CN213715026U - FRP bonding performance test device - Google Patents
FRP bonding performance test device Download PDFInfo
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- CN213715026U CN213715026U CN202022797306.8U CN202022797306U CN213715026U CN 213715026 U CN213715026 U CN 213715026U CN 202022797306 U CN202022797306 U CN 202022797306U CN 213715026 U CN213715026 U CN 213715026U
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Abstract
The utility model relates to a mechanical properties tests technical field, in particular to FRP adhesion property's test device for FRP-test piece interface adhesion property contains under research test load and the corrosive environment coupling: a bonding mechanism for bonding a test piece to an FRP plate, the bonding mechanism comprising: respectively sticking a test piece and an anchor plate of the FRP plate by using the glue layer; the holding mechanism is used for fixing the bonding mechanism, and prestress is applied to the FRP-test piece interface of the test piece by the holding mechanism; the carrying mechanism is made of corrosion-resistant stainless steel and/or the outer layer of the carrying mechanism is coated with corrosion-resistant epoxy resin. The utility model discloses simple structure, design science, reasonable, easy and simple to handle, repeatedly usable, and can overcome FRP-steel interface and carry out the eccentric stretch-draw of prestressing force in the coupling environment durability research process, the unable used repeatedly of loading device and the unable simultaneous satisfaction of same device different steel sheet thickness and glue film thickness test piece scheduling problem, have very strong application prospect.
Description
Technical Field
The utility model relates to a mechanical properties tests technical field, in particular to a test device for studying FRP-steel interface bonding performance under load and the corrosive environment coupling.
Background
Fiber Reinforced Polymer (FRP) is a composite material prepared by a pultrusion process (FRP profile) or a pultrusion winding process (FRP rib or anchor) by mixing continuous fibers and a resin matrix in a certain ratio. With the progress of science and technology and the improvement of composite material technology, the application of the FRP plate in the field of civil engineering and architecture is more and more extensive. Compared with the traditional reinforcing materials (such as steel and the like), the fiber reinforced composite material has a series of advantages of light weight, high strength, good durability, good fatigue resistance and the like, and is increasingly applied to reinforcement and reinforcement repair of various engineering structures in recent years.
Compared with the traditional steel structure reinforcing method, the technology for reinforcing the steel structure by externally pasting the FRP has obvious advantages in the aspects of material performance, mechanical property of a reinforcing surface, construction operation and the like. The FRP-steel structure system mainly comprises steel, a bonding interface and FRP, and the bonding performance of the interface becomes a key factor influencing the bearing capacity of the reinforced structure on the premise of ensuring the quality of the steel and the FRP. Regarding the durability of the FRP-steel interface, particularly the durability in a complex and severe environment, few researches are carried out, most of the existing experiments consider the influence of the FRP-steel interface in a single environment as much as possible, the coupling environment, particularly the coupling of load and environment, is the real service environment of the externally-attached FRP reinforced steel structure, and the researches are few, so that a large amount of targeted researches are urgently needed.
Disclosure of Invention
To the problem that long-term durability in present outer FRP reinforcement steel structure interface of pasting studies and meet, the utility model provides a test device of FRP-steel interface adhesion performance under research load and the corrosive environment coupling effect, easy and simple to handle, repeatedly usable solve this type of scientific research experiment and need high efficiency, volume greatly and standardized operation scheduling problem.
According to the utility model provides a design for a test device of FRP bonding property for FRP-test piece interface bonding property contains under research test load and the corrosive environment coupling: a bonding mechanism for bonding a test piece to an FRP plate, the bonding mechanism comprising: respectively sticking a test piece and an anchor plate of the FRP plate by using the glue layer; the holding mechanism is used for fixing the bonding mechanism, and prestress is applied to the FRP-test piece interface of the test piece by the holding mechanism so as to carry out mechanical property test; the carrying mechanism is made of corrosion-resistant stainless steel and/or the outer layer of the carrying mechanism is coated with corrosion-resistant epoxy resin.
As the utility model discloses FRP bonding property's test device, furtherly, the test piece is steel sheet or concrete.
As the utility model discloses FRP bonding property's test device, furtherly, anchor slab and test piece anchor and cement respectively at the both ends of FRP board.
As the utility model discloses FRP bonding property's test device, furtherly, two anchor plates about the anchor plate contains, and two upper and lower faces of FRP board tip are fixed through glue film and two anchor plates respectively, are provided with on two anchor plates to be used for with hold the bolt hole that carries the mechanism's anchor.
As the utility model discloses FRP bonding performance's test device, furtherly, the test piece passes through the glue film and fixes with FRP board hypoplastron, is provided with on the test piece to be used for with hold the bolt mounting hole that carries the mechanism to be connected.
As the testing device for the FRP bonding performance of the utility model, furthermore, the load-holding mechanism comprises a reaction frame, a jack and a thread tensioning anchor rod for force transmission, a test piece is fixed with a reaction frame bottom plate through a bolt, an anchor plate connecting piece for fixing an anchor plate is arranged in the reaction frame, one end of the thread tensioning anchor rod extends into the reaction frame and is fixed with the anchor plate connecting piece, a reaction spring and a locking nut are also arranged on the thread tensioning anchor rod between the output end of the jack and the reaction frame, and a fixing nut is arranged at the other end of the thread tensioning anchor rod; the anchor plate connecting piece is provided with a bolt hole for installing an adjusting bolt, and the position of the anchor plate on the anchor plate connecting piece is adjusted by the adjusting bolt.
As the utility model discloses FRP bonding property's test device, furtherly, still be fixed with the force sensor who is used for detecting prestressing force size on the screw thread stretch-draw stock.
As the utility model discloses FRP bonding property's test device, furtherly, screw thread stretch-draw stock central line is on same water flat line with the test piece center.
As the utility model discloses FRP bonding performance's test device, furtherly, still offer the regulation hole that is used for installing adjusting bolt one on the reaction frame bottom plate, utilize adjusting bolt one of installation on the bottom plate to adjust the position of test piece in the reaction frame.
As the utility model discloses FRP bonding performance's test device, further, the FRP board is GFRP board or CFRP board or AFRP board or BFRP board.
The utility model has the advantages that:
the utility model discloses simple structure, design science, reasonable, easy and simple to handle, repeatedly usable, and can overcome FRP-steel interface and carry out eccentric stretch-draw of prestressing force in the coupling environment durability research process, the unable used repeatedly of loading device and the unable simultaneous satisfaction of same device different steel sheet thickness and glue film thickness test piece scheduling problem, can be used to research load-test piece interface adhesive property such as FRP-steel or concrete under the corrosive environment coupling effect, have very strong application prospect.
Description of the drawings:
FIG. 1 is a schematic view of the FRP adhesion performance test apparatus in the example;
FIG. 2 is a schematic illustration of a bonding mechanism in an embodiment;
FIG. 3 is a schematic view of a holding mechanism in the embodiment;
FIG. 4 is a structural schematic of a reaction frame in an embodiment;
figure 5 is a schematic representation of the anchor plate connection member configuration of the embodiment.
In the drawing, reference numeral 1 denotes a bonding mechanism, reference numeral 11 denotes a steel plate, reference numeral 12 denotes an FRP plate, reference numeral 13 denotes an anchor plate, reference numeral 14 denotes a glue layer, reference numeral 2 denotes a holding mechanism, reference numeral 21 denotes a reaction frame, reference numeral 22 denotes an anchor plate connecting member, reference numeral 23 denotes a reaction spring, reference numeral 24 denotes a jack, reference numeral 25 denotes a force sensor, reference numeral 26 denotes a lock nut, reference numeral 27 denotes a threaded tension anchor, reference numeral 211/221 denotes an installation bolt hole, and reference numeral 212/222 denotes an adjustment bolt hole.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings and technical solutions, and embodiments of the present invention will be described in detail by way of preferred examples, but the embodiments of the present invention are not limited thereto.
The embodiment of the utility model provides an in provide a FRP bonding property test device for FRP-test piece interface bonding property contains under research test load and the corrosive environment coupling: a bonding mechanism 1 for bonding a test piece to an FRP plate 12, the bonding mechanism 1 comprising: respectively sticking a test piece of the FRP plate 12 and the anchor plate 13 by using the glue layer 14; the holding and carrying mechanism 2 is used for fixing the bonding mechanism 1, and prestress is applied to the FRP-test piece interface of the test piece by the holding and carrying mechanism 2 to carry out mechanical property test; the carrying mechanism 2 is made of corrosion-resistant stainless steel and/or coated with corrosion-resistant epoxy resin on the outer layer. Applying a load to the bonding mechanism 1 for bonding the test piece and the FRP plate 12 by using the holding mechanism 2, and determining the magnitude of the prestress; putting the device in a corrosive environment for corrosion; and taking down the bonding mechanism 1 to perform mechanical property test on a testing machine. The FRP plate 12 can be a GFRP plate, a CFRP plate, an AFRP plate, a BFRP plate and the like according to different fibers used in preparation, and can complete the research and test of the bonding property of the interface of test pieces such as FRP-steel or concrete and the like under the coupling action of load-corrosion environment.
As the utility model provides an in FRP bonding performance's test device, furtherly, the test piece is steel sheet or concrete. Referring to fig. 1, the test piece is a steel plate 11, and when the test piece is concrete, holes can be drilled in the concrete block or fixing devices can be installed on the concrete block to research the bonding performance of the FRP-concrete interface under the coupling action of load and environment. Referring to fig. 2, further, the anchor plate 13 and the test piece are respectively adhered to both ends of the FRP plate 12, which facilitates the installation test. Further, anchor plate 13 contains two anchor joint boards about, and two upper and lower faces of FRP board 12 tip are fixed with two anchor joint boards through glue film 14 respectively, are provided with the bolt hole that is used for with holding and carry 2 anchor of mechanism on two anchor joint boards, are convenient for anchor plate 13 with hold the fixed mounting who carries mechanism 2. Furthermore, the test piece is fixed with the lower plate surface of the FRP plate 12 through the glue layer 14, and the test piece is provided with a bolt mounting hole for connecting with the holding and carrying mechanism 2, so that the test pieces such as a steel plate 11 and the like can be conveniently and fixedly mounted with the holding and carrying mechanism 2.
As the testing apparatus for FRP bonding performance in the embodiment of the present invention, further, as shown in fig. 3, the load-holding mechanism 2 includes a reaction frame 21, a jack 24, and a screw tensioning anchor 27 for force transmission, the test piece is fixed to a bottom plate of the reaction frame 21 by a bolt, an anchor plate connecting member 22 for fixing the anchor plate 13 is provided in the reaction frame 21, one end of the screw tensioning anchor 27 extends into the reaction frame 21 and is fixed to the anchor plate connecting member 22, a reaction spring 23 and a locking nut 26 are further provided on the screw tensioning anchor 27 between an output end of the jack 24 and the reaction frame 21, and the other end of the screw tensioning anchor 27 is provided with a fixing nut capable of maintaining the stability of force transmission when a load is applied; the anchor plate connecting piece 22 is provided with a bolt hole for installing an adjusting bolt, and the position of the anchor plate 13 on the anchor plate connecting piece 22 is adjusted by the adjusting bolt. The equipment is convenient, the experiment of being convenient for. Referring to fig. 5, before the anchor plate 13 is attached, bolts are screwed into the adjusting bolt holes, and the anchor plate 13 is placed between the bolts on and under the anchor plate attachment member 22, in order to maintain the FRP plate 12 horizontal and centered by precisely controlling the position of the anchor plate 13 by rotating the bolts, and in addition, to adjust the bolts to accommodate test pieces of different anchor plate 13 thicknesses.
As the embodiment of the utility model provides an in FRP bonding property's test device, furtherly, still be fixed with the force sensor 25 that is used for detecting the prestressing force size on the screw thread stretch-draw stock 27, be convenient for survey load prestressing force in real time in the experiment to promote experimental convenience.
As the utility model discloses FRP bonding performance's test device in the embodiment, further, screw thread stretch-draw stock 27 central line is on same water flat line with the test piece center. The problems that prestress eccentric tensioning and a loading device cannot be repeatedly used and the same device cannot simultaneously meet test pieces with different thicknesses of steel plates 11 and adhesive layers 14 in the process of researching the durability of the coupling environment of the FRP-steel interface are solved, and the stability and the reliability of test data are improved.
As the utility model discloses FRP bonding performance's test device, further, see that fig. 4 is shown, still offer the regulation hole that is used for installing adjusting bolt one on the reaction frame bottom plate, utilize adjusting bolt one of installation on the bottom plate to adjust the position of test piece in the reaction frame. Before the bonding mechanism 1 is connected with the reaction frame 21, bolts are screwed into the adjusting bolt holes, and the steel plate 11 adhered with the FRP plate 12 is placed on the bolts, so that the position of the steel plate 11 in the reaction frame 21 can be accurately controlled by rotating the bolts, and the test piece is kept centered when prestress is applied. In addition, the bolts are adjusted to adapt to test pieces with different thicknesses of the steel plates 11 and the glue layers 14. Adjusting bolts of the reaction frame bottom plate and the anchor plate connecting piece 22 according to the thickness of the FRP-steel interface bonding mechanism 1, and keeping the reaction frame bottom plate and the anchor plate connecting piece at proper positions; placing the steel plate 11 of the FRP-steel interface bonding mechanism 1 in a reaction frame 21, slowly screwing bolts on a reaction frame bottom plate and an anchor plate connecting piece 22, and adjusting the position of the FRP-steel interface bonding mechanism 1 to ensure that the FRP plate 12 is kept horizontal and is positioned on the same horizontal line with the center of a thread tensioning anchor rod 27, so that the eccentric loading can not occur in the prestressing process; connecting the steel plate 11 and the anchor plate 13 with the reaction frame 21 and the anchor plate connecting piece 22 through mounting bolt holes; applying a certain load to the FRP-steel interface bonding mechanism 1 through the jack 24, and determining the magnitude of the prestress by observing the change of the numerical value of the force sensor 25 in the process; finally, the end lock nut 26 is tightened when the pre-stressed load is substantially unchanged. As long-term mechanical property research is carried out, a certain prestress allowance is reserved during tensioning, standing is carried out for a certain time after tensioning is finished, and whether prestress loss exists in the process is observed.
By researching the FRP-steel interface bonding performance under the coupling action of load-corrosion environment, a standardized interface bonding and holding structure is provided. By adjusting the bolts arranged on the reaction frame 21 and the anchor plate connecting piece 22, the test piece is not eccentrically loaded in the preloading process. The holding and carrying mechanism 2 is made of stainless steel or the surface of the holding and carrying mechanism is coated with anticorrosive epoxy resin, so that the testing device can be guaranteed to be applied to different corrosion environments.
Referring to fig. 1-5, the specific processes of assembly and experiment can be described as follows: the FRP-steel interface bonding mechanism 1 is prepared by bonding an FRP plate 12 to a steel plate 11 and an anchor plate 13, and the holding mechanism 2 is attached by combining the respective members. Adjusting the bolts of the reaction frame 21 and the anchor plate connecting pieces 22, placing the steel plate 11 of the FRP-steel interface bonding mechanism 1 on the bolts of the reaction frame 21, and placing the anchor plate 13 between the bolts of the anchor plate connecting pieces 22. The positions of the steel plate 11 and the anchor plate 13 are adjusted by rotating the bolts, so that the whole FRP-steel interface bonding device is positioned at a proper position of the carrying device, and the bonding interface is ensured to be centered. The steel plate 11 and the anchor plate 13 are fixed to the reaction frame bottom plate and the anchor plate connecting member 22, respectively, by bolts. The jack 24 is used for prestressing the whole device and ensures that the counter-force spring 23 can effectively compensate the stress loss. After the prestressing has been completed, the jacks 24 and the force sensors 25 are removed. The device is put into corrosive environments such as ultraviolet rays, freeze thawing and the like to carry out corrosion in severe environments. And after the corrosion is finished, taking down the FRP-steel interface bonding device, and carrying out mechanical property test on a testing machine. The thickness of the steel plate 11 and the thickness of the anchor plate 13 are determined according to test requirements, the sizes of the reaction frame 21, the anchor plate connecting piece 22 and the threaded rod are determined according to the load to be applied so as to ensure that the creep of a device component does not occur in the prestress application process and the long-term stress test process to cause stress loss, and the specific size of the reaction frame 21 formed by welding is determined according to the size of the FRP-steel interface bonding device. In order to ensure that the sticking length of the FRP-steel interface exceeds the effective sticking length, the length of the steel plate 11 for sticking the FRP is not less than 250mm, the length of the anchor plate 13 is not less than 150mm, and in order to prepare the FRP-steel interface, the length of the FRP plate 12 between the steel plate 11 and the anchor plate 13 is not less than 50 mm. Therefore, the total length of the FRP-steel interface bonding device is not less than 450 mm.
It is to be understood that the foregoing description of specific exemplary embodiments of the invention has been presented for the purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
The term "and/or" herein means that three relationships may exist. For example, a and/or B may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of this application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various modifications and changes may be made to the above specific embodiments without departing from the scope of the present invention, and various combinations of the technical features and structures of the present invention may be implemented without departing from the scope of the present invention, which is defined by the appended claims.
Claims (10)
1. The utility model provides a test device of FRP bonding property for research test load and FRP-test piece interfacial bonding property under the corrosive environment coupling effect, its characterized in that contains:
a bonding mechanism for bonding a test piece to an FRP plate, the bonding mechanism comprising: respectively sticking a test piece and an anchor plate of the FRP plate by using the glue layer;
the holding mechanism is used for fixing the bonding mechanism, and prestress is applied to the FRP-test piece interface of the test piece by the holding mechanism so as to carry out mechanical property test;
the carrying mechanism is made of corrosion-resistant stainless steel and/or the outer layer of the carrying mechanism is coated with corrosion-resistant epoxy resin.
2. The FRP bonding performance test device according to claim 1, wherein the test piece is a steel plate or concrete.
3. The FRP bonding performance test apparatus according to claim 1, wherein the anchor plate and the test piece are respectively bonded to both end portions of the FRP plate.
4. The FRP bonding performance test device according to claim 1, wherein the anchor plates comprise an upper anchor plate and a lower anchor plate, the upper plate surface and the lower plate surface of the end part of the FRP plate are respectively fixed with the two anchor plates through glue layers, and the two anchor plates are provided with bolt holes for anchoring with the holding mechanism.
5. The FRP bonding performance test device according to claim 1, wherein the test piece is fixed to the lower plate surface of the FRP plate by a glue layer, and the test piece is provided with a bolt mounting hole for connecting with the holding mechanism.
6. The FRP bonding performance test device according to claim 1, wherein the load-holding mechanism comprises a reaction frame, a jack and a threaded tension anchor rod for force transmission, the test piece is fixed with a reaction frame bottom plate through a bolt, an anchor plate connecting piece for fixing an anchor plate is arranged in the reaction frame, one end of the threaded tension anchor rod extends into the reaction frame and is fixed with the anchor plate connecting piece, a reaction spring and a locking nut are further arranged on the threaded tension anchor rod between the output end of the jack and the reaction frame, and a fixing nut is arranged at the other end of the threaded tension anchor rod; the anchor plate connecting piece is provided with a bolt hole for installing an adjusting bolt, and the position of the anchor plate on the anchor plate connecting piece is adjusted by the adjusting bolt.
7. The FRP bonding performance test device according to claim 6, wherein a force sensor for detecting the magnitude of the prestress is further fixed on the jack.
8. The FRP bonding performance test device according to claim 6, wherein the center line of the thread tension anchor rod is on the same horizontal line with the center of the test piece.
9. The FRP bonding performance test device according to claim 6, wherein the reaction frame base plate is further provided with a first adjusting hole for mounting a first adjusting bolt, and the position of the test piece in the reaction frame is adjusted by the first adjusting bolt mounted on the base plate.
10. The FRP bonding performance test device according to claim 1, wherein the FRP plate is a GFRP plate, a CFRP plate, an AFRP plate or a BFRP plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022797306.8U CN213715026U (en) | 2020-11-27 | 2020-11-27 | FRP bonding performance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022797306.8U CN213715026U (en) | 2020-11-27 | 2020-11-27 | FRP bonding performance test device |
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| Publication Number | Publication Date |
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| CN213715026U true CN213715026U (en) | 2021-07-16 |
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| CN202022797306.8U Active CN213715026U (en) | 2020-11-27 | 2020-11-27 | FRP bonding performance test device |
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| CN (1) | CN213715026U (en) |
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