JP2879376B2 - FRP tendon anchoring structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchoring structure for a tendon made of fiber reinforced synthetic resin (hereinafter referred to as FRP) used as a tendon for prestressed concrete, particularly a substitute for a reinforcing steel bar for concrete reinforcement.

[0002]

2. Description of the Related Art In recent years, in order to solve the problems of corrosion and magnetism of steel bars used for prestressed concrete tendons and concrete reinforcing bars, FRP tendons have been increasingly used. Since the surface of the tendon material has low friction, various fixing methods have been developed to secure the fixing property of the fixing end portion.

[0003] As a conventional fixing method of a FRP tendon material, a wedge fixing method for fixing by inserting a plurality of wedges into a taper gap around the FRP tendon material inserted into a sleeve having a tapered surface on the inner surface (Japanese Patent Laid-Open Publication No. H10-163873). 63-26
No.8862) and a wedge-shaped FR in which a notch is formed at the fixing end portion in a sleeve having rough irregularities on the inner surface.
A wedge grout fixing system (Japanese Utility Model Laid-Open No. 1-96926) is known in which a P-tension material is inserted and filled with low-shrinkage grout to consolidate and integrate it. The frictional force between the smooth peripheral surface and the inner surface of the wedge against the tensile force has a disadvantage that sufficient fixing strength cannot be obtained, and the frictional force is increased by providing irregularities around the tendon material. In this case, there is a problem in uniform fixing along the line circumferential surface, there is a problem that the fixing efficiency is very low, and in the latter, since the tendon material is not internally bonded due to the low shrinkage grout in the sleeve,
A drawback force was transmitted to this, and there was a problem that the wire was broken at the forked intersection.

[0004] Further, a plurality of cuts are made at a fixing end portion in a sleeve, and the sleeve is divided. A wedge-shaped FRP tendon is inserted into each of the cuts, and an epoxy-based adhesive is applied. A wedge adhesive fixing system that solidifies and integrates by filling (JP-A-60-203762)
However, there was a problem in the stability of the epoxy-based adhesive, and it was difficult to obtain sufficient adhesive strength.

[0005] A special wedge fixing system (Japanese Patent Laid-Open No. 60-258370) is also known in which an FRP tendon material inserted into a sleeve is fixed with a double wedge inside and outside. A special tensioning device for pushing the wedge into the sleeve is required, and it is very difficult to apply the tensioning material having irregularities to the wedge fixing the tensioning material directly.

Further, a reinforcing fiber is wound around the fixing end portion of the FRP tendon material in a tapered shape to form a wedge, and the wedge-shaped end portion is fixed by a fiber winding wedge fixing system (Japanese Patent Laid-Open No.
Japanese Patent Application Publication No. 0-203763) is also known, but requires complicated processing of winding fibers around the FRP tendon at the factory, and is concerned about the strength of the wound fiber layer itself and the adhesive strength of the layer to the tendon. However, there was a problem that the reliability of fixing a large tension was poor.

As an indirect fixation, a wedge fixing method with a cushioning material in which a buffer material is coated on a FRP tendon and fixed by a wedge is also known, but depending on the selection of the cushioning material and the presence of oily water. There was a disadvantage that the fixing efficiency was impaired.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to solve the difficulty of fixing an FRP tendon having a low friction surface.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a fixing sleeve which has been developed by the applicants and has already been filed as Japanese Patent Application No. 1-324618, the inner surface of which has been subjected to an enhanced friction surface treatment. The end portion of the FRP tendon material subjected to friction increasing treatment is inserted into the fixing sleeve, and the FRP tendon material is filled in the fixing sleeve, and the pressure hardened state is obtained by the expansion hardening of a hydraulic and high-strength grout material having quick-setting and expandability. The fixing sleeve is inserted into the tensioning sleeve using a FRP tensioning material that has been consolidated by the above method, and is consolidated by the grout material filled therein, and the rear end of the tensioning sleeve is made of concrete. The present invention proposes a fixing structure of an FRP reinforcing rod which is fixed by a fixing tool on an outer surface of a member.

Further, according to the present invention, the above-mentioned tensioning sleeve is inserted into a fixed sleeve embedded and integrated at an end of a concrete member, and the FRP tensioning agent is consolidated by a grout material filled in the fixed sleeve in a tensioned state. The present invention proposes a fixing structure of an FRP reinforcing rod which is fixed.

Further, according to the present invention, an end portion of a FRP tendon material whose surface has been subjected to a friction increasing treatment is inserted into a tensioning sleeve, and a quick-setting and expandable hydraulic material filled in the tensioning sleeve is provided. The expansion and hardening of the strength grout material is consolidated under pressure and the tensioning sleeve is inserted into a fixed sleeve embedded and integrated at the end of the concrete member, and the FRP tensioning agent is fixed in a tensioned state. An object of the present invention is to propose a fixing structure of an FRP tendon material which is solidified and fixed by a grout material filled in a sleeve.

Further, according to the present invention, the rear end of the fixing sleeve of the FRP tendon material is inserted into a wedge hole of a fixing plate on the outer surface of the concrete member, and the FRP is fixed by a wedge fitted into the wedge hole. The present invention proposes a fixing structure of a reinforcing rod.

[0013]

The hydraulic high-strength grout material having a quick-setting and expandable property filled in a fixing sleeve having an inner surface subjected to a friction-enhancing surface treatment expands in the radial direction of the sleeve and hardens. With the peripheral surface of the FRP tendon material uniformly compressed with high internal pressure, it is consolidated with high strength in a short time.

The fixing end of the FRP tendon material is subjected to a friction-enhancing treatment with improved surface adhesion properties, such as by winding a reinforcing fiber or using a stranded wire. Fully integrated, the tensile forces acting on the FRP tendon are transmitted to the sleeve via consolidated grout.

On the other hand, the inner surface of the sleeve is blasted,
High frictional surface treatment, such as grinding, is integrated with the high-strength consolidated grout in the compressed state, maintaining a uniform bonding force that sufficiently opposes the tensile force, and high fixing performance and fixing efficiency Excellent fixing part can be obtained.

Then, the fixing sleeve is inserted into the tensioning sleeve and consolidated by a grout material filled therein, and the rear end of the tensioning sleeve is fixed to the outer surface of the concrete member by the fixing tool. By fixing, a plurality of FRP tendon materials can be compositely fixed.

Further, the tensioning sleeve is inserted into a fixed sleeve embedded and integrated at an end of the concrete member, and the FRP tensioning material is fixed and fixed by a grout material filled in the fixed sleeve in a tensioned state. Accordingly, the fixing can be easily performed in a tensioned state by the grout material without the need for a fixing tool such as a nut or a wedge.

Further, the rear end portion of the fixing sleeve of the FRP tensioning material is inserted into a wedge hole of the fixing plate on the outer surface of the concrete member, and is fixed by a wedge fitted in the wedge hole. It can be easily tensioned and fixed using an automatic tension wedge fixing device.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an FRP tendon used in a fixing structure according to the present invention;
Is a synthetic resin rod in which fibers such as carbon, aramid, and glass are blended, and a reinforcing thread or tape of synthetic resin or the like is spirally wound, hoop-shaped, or the like around the entire circumference or at least at the fixing end thereof, and is wound around the circumference Increasing friction treatment has been performed to improve surface adhesion characteristics, such as by forming irregularities, forming innumerable small protrusions on the peripheral surface, or using stranded FRP wires.

A fixing sleeve 2 for fixing the fixing end of the FRP tendon material 1 is formed in a cylindrical shape having openings 3 at both ends as shown in FIG. The surface is subjected to a friction-enhancing surface treatment such as a blast treatment or a grinding treatment for improving the adhesion characteristics of the steel.

In the fixing sleeve 2, an FRP tendon 1
Is inserted into the gap between the periphery thereof and the inner surface of the sleeve 2 with a hydraulic high-strength grout material 4 having quick-setting and expandability, and the inner surface of the sleeve 2 and the FRP tension material 1 are expanded and hardened. Is compacted with high strength in a state where the peripheral surface is uniformly compressed with a high internal pressure.

Accordingly, the FRP tendon material 1 subjected to the friction-increasing treatment is completely integrated with the high-strength consolidated grout 4 in a compressed state in which an internal pressure is applied in the sleeve 2 in the radial direction. Is integrated with the high-strength consolidated grout 4 in a compressed state, and as a result, a uniform bonding force that can sufficiently counter the tensile force of the FRP tendon 1 is maintained.

The required properties of the grout material 4 for achieving the fixing effect of the FRP tendon material 1 include the adhesion strength of the FRP tendon material 1, the bonding force between the sleeve 2 and the grout material 4, the inner diameter and length of the sleeve 2. It is determined from various factors such as the coefficient of friction of the inner surface, and can be expressed by the equation 1 from a mechanical viewpoint according to the structural principle of the present invention shown in FIG.

[0024]

(Equation 1)

[0025] In the above Equation 1, L is the fixing length of the FRP tendon, d is the diameter, A _P is ditto area, l _t is the outer circumferential length, sigma _PU is the tensile strength, sigma _B is the adhesion strength , D is the diameter of the sleeve, l is the same inner circumference, μ is the same coefficient of friction (inner surface),
σ _eP is the grout internal pressure, and σ _e is the same binding force (μ · σ _eP ).

In the above equation, when the diameter d of the FRP tendon is 1.0 cm, the tensile strength σ _PU is 160 kg / mm ² , and the sleeve diameter is 3.0 cm and 2.0 cm, respectively, the inner pressure of the sleeve and the inner friction coefficient are as follows. Table 1 shows the necessary values of the fixing length L (cm) when is changed.

[0027]

[Table 1]

In the above equation, assuming that the adhesive strength σ _B of the FRP tendon material is about 150 kg / cm ² (experimental value), the tensile strength is 160 kg / mm ² , and the diameter d is 1.0 cm.
From the equation on the right side of Equation 1, the fixing length L is 26 cm.

When the fixing length L is 26 cm, Table 1
When the inner diameter of the grout is 200 kg / cm ² or more when the sleeve inner diameter D = 3 cm and the friction coefficient μ = 0.25, the sleeve inner diameter D =
Grout internal pressure is 300kg when 2cm and coefficient of friction μ = 0.25
It can be seen that / cm ² or more is required for design.

When the fixing length L is set to 26 cm in the same manner as described above, the grout expansion pressure when the sleeve friction coefficient μ = 0.25 is 200 kg / cm ² or more, and the grout expansion pressure when the sleeve friction coefficient μ = 0.5. It is found that 100Kg / cm ² or more is required by design.

If the grout strength at this time is set to be at least twice the above internal pressure in consideration of the safety factor in design, the grout strength is 400
Kg / cm ² , 600Kg / cm ² or more can be set.

As described above, the necessary fixing effect can be easily achieved by setting the internal pressure, expansion pressure, strength and the like of the grout material 4 in accordance with the specifications of the fixing specification and adjusting the blending in accordance therewith. A fixing structure can be obtained.

The grout material 4 has expandability for applying an internal pressure to the sleeve 2, has rapid hardening to complete fixing quickly in a short time, and has a high proof stress against a high compressive force. It is necessary to have high strength to hold, Portland cement, calcium aluminate,
A cement paste composed of gypsum, an expandable cement admixture, a setting retarder, and a high-performance water reducing agent, or a mortar obtained by adding fine sand to this paste is used.

As the portland cement in the grout material 4, the portland cement represented by JISR5210, the blast furnace cement represented by JISR5211, the silica cement represented by JISR5212, and the like are used. Things are not preferred.

Calcium aluminate in the grout 4 is obtained by calcining a calcareous raw material, an alumina raw material, or a halogenated compound by a kiln or melting it by an electric furnace to obtain CaO (hereinafter abbreviated as C) and Al ₂ O. ₃ (hereinafter abbreviated as A), CA, C ₃ A, C ₁₂ A ₇
And calcium haloaluminate (X is a halogen element such as Fe or Cl ₂ ) represented by C ₁₁ A ₇ .CaX _{2 in} which a halogen element is dissolved, and the use of these amorphous substances is preferable.

The mixing ratio of this calcium aluminate is such that 10 to 70 parts by weight of clinker powder mainly composed of calcium haloaluminate is added to 30 parts of Portland cement.
~ 90 parts by weight, preferably clinker powder 30
Portland cement is a ratio of 50 to 70 parts by weight to 50 to 50 parts by weight.

Next, when using a clinker powder containing C ₁₂ A ₇ as a main component, a proportion of 70 to 97 parts by weight of Portland cement to 3 to 30 parts by weight of this powder (preferably, clinker powder) 80 to 95 parts by weight of Portland cement to 5 to 20 parts by weight).

In addition to these, alumina cement for refractories according to JIS 2511 can also be used.

The gypsum in the grout material 4 may be dihydrate / anhydrous / hemihydrate gypsum. Condensation may occur and hinder the fixing operation.

Gypsum liberated during the production of the expandable cement admixture described below can also be used.

The amount of gypsum used for the cement grout 4 is 5 to 20 parts by weight based on 100 parts by weight of the mixture of Portland cement and calcium aluminate.

The expansive cement admixture in the grout material 4 refers to quick lime crystals obtained by appropriately mixing raw materials such as limestone, silica stone and clay and firing them in a kiln or melting them in an electric furnace. A clinker made of arit crystals, 30-80
Composition and that an appropriate amount mixed parts by weight gypsum, limestone, properly blended raw material such as alumina raw material and gypsum, a mineral obtained by melting by baking or or an electric furnace by kiln C ₃ A _3. A composition containing CaO ₄ as a main component.

These expandable cement admixtures have a compressive strength of, for example, 600 kg / cm at the time of hardening of the high-strength grout material 4 of the present invention in consideration of the fixing specifications, taking the thickness of the grout material 4 into consideration. ^It is adjusted so that the internal pressure is 400 kg / cm ² or more in the sleeve 2.

The setting retarder in the grout material 4 is a material which comprises one or more of calcium carbonate, citric acid, gluconic acid and the like.
5201 Add an amount for terminating the setting test in the setting test of Cement Physical Test Method for about 10 to 30 minutes.

The high-performance water reducing agent in the grout material 4 is as follows.
Powdered and liquid materials conforming to JIS 6204 "Chemical admixture for concrete" and JIS SST 402 "Quality standard for superplasticizer for concrete" are used.
To be 40 parts by weight, and by J ₁₄ funnel method described in Japanese Society of Civil Engineering standard Appendix 2 "construction procedure of filling Mortar expansive (draft)" in "Design and Construction guidelines for expanded concrete (draft)" It is preferred that the amount of the falling flow be 3 to 10 seconds.

The F to which the fixing sleeve 2 having the above structure is fixed.
2 to 7 show an embodiment of the fixing structure of the present invention in which a prestress is introduced into the concrete member 5 by using the RP tendon 1 to fix the member.

In the first embodiment shown in FIGS. 2 and 3, the fixing sleeve 2 of one or a plurality of FRP tensioning materials 1 is inserted into the tensioning sleeve 6 and consolidated by the grout material 7 filled therein. After the integration, the tension rod 8 is connected to the rear end of the tensioning sleeve 6, and the concrete member 5 is stretched while the FRP tensioning material 1 wrapped in the sheath 9 is tensioned.
Washer 1 with nut 10 as a fixing tool on the outer surface of
1 has been established.

In this case, the tensioning sleeve 6 is provided with an external thread 12 for screwing the nut 10 around its outer periphery.
A female screw 14 for screwing the tension rod 8 is provided on the inner periphery of the rear end behind the partition wall 13 for closing the rear portion of the inner space.
Are formed.

A synthetic resin tape 15 is integrally wound around the periphery of the opening of the tensioning sleeve 6 and the periphery of the FRP tensioning material 1 (plural pieces), and the grout material 7 filled in the tensioning sleeve 6 is sealed. .

A fixing plate and a wedge are used as a fixing device for the tensioning sleeve 6, and the tensioning sleeve 6 is inserted into a tapered hole provided in the fixing plate so that the fixing is performed by the wedge fitted to the outer peripheral portion. You may.

In order to enhance the integration with the tensioning sleeve 6, a male screw is provided around the distal end of the fixing sleeve 2 and screwed into a female screw hole provided in the partition wall 13.
Alternatively, the nut may be fastened with a nut through a through hole provided in the partition wall 13.

It is preferable to use the above-mentioned grout material 4 as the grout material 7 to be filled in the tensioning sleeve 6, but it is necessary to have expandability since the adhesion to the grout can be ensured on the outer periphery of the fixing sleeve 2. Without using a general mortar, which is quick-setting and relatively high in strength, can be used.

The second embodiment shown in FIG.
The fixing sleeve 2 of the RP tendon 1 is replaced with the tension sleeve 1
6 and consolidated by a grout material 17 filled therein, and the tensioning sleeve 16 is inserted into a fixed sleeve 18 embedded and integrated at the end of the concrete member 5, and then into the rear end. The tension rod 8 is connected to tension the FRP tension member 1, and the tension is fixed by the nut 19 and the washer 20, and the grout is fixed and integrated by the grout material 21 filled in the fixing sleeve 18 to fix the grout. .

In the tensioning sleeve 16 in this case, a female screw 23 for screwing the tension rod 8 is formed on the inner periphery of the rear end behind the partition wall 22 that seals the inner rear portion.

Further, the fixing sleeve 18 has a reinforcing rib 2 provided on the outer periphery of the rear end to lock the rear end thereof to the end face of the concrete member 5 and sufficiently oppose the tension of the FRP tendon 1.
A support plate 25 reinforced with 4 is provided, and a grout injection hole (not shown) is provided between the inside thereof and the surface of the concrete member 5.

In this case, the grouting materials 7 and 21 to be filled in the tensioning sleeve 16 and the fixed sleeve 18 are as follows.
It is preferable to use the above-mentioned grout material 4, but since it is possible to secure the adhesiveness to the grout on the outer periphery of the fixing sleeve 2 and the tensioning sleeve 16, it is not necessarily required to have expandability, and it is generally fast-setting and has relatively high strength. Mortar or the like can be used.

After the grout material 21 has hardened, the nut 1
8 and the washer 19 are removed and diverted to another construction.

The third embodiment shown in FIG. 5 is a modification of the second embodiment, and uses the FRP tension member 1 without using the fixing sleeve 2.
Is inserted directly into the tensioning sleeve 16 and consolidated by an inflatable grout material 26 similar to the grout material 4 filled therein. This is inserted into the fixed sleeve 18 and the grout material 21 is inserted. Thus, the step of solidifying and integrating the fixing sleeve 2 becomes unnecessary.

In the fourth embodiment shown in FIGS. 6 and 7, the FRP tension member 1 is fixed to the fixing sleeve 2 by wedges using a conventional automatic tension fixing device (strong hold jack) for tension steel. .

When the FRP tensioning material 1 is tension-fixed using this automatic tension fixing device, as shown in FIG. 6, a fixing sleeve 2 having a long fixing length is used, and the FRP tensioning member 1 is first embedded in the end face of the concrete member 5. The fixing sleeve 2 is inserted through the tapered hole of the anchor head 28 attached to the fixing plate 27 and the through hole of the wedge pressing plate 29, and the distal end portion is inserted into the tapered hole provided at the distal end of the piston 31 of the cylinder 30. Then, in this state, the piston 31 is extended by hydraulic pressure to grip the fixing sleeve 2 by the tension wedge 32 and to tension the FRP tension member 1.

In this tension state, as shown in FIG. 7, the anchor head pressing cylinder 33 and the wedge pressing cylinder 3
The anchor 4 is extended by hydraulic pressure to press the anchor head 28 against the fixing plate 27, and the fixing wedge 35 is pushed into the tapered hole of the anchor head 28 for fixing.

[0062]

As described above, according to the present invention, the following effects can be obtained.

1) A fast-setting and expandable hydraulic high-strength grout material filled in the fixing sleeve expands in the radial direction of the sleeve and hardens, and the inner surface of the sleeve and the F
The peripheral surface of the RP tendon can be consolidated in a state where it is uniformly compressed with a high internal pressure, and can be integrated with the FRP tendon with high strength in a short time.

2) The fixing end of the FRP tendon material is subjected to a friction-enhancing treatment with an improved surface adhesion characteristic, and the inner surface of the sleeve is subjected to a friction-enhancing surface treatment such as a blast treatment or a grinding treatment. Each of them is fully integrated with the consolidated grout which has high compressive strength, and maintains a uniform bonding force that sufficiently opposes the tensile force acting on the FRP tendon, and has high fixing performance and fixing efficiency. An excellent fixing structure can be achieved.

3) The internal pressure, strength and the like of the grout material depend on the composition of the expandable grout and the filling thickness of the grout material.
It can be easily adjusted according to the fixing specifications.In addition, since the grout material has high strength, it can withstand high internal pressure, obtain high compressive strength, and compared with resin-based adhesives conventionally used for fixing. It is much cheaper and more economical.

4) The fixing sleeve can be securely consolidated by the grouting material filled in the tensioning sleeve, and the rear end of the tensioning sleeve is fixed on the outer surface of the concrete member by the fixing tool, so that a plurality of fixing sleeves can be formed. FRP tendon can be compositely fixed with a simple fixing structure.

5) Insert the tensioning sleeve into the fixed sleeve embedded and integrated at the end of the concrete member, and
By fixing and fixing the P tension member in a tensioned state with the grout material filled in the fixing sleeve, the fixation can be performed simply and economically with the grout material without the need for a fixing tool such as a nut or a wedge. It is easy to cope with large elongation of the tendon.

6) The FRP tensioning material is directly inserted into the tensioning sleeve and solidified and integrated with the filled grout material, thereby reducing the number of steps and members for fixing the fixing sleeve, and economically performing fixing work. can do.

7) The rear end of the FRP tendon fixing sleeve is inserted into the wedge hole of the fixing plate on the outer surface of the concrete member, and the FRP tendon is fixed by the wedge fitted into the wedge hole. Can be easily fixed using an automatic tension wedge fixing device.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a fixing sleeve for an FRP tendon according to the present invention.

FIG. 2 is a longitudinal side view of a tensioning sleeve used in the first embodiment of the present invention.

FIG. 3 is a vertical side view of the first embodiment of the present invention.

FIG. 4 is a longitudinal sectional side view of a second embodiment of the present invention.

FIG. 5 is a longitudinal sectional side view of a third embodiment of the present invention.

FIG. 6 is a vertical sectional side view showing one embodiment of a process according to a fourth embodiment of the present invention.

FIG. 7 is a vertical sectional side view showing another embodiment of the process of the fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 FRP tension material 2 Fixing sleeve 3 Opening 4 Grout material 5 Concrete member 6 Tension sleeve 6 7 Grout material 8 Tension rod 9 Sheath 10 Nut 11 Washer 12 Male screw 13 Partition wall 14 Female screw 15 Tape 16 Tension sleeve 17 Grout Material 18 Fixing sleeve 19 Nut 20 Washer 21 Grout material 22 Partition wall 23 Female screw 24 Reinforcement rib 25 Support plate 26 Grout material 27 Fixing plate 28 Anchor head 29 Wedge pressing plate 30 Cylinder 31 Piston 32 Tension wedge 33 Anchor head pressing cylinder 34 Wedge pressing cylinder 35 Fixing wedge

Continued on the front page (73) Patent holder 000155698 Arisawa Manufacturing Co., Ltd. 1-5-5 Minamihonmachi, Joetsu-shi, Niigata (73) Patent holder 000003296 Denki Kagaku Kogyo Co., Ltd. 1-4-1 Yurakucho, Chiyoda-ku, Tokyo, Japan (72) Inventor Toshiyuki Tachibada 4-40-6 Higashi-Omiya, Omiya City, Saitama Prefecture (72) Inventor Tomoyoshi Chujo 588 Sekido, Tama-shi, Tokyo (72) Inventor Hironobu Nishiyama 4-32, Mita, Minato-ku, Tokyo Claire Mita 606 (72) Inventor Kentaro Fujii 4-1096-32, Mijimachi, Narashino-shi, Chiba (72) Inventor Satoru Teramura 2209, Aomi-cho, Nishikubiki-gun, Niigata Electrochemical Industry Co., Ltd. .Cl. ⁶ , DB name) E04G 21/12 E04C 5/12

Claims (4)

(57) [Claims] 1. An end portion of an FRP tendon material whose surface is subjected to a friction increasing treatment is inserted into a fixing sleeve having an inner surface subjected to a friction increasing surface treatment, and the FRP tendon material is filled in the fixing sleeve. FR that is consolidated in a pressurized state by expansion-hardening of a hydraulic high-strength grout material that has quick-setting and expandability
Using a P tension member, the fixing sleeve is inserted into the tension sleeve, and consolidated by a grout material filled in the tension sleeve. The tension sleeve has a rear end portion formed on the outer surface of the concrete member. A fixing structure for an FRP tendon material, wherein the fixing device is fixed by a fixing device. 2. An end portion of an FRP tendon material whose surface has been subjected to a friction increasing treatment is inserted into a fixing sleeve having an inner surface subjected to a friction increasing surface treatment, and the FRP tendon material is filled in the fixing sleeve. FR that is consolidated in a pressurized state by expansion-hardening of a hydraulic high-strength grout material that has quick-setting and expandability
The fixing sleeve is inserted into the tensioning sleeve using a P tensioning material, and is consolidated by a grout material filled in the tensioning sleeve, and the tensioning sleeve is embedded and integrated at an end of the concrete member. A fixing structure for an FRP tendon material, wherein the FRP tendon material is fixed and fixed by a grout material which is inserted into the fixed sleeve and filled in the fixed sleeve in a tensioned state. 3. An end portion of an FRP tendon material whose surface has been subjected to a friction increasing treatment is inserted into a tensioning sleeve, and a fast-setting and expandable hydraulic high-strength grout material filled in the tensioning sleeve. The tensioning sleeve is inserted into a fixed sleeve embedded and integrated at the end of the concrete member, and the FRP tendon material is inserted into the fixed sleeve in the tensioned state by the expansion hardening of the concrete member. A fixing structure for an FRP tendon material, which is fixed and fixed by a filled grout material. 4. An end portion of an FRP tendon material whose surface has been subjected to friction increasing treatment is inserted into a fixing sleeve whose inner surface has been subjected to friction increasing surface treatment, and the FRP tendon material is filled in the fixing sleeve. FR that is consolidated in a pressurized state by expansion-hardening of a hydraulic high-strength grout material that has quick-setting and expandability
The FRP tensioner is characterized in that the fixing sleeve is inserted through a wedge hole of a fixing plate on the outer surface of the concrete member at a rear end portion thereof, and is fixed by a wedge inserted into the wedge hole. Material fixing structure.