JPWO2006088184A1 - Reinforcement material for construction structure, reinforced construction structure, and reinforcement method for construction structure - Google Patents

Abstract

The additional material layer 3, the insertion material layer 4, and the adhesive layer 5 are provided. The additional material layer 3 and the insertion material layer 4 are laminated via the adhesive layer 5, and the insertion is performed with respect to the rigidity of the additional material layer 3. A reinforcing material for a construction structure in which the rigidity ratio of the material layer 4 is 0.5 or less. A reinforced construction structure having such a reinforcing material, an adhesive layer 2 and a base material 1, wherein the insertion material layer 4 of the reinforcing material and the base material 1 are bonded via the adhesive layer 2. Reinforcement method for construction structure including at least one step selected from the group consisting of the following steps (I) to (III): (I) Bonding the insert material layer 4 to the base material 1 of the construction structure, Further, the step of adhering the additional material layer 3 to the insertion material layer 4, (II) the step of bonding the reinforcing material insertion material layer 4 according to claim 1 to the base material 1 of the construction structure, or ( III) A step of attaching the reinforcing material with the adhesive layer 2 according to claim 8 to the base material 1 of the construction structure.

Description

  The present invention mainly relates to a reinforcing material for a construction structure, a reinforced construction structure, and a reinforcing method for the construction structure.

  Structures made of construction materials such as concrete, steel, and wood lose their strength over time due to various causes such as corrosion, salt damage, temperature change, moisture, water pressure, load, etc., and eventually cracks, distortion, collapse , Resulting in defects such as collapse and rupture.

  At present, the main methods of reinforcing structures with reduced strength are welding methods, restraining construction materials with jigs such as high-strength bolts and attachment plates, and sheets on construction materials that require reinforcement. A method of adhering reinforcing materials in the form of plates, nets, or the like is used.

  However, the welding method and the method of constraining the construction material with a jig have the disadvantage that a special technique and a large scaffold are required. Welding is not suitable as a method for reinforcing concrete, stone, and wood.

  The method of bonding the reinforcing material is a simple and economical method because it does not require special technology or a large scaffold, but on the other hand, a high shear stress (peeling shear stress) is applied to the adhesion end of the adhesive layer. When it occurs, it has a problem that the additional material layer peels off.

  On the other hand, at present, sheets and plates made of carbon fiber, aramid fiber, glass fiber, steel fiber, steel, resin and the like are widely used as reinforcing materials.

  Currently, reinforcing materials having a single layer structure are mainly used, but several reinforcing materials having a laminated structure made of a plurality of materials have been reported (Patent Document 1, Non-Patent Document 1).

  For example, Patent Document 1 discloses a structure in which a predetermined number of unidirectional reinforcing fiber materials for concrete structure repair and reinforcement are laminated. However, Patent Document 1 does not suggest a structure that reduces the peeling shear stress at the adhesion end of the adhesive layer.

Non-Patent Document 1 describes a structure in which a plurality of carbon fiber sheets are laminated. However, in this structure, reduction of the peeling shear stress generated at the adhesion end of the adhesive layer is insufficient, and separation of the carbon fiber sheet occurs from the adhesion end of the adhesive layer (Non-Patent Document 1).
Japanese Patent Laid-Open No. 9-67943 Steel sheet stress reduction and peeling shear stress by carbon fiber sheet, Okura, Fukui, Nakamura, Matsukami, JSCE Proceedings No. 689 / I-57, 239-249, 2001.10.

  An object of the present invention is to provide a new reinforcing material that is difficult to peel off from a base material.

  As a result of intensive studies seeking a new reinforcing material that is difficult to peel off from the base material, the inventors have a structure in which an additional material layer and an insertion material layer are laminated via an adhesive layer. When the ratio of the rigidity of the insertion material layer to the rigidity of the additional material layer is 0.5 or less, the ratio of the rigidity of the insertion material layer to the rigidity of the additional material layer is larger than 0.5 when the insertion material layer is not stacked. As compared with the case, it has been found that the reinforcing material is difficult to peel off from the base material, and the present invention has been completed.

That is, the present invention relates to the following matters.
Item 1.
It has an additional material layer 3, an insertion material layer 4, and an adhesive layer 5,
The additional material layer 3 and the insertion material layer 4 are laminated via the adhesive layer 5, and
The ratio of the rigidity of the insertion material layer 4 to the rigidity of the additional material layer 3 is 0.5 or less.
Reinforcement material for construction structures.
Item 2.
Item 2. The reinforcing member for a construction structure according to Item 1, wherein the ratio of the rigidity of the insertion material layer 4 to the rigidity of the additional material layer 3 is 0.4 or less.
Item 3.
Item 2. The reinforcing member for a construction structure according to Item 1, wherein the ratio of the rigidity of the insertion material layer 4 to the rigidity of the additional material layer 3 is 0.3 or less.
Item 4.
Item 2. The reinforcing member for a construction structure according to Item 1, wherein the ratio of the rigidity of the insertion material layer 4 to the rigidity of the additional material layer 3 is 0.2 or less.
Item 5.
Item 2. The reinforcing material according to Item 1, wherein the additional material layer 3 is a carbon fiber plate or a carbon fiber sheet, and the insertion material layer 4 is a glass fiber sheet or an aramid fiber sheet.
Item 6.
Applying or impregnating an adhesive to the surface of the additive and / or insert,
A step of overlaying an additive and an insert applied with or impregnated with an adhesive, and
Curing the adhesive,
The manufacturing method of the reinforcing material of claim | item 1 including this.
Item 7.
Arranging the additional material and the insertion material through a predetermined gap;
Filling the gap with an adhesive, impregnating the additive and the insert with the adhesive, and
Item 2. The method for producing a reinforcing material according to Item 1, comprising a step of curing the adhesive.
Item 8.
A reinforcing material with an adhesive layer 2 of a construction structure, wherein the adhesive layer 2 is bonded to the reinforcing material insertion material layer 4 according to Item 1.
Item 9.
The reinforcing material according to Item 1, an adhesive layer 2, and a base material 1,
A reinforced construction structure in which a reinforcing material insertion material layer 4 and a base material 1 are bonded to each other through an adhesive layer 2.
Item 10.
A method for reinforcing a construction structure including at least one step selected from the group consisting of the following steps (I) to (III):
(I) a step of bonding the insertion material layer 4 to the base material 1 of the construction structure, and further bonding the additional material layer 3 to the insertion material layer 4;
(II) A step of bonding the reinforcing material insertion material layer 4 according to Item 1 to the base material 1 of the construction structure, or
(III) The process of sticking the reinforcement material with the adhesive layer 2 of claim | item 8 to the base material 1 of a construction structure.

  Item 11. The reinforcing material for a construction structure that satisfies the following formula when the reinforcing material according to Item 1 and the base material 1 are bonded together via the adhesive layer 2:

here,

σ ₀ is a stress generated in the base material 1 at a position where the additional material layer 3 is not bonded,
E ₁ is the Young's modulus of the base material 1,
t ₁ is the thickness of the base material 1 (however, t ₁ when the additional material is provided on both sides is the thickness of the base material 1 and t when the additional material is provided on one side) ₁ is the thickness of the base material 1 × 2),
E ₃ is the Young's modulus of the additional material layer 3,
t ₃ is the side thickness of the additional material layer 3,
E ₄ is the Young's modulus of the insert material layer 4,
t ₄ is the thickness of one side of the insertion material layer 4,
G ₂ is the shear elastic modulus of the adhesive layer 2,
h ₂ is the thickness of one side of the adhesive layer 2;
G ₅ is the shear elastic modulus of the adhesive layer 5,
h ₅ is a side thickness of the adhesive layer 5,
T ₂₁ represents the smaller value of the tensile shear bond strength at the interface between the adhesive layer 2 and the base material 1 and the tensile shear bond strength at the interface between the adhesive layer 2 and the insert material layer 4;
T ₅₁ represents the smaller value of the tensile shear bond strength at the interface between the adhesive layer 5 and the insertion material layer 4 and the tensile shear bond strength at the interface between the adhesive layer 5 and the additional material layer 3. .

  Hereinafter, the present invention will be described in more detail.

  The reinforcing material of the present invention is composed of an additional material, an insertion material, and an adhesive that bonds the additional material and the insertion material.

  The additive material is not particularly limited, but a material usually used for reinforcing a construction structure, for example, a woven fabric, a knitted fabric or a nonwoven fabric obtained by curing a fiber with a matrix polymer, or a fiber with a matrix polymer. A material dispersed in, a metal, or a resin is used, and in particular, a woven fabric, a knitted fabric, or a nonwoven fabric obtained by curing fibers with a matrix polymer can be suitably used.

  As the fibers, fibers such as inorganic fibers, organic fibers, and metal fibers can be suitably used. For example, carbon fibers (CF), glass fibers (GF), aramid fibers (ArF), polyarylate fibers, high-strength polyethylene fibers And a fiber selected from the group consisting of polyacetal fiber, alumina fiber (AF), silicon carbide fiber (SiCF), Tyranno fiber, boron fiber, amorphous metal fiber, stainless steel fiber, or a combination thereof. In particular, carbon fibers and aramid fibers are excellent in that they have high strength and high rigidity. If necessary, the fibers may be entangled with each other, bundled into a bundle, or twisted into a string.

  Fibers are produced by conventional methods. For example, carbon fibers can be produced by the following method: a spinning dope obtained by polymerizing acrylonitrile, a comonomer and a solvent in the presence of a catalyst is spun, washed with water, and post-treated to obtain a precursor. . The obtained precursor is usually flame-resistant in air at 200 to 350 ° C., then carbonized in an inert gas at 1000 to 1500 ° C., and further subjected to surface treatment and sizing treatment to obtain carbon fibers. it can. The glass fiber can be produced by the following method, which is slightly different between the short fiber and the long fiber: The short fiber glass fiber is obtained by melting molten glass into a large number of small holes (usually 0.5 to In a short fiber spinning device having a diameter of 0.7 mm, and centrifuged at a rotational speed of about 1000 rpm or more and blown off like a cotton candy. The long glass fiber can be produced mainly by a method (Direct Melt method) in which the molten glass is directly cooled to a bushing without pores in a long fiber spinning apparatus and is made into a fiber.

  In addition to this, regarding the method for producing various fibers, reference can be made to “Fiber Handbook 2nd Edition, edited by Textile Society, published on March 25, 1994”, which is incorporated herein in its entirety.

  Commercially available fibers can also be used. For example, Pyromex (Teijin Techno Products Co., Ltd.) as carbon fiber, Glass cloth (Unitika Glass Fiber Co., Ltd.) or Glass cloth (Kanebo Co., Ltd.) as glass fiber, Twaron, Technora, Conex (Teijin Techno Products Co., Ltd.) as aramid fiber Company) or KEVLAR (Toray DuPont Co., Ltd.) or the like can be suitably used.

  The woven fabric can be formed by a conventional method, for example, by inserting the warp yarns in parallel and alternately inserting the weft yarns. The knitted fabric can be formed by a conventional method, for example, by forming a loop of yarn with a knitting needle and passing the loop through an existing loop, and connecting the loops. The nonwoven fabric can be formed by a conventional method, for example, it can be formed by shrinking laminated fibers, entanglement with a needle punch, water punch, or the like, or by fusing the laminated fibers. You may shape | mold a woven fabric, a knitted fabric, or a nonwoven fabric by methods other than these. For the method for producing a woven fabric, a knitted fabric or a non-woven fabric, reference can be made to “Fiber Handbook 2nd Edition, edited by Textile Society, published on March 25, 1994”, which is incorporated herein in its entirety.

  The matrix polymer is not particularly limited, but for example, epoxy resin, unsaturated polyester resin, phenol resin, vinyl ester resin, polyimide resin, polyamide resin, polycarbonate resin, polypropylene resin, polybutylene terephthalate resin, polyphenylene sulfide resin, polyphenylene sulfide resin Ethersulfone resins, polyetheretherketone resins, polyamideimide resins and the like can be used. In particular, an epoxy resin excellent in moldability and heat resistance is preferable. A curing agent, a curing accelerator, a diluent and the like are added to the matrix polymer as necessary.

  The additive material is formed by applying or impregnating a matrix polymer to a fiber woven fabric, knitted fabric or non-woven fabric and curing the matrix polymer, or mixing the matrix polymer together with the fiber to form a woven fabric, knitted fabric or non-woven fabric. It can be obtained by curing the matrix polymer.

  In the case where a material in which fibers are dispersed in a matrix polymer is used as the additional material, for example, a material in which the above fibers are dispersed in the above matrix polymer by a conventional method can be used. Refer to “Fiber Handbook 2nd edition, edited by Textile Society, published on March 25, 1994” for the manufacturing method of the fiber dispersed in the matrix polymer as an additive. be able to.

  When a metal or a resin is used as the additional material, as the metal, for example, steel, stainless steel, or a resin obtained by curing the above-described matrix polymer can be suitably used.

  The shape of the additional material is not particularly limited. For example, a film (having a thickness of less than 0.05 mm), a sheet (having a thickness of 0.05 mm or more and less than 1 mm), a plate (having a thickness of 1 mm or more). Preferably a sheet or plate.

  In a preferred embodiment of the present invention, the additional material is a carbon fiber plate, a carbon fiber sheet, an aramid fiber plate, or an aramid fiber sheet.

  Commercially available fiber products, for example, carbon fiber tow plate (Nittetsu Composite Co., Ltd.) or trading card laminate (Toray Industries, Inc.) as carbon fiber plate, carbon fiber tow sheet (Nittetsu Composite Co., Ltd.), trading card cloth as carbon fiber sheet (Toray Industries, Inc.), Reperaque (Mitsubishi Chemical Industrial Co., Ltd.) or TU Cross (Shin Nippon Oil Co., Ltd.), aramid fiber tow plate (manufactured by Nippon Steel Composite) as an aramid fiber plate, aramid fiber tow sheet as an aramid fiber sheet (Nippon Steel Composite Co., Ltd.) or Fibula Sheet (Fivex Co., Ltd.) can also be suitably used as the additional material.

  The additional material layer may be formed by laminating a plurality of additional materials via an adhesive. At this time, the kind and shape of each additional material may be the same or different. Moreover, it does not specifically limit as an adhesive agent used for adhesion | attachment of additional materials, However, The adhesive agent used for adhesion | attachment of the additional material and insertion material mentioned later can be used conveniently.

  The insertion material is not particularly limited, but a material usually used in the field of construction structures, for example, a woven fabric, a knitted fabric, or a nonwoven fabric obtained by curing a fiber with a matrix polymer, and a fiber with a matrix polymer. A material dispersed in, a metal, or a resin is used, and in particular, a woven fabric, a knitted fabric, or a nonwoven fabric obtained by curing fibers with a matrix polymer can be suitably used.

  As specific examples of fibers, fibers such as inorganic fibers, organic fibers, and metal fibers are preferably used. For example, carbon fibers (CF), glass fibers (GF), aramid fibers (ArF), polyarylate fibers, high strength Examples thereof include fibers selected from the group consisting of polyethylene fibers, polyacetal fibers, alumina fibers (AF), silicon carbide fibers (SiCF), Tyranno fibers, boron fibers, amorphous metal fibers, stainless steel fibers, or combinations thereof. If necessary, the fibers may be entangled with each other, bundled into a bundle, or twisted into a string.

  The fiber is produced by the method described above. When using a commercial item, the above-mentioned commercially available fiber can be used.

  A woven fabric, a knitted fabric, or a non-woven fabric can be formed by the method described above.

  The matrix polymer is not particularly limited, but for example, epoxy resin, unsaturated polyester resin, phenol resin, vinyl ester resin, polyimide resin, polyamide resin, polycarbonate resin, polypropylene resin, polybutylene terephthalate resin, polyphenylene sulfide resin, polyphenylene sulfide resin Ethersulfone resins, polyetheretherketone resins, polyamideimide resins and the like can be used. In particular, an epoxy resin excellent in moldability and heat resistance is preferable. A curing agent, a curing accelerator, a diluent and the like are added to the matrix polymer as necessary.

  The insert material is formed by applying or impregnating a matrix polymer to a fiber woven fabric, knitted fabric or non-woven fabric and curing the matrix polymer, or mixing the matrix polymer together with the fiber to form a woven fabric, knitted fabric or non-woven fabric. It can be obtained by curing the matrix polymer.

  When using a material in which fibers are dispersed in a matrix polymer as an insert, for example, a material in which the above-described fibers are dispersed in the above-described matrix polymer by a conventional method can be used.

  In the case of using a metal or a resin as the insertion material, as the metal, for example, a steel or stainless steel resin obtained by curing the above-described matrix polymer can be suitably used.

  The shape of the insert is not particularly limited. For example, a film (having a thickness of less than 0.05 mm), a sheet (having a thickness of 0.05 mm or more and less than 1 mm), a plate (having a thickness of 1 mm or more). Preferably a film or sheet.

  In a preferred embodiment of the present invention, the insert is a glass fiber sheet, glass fiber film, aramid fiber sheet, or aramid fiber film.

  Commercially available fiber products, for example, glass fiber tow sheet (manufactured by Nippon Steel Composite Co., Ltd.) as a glass fiber sheet, aramid fiber tow sheet (manufactured by Nippon Steel Composite Co., Ltd.) or fibra sheet (Fivex Co., Ltd.), etc. as an aramid fiber sheet Can also be used as an insert.

  The insert material layer may be formed by laminating a plurality of insert materials via an adhesive. At this time, the type and shape of each insert may be the same or different. Moreover, it does not specifically limit as an adhesive agent used for adhesion | attachment of insertion materials, However, The adhesive agent used for adhesion | attachment of the additional material and insertion material mentioned later is illustrated suitably.

  The rigidity of the insertion material layer 4 is about 0.5 times or less, preferably about 0.4 times or less, more preferably about 0.3 times or less, more preferably about 0.2 times or less than the rigidity of the additional material layer 3. It is. In other words, the ratio of the rigidity of the insertion material layer 4 to the rigidity of the additional material layer 3 is about 0.5 or less, preferably about 0.4 or less, more preferably about 0.3 or less, and further preferably about 0.2. It is as follows.

  By inserting the insert material layer 4 having such a rigidity in the range between the additional material layer 3 and the base material 1, the insert material layer 4 having no such rigidity in the range is added to the additional material layer 3. Compared to the case where it is present between the base material 1 or the case where the insert material layer 4 is not present, the reinforcing material is less likely to be peeled off from the base material, and the base material is reinforced for a longer or larger peeling load. Can do.

  When the insertion material layer 4 is formed by laminating a plurality of insertion materials via an adhesive, the rigidity of the entire laminate of the insertion materials is defined as the rigidity of the insertion material layer 4. In addition, when the additional material layer 3 is formed by laminating a plurality of additional materials via an adhesive, the rigidity of the entire layer of the additional material is defined as the rigidity of the additional material layer 3.

  Further, when the insert material layer 4 is a laminate of a plurality of insert materials via an adhesive, and / or the additive material layer 3 is laminated of a plurality of additive materials via an adhesive. In this case, an adhesive layer between the additional material closest to the insertion material layer 4 and the insertion material closest to the additional material layer 3 is referred to as an adhesive layer 5.

  Further, in the present invention, by inserting the insert material layer 4 having the rigidity in the above-described range between the additional material layer 3 and the base material 1, compared to the case where the insert material layer 4 is not interposed, Since the additional material layer 3 having higher rigidity can be used, the base material can be reinforced more firmly.

  As a combination of shapes of the additional material and the insertion material, preferably, when the insertion material is a film, the additional material is a sheet or a plate, and when the insertion material is a sheet, the additional material is a sheet or a plate, When the insert is a plate, the additional material is a plate. In other words, as a combination of shapes of the additional material and the insertion material, preferably, when the additional material is a plate, the insertion material is a plate, a sheet, or a film, and when the additional material is a sheet, the insertion material is It is a sheet or a film.

  As a combination of the fiber material of the additional material and the insertion material, preferably, when the insertion material is a glass fiber or an aramid fiber, the additional material is a carbon fiber.

  Examples of preferred combinations of the additive and insert used in the present invention are shown in Table 1 below.

  The reinforcing material of the present invention is obtained by adhering the above-mentioned additional material and insertion material with an adhesive.

  Although it does not specifically limit as an adhesive agent used for adhesion | attachment with an additional material and an insertion material, and forms the adhesive bond layer 5, It has a synthetic resin or a natural resin as a main component, This also has a hardening | curing agent, a hardening accelerator, and a diluent. Adhesives appropriately mixed with plasticizers, fillers and the like can be preferably used. As the main resin, a curable or plastic resin such as an epoxy resin, a urethane resin, an acrylic (acid) resin, a silicon resin, a vinyl acetate resin, or a vinyl acetate copolymer resin can be used. An acrylic resin and a urethane resin can be preferably used. The adhesive is preferably cured within a few days at a temperature of about 5 ° C. to about 45 ° C. in terms of ease of handling during production and construction. Such an adhesive is also used in an amount that provides an adhesive layer of the desired thickness. It is desirable to determine the amount of the adhesive after confirming how much adhesive is applied per unit area by using a test piece to obtain a desired thickness of the adhesive layer after curing.

  As an example of an epoxy resin, the polymer obtained by making low molecular weight diglycidyl ether of bisphenol A and diamine react, or the polymer obtained by oxidizing an olefin with peracetic acid is mentioned. Examples of acrylic (acid) resins include polymers of acrylic acid esters (eg, ethyl acrylate, methyl acrylate, butyl acrylate, 2-ethylhexyl acrylate). Examples of the urethane resin include a polymer mainly composed of a urethane bond obtained by reacting diisocyanate and diol.

  Adhesion between the additional material and the insertion material is a conventional method, for example, a method in which the additional material is superimposed on the applied insertion material impregnated or applied, and the adhesive is cured, and the aforementioned adhesive is impregnated. Alternatively, the insertion material is superimposed on the applied additional material and the adhesive is cured, or the additional material and the insertion material are fixed in advance through a predetermined gap, and then the gap between the additional material and the insertion material is set. It can be performed by a method of filling the adhesive and curing the adhesive. In addition, when using an adhesive that is cured by changing the physical properties due to heat such as thermosetting resin or UV irradiation resin, UV, etc., the adhesive is blown with warm air or irradiated with UV as necessary. Etc. are applied. Furthermore, you may perform defoaming, ventilation drying, etc. Regarding the adhesive and the bonding technique, reference can be made to “Adhesion Handbook (Third Edition), edited by the Japan Adhesive Society, published on June 28, 1996”, which is incorporated herein in its entirety.

  The reinforcing material of the present invention is further subjected to a coating treatment as necessary. Coating agents used in the coating process include light (UV, visible light) blocking agents, fungicides, algae inhibitors, rust inhibitors, flame retardants, pigments, colorants, dyes, brighteners, water-resistant substances, etc. Examples thereof include a resin containing a substance that improves the surface properties (for example, a resin usually used for a coating agent such as an acrylic resin, a urethane resin, a silicon resin, and a fluorine resin), and glass. The coating can be performed by applying a coating agent to the surface of the reinforcing material by a conventional method such as spraying, roller coating, brush coating or the like.

  In this way, the structure of the present invention having a structure in which the additional material layer 3 and the insertion material layer 4 are laminated via the adhesive layer 5 is obtained. The structure of the present invention may have a structure in which the additional material layer 3 and the insertion material layer 4 are laminated with the adhesive layer 5 interposed therebetween, or may have the entire structure.

  The reinforcing material of the present invention is bonded to the base material 1 for which reinforcement is desired. At this time, the reinforcing material may be bonded to the entire base material 1 or may be bonded to a part of the base material 1.

  Adhesion between the reinforcing material of the present invention and the base material 1 is performed by adhering the insertion material layer 4 of the reinforcing material and the base material 1 with an appropriate adhesive. Adhesion between the reinforcing material and the base material 1 is a conventional method, for example, a method in which the reinforcing material is superposed on the base material 1 impregnated or applied with an adhesive, and the adhesive is cured, or impregnated with or applied with an adhesive. The reinforcing material is superimposed on the base material 1 and the adhesive is cured, or the reinforcing material insertion material layer 4 is fixed to the base material 1 through a predetermined gap in advance, and then the base material 1 and It can be carried out by a method of filling an adhesive in the gap with the insertion material layer 4 and curing the adhesive. After bonding, pressure bonding, light (UV, visible light) irradiation, defoaming, finishing treatment (surface coating, etc.), air drying, and the like may be performed as necessary.

  Although it does not specifically limit as an adhesive agent used for adhesion | attachment of the insertion material layer 4 of the reinforcement material of this invention and the base material 1, and forms the adhesive bond layer 2, For example, adhesion | attachment with the above-mentioned additional material and insertion material The adhesive used for is illustrated. The adhesive used for bonding the reinforcing material and the base material 1 can be appropriately selected depending on the type of the base material 1, the type of the insertion material, the environmental conditions, and the like. For example, when the base material 1 is concrete, an epoxy resin, an acrylic (acid) resin, a vinyl acetate resin, a vinyl acetate copolymer resin, and an ethylene vinyl acetate resin can be suitably used as the adhesive. It is not limited to. When the base material 1 is steel, an epoxy resin, a urethane resin, an acrylic (acid) resin, a vinyl acetate copolymer resin, and an ethylene vinyl acetate resin can be suitably used as the adhesive, but are not limited thereto. . Epoxy resins have advantages such as high adhesive strength, toughness, high chemical resistance, and excellent dimensional stability. In addition, epoxy resins can be prepared from low-viscosity liquid products to high-viscosity putty-like products. It is also excellent in that it can be applied to a base material made of a material. The acrylic resin has advantages such as light weight, toughness, high weather resistance, and high light resistance, and is excellent in that it can be prepared into an aqueous emulsion that is easy to handle. The adhesive is preferably cured within a few days at a temperature of about 5 ° C. to about 45 ° C. in terms of ease of handling during production and construction. Regarding the adhesive and the bonding technique, reference can be made to “Adhesion Handbook (Third Edition), edited by the Japan Adhesive Society, published on June 28, 1996”, which is incorporated herein in its entirety.

The combination of the adhesive layer 2 and the adhesive layer 5 is selected according to the value of the dimensionless parameter D regarding the adhesive layer 2 and the adhesive layer 5. The dimensionless parameter D can actually range from about 0.5 to 4.0, but since the adhesive layer 2 and the adhesive layer 5 having the same physical properties and thickness are preferably used, Often about 0.7 to 1.4, more often 0.9 to 1.1, often about 1.0. Here, D = h ₅ G ₂ / (h ₂ G ₅ ), G ₂ is the shear elastic modulus of the adhesive layer 2, h ₂ is the thickness of one side of the adhesive layer 2, and G ₅ is the adhesive layer 5. , H ₅ is the thickness of one side of the adhesive layer 5.

  The base material 1 is not particularly limited as long as it is a substance used in a construction structure. Examples thereof include concrete, steel, aluminum, wood, stone, mortar, brick, and tile, and particularly preferably concrete and steel. is there.

  The construction structure to which the present invention is applied includes all building facilities and civil engineering facilities that require reinforcement, units thereof, and members thereof. For example, a bridge (river, sea surface, lake surface, valley, road, Structures that cross three-dimensionally with railways, etc., or their units or members (for example, bridge boards, piers, bridge columns, bridges, bridge decks, abutments, bridge piles, bridge towers), tunnels (hillsides, riverbeds, seabeds, Lake passages, underground passages) or units or members thereof (eg inner walls, entrance walls), buildings (roofs and pillars or structures with walls) (eg buildings, high-rise buildings, houses, barns) Or those units or members (posts, beams, roofs, outer walls, inner walls, floors, ceilings, fences, etc.), roads, wells, dams, chimneys, towers, statues, monuments, signs, gates, fences, embankments or These units or components are included , But it is not limited to these.

  The present invention also relates to a method for manufacturing a reinforcing material.

  Specifically, the present invention includes a step of applying or impregnating an adhesive to the surface of the additional material and / or the insertion material, and a step of superposing the additional material and the insertion material applied or impregnated with the adhesive. And the manufacturing method of the reinforcing material including the process of hardening an adhesive agent is provided.

  The present invention includes, as another manufacturing method, a step of arranging an additional material and an insertion material through a predetermined gap, a step of filling the gap with an adhesive, and impregnating the additional material and the insertion material with an adhesive, and an adhesion A method for producing a reinforcing material including a step of curing an agent is provided. Here, in the case where a plurality of additional materials are used, in the arranging step, those obtained by adhering the additional materials in advance may be arranged, or each additional material may be arranged via a predetermined gap. Good. In the case where a plurality of inserts are used, in the placement step, inserts bonded in advance may be placed, or each insert may be placed through a predetermined gap.

  The present invention further relates to a reinforcing material with an adhesive layer 2.

  The reinforcing material with the adhesive layer 2 of the present invention can be manufactured by impregnating or applying the adhesive to the inserting material layer 4 of the reinforcing material of the present invention, and the adhesive layer 2 is laminated on the inserting material layer 4. It has a structure. The reinforcing material with the adhesive layer 2 of the present invention may further have a release material that can be peeled off on the surface of the adhesive layer 2. The release material (for example, the release film or sheet) is a temporary support until the reinforcing material with the adhesive layer 2 is used, and prevents the adhesive layer 2 from drying and soiling, and maintains the adhesiveness. Fulfill. The release material is not particularly limited as long as it can be peeled off. For example, release paper (for example, paper subjected to resin lamination) can be used.

  It does not specifically limit as an adhesive agent used for the reinforcing material with the adhesive bond layer 2, The adhesive agent used for adhesion | attachment of the insertion material layer 4 of said reinforcing material and the base material 1 is illustrated. Since the reinforcing material with the adhesive layer 2 is highly likely to be stored for a long time in a state where the adhesive layer 2 is sealed with a release material, it has excellent long-term shape stability and can be used to withstand such long-term storage. High resistance to the material is desirable. From the viewpoint of workability during construction, an adhesive that cures within a few days at a temperature of about 5 ° C. to about 45 ° C. is preferable.

  The present invention further relates to a reinforced construction structure having the reinforcing material of the present invention.

  The reinforced construction structure of the present invention has a reinforcing material, an adhesive layer 2 and a base material 1, and an insertion material layer 4 of the reinforcing material is bonded to the base material 1 via the adhesive 2 (integrated). And the above-mentioned construction structure having a structure.

  The present invention further provides a method for reinforcing a construction structure. The reinforcing method of the present invention includes (I) a step of adhering the insert material layer 4 to the base material 1 of the construction structure, and further adhering the additional material layer 3 to the insert material layer 4; From the step of adhering the reinforcing material insertion material layer 4 of the present invention to the base material 1, or (III) the step of applying the reinforcing material with the adhesive layer 2 of the present invention to the base material 1 of the construction structure. At least one step selected from the group consisting of:

  In one preferable embodiment of the present invention, the reinforcing material generally has a structure in which the additional material layer 3 and the insertion material layer 4 are laminated via the adhesive layer 5. 2 (a) and 2 (b) are schematic side views of such a reinforcing material and a reinforced construction structure including such a reinforcing material.

  In one preferred embodiment of the present invention, the reinforcing material partially has a structure in which the additional material layer 3 and the insertion material layer 4 are laminated via the adhesive layer 5. FIGS. 11A to 11E are schematic side views of such a reinforcing material and a reinforced construction structure including such a reinforcing material.

  In one preferred embodiment of the present invention, the reinforcing material is bonded to one side of the base material 1. FIG. 2B is a schematic side view when a reinforcing material is bonded to one side of the base material 1.

  In one preferred embodiment of the present invention, the reinforcing material is bonded to both sides of the base material 1. FIG. 2C is a schematic side view when the reinforcing material is bonded to both surfaces of the base material 1.

  In one preferable embodiment of the present invention, the reinforcing material has a structure in which the additional material layer 3 and the insertion material layer 4 are laminated via the adhesive layer 5 only at the end portion or at the end portion and the necessary portion. Have. By using the insertion material only at the end of the adhesive layer that is susceptible to peeling shear stress, or only at the end and the necessary portion, the base material 1 can be efficiently reinforced with a smaller amount of insertion material.

  In one preferable embodiment of the present invention, the area of the laminated surface of the insertion material layer 4 is slightly larger than the area of the laminated surface of the additional material layer 3. FIG. 10 shows a schematic side view of the reinforced construction structure of the present invention when the area of the laminated surface of the insertion material layer 4 is slightly larger than the area of the laminated surface of the additional material layer 3.

  In a preferred embodiment of the present invention, the reinforcing material in the present invention satisfies the formula [21] and the formula [22] described later.

  Expressions [21] and [22] are obtained as follows.

  First, FIG. 3 shows the balance of forces generated in each layer of the reinforced construction structure of the present invention. From this balance of forces, a fourth-order differential equation expressed by the following equation [1] is obtained.

here,

here,
σ ₀ is a stress generated in the base material 1 at a position where the additional material layer 3 is not bonded,
σ ₁ is the stress generated in the base material 1 at the position where the additional material layer 3 is bonded,
E ₁ is the Young's modulus of the base material 1,
t ₁ is the thickness of the base material 1 (however, t ₁ when the additional material is provided on both sides is the thickness of the base material 1 and t when the additional material is provided on one side) ₁ is the thickness of the base material 1 × 2),
E ₃ is the Young's modulus of the additional material layer 3,
t ₃ is the side thickness of the additional material layer 3,
E ₄ is the Young's modulus of the insert material layer 4,
t ₄ is the thickness of one side of the insertion material layer 4,
G ₂ is the shear elastic modulus of the adhesive layer 2,
h ₂ is the thickness of one side of the adhesive layer 2;
G ₅ is the shear elastic modulus of the adhesive layer 5,
h ₅ is a side thickness of the adhesive layer 5,
x is a coordinate in the horizontal direction with the center of the additional material layer 3 as the origin.

  Here, each shear elastic modulus G and each Young's modulus E can be obtained as follows, for example. Between the shear elastic modulus G and the Young's modulus E, there is a relationship represented by the following formula.

Here, μ is a Poisson's ratio.

  The shear elastic modulus G is given by Young's modulus E and Poisson's ratio μ from the above equation. The Young's modulus E and Poisson's ratio μ can be obtained by a tensile test of the material.

  For example, the Young's modulus E and Poisson's ratio μ of a metal material can be determined according to the standard of JIS Z 2241 “Metal material tensile test method”. The Young's modulus E and Poisson's ratio μ of the carbon fiber plate can be determined according to the standard of JIS K 7073 “Tensile test method for carbon fiber reinforced plastic”. The Young's modulus E and Poisson's ratio μ of the plastic can be determined according to the standard of JIS K 7113 “Plastic tensile test method”. For concrete materials, there is no JIS for obtaining Young's modulus, but in the design, the slope of the line connecting the 1/3 point of the compressive strength obtained from the standard of JIS A 1108 “Compressive strength test method for concrete” and the origin. Is regarded as Young's modulus. The design uses about 0.17 for the Poisson's ratio.

The additional material layer 3 having a thickness of t _3, the thickness t ₄ of the insert material layer 4, the thickness h ₂ and h ₅ of the adhesive layer, for example, vernier caliper, a micrometer, a laser displacement sensor, microscope, etc. It is measured by a conventional method using a measuring instrument. The thickness t _{1 of the} base material is measured by a conventional method using a measuring instrument such as a caliper, a convex, a tape measure, or a surveying rope. In addition, in the case of using a commercially available additive or insert, the Young's modulus and thickness are often described in catalogs and instructions, and these values can also be used.

By solving the equation [1], the shear stress τ ₂ generated in the adhesive layer 2 and the shear stress τ 5 generated in the adhesive layer ₅ are respectively given by the following equations.

here,

By substituting L (L is the half length of the additional material layer 3) for x in the equations [9] and [10], the peeling shear stress τ ₂₁ generated at the adhesion end of the adhesive layer 2 And the peeling shear stress τ ₅₁ generated at the sticking edge of the adhesive layer 5 is given by the following equations:

Here, when c ₂ L is larger than 3, tanh (c ₂ L) is almost 1, so that the equations [15] and [16] are respectively the following equations.

When the peeling shear stress τ ₂₁ of the adhesive layer 2 and the peeling shear stress τ ₅₁ of the adhesive layer 5 satisfy the following expressions, peeling of the additional material layer 3 or the reinforcing material can be prevented.

here,
T ₂₁ represents the smaller value of the tensile shear bond strength at the interface between the adhesive layer 2 and the base material 1 and the tensile shear bond strength at the interface between the adhesive layer 2 and the insert material layer 4;
T ₅₁ represents the smaller value of the tensile shear bond strength at the interface between the adhesive layer 5 and the insertion material layer 4 and the tensile shear bond strength at the interface between the adhesive layer 5 and the additional material layer 3. .

  The tensile shear bond strength is determined by the material properties of the adhesive and the surface condition of the material to be bonded, and can be generally measured by JIS K 6850 “Test method for tensile shear bond strength of adhesive”.

  When the equations [19] and [20] are modified, the following equations are obtained.

here,

  On the other hand, the condition for preventing the peeling of the additional material layer 3 or the reinforcing material by the conventional method is given by Non-Patent Document 1 by the following equation.

here,
τ ₂₀ is a peeling shear stress generated at the adhesion end of the adhesive layer 2 when no insertion material is inserted in the conventional method, and T ₂₀ is an interface between the adhesive layer 2 and the base material 1 in the conventional method. Of the tensile shear bond strength and the tensile shear bond strength at the interface between the adhesive layer 2 and the additional material layer 3, the smaller value is represented.

  Equation [25] is modified to obtain the following equation.

here,

In the invention method, in order for the reinforcing material not to peel off from the base material, the equations [21] and [22] must be satisfied. Expressions [21] and [22] are represented by dimensionless quantities E ₄ t ₄ / (E ₃ t ₃ ), E ₃ t ₃ / (E ₁ t ₁ ), D, K ₂₁ , and K ₅₁ . Here, E ₄ t ₄ / (E ₃ t ₃ ) represents the ratio of the rigidity of the insert to the rigidity of the additional material, and E ₃ t ₃ / (E ₁ t ₁ ) represents the rigidity of the additional material relative to the rigidity of the base material. Represents the ratio.

When the tensile shear bond strengths T ₂₁ and T ₅₁ are equal, K ₂₁ and K ₅₁ are equal. However, K ₂₁ and K ₅₁ take various values depending on the magnitude of the stress σ ₀ generated in the base material 1.

As an example, assuming that D = 1, E ₄ t ₄ / (E ₃ t ₃ ) and E ₃ satisfying the equation [21] for each case of K ₂₁ = 0.36, 0.42, 0.48 The region of t ₃ / (E ₁ t ₁ ) is shown in FIG. For each value of K _21, under each curve (solid line) is a region satisfying the equation (21). Since the equation [22] always holds for each case of K ₅₁ = 0.36, 0.42, and 0.48, E ₄ t ₄ / (E ₃ derived from the equation [22] The regions of t ₃ ) and E ₃ t ₃ / (E ₁ t ₁ ) are not shown in the figure.

On the other hand, in the conventional method, the formula [26] must be satisfied so that the reinforcing material does not peel off from the base material. Formula [26] is expressed by dimensionless quantities E ₃ t ₃ / (E ₁ t ₁ ) and K ₂₀ . FIG. 4 shows a region of E ₃ t ₃ / (E ₁ t ₁ ) that satisfies the equation [26] for each case of K ₂₀ = 0.36, 0.42, 0.48. For each value of K ₂₀ , the left side of each straight line (broken line) is a region that satisfies the equation [26].

In FIG. 4, the curve given by Equation [21] for K ₂₁ = 0.36 intersects with the straight line given by Equation [26] for K ₂₀ = 0.36 at point A. Similarly, the curve given by Equation [21] for K ₂₁ = 0.42 intersects with the straight line given by Equation [26] for K ₂₀ = 0.42 at point B. Further, the curve given by equation [21] for K ₂₁ = 0.48 intersects the straight line given by equation [26] for K ₂₀ = 0.48 at point C.

In FIG. 5, the invention method and the conventional method are compared by taking the case of K ₂₁ = K ₂₀ = 0.36 as an example. FIG. 5 shows a region where the equation [21] is satisfied for K ₂₁ = 0.36 and a region where the equation [26] is satisfied for K ₂₀ = 0.36. The lower region of the curve I, that is, the region of [R1] and [R2] is a region that satisfies the formula [21]. The region on the left side of the straight line II, that is, the region of [R1] and [R3] is a region that satisfies the equation [26]. This shows the following. When E ₃ t ₃ / (E ₁ t ₁ ) is small, that is, when the rigidity of the additional material is small relative to the rigidity of the base material, the reinforcing material is not peeled off from the base material in both the conventional method and the inventive method. However, if E ₃ t ₃ / (E ₁ t ₁ ) increases, that is, if the rigidity of the additional material increases with respect to the rigidity of the base material, peeling of the reinforcing material from the base material should be prevented unless it is an invention method. I can't.

Therefore, the invention construction method uses the insertion material having the rigidity E ₄ t ₄ so that the value of E ₄ t ₄ / (E ₃ t ₃ ) is lower than the intersection point A, whereby the rigidity E ₃ t ₃ of the additional material is obtained. Can be made larger than that of the conventional method.

In FIG. 4, the curve (dotted line) passing through the intersections A, B, and C is the curve given by the formula [21] and the straight line given by the formula [26] for an arbitrary value of K ₂₁ = K ₂₀ . This is a series of intersections, and is given by the following equation by equalizing the left side of equation [21] and the left side of equation [26].

The curves passing through the intersections A, B and C in FIG. 4 are the result for D = 1. D defined by the formula [5] is the shear elastic modulus G _{2 of} the adhesive layer 2, the one-side thickness h _{2 of} the adhesive layer ₂ , the shear elastic modulus G _{5 of} the adhesive layer 5, and the adhesive layer 5. It is a dimensionless quantity with the one-side thickness h ₅ as a variable. Depending on the combination of the values of these variables, D can take various values in the range of 0.5-4. As a specific example, the curve of formula [28] is shown in FIG. 6 for each case of D = 0.5, 1, 2, and 4.

From FIG. 6, the following preferable relationship between D and E ₄ t ₄ / (E ₃ t ₃ ) is obtained for E ₃ t ₃ / (E ₁ t ₁ ) = 0.05 to 0.5. Is:
When D is 0.5, E ₄ t ₄ / (E ₃ t ₃ ) is preferably 0.3 or less, more preferably 0.2 or less,
When D is more than 0.5 and 1.0 or less, E ₄ t ₄ / (E ₃ t ₃ ) is preferably 0.4 or less, more preferably 0.3 or less,
When D is greater than 1.0 and less than or equal to 2.0, E ₄ t ₄ / (E ₃ t ₃ ) is preferably 0.5 or less, more preferably 0.4 or less.
When D is larger than 2.0 and 4.0 or less, E ₄ t ₄ / (E ₃ t ₃ ) is preferably 0.6 or less, more preferably 0.5 or less.

By satisfying such a relationship of D value and E ₄ t ₄ / (E ₃ t ₃ ), the reinforcing material of the present invention can be used when the reinforcing material does not have the insertion material layer 4 or when the D value and E ₄ Compared with the case where t ₄ / (E ₃ t ₃ ) does not satisfy such a relationship, it is difficult to peel off from the base material, and the base material can be reinforced for a longer or larger peeling load. In addition, by satisfying such a relationship between the D value and E ₄ t ₄ / (E ₃ t ₃ ), the reinforcing material of the present invention has higher rigidity than the case where the insertion material layer 4 is not interposed. Since an additional material can be used, the base material can be reinforced more firmly.

Here, each case of D = 0.5, 1, 2, and 4 has been described as a specific example. However, those skilled in the art will understand Formula [28], Formula [29] described later, A preferable E ₄ t ₄ / (E ₃ t ₃ ) value can be selected for other D values based on the equation [30] and FIG.

  Further, the fluctuation range of each curve in FIG. 6 is small, and the equation [28] can be approximated by the following equation.

Further, when E ₄ t ₄ / (E ₃ t ₃ ) satisfies the following expression, the reinforcing material does not have the insertion material layer 4 or E ₄ t ₄ / (E ₃ t ₃ ) does not satisfy the following expression. Compared to the case, the reinforcing material is hard to peel off from the base material, and the base material can be reinforced for a longer or larger peeling load.

Here, the application range of E ₃ t ₃ / (E ₁ t ₁ ) is usually between 0.05 and 0.5, and the application range of D is between 0.5 and 4.

FIG. 12 shows a specific example of each case of D = 0.5, ₁ , 2, and 4 in the range of E ₃ t ₃ / (E ₁ t ₁ ) = 0.05 to 0.5. The positional relationship between [28] and its approximate expression [29] is shown. As is clear from FIG. 12, any of D = 0.5, 1.0, 2.0, and 4.0 in the range of E ₃ t ₃ / (E ₁ t ₁ ) = 0.05 to 0.5. Also in the case of, the approximate expression [29] is always lower than the expression [28]. As is clear from this, when E ₃ t ₃ / (E ₁ t ₁ ) = 0.05 to 0.5 and D = 0.5 to 4.0, the expression [30] is satisfied. If E ₄ t ₄ / (E ₃ t ₃ ) is selected, the reinforcing material does not always have the insertion material layer 4 or E ₄ t ₄ / (E ₃ t ₃ ) does not satisfy the formula [30]. As compared with the case, it is possible to obtain a reinforcing material that is hard to peel off from the base material.

In one preferred embodiment of the present invention, when the reinforcing material of the present invention and the base material 1 are bonded via the adhesive layer 2, E ₃ t ₃ / (E ₁ t ₁ ) = 0.05-0. .5, D = 0.5 to 4.0, and E ₄ t ₄ / (E ₃ t ₃ ) satisfies the formula [30].

  In this document, “reinforcement” means repairing or repairing a defect in a structure, preventing or reducing a predicted defect in the structure, or improving the strength of the structure unless otherwise specified. To do.

  INDUSTRIAL APPLICABILITY According to the present invention, there are provided a new reinforcing material that is difficult to peel off from a base material, a manufacturing method thereof, a new reinforced construction structure having the reinforcing material, and a new reinforcing method for a construction structure using the reinforcing material.

  According to the present invention, in the reinforcing material having a laminated structure in which the insertion material is interposed between the additional material and the base material, the ratio of the rigidity of the insertion material layer to the rigidity of the additional material layer is 0.5 or less. Compared to the case where no insertion material layer is interposed or the ratio of the rigidity of the insertion material layer to the rigidity of the additional material layer is larger than 0.5, the reinforcing material is not easily peeled off from the base material, and the peeling load is longer or larger. It is now possible to reinforce the base material.

  In addition, by interposing an insert material layer having a rigidity of 0.5 times or less of the rigidity of the additional material layer according to the present invention between the base material and the additional material layer, compared to a case where no insert material layer is interposed, Since an additional material having higher rigidity can be used, the base material can be reinforced more firmly.

  The present invention is also applicable to, for example, a base material (for example, stone, wood, concrete) that is difficult to install by attaching a restraining jig or welding.

  Further, if the reinforcing method of the present invention is used, it is not necessary to attach or weld a restraining jig, so that even a person who does not have advanced technology can easily reinforce the base material.

FIG. 1 is a schematic side view when an additional material layer 3 is bonded to a base material 1 via an adhesive layer 2 in accordance with a conventional construction method. FIG. 2A shows a book having a structure in which an additional material layer 3, an insertion material layer 4, and an adhesive layer 5 are stacked, and the additional material layer 3 and the insertion material layer 4 are laminated via the adhesive layer 5. It is a side schematic diagram of the reinforcing material of the invention. FIG. 2B is a schematic side view when the reinforcing material of the present invention is laminated on one side of the base material 1 with the adhesive 2 interposed therebetween. FIG. 2C is a schematic side view when the reinforcing material of the present invention is laminated on both sides of the base material 1 with the adhesive 2 interposed therebetween. FIG. 3 is a schematic side view showing force balance in a minute section when the reinforcing material of the present invention is bonded to the base material 1 via the adhesive layer 2 according to the present invention. In FIG. 4, formulas [21], [26], and [28] are shown by taking the case of K ₂₁ = K ₂₀ = 0.36, 0.42, 0.48 as an example. The curve given by Equation [21] for K ₂₁ = 0.36 intersects with the straight line given by Equation [26] for K ₂₀ = 0.36 at point A. Similarly, the curve given by Equation [21] for K ₂₁ = 0.42 intersects with the straight line given by Equation [26] for K ₂₀ = 0.42 at point B. Further, the curve given by equation [21] for K ₂₁ = 0.48 intersects the straight line given by equation [26] for K ₂₀ = 0.48 at point C. A curve connecting points A, B, and C is represented by the curve of Expression [28]. In FIG. 5, the case of K ₂₁ = K ₂₀ = 0.36 is taken as an example, and the equations [21] and [26] are shown. Let I be the curve of the equation [21] representing the relationship between E ₄ t ₄ / (E ₃ t ₃ ) and E ₃ t ₃ / (E ₁ t ₁ ) in the present invention. The straight line of the formula [26] representing the value of E ₃ t ₃ / (E ₁ t ₁ ) in the conventional method (when the insertion material layer 4 is not interposed between the additional material layer 3 and the base material ₁ ) is defined as II. . The regions below I ([R1] and [R2]) are regions in which the reinforcing material does not peel from the base material with respect to the set peeling load in the present invention. On the other hand, the region ([R1] and [R3]) on the left side of the line II is a region where the reinforcing material does not peel from the base material with respect to the set peeling load in the conventional method. The region below [I] and the right side from [II] ([R2]) is a region where peeling can be prevented according to the present invention, although peeling cannot be prevented by the conventional method with respect to the set peeling load. With the present invention, it is possible to apply the conventional higher Method _{E 3 t 3 / (E 1} t 1), to prevent peeling of the reinforcing member. In other words, if the present invention is used, the additional material layer 3 having higher rigidity than the conventional method can be applied to the base material 1, and therefore, the base material 1 can be reinforced more strongly than the conventional method. it can. FIG. 6 shows the result given by the equation [28] for each case where the value of D is 0.5, 1, 2, and 4. E ₄ t ₄ / (E ₃ t ₃ ) is between about 0.5 and about 0.6 for D = 4, between about 0.4 and about 0.5 for D = 2, = 1 to about 0.3 to about 0.4, and D = 0.5 to about 0.2 to about 0.3, and the fluctuation range of each curve is small. As the value of D increases, so does the curve. That is, as the value of D increases, the rigidity of the insert can be increased. FIG. 7 is a schematic view of the test piece used in Example 1. FIG. 8 is a diagram showing the test results of Example 1. The vertical axis represents the value obtained by dividing the load P ₁ when the carbon fiber plate is peeled off by the method of the present invention by the load P ₀ when the carbon fiber plate is peeled off by the conventional method. FIG. 9 is a schematic view of the test piece used in Example 2. FIG. 10 shows that the reinforcing material of the present invention when the insertion material layer 4 is slightly larger than the additional material layer 3 (the end of the insertion material layer 4 exists outside the end of the additional material layer 3). 1 shows a schematic side view of a reinforced construction structure of the present invention when bonded to both sides of a material 1. FIG. FIG. 11A is a schematic side view of an example of the reinforcing material of the present invention partially having a laminated structure in which the additional material layer 3 and the insertion material layer 4 are laminated via the adhesive layer 5. 11 (b), 11 (c), 11 (d) and 11 (e) show a part of a laminated structure in which the additional material layer 3 and the insertion material layer 4 are laminated with the adhesive layer 5 interposed therebetween. It is a side schematic diagram of an example of a reinforced construction structure. FIG. 12 shows the positional relationship between Expression [28] and its approximate expression [29]. For the range of E ₃ t ₃ / (E ₁ t ₁ ) = 0.05 to 0.5, the approximation formula is always used for any case of D = 0.5, 1.0, 2.0, and 4.0. [29] is below formula [28]. When E ₃ t ₃ / (E ₁ t ₁ ) = 0.05 to 0.5 and D = 0.5 to 4.0, E ₄ t ₄ / ( If E ₃ t ₃ ) is selected, the base material is always compared with the case where the reinforcing material does not have the insertion material layer 4 or when E ₄ t ₄ / (E ₃ t ₃ ) does not satisfy the formula [30]. A reinforcing material that is difficult to peel off can be obtained.

Explanation of symbols

1: Base material 2: Adhesive 3: Additive material layer 4: Insert material layer 5: Adhesive <Material characteristics>
E: Young's modulus of each material.
G: Shear elastic modulus of each material.
E ₁ : Young's modulus of base material 1
E ₃ : Young's modulus of the additional material layer 3
E ₄ : Young's modulus of the insertion material layer 4.
G ₂ : Shear elastic modulus of the adhesive layer 2.
G ₅ : Shear elastic modulus of the adhesive layer 5.
T ₂₁ : The smaller value of the tensile shear bond strength at the interface between the adhesive layer 2 and the base material 1 and the tensile shear bond strength at the interface between the adhesive layer 2 and the insert material layer 4.
T ₅₁ : The smaller value of the tensile shear bond strength at the interface between the adhesive layer 5 and the insertion material layer 4 and the tensile shear bond strength at the interface between the adhesive layer 5 and the additional material layer 3.
T ₂₀ : When the insertion material is not inserted, the tensile shear adhesive strength at the interface between the adhesive layer 2 and the base material 1 and the tensile shear adhesive strength at the interface between the adhesive layer 2 and the additional material layer 3 are small. One of the values.
μ: Poisson's ratio of each material.
<Dimensions>
h ₂ : thickness on one side of the adhesive layer 2.
h ₅ : thickness on one side of the adhesive layer 5.
L: Half length of the additional material layer 3.
t ₁ : thickness of the base material 1 (however, t ₁ when the additional material is provided on both sides is the thickness of the base material 1, and t ₁ when the additional material is provided on one side is the base ₁₎ The thickness of the material 1 is 2).
t ₃ : thickness on one side of the additional material layer 3
t ₄ : The thickness of one side of the insertion material layer 4.
<Stress>
σ ₀ : Stress generated in the base material 1 at a position where the additional material layer 3 is not bonded.
σ ₁ : Stress generated in the base material 1 at the position where the additional material layer 3 is bonded.
σ ₃ : Stress generated in the additional material layer 3
σ ₄ : Stress generated in the insertion material layer 4.
τ ₂ : Shear stress generated in the adhesive layer 2.
τ ₅ : Shear stress generated in the adhesive layer 5.
τ ₂₀ : Peeling shear stress generated at the adhesion end of the adhesive layer 2 when no insertion material is inserted.
τ ₂₁ : Peeling shear stress generated at the adhering end of the adhesive layer 2 when one insert is inserted.
τ ₅₁ : Peeling shear stress generated at the adhered end of the adhesive layer 5 when one insert is inserted.
<Other symbols>
D: a parameter composed of each shear elastic modulus and each one-side thickness of the adhesive layer 2 and the adhesive layer 5.
F: Parameters composed of the Young's modulus and thickness of the base material 1 and the Young's modulus and thickness of each side of the additional material layer 3 and the insertion material layer 4.
K ₂₀ : a parameter composed of E ₁ , t ₁ , G ₂ , h ₂ , T ₂₀ and σ ₀ .
K ₂₁ : a parameter composed of E ₁ , t ₁ , G ₂ , h ₂ , T ₂₁ and σ ₀ .
K ₅₁ : A parameter consisting of E ₁ , t ₁ , G ₂ , h ₂ , T ₅₁ and σ ₀ .
P ₀ : Load when the carbon fiber plate is peeled off by the conventional method.
P ₁ : Load when the carbon fiber plate is peeled off by this construction method.
ξ: A parameter composed of the Young's modulus and thickness of the base material 1 and the Young's modulus and thickness on one side of the additional material layer 3.
c ₂ : A parameter composed of the shear elastic modulus and one-side thickness of the adhesive layer 2, the Young's modulus and thickness of the base material 1, and ξ.
r: parameter consisting of D, F and ξ.
s: parameter consisting of D, F and ξ.
α: parameter consisting of r and s.
β: parameter consisting of r and s.
A: A parameter consisting of F, L, c ₂ , α, β and ξ.
B: A parameter consisting of F, L, c ₂ , α, β and ξ.
x: Horizontal coordinates with the center of the additional material as the origin.

  EXAMPLES Examples of the present invention will be described below, but these examples are explanations for easier understanding of the present invention, and do not limit the present invention.

When a glass fiber sheet is used as the insert material and a carbon fiber plate is used as the additional material, a tensile force is applied to the test piece shown in FIG. 7 for comparison between the present method and the conventional method, and the load when the carbon fiber plate is peeled off, Compare this method with the conventional method. The base material 1 is E ₁ = 203.5 GPa, t ₁ = 11.58 mm steel plate, the insert material layer 4 is E ₄ = 120 GPa, t ₄ = 0.115 mm glass fiber sheet, and the additional material layer 3 is E ₃ = 141 GPa. For the carbon fiber plate, the adhesive layer 2 and the adhesive layer 5, an epoxy resin layer of G ₂ = G ₅ = 0.743 GPa is used. As shown in Table 2, test pieces were prepared for carbon fiber plate thicknesses t ₃ = 4.0 mm and t ₃ = 6.0 mm. The thickness of the epoxy resin layer is a thickness measured using a caliper after the test piece is completed. Table 2 is obtained by substituting the selected value of E ₄ t ₄ / (E ₃ t ₃ ), the value of E ₃ t ₃ / (E ₁ t ₁ ), and the value of D into equation [29]. The limit value of E ₄ t ₄ / (E ₃ t ₃ ) is shown. Selection values of _{E 4 t 4 / (E 3} t 3) is less than the limit value of _{E 4 t 4 / (E 3} t 3).

The test results are shown in FIG. The vertical axis represents a value obtained by dividing the load P ₁ when the carbon fiber plate is peeled off by this construction method by the load P ₀ when the carbon fiber plate is peeled off by the conventional construction method. As can be seen from this figure, the load when the carbon fiber plate is peeled off by this method is larger than the load when the carbon fiber plate is peeled off by the conventional method.

When a glass fiber sheet is used as the insert material and a carbon fiber sheet is used as the additional material, a tensile force is applied to the test piece shown in FIG. 9 for comparison between the present method and the conventional method, and the load when the carbon fiber sheet is peeled off, Compare this method with the conventional method. The base material 1 is E ₁ = 212.9 GPa, t ₁ = 8.6 mm steel plate, the insert material layer 4 is E ₄ = 120 GPa, t ₄ = 0.115 mm glass fiber sheet, and the additional material layer 3 is E ₃ = 450 GPa. , T ₃ = 1.63 mm carbon fiber sheet, and G ₂ = G ₅ = 0.755 GPa epoxy resin layer is used for the adhesive layer 2 and the adhesive 5. The thickness of the epoxy resin layer shown in Table 3 is a thickness measured using a caliper after the test piece is completed. Table 3 is obtained by substituting the selected value of E ₄ t ₄ / (E ₃ t ₃ ), the value of E ₃ t ₃ / (E ₁ t ₁ ), and the value of D into equation [29]. The limit value of E ₄ t ₄ / (E ₃ t ₃ ) is shown. Selection values of _{E 4 t 4 / (E 3} t 3) is less than the limit value of _{E 4 t 4 / (E 3} t 3). The result of the tensile test was P ₁ / P ₀ = 1.37. Therefore, the load when the carbon fiber sheet is peeled off by this construction method is larger than the load when the carbon fiber sheet is peeled off by the conventional construction method.

Claims (10)

It has an additional material layer 3, an insertion material layer 4, and an adhesive layer 5,
The additional material layer 3 and the insertion material layer 4 are laminated via the adhesive layer 5, and
The ratio of the rigidity of the insertion material layer 4 to the rigidity of the additional material layer 3 is 0.5 or less.
Reinforcement material for construction structures. The reinforcement material for a construction structure according to claim 1, wherein the ratio of the rigidity of the insertion material layer 4 to the rigidity of the additional material layer 3 is 0.4 or less. The reinforcing material for a construction structure according to claim 1, wherein the ratio of the rigidity of the insertion material layer 4 to the rigidity of the additional material layer 3 is 0.3 or less. The reinforcement material for a construction structure according to claim 1, wherein the ratio of the rigidity of the insertion material layer 4 to the rigidity of the additional material layer 3 is 0.2 or less.   The reinforcing material according to claim 1, wherein the additional material layer 3 is a carbon fiber plate or a carbon fiber sheet, and the insertion material layer 4 is a glass fiber sheet or an aramid fiber sheet. Applying or impregnating an adhesive to the surface of the additive and / or insert,
A step of overlaying an additive and an insert applied with or impregnated with an adhesive, and
Curing the adhesive,
The manufacturing method of the reinforcing material of Claim 1 including this. Arranging the additional material and the insertion material through a predetermined gap;
Filling the gap with an adhesive, impregnating the additive and the insert with the adhesive, and
The manufacturing method of the reinforcing material of Claim 1 including the process of hardening an adhesive agent.   A reinforcing material with an adhesive layer 2 of a construction structure, wherein the adhesive layer 2 is adhered to the reinforcing material insertion material layer 4 according to claim 1. The reinforcing material according to claim 1, an adhesive layer 2, and a base material 1,
A reinforced construction structure in which a reinforcing material insertion material layer 4 and a base material 1 are bonded to each other through an adhesive layer 2. A method for reinforcing a construction structure including at least one step selected from the group consisting of the following steps (I) to (III):
(I) a step of bonding the insertion material layer 4 to the base material 1 of the construction structure, and further bonding the additional material layer 3 to the insertion material layer 4;
(II) a step of bonding the reinforcing material insertion material layer 4 according to claim 1 to the base material 1 of the construction structure, or
(III) The process of sticking the reinforcement material with the adhesive bond layer 2 of Claim 8 to the base material 1 of a construction structure.

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