JP6830763B2 - Seismic retrofitting material - Google Patents

Description

The present invention relates to a rod-shaped seismic reinforcing material.

As seismic reinforcement of buildings such as reinforced concrete buildings and wooden houses, existing buildings are reinforced with steel braces, and joints such as beams, foundations, columns and braces are reinforced with hardware. Or, steel plates are wrapped around pillars.
In addition, in traditional buildings such as temples and shrines, temples, old folk houses, and station buildings, it is necessary to improve earthquake resistance while maintaining the aesthetic appearance. For this reason, reinforcement using a large steel frame, which is applied to general buildings, is not preferred, and metal fittings and the like for joints that are not so conspicuous have been studied (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-170373

However, it is difficult to provide sufficient seismic resistance while maintaining the aesthetic appearance of traditional buildings with only the metal fittings at the joints. For this reason, seismic retrofitting is being carried out at the expense of aesthetics, such as wrapping steel plates around columns.
On the other hand, buildings that can be retrofitted by wrapping steel plates, etc. are still good, but there are some buildings that cannot be retrofitted. For example, since the mass of seismic retrofitting material such as steel plate or steel is large, the traditional building itself cannot withstand the mass of the seismic retrofitting material. Such a problem becomes a problem especially when a seismic reinforcing material is used for an upper layer of a building such as a roof or a beam of a building.
In addition, since the mass of steel plates and steel streaks is large, it is necessary to use heavy machinery to bring them to the construction site and perform construction, but the places where traditional buildings are built are heavy machinery. There are many places that cannot be accommodated, and especially in high-rise buildings, such matters become a problem, and improvement is particularly desired.
Therefore, an object of the present invention is to provide a seismic retrofitting material which is lightweight and strong and can suppress deterioration of the appearance quality of a traditional building.

The present invention provides:
<1> a joint made of a fiber-reinforced composite material, comprising: a coupling having a hollow portion at least one end, is inserted into the hollow portion of the joint, and a first rod-like fiber-reinforced composite material that is bonded , wherein the first rod-like fiber-reinforced composite material, the strand structure by twisting strands comprising the fiber bundle which is integrated by the solidifying agent, or Ru multistrand structures der combined twisting the strands structure Seismic reinforcement.
<2> The seismic retrofitting material according to <1>, wherein the joint and the first rod-shaped fiber reinforced composite material are joined with an adhesive.
<3> The joint also has a hollow portion at the other end portion to which the first rod-shaped fiber reinforced composite material is not joined, and the hollow portion at the other end portion has a second hollow portion. The seismic retrofitting material according to <1> or <2>, wherein a rod-shaped fiber reinforced composite material or a metal material is inserted and joined.
< 4 > The seismic retrofitting material according to any one of <1> to <3>, wherein the joint has a density of 1.0 to 5.0 g / cm ³ .
< 5 > The seismic retrofitting material according to any one of <1> to <4>, wherein the joint has a mass of 50 to 5000 g / m.
< 6 > The seismic retrofitting material according to any one of <1> to < 5 >, wherein the density of the first rod-shaped fiber reinforced composite material is 1.0 to 2.5 g / cm ³ .
< 7 > The seismic retrofitting material according to any one of <1> to < 6 >, wherein the mass of the first rod-shaped fiber reinforced composite material is 2 to 150 g / m.
< 8 > The seismic retrofitting material according to any one of <1> to < 7 >, wherein the first rod-shaped fiber reinforced composite material has a tensile strength of 100 to 5000 MPa.
< 9 > The seismic retrofitting material according to any one of <1> to < 8 >, which has a breaking load of 3 to 300 kN.
< 10 > The seismic retrofitting material according to any one of <1> to < 9 >, wherein the total mass is 5 kg or less.

According to the seismic retrofitting material of the present invention, since the seismic retrofitting material is lightweight but has excellent tensile strength and tensile strength such as breaking load, it is built in a place where heavy machinery such as a crane car cannot enter. It is possible to perform seismic retrofitting of traditional buildings and traditional buildings that could not be retrofitted because they could not withstand the mass of conventional seismic retrofitting materials, and it is also possible to suppress deterioration of the appearance due to seismic retrofitting.

It is a perspective view which shows the end part of the seismic retrofitting material in embodiment of this invention. It is a figure which shows the 1st modification example of a rod-shaped fiber reinforced composite material. It is a figure which shows the example of binding by another restraint material. It is a figure which shows the example of binding by another restraint material. It is a figure which shows the example of binding by another restraint material. It is a figure which shows the 2nd modification of the rod-shaped fiber reinforced composite material.

Hereinafter, embodiments of the seismic reinforcing material according to the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments and is arbitrarily modified as long as the gist of the present invention is not deviated. Can be implemented. In addition, when the expression "-" is used in the present specification, it is used as an expression including numerical values before and after the expression.

(Seismic retrofitting material)
FIG. 1 is a perspective view showing an end portion of a seismic retrofitting material according to an embodiment of the present invention.
As shown in FIG. 1, the seismic retrofitting material 10 in the embodiment of the present invention is composed of a joint 11 made of a fiber reinforced composite material and a rod-shaped fiber reinforced composite material 12 joined to the joint 11. The joint 11 has a hollow portion 11a on at least one of them. The rod-shaped fiber reinforced composite material 12 is inserted into the hollow portion 11a of the joint 11 and joined.

It is desirable that the seismic retrofitting material 10 of the present embodiment has a breaking load of 3 to 300 kN. Depending on the location and construction methods used as seismic reinforcement, it is preferable that the lower limit value is more than 5 kN, more preferably at least 10k N, further preferably at least 30 kN. When the breaking load is 3 kN or more, the seismic retrofitting material 10 having excellent strength can be obtained.

On the other hand, the upper limit is preferably 200 kN or less, and more preferably 100 kN or less. If it exceeds 300 kN, the joint 11 and the rod-shaped fiber reinforced composite material 12 become thick, and the seismic reinforcing material 10 becomes heavy. Further, it is necessary to increase the thickness or length of the joint 11, increase the strength of the joint between the joint 11 and the rod-shaped fiber reinforced composite material 12, or increase the strength of the joint between the joint 11 and other members. There is a risk that the exterior quality of the earthquake-resistant reinforced building will be impaired.

It is desirable that the density of the rod-shaped fiber reinforced composite material 12 is 1.0 to 2.5 g / cm ³ . The lower limit is preferably 1.2 g / cm ³ or more, and more preferably 1.4 g / cm ³ or more. If it is 1.0 g / cm ³ or more, a seismic retrofitting material 10 having excellent strength can be obtained. On the other hand, the upper limit is preferably 2.2 g / cm ³ or less, more preferably 2.0 g / cm ³ , and even more preferably 1.8 g / cm ³ or less. If it is 2.5 g / cm ³ or less, a light seismic reinforcing material 10 can be obtained.

Further, the mass of the rod-shaped fiber reinforced composite material 12 is preferably 2 to 150 g / m. The lower limit is preferably 5 g / m or more, more preferably 10 g / m, and even more preferably 40 g / m or more. If it is 2 g / m or more, a seismic retrofitting material 10 having excellent strength can be obtained. On the other hand, the upper limit is preferably 120 g / m or less, more preferably 100 g / m or less. If it is 150 g / m or less, a light seismic retrofitting material 10 can be obtained.

Further, it is desirable that the rod-shaped fiber reinforced composite material 12 has a tensile strength of 100 to 5000 MPa. The lower limit is preferably 500 MPa or more, and more preferably 1000 MPa or more. If it is 100 MPa or more, a seismic retrofitting material 10 having excellent strength can be obtained. On the other hand, the upper limit value is preferably 4000 MPa or less, more preferably 3000 MPa or less. If it exceeds 5000 MPa, the seismic retrofitting material may become heavy or lose its flexibility, and it may not be possible to wind it up and move or store it.

The joint 11 and the rod-shaped fiber reinforced composite material 12 can be joined by using an adhesive. Examples of the adhesive include epoxy-based, melamine-based, silicone-based, phenol-based, natural rubber, rubber-based adhesives such as synthetic rubber, α-olefin-based, acrylic-based, vinyl acetate-based, and urethane-based adhesives.

Further, the hollow portion 11a of the joint 11 and the joint portion of the rod-shaped fiber reinforced composite material 12 with the joint 11 may be joined by providing unevenness. For example, the hollow portion 11a of the joint 11 may be provided with a concave portion, and the rod-shaped fiber reinforced composite material 12 may be provided with a convex portion for joining. Further, a female screw and a male screw may be formed and joined by cutting a screw in the hollow portion 11a of the joint 11 and the insertion portion of the hollow portion 11a of the rod-shaped fiber reinforced composite material 12.

If a metal joint and a rod-shaped fiber reinforced composite material are to be joined, the adhesive force of the adhesive to the metal and the adhesive force to the rod-shaped fiber reinforced composite material are significantly different, so that the hollow portion of the metal joint is covered. If unevenness is not provided by cutting a screw or the like, the strength of the joint between the metal joint and the rod-shaped fiber reinforced composite material may not be sufficient.

However, in the present embodiment, as will be described later, since resins are used for both the joint 11 and the rod-shaped fiber reinforced composite material 12, an adhesive having excellent adhesive strength is used for each resin. As a result, the seismic retrofitting material 10 having excellent strength can be easily obtained without giving unevenness such as cutting a screw to the hollow portion 11a of the joint 11. Therefore, the strength of the joint 11, the rod-shaped fiber reinforced composite material 12, and the joint portion thereof can be easily balanced, the appearance quality is excellent, and the seismic retrofitting material 10 having stable strength can be obtained.
Further, since the joint 11 is a fiber reinforced composite material, it is lighter than metal, and the obtained seismic reinforcing material 10 is also lighter.
Further, for bonding the joint 11 and the rod-shaped fiber reinforced composite material 12, of course, an adhesive and a material having irregularities may be used in combination.

Further, the open hollow portion 11a at the end of the joint 11 may be provided at the other end to which the rod-shaped fiber reinforced composite material 12 of the joint 11 is not joined. Further, the joint 11 may have hollow portions 11a at both ends, and the rod-shaped fiber reinforced composite material 12 may be joined to both ends of the joint 11. Further, a rod-shaped fiber reinforced composite material 12 is joined to one of the joints 11, and a metal material such as a round steel reinforcing bar or a round steel threaded reinforcing bar, a deformed reinforcing bar, a column or a beam is joined to the other one. A fixing jig for attaching the seismic retrofitting member 10 of the present embodiment may be joined to the above.

When a metal reinforcing material is used, it is preferable that the surface of the reinforcing material has irregularities from the viewpoint of adhesive strength with the joint 11.
When a metal material is joined to one of the joints 11 and used, the metal material is used so as to be directly connected to a column or beam by welding, bolts, nails, wires, plates, or the like. As a result, the load on the building is reduced.
Further, the joint 11 may be partially hollow in the vicinity of one end or in the vicinity of both ends, and the other portion may not be hollow, or from one end to the other. It may be a tubular object that penetrates to the end.

The length of the joint 11 of the present embodiment may be set according to the required strength, but is preferably 10 mm to 1000 mm. Further, the thickness of the outer diameter may be set according to the required strength, but 3 mm to 500 mm is preferable. From the viewpoint of the appearance of the building after construction, the length of the joint 11 is preferably short, the thickness of the joint 11 is preferably thin, and the length is more preferably 50 cm or less, 30 cm or less, and 20 cm or less. The thickness is more preferably 10 cm or less, 5 cm or less, and 3 cm or less. Further, the length and thickness of the joint 11 of the hollow portion 11a in the length direction may also be set according to the strength required for the seismic retrofitting material 10 and the thickness and strength of the rod-shaped fiber reinforced composite material 12, but the hollow portion The length of the joint 11 of 11a in the length direction is preferably 10 mm to 500 mm, and the thickness of the hollow portion 11a is preferably 2 mm to 250 mm.

In addition, in the tensile material using a general M12 steel bolt, a breaking load of 46 kN is used, but in order to obtain a breaking load of 46 kN in this embodiment, the length of the joint is used. Is preferably 20 cm or more.
If the length of the joint is less than 20 cm and a load of 46 kN is applied, the joint may be broken due to slippage between the inner layer and the outer layer of the joint. In the case of a seismic retrofitting material that can withstand a breaking load of 46 kN, the length of the joint is preferably 25 cm or more.
Further, the insertion length of the rod-shaped fiber reinforced composite material 12 into the joint 11 at that time is preferably 8 cm or more. More preferably 10 cm or more, still more preferably 12 cm or more. If the insertion length is less than 8 cm, the rod-shaped fiber reinforced composite material 12 may come off from the joint 11 when a load of 46 kN is applied.
Further, when a general M12 steel bolt is inserted into the other one of the joint 11, the insertion length is preferably 6 cm or more, more preferably 8 cm or more. If the insertion length is less than 6 cm, the steel bolt of M12 may come off from the joint 11.
Further, when the seismic isolation reinforcing material 10 is broken when a certain force or more is applied to impart seismic isolation to the building, the joint 11 is connected to the rod-shaped fiber reinforced composite material 12 or the joint 11. At least one of the members may be pulled out of the joint 11 with a certain force or more, the strength may be such that the joint 11 is broken, or ultra-low yield steel may be used as the other member.

Further, in the seismic retrofitting material 10 of the present embodiment, at least one of the joint 11 and the rod-shaped fiber reinforced composite material 12 may be colored. As will be described later, the joint 11 and the rod-shaped fiber reinforced composite material 12 are easier to color than being a composite material of fibers and resin, and can be colored in any color. Therefore, it is possible to further suppress the deterioration of the appearance quality by matching the color of the reinforced portion of the building to be seismically reinforced.

Further, the total mass of the seismic retrofitting member 10 of the present embodiment is preferably 5 kg or less. It is preferably 3 kg or less, more preferably 1 kg or less. The total mass of the seismic retrofitting material 10 varies depending on the length, thickness and material of the rod-shaped fiber reinforced composite material 12, the thickness, length and material of the joint 11, and other materials to be joined, but no heavy machinery or the like is used. In both cases, 5 kg or less is preferable from the viewpoint of transportability and workability in high places. With the seismic retrofitting material of the present embodiment, a seismic retrofitting material having the above mass or less can be easily obtained. The lower limit is not particularly limited, but is preferably 5 g or more from the viewpoint of strength.

(Joining)
The joint 11 of the present embodiment is a member for joining the rod-shaped fiber reinforced composite material 12 and another member, is made of the fiber reinforced composite material, and has a hollow hollow portion 11a in which at least one of them is open. It is a columnar object.
The density of the joint 11 is preferably 1.0 to 5.0 g / cm ³ . The upper limit value is preferably 4.0 g / cm ³ or less, more preferably 3.0 g / cm ³ or less, and further preferably 2.0 g / cm ³ or less. If the density is 5.0 g / cm ³ or less, a light seismic reinforcing material 10 can be obtained.
On the other hand, the lower limit value is preferably 1.3 g / cm ³ or more, and more preferably 1.5 g / cm ³ or more. When the density is 1.0 g / cm ³ or more, a seismic retrofitting material 10 having sufficient strength can be obtained.

The mass is preferably 50 g / m to 5000 g / m. The upper limit is preferably 2000 g / m or less, more preferably 1000 g / m, and even more preferably 500 g / m or less. If the mass is 5000 g / m or less, a light seismic retrofitting material 10 can be obtained. On the other hand, the lower limit is preferably 100 g / m or more, more preferably 200 g / m or more, and further preferably 300 g / m or more. When the mass is 50 g / m or more, a seismic reinforcing material having sufficient strength can be obtained.

The joint 11 is made of a fiber-reinforced composite material, and is formed by molding, solidifying, and integrating the fiber material and the solidifying agent.
Examples of the fiber material used include carbon fiber, basalt fiber, para-aramid fiber, meta-aramid fiber, ultrahigh molecular weight polyethylene fiber, polyarylate fiber, PBO (polyparaphenylene benzoxazole) fiber, and polyphenylene sulfide (PPS). Fibers, polyimide fibers, fluorine fibers, polyvinyl alcohol (PVA fibers) and the like can be used. The fiber material used is particularly preferably carbon fiber or glass fiber from the viewpoint of flame retardancy, strength, and light resistance. Glass fiber is preferable from the viewpoint of flame retardancy. Further, from the viewpoint of improving the breaking strength of the obtained seismic reinforcing material 10, it is preferable to use the same fiber material as that used for the rod-shaped fiber reinforced composite material 12.

Further, as the solidifying agent used for the joint 11, either a thermoplastic resin or a thermosetting resin can be used. Further, a solidifying agent having a high affinity with the fiber material is preferable. In particular, since it is possible to give variability by heating, and from the viewpoint of excellent adhesiveness when the joint 11 and the rod-shaped fiber reinforced composite material 12 are joined using an adhesive, a solidifying agent. A thermoplastic resin is preferably used.
As the solidifying agent, specifically, polyetheretherketone (PEEK), polypropylene, polyethylene, polystyrene, polyamide (nylon 6, nylon 66, nylon 12, nylon 42, etc.), ABS resin, acrylic resin, vinyl chloride resin, chloride. Vinylidene resin, polyphenylene oxide, polybutylene terephthalate, polyethylene terephthalate, unsaturated polyester, polysulfon, polyethersulfone, polyetherimide, polyallylate, epoxy resin, urethane resin, polyimide resin, phenol resin, silicone resin, polycarbonate resin, resorcinol Examples include, but are not limited to, resin. From the viewpoint of adhesiveness, a thermoplastic epoxy resin is preferable. Further, a resin similar to the resin used in the rod-shaped fiber reinforced composite material 12 is preferable from the viewpoint of adhesiveness.

In addition to the above materials, a curing agent, a catalyst, a cross-linking agent, a colorant such as a pigment, a catalyst, an ultraviolet absorber, an antioxidant, a light resistance improver, and the like may be contained.

The shape of the joint 11 of the present embodiment is preferably columnar, and the cross-sectional shape in the length direction thereof is not particularly limited to polygons such as circles, ellipses, triangles, quadrangles, pentagons, and hexagons. From the viewpoint of strength, a circular shape is preferable.
As the joint 11, specifically, a plastic alloy (registered trademark) provided by Agc Matex Co., Ltd. or the like can be used.

Further, as the joint 11 of the present embodiment, using a mold in which the shape of the joint 11 is formed as a recess, a mold containing a resin and a fiber material cut to an arbitrary length is injected into the mold, and heating, heating and addition are performed. Examples thereof include a method of manufacturing by performing pressure, cooling, and the like. In addition, a plurality of long fiber fiber materials are arranged in parallel in a hollow shape, and while the fiber materials are moved in the fiber axis direction, they are immersed in a resin solution and passed through a mold for forming a hollow portion to be long. An example is a manufacturing method in which a hollow tubular portion of the above is manufactured and then cut to an arbitrary length to obtain a joint. According to this method, the fiber axial direction of the fiber material is arranged in the same direction as the length direction of the joint 11. From the viewpoint of improving the tensile strength such as the breaking strength of the obtained seismic reinforcing material 10, it is preferable that the fiber axial direction of the fiber material is arranged in the same direction as the length direction of the joint 11.
The manufacturing method of the joint 11 of the present embodiment is not limited to the above manufacturing method.

(Stick fiber reinforced composite material)
The rod-shaped fiber-reinforced composite material 12 of the present embodiment is a fiber bundle formed by bundling fiber materials integrated with a solidifying agent.
Examples of the fiber material used include carbon fiber, basalt fiber, para-aramid fiber, meta-aramid fiber, ultrahigh molecular weight polyethylene fiber, polyarylate fiber, PBO (polyparaphenylene benzoxazole) fiber, and polyphenylene sulfide (PPS). Fibers, polyimide fibers, fluorine fibers, polyvinyl alcohol (PVA fibers) and the like can be used. The fiber material used is particularly preferably carbon fiber or glass fiber from the viewpoint of flame retardancy, strength, and light resistance. Glass fiber is preferable from the viewpoint of flame retardancy. Further, from the viewpoint of the tensile strength of the seismic retrofitting material, it is preferable to use the same fiber material as that used for the joint.

Hereinafter, a detailed description will be given of an example in which carbon fiber is used as the fiber material, particularly carbon fiber is used as the core material of the rod-shaped fiber reinforced composite material 12. Hereinafter, the rod-shaped fiber reinforced composite material 12 using carbon fiber as a core material is also referred to as a rod-shaped carbon fiber composite material 12. It does not exclude those using fiber materials other than carbon fiber.

A carbon fiber bundle in which a plurality of carbon fibers (usually thousands to hundreds of thousands, or millions) are bundled is used. The carbon fiber bundle may have an arbitrary cross section such as a circular shape or a flat shape when cut perpendicularly to the length direction of the carbon fiber bundle, but a circular shape is preferable. In the rod-shaped carbon fiber composite material 12 of the present embodiment, it is preferable that the bundles of carbon fibers are integrated with a solidifying agent in a state of being twisted a predetermined number of times. The number of twists of the carbon fiber bundle will be described later, such as the resistance to the bending stress of the obtained rod-shaped fiber reinforced composite material 12, the anti-breaking property of the carbon fiber bundle, the strength against the twist of the carbon fiber bundle (the carbon fiber yarn is not broken by the twist), and the number of twists. In the step of obtaining the rod-shaped fiber reinforced composite material 12-1, the carbon fiber bundle pops out from between the restraining materials before the solidifying agent is applied and the carbon fiber bundle and the restraining material are integrated (peeling). ) Is decided in consideration of avoiding things.
The number of twists of the carbon fiber bundle is 0 to 100 times / m, preferably 2 to 50 times / m, more preferably 5 to 40 times / m, and further preferably 10 to 30 times / m.

The rod-shaped fiber reinforced composite material 12 preferably has a diameter of 0.5 to 20 mm, more preferably 1 to 5 mm in diameter. The diameter of the rod-shaped fiber reinforced composite material 12 of the present embodiment is the diameter of the cross section cut perpendicularly to the length direction of the rod-shaped fiber reinforced composite material 12 integrated with the solidifying agent so as to be the target diameter. The diameter of the carbon fiber bundle and the amount of the solidifying agent applied are selected. When the cross section of the rod-shaped fiber reinforced composite material 12 when cut perpendicularly to the length direction is not a circle, the major axis of the cross section is called a diameter.
Further, the cross section of the rod-shaped fiber reinforced composite material 12 when cut perpendicularly to the length direction may be circular, flat, or the like, but a circular shape is preferable. The strength of the obtained rod-shaped fiber-reinforced composite material 12 is stabilized, and also when the rod-shaped fiber-reinforced composite material 12-1 or the rod-shaped fiber-reinforced composite material 12-2, which will be described later, is used as a strand structure or a multi-strand structure. , A stable strand structure can be obtained.
Further, when the diameter of the rod-shaped fiber reinforced composite material 12 is 0.5 to 20 mm (more preferably 1 to 5 mm), the rod-shaped fiber reinforced composite material 12 and the rod-shaped fiber reinforced composite material 12-1 and rod-shaped described later will be described later. The fiber-reinforced composite material 12-2 (strand structure or multi-strand structure) can be easily wound around the drum, and the flexibility such as following an arbitrary shape can be enhanced.

As the carbon fiber of the present embodiment, either polyacrylonitrile (PAN) -based carbon fiber or pitch-based carbon fiber can be used. Among these, the PAN-based carbon fiber yarn is preferable from the viewpoint of the balance between the strength and the elastic modulus of the obtained rod-shaped fiber reinforced composite material 12.
In addition, the carbon fiber bundles in which these carbon fibers are bundled include 3000 (3K), 6000 (6K), 12000 (12K), 24000 (24K), and 40,000 carbon fibers supplied by the carbon fiber manufacturer. One or a plurality (two or more) of carbon fiber bundles bundled in 40K), 60,000 fibers (60K), etc. can be used depending on the required strength. The number of carbon fiber bundles in the case of bundling a plurality of carbon fiber bundles in which carbon fibers are bundled is not particularly limited and is appropriately determined according to the intended use, but is usually 100 or less.

As the solidifying agent of the present embodiment, either a thermoplastic resin or a thermosetting resin can be used. Further, a solidifying agent having a high affinity for carbon fibers is preferable. In particular, as a solidifying agent, it can be made variable by heating, and from the viewpoint of excellent adhesiveness when the joint 11 and the rod-shaped fiber reinforced composite material 12 are joined using an adhesive. Thermoplastic resin is preferably used.
Suitable specific examples include polyetheretherketone (PEEK), polypropylene, polyethylene, polystyrene, polyamide (nylon 6, nylon 66, nylon 12, nylon 42, etc.), ABS resin, acrylic resin, vinyl chloride resin, vinylidene chloride resin. , Polyphenylene oxide, polybutylene terephthalate, polyethylene terephthalate, polysulfone, polyethersulfone, polyetherimide, polyarylate, epoxy resin, urethane resin, polyimide resin, phenol resin, silicone resin, polycarbonate resin, resorcinol resin, etc. , Not limited to this.

Of these, polyetheretherketone (PEEK), acrylic resin, vinyl chloride resin, vinylidene chloride resin, polyethylene resin, epoxy resin, urethane resin, polycarbonate resin, and resorcinol resin are preferable from the viewpoint of durability against acids and alkalis. In particular, it has excellent impact resistance, and an epoxy resin is suitable. Moreover, if it is a thermoplastic epoxy resin, it can be dissolved in a ketone solvent, and the material can be separated and recycled. Further, from the viewpoint of heat resistance, a polyimide resin and a silicone resin are preferable.
Further, from the viewpoint of excellent adhesiveness when the joint 11 and the rod-shaped fiber reinforced composite material 12 are joined using an adhesive, a thermoplastic epoxy resin is preferably used as the solidifying agent.

Further, among the thermoplastic epoxy resins, a polymerization type thermoplastic epoxy resin which is polymerized after being applied to a carbon fiber bundle is preferable, and a polymerization type thermoplastic epoxy resin which is polymerized linearly is particularly preferable.
The carbon fiber bundle used for the core material of the rod-shaped carbon fiber composite material 12 is twisted, and the carbon fiber bundle is covered with a restraining material such as the rod-shaped carbon fiber composite material 12-1 described later. It is difficult to impregnate the inside of the carbon fiber bundle with the resin.
On the other hand, in the polymerization type thermoplastic epoxy resin, the viscosity of the thermoplastic epoxy resin before polymerization can be easily adjusted because the thermoplastic epoxy resin can be diluted with an organic solvent.
Therefore, by using a low-viscosity resin solution diluted with an organic solvent, the rod-shaped carbon fiber composite material 12-1 is covered with a restraining material up to the inside of the twisted carbon fiber bundle. (From the restraining material on the outer circumference to the carbon fiber bundle on the inner side) can be impregnated with the thermoplastic epoxy resin before polymerization. After impregnating the inside of the carbon fiber bundle with the thermoplastic epoxy resin before polymerization, the carbon fiber bundle and the restraining material were integrated with the thermoplastic epoxy resin by polymerizing the polymerization type thermoplastic epoxy resin. A rod-shaped carbon fiber composite material 12 having excellent strength can be obtained.

Further, it is difficult to adjust the viscosity of a general thermoplastic resin used by imparting fluidity by heating and melting, and the crystal arrangement changes by heating and melting, probably because it is generally a crystalline resin. There is a risk that the properties such as strength of the initial resin will change, but since the polymerized thermoplastic epoxy resin is amorphous before and after polymerization, it can be melted or deformed by heating. The risk of alteration is small.

The method of applying the above-mentioned resin (solidifying agent) to the carbon fiber bundle may be a spray coating method or a method of coating the carbon fiber with the resin by a brush, but from the viewpoint of productivity, a dip-nip method or a resin (a resin (solidifying agent)) may be applied. After dipping into the solidifying agent) solution, a method of removing excess resin through a die and adjusting the cross-sectional shape of the cross section perpendicular to the length direction of the carbon fiber bundle is preferable.

Further, the rod-shaped fiber reinforced composite material 12 may be provided with a separate resin layer so as to cover the entire outer periphery of the carbon fiber bundle integrated by the solidifying agent. From the viewpoint of improving nonflammability, it is preferable to provide a resin layer using a polyimide resin, a silicone resin, or a vinyl chloride resin. Further, from the viewpoint of designability, it is preferable to provide a resin layer containing a colorant such as a pigment for coloring. These resin layers can be used with either a thermoplastic resin or a thermosetting resin, but when a thermoplastic resin is used as the solidifying agent, the resin used for the separate layer is also a thermoplastic resin. preferable.

(Modification example 1 of rod-shaped fiber reinforced composite material)
The rod-shaped fiber reinforced composite material of another embodiment of the present invention will be described. FIG. 2 is a diagram showing a first modification of the rod-shaped fiber reinforced composite material.
In the rod-shaped fiber reinforced composite material 12-1 shown in FIG. 2, a fiber bundle 2 formed by bundling fiber materials is bound by winding a restraining material 3a around the fiber bundle 2, and both the fiber bundle 2 and the restraining material 3a are solidified. It is integrated by an agent (not shown).
By forming the structure in which the fiber bundle 2 is bound by winding the restraining material 3a around the fiber bundle 2, the contact area and structural resistance between the rod-shaped fiber reinforced composite material 12-1 and the adhesive are increased, and the joint The adhesive strength between 11 and the rod-shaped fiber reinforced composite 12-1 is improved, which is preferable from the viewpoint of the tensile strength of the obtained seismic reinforcing material and the magnitude of the breaking load.
Since the basic configuration other than the restraining material 3a is the same as that of the rod-shaped fiber reinforced composite material 12, the description thereof will be omitted as appropriate.
Further, in the rod-shaped fiber reinforced composite material 12-1, the same as the rod-shaped fiber reinforced composite material 12, a carbon fiber as a fiber material, particularly a material using carbon fiber as a core material will be described in detail. Hereinafter, the fiber bundle 2 formed by bundling carbon fibers is also referred to as a carbon fiber bundle 2. It does not exclude those using fiber materials other than carbon fiber.
Further, the rod-shaped fiber reinforced composite material 12-1 is also referred to as a rod-shaped carbon fiber composite material 12-1. It does not exclude those using fiber materials other than carbon fiber.

The restraining material 3a can bind the carbon fiber bundle 2 so that the carbon fibers do not fall apart from the peripheral surface, and can stabilize the shape of the rod-shaped fiber reinforced composite material 12-1. In the present embodiment, in the rod-shaped fiber reinforced composite material 12-1, the carbon fiber bundle 2 is restrained by the restraining material 3a and a solidifying agent is applied thereto, so that the carbon fiber bundle 2 and the restraining material 3a are solidified. Is integrated by. It is preferable that the carbon fiber bundle 2 is twisted as in the rod-shaped fiber reinforced composite material 12.

In the rod-shaped fiber reinforced composite material 12-1 of the present embodiment, the braided fiber-reinforced composite material 3a is formed by winding the fiber serving as the restraining material 3a around the outer circumference of the carbon fiber bundle to assemble a tubular braid (rounding). Is forming. By forming the restraining material 3a into a braided shape, the carbon fiber bundle 2 can be bound and the shape of the obtained rod-shaped fiber reinforced composite material 12-1 can be made more stable, and the restraining material 3a is an internal carbon fiber. It functions as a protective layer that protects the carbon fibers that make up the bundle 2. In addition, since traditional Japanese braid technology is used, deterioration of appearance quality can be suppressed even when used in traditional buildings.

Therefore, when the rod-shaped fiber reinforced composite material 12-1 having such a structure is used as a seismic reinforcing material such as a tensile material, it exhibits stable strength, has good appearance quality, and comes into contact with sharp objects such as gravel. Can also be prevented from breaking.
Further, after dipping the carbon fiber bundle 2 restrained by the restraining material 3a into a resin (solidifying agent) solution, tension is applied in the length direction of the carbon fiber bundle 2 when handling with a die and squeezing excess resin. If the restraining material 3a has a braided structure, the diameter of the braid is reduced with the eyes closed, instead of opening the eyes like a knit. Therefore, it is possible to improve the adhesion between the restraining material 3a and the carbon fiber bundle 2 while suppressing the exposure of the carbon fiber bundle 2 inside, which is preferable from the viewpoint of the strength of the obtained seismic reinforcing material.

The restraining material 3a may be bound so that the carbon fibers constituting the carbon fiber bundle 2 do not come apart, and the arrangement of the restraining material 3a is not limited to the braided shape. Further, it is not necessary to completely cover the surface of the carbon fiber bundle 2 with the restraining material 3a, and a part of the surface of the carbon fiber bundle 2 may not be covered.
As an example of binding by another restraining material, one restraining material is spirally wound to bind the carbon fiber bundle (not shown), or as shown in FIG. 3, the peripheral surface of the carbon fiber bundle 2 The carbon fiber bundle 2 is bound by the braided string-shaped restraining material 3b in which the fibers to be the restraining material 3b are wound around and the coarse-meshed tubular circular knitting is knitted, or the fibers and the like are specified as shown in FIG. The carbon fiber bundle 2 may be bound by the restraining materials 3c arranged at intervals.
On the other hand, from the viewpoints of protecting the carbon fiber bundle 2, stabilizing the strength by stabilizing the shape of the rod-shaped fiber reinforced composite material 12-1, and suppressing the deterioration of the appearance quality, as shown in FIG. 5, the restraining material 3d is used. It is preferable to form a braid and cover the entire surface of the carbon fiber bundle 2.

The restraining materials 3a to 3d are preferably flexible, and are preferably synthetic fibers such as polyamide (nylon, etc.), vinylon, polyacrylic, polypropylene, vinyl chloride, aramid, cellulose, polyamide, polyester, polyacetal, and recycled fibers such as rayon. , Semi-synthetic fibers such as acetate, natural fibers such as silk, wool, linen and cotton can be used. Further, fibers having excellent thermal stability are preferable, glass fibers and basalt fibers are preferable, and glass fibers are particularly preferable. By using a fiber having excellent thermal stability such as glass fiber, it is excellent in nonflammability when heat is applied, and the occurrence of deviation between the carbon fiber bundle 2 and the restraint materials 3a to 3d is suppressed and stable. It can exhibit strength against tension and nonflammability.

In the fiber-reinforced composite material 12-1, in order to bind the carbon fiber bundles 2 more firmly, the carbon fiber bundles 2 bound by the restraint materials 3a to 3d are impregnated with a solidifying agent, and the restraint materials 3a to 3d are impregnated. It is preferable to cure the carbon fiber bundle 2 at the same time. By doing so, the carbon fiber bundle 2 and the restraint materials 3a to 3d can be firmly integrated.

The thickness of the rod-shaped fiber-reinforced composite material 12-1 is 1 to 25 mm in diameter, more preferably 1 to 10 mm, and even more preferably 1 to 5 mm, the rod-shaped fiber-reinforced composite material 12-1 and the rod-shaped material described later. The fiber-reinforced composite material 12-2 (strand structure or multi-strand structure) can be easily wound around the drum, and flexibility such as following an arbitrary shape can be enhanced. The diameter of the rod-shaped fiber-reinforced composite material 12-1 of the present embodiment is perpendicular to the length direction of the rod-shaped fiber-reinforced composite material 12-1 integrated with the carbon fiber bundle 2 and the restraining materials 3a to 3d by a solidifying agent. It is the diameter of the cross section cut into the above, and the diameter of the carbon fiber bundle 2 and the amount of the solidifying agent applied are selected so as to have the desired diameter. When the cross section of the rod-shaped fiber reinforced composite 12-1 is not circular when cut perpendicularly to the length direction, the major axis of the cross section is called the diameter.

Further, the rod-shaped fiber reinforced composite material 12-1 is provided with a separate layer (cylindrical body made of fiber material, resin layer, etc.) so as to cover the entire outer circumference of the carbon fiber bundle 2 to which the restraining materials 3a to 3d and the solidifying agent are applied. ) May be provided. From the viewpoint of improving nonflammability, it is preferable to provide a resin layer using a polyimide resin, a silicone resin, or a vinyl chloride resin. Further, from the viewpoint of designability, a resin layer containing a colorant such as a pigment for coloring may be separately provided. These resin layers can be used with either a thermoplastic resin or a thermosetting resin, but when a thermoplastic resin is used as the solidifying agent, the resin used for the separate layer is also a thermoplastic resin. preferable.

(Modification example 2 of rod-shaped fiber reinforced composite material)
The rod-shaped fiber reinforced composite material 12-2 of another embodiment of the present invention will be described. FIG. 6 is a diagram showing a second modification of the rod-shaped fiber reinforced composite material.
As the rod-shaped fiber reinforced composite material 12-2, one or both of the above-mentioned rod-shaped fiber reinforced composite material 12 and the rod-shaped fiber reinforced composite material 12-1 is used as a core wire, and a plurality of these are aligned or twisted together. It is a strand structure formed in the above.
For example, as shown in FIG. 6, the rod-shaped fiber-reinforced composite material 12-2 includes seven rod-shaped fiber-reinforced composite materials 12-1 described above, and one rod-shaped fiber-reinforced composite material 12 is arranged at the center. By forming -1 as a strand structure having a structure surrounded by the other six rod-shaped fiber-reinforced composite materials 12-1, the rod-shaped fiber-reinforced composite material 12- is used in joining the joint 11 and the rod-shaped fiber-reinforced composite material 12-2. The contact area and structural resistance between 2 and the adhesive are increased, the adhesive strength between the joint and the rod-shaped fiber reinforced composite 12-2 is improved, and the tensile strength and stability of the obtained seismic reinforcing material are improved. More preferable.

Examples of the core wire constituting the strand structure include the rod-shaped fiber reinforced composite material 12 and the rod-shaped fiber reinforced composite material 12-1, but the present invention is not limited to this, and any core wire having the structure of the rod-shaped fiber reinforced composite material of the present invention can be used. Any one may be used. Further, in the core wire of the present embodiment, the core wire constituting the core wire is the same core wire, but different core wires may be used in combination as long as the core wire satisfies the requirements of the core wire of the present invention.

The rod-shaped fiber reinforced composite material 12-2 according to the present embodiment has a strand structure in which the core wire as the core and the other six core wires surrounding the core wire as the core are twisted together. Even if the seven core wires are not integrated by using the above, it is possible to prevent the core wires from falling apart and integrate them. The rod-shaped fiber reinforced composite 12-2 can maintain excellent tensile strength even when it is stretched and used after the drum is further subjected to bending stress, or when it is used in a place where bending stress is applied.

Also, as the direction of forming the twist,
Any of carbon fiber bundle × strand structure = S direction × Z direction, S direction × S direction, Z direction × Z direction, and Z direction × S direction is possible.

The number of twists of the strand structure is selected at 1.1 to 50 times / m depending on the purpose. If the number of twists is too small, the core material tends to be separated. On the other hand, if the number of twists is too large, the tensile strength may decrease. When the number of core wires is 7 to 37, 1.5 to 20 times / m is preferable. More preferably, 2 to 10 times / m is preferable.

The number of core wires constituting the strand structure is 7, but is not limited to this, and is appropriately determined in consideration of the target performance (particularly breaking load) and application, and is not particularly limited. However, it is usually 2 to 50 pieces. Preferably, 7 to 37 pieces are preferable.
For example, in the case of a rod-shaped carbon fiber composite material 12 or a rod-shaped carbon fiber composite material 12-1 in which one 24,000 carbon fibers bundled (24k) is used as a carbon fiber bundle, the core wire constituting the strand structure When the number of fibers is about 2 to 50, it is suitable for use as a brace material or the like.

The rod-shaped fiber reinforced composite material 12-2 of the present embodiment is a rod-shaped carbon fiber composite material having a core so as to surround one rod-shaped carbon fiber composite material 12 or a rod-shaped carbon fiber composite material 12-1 used as a core wire. 12 or rod-shaped carbon fiber composite material 12-1 and other core wires are twisted together, but the structure of the strand structure is such that the core wire is not provided and the required number of core wires (for example, 2 to 50) is used. May be bundled and the entire bundled core wire may be twisted.

When the diameter of the rod-shaped fiber reinforced composite material 12-2 is 2 to 100 mm, more preferably 4 to 50 mm, and even more preferably 6 to 20 mm, the rod-shaped fiber reinforced composite material 12-2 can be easily wound around the drum. In addition, flexibility such as following an arbitrary shape can be enhanced.
The rod-shaped carbon fiber composite material 12-2 may be a multi-strand structure obtained by further twisting the strand structure.
Further, the rod-shaped fiber reinforced composite material 12-2 may be provided with a separate layer (a tubular body made of a fiber material, a resin layer, etc.) so as to cover the entire outer circumference of the strand structure or the multi-strand structure. ..
In the strand structure and the multi-strand structure, dust and the like are likely to adhere between the twisted core wires, and the adhesion of these dusts can be suppressed.
Further, from the viewpoint of improving nonflammability, it is preferable to provide a resin layer using a polyimide resin, a silicone resin, or a vinyl chloride resin as a separate layer so as to cover the entire surface.
Further, from the viewpoint of designability, a resin layer containing a colorant such as a pigment for coloring may be separately provided as a separate layer so as to cover the entire surface.
These resin layers can be used with either a thermoplastic resin or a thermosetting resin, but when a thermoplastic resin is used as the solidifying agent, the resin used for the separate layer is also a thermoplastic resin. preferable.

The rod-shaped fiber reinforced composite material 12 of the present embodiment having the above configuration is lightweight and has excellent strength, so that it is a traditional building or a conventional seismic retrofitting material built in a place where heavy machinery such as a crane car cannot enter. It is possible to perform seismic retrofitting of traditional buildings that could not withstand the mass of the crane and could not be retrofitted, and it is also possible to suppress deterioration of the appearance of traditional buildings because a thin seismic retrofitting material is used.

Although the embodiments of the present invention have been described above, these are examples of the present invention, and various configurations other than the above can be adopted within the scope of the technical idea of the present invention.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the following Examples unless the gist thereof is changed.
In addition, various data in this example were measured by the following methods.

<Diameter>
The diameters (outer diameter, inner diameter) of the rod-shaped fiber reinforced composite and the joint were measured with calipers.
<Mass>
The rod-shaped fiber reinforced composite material and the joint were cut to 10 cm, the mass was measured using an electronic balance, and the value was multiplied by 10 to obtain the mass per 1 m. In addition, the mass of the entire seismic retrofitting material obtained in the examples was also measured using a balance.
<Density>
The measurement was performed according to JIS K7112: 1999 A method (underwater substitution method).

<Tensile strength and breaking load>
The tensile strength and breaking load were measured under the condition of 2 mm / min using a 5980 floor type high capacity universal testing machine model 5985 supplied by Instron Japan Company Limited. The breaking load (kN) when the sample breaks is defined as the breaking load, and the breaking load is divided by the cross-sectional area (effective cross-sectional area) cut perpendicular to the length direction of the rod-shaped fiber reinforced composite material to obtain the tensile strength (MPa). And said. Since the thickness of the seismic retrofitting material differs depending on the location and the cross-sectional area differs depending on the location, only the breaking load was measured.
In addition, in order to measure the breaking load of the seismic reinforcing material, the part protruding from the joint of the rod-shaped fiber reinforced composite material connected to the joint was cut to a length of 22 cm, and a threaded steel pipe (length 20 cm). , Inner diameter 18 mm, outer diameter 27 mm), the end not connected to the joint of the rod-shaped fiber reinforced composite material was inserted, and joined to the steel pipe using a urethane-based adhesive. The length of the rod-shaped fiber reinforced composite material joined in the steel pipe was 20 cm.
The steel pipe and the bolt portion of the seismic retrofitting material described in Example 1 were grasped by the gripping portion of the testing machine, and the tensile strength and the breaking load were determined.

In addition, in order to measure the tensile strength and breaking load of the rod-shaped fiber reinforced composite material, steel pipes (length 20 cm, inner diameter 23 mm, outer diameter) threaded with urethane adhesive at both ends of the rod-shaped fiber reinforced composite material are used. It was joined with 31 mm). The length of the rod-shaped fiber reinforced composite material joined in the steel pipe was 20 cm at each end.
The steel pipe was grasped by the gripping portion of the testing machine, and the tensile strength and breaking load of the rod-shaped fiber reinforced composite material were determined.

(Example 1)
Three 24K carbon fiber bundles (PAN-based carbon fiber, manufactured by Toray Industries, Inc., T700SC) are bundled, and one that is twisted 10 times / m in the S direction is used as a carbon fiber bundle, and glass fiber is used as a restraining material. The entire surface around the carbon fiber bundle was restrained with glass fibers in a braided shape by 8 striking stones using a string making machine (24 striking machine).

next,
Polymerized thermoplastic epoxy resin (DENATITE XNR6850V, solid content 85% by mass, manufactured by Nagase ChemteX Corporation) 100 parts by mass,
Hardener (DENATITE XNH6850V, solid content 30% by mass, manufactured by Nagase ChemteX Corporation) 6.5 parts by mass,
Depping into a solution (viscosity 80 mPa · s) consisting of 10 parts by mass of methyl ethyl ketone (MEK), passing through a die to remove excess solution, and the cross-sectional shape when cut perpendicular to the length direction of the carbon fiber bundle The shape was adjusted so as to be circular, and a solidifying agent was applied to the restrained carbon fiber bundle. After that, by performing heat treatment (150 ° C., 20 minutes), the polymerized thermoplastic epoxy resin is polymerized, and the carbon fiber bundle, the restraining material, and the thermoplastic epoxy resin (solidifying agent) are integrated to form a rod-shaped fiber. A reinforced composite material was obtained.

The cross section of the obtained rod-shaped carbon fiber composite material of Example 1 was circular and had a diameter of 3 mm.
When the rod-shaped carbon fiber composite material was wound 3000 m on a drum having a diameter of 100 cm at room temperature, it could be wound smoothly without breaking. The obtained rod-shaped carbon fiber composite material was used as a core wire.

Next, using seven of the obtained core wires, one core wire is used in the center, and six core wires surround the core wire, and the core wires are twisted while heating at 120 ° C. to form a strand structure, which is a rod-shaped fiber reinforced composite material. Got
The obtained rod-shaped fiber reinforced composite material of Example 1 had a diameter of 9 mm, a density of 1.6 g / m ³ , and a mass of 80 g / m. The breaking load was 90 kN and the tensile strength was 1800 MPa (effective cross-sectional area 50 mm ² ).

Next, as a joint, glass fibers were arranged so that the fiber axis direction was the same as the length direction of the joint and was a hollow tubular body, and a tubular material composited with an unsaturated polyester resin was obtained. .. The tubular object had a hollow portion penetrating from one end to the other. The outer diameter of the joint is 27 mm, the inner diameter is 21 mm, the length is 26 cm, the density is 1.8 g / m ³ , and the mass is 460 g / m.

Next, a rod-shaped fiber reinforced composite material cut to a length of 8 m from one end is inserted into the hollow portion of the joint, and a screw M12 (outer diameter 12 mm, mass) having a length of 20 cm from the other end. A 700 g / m) bolt (steel material) was inserted, and these were joined with a urethane adhesive to obtain a seismic reinforcing material.
The portion of the rod-shaped fiber reinforced composite material inserted into the joint and joined with an adhesive was 15 cm. Also. The portion inserted into the bolt joint and joined with an adhesive was 11 cm.

When the total mass of the obtained seismic retrofitting material was measured, it was as light as 1.0 kg with a seismic retrofitting material of about 8 m. Even if 20 seismic retrofitting materials are transported together, the weight is 20 kg.
Further, the breaking load was 47 kN (the bolt portion was broken).
Further, the seismic retrofitting material 8 m made of only the rod-shaped steel material (steel bolt used in Example 1) having the same strength as the breaking load this time has a total mass of 5.6 kg or more. When 20 seismic retrofitting materials are transported together, the weight is 112 kg, which cannot be transported without heavy machinery.

Therefore, since the seismic retrofitting material of the present invention is lightweight and has excellent strength, many seismic retrofitting materials can be easily carried to the construction site and installed without using a heavy machine such as a crane. The load on the building is small, and it can be used for various traditional buildings. In addition, the seismic retrofitting material is thin, which suppresses changes in the image of traditional buildings and suppresses deterioration of design.

The seismic retrofitting material of the present invention is useful as a seismic retrofitting material for applying seismic retrofitting to buildings such as reinforced concrete buildings and wooden houses. In particular, the seismic retrofitting material of the present invention is suitable as it can impart sufficient seismic resistance while maintaining the aesthetic appearance of a traditional building.

2 Fiber bundle (carbon fiber bundle)
3a to 3d Restraint material 10 Seismic retrofitting material 11 Joint 11a Hollow part 12, 12-1, 12-2 Rod-shaped fiber reinforced composite material (rod-shaped carbon fiber composite material)

Claims (6)

A joint made of a fiber reinforced composite material , which is a tubular material having hollow portions at both ends , and a joint.
With the first rod-shaped fiber reinforced composite material inserted and joined into the hollow portion of one end of the joint ,
Having a metal material inserted and joined into the hollow portion of the other end of the joint .
Said first rod-like fiber-reinforced composite material, the strand structure by twisting the core wire comprising a fiber bundle which is integrated by the solidifying agent, or Ri multistrand structures der that twisting the strands structure,
The joint, the first rod-shaped fiber reinforced composite material, and the metal material are joined with an adhesive.
The adhesive is a urethane-based adhesive,
The solidifying agent is a thermoplastic epoxy resin,
The breaking load is 3 to 300 kN,
Total mass, 5 kg or less der Ru seismic reinforcements. Density of the joint, seismic reinforcement according to claim 1 which is 1.0 to 5.0 g / cm ^3. The seismic retrofitting material according to claim 1 or 2 , wherein the mass of the joint is 50 to 5000 g / m. The seismic retrofitting material according to any one of claims 1 to 3 , wherein the density of the first rod-shaped fiber reinforced composite material is 1.0 to 2.5 g / cm ³ . The seismic retrofitting material according to any one of claims 1 to 4 , wherein the mass of the first rod-shaped fiber reinforced composite material is 2 to 150 g / m. The seismic retrofitting material according to any one of claims 1 to 5 , wherein the tensile strength of the first rod-shaped fiber reinforced composite material is 100 to 5000 MPa.

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