CN209911199U - FRP plate/sheet corrosion test device capable of self-correcting prestress angle - Google Patents
FRP plate/sheet corrosion test device capable of self-correcting prestress angle Download PDFInfo
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- CN209911199U CN209911199U CN201821788180.4U CN201821788180U CN209911199U CN 209911199 U CN209911199 U CN 209911199U CN 201821788180 U CN201821788180 U CN 201821788180U CN 209911199 U CN209911199 U CN 209911199U
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Abstract
The utility model relates to a FRP panel/sheet corrosion test device of self-correcting prestressing force angle, including stretch-draw frame and reaction frame, stretch-draw frame both ends are provided with the stretch-draw stock, and the tip that each stretch-draw stock is located the stretch-draw frame inboard is provided with the ball pivot, and the ball pivot is connected with the clamping piece mechanism, and the clamping piece mechanism is used for centre gripping FRP panel/sheet; one of the tensioning anchor rods penetrates through the reaction frame and is connected with a jack arranged on the outer side of the reaction frame, and a reaction spring is arranged between the reaction frame and the tensioning frame. The utility model discloses whole device and test process operation are comparatively succinct, can provide the complex environment of FRP panel/sheet under load and adverse circumstances coupling effect perfectly, and whole process and device all can go on repeatedly, are convenient for carry out the corresponding experiment of big measuring tool.
Description
Technical Field
The utility model relates to a civil engineering traffic technical field specifically is a FRP panel/sheet corrosion test device from revising prestressing force angle.
Background
Fiber Reinforced Polymer (FRP) plates are formed by curing fibers and resin according to a certain proportion, with the improvement of science and technology and the improvement of composite material technology, the application of FRP plates in the field of civil engineering and architecture is more and more extensive, especially the application of FRP plates in the field of reinforcement is more and more determined due to good durability, extremely high strength and convenient reinforcement methods, and especially the FRP plates are more and more emphasized in the field of reinforcement of concrete and steel structures in recent years.
The FRP plate is more and more widely applied to civil engineering due to good durability and mechanical property, and the durability of the FRP plate, particularly the durability in a complex and severe environment is less researched due to the late appearance time of the FRP plate, most of the tests only consider the influence of the FRP plate in a single environment at present, but the coupling environment, particularly the coupling of load and environment is the real service environment of the FRP plate, and the research is less, so that a large amount of targeted research is urgently needed.
The existing FRP rib material is researched under the coupling effect of load and environment, prestress is basically applied by using a bonded sleeve anchorage device and a counterforce device, the test device is complex to operate and cannot be repeatedly used, the phenomenon of eccentric tensioning cannot occur basically in the process of prestress tensioning of the FRP rib material, the phenomenon of eccentric tensioning easily occurs in the FRP plate/sheet, and the data measured by a tensile test is obviously smaller.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to overcome the deficiencies in the prior art, the utility model provides a from FRP panel/sheet corrosion test device of revising prestressing force angle.
The technical scheme is as follows: in order to solve the technical problem, the corrosion test device for the FRP plate/sheet with the self-correcting prestress angle comprises a tension frame and a reaction frame, wherein tension anchor rods are arranged at two ends of the tension frame, spherical hinges are arranged at the end parts of the tension anchor rods, which are positioned at the inner side of the tension frame, and the spherical hinges are connected with a clamping piece mechanism which is used for clamping the FRP plate/sheet; one of the tensioning anchor rods penetrates through the reaction frame and is connected with a jack arranged on the outer side of the reaction frame, and a reaction spring is arranged between the reaction frame and the tensioning frame.
Wherein, the end part of the tension anchor rod penetrating through the reaction frame is provided with a force sensor.
One end of each spherical hinge is a threaded section for connecting a tensioning anchor rod, the other end of each spherical hinge is connected with the clamping piece through a pin bolt, and the end face of one end connected with the clamping piece is a curved surface.
Each clamping piece mechanism comprises two clamping pieces, the contact surfaces of the two clamping pieces are corrugated surfaces respectively, and the clamping pieces are fixedly connected through a fastening piece.
Wherein, the part of each clamping piece connected with the FRP plate/sheet is formed by sequentially arranging a plurality of planes and curved surfaces.
Wherein, the connecting part of each clamping piece and the FRP plate/sheet is formed by sequentially arranging four surfaces of a plane, a curved surface and a plane.
Wherein the radian of the curved surface is between-5 and 5 degrees.
The tensioning frame comprises a bottom plate, end plates are arranged at two ends of the bottom plate, supporting plates are arranged between the end plates, and each end plate is connected with a reinforcing plate.
The utility model discloses when using, including following step:
s1: clamping two ends of the FRP plate/sheet respectively through a clamping piece mechanism, and fastening by using bolts;
s2: the clamping piece mechanism is connected with the spherical hinge through a pin bolt;
s3: respectively connecting the tension anchor rod with a tension frame and a spherical hinge;
s4: one of the tension anchor rods is connected with a reaction frame, and a reaction spring is arranged between the reaction frame and the tension frame;
s5: a jack is utilized to apply prestress to the whole device, and the counterforce spring is ensured to be capable of effectively compensating stress loss;
s6: after the prestress is applied, the jack and the force sensor are removed, and a layer of anticorrosive epoxy resin is coated on all devices except the FRP plate/sheet;
s7: putting the device into a corrosive environment for a corrosion test;
s8: after the corrosion is finished, the clamping piece mechanism and the FRP plate/sheet are taken down, and the tensile property test is carried out on a testing machine;
s9: and after the test is finished, the clamping piece mechanism is disassembled, and the epoxy resin on the surface of each clamping piece is removed for repeated use to perform the next batch of tests.
Has the advantages that: the utility model discloses following beneficial effect has:
the whole device is simple, the complex environment of the FRP plate/sheet under the coupling effect of the load and the severe environment can be perfectly provided, the whole device can be repeatedly utilized, and the large-scale targeted test is convenient to carry out.
Drawings
Fig. 1 is a schematic view of a tension frame of the utility model;
FIG. 2 is a schematic view of the spherical hinge of the present invention;
FIG. 3 is a side view of the inner surface of the present invention with a corrugated clamping piece and a pin;
FIG. 4 is a detailed front view of the corrugated clamping piece on the inner surface of the utility model;
fig. 5 is a schematic view of the whole loading device of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1-5, an FRP panel/sheet corrosion test device capable of self-correcting a prestress angle includes a tension frame 4 and a reaction frame 7, wherein two ends of the tension frame 4 are provided with tension anchor rods 1, the end of each tension anchor rod 1 located at the inner side of the tension frame 4 is provided with a spherical hinge 2, the spherical hinge 2 is connected with a clip mechanism 3, and the clip mechanism 3 is used for clamping an FRP panel/sheet 5; one of the tension anchor rods 1 penetrates through the reaction frame 7 and is connected with a jack 8 arranged on the outer side of the reaction frame 7, and a plurality of reaction springs 6 are arranged between the reaction frame 7 and the tension frame 4. And a force sensor 9 is arranged at the end part of the tension anchor rod 1 which penetrates through the reaction frame 7. One end of each spherical hinge 2 is a threaded section 21, a threaded hole 211 for being in threaded connection with the tensioning anchor rod 1 is formed in the threaded section 21, a clamping piece connecting section 22 is formed at the other end of each spherical hinge 2, a pin bolt 23 is arranged on the clamping piece connecting section 22, the pin bolt 23 is connected with the clamping piece mechanism 3, and the end face of one end connected with the clamping piece mechanism 3 is a curved surface 221. Each clip mechanism 3 includes two clips 31, the contact surfaces of the two clips 31 are corrugated surfaces, and the clips 31 are fixedly connected with each other through a fastener. The connecting portion of each clip 31 and the FRP panel/sheet 5 is formed by sequentially arranging a plurality of planes and curved surfaces, and specifically, the connecting portion of each clip and the FRP panel/sheet 5 is formed by sequentially arranging four planes, i.e., a plane 311, a curved surface 312, a curved surface 313, and a plane 314. The clip 31 has a corrugated inner surface to increase the mechanical engagement force between the BFRP sheet and the clip and prevent slippage. The arc of the curved surface 312 is-5 degrees and the arc of the curved surface 313 is 5 degrees. The tension frame 4 comprises a bottom plate, end plates 41 are arranged at two ends of the bottom plate, a supporting plate 43 is arranged between the end plates 41, and each end plate 41 is connected with a reinforcing plate 42.
The utility model discloses a following step is implemented:
s1: clamping two ends of the FRP plate/sheet 5 through clamping mechanisms 3 respectively, and fastening by using bolts;
s2: the clamping piece mechanism 3 is connected with the spherical hinge 2 through a pin 23;
s3: respectively connecting a tension anchor rod 1 with a tension frame 4 and a spherical hinge 2;
s4: one of the tension anchor rods 1 is connected with a reaction frame 7, and a reaction spring 6 is arranged between the reaction frame 7 and the tension frame 4;
s5: the jack 8 is utilized to apply prestress to the whole device, and the counterforce spring 6 is ensured to be capable of effectively compensating stress loss;
s6: after the prestress is applied, the jack 8 and the force sensor 9 are removed, and a layer of anticorrosive epoxy resin is coated on all devices except the FRP plate/sheet 5;
s7: putting the device into a corrosive environment for a corrosion test;
s8: after the corrosion is finished, the clamping piece mechanism and the FRP plate/sheet 5 are taken down, and the tensile property test is carried out on a testing machine;
s9: after the test is finished, the clip mechanism 3 is detached, and the epoxy resin on the surface of each clip 31 is removed for reuse, so that the next batch of tests can be carried out.
The utility model discloses a stretch-draw frame 4, the used steel sheet size of reaction frame 7 and threaded rod size are all confirmed according to the load that will apply, in order to guarantee that prestressing force applies the process and long-term stress test in-process does not take place the device component creep, cause loss of stress, stretch-draw frame 4 is confirmed according to the experimental test piece size that experimental standard stipulated by its concrete size that forms by the welding, the effective length of the experimental used test piece of general FRP panel/sheet 5 tensile properties is relevant with test piece thickness (GBT3354-2014), stretch-draw frame 4's length is got for 480mm ~ 550 mm.
The BFRP sheet is made by hand pasting and cut into test pieces 15mm wide and 300mm long. The end parts of the BFRP sheets are clamped in the clamping piece mechanism 3, so that the BFRP sheets are basically centered and attached to the inner surfaces of the clamping pieces, the upper clamping piece 31 and the lower clamping piece 31 are screwed down by bolts, a layer of high-strength epoxy resin can be coated on the inner surfaces of the clamping pieces for ensuring the effect, and the clamping pieces 31 are ensured not to have particularly sharp edges and corners. After the test piece is manufactured, the clamping piece 31 is connected with the spherical hinge 2 through the pin 23, manual operation is needed after the test piece is manufactured, the spherical hinge 2 is rotated in the plane of the BFRP sheet material, and the spherical hinge 2 can be guaranteed to rotate flexibly. The self-balancing principle of the spherical hinge 2 during tensioning is that the spherical hinge 2 is mechanically connected with the clamping piece 31 with the corrugated inner surface through the pin 23, the connection mode enables the spherical hinge 2 to be capable of steering in the plane of the FRP plate/sheet 5, the direction of the clamping piece 31 is automatically adjusted, and eccentric tension is avoided. The spherical hinge 2 and the tensioning screw rod 1 are connected together, the end fixing nut is screwed, the tensioning screw rod 1 at the other end is led into the reaction frame 7 through the reaction plate, and the jack 8 and the force sensor 9 are connected for prestress tensioning. 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. Particularly, in order to ensure that the test result is true and reliable and the coupling condition of the severe environment and the load can be truly reflected, necessary measures should be taken to ensure the prestress of the long-term performance process.
The existing device is generally directed at FRP (fiber reinforced plastic) bars, the influence of eccentric tension can be ignored by virtue of a bonded anchorage device, the influence of eccentric tension can not be ignored by virtue of prestress exerted on the plates, the device can automatically balance and center in the loading process by virtue of the spherical hinge 2, the influence of eccentric tension can be better solved, and the device is a clip type anchorage device, is simple and convenient to operate and can be repeatedly used.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (8)
1. The utility model provides a FRP panel/sheet corrosion test device of self-correction prestressing force angle which characterized in that: the device comprises a tensioning frame and a reaction frame, wherein tensioning anchor rods are arranged at two ends of the tensioning frame, spherical hinges are arranged at the end parts of the tensioning anchor rods, which are positioned at the inner side of the tensioning frame, and clamping piece mechanisms are connected with the spherical hinges and used for clamping FRP plates/sheets; one of the tensioning anchor rods penetrates through the reaction frame and is connected with a jack arranged on the outer side of the reaction frame, and a reaction spring is arranged between the reaction frame and the tensioning frame.
2. The FRP plate/sheet corrosion test device for self-correcting prestress angle according to claim 1, wherein: and a force sensor is arranged at the end part of the tension anchor rod penetrating through the reaction frame.
3. The FRP plate/sheet corrosion test device for self-correcting prestress angle according to claim 1, wherein: one end of each spherical hinge is a threaded section for connecting a tensioning anchor rod, the other end of each spherical hinge is connected with the clamping piece through a pin bolt, and the end face of one end connected with the clamping piece is a curved surface.
4. The FRP plate/sheet corrosion test device for self-correcting prestress angle according to claim 1, wherein: each clamping piece mechanism comprises two clamping pieces, the contact surfaces of the two clamping pieces are corrugated surfaces respectively, and the clamping pieces are fixedly connected through a fastening piece.
5. The FRP plate/sheet corrosion test device for self-correcting prestress angle according to claim 4, wherein: the connecting part of each clamping piece and the FRP plate/sheet material is formed by sequentially arranging a plurality of planes and curved surfaces.
6. The FRP plate/sheet corrosion test device for self-correcting prestress angle according to claim 5, wherein: the connecting part of each clamping piece and the FRP plate/sheet material is formed by sequentially arranging four surfaces of a plane, a curved surface and a plane.
7. The FRP plate/sheet corrosion test device for self-correcting prestress angle according to claim 6, wherein: the radian of the curved surface is from-5 degrees to 5 degrees.
8. The FRP plate/sheet corrosion test device for self-correcting prestress angle according to claim 1, wherein: the tensioning frame comprises a bottom plate, end plates are arranged at two ends of the bottom plate, supporting plates are arranged between the end plates, and each end plate is connected with a reinforcing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821788180.4U CN209911199U (en) | 2018-11-01 | 2018-11-01 | FRP plate/sheet corrosion test device capable of self-correcting prestress angle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821788180.4U CN209911199U (en) | 2018-11-01 | 2018-11-01 | FRP plate/sheet corrosion test device capable of self-correcting prestress angle |
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| CN209911199U true CN209911199U (en) | 2020-01-07 |
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| CN201821788180.4U Active CN209911199U (en) | 2018-11-01 | 2018-11-01 | FRP plate/sheet corrosion test device capable of self-correcting prestress angle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444030A (en) * | 2018-11-01 | 2019-03-08 | 东南大学 | FRP plate material/sheet material the corrosion testing apparatus and method of self-correction prestressing force angle |
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2018
- 2018-11-01 CN CN201821788180.4U patent/CN209911199U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444030A (en) * | 2018-11-01 | 2019-03-08 | 东南大学 | FRP plate material/sheet material the corrosion testing apparatus and method of self-correction prestressing force angle |
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