CN212207051U - Device for measuring interface performance of fiber cloth and concrete by double-sided shearing - Google Patents
Device for measuring interface performance of fiber cloth and concrete by double-sided shearing Download PDFInfo
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- CN212207051U CN212207051U CN202020874130.9U CN202020874130U CN212207051U CN 212207051 U CN212207051 U CN 212207051U CN 202020874130 U CN202020874130 U CN 202020874130U CN 212207051 U CN212207051 U CN 212207051U
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- concrete block
- fiber cloth
- concrete
- steel plate
- base
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- 239000000835 fiber Substances 0.000 title claims abstract description 55
- 239000004744 fabric Substances 0.000 title claims abstract description 54
- 238000010008 shearing Methods 0.000 title description 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 75
- 239000010959 steel Substances 0.000 claims abstract description 75
- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 239000003292 glue Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 239000011208 reinforced composite material Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 5
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 4
- 239000011151 fibre-reinforced plastic Substances 0.000 description 4
- 230000002146 bilateral effect Effects 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Device of two-sided shear survey fibre cloth and concrete interface performance includes: the concrete block comprises an upper concrete block, a lower concrete block, a base, fiber cloth, a jack, a displacement meter and a steel frame; the upper concrete block and the lower concrete block are arranged oppositely up and down, the lower concrete block is fixed on the base, and the top surface of the lower concrete block is fixed with a lower steel plate; the fiber cloth comprises two pieces which are symmetrical left and right, the fiber cloth on the left side is tightly attached to the left side surface of the upper concrete block and the left side surface of the lower concrete block, and the fiber cloth on the right side is tightly attached to the right side surface of the upper concrete block and the right side surface of the lower concrete block; the base of the jack is welded on the lower steel plate, the force application end is welded with the upper steel plate, and the upward concrete block applies force vertically; the displacement meter is arranged between the upper concrete block and the lower steel plate; the steel frame covers the upper concrete block and the lower concrete block. The utility model has simple structure, easy installation and no need of using a complex testing machine; the fiber cloth is stressed on a straight line, the stress is uniform, and the accuracy of the measurement result is higher.
Description
Technical Field
The utility model belongs to concrete capability test field, concretely relates to device of two-sided shearing survey fibre cloth and concrete interface performance.
Background
Concrete, concrete for short, is a generic term for engineering composite materials in which aggregates are cemented into a whole by cementitious materials. The concrete is cement concrete prepared with cement as cementing material, sand and stone as aggregate and water (including additive and admixture) in certain proportion and through mixing and stirring. At present, the concrete is a structural form which is most applied at home, and accounts for the vast majority of the total number, and meanwhile, China is also the region which is most applied with the concrete structure in the world. With the increase of the service time, the concrete is inevitably aged and damaged, thereby affecting the mechanical property of the concrete and reducing the safety of the building structure formed by the concrete.
Fiber Reinforced Polymer (FRP) is a composite material formed by winding, molding or pultrusion a reinforcing Fiber material and a matrix material. Because FRP has the characteristics of high specific strength, large specific modulus, strong designability, good corrosion resistance and durability and thermal expansion coefficient similar to that of concrete, the FRP material is widely applied to the reinforcement of concrete structures and can effectively slow down the aging and damage of concrete materials.
In concrete structures reinforced by fiber cloth, the concrete structures are generally not damaged due to the breakage of concrete or the fracture of the fiber cloth, but the interface between the concrete and the fiber cloth is usually stripped, and the stripping is caused because the fiber cloth is adhered to the concrete through building glue, so that the position of a glue layer is easy to damage in the actual use process. Therefore, it is necessary to design a specific test device to study the relationship between the force loading and the fiber cloth peeling. However, the conventional measuring device has a complicated structure, requires a large-sized testing machine for drawing, is unstable in the center, and causes uneven stress on the fiber cloth, which often results in low accuracy of the measurement result.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to not enough among the prior art, provide a device of survey fibre cloth and concrete interface performance is cuted to two sides.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
device of two-sided shear survey fibre cloth and concrete interface performance, its characterized in that includes: the concrete block comprises an upper concrete block, a lower concrete block, a base, fiber cloth, a jack, a displacement meter and a steel frame; the upper concrete block and the lower concrete block are arranged oppositely up and down and have the same cuboid structure, the lower concrete block is fixed on a base, the base is fixed on the ground through foundation bolts, and a lower steel plate is fixed on the top surface of the lower concrete block; the fiber cloth comprises two pieces which are bilaterally symmetrical, the left fiber cloth is tightly attached to the left side surface of the upper concrete block and the left side surface of the lower concrete block, and the right fiber cloth is tightly attached to the right side surface of the upper concrete block and the right side surface of the lower concrete block; the base of the jack is welded on the lower steel plate, the force application end of the jack is welded with the upper steel plate, and the force application end vertically applies force to the upward concrete block through the upper steel plate; the displacement meters are arranged between the upper concrete block and the lower steel plate, and the four displacement meters are uniformly distributed around the jack; the steelframe covers outside last concrete piece and lower concrete piece, and the steelframe is including two first perpendicular steel sheets of fixing on the base around, first perpendicular steel sheet is hugging closely last concrete piece and is setting up with lower concrete piece, and the top surface of last concrete piece is not less than to the height of first perpendicular steel sheet, and the welding has two perpendicular steel sheets of second between the first perpendicular steel sheet, the setting of last concrete piece is hugged closely to the perpendicular steel sheet of second, and two perpendicular steel sheets of first perpendicular steel sheet and two perpendicular steel sheets of second hold the cuboid space of concrete piece around forming jointly.
In order to optimize the technical scheme, the specific measures adopted further comprise:
further, the base is made by the steel sheet, and the welding has perpendicular embedded bar between base and the lower steel sheet, embedded bar is pre-buried in the center of concrete block down.
Furthermore, the fiber cloth is made of carbon fiber reinforced composite materials and is adhered to the side faces of the upper concrete block and the lower concrete block through building glue.
Further, the length of each piece of fiber cloth stuck on the lower concrete block is not less than 200 mm.
Further, the inner surface of the steel frame is coated with a lubricating layer.
Furthermore, the centers of the upper concrete block, the upper steel plate, the jack, the lower steel plate and the lower concrete block are all located on the same vertical line, and the two pieces of fiber cloth are arranged in bilateral symmetry through the connection line of the centers.
The utility model has the advantages that: the device has simple structure and easy installation, and can measure the stripping bearing capacity in the vertical direction without using a complex testing machine; the fiber cloth is symmetrically stuck on the two sides, the stress of the fiber cloth is on a straight line, the stress is uniform, and the accuracy of the measurement result is higher; the use of steelframe and lubricant layer for the center is more stable, effectively reduces experimental error.
Drawings
FIG. 1 is a perspective view of an apparatus for measuring the interface performance between a fiber cloth and concrete by double-sided shearing.
Fig. 2 is a perspective view of the device before the steel frame is installed.
Fig. 3 is a front view of the device before the steel frame is installed.
The reference numbers are as follows: 1. putting concrete blocks; 2. a lower concrete block; 3. a base; 4. fiber cloth; 5. a jack; 6. a displacement meter; 7. a steel frame; 8. anchor bolts; 9. a lower steel plate; 10. steel plate feeding; 11. a first vertical steel plate; 12. a second vertical steel plate; 13. and (6) embedding reinforcing steel bars.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The device for measuring the interface performance of the fiber cloth and the concrete by double-sided shearing as shown in fig. 1 and fig. 2 is characterized by comprising: the concrete block comprises an upper concrete block 1, a lower concrete block 2, a base 3, fiber cloth 4, a jack 5, a displacement meter 6 and a steel frame 7. Go up concrete block 1 and lower concrete block 2 relative setting from top to bottom, both have the same cuboid structure, and lower concrete block 2 is fixed on base 3, and base 3 is made by the rectangle steel sheet, fixes subaerial through rag bolt 8 on four angles, and lower concrete block 2's top surface is fixed with down steel sheet 9, is used for fixed jack 5 on the one hand, and on the other hand is used for cooperating fixed lower concrete block 2 with base 3. Referring to fig. 3, vertical embedded steel bars 13 are welded between the base 3 and the lower steel plate 9, and the embedded steel bars 13 are embedded in the center of the lower concrete block 2, so that the lower concrete block 2 can be stably fixed on the ground.
The fiber cloth 4 is made of carbon fiber reinforced composite materials and is adhered to the side surfaces of the upper concrete block 1 and the lower concrete block 2 through building glue. The fiber cloth 4 comprises two pieces which are bilaterally symmetrical, the left fiber cloth 4 on the left side is tightly attached to the left side surface of the upper concrete block 1 and the left side surface of the lower concrete block 2, the right fiber cloth 4 on the right side is tightly attached to the right side surface of the upper concrete block 1 and the right side surface of the lower concrete block 2, and the length of each piece of fiber cloth 4 which is adhered to the lower concrete block 2 is not less than 200 mm. As can be seen from fig. 3, the fiber cloth 4 is tightly attached to the side surfaces of the two pieces of concrete in a left-right symmetric manner, and the fiber cloth 4 is stressed on one line in a bilateral symmetric manner, so that the pure shearing force can be measured.
The base of the jack 5 is welded on the lower steel plate 9, the force application end of the jack 5 is welded with the upper steel plate 10, and the force application end applies force to the upper concrete block 1 vertically through the upper steel plate 10. The displacement gauge 6 is installed between the upper concrete block 1 and the lower steel plate 9 for observing the change of the interface between the fiber cloth 4 and the concrete. Four displacement meters 6 surround jack 5 evenly distributed, can effectively improve the accuracy of measurement.
Because this device is the vertical direction application of force, and upper concrete block 1 itself has certain weight, in order to strengthen the stability of structure, prevents that the center is unstable, has designed steelframe 7 cover outside upper concrete block 1 and lower concrete block 2 for retrain the orbit that moves of upper concrete block 1. As shown in fig. 1, the steel frame 7 includes two front and rear first vertical steel plates 11 fixed on the base 3, the first vertical steel plates 11 are disposed closely to the upper concrete block 1 and the lower concrete block 2, the height of the first vertical steel plates 11 is not lower than the top surface of the upper concrete block 1, which is equivalent to the two first vertical steel plates 11 clamping the two concrete blocks in the middle and constraining the two concrete blocks in the front and rear directions. Two perpendicular steel sheets 12 of second have been welded between the first perpendicular steel sheet 11, and the setting of concrete piece 1 is hugged closely to perpendicular steel sheet 12 of second, and two perpendicular steel sheets 12 of second are equivalent to only will go up concrete piece 1 and press from both sides in the centre, retrain upper concrete piece 1 in the left and right direction. In order to reduce the friction between the steel frame 7 and the concrete mass, the inner surface of the steel frame 7 is coated with a lubricating layer.
During the test, the device is assembled according to the figure, the centers of the upper concrete block 1, the upper steel plate 10, the jack 5, the lower steel plate 9 and the lower concrete block 2 are all positioned on the same vertical line, and the two pieces of fiber cloth 4 are arranged in bilateral symmetry by connecting the centers. And starting the jack 5, jacking the upper concrete block 1 by the jack 5 upwards, and observing the damage condition of the interface between the fiber cloth 4 and the concrete. Due to the arrangement of the double-sided fiber cloth, the final measured peel load capacity was divided by 2.
It should be noted that, in the present invention, the terms "upper", "lower", "left", "right", "front", "back", etc. are used for the sake of clarity only, and are not used to limit the scope of the present invention, and the relative relationship changes or adjustments may be made without substantial technical changes.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, a plurality of modifications and decorations without departing from the principle of the present invention should be considered as the protection scope of the present invention.
Claims (6)
1. Device of two-sided shear survey fibre cloth and concrete interface performance, its characterized in that includes: the concrete block comprises an upper concrete block (1), a lower concrete block (2), a base (3), fiber cloth (4), a jack (5), a displacement meter (6) and a steel frame (7); the upper concrete block (1) and the lower concrete block (2) are arranged oppositely up and down and have the same cuboid structure, the lower concrete block (2) is fixed on a base (3), the base (3) is fixed on the ground through foundation bolts (8), and a lower steel plate (9) is fixed on the top surface of the lower concrete block (2); the fiber cloth (4) comprises two bilaterally symmetrical fiber cloths, the left fiber cloth (4) is tightly attached to the left side surface of the upper concrete block (1) and the left side surface of the lower concrete block (2), and the right fiber cloth (4) is tightly attached to the right side surface of the upper concrete block (1) and the right side surface of the lower concrete block (2); the base of the jack (5) is welded on the lower steel plate (9), the force application end of the jack (5) is welded with the upper steel plate (10), and the force application end vertically applies force to the upward concrete block (1) through the upper steel plate (10); the displacement meters (6) are arranged between the upper concrete block (1) and the lower steel plate (9), and the four displacement meters (6) are uniformly distributed around the jack (5); outside steelframe (7) cover at last concrete block (1) and lower concrete block (2), steelframe (7) are including two first perpendicular steel sheets (11) of fixing on base (3) around, first perpendicular steel sheet (11) are hugged closely last concrete block (1) and are set up with lower concrete block (2), and the top surface of last concrete block (1) is not less than highly being not less than of first perpendicular steel sheet (11), and the welding has two perpendicular steel sheets of second (12) between first perpendicular steel sheet (11), the setting of last concrete block (1) is hugged closely in perpendicular steel sheet of second (12), and two first perpendicular steel sheets (11) and two perpendicular steel sheets of second (12) are jointly around forming the cuboid space that holds last concrete block (1).
2. The apparatus for double-sided shear measurement of interface properties of fiber cloth and concrete according to claim 1, wherein: the base (3) is made by the steel sheet, and the welding has vertically embedded bar (13) between base (3) and lower steel sheet (9), embedded bar (13) is pre-buried at the central authorities of concrete block (2) down.
3. The apparatus for double-sided shear measurement of interface properties of fiber cloth and concrete according to claim 1, wherein: the fiber cloth (4) is made of carbon fiber reinforced composite materials and is adhered to the side faces of the upper concrete block (1) and the lower concrete block (2) through building glue.
4. The apparatus for double-sided shear measurement of interface properties of fiber cloth and concrete according to claim 3, wherein: the length of each piece of fiber cloth (4) stuck on the lower concrete block (2) is not less than 200 mm.
5. The apparatus for double-sided shear measurement of interface properties of fiber cloth and concrete according to claim 1, wherein: the inner surface of the steel frame (7) is coated with a lubricating layer.
6. The apparatus for double-sided shear measurement of interface properties of fiber cloth and concrete according to claim 1, wherein: the centers of the upper concrete block (1), the upper steel plate (10), the jack (5), the lower steel plate (9) and the lower concrete block (2) are all positioned on the same vertical line, and the two pieces of fiber cloth (4) are arranged in a left-right symmetrical mode according to the connecting line of the centers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020874130.9U CN212207051U (en) | 2020-05-22 | 2020-05-22 | Device for measuring interface performance of fiber cloth and concrete by double-sided shearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020874130.9U CN212207051U (en) | 2020-05-22 | 2020-05-22 | Device for measuring interface performance of fiber cloth and concrete by double-sided shearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212207051U true CN212207051U (en) | 2020-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020874130.9U Expired - Fee Related CN212207051U (en) | 2020-05-22 | 2020-05-22 | Device for measuring interface performance of fiber cloth and concrete by double-sided shearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212207051U (en) |
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2020
- 2020-05-22 CN CN202020874130.9U patent/CN212207051U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201222 |
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| CF01 | Termination of patent right due to non-payment of annual fee |