CN214097110U - FRP and ECC reinforced concrete member interface bonding performance test device - Google Patents
FRP and ECC reinforced concrete member interface bonding performance test device Download PDFInfo
- Publication number
- CN214097110U CN214097110U CN202023082265.0U CN202023082265U CN214097110U CN 214097110 U CN214097110 U CN 214097110U CN 202023082265 U CN202023082265 U CN 202023082265U CN 214097110 U CN214097110 U CN 214097110U
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- frp
- frp sheet
- ecc
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- bottom plate
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 12
- 238000011056 performance test Methods 0.000 title claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims abstract description 6
- 239000004567 concrete Substances 0.000 claims description 39
- 230000003068 static effect Effects 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000007767 bonding agent Substances 0.000 claims 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 74
- 239000011151 fibre-reinforced plastic Substances 0.000 description 74
- 238000000034 method Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a FRP and ECC reinforced concrete member interface bonding performance test device, including the base, the base includes the bottom plate that is used for placing the component to be measured and sets up the riser at bottom plate both ends, the one end that is close to one of them riser on the bottom plate has placed the backing plate, place the FRP sheet anchor clamps that are used for the FRP sheet that stretches out on the centre gripping component to be measured on the backing plate, still place the baffle that is located between component to be measured and the backing plate on the bottom plate, be provided with the manual jack and the force transducer of mutual conflict between FRP sheet anchor clamps and the baffle, manual jack and force transducer respectively with baffle and FRP sheet anchor clamps conflict; a protective cushion layer is arranged on the inner side surface of the vertical plate close to one end of the FRP sheet clamp; the utility model has the advantages of can correct and eliminate loading eccentric moment, convenient to use, accuracy height, be convenient for the observation test phenomenon, security height are reliable.
Description
Technical Field
The utility model belongs to the technical field of building element is experimental with, concretely relates to FRP and ECC consolidates concrete member interface adhesion test device.
Background
The concrete material has certain defects such as easy cracking, brittle failure and the like, and the concrete has poor durability due to the crack working state of the reinforced concrete member. Although there are many measures to improve the performance of concrete, the problem of insufficient ductility inherent in concrete cannot be changed.
In recent years, Fiber Reinforced Polymer (FRP) has advantages of light weight, high strength, fatigue resistance, corrosion resistance, etc., and is widely used in engineering. The FRP sheet material reinforcement has the advantages of convenient construction, high economy, less wet operation and the like, and is widely applied to concrete structure reinforcement. However, the typical damage of the curved beam reinforced by the FRP sheet is that the FRP is peeled off to both sides due to the bending crack generated by the beam and the excessive interface stress near the crack, so that the middle part of the FRP is peeled off, and the utilization rate of the FRP sheet is low.
In order to improve the peeling force between the FRP and the concrete structure, a combined reinforcement method is required to improve the reinforcement efficiency of the FRP sheet, and ECC (Engineered cement based Composites, abbreviated as ECC) is applied, and the ECC is disposed between the concrete structure and the FRP sheet to provide the adhesive force between the concrete structure and the FRP sheet, so as to improve the peeling force, and the ECC has good durability and can effectively reduce the corrosion of the concrete structure by the external environment.
The bonding between the FRP sheet and the concrete is considered in the common single shear test piece interface bonding test device, and when ECC layers with different thicknesses are added between the FRP sheet and the concrete, the common test device can not be used for placing a test piece or can generate eccentric bending moment, so that a test result is influenced to a certain extent. And after the concrete member is separated from the FRP sheet, the FRP sheet clamp is easily separated from the mat to cause damage to surrounding persons or equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art not enough and providing one kind can correct and eliminate eccentric square, be convenient for observation test phenomenon, security height, be suitable for the different FRP and the ECC reinforcement concrete member interface adhesion performance test device that await measuring the component.
The technical scheme of the utility model as follows:
the FRP and ECC reinforced concrete member interface bonding performance test device comprises a base, wherein the base comprises a bottom plate for placing a member to be tested and vertical plates arranged at two ends of the bottom plate, a base plate is placed at one end, close to one of the vertical plates, of the bottom plate, an FRP sheet clamp for clamping an FRP sheet extending out of the member to be tested is placed on the base plate, a baffle plate positioned between the member to be tested and the base plate is further fixed on the bottom plate, two groups of manual jacks and force sensors which are mutually abutted are arranged between the FRP sheet clamp and the baffle plate, and the manual jacks and the force sensors are respectively abutted against the baffle plate and the FRP sheet clamp; and a protective cushion layer is arranged on the inner side surface of the vertical plate close to one end of the FRP sheet clamp.
Further, the FRP sheet clamp comprises a base, a rectangular opening is formed in the middle of the top end of the base, a plurality of pressing sheets are fixed in the rectangular opening through bolts, and the FRP sheet is pressed in the rectangular opening through the pressing sheets.
Furthermore, a plurality of grooves are linearly arranged on the side surface of the pressing sheet facing the base, and grooves which are staggered with the grooves on the pressing sheet are arranged on the bottom wall of the rectangular notch.
Furthermore, the force sensor is connected with a static stress-strain acquisition instrument through signals, and the static stress-strain acquisition instrument is connected with a computer host to display the force applied by the manual jack.
Further, the component to be tested comprises a concrete main body, a strip-shaped ECC layer is arranged on the upper side face of the concrete main body, an FRP sheet layer is bonded on the strip-shaped ECC layer through an epoxy resin binder, and one end, protruding out of the concrete main body, of the FRP sheet layer is clamped on the FRP sheet clamp.
Further, a screw rod is arranged at one end, far away from the FRP sheet clamp, of the upper side face of the bottom plate, and a pressing plate pressed on the component to be tested is installed on the screw rod through a nut.
Furthermore, rib plates 11 are arranged on two side surfaces of the baffle 5.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a backing plate of placing on the bottom plate places FRP sheet anchor clamps to can be according to the different height replacement backing plates of the component that awaits measuring, thereby realize through same FRP sheet anchor clamps, baffle, manual jack and force transducer to the component that awaits measuring of different size height carry out the adhesion property test, for the component that awaits measuring adhesion property test bring convenient and correct and eliminate the eccentric moment;
2. the utility model arranges the vertical plates at the two ends of the bottom plate, thereby avoiding the FRP sheet and the FRP sheet clamp from being separated from the cushion plate to cause damage to surrounding personnel or equipment after the FRP sheet is separated from the concrete body, and arranging the protective cushion layer at the inner side surface of the vertical plate close to the FRP sheet clamp, thereby avoiding the FRP sheet clamp from directly impacting the vertical plate to cause the damage to the FRP sheet clamp or the damage to the vertical plate;
3. the utility model adopts the manual jack to load, and can stop the operation of the manual jack at any time in the test process, thereby facilitating the state observation of the component to be tested in the test process;
in a word, the utility model has the advantages of effectively correct and eliminate loading eccentricity, convenient to use, accuracy height, be convenient for the observation test phenomenon, the security is high reliable.
Drawings
Fig. 1 is a front view of the present invention;
FIG. 2 is a schematic view of a three-dimensional structure of the middle mounting block of the present invention;
fig. 3 is a schematic cross-sectional view of the middle mounting block of the present invention.
In the figure, 1, a bottom plate, 2, a vertical plate, 3, a cushion plate, 4, an FRP sheet clamp, 401, a base, 402, a rectangular opening, 403, a pressing sheet, 5, a baffle, 6, a manual jack, 7, a force sensor, 801, a concrete body, 802, a strip-shaped ECC layer, 803, an FRP sheet layer, 9, a pressing plate, 10, a protective cushion layer, 11 and a rib plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-2, the device for testing the interfacial adhesion performance of an FRP and ECC reinforced concrete member comprises a base, the base comprises a bottom plate 1 for placing a member to be tested and vertical plates 2 arranged at two ends of the bottom plate 1, a backing plate 3 is placed at one end of the bottom plate 1 close to one of the vertical plates 2, an FRP sheet clamp 4 for clamping an FRP sheet extending from the member to be tested is placed on the backing plate 3, a baffle plate 5 positioned between the member to be tested and the backing plate 3 is fixed on the bottom plate 1, two sets of manual jacks 6 and force sensors 7 which are mutually butted are arranged between the FRP sheet clamp 4 and the baffle plate 5, the manual jacks 6 and the force sensors 7 are respectively butted against the baffle plate 5 and the FRP sheet clamp 4, so as to provide supporting force for the manual jacks 6 through the baffle plate 5, the horizontal center lines of the manual jacks 6 and the force sensors 7 are positioned on the same horizontal plane as the horizontal center line of the FRP sheet, the manual jack 6 provides horizontal thrust, so that the FRP sheet clamp 4 clamps the FRP sheet and has a rightward movement trend; and a protective cushion layer 10 is arranged on the inner side surface of the vertical plate 2 close to one end of the FRP sheet clamp 4.
As shown in fig. 3, the FRP sheet clamp 4 includes a base 401, a rectangular opening 402 is provided in a middle portion of a top end of the base 401, a plurality of pressing plates 403 are fixed in the rectangular opening 402 by bolts, and the FRP sheet is pressed in the rectangular opening 402 by the pressing plates 403; the FRP sheet is compressed by the mutual cooperation of the pressing pieces 403, and since the pressing pieces 403 are fastened to the base 401 by corresponding bolts, the FRP sheet is effectively fixed according to different compression degrees between the pressing pieces 403.
As shown in fig. 3, a plurality of grooves are linearly arranged on the side of the pressing plate 403 facing the base 401, grooves staggered with the grooves on the pressing plate 403 are formed in the bottom wall of the rectangular notch 402, and the grooves on the base 401 and the grooves on the pressing plate 403 are staggered, so that the opposite surfaces of the rectangular notch 402 and the pressing plate 403 are non-flat planes, the friction force between the FRP sheet clamp 4 and the FRP sheet is improved, and the FRP sheet is prevented from being separated from the FRP sheet clamp 4 when the manual jack works.
In this embodiment, force sensor 7 signal connection is to static stress strain collection appearance, static stress strain collection appearance is connected to the computer to show the size of the power that manual jack 6 exerted, when manual jack 6 exerted thrust to baffle 5, force sensor 7 detected the pressure that manual jack 6 exerted for baffle 5 to show through the display that links to each other with the computer host, so that personnel control the oil supply capacity of manual jack 6, thereby control the degree of change that manual jack 6 exerted power.
As shown in fig. 1, the component to be tested comprises a concrete body 801, a strip-shaped ECC layer 802 is arranged on the upper side of the concrete body 801, the strip-shaped ECC layer 802 is bonded with an FRP sheet layer 803 through an epoxy resin adhesive, and one end of the FRP sheet layer 803 protruding out of the concrete body 801 is clamped on an FRP sheet clamp 4; the concrete main body 801 is a rectangular block, the ECC layer 802 and the FRP sheet layer 803 are both smaller than the width of the concrete main body 801 and located at the center line of the upper side face of the concrete main body 801, the FRP sheet layer 803 extends out of the concrete main body 801 by a certain length, so that the FRP sheet clamp 4 can clamp the FRP sheet layer conveniently, the baffle 5 abuts against the side face of the concrete main body 801 to stop the concrete main body 801, the FRP sheet clamp 4 has the tendency of moving rightwards under the action of the manual jack 6, and the FRP sheet layer 803 can be separated from the ECC layer 802 after the thrust reaches a certain degree; on the other hand, the ECC layer 802 on the upper side of the end of the member to be tested facing the baffle 5 is at a certain distance from the end of the concrete body 801, so as to adapt to ECC layers with different widths.
As shown in fig. 1-2, a screw is disposed on the upper side of the bottom plate 1 at an end away from the FRP sheet clamp 4, a pressing plate 9 pressed on a member to be tested is mounted on the screw through a nut, and the pressing plate 9 presses on the upper side of the concrete body 801, so as to prevent the concrete block from sliding or tilting during loading.
As shown in fig. 1-2, rib plates 11 are arranged on two side surfaces of the baffle 5, and the rib plates 11 are sloping plates welded or integrally formed on the side surfaces of the baffle 5; when the novel anti-falling baffle plate is used specifically, the rib plates 11 are located on two sides of the baffle plate 5, and the baffle plate 5 and the rib plates 11 are fixed or welded on the bottom plate 1 together through bolts, so that the baffle plate 5 is prevented from falling.
In the utility model, the manual jack 6 is a separate manual jack, the output end of the manual jack is abutted against the force sensor 7, and the power of the manual jack 6 is provided by a manual pump; the bottom of the manual jack 6 is abutted against the force sensor 7, the force sensor 7 is a YBY-100KN type load sensor, the pressure sensor 7 feeds back the measured force to the static stress-strain acquisition instrument in real time, the static stress-strain acquisition instrument sends the force to a computer host for displaying, and a person adjusts the change degree of the force applied by the manual jack 6 by manually adjusting the stress application speed of a pressure rod of the manual pump according to the displayed force, so that the force applied by two sides is the same, the adhesion force between the FRP sheet layer 803 and the ECC layer 802 or the adhesion force when the residual concrete body 801 of the ECC layer 802 is separated from each other during damage can be accurately obtained, and the adhesion performance of the whole component is obtained.
When the utility model is implemented, the base, the FRP sheet clamp, the baffle and the rib plate can be made of alloy materials, and the backing plate can be made of square wood, concrete or rubber backing plate and the like; the backing plate can be reasonably selected according to the height of a concrete body in the concrete member, the baffle is of a rectangular block structure with a rectangular opening at the top, the width of the rectangular opening can accommodate different sizes of common FRP sheet test sheets, and during the test, the FRP sheet passes through the rectangular opening and is pressed on the FRP sheet clamp; the two manual jacks act on the baffle together, so that balanced force is applied to two sides of the FRP sheet clamp; in order to ensure that the central lines of the manual jack, the force sensor and the FRP sheet are positioned on the same horizontal plane, a cushion block can be placed on the base plate for placing the manual jack and the force sensor.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
- FRP and ECC reinforcement concrete member interface adhesion test device, including the base, its characterized in that: the base comprises a bottom plate (1) used for placing a component to be tested and vertical plates (2) arranged at two ends of the bottom plate (1), a base plate (3) is placed at one end, close to one of the vertical plates (2), of the bottom plate (1), an FRP sheet clamp (4) used for clamping an FRP sheet extending out of the component to be tested is placed on the base plate (3), a baffle (5) located between the component to be tested and the base plate (3) is fixed on the bottom plate (1), two groups of mutually-butted manual jacks (6) and force sensors (7) are arranged between the FRP sheet clamp (4) and the baffle (5), and the manual jacks (6) and the force sensors (7) are respectively butted against the baffle (5) and the FRP sheet clamp (4); a protective cushion layer (10) is arranged on the inner side surface of the vertical plate (2) close to one end of the FRP sheet clamp (4).
- 2. The FRP and ECC reinforced concrete member interface bonding performance test device of claim 1, wherein: the FRP sheet clamp (4) comprises a base (401), a rectangular opening (402) is formed in the middle of the top end of the base (401), a plurality of pressing sheets (403) are fixed in the rectangular opening (402) through bolts, and the FRP sheet is pressed in the rectangular opening (402) through the pressing sheets (403).
- 3. The FRP and ECC reinforced concrete member interface bonding performance test device of claim 2, wherein: a plurality of grooves are linearly arranged on the side surface of the pressing sheet (403) facing the base (401), and grooves which are staggered with the grooves on the pressing sheet (403) are arranged on the bottom wall of the rectangular notch (402).
- 4. The FRP and ECC reinforced concrete member interface bonding performance test device of claim 1, wherein: the force sensor (7) is connected with a static stress-strain acquisition instrument in a signal mode, and the static stress-strain acquisition instrument is connected with a computer host to display the force applied by the manual jack (6).
- 5. The FRP and ECC reinforced concrete member interface bonding performance test device of claim 1, wherein: the member to be tested comprises a concrete body (801), wherein a strip-shaped ECC layer (802) is arranged on the upper side surface of the concrete body (801), an FRP sheet layer (803) is bonded on the strip-shaped ECC layer (802) through an epoxy resin bonding agent, and one end, protruding out of the concrete body (801), of the FRP sheet layer (803) is clamped on the FRP sheet clamp (4).
- 6. The FRP and ECC reinforced concrete member interface bonding performance test device of claim 1, wherein: and a screw is arranged at one end, far away from the FRP sheet clamp (4), of the upper side of the bottom plate (1), and a pressing plate (9) pressed on a component to be tested is mounted on the screw through a nut.
- 7. The FRP and ECC reinforced concrete member interface bonding performance test device of claim 1, wherein: and rib plates (11) are arranged on two side surfaces of the baffle (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023082265.0U CN214097110U (en) | 2020-12-16 | 2020-12-16 | FRP and ECC reinforced concrete member interface bonding performance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023082265.0U CN214097110U (en) | 2020-12-16 | 2020-12-16 | FRP and ECC reinforced concrete member interface bonding performance test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214097110U true CN214097110U (en) | 2021-08-31 |
Family
ID=77430876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023082265.0U Expired - Fee Related CN214097110U (en) | 2020-12-16 | 2020-12-16 | FRP and ECC reinforced concrete member interface bonding performance test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214097110U (en) |
-
2020
- 2020-12-16 CN CN202023082265.0U patent/CN214097110U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210831 |