direction of testing machine actuator, the position of adjustment test specimen, make its centering, screw rod and bolt is utilized to be fixed on counter-force ground, with clamping plate, test steel plate and lower web member are fixed, lower web member is connected with pressure transducer rigidity spiral shell head, upper connector is connected with pressure transducer rigidity spiral shell head, upper connector is connected with testing machine actuator.Foil gauge lead-in wire is connected with strainmeter with pressure transducer lead-in wire, dummy ga(u)ge, debugging large hydraulic servo structure testing machine.Start servo to test, the corresponding strain of record and pulling force, can adopt substep to load, also can adopt continuous load mode.After off-test, first unload, then extract chain fishplate and standing screw, take out concrete sample and steel plate test specimen, observe its collapse state.
The invention has the beneficial effects as follows: flexible operation of the present invention, fixing simple; And by regulating loading system, change sample dimensions, change the method such as load mode, realize protective coating and concrete under axle center loading effect, bias-load effect, sample dimensions effect, vibrations fatigue effect and protect the test of the bond effect (cohesive force numerical value, protective coating destruction situation etc.) built.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention; 1. concrete counter-force ground; 2. stationary fixture; 3. concrete sample; 4. post foil gauge and through the steel plate test specimen of application; 5. clamping plate; 6. descend web member; 7 pressure transducers; 8. upper connector.
Fig. 2 is fixed system schematic diagram of the present invention; 2-1. concrete counter-force ground; 2-2. pad; 2-3. screw rod; 2-4. nut; 2-5. box fixture; 2-6. bolt hole.
Fig. 3 is test test specimen schematic diagram of the present invention; 3-1. concrete sample; 3-2. steel plate test specimen; 3-3. bolt hole; 3-4. protective coating; 3-5. foil gauge.
Fig. 4 is fixture of the present invention and coupling arrangement schematic diagram; 4-1. bolt; 4-2. clamping plate; 4-3. rib version; 4-4. solid rigidity spiral shell head; 4-5. links steel plate; Web member under 4-6.; 4-7 nut; 4-8. pad.
Fig. 5 is coupling arrangement schematic diagram of the present invention; 5-1. upper connector; 5-2. bolt; 5-3. solid rigidity cylindricality connecting link; 5-4. solid rigidity spiral shell head; 5-5. bolt hole; 5-6. bolt.
Fig. 6 is pressure transducer schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Test unit comprises test specimen; Fixed system, loading system and register system; Test specimen comprises concrete block 2-1, steel plate 2-2 with holes, protective coating 2-3; Fixed system comprises concrete counter-force ground 3-1, pad 3-2, screw rod 3-3, nut 3-4 and box cushion block 3-5; Loading system comprises clamping plate 4-2, and lower chaining part 6 comprises floor 4-3, rigidity spiral shell head 4-4, cushion block 4-5 and steel plate 4-6 with holes, and upper connector 8 comprises steel plate 5-1 with holes, rigidity right cylinder 5-3 and rigidity spiral shell head 5-4; Register system comprises foil gauge 3-5 and pressure transducer 7.
When doing axle center tension test, need fine setting test specimen 3-1, to prevent bias-load.
Can to test specimen application different materials protective coating 3-4 and different-thickness protective coating 3-4, with the impact on protective coating 3-4 and concrete 3-1 cohesive force of the Study of the Realization protective coating 3-4 kind and protective coating 3-4 thickness.
The size of steel plate test specimen 3-2 and concrete sample 3-1 can be changed, with the impact of the Study of the Realization size effect on protective coating 3-4 and concrete 3-1 cohesive force.
Loading system can be changed, as clamping plate 4-2 being placed on the side of steel plate test specimen 3-2 and lower connection steel plate 4-6 with holes, under realizing bias-load effect, protective coating 3-4 and concrete 3-1 bond effect, the thickness of clamping plate 4-2 can be changed, the distance of adjusted bias simultaneously.
The technical solution adopted in the present invention has following steps: make steel plate test specimen 3-2 according to design size, according to protective coating 3-4 design proposal, application is carried out to steel plate test specimen 3-2, foil gauge 3-5 is sticked in steel plate test specimen 3-2 midline, make concrete-steel plate stretching test specimen, test specimen is positioned over 2-1 on counter-force ground, with reference to the vertical direction of testing machine actuator, the position of adjustment test specimen, make its centering, screw rod 2-3 is utilized to be fixed in 2-1 on counter-force ground, with clamping plate 4-2, test steel plate 3-2 and lower web member 6 are fixed, lower web member 6 is connected with pressure transducer 7 rigidity spiral shell head 4-4, upper connector 8 is connected with pressure transducer 7 rigidity spiral shell head 5-4, upper connector 8 is connected with testing machine actuator bolt 5-6.Foil gauge is drawn 3-5 line and pressure transducer 7 to go between and to be connected with strainmeter 10, dummy ga(u)ge 3-5, debugging large hydraulic servo structure testing machine.Start servo to test, the corresponding strain of record and pulling force, can adopt substep to load, also can adopt continuous load mode.After off-test, first unload, then extract chain fishplate 4-2 and standing screw 2-3, take out concrete sample 3-2 and steel plate test specimen 3-2, observe its collapse state.
Claims (6)
1. protective coating adhesion effect test unit and a test method under uniaxial tension effect, it is characterized in that, test unit comprises test specimen, fixed system, loading system and register system.Test specimen comprises concrete block and steel plate with holes composition; Fixed system comprises concrete counter-force ground and the fixture for fixation test test specimen; Loading system comprises clamping plate, bolt, lower chaining part and upper chaining part; Register system comprises foil gauge, pressure transducer.
2. protective coating adhesion effect test unit and test method under a kind of uniaxial tension effect according to claim 1, is characterized in that, when doing axle center tension test, needs to finely tune test specimen position, to prevent bias-load.
3. protective coating adhesion effect test unit and test method under a kind of uniaxial tension effect according to claim 1, it is characterized in that, can to test specimen application different materials protective coating and different-thickness protective coating, with the impact on protective coating and concrete binding power of the Study of the Realization protective coating kind and protective coating thickness.
4. protective coating adhesion effect test unit and test method under a kind of uniaxial tension effect according to claim 1, it is characterized in that, the size of steel plate test specimen and concrete sample can be changed, with the impact of the Study of the Realization size effect on protective coating and concrete binding power.
5. protective coating adhesion effect test unit and test method under a kind of uniaxial tension effect according to claim 1, it is characterized in that, loading system can be changed, as clamping plate being placed on the side of steel plate test specimen and lower web member, under realizing bias-load effect, protective coating and concrete binding effect.
6. protective coating bond effect test unit and test method under a kind of eccentric tension effect according to claim 5, is characterized in that the thickness that can change clamping plate, the distance of adjusted bias.
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| CN201510220798.5A CN105388107A (en) | 2015-05-04 | 2015-05-04 | Protective coating adhesion effect test device and test method under action of uniaxial tension |
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| CN201510220798.5A CN105388107A (en) | 2015-05-04 | 2015-05-04 | Protective coating adhesion effect test device and test method under action of uniaxial tension |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644933A (en) * | 2016-12-15 | 2017-05-10 | 长安大学 | Testing method of interlayer bonding power of asphalt pavement |
| CN107063840A (en) * | 2016-11-30 | 2017-08-18 | 内蒙动力机械研究所 | A kind of device for solid rocket motor case list skirt axis pulling experiment |
| CN108106992A (en) * | 2017-12-19 | 2018-06-01 | 中建材中岩科技有限公司 | Test about Bond Strength method under the conditions of the infiltration of coating material pressure |
| CN111504807A (en) * | 2020-06-03 | 2020-08-07 | 吉林大学 | Device and method for testing bonding strength of waterproof coating of swivel spherical hinge steel-concrete interface |
| CN111751213A (en) * | 2020-07-13 | 2020-10-09 | 大连理工大学 | Device for testing tensile rigidity and adhesive force of coating |
| CN113624678A (en) * | 2021-07-28 | 2021-11-09 | 华侨大学 | On-site testing device and method for tangential bonding strength of steel structure fireproof coating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111504807A (en) * | 2020-06-03 | 2020-08-07 | 吉林大学 | Device and method for testing bonding strength of waterproof coating of swivel spherical hinge steel-concrete interface |
| CN111751213A (en) * | 2020-07-13 | 2020-10-09 | 大连理工大学 | Device for testing tensile rigidity and adhesive force of coating |
| CN113624678A (en) * | 2021-07-28 | 2021-11-09 | 华侨大学 | On-site testing device and method for tangential bonding strength of steel structure fireproof coating |
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