CN107314974A - A kind of detection means and detection method - Google Patents
A kind of detection means and detection method Download PDFInfo
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- CN107314974A CN107314974A CN201710540598.7A CN201710540598A CN107314974A CN 107314974 A CN107314974 A CN 107314974A CN 201710540598 A CN201710540598 A CN 201710540598A CN 107314974 A CN107314974 A CN 107314974A
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- sheet material
- fibre reinforced
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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Abstract
The present invention relates to detection means, for detecting interface binding intensity of the first fibre reinforced composites sheet material (3) between concrete, the detection means includes：First concrete block (2)；Second concrete block (5), flat surfaces (52) intersect with the inclined surface (22), and second concrete block (5) can be closer or far from first concrete block (2)；The first end (32) of first fibre reinforced composites sheet material (3) is bonded on the inclined surface (22) of first concrete block (2), and the second end (34) are bonded on the flat surfaces (52) of second concrete block (5)；Stressed member (46) is provided with second concrete block (5)；Wherein, the bearing of trend (B) of the stressed member (46) is parallel to the flat surfaces (52)；And the longitudinal direction with the first fibre reinforced composites sheet material (3) is identical.
Description
Technical field
The present invention relates to the technical field of structural engineering, and in particular to a kind of fiber under complicated applied force pattern increases
The detection means of strong interface binding intensity of the composite (Fiber Reinforced Polymer, FRP) between concrete
And detection method.
Background technology
Fibre reinforced composites have the advantages that high intensity, endurance, corrosion-resistant, lightweight, therefore Structural Engineering
There is extensive prospect of the application in reinforcing.As outer patch fibre reinforced composites more and more widely should in structural strengthening field
With largely being arisen at the historic moment with the experiment for studying fibre reinforced materials consolidation effect and durability.
Interface performance between fibre reinforced composites and concrete structure is to influence the one of consolidation effect and durability
Individual key factor.When being reinforced using fibre reinforced composites sheet material, due to the fiber in fibre reinforced composites
The intensity of itself is very high, wants the fiber in fibre reinforced composites and plays the characteristics of its intensity is high, it is necessary to rises to bond and makees
Resin can Transfer of Shear well.The each fiber all uniform stresseds that could so allow in fibre reinforced composites,
And resin will also ensure fibre reinforced composites sheet material and structure energy cooperation, so can be only achieved the effect of reinforcing.
But found on the basis of lot of experiments, the destruction of test specimen is frequently not breaking due to fibre reinforced composites fiber,
And it is due to that boundary strength between fibre reinforced composites and concrete structure is not enough and the stripping damage that occurs.So,
The research of interface performance between fibre reinforced composites and concrete structure to be reinforced has great importance.
Current specification uses the shearing test of uniaxial direct tensile to measure fibre reinforced composites and concrete interface
Adhesive property, only shear stress on FRP and concrete interface.However, in actual reinforcing engineering, due to opening for beams of concrete
Split, diagonal crack carry out after the reason such as the changing of the relative positions, FRP and general existing shear stress, also direct stress on concrete interface.Due to
The presence of direct stress, the shear strength to interface is had than larger weakening effect.At present, FRP and Concrete Bond Strength
Method of testing mainly has uniaxial direct tensile shearing test and beam test.Beam test typically uses inverted T shaped (or rectangle) concrete
Girder, crack is preset at beam bottom, and FRP is bonded at crack, and the viscous of FRP and concrete interface is determined by four-point bending test
Knotting strength.The beam tester is typically relative complex, in the case where beam is smaller, and the general distance of four-point bending section is very short,
Requirement to four-point bending device is higher.The shearing test device of uniaxial direct tensile is relatively easy, can according to pasted FRP bars number
To be divided into single shear and two-sided cutting.Two-sided cutting is to experimental rig requirement on machining accuracy angle, and general in experiment is difficult real
Existing two shear surfaces are destroyed simultaneously.Single shear is relatively easy, is applied in engineering than wide, but to fixture and test specimen centering
Requirement it is higher.
However, above-mentioned test method does not all account for the complicated applied force state (direct stress of the component in Practical Project is built
With shear stress combined state).Adhesive surface combined failure pattern under complicated applied force (I type and the destruction of II type) can not be measured.It is complicated
Stress accumulation benefit together the adhesive property of fibre reinforced composites can be produced in influence, industry to this research compared with
It is few.Therefore, corresponding simple in construction, the experimental rig of convenient disassembly and corresponding test method are still lacked in current industry.
The content of the invention
To solve the above problems, one aspect of the present invention provides a kind of detection means, for detecting the first fiber-reinforced composite
Interface binding intensity between material sheet and concrete, the detection means includes：First concrete block, with nauropemeter
Face；Second concrete block, with flat surfaces, the flat surfaces intersect with the inclined surface, and second coagulation
Soil block can be closer or far from first concrete block；First fibre reinforced composites sheet material, first fiber reinforcement is answered
Condensation material sheet material is strip, and the first end of the first fibre reinforced composites sheet material is bonded on first coagulation
On the inclined surface of soil block, the second end of the first fibre reinforced composites sheet material is bonded on second concrete block
On flat surfaces；Stressed member is provided with second concrete block；Wherein, the bearing of trend of the stressed member is parallel to described
Flat surfaces；And the longitudinal direction of the bearing of trend of the stressed member and the first fibre reinforced composites sheet material is phase
With.
Further, the detection means also includes the second fibre reinforced composites sheet material, second fiber reinforcement
Composite material sheet is laterally pasted onto on the second end of the first fibre reinforced composites sheet material, and second fiber
Enhancing composite material sheet is laterally pasted onto on the flat surfaces.
Further, second concrete block also includes the second vertical portion, and second vertical portion protrudes from institute
Flat surfaces are stated, and cause second concrete block to be formed as L-shaped on side.
Further, the bottom of second concrete block is provided with disk roller.
Further, first concrete block also includes the first vertical portion.
Further, steel bar stress is provided with first vertical portion, and first concrete block is fixed
's.
Further, second vertical portion is provided with steel bar stress, and the stressed member is connected with the steel bar stress.
Further, the second fibre reinforced composites sheet material is strip.
Another aspect of the present invention provides a kind of detection method, wherein using detection means recited above.
Further, the detection method comprises the following steps：The first fibre reinforced composites sheet material is bonded in
On the inclined surface and the flat surfaces；The second fibre reinforced composites sheet material is laterally pasted onto described first
Second end of fibre reinforced composites sheet material and the flat surfaces) on；Apply on the stressed member along the stress
The test force of the bearing of trend of part, to detect that the interfacial adhesion between the first fibre reinforced composites sheet material and concrete is strong
Degree.
The beneficial effect of one aspect of the present invention is that there is provided adhesive surface combined failure pattern (I under one kind measurement complicated applied force
Type and the destruction of II type) fibrous composite and Bond Performance Between Concrete device.By in the first fibre reinforced composites piece
Angle is set between the first end of material and the second end, can be with the fibre reinforced composites sheet material and coagulation under complicated applied force state
Interface binding intensity between soil.
The beneficial effect of another aspect of the invention is, by the way that concret block is set into L-shaped so that test force F energy
Conduction placed in the middle, without producing moment of torsion or torque due to skew.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of the detection means of the present invention.
Fig. 2 is the close-up schematic view of the fibre reinforced composites sheet attaching of the detection means of the present invention.
Fig. 3 is the side structure schematic view of the detection means of the present invention.
Fig. 4 is the top view of the detection means of the present invention.
In institute's accompanying drawing, equivalent or similar component is represented with same reference numerals.
Embodiment
The present invention is further described with reference to specific embodiment, but does not limit the invention to these tools
Body embodiment.One skilled in the art would recognize that present invention encompasses potentially included in Claims scope
All alternatives, improvement project and equivalents.
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, should all belong to the model that the present invention is protected
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so using
Data can exchange in the appropriate case, so as to embodiments of the invention described herein.In addition, term " comprising " and " tool
Have " and their any deformation, it is intended that covering is non-exclusive to be included, for example, containing series of steps or unit
Process, method, system, product or equipment are not necessarily limited to those steps clearly listed or unit, but may include without clear
It is listing to Chu or for the intrinsic other steps of these processes, method, product or equipment or unit.
Detection means
Referring to figs. 1 to 3, overall detection means is shown, available for fiber reinforcement of the detection under complicated applied force pattern
Interface binding intensity between composite material sheet and concrete.
The detection means consists essentially of the first concrete block 2, the second concrete block 5 and the first fibre reinforced composites
Sheet material 3.
(being free of the first vertical portion 1) size of first concrete block 2 is 700*500*300mm, cuts the height on slope
For 80mm.Preferably, the slopes angle of inclined surface 22 is 0~75 degree.That is, in the level of the first concrete block 2
During placement, the angle between inclined surface 22 and horizontal plane is 0~75 degree.
(being free of the second vertical portion 4) size of second concrete block 5 is 600*500*190mm.
It is visible with reference to Fig. 1 to Fig. 4, wherein the flat table of the concrete block 5 of inclined surface 22 and second of the first concrete block 2
Face 52 is intersected, and the second concrete block 5 can be closer or far from the first concrete block 2.
It is preferred that, the first vertical portion 1 of the first concrete block 2 is set perpendicular to the 3rd flat surfaces 24, and prominent
On the 3rd flat surfaces 24；3rd flat surfaces 24 can be as between the vertical portion 1 of inclined surface 22 and first
Transition portion.However, the invention is not restricted to this, the first concrete block 2 can not include the 3rd flat surfaces 24, and first is vertical
Part 1 can be directly becoming one with inclined surface 22.Therefore, more particularly, inclined surface 22 is on the first concrete block 2
An inclined surface.
Second concrete block 2 can be generally shaped as L-shaped, wherein the second vertical portion 4 of the second concrete block 5 perpendicular to
Flat surfaces 5.Or more particularly, flat surfaces 52 are the upper surfaces of the horizontal component of the second concrete block 5.
First fibre reinforced composites sheet material 3 can be the sheet material of the strip of Longitudinal extending, and its first end 32 is engaged
On inclined surface 22, its second end 34 is bonded on flat surfaces 52.It is visible with reference to Fig. 1 to Fig. 4, the first fiber-reinforced composite
The first end 32 of material sheet 3 is substantially provided on inclined surface 22, so that the of the first fibre reinforced composites sheet material 3
One end 32 is inclined with flat surfaces 52 (the second end 34).
It is preferred that, the inclined surface 22 with flat surfaces 52 with that should intersect, the angle between inclined surface 22 and horizontal plane
For 0~75 degree, and flat surfaces 52 are set with plane-parallel.
Stressed member 46 is embedded in the second vertical portion 4 of the second concrete block 5, parallel to flat surfaces 52, and
The second end 34 that the bearing of trend of stressed member 46 passes through the first fibre reinforced composites sheet material 3.
As shown in Fig. 2 the first fibre reinforced composites sheet material 3 of strip has longitudinal direction A, as shown in figure 3, by
Power part 46 has bearing of trend B.
More particularly, the longitudinal direction A of the bearing of trend B of stressed member 46 and the first fibre reinforced composites sheet material 3
It is identical.So as to be applied to test force F on stressed member 46 can totally tansitive to the first fibre reinforced composites sheet material 3
The end 34 of first end 32 and second.
First concrete block 2 can be fixedly installed, and the bottom of the second concrete block 5 is provided with disk roller 46.In this way, the
Two concrete blocks 5 can not be by friction (or being only subjected only to the friction of very little), so as to not interfere with the precision of experiment.So by
When applying on power part 46 along the power F of its bearing of trend, power F can be acted on the first fibre reinforced composites sheet material 3 completely.
It is typically the first fiber reinforcement because the intensity of the first fibre reinforced composites sheet material 3 is very big, therefore in experiment
Bonding interface between composite material sheet 3 and inclined surface 22 or flat surfaces 52 is destroyed, and is inclined so as to measure consideration
Interface binding intensity between the fibre reinforced composites sheet material 3 and concrete of oblique effect.
Occur in order to ensure the destruction of bonding interface on the first concrete block 2, detection means may include that the second fiber increases
Strong composite material sheet 6, its similar first fibre reinforced composites sheet material 3, or strip, and laterally it is pasted on the
On second end 34 of one fibre reinforced composites sheet material 3 and flat surfaces 52, to reinforce the first fibre reinforced composites piece
Bonding between material 3 and flat surfaces 52.It should be appreciated that the second fibre reinforced composites sheet material 6 can also use it
His shape, it is only necessary to the cementation reinforced between the first fibre reinforced composites sheet material 3 and flat surfaces 52 can be played i.e.
Can.
Although the first concrete block 2 of diagram and the side of the second concrete block 5 are generally L-shaped.However, the present invention is not
It is limited to this.The purpose of the second vertical portion 4 is set to be to provide steel bar stress of the transmission from stressed member 46 for concrete block.
I.e..Stressed member 46 can be connected with the embedded bar being embedded in concrete block, so that when applying test force F, will not be due to
Offset and produce moment of torsion or torque, improve test accuracy.The purpose for setting the first vertical portion 1 is also to be so that test force F
The frame section (not shown) for fixing the first concrete block 2 can be transmitted between two parties, without produced due to skew moment of torsion or
Torque.It should be appreciated that the concrete block 5 of the first concrete block 2 second can also not influence to realize the effect above using other
Shape.
Detection method
The method detected using the detection means of the present invention is described further below.
S1:First fibre reinforced composites sheet material 3 is bonded on inclined surface 22 and flat surfaces 52；
S2:Second fibre reinforced composites sheet material 6 is laterally pasted onto the of the first fibre reinforced composites sheet material 3
On two ends 34 and flat surfaces 52；
S3：Apply the test force F along the bearing of trend B of stressed member 46 on stressed member 46 so that the first fiber reinforcement
Interfacial failure between the concrete of 3 and first concrete block of composite material sheet 2, so as to obtain the first fibre reinforced composites
Interface binding intensity between sheet material 3 and concrete.It is mixed in the first fibre reinforced composites sheet material 3 and the first concrete block 2
When coagulating the interfacial failure between soil, detection means directly measures interface binding intensity.
Wherein, test force F applying mode loads for displacement, it is proposed that loading velocity is 0.1mm/s.
It should be appreciated that the present invention describe method the step of the description that is merely exemplary, its priority is carried out
Time sequencing does not have special requirement, unless itself there is inevitable sequencing relation.
Although as it appears from the above, the present invention is illustrated with reference to limited embodiment and accompanying drawing, belonging to the present invention
Possess usual knowledge in field can carry out various modification and variation from this record per capita.Thus, other embodiment and power
Sharp claim belongs to scope of the claims with equivalent.
Claims (10)
1. a kind of detection means, for detecting interfacial adhesion of the first fibre reinforced composites sheet material (3) between concrete
Intensity, the detection means includes：
First concrete block (2), with inclined surface (22)；
Second concrete block (5), with flat surfaces (52), the flat surfaces (52) are intersected with the inclined surface (22),
And second concrete block (5) can be closer or far from first concrete block (2)；
First fibre reinforced composites sheet material (3), the first fibre reinforced composites sheet material (3) is strip, and
The first end (32) of the first fibre reinforced composites sheet material (3) is bonded on the nauropemeter of first concrete block (2)
On face (22), the second end (34) of the first fibre reinforced composites sheet material (3) is bonded on second concrete block (5)
Flat surfaces (52) on；
Stressed member (46) is provided with second concrete block (5)；
Characterized in that, the bearing of trend (B) of the stressed member (46) is parallel to the flat surfaces (52)；And
The bearing of trend (B) of the stressed member (46) and the longitudinal direction of the first fibre reinforced composites sheet material (3) are
Identical.
2. detection means according to claim 1, it is characterised in that the detection means also includes the second fiber reinforcement and answered
Condensation material sheet material (6), the second fibre reinforced composites sheet material (6) is laterally pasted onto the first fiber-reinforced composite material
On the second end (34) of media sheet (3), and the second fibre reinforced composites sheet material (6) laterally be pasted onto it is described flat
On surface (52).
3. detection means according to claim 1, it is characterised in that second concrete block (5) also includes second and erected
Straight part (4), second vertical portion (4) protrudes from the flat surfaces (52), and causes second concrete block (5)
Be formed as L-shaped on side.
4. detection means according to claim 1, it is characterised in that the bottom of second concrete block (5) is provided with
Disk roller (42).
5. detection means according to claim 1, it is characterised in that first concrete block (2) also includes first and erected
Straight part (1).
6. detection means according to claim 5, it is characterised in that be provided with stress in first vertical portion (1)
Reinforcing bar, and first concrete block (2) is fixed.
7. detection means according to claim 3, it is characterised in that second vertical portion (4) is provided with stress steel
Muscle, the stressed member (46) is connected with the steel bar stress.
8. detection means according to claim 2, it is characterised in that the second fibre reinforced composites sheet material (6)
It is strip.
9. a kind of detection method, it is characterised in that use detection means according to any one of claim 1 to 8.
10. detection method according to claim 9, it is characterised in that comprise the following steps：
The first fibre reinforced composites sheet material (3) is bonded in the inclined surface (22) and the flat surfaces (52)
On；
Second fibre reinforced composites sheet material (6) is laterally pasted onto the first fibre reinforced composites sheet material (3)
On second end (34) and the flat surfaces (52)；
Apply the test force (F) along the bearing of trend (B) of the stressed member (46) on the stressed member (46), to detect
Interface binding intensity of the one fibre reinforced composites sheet material (3) between concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710540598.7A CN107314974A (en) | 2017-07-05 | 2017-07-05 | A kind of detection means and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710540598.7A CN107314974A (en) | 2017-07-05 | 2017-07-05 | A kind of detection means and detection method |
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| Publication Number | Publication Date |
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| CN107314974A true CN107314974A (en) | 2017-11-03 |
Family
ID=60180507
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710540598.7A Pending CN107314974A (en) | 2017-07-05 | 2017-07-05 | A kind of detection means and detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111257221A (en) * | 2020-03-10 | 2020-06-09 | 南京交通职业技术学院 | Device and method for testing bonding performance of fiber reinforced composite material reinforced concrete |
| CN112161924A (en) * | 2020-09-30 | 2021-01-01 | 福建工程学院 | Testing device and method for tensile-shear bonding performance of basalt fiber board and concrete interface |
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| JPH1037114A (en) * | 1996-07-26 | 1998-02-10 | Aica Kogyo Co Ltd | Joint treatment method |
| CN101806714A (en) * | 2010-04-20 | 2010-08-18 | 东南大学 | Beam tester of bonding strength of fibre reinforced composite sheet and concrete |
| CN103344560A (en) * | 2013-07-19 | 2013-10-09 | 郑州大学 | Method for testing interface bond behavior of CFRP (carbon fiber reinforced polymer) cloth-concrete based on beam specimen |
| CN103776766A (en) * | 2014-01-24 | 2014-05-07 | 河海大学 | Method for testing surface adhesive property of basalt fibre cloth and concrete |
| CN106567555A (en) * | 2016-10-31 | 2017-04-19 | 同济大学 | Method for improving direct shear bearing capacity of reinforced concrete component by obliquely attaching fiber composite material to surface of reinforced concrete component |
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2017
- 2017-07-05 CN CN201710540598.7A patent/CN107314974A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1037114A (en) * | 1996-07-26 | 1998-02-10 | Aica Kogyo Co Ltd | Joint treatment method |
| CN101806714A (en) * | 2010-04-20 | 2010-08-18 | 东南大学 | Beam tester of bonding strength of fibre reinforced composite sheet and concrete |
| CN103344560A (en) * | 2013-07-19 | 2013-10-09 | 郑州大学 | Method for testing interface bond behavior of CFRP (carbon fiber reinforced polymer) cloth-concrete based on beam specimen |
| CN103776766A (en) * | 2014-01-24 | 2014-05-07 | 河海大学 | Method for testing surface adhesive property of basalt fibre cloth and concrete |
| CN106567555A (en) * | 2016-10-31 | 2017-04-19 | 同济大学 | Method for improving direct shear bearing capacity of reinforced concrete component by obliquely attaching fiber composite material to surface of reinforced concrete component |
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| 姚谏 等: "FRP 复合材料与混凝土的粘结强度试验研究", 《建筑结构学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111257221A (en) * | 2020-03-10 | 2020-06-09 | 南京交通职业技术学院 | Device and method for testing bonding performance of fiber reinforced composite material reinforced concrete |
| CN112161924A (en) * | 2020-09-30 | 2021-01-01 | 福建工程学院 | Testing device and method for tensile-shear bonding performance of basalt fiber board and concrete interface |
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