CN102445385A - Bonding and anchoring device for fiber bar testing and application method thereof - Google Patents
Bonding and anchoring device for fiber bar testing and application method thereof Download PDFInfo
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- CN102445385A CN102445385A CN2011102983884A CN201110298388A CN102445385A CN 102445385 A CN102445385 A CN 102445385A CN 2011102983884 A CN2011102983884 A CN 2011102983884A CN 201110298388 A CN201110298388 A CN 201110298388A CN 102445385 A CN102445385 A CN 102445385A
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Abstract
The deformation performance and tensile strength of a fiber bar cannot be tested completely with the present conventional testing method. The invention provides a bonding and anchoring device for fiber bar testing and an application method thereof. The bonding and anchoring device for fiber bar testing comprises a steel pipe with internal and external threads and an adhesive for bonding the end part of a fiber bar required to be anchored on the inner wall of the steel pipe, and is characterized in that: the thread pitch of the internal thread of the steel pipe is 1-2.5 millimeters; the adhesive is a modified epoxy resin adhesive obtained by mixing polyamide resin and epoxy resin in the mass ratio of 1:(0.9-1.2); the tensile strength and compressive strength of the cured adhesive are over 40 MPa and 70 MPa respectively; and the comprehensive elasticity modulus of the cured adhesive is over 2,500 MPa. Due to the adoption of the bonding and anchoring device for fiber bar testing, end part slippage of an anchored end in the stressed state can be prevented completely, the fiber bar is prevented from being damaged by shearing, and the deformation performance and tensile strength of the fiber bar can be tested completely.
Description
Technical field
The present invention relates to anchor, especially a kind of fiber muscle test is with bond-anchorage device and method of application thereof.
Background technology
Fiber muscle (claiming the FRP muscle again) is the abbreviation of fibre-forming polymer muscle; Because it has excellent corrosion resisting performance; And tensile strength is far above reinforcing bar; Replace the reinforcing bar in the xoncrete structure with it down in particular surroundings (coastal engineering, slope reinforcement engineering etc.), can improve the usability and the endurance quality of coagulation scholar structure greatly, thereby become the focus that global building engineering field is widely paid close attention to and studied in recent years.Fiber muscle with ribbing is because its good and concrete cooperative transformation performance obtain increasing application in engineering.
The fiber muscle is after adopting resin (mainly containing polyamide, polyvinyl resin, epoxy resin etc.) gummed by the multiply continuous fiber, through special mould extruding, drawing moulding.In experiments such as research fiber biceps performance; As adopt the conventional test machine directly to carry out load test from the method that carrying jig clips fiber muscle two ends; When load to certain phase, anchor clamps two ends fiber muscle sliding phenomenon is very obvious, can not measure the mechanical property of fiber muscle well; When the method that adopts common cone anchorage anchoring two ends is carried out load test; Though fiber muscle surface sliding phenomenon is resolved basically; But because the lower problem of self shearing strength; The muscle body very easily is sheared destruction in the experimentation, and therefore test can not obtain the actual tensile strength of fiber muscle.In sum, present conventional test method all can not completely be measured the deformation performance and the tensile strength of fiber muscle.
Summary of the invention
The objective of the invention is to solve the problem that conventional fibre biceps method for testing performance can not completely be measured the deformation performance of fiber muscle and draw intensity, a kind of anchoring property good (not slippage) is provided, shear failure does not take place, workable and make fiber muscle test simply and easily and use the bond-anchorage device.
The present invention adopts following technical scheme: the bond-anchorage device is used in the test of fiber muscle; Comprise the steel pipe of being with internal and external threads and be used for need anchoring fiber muscle end is bonded in the tackifier on the steel pipe inwall that it is characterized in that: the pitch of said steel pipe internal thread is 1～2.5mm; Described tackifier is the modified epoxide resin adhesive (field fabrication) that polyamide and epoxy resin mix by the 1:0.9-1.2 mass ratio; Tension after it solidifies and compressive strength are drawn elastic modulus greater than 2500 MPas respectively greater than 40 MPas and 70 MPas.
Fail to solve the problem that shear failure takes place easily for clamp ends slippage and muscle body in the fiber biceps performance test based on the conventional test method; The present invention at first adopts the steel pipe with internal and external threads as anchored end, so just can prevent fully that the end sliding phenomenon from appearring in anchored end under stress; Secondly, the present invention adopts high-strength plastic stick-modified epoxide resin adhesive, can shorten anchorage length effectively.
The bond-anchorage device is used in above-mentioned fiber muscle test, and the internal diameter of steel pipe is than the big 3～5mm of external thread diameter that needs anchoring fiber muscle, and the wall thickness of steel pipe is greater than 5mm.
Bond-anchorage device, steel pipe length>=f are used in above-mentioned fiber muscle test
t* d/79, wherein f
tBe the design tensile strength of fiber muscle with ribbing, d is the diameter of fiber muscle with ribbing.This kind steel pipe length is fiber muscle anchorage length with ribbing.
Bond-anchorage device, steel pipe length>=f are used in above-mentioned fiber muscle test
T1* d
1/ 98, f wherein
T1Be the design tensile strength of fiber muscle not with ribbing, d
1Diameter for fiber muscle not with ribbing.This kind steel pipe length is the anchorage length of fiber muscle not with ribbing.
The test of above-mentioned fiber muscle is with the method for application of bond-anchorage device, and its step is following: 1) with the inwall of acetone or alcohol wash steel pipe, and dry; 2) with glue one sheet metal is cemented in steel pipe one end; 3) modified epoxide resin adhesive is stirred after, slowly inject in the steel pipe along the steel pipe inwall; 4) will need the fiber muscular atonia of anchoring to insert slowly in the steel pipe that has been marked with modified epoxide resin adhesive, and in this process towards direction rotation fiber muscle, touch the sheet metal of bottom until the fiber muscle, remove the modified epoxide resin adhesive that overflows; 5) make its centre that is in steel pipe with centring ring anchoring fiber muscle, guarantee that the thickness of fiber muscle periphery tackifier is even; 6) anchoring is good fiber muscle one end is vertically fixing, leaves standstill 20-30 hour; 7) behind the curing molding, take off sheet metal, adopt the other end of another steel pipe repeating step 1-6 anchoring fiber muscle.
Fiber muscle of the present invention test with bond-anchorage device anchoring property good (not slippage), shear failure, workable and make simple and convenient does not take place; Can prevent fully that the end sliding phenomenon from appearring in anchored end under stress; The fiber muscle can not be sheared destruction, can completely measure the deformation performance and the tensile strength of fiber muscle; The required annex of embodiment of the present invention is drawn materials easy to process, and can be used in widely in the actual engineering.
Below in conjunction with Figure of description and embodiment the present invention is described further.
Description of drawings
Fig. 1 is the structural representation of fiber muscle test of the present invention with the bond-anchorage device.
Fig. 2 is the A-A sectional view of Fig. 1.
Embodiment
The bond-anchorage device is used in fiber muscle test shown in Fig. 1-2; Steel pipe 1 adopts III level deformed bar center to become pipe and forms in the internal thread machining of inside pipe wall car 1～2.5mm pitch; Steel pipe 1 internal diameter needs the big 3～5mm of diameter of anchoring fiber muscle 3 with ribbing, and thickness of steel pipe is greater than 5mm.Steel pipe 1 inwall is through modified epoxide resin adhesive 2 and place the need anchoring fiber muscle 3 with ribbing in the steel pipe to be bonded to integral body; Tension after modified epoxide resin adhesive solidifies and compressive strength are drawn elastic modulus greater than 2500 MPas respectively greater than 40 MPas and 70 MPas.When the fiber muscle that uses when test is a fiber muscle with ribbing, steel pipe 1 length (being fiber muscle anchorage length with ribbing)>=f
t* d/79, wherein f
tBe the design tensile strength of fiber muscle with ribbing, d is the diameter of fiber muscle with ribbing.The fiber muscle that uses when test is during for fiber muscle not with ribbing, steel pipe 1 length>=f
T1* d
1/ 98, f wherein
T1Be the design tensile strength of fiber muscle not with ribbing, d
1Diameter for fiber muscle not with ribbing.
The making and the method for application of apparatus of the present invention are following:
1,, confirms the anchorage length and the diameter of steel pipe according to the type of fiber muscle.
2, according to anchorage length and diameter, select III level deformed bar, it is processed into tapped steel pipe by required diameter.
3,, and dry with acetone or alcohol wash steel pipe inwall.
4, with glue sheet metal is cemented in steel pipe one end, in case perfusion leakage during cementing agent.
5, modified epoxide resin adhesive is stirred after, along in the slow ascending pipe of steel pipe inwall.
6, will treat that anchoring fiber muscular atonia inserts in the steel pipe that has been marked with modified epoxide resin adhesive slowly, and in this process, rotate the fiber muscle towards a direction, until fiber muscle contact bottom metal thin slice, the last tackifier that overflows of removing fast.
7, make its centre that is in steel pipe with centring ring anchoring fiber muscle, guarantee that the thickness of fiber muscle periphery tackifier is even.
8, anchoring is good fiber muscle is vertically fixing, leaves standstill 20-30 hour.
9, behind the curing molding, take off sheet metal, adopt the other end of another steel pipe repeating step 3-8 anchoring fiber muscle.
Claims (5)
1. the bond-anchorage device is used in fiber muscle test, comprises the steel pipe of be with internal and external threads and is used for need anchoring fiber muscle end is bonded in the tackifier on the steel pipe inwall, and it is characterized in that: the pitch of said steel pipe internal thread is 1～2.5mm; Described tackifier is the modified epoxide resin adhesive that polyamide and epoxy resin mix by the 1:0.9-1.2 mass ratio, and tension after it solidifies and compressive strength are drawn elastic modulus greater than 2500 MPas respectively greater than 40 MPas and 70 MPas.
2. the bond-anchorage device is used in fiber muscle test according to claim 1, and it is characterized in that: the internal diameter of said steel pipe is than the big 3～5mm of external thread diameter that needs anchoring fiber muscle, and the wall thickness of steel pipe is greater than 5mm.
3. the bond-anchorage device is used in fiber muscle test according to claim 2, it is characterized in that: said steel pipe length>=f
t* d/79, wherein f
tBe the design tensile strength of fiber muscle with ribbing, d is the diameter of fiber muscle with ribbing.
4. the bond-anchorage device is used in fiber muscle test according to claim 2, it is characterized in that: said steel pipe length>=f
T1* d
1/ 98, f wherein
T1Be the design tensile strength of fiber muscle not with ribbing, d
1Diameter for fiber muscle not with ribbing.
5. each said fiber muscle test of claim 1-4 is with the method for application of bond-anchorage device, and its step is following: 1) with the inwall of acetone or alcohol wash steel pipe, and dry; 2) with glue one sheet metal is cemented in steel pipe one end; 3) modified epoxide resin adhesive is stirred after, slowly inject in the steel pipe along the steel pipe inwall; 4) will need the fiber muscular atonia of anchoring to insert slowly in the steel pipe that has been marked with modified epoxide resin adhesive, and in this process towards direction rotation fiber muscle, touch the sheet metal of bottom until the fiber muscle, remove the modified epoxide resin adhesive that overflows; 5) make its centre that is in steel pipe with centring ring anchoring fiber muscle, guarantee that the thickness of fiber muscle periphery tackifier is even; 6) anchoring is good fiber muscle one end is vertically fixing, leaves standstill 20-30 hour; 7) behind the curing molding, take off sheet metal, adopt the other end of another steel pipe repeating step 1-6 anchoring fiber muscle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110298388 CN102445385B (en) | 2011-09-28 | 2011-09-28 | Bonding and anchoring device for fiber bar testing and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110298388 CN102445385B (en) | 2011-09-28 | 2011-09-28 | Bonding and anchoring device for fiber bar testing and application method thereof |
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| CN102445385A true CN102445385A (en) | 2012-05-09 |
| CN102445385B CN102445385B (en) | 2013-09-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969116A (en) * | 2014-04-24 | 2014-08-06 | 浙江工业大学 | Fixture structure for fretting fatigue tests of hollow pips |
| CN104251797A (en) * | 2014-09-30 | 2014-12-31 | 任红 | Tensile test fixture for ribbed glass material |
| CN110779799A (en) * | 2019-11-20 | 2020-02-11 | 青岛滨海学院 | Thermal management composite material tensile test sample and preparation method thereof |
| CN112176993A (en) * | 2020-10-23 | 2021-01-05 | 洛阳理工学院 | Preparation and tensioning method of composite reinforcement |
| CN115233665A (en) * | 2022-07-20 | 2022-10-25 | 哈尔滨工业大学 | Pre-extrusion-bonding type anchoring system and method for thermoplastic resin-based FRP (fiber reinforced Plastic) rod |
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| CN2573774Y (en) * | 2002-07-19 | 2003-09-17 | 东南大学 | Resin filled extrusion fastening body device |
| US20100031607A1 (en) * | 2008-08-11 | 2010-02-11 | Oliva Michael G | Splice System for Fiber-Reinforced Polymer Rebars |
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2011
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| CN2573774Y (en) * | 2002-07-19 | 2003-09-17 | 东南大学 | Resin filled extrusion fastening body device |
| US20100031607A1 (en) * | 2008-08-11 | 2010-02-11 | Oliva Michael G | Splice System for Fiber-Reinforced Polymer Rebars |
| CN101705655A (en) * | 2009-11-26 | 2010-05-12 | 哈尔滨工业大学 | Depth crack pouring construction method of asphalt pavement longitudinal crack |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969116A (en) * | 2014-04-24 | 2014-08-06 | 浙江工业大学 | Fixture structure for fretting fatigue tests of hollow pips |
| CN104251797A (en) * | 2014-09-30 | 2014-12-31 | 任红 | Tensile test fixture for ribbed glass material |
| CN110779799A (en) * | 2019-11-20 | 2020-02-11 | 青岛滨海学院 | Thermal management composite material tensile test sample and preparation method thereof |
| CN112176993A (en) * | 2020-10-23 | 2021-01-05 | 洛阳理工学院 | Preparation and tensioning method of composite reinforcement |
| CN115233665A (en) * | 2022-07-20 | 2022-10-25 | 哈尔滨工业大学 | Pre-extrusion-bonding type anchoring system and method for thermoplastic resin-based FRP (fiber reinforced Plastic) rod |
| CN115233665B (en) * | 2022-07-20 | 2023-12-12 | 哈尔滨工业大学 | Pre-extrusion-bonding type anchoring method for thermoplastic resin-based FRP (fiber reinforced Plastic) rod |
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| CN102445385B (en) | 2013-09-04 |
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