CN110763563A - Research method of FRP rib bonding slippage relation based on Poisson effect - Google Patents
Research method of FRP rib bonding slippage relation based on Poisson effect Download PDFInfo
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- 230000000694 effects Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 71
- 238000012360 testing method Methods 0.000 claims abstract description 60
- 238000004873 anchoring Methods 0.000 claims abstract description 37
- 239000000919 ceramic Substances 0.000 claims abstract description 30
- 230000002787 reinforcement Effects 0.000 claims abstract description 28
- 238000009864 tensile test Methods 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 27
- 239000010959 steel Substances 0.000 claims description 27
- 239000004568 cement Substances 0.000 claims description 24
- 239000003292 glue Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 2
- MXPBQDFWIMBACQ-ACZMJKKPSA-N Glu-Cys-Cys Chemical compound OC(=O)CC[C@H](N)C(=O)N[C@@H](CS)C(=O)N[C@@H](CS)C(O)=O MXPBQDFWIMBACQ-ACZMJKKPSA-N 0.000 claims 10
- 238000000465 moulding Methods 0.000 abstract 1
- 210000002435 tendon Anatomy 0.000 description 10
- 210000003205 muscle Anatomy 0.000 description 6
- 230000006378 damage Effects 0.000 description 4
- 230000000644 propagated effect Effects 0.000 description 3
- 239000012779 reinforcing material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/066—Special adaptations of indicating or recording means with electrical indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0298—Manufacturing or preparing specimens
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0482—Chucks, fixtures, jaws, holders or anvils comprising sensing means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0617—Electrical or magnetic indicating, recording or sensing means
- G01N2203/0623—Electrical or magnetic indicating, recording or sensing means using piezoelectric gauges
Abstract
The invention discloses a research method of FRP rib bonding slippage relation based on Poisson effect, which comprises the following steps: a. selecting and cutting FRP rib materials; b. mounting an anchoring end on the FRP rib; c. pouring and molding the ECC to obtain a bonding sliding test piece; d. sticking a piezoelectric ceramic sensor; e. pasting an intelligent aggregate sensor; f. installing a base plate, a drawing instrument, a pressure sensor and a clamping piece anchorage device; g. placing the bonding slippage test piece on a tensile testing machine; h. connecting the piezoelectric ceramic sensor and the intelligent aggregate sensor with a data acquisition card; i. starting a drawing instrument and applying prestress; j. keeping the drawing instrument applying prestress on the FRP rib material, and starting a tensile testing machine to load so as to perform a bonding slippage test; k. and establishing a bonding slip constitutive relation based on consideration of the Poisson effect and the shear hysteresis effect of the FRP reinforcement. The method can be effectively applied to the bonding and sliding test of the FRP rib material, and the test result is good in accuracy.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a research method of FRP rib bonding slippage relation based on Poisson effect.
Background
The FRP rib material has excellent mechanical properties such as light weight, high strength, high durability and the like, and has wide application in marine concrete and structures. The FRP ribs comprise fiber bundles and a matrix, and are stressed cooperatively through surface friction force and mechanical biting force and concrete or other matrixes. However, the surface of the FRP rib is easy to peel off under the action of shearing force and is weaker, so that the bonding relation between the FRP rib and concrete or other matrixes is different from that of common steel bars.
In addition, the FRP rib material has no yield in the stress deformation process, is brittle failure and has larger failure deformation amount. Therefore, the obvious Poisson effect occurs in the tension process of the reinforcing material, the FRP reinforcing material and the concrete are debonded to a certain degree, and the bonding strength is reduced; this causes the unsuitability of the specification for the bond slip test of the FRP ribs; in addition, in the bonding and sliding test process of the FRP ribs, 5 times of the anchoring length has a shear hysteresis effect, so that the accuracy of the test result is influenced, namely, the optimization must be carried out by reducing the anchoring length.
Disclosure of Invention
The invention aims to provide a research method of FRP rib bonding slippage relation based on Poisson effect aiming at the defects of the prior art, the research method of FRP rib bonding slippage relation based on Poisson effect can be effectively suitable for FRP rib bonding slippage test, and the test result is good in accuracy.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
A research method of FRP rib bonding slippage relation based on Poisson effect comprises the following steps:
a. selecting an FRP rib material and cutting the FPR rib material according to the length required by the test of a tensile testing machine;
b. mounting an anchoring end on the FRP rib;
c. and (3) pouring and forming the ECC through a template to obtain a bonding slippage test piece: the ECC is cast and molded on the periphery of the FRP rib material, and the anchoring length value between the ECC and the FRP rib material is two times of the diameter value of the FRP rib material;
d. sticking a piezoelectric ceramic sensor on the bonding sliding test piece: sticking the piezoelectric ceramic sensor on the surface of the FRP rib material of the bonding sliding test piece, wherein the piezoelectric ceramic sensor is positioned below the ECC;
e. pasting an intelligent aggregate sensor on the bonding sliding test piece: adhering an intelligent aggregate sensor to the surface of the ECC of the bonding sliding test piece, wherein the adhering position of the intelligent aggregate sensor is positioned at the height center of the ECC;
f. installing a base plate, a drawing instrument, a pressure sensor and a clamping piece anchorage device on the bonding sliding test piece: sequentially sleeving a backing plate, a drawing instrument, a pressure sensor and a clamping piece anchorage device on the periphery of the FRP rib material, wherein the backing plate, the drawing instrument, the pressure sensor and the clamping piece anchorage device are respectively positioned between the ECC and the upper end anchoring end;
g. placing the bonding slippage test piece with the base plate, the drawing instrument, the pressure sensor and the clamping piece anchorage device installed on a tensile testing machine, and clamping an upper end anchoring end and a lower end anchoring end by the tensile testing machine;
h. connecting a piezoelectric ceramic sensor to a transmitting end of a data acquisition card, connecting an intelligent aggregate sensor to a receiving end of the data acquisition card, and connecting the data acquisition card with a computer; simultaneously connecting the pressure sensor with a computer;
i. starting a drawing instrument and applying prestress to the FRP rib;
j. keeping the drawing instrument exerting prestress on the FRP tendon, simultaneously starting the tensile testing machine to load so as to perform a bonding slippage test, still selecting the same signal to excite the piezoelectric ceramic sensor acting on the FRP tendon in the process, vibrating the piezoelectric ceramic sensor and generating stress waves, wherein the stress waves are propagated in the FRP tendon, the interfaces of the FRP tendon and the ECC, and the intelligent aggregate sensor receives the stress waves and judges the damage degree of the FRP tendon and the ECC interface according to the difference of the received signal amplitude and the frequency shift at different moments;
k. and establishing a bonding slip constitutive relation based on consideration of the Poisson effect and the shear hysteresis effect of the FRP reinforcement.
In the step b, sleeving an upper end steel pipe on the periphery of the upper end part of the FRP reinforcement material, filling expansion cement between the inner wall of the upper end steel pipe and the upper end part of the FRP reinforcement material, forming an expansion cement layer after the expansion cement is solidified, and forming an upper end anchoring end of the FRP reinforcement material by the expansion cement layer on the inner side of the upper end steel pipe and the upper end steel pipe; and sleeving a lower end steel pipe on the periphery of the lower end part of the FRP reinforcement material, filling expansion cement between the inner wall of the lower end steel pipe and the lower end part of the FRP reinforcement material, forming an expansion cement layer after the expansion cement is solidified, and forming a lower end anchoring end of the FRP reinforcement material together by the expansion cement layer on the inner side of the lower end steel pipe and the lower end steel pipe.
And d, adhering the piezoelectric ceramic sensor to the surface of the FRP rib material of the bonding sliding test piece through 502 glue in the step d.
And e, the intelligent aggregate sensor is adhered to the surface of the ECC of the adhesion sliding test piece through 502 glue.
The invention has the beneficial effects that: the invention relates to a research method of FRP rib bonding slippage relation based on Poisson effect, which comprises the following steps: a. selecting an FRP rib material and cutting the FPR rib material according to the length required by the test of a tensile testing machine; b. mounting an anchoring end on the FRP rib; c. and (3) pouring and forming the ECC through a template to obtain a bonding slippage test piece: the ECC is cast and molded on the periphery of the FRP rib material, and the anchoring length value between the ECC and the FRP rib material is two times of the diameter value of the FRP rib material; d. sticking a piezoelectric ceramic sensor on the bonding sliding test piece: sticking the piezoelectric ceramic sensor on the surface of the FRP rib material of the bonding sliding test piece, wherein the piezoelectric ceramic sensor is positioned below the ECC; e. pasting an intelligent aggregate sensor on the bonding sliding test piece: adhering an intelligent aggregate sensor to the surface of the ECC of the bonding sliding test piece, wherein the adhering position of the intelligent aggregate sensor is positioned at the height center of the ECC; f. installing a base plate, a drawing instrument, a pressure sensor and a clamping piece anchorage device on the bonding sliding test piece: sequentially sleeving a backing plate, a drawing instrument, a pressure sensor and a clamping piece anchorage device on the periphery of the FRP rib material, wherein the backing plate, the drawing instrument, the pressure sensor and the clamping piece anchorage device are respectively positioned between the ECC and the upper end anchoring end; g. placing the bonding slippage test piece with the base plate, the drawing instrument, the pressure sensor and the clamping piece anchorage device installed on a tensile testing machine, and clamping an upper end anchoring end and a lower end anchoring end by the tensile testing machine; h. connecting a piezoelectric ceramic sensor to a transmitting end of a data acquisition card, connecting an intelligent aggregate sensor to a receiving end of the data acquisition card, and connecting the data acquisition card with a computer; simultaneously connecting the pressure sensor with a computer; i. starting a drawing instrument and applying prestress to the FRP rib; j. Keeping the drawing instrument exerting prestress on the FRP tendon, simultaneously starting the tensile testing machine to load so as to perform a bonding slippage test, still selecting the same signal to excite the piezoelectric ceramic sensor acting on the FRP tendon in the process, vibrating the piezoelectric ceramic sensor and generating stress waves, wherein the stress waves are propagated in the FRP tendon, the interfaces of the FRP tendon and the ECC, and the intelligent aggregate sensor receives the stress waves and judges the damage degree of the FRP tendon and the ECC interface according to the difference of the received signal amplitude and the frequency shift at different moments; k. and establishing a bonding slip constitutive relation based on consideration of the Poisson effect and the shear hysteresis effect of the FRP reinforcement. Through the design of the steps, the method can be effectively suitable for the bonding and sliding test of the FRP rib materials, and the test result is good in accuracy.
Drawings
The invention will be further described with reference to the drawings to which, however, the embodiments shown in the drawings do not constitute any limitation.
FIG. 1 is a schematic structural view of a bond-slip test piece of the present invention.
FIG. 2 is a schematic structural diagram of the bonded sliding test piece with the mounting base plate, the drawing instrument, the pressure sensor and the clamping piece anchorage.
In fig. 1, included are:
1-FRP rib 2-ECC
31-upper end steel pipe 32-lower end steel pipe
4-backing plate 5-drawing instrument
6-pressure sensor 7-clamping piece anchorage device
8-piezoelectric ceramic sensor 9-intelligent aggregate sensor.
Detailed Description
The present invention will be described below with reference to specific embodiments.
A research method of FRP rib bonding slippage relation based on Poisson effect comprises the following steps:
a. selecting an FRP rib material 1 and cutting the FPR rib material according to the length required by the test of a tensile testing machine;
b. the FRP rib material 1 is provided with an anchoring end;
c. the ECC2 was cast through a template to obtain a bond slip test piece (shown in FIG. 1): the ECC2 is cast and formed on the periphery of the FRP rib material 1, and the anchoring length value between the ECC2 and the FRP rib material 1 is twice of the diameter value of the FRP rib material 1;
d. sticking a piezoelectric ceramic sensor 8 on the bonding sliding test piece: sticking the piezoelectric ceramic sensor 8 on the surface of the FRP rib material 1 of the bonding slippage test piece, wherein the piezoelectric ceramic sensor 8 is positioned below the ECC 2;
e. paste intelligent aggregate sensor 9 on bonding slip test piece: the intelligent aggregate sensor 9 is adhered to the surface of the ECC2 of the adhesion sliding test piece, and the adhering position of the intelligent aggregate sensor 9 is located at the height center position of the ECC 2;
f. installing a base plate 4, a drawing instrument 5, a pressure sensor 6 and a clamping piece anchorage 7 on the bonding slippage test piece (as shown in figure 2): the FRP rib material 1 is sequentially sleeved with a backing plate 4, a drawing instrument 5, a pressure sensor 6 and a clamping piece anchorage device 7 at the periphery, the backing plate 4, the drawing instrument 5, the pressure sensor 6 and the clamping piece anchorage device 7 are respectively positioned between an ECC2 and an upper end anchoring end, the backing plate 4 is placed on the upper surface of an ECC2, the drawing instrument 5 is arranged on the upper surface of the backing plate 4, the pressure sensor 6 is positioned between the drawing instrument 5 and the clamping piece anchorage device 7, and the clamping piece anchorage device 7 anchors and clamps the FRP rib material 1;
g. placing the bonding slippage test piece with the base plate 4, the drawing instrument 5, the pressure sensor 6 and the clamping piece anchorage device 7 installed on a tensile testing machine, and clamping the upper end anchoring end and the lower end anchoring end by the tensile testing machine;
h. connecting a piezoelectric ceramic sensor 8 to the transmitting end of a data acquisition card, connecting an intelligent aggregate sensor 9 to the receiving end of the data acquisition card, and connecting the data acquisition card with a computer; meanwhile, the pressure sensor 6 is connected with a computer;
i. starting the drawing instrument 5 and applying prestress to the FRP reinforcement material 1, wherein the pressure sensor 6 is used for acquiring the prestress;
j. keeping the drawing instrument 5 applying prestress to the FRP reinforcement material 1, simultaneously starting a tension tester to load so as to perform a bonding slippage test, in the process, still selecting the same signal to excite the piezoelectric ceramic sensor 8 acting on the FRP reinforcement material 1, vibrating the piezoelectric ceramic sensor 8 at the moment and generating stress waves, wherein the stress waves are propagated in interfaces of the FRP reinforcement material 1, the FRP reinforcement material 1 and ECC2 and an ECC2, receiving the stress waves by the intelligent aggregate sensor 9, and judging the destruction degree of the interfaces of the FRP reinforcement material 1 and the ECC2 according to the received signal amplitude and frequency shift difference at different moments;
k. and establishing a bonding slip constitutive relation based on consideration of the Poisson effect and the shear hysteresis effect of the FRP reinforcement material 1.
It should be explained that, in the step b, the upper steel pipe 31 is sleeved on the periphery of the upper end part of the FRP reinforcement 1, the expansion cement is filled between the inner wall of the upper steel pipe 31 and the upper end part of the FRP reinforcement 1, an expansion cement layer is formed after the expansion cement is solidified, and the expansion cement layer inside the upper steel pipe 31 and the upper steel pipe 31 jointly form the upper end anchoring end of the FRP reinforcement 1; the periphery of the lower end part of the FRP reinforcement material 1 is sleeved with a lower end steel pipe 32, expansion cement is filled between the inner wall of the lower end steel pipe 32 and the lower end part of the FRP reinforcement material 1, an expansion cement layer is formed after the expansion cement is solidified, and the expansion cement layer on the inner side of the lower end steel pipe 32 and the lower end steel pipe 32 jointly form a lower end anchoring end of the FRP reinforcement material 1. The invention aims to provide an upper end anchoring end and a lower end anchoring end on an FRP rib material 1, wherein the upper end anchoring end and the lower end anchoring end are as follows: the horizontal atress of FRP muscle material 1 is fragile destruction, directly can press from both sides FRP muscle material 1 with tensile test machine anchor clamps FRP muscle material 1's upper end portion, lower tip, and can avoid directly centre gripping FRP muscle material 1 effectively through tensile test machine direct centre gripping upper end anchor end, lower extreme anchor end, just so can carry out the centre gripping protection to FRP muscle material 1 effectively to avoid FRP muscle material 1 to be pressed from both sides the bits of broken glass.
In addition, in the step d, the piezoelectric ceramic sensor 8 is adhered to the surface of the FRP rib material 1 of the adhesion sliding test piece through 502 glue; and step e, the intelligent aggregate sensor 9 is adhered to the surface of the ECC2 of the bonding slippage test piece through 502 glue.
In the step c, in the bonding and sliding test process of the FRP rib, the value of the anchoring length between the 5-time anchoring length ECC2 required by the traditional specification and the FRP rib 1 is 5 times of the diameter value of the FRP rib 1, so that a shear hysteresis effect is generated, and the accuracy of the test result is influenced; and the influence of the shear hysteresis effect can be reduced by adopting the anchoring length value between the 2-time anchoring length ECC2 and the FRP rib material 1 which is twice the diameter value of the FRP rib material 1, so that the bonding slippage result is more accurate.
According to the above conditions, the method is effectively suitable for the bonding slippage test of the FRP rib material 1 through the step design, and the test result is good in accuracy.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (4)
1. A research method for FRP rib bonding slippage relation based on Poisson effect is characterized by comprising the following steps:
a. selecting an FRP rib material (1) and cutting the FPR rib material according to the length required by the test of a tensile testing machine;
b. the FRP reinforcement (1) is provided with an anchoring end;
c. forming ECC (2) through template pouring to obtain a bonding slippage test piece: the ECC (2) is poured and formed on the periphery of the FRP rib material (1), and the anchoring length value between the ECC (2) and the FRP rib material (1) is two times of the diameter value of the FRP rib material (1);
d. sticking a piezoelectric ceramic sensor (8) on the bonding slippage test piece: sticking the piezoelectric ceramic sensor (8) to the surface of the FRP rib material (1) of the bonding sliding test piece, wherein the piezoelectric ceramic sensor (8) is positioned below the ECC (2);
e. pasting an intelligent aggregate sensor (9) on the bonding sliding test piece: the intelligent aggregate sensor (9) is adhered to the surface of the ECC (2) of the adhesion sliding test piece, and the adhering position of the intelligent aggregate sensor (9) is located at the height center position of the ECC (2);
f. installing a base plate (4), a drawing instrument (5), a pressure sensor (6) and a clamping piece anchor (7) on the bonding sliding test piece: sequentially sleeving a backing plate (4), a drawing instrument (5), a pressure sensor (6) and a clamping piece anchorage device (7) on the periphery of the FRP reinforcement material (1), wherein the backing plate (4), the drawing instrument (5), the pressure sensor (6) and the clamping piece anchorage device (7) are respectively positioned between the ECC (2) and an upper end anchoring end, the backing plate (4) is placed on the upper surface of the ECC (2), the drawing instrument (5) is arranged on the upper surface of the backing plate (4), the pressure sensor (6) is positioned between the drawing instrument (5) and the clamping piece anchorage device (7), and the anchorage device clamping piece (7) is anchored and clamped with the FRP reinforcement material (1);
g. placing a bonding sliding test piece after installing a base plate (4), a drawing instrument (5), a pressure sensor (6) and a clamping piece anchorage device (7) on a tensile testing machine, wherein the tensile testing machine clamps an upper end anchoring end and a lower end anchoring end;
h. connecting a piezoelectric ceramic sensor (8) to the transmitting end of a data acquisition card, connecting an intelligent aggregate sensor (9) to the receiving end of the data acquisition card, and connecting the data acquisition card with a computer; meanwhile, the pressure sensor (6) is connected with a computer;
i. starting the drawing instrument (5) and applying prestress to the FRP rib material (1);
j. the method comprises the steps that prestress is applied to an FRP (fiber reinforce Plastic) rib (1) by a drawing instrument (5), a tensile testing machine is started to load so as to perform a bonding slippage test, in the process, the same signal is still selected to excite a piezoelectric ceramic sensor (8) acting on the FRP rib (1), the piezoelectric ceramic sensor (8) vibrates and generates stress waves, the stress waves are transmitted in the FRP rib (1), the interfaces of the FRP rib (1) and an ECC (2) and the ECC (2), an intelligent aggregate sensor (9) receives the stress waves, and the interface failure degree of the FRP rib (1) and the ECC (2) is judged according to the received signal amplitude and frequency shift difference at different moments;
k. and establishing a bonding slip constitutive relation based on consideration of the Poisson effect and the shear hysteresis effect of the FRP rib material (1).
2. The research method of the bonding slippage relationship of the FRP ribs based on the Poisson effect as claimed in claim 1, wherein: in the step b, sleeving an upper end steel pipe (31) on the periphery of the upper end part of the FRP rib material (1), filling expansion cement between the inner wall of the upper end steel pipe (31) and the upper end part of the FRP rib material (1), forming an expansion cement layer after the expansion cement is solidified, and forming an upper end anchoring end of the FRP rib material (1) by the expansion cement layer on the inner side of the upper end steel pipe (31) and the upper end steel pipe (31); the periphery of the lower end part of the FRP reinforcement (1) is sleeved with a lower end steel pipe (32), expansion cement is filled between the inner wall of the lower end steel pipe (32) and the lower end part of the FRP reinforcement (1), an expansion cement layer is formed after the expansion cement is solidified, and the expansion cement layer on the inner side of the lower end steel pipe (32) and the lower end steel pipe (32) jointly form a lower end anchoring end of the FRP reinforcement (1).
3. The research method of the bonding slippage relationship of the FRP ribs based on the Poisson effect as claimed in claim 1, wherein: in the step d, the piezoelectric ceramic sensor (8) is adhered to the surface of the FRP rib material (1) of the adhesion sliding test piece through 502 glue.
4. The research method of the bonding slippage relationship of the FRP ribs based on the Poisson effect as claimed in claim 1, wherein: and e, the intelligent aggregate sensor (9) is adhered to the surface of the ECC (2) of the adhesion sliding test piece through 502 glue.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111965004A (en) * | 2020-06-19 | 2020-11-20 | 东南大学 | Shearing experimental device under FRP (fiber reinforced Plastic) bar tension state |
| CN114739826A (en) * | 2022-03-14 | 2022-07-12 | 水利部交通运输部国家能源局南京水利科学研究院 | Analysis method for deformation and damage of bonding surface of concrete repairing material |
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