CN203365232U - Externally-adhered FRP double-sided shear test loading device - Google Patents
Externally-adhered FRP double-sided shear test loading device Download PDFInfo
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- CN203365232U CN203365232U CN 201320455742 CN201320455742U CN203365232U CN 203365232 U CN203365232 U CN 203365232U CN 201320455742 CN201320455742 CN 201320455742 CN 201320455742 U CN201320455742 U CN 201320455742U CN 203365232 U CN203365232 U CN 203365232U
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- 238000012360 testing method Methods 0.000 title claims abstract description 78
- 239000000835 fiber Substances 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- 230000002787 reinforcement Effects 0.000 claims description 23
- 230000009977 dual effect Effects 0.000 claims description 20
- 230000000694 effects Effects 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model relates to an experimental loading device especially relates to a loading device that is used for outer two-sided shear test of pasting FRP. The utility model discloses a two-sided shear test loading device of outer FRP that pastes, comprising a base plate, fixed interval sets up the pull rod on the bottom plate, the upper end of pull rod sets up the roof, it is fixed spacing through the nut between roof and the pull rod, the bottom plate, the pull rod, be equipped with the test piece in the space that the roof is constituteed, the fibre reinforced material layer is pasted on the relative both sides of test piece, the fibre reinforced material layer is the U type, the both sides face on U type reinforced material layer is pasted in the relative both sides of test piece, the steel pipe is cup jointed to the bottom on U type reinforced material layer, the bearing passes steel pipe inner chamber, the. The utility model discloses a loading device, simple structure, it is comparatively convenient to dismantle, can guarantee the experimental load centering of double shear, and test efficiency is higher to good commonality has.
Description
Technical field
The utility model relates to a kind of experiment loading unit, relates in particular to a kind of charger for the externally bonded FRP reinforcement dual shear test.
Background technology
The high strength of fibre reinforced materials (Fiber-Reinforced Plastics, be called for short FRP), endurance, the advantage such as corrosion-resistant, lightweight, make it in Structural Engineering is reinforced, have prospect of the application widely.Along with the besides adhibit the fiber reinforcing material is applied more and more widely in field of reinforcement, with the test of research fibre reinforced materials consolidation effect and permanance, arise at the historic moment in a large number.
Fibre reinforced materials and interstructural interface performance are key factors that affects consolidation effect and permanance.When reinforcing with the fibre reinforced materials sheet material, in fibre reinforced materials, the intensity of fiber itself is very high, wanting fiber in fibre reinforced materials brings into play the characteristics that its intensity is high and just needs resin Transfer of Shear well, allow all uniform stresseds of each root fiber in fibre reinforced materials, and resin also will guarantee fibre reinforced materials sheet material and structure energy co-operation, so just can reach the effect of reinforcing.Yet find on the basis of lot of experiments, the destruction of test specimen is not often due to the breaking of fibre reinforced materials fiber, but due to the not enough stripping damage occurred of boundary strength of fibre reinforced materials and structure.So the research of fibre reinforced materials ruggedized construction interface performance has great importance.
Common interfacial bond property test method has single shear testing, dual shear test and is just drawing test.Dual shear test is because stress model simply, clearly waits characteristics to be widely adopted.Through retrieval, the load mode for dual shear test mainly contains two kinds at present: (1) arranges the built-in fitting formula; (2) the built-in fitting formula is not set.Mode (1) is delivered to power in fibre reinforced materials by the pull bar be embedded in the test specimen of two ends.The pre-buried position of pull bar and verticality have affected the reliability of dual shear test to a great extent, because the location of built-in fitting, pre-buried program are comparatively complicated, verticality is difficult to guarantee, the production efficiency that adds test specimen is low, and the less employing in experimental study of built-in fitting formula dual shear test device is set.Mode (2) roughly is divided into again two classes according to the method for attaching of FRP, and a class is to paste separately fibre reinforced materials at two opposite faces of test specimen, and another kind of is the method that adopts U-shaped stickup, and two opposite faces of U-shaped FRP stick on respectively on two sides of test specimen.The former owing to thering is the centering of being difficult to as single shear testing, the sheet material end is difficult to the shortcomings such as clamping and is not widely adopted.The latter applies, aspect medium, have certain advantage and obtain adopting comparatively widely power.
Yet the researchist disperses relatively due to correlation test, generally all adopt the self-control charger during test, thereby also do not form the test unit of a set of ideal, practicality, and have the shortcomings such as device is complicated, cost of manufacture is higher, versatility is lower.
The utility model content
Technique effect of the present utility model can overcome above-mentioned defect, and a kind of externally bonded FRP reinforcement dual shear test charger is provided, and can facilitate the test specimen location of double shear experiment and load, and particularly guarantees the centering of load.
For achieving the above object, the utility model adopts following technical scheme: it comprises base plate, on base plate, fixed intervals arrange pull bar, the upper end of pull bar arranges top board, between top board and pull bar, by nut, fix spacing, be provided with test specimen in the space that base plate, pull bar, top board form, the fibre reinforced materials layer is pasted in the both sides that test specimen is relative, the fibre reinforced materials layer is U-shaped, the two sides of U-shaped layers of reinforcement stick on the both sides that test specimen is relative, the bottom socket steel pipe of U-shaped layers of reinforcement, bearing runs through the steel pipe inner chamber, and the two ends of bearing are fixed on portal frame.
Wherein pull bar has four, and its bottom adopts welding manner to be connected with base plate, will guarantee during welding that its axis is vertical with base plate plane; The pull bar top is by the fixing top board of nut, thereby reaches the fixedly purpose of test specimen.
Distance between the external diameter of steel pipe and U-shaped fibre reinforced materials layer two sticking veneer is identical, and bearing forms arc hinge (so-called arc hinge, synthetic by the curved surfaces piece part of two different radiis, is concave surface, another is convex surface) through steel pipe.
The effect of steel pipe is: two parts that (1) makes U-shaped layers of reinforcement stick on two sides are parallel to each other, and guarantee that sticking veneer is cut; (2) the bearing pack camber of the steel pipe of large radius and minor radius hinge, guarantee axial power transmission.
The center of base plate bottom is provided with the hinge I; The center on portal frame top is provided with the hinge II, and hinge II and hinge I are along same vertical direction.
Be fixedly connected with upper connecting rod on the hinge I, hinged between upper connecting rod and hinge I.
Be fixedly connected with lower link on the hinge II, hinged between lower link and hinge II.
The hinge arranged and upper lower link reach that axle draws, the effect of load centering.The bottom of whole device is connected with testing machine with lower link with upper connecting rod respectively with top.
The two ends up and down of pull bar and top board are respectively equipped with nut I, nut II, and the nut I is positioned at the top of top board, and the nut II is positioned at the bottom of top board.
It is U-shaped that portal frame is.The top of test piece fixing device is the load bringing device, mainly comprise round steel pipe, steel bearing and U-shaped portal frame, the spacing that the external diameter of steel pipe is two sticking veneer of U-shaped fibre reinforced materials layer, steel pipe is through behind U-shaped fibre reinforced materials layer inside, and the fibre reinforced materials layer that makes to be pasted on two opposite flanks of test specimen forms the plane be parallel to each other.In steel pipe, through bearing, bearing passes the reserved hole in steelframe both sides, and fixes not meeting of bearing left and right slippage during with warranty test by tightening nuts and steelframe.
The two ends of bearing are fixedly connected with by the nut III with portal frame.
Base plate is provided with scale mark.Bearing is provided with scale mark.
For avoiding U-shaped portal frame initial tilt to occur, reach desirable test effect, the barycenter of bearing (comprising nut) must be with hinge on same perpendicular line.In addition, take barycenter as 0 scale increased to the both sides symmetry in order to facilitate steel pipe and U-shaped fibre reinforced materials layer centering, to be carved with on bearing.In addition, the upper surface of base plate is carved with the cruciform scale, and 0 place of the centre of form at plate upper surface of scale on same vertical curve, is used for determining the relative position of test specimen and test piece fixing device with the hinge I.
When making this device, can meet by the horizontal and vertical spacing of regulating four pull bars the test needs of different length and width test specimen.And can be in the situation that other parts be constant, length by adjusting yoke and the position of top board meet the test needs of differing heights test specimen, wherein the position of top board can be regulated by nut, in the certain-length scope of pull bar top, screw thread must be set, spiro rod length can need to adjust according to test.
For the device completed, the utility model also can adapt to the variation of test specimen length and width well, reaches the purpose of different tests.Simultaneously, in the situation that other parts are constant, only, by changing the external diameter of steel pipe, just can meet the test needs of different in width test specimen.Charger of the present utility model, simple structure, dismounting more for convenience, can guarantee the load centering of double shear experiment, test efficiency is higher, and has good versatility.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is side schematic view of the present utility model;
Fig. 3 is bearing schematic diagram of the present utility model;
Fig. 4 is base plate schematic diagram of the present utility model.
In figure: the 1-lower link; The 2-base plate; 3-cuts with scissors I; The 4-pull bar; The 5-top board; 6-nut I; 7-nut II; 8-fibre reinforced materials layer; The 9-steel pipe; The 10-bearing; The 11-portal frame; 12-nut III; 13-cuts with scissors II; The 14-upper connecting rod; The 15-test specimen.
Embodiment
Externally bonded FRP reinforcement dual shear test charger of the present utility model comprises base plate 2, on base plate 2, fixed intervals arrange pull bar 4, the upper end of pull bar 4 arranges top board 5, between top board 5 and pull bar 4, by nut, fix spacing, base plate 2, pull bar 4, be provided with test specimen 15 in the space that top board 5 forms, fibre reinforced materials layer 8 is pasted in the both sides that test specimen 15 is relative, fibre reinforced materials layer 8 is U-shaped, the two sides of U-shaped layers of reinforcement 8 stick on the both sides that test specimen 15 is relative, the bottom socket steel pipe 9 of U-shaped layers of reinforcement 8, bearing 10 runs through steel pipe 9 inner chambers, the two ends of bearing 10 are fixed on portal frame 11.
Wherein pull bar has four, and its bottom adopts welding manner to be connected with base plate, will guarantee during welding that its axis is vertical with base plate plane; The pull bar top is by the fixing top board of nut, thereby reaches the fixedly purpose of test specimen.
The external diameter of steel pipe 9 is identical with the distance between U-shaped fibre reinforced materials layer two sticking veneer, and bearing 10 forms arc hinge through steel pipe 9.
The center of base plate 2 bottoms is provided with hinge I 3; The center on portal frame 11 tops is provided with hinge II 13, and hinge II 13 and hinge I 3 are along same vertical direction.
Be fixedly connected with upper connecting rod 14 on hinge I 3, hinged between upper connecting rod 14 and hinge I 3.
Be fixedly connected with lower link 1 on hinge II 13, hinged between lower link 1 and hinge II 13.
The two ends of bearing 10 are fixedly connected with by nut III 12 with portal frame 11.
While adopting this device to carry out the externally bonded FRP reinforcement dual shear test, generally comprise following step:
1, integral body lower link 1, base plate 2, hinge I 3 and pull bar 4 combined is fixed by lower link 1 and testing machine bottom, existence due to hinge, device can be unstable, this just need to the discarded test block (or other object) of placement carry out temporary support below base plate, so that base plate 2 is roughly in horizontality.
2, according to testing requirements, test specimen 15 is placed on base plate 2, then load onto top board 5, and by nut I 6, nut II 7, test specimen 15 is fixed.
3, integral body portal frame 11, hinge II 13 and upper connecting rod 14 combined is fixed by upper connecting rod 14 and testing machine top.
4, first steel pipe 9 is passed to fibre reinforced materials layer 8, then bearing 10 is passed to hole, the steel pipe 9 of portal frame 11 successively, last tightening nuts III 12.
5, the height on suitable adjusting test machine top, make it meet testing requirements.Then utilize the testing machine load application.
Above several step can appropriately adjust as the case may be.
Claims (10)
1. an externally bonded FRP reinforcement dual shear test charger, it is characterized in that, comprise base plate (2), the upper fixed intervals of base plate (2) arrange pull bar (4), the upper end of pull bar (4) arranges top board (5), between top board (5) and pull bar (4), by nut, fix spacing, base plate (2), pull bar (4), be provided with test specimen (15) in the space that top board (5) forms, fibre reinforced materials layer (8) is pasted in the both sides that test specimen (15) is relative, fibre reinforced materials layer (8) is U-shaped, the two sides of U-shaped layers of reinforcement (8) stick on the relative both sides of test specimen (15), the bottom socket steel pipe (9) of U-shaped layers of reinforcement (8), bearing (10) is through steel pipe (9) inner chamber, the two ends of bearing (10) are fixed on portal frame (11).
2. externally bonded FRP reinforcement dual shear test charger according to claim 1, is characterized in that, the external diameter of steel pipe (9) is identical with the distance between U-shaped fibre reinforced materials layer two sticking veneer, and bearing (10) forms arc hinge through steel pipe (9).
3. externally bonded FRP reinforcement dual shear test charger according to claim 1, is characterized in that, the center of base plate (2) bottom is provided with hinge I (3); The center on portal frame (11) top is provided with hinge II (13), and hinge II (13) and hinge I (3) are along same vertical direction.
4. externally bonded FRP reinforcement dual shear test charger according to claim 3, is characterized in that, on hinge I (3), is fixedly connected with upper connecting rod (14), hinged between upper connecting rod (14) and hinge I (3).
5. externally bonded FRP reinforcement dual shear test charger according to claim 3, is characterized in that, on hinge II (13), is fixedly connected with lower link (1), hinged between lower link (1) and hinge II (13).
6. externally bonded FRP reinforcement dual shear test charger according to claim 3, it is characterized in that, pull bar (4) is respectively equipped with nut I (6), nut II (7) with the two ends up and down of top board (5), nut I (6) is positioned at the top of top board (5), and nut II (7) is positioned at the bottom of top board (5).
7. externally bonded FRP reinforcement dual shear test charger according to claim 3, is characterized in that, portal frame (11) is U-shaped.
8. externally bonded FRP reinforcement dual shear test charger according to claim 7, is characterized in that, the two ends of bearing (10) are fixedly connected with by nut III (12) with portal frame (11).
9. externally bonded FRP reinforcement dual shear test charger according to claim 3, is characterized in that, base plate (2) is provided with scale mark.
10. externally bonded FRP reinforcement dual shear test charger according to claim 3, is characterized in that, bearing (10) is provided with scale mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320455742 CN203365232U (en) | 2013-07-29 | 2013-07-29 | Externally-adhered FRP double-sided shear test loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320455742 CN203365232U (en) | 2013-07-29 | 2013-07-29 | Externally-adhered FRP double-sided shear test loading device |
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| Publication Number | Publication Date |
|---|---|
| CN203365232U true CN203365232U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320455742 Expired - Fee Related CN203365232U (en) | 2013-07-29 | 2013-07-29 | Externally-adhered FRP double-sided shear test loading device |
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| Country | Link |
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| CN (1) | CN203365232U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837404A (en) * | 2014-03-17 | 2014-06-04 | 河北联合大学 | Loading device for test of local stamping property of circular steel tube-restrained high-strength grouting material |
| CN104344989A (en) * | 2013-07-29 | 2015-02-11 | 青岛理工大学 | Externally-adhered FRP double-sided shear test loading device |
| CN112161922A (en) * | 2020-08-24 | 2021-01-01 | 山东大学 | Detachable device and method for testing mechanical property of FRP/concrete interface |
-
2013
- 2013-07-29 CN CN 201320455742 patent/CN203365232U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344989A (en) * | 2013-07-29 | 2015-02-11 | 青岛理工大学 | Externally-adhered FRP double-sided shear test loading device |
| CN103837404A (en) * | 2014-03-17 | 2014-06-04 | 河北联合大学 | Loading device for test of local stamping property of circular steel tube-restrained high-strength grouting material |
| CN103837404B (en) * | 2014-03-17 | 2016-02-24 | 河北联合大学 | By round steel pipe restraint and high-strength grouting material local punching performance experiment loading unit |
| CN112161922A (en) * | 2020-08-24 | 2021-01-01 | 山东大学 | Detachable device and method for testing mechanical property of FRP/concrete interface |
| CN112161922B (en) * | 2020-08-24 | 2022-04-15 | 山东大学 | Detachable device and method for testing mechanical property of FRP/concrete interface |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20160729 |
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| CF01 | Termination of patent right due to non-payment of annual fee |