JP2020176492A - Fiber-reinforced plastic member and fiber-reinforced plastic composite structure - Google Patents

Abstract

To provide a fiber-reinforced plastic member which can join a fiber-reinforced plastic part and another component without impairing rigidity of the fiber-reinforced plastic part, and a fiber-reinforced plastic composite structure which can join a fiber-reinforced plastic part and another member such as a roof part.SOLUTION: A fiber-reinforced plastic member 10 is used in a column-beam frame of a structure and is obtained by joining a fiber-reinforced plastic part 11 to another component 20, in which the fiber-reinforced plastic part 11 includes an FRP structure part 12 and an FRP non-structure part 13 provided on an outer peripheral surface of the FRP structure part 12. The FRP non-structure part 13 is formed with a through hole 13s, and the other component 20 is fixed to the fiber-reinforced plastic part 11 while a rivet, a bolt or a dowel 25 inserted to the through hole 13s is interposed therebetween.SELECTED DRAWING: Figure 2

Description

The present invention relates to a fiber reinforced plastic member and a fiber reinforced plastic composite structure.

In recent years, fiber reinforced plastics, which have high rigidity and are lightweight, have been attracting attention as members constituting columns and beams of buildings. For example, as described in Patent Document 1 and Patent Document 2, it has been proposed to join fiber reinforced plastics to a plurality of woods with an adhesive or the like to form laminated wood. In this way, fiber reinforced plastics are sometimes used in combination with wood for the purpose of suppressing the increase in size and weight of members while ensuring strength.
Further, Patent Document 3 is an FRP profile having at least two types of reinforcing fibers including carbon fibers, wherein at least a part of the carbon fibers is arranged in the longitudinal direction of the profile. The profile is disclosed. The shape of the cross section of the FRP profile is substantially uniform in the longitudinal direction, forming an I shape and an H shape. The FRP profile is used, for example, for aggregates and frame materials of structures, beams, beams, columns, and the like.

When joining other members to the fiber reinforced plastic part as described in Patent Document 3, it is conceivable to use an adhesive as in the case of forming the laminated wood of Patent Document 1 and Patent Document 2. Be done. Alternatively, it is conceivable to provide a through hole in the fiber reinforced plastic portion and bolt-join it with another member.
However, the durability and fire resistance of the adhesive during long-term use are not clear and reliability, especially when the fiber reinforced plastic part is used as a structural material to support other members as described above. Lacking.
Further, in the case of bolt joining, a cross-sectional defect occurs in the fiber reinforced plastic portion by providing a through hole in the fiber reinforced plastic portion. In the fiber reinforced plastic part, by providing the through hole, the actual cross-sectional area obtained by subtracting the defect caused by the through hole is calculated as the defect cross-sectional area ratio which is the value obtained by dividing by the cross-sectional area including the through hole. The yield strength drops significantly more than the value. That is, when the fiber reinforced plastic portion and another member are bolted together, the rigidity of the fiber reinforced plastic portion may decrease.

JP-A-2007-245431 JP-A-2010-221514 Japanese Unexamined Patent Publication No. 9-2031159

The problem to be solved by the present invention is a fiber reinforced plastic member capable of joining a fiber reinforced plastic portion and other constituent materials without impairing the rigidity of the fiber reinforced plastic portion, and a fiber reinforced plastic portion and a roof portion. It is to provide a fiber reinforced plastic composite structure which can be bonded with other members.

As a fiber reinforced plastic member that combines fiber reinforced plastic and other constituent materials (woody part, alloy part, other FRP part), the present inventors use a fiber reinforced plastic part formed of fiber reinforced plastic as a structural resistance element. It is formed by the FRP structural part to be joined and the FRP non-structural part for joining with other constituent materials, and through the through hole provided in the FRP non-structural part, using rivets, bolts and dowels with other constituent materials. We have arrived at the present invention by focusing on the fact that fiber reinforced plastics and other constituent materials can be integrated even if it is a fiber reinforced plastic that is difficult to drive into a joining tool or the like by joining.
The present invention employs the following means in order to solve the above problems. That is, the present invention is a fiber reinforced plastic member in which a fiber reinforced plastic portion and another constituent material are joined, which is used for a beam frame of a structure, and the fiber reinforced plastic portion is the FRP structural portion and the above. The FRP non-structural portion provided on the outer peripheral surface of the FRP structural portion is provided, and the FRP non-structural portion is provided with a through hole, and the other constituent material is a rivet, a bolt or a rivet through which the through hole is inserted. Provided is a fiber reinforced plastic member characterized in that it is fixed to the fiber reinforced plastic portion with a dowel interposed therebetween.
According to the above configuration, the fiber reinforced plastic portion includes an FRP structural portion and an FRP non-structural portion, and other components include rivets, bolts or dowels through which through holes formed in the FRP non-structural portion are inserted. By interposing, it is joined to the fiber reinforced plastic part. That is, the through hole used for joining with rivets, bolts or dowels is not an FRP structural portion that is expected to function as a structural material that supports other constituent materials, but an FRP non-structural portion provided on the outer peripheral surface thereof. Since it is opened in, no cross-sectional loss occurs due to the opening of a through hole in the FRP structure. Therefore, the fiber reinforced plastic portion and other constituent materials can be joined without impairing the rigidity of the fiber reinforced plastic portion. The other constituent materials referred to here are exterior materials such as wood parts, alloy parts, and other FRP parts provided around the fiber reinforced plastic parts.

In one aspect of the present invention, the FRP non-structural portion is a projecting body integrally molded with the FRP structural portion so as to project outward from the FRP structural portion, and is continuous along the FRP structural portion. It is characterized in that it is provided intermittently or intermittently.
According to the above configuration, the FRP non-structural portion is provided so as to project outward from the FRP structural portion, and the FRP non-structural portion is joined to other constituent materials, whereby the FRP structural portion is formed. It is possible to realize a fiber reinforced plastic member in which a fiber reinforced plastic portion and other constituent materials are joined without providing a cross-sectional defect portion.
In particular, since the FRP structural portion and the FRP non-structural portion are integrally molded, stress can be smoothly transmitted between them.

Further, the present invention is a fiber reinforced plastic composite structure in which a fiber reinforced plastic portion and another member are joined, which is used for a column-beam structure of a structure, and the fiber reinforced plastic portion includes an FRP structure portion and the FRP. The FRP non-structural portion is provided on the outer peripheral surface of the structural portion, and the FRP non-structural portion includes a projecting body formed so as to project outward from the FRP structural portion, and is provided with the fiber reinforced plastic portion. The other member provides a fiber reinforced plastic composite structure characterized in that it is rivet-joined or bolt-joined through a through hole formed in the projecting body. The other members referred to here are roofing materials, floor slabs, beams, columns, walls and the like.
According to the above configuration, the fiber reinforced plastic portion includes an FRP structural portion and an FRP non-structural portion, and the roof portion is riveted or bolted through a through hole formed in the FRP non-structural portion. There is. That is, the through hole used for joining with rivets or bolts is not formed in the FRP structural portion expected to function as a structural material for supporting the roof portion, but is formed in the FRP non-structural portion provided on the outer peripheral surface thereof. Therefore, there is no cross-sectional defect due to the opening of the through hole in the FRP structure. Therefore, the FRP structure portion and the roof portion can be joined without impairing the rigidity of the fiber reinforced plastic portion.

According to the present invention, a fiber reinforced plastic member capable of joining a fiber reinforced plastic portion and another constituent material without impairing the rigidity of the fiber reinforced plastic portion, and a fiber reinforced plastic portion and another member such as a roof portion are formed. A fiber reinforced plastic composite structure that can be joined can be provided.

It is a schematic side view of the fiber reinforced plastic composite structure using the fiber reinforced plastic member in embodiment of this invention. It is a vertical sectional view of the fiber reinforced plastic composite structure of FIG. (A) is a perspective view and (b) is a side view of the fiber reinforced plastic part used for the fiber reinforced plastic member. It is a table which shows the result of the bolt joint test performed on the said fiber reinforced plastic part. It is a graph (a) and (b) is a photograph showing the result when the two-sided shear test was carried out as the bolt joint test. It is a graph (a) and (b) is a photograph showing the result when the one-sided shear test was carried out as the bolt joint test. It is explanatory drawing of the shear test performed on the said fiber reinforced plastic part. It is a graph which shows the result of the shear test of FIG. It is a graph which shows the result of the shear test of FIG. It is a table which shows the result of the shear test of FIG. It is a perspective view of the fiber reinforced plastic part about the modification of the said embodiment. It is a perspective view of the fiber reinforced plastic part about the modification of the said embodiment. It is a side view of the fiber reinforced plastic part which concerns on the modification of the said embodiment. It is a vertical sectional view of the fiber reinforced plastic member which concerns on the modification of the said embodiment.

The present invention is a fiber reinforced plastic member in which a fiber reinforced plastic and other constituent materials are combined, and a fiber reinforced plastic composite structure in which a fiber reinforced plastic and another member are joined. One of the features of the present invention is to join a fiber reinforced plastic portion made of fiber reinforced plastic to an FRP structural portion as a structural resistance element and other constituent materials (woody portion, alloy portion, other FRP portion). It is a point formed by the FRP non-structural portion of the above and joined to other constituent materials by rivets, bolts or dowels through a through hole provided in the FRP non-structural portion.
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic side view of a fiber reinforced plastic composite structure using a fiber reinforced plastic (hereinafter referred to as FRP) beam member in the present embodiment. The FRP beam member (FRP member) 10 is installed outside the building 1. The building 1 has an upper structure 1a and a lower structure 1b. The upper structure 1a is provided above the lower structure 1b. The upper structure 1a has a smaller installation area in the horizontal plane than the lower structure 1b, so that the roof portion 4 is provided on the lower structure 1b in a portion other than the upper structure 1a.
The FRP beam member 10 is installed on the roof portion 4 of the building 1. The FRP beam member 10 includes a beam 3 which will be described in detail later, and a roof portion 8 provided above the beam 3. The beam 3 is supported by a plurality of columns 5A to 5F. In the present embodiment, the columns 5A to 5F are provided on the roof portion 4 and the iron base material 4s laid on the roof portion 4. Of the columns 5A to 5F, the column 5A closest to the superstructure 1a extends vertically in the vertical direction. The two columns 5B and 5C on the side away from the upper structure 1a with respect to the support 5A extend upward so as to be inclined toward the upper structure 1a side. On the roof portion 4, the two columns 5D and 5E on the side farthest from the upper structure 1a extend upward so as to be separated from the upper structure 1a. The support column 5F extends from the intermediate portion of the support column 5D so as to be inclined upward toward the upper structure 1a.
The beam 3 is provided on these columns 5A to 5F. The beam 3 is provided so as to be curved so as to gradually extend upward as it is separated from the upper structure 1a side.
A plurality of sets of such columns 5A to 5F and beams 3 are provided at intervals in a direction orthogonal to the paper surface of FIG. The roof portion 8 is provided on these plurality of beams 3.

FIG. 2 is a vertical cross-sectional view of the FRP beam member 10 and the FRP beam roof structure (FRP composite structure) 2. The FRP beam member 10 includes an FRP portion 11 and other constituent members 20. The FRP beam roof structure 2 includes the FRP beam member 10 and a roof portion (other member) 8.
First, the FRP unit 11 will be described with reference to FIGS. 2 and 3. FIG. 3A is a perspective view of the FRP section 11, and FIG. 3B is a side view of the FRP section 11.
The FRP portion 11 is formed of FRP formed by impregnating reinforcing fibers such as carbon fiber, aramid fiber, and vinylon fiber with a resin.
The FRP unit 11 includes an FRP structural unit 12 and an FRP non-structural unit 13. The FRP structure portion 12 is formed in a long shape, and the cross-sectional shape intersecting the central axis thereof has a hollow rectangular shape. That is, the FRP structure portion 12 includes an upper plate portion 12a and a lower plate portion 12b provided at intervals in the vertical direction, and a pair of side plate portions 12c connecting them. As shown in FIG. 2, the side plate portion 12c is joined to each side end portion of the upper plate portion 12a and the lower plate portion 12b when the FRP structure portion 12 is viewed in cross section so as to connect them between the upper and lower plates. It is provided in. The upper plate portion 12a, the lower plate portion 12b, and the pair of side plate portions 12c form a body portion 12d of the FRP structure portion 12, and in the center of the body portion 12d, the upper plate portion 12a, the lower plate portion 12b, A hollow portion S surrounded by the pair of side plate portions 12c is formed.
As shown in FIG. 2, the body portion 12d of the FRP structure portion 12 is built (embedded) in the central portion of the beam 3 in a cross section intersecting the central axis extending in the length direction of the beam 3. That is, the body portion 12d of the FRP structure portion 12 is not exposed to the outside of the beam 3.

The FRP non-structural portion 13 is provided on the outer peripheral surface of the FRP structural portion 12, particularly on the upper surface 12e of the upper plate portion 12a in the present embodiment. In the present embodiment, the FRP non-structural portion 13 is a projecting body 13p integrally molded with the FRP structural portion 12 so as to project outward from the FRP structural portion 12. The projecting body 13p is formed in a flat plate shape, and is provided so as to be substantially parallel to the length direction of the beam 3. As shown in FIG. 3, the projecting bodies 13p are formed in a rectangular shape, and a plurality of projecting bodies 13p are intermittently provided at predetermined intervals in the length direction of the FRP structure portion 12. ..
Each of the projecting bodies 13p is provided with a first through hole 13s and a second through hole (through hole) 13t. These through holes 13s and 13t are formed at intervals from each other so that the first through holes 13s are located below the second through holes 13t.
The other constituent materials 20 will be described later.

The roof portion (other member) 8 includes a first joining member 14, a second joining member 15, and a panel material 18.
The first joining member 14 includes a vertical plate portion 14a, an upper plate portion 14b, and a lower plate portion 14c. The vertical plate portion 14a is provided in close contact with the projecting body 13p so as to extend in the vertical direction from above the upper end of the projecting body 13p to below the first through hole 13s of the projecting body 13p. .. The vertical plate portion 14a is provided with a first through hole 14s and a second through hole 14t at positions corresponding to each of the first through hole 13s and the second through hole 13t of the projecting body 13p so as to communicate with each other. Has been done.
The upper plate portion 14b and the lower plate portion 14c rise vertically outward from the vertical plate portion 14a on the surface of the vertical plate portion 14a opposite to the surface in close contact with the projecting body 13p, and the FRP structure portion 12 It is provided so as to be substantially parallel to the upper plate portion 12a. The upper plate portion 14b is provided at a position between the first through hole 14s and the second through hole 14t. The lower plate portion 14c is provided at the lower end of the vertical plate portion 14a. The lower plate portion 14c is formed so that the length from the vertical plate portion 14a to the outer end portion is shorter than that of the upper plate portion 14b.

The second joining member 15 is formed so as to have a shape substantially symmetrical to that of the first joining member 14, and is provided on the side surface of the projecting body 13p opposite to the first joining member 14. Similar to the first joining member 14, the second joining member 15 includes a vertical plate portion 15a, an upper plate portion 15b, and a lower plate portion 15c. The vertical plate portion 15a is provided in close contact with the projecting body 13p so as to extend in the vertical direction from a position substantially equivalent to the upper end of the projecting body 13p to the position of the lower end of the first joining member 14. In the vertical plate portion 15a, at positions corresponding to each of the first through hole 13s and the second through hole 13t of the projecting body 13p, these, and the first through hole 14s and the second through hole of the first joining member 14 A first through hole 15s and a second through hole 15t are provided so as to communicate with the 14t.
The upper plate portion 15b and the lower plate portion 15c rise vertically outward from the vertical plate portion 15a on the surface of the vertical plate portion 15a opposite to the surface in close contact with the projecting body 13p, and the FRP structure portion 12 It is provided so as to be substantially parallel to the upper plate portion 12a. The upper plate portion 15b is provided at a position equivalent to that of the upper plate portion 14b of the first joining member 14. The lower plate portion 14c is provided at the lower end of the vertical plate portion 15a. The lower plate portion 15c is formed so that the length from the vertical plate portion 15a to the outer end portion is shorter than that of the upper plate portion 15b.

As described above, the second through hole 13t of the projecting body 13p and the second through holes 14t and 15t of the first joining member 14 and the second joining member 15 are provided so as to communicate with each other. The bolts and nuts 16 are tightened so as to insert the second through holes 13t and the second through holes 14t and 15t, whereby the roof portion 8 is joined to and supported by the beam 3.
A long upper support member 17 is provided and joined to the upper end 14g of the first joining member 14 so as to extend in the length direction of the beam 3. The upper support member 17 includes two support plate portions 17b provided across a central axis extending in the length direction, and each of the two support plate portions 17b is a first joining member 14 and a second. The upper support member 17 is provided so as to be located above each of the joining members 15 so as to straddle the projecting body 13p.
The panel material 18 constituting the roof is sandwiched and fixed between each of the support plate portions 17b of the upper support member 17 and the upper plate portions 14b and 15b of the first joint member 14 and the second joint member 15. There is.

The other constituent members 20 of the beam 3 are provided around the outer periphery of the FRP portion 11. The other constituent member 20 is a wooden member in the present embodiment, and includes two upper plate portions 21, two side plate portions 22, and a lower plate portion 23.
The upper plate portion 21 is substantially equivalent to the distance between the upper plate portion 14b and the lower plate portion 14c of the first joining member 14 and the distance between the upper plate portion 15b and the lower plate portion 15c of the first joining member 15. It is a long plate material formed to have the thickness of. Each of the upper plate portions 21 is positioned so as to extend in the length direction of the beam 3, between the upper plate portion 14b and the lower plate portion 14c of the first joining member 14, and the upper plate portion of the first joining member 15. It is inserted between 15b and the lower plate portion 15c. The inner surface 21a of the upper plate portion 21 is provided so as to come into contact with the surfaces of the first joining member 14 and the second joining member 15. The upper plate portion 21 is formed so that the outer surface 21b of the upper plate portion 21 is located outside the outer end portions of the lower plate portions 14c and 15c of the first joining member 14 and the second joining member 15. ..
Screws 24 are screwed into the upper plate portion 21 so as to insert through holes 14u and 15u formed in the first joining member 14 and the second joining member 15, respectively, and the first joining member 14 and the second joining member 14 are screwed. It is fixed to each of the fifteen.
Through holes 21s are provided in the upper plate portion 21 at positions corresponding to the first through holes 14s and 15s of the first joining member 14 and the second joining member 15, respectively. The first through holes 14s and 15s, the first through holes 13s, and the through holes 21s of each upper plate portion 21 communicate with each other, and a dowel 25 is provided so as to insert them. The dowel 25 is formed to have a length such that both ends of the dowel 25 are located outside the outer surface 21b of each upper plate portion 21.

The side plate portion 22 is also a long plate material like the upper plate portion 21, and is provided so as to extend in the length direction of the beam 3. The side plate portion 22 is provided so that the inner surface 22a is in contact with the outer surface 21b of the upper plate portion 21. A hole 22s is provided on the inner surface 22a of the side plate portion 22 at a position corresponding to the through hole 21s of the upper plate portion 21, and the end portion of the dowel 25 is inserted into the hole 22s to form the side plate portion. 22 is fixed to the upper plate portion 21.
When joined to the upper plate portion 21 in this way, the outer surface 22b of the side plate portion 22 is located inside the outer end portions of the first joining member 14 and the second joining member 15, and the side plates. The side plate portion 22 is formed so that the lower end of the portion 22 is located below the lower plate portion 12b of the FRP structure portion 12.
The lower plate portion 23 is also a long plate material like the upper plate portion 21 and the side plate portion 22, and is provided so as to extend in the length direction of the beam 3. The lower plate portion 23 is provided so as to be in contact with the inner surface 22a of each side plate portion 22 and close the space between the side plate portions 22, and is fixed to the side plate portion 22 by screws or dowels (not shown).
In this way, the FRP structural portion 12 of the FRP portion 11 is surrounded by another constituent member 20.

(Structural performance confirmation experiment of fiber reinforced plastic beam)
For beam members made of fiber reinforced plastic, elemental experiments were conducted on the joint performance of bolt joints of FRP material and the shear performance of beam members, and the performance was confirmed.
First, an experiment on the effectiveness of the FRP unit 11 used as the present embodiment and the result thereof will be described. First, the experimental results regarding the joint performance when the bolt joint portion is provided on the FRP material will be described. In this experiment, as the FRP material, a CFRP material formed by laminating impregnated resin carbon fiber sheets and thermosetting with an autoclave was used. As an experiment, a two-sided shear test in which a CFRP plate material is manufactured, one plate material is used as a middle plate, sandwiched between two auxiliary plates and bolted, and pulled in the opposite direction to the intermediate plate and the auxiliary plate, is performed. A direct shear test was carried out in which one middle plate and one sub-plate were bolted and pulled in the same manner. As the middle plate, one having a thickness of 4 mm and one having a thickness of 6 mm were prepared. As the bolt, a one-side bolt that can be tightened from one side was used, and the bolt was tightened until the torque reached 15 Nm. For each test, three test pieces were prepared and tested.
FIG. 4 is a comparison table of each test piece of the bolt joint portion of the FRP material, the maximum load at break for each test piece, and the fracture form. FIG. 5A is a graph showing the relationship between the displacement and the load of the middle plate and the auxiliary plate in the case of a two-sided shear test in which the thickness of the middle plate is 6 mm, and FIG. 5B is a graph showing the relationship between the three test pieces. It is a photograph after the test result in one of. Further, FIG. 6A is a graph showing the relationship between the displacement and the load of the middle plate and the auxiliary plate in the case of a direct shear test in which the thickness of the middle plate is 6 mm, and FIG. 6B is three graphs. It is a photograph after the test result in one of the test bodies.
As shown in FIGS. 4 to 6, in the one-sided and two-sided shear test results in which the bolt joint portion is provided on the FRP material, when a shear force is applied in the material axial direction, the inside between the upper and lower plates of the FRP material is used. The maximum proof stress was reached by breaking through the bolt holes of the plate. Further, when a shearing force was applied in the direction orthogonal to the bolt joint portion, the edge portion of the bolt hole of the test piece was broken at the edge, and the maximum yield strength was reached. From the results of this experiment, when a bolt joint is provided in the FRP material, the bolt hole of the FRP material, which is the base material, expands to reach the maximum proof stress instead of breaking the bolt, and the load is suddenly applied after the maximum proof stress. It was confirmed that the ability was reduced.
Therefore, when joining the FRP material and other constituent materials (woody part, alloy part, other FRP part), a joining method that does not join the FRP structural part is preferable, and a joining method in the FRP non-structural part according to the embodiment of the present invention. Came to invent.

Next, a shear force experiment was conducted on the beam member made of fiber reinforced plastic, and the shear performance of the fiber reinforced plastic member was confirmed. FIG. 7 is a side view for explaining the force of the shearing experiment showing the position of the test piece and the test piece arrangement in the shearing force test on the fiber reinforced plastic beam test piece (CFRP beam material) having a rectangular hollow cross section. is there. The CFRP beam member 100 is a hollow member having an outer dimension of 162 × 78 in cross section and thicknesses of 4 mm and 6 mm in each direction of the cross section, respectively. The CFRP beam member 100 was loaded at two force points 102 from above in a state of being supported by the two fulcrums 101. The load was unidirectionally loaded in one direction after the loading up to the design proof stress was repeated twice. On the displacement meter side, the vertical displacement of the force point 102 and the center of the test piece was measured, and the horizontal displacement and vertical displacement of the fulcrum 101 were measured.
FIG. 8 is a graph showing the relationship between the shearing force and the displacement, which is the test result. FIG. 9 is a graph showing a rosette analysis result of a triaxial strain gauge provided in the center of the upper surface of the CFRP beam member 100. FIG. 10 is a table summarizing the test results for the CFRP beam member 100 shown in FIG. In particular, as shown in FIG. 9, to 3167N / mm ² is the result of the shear stiffness in the material testing, shear modulus obtained from rosette analysis and 4834N / mm ^2, was 1.34 times.
As shown in FIGS. 8 to 10, in the shear results of the reinforced plastic beam test piece, the relationship (solid line) between the shear force and the displacement (member angle) of the experimental result, and the shear stress and the shear strain of the experimental result Both the relationship (solid line) and the initial rigidity were experimental results that roughly matched the initial rigidity of the rosette analysis results (dotted lines in FIGS. 8 and 9) estimated from the rigidity of the fiber-reinforced plastic material constituting the beam cross section. .. In addition, according to the experimental results, the web part of the reinforced plastic beam test piece was sheared and fractured to reach the maximum yield strength. The experimental proof stress value of 44.8 kN exceeded the calculated proof stress of 36.6 kN by about 1.22 times, and showed excellent shear strength.
As described above, the structural performance confirmation experiment of the fiber reinforced plastic beam was carried out, and the effectiveness of the structural performance of the fiber reinforced plastic member according to the present invention was confirmed.

Next, the effects of the fiber-reinforced plastic member and the fiber-reinforced plastic composite structure described above will be described.

The FRP beam member (fiber reinforced plastic member) 10 of the above embodiment is a composite beam member of fiber reinforced plastic and wood in which the FRP portion 11 and other constituent members 20 are joined, which is used for the column-beam structure of the structure. The FRP portion 11 includes an FRP structural portion 12 having a rectangular cross-sectional shape and an FRP non-structural portion 13 provided on the upper surface (outer peripheral surface) 12e of the FRP structural portion 12, and is not FRP. A first through hole (through hole) 13s is provided in the structural portion 13, and the other constituent material 20 is an FRP non-structural portion with a dowel 25 through which the first through hole (through hole) 13s is inserted. It is characterized in that it is fixed to 13.
According to the above configuration, the through hole 13s used for joining by the dowel 25 is not the FRP structural portion 12 which is expected to function as a structural material for supporting the other constituent material 20, but the outer peripheral surface 12e thereof. Since it is provided in the FRP non-structural portion 13 provided in the FRP structural portion 12, no cross-sectional defect occurs due to the opening of the through hole 13s in the FRP structural portion 12. Therefore, the FRP portion 11 and the other constituent members 20 can be joined without impairing the rigidity of the FRP portion 11.

Further, the FRP non-structural portion 13 is a projecting body 13p integrally molded with the FRP structural portion 12 so as to project outward from the FRP structural portion 12, and is provided intermittently along the FRP structural portion 12. It is characterized by being.
According to the above configuration, the FRP non-structural portion 13 is provided so as to project outward from the FRP structural portion 12, and the FRP non-structural portion 13 is joined to another constituent member 20. It is possible to realize the FRP beam member 10 in which the FRP portion 11 and the other constituent members 20 are joined without providing the FRP structural portion 12 with a cross-sectional defect portion.
In particular, since the FRP structural portion 12 and the FRP non-structural portion 13 are integrally molded, stress can be smoothly transmitted between them.

In particular, in the present embodiment, the FRP non-structural portion 13 to be joined to the other constituent member 20 is provided on the upper side of the FRP structural portion 12, and the FRP structural portion 12 is provided on the lower side of the beam cross section, whereby the beam member The bending deformation performance, rigidity, and strength of the FRP structural portion 12 are effectively exhibited as a beam member without the cross section of the FRP non-structural portion 13 hindering the bending characteristics.

Further, the FRP beam roof structure 2 (fiber reinforced plastic composite structure) of the above embodiment is an FRP beam roof structure in which the FRP portion 11 and the roof portion (other members) 8 are joined, which is used for the pillar-beam structure of the structure. The FRP portion 11 includes an FRP structural portion 12 having a rectangular cross-sectional shape and an FRP non-structural portion 13 provided on the upper surface (outer peripheral surface) 12e of the FRP structural portion 12, and is FRP. The non-structural portion 13 includes a projecting body 13p formed so as to project outward from the FRP structural portion 12, and the FRP portion 11 and the roof portion 8 have a second through hole (through hole) formed in the projecting body 13p. ) It is characterized in that it is bolted via 13t.
According to the above configuration, the FRP portion 11 includes the FRP structural portion 12 and the FRP non-structural portion 13, and the roof portion 8 is bolted through the second through hole 13t formed in the FRP non-structural portion 13. It is joined. That is, the second through hole 13t used for joining with the bolt 16 is not the FRP structural portion 12 which is expected to function as a structural material for supporting the roof portion 8, but the FRP non-structural portion provided on the upper surface 12e of the FRP structural portion 12. Since it is formed at 13, no cross-sectional defect occurs due to the opening of the through hole in the FRP structure portion 12. Therefore, the FRP portion 11 and the roof portion 8 can be joined without impairing the rigidity of the FRP portion 11.

The fiber-reinforced plastic member and the fiber-reinforced plastic composite structure of the present invention are not limited to the above-described embodiments described with reference to the drawings, and various other modifications can be considered within the technical scope thereof. ..
For example, the cross-sectional shape of the FRP portion 11 is not limited to a rectangular shape, and the position of the projecting body 13p is not limited to the vicinity of the center in the width direction on the upper surface 12e of the FRP structure portion 12. FIG. 11 shows various modified examples of the FRP unit 11.
The FRP portion 11A of FIG. 11A includes an FRP structural portion 12A having the same shape as that of the above embodiment, but the arrangement of the FRP non-structural portion 13A is different from that of the above embodiment, and the projecting body 13p is an FRP. The side plate portions 12c of the structural portion 12A are provided at both ends in the width direction of the upper plate portion 12a so as to extend upward.
In the FRP portion 11B of FIG. 11B, the upper plate portion 12a and the lower plate portion 12b of the FRP structure portion 12B are provided to be wider than those in the above embodiment, and the cross-sectional shape of the FRP structure portion 12B is substantially abbreviated. It has a square shape. Regarding the FRP non-structural portion 13B, similarly to the above embodiment, the projecting body 13p is provided so as to extend upward from the vicinity of the center of the upper plate portion 12a in the width direction and from the vicinity of the center of the lower plate portion 12b in the width direction. It is provided so as to extend downward. Further, the projecting body 13p is also provided at the upper end and the lower end of the side plate portion 12c so that each of the upper plate portion 12a and the lower plate portion 12b extends to both sides.
In the FRP portion 11C of FIG. 11C, the cross-sectional shape of the FRP structure portion 12C is formed to be a cylindrical shape. The FRP non-structural portion 13C is provided so that the projecting body 13p extends upward from the upper end of the FRP structural portion 12C.

FIG. 12 is a perspective view showing a further modified example of the cross-sectional shape of the FRP portion 11.
In the FRP portion 11D of FIG. 12A, the FRP structure portion 12D is a pair of short flange portions 12f provided at intervals in the vertical direction, and a web portion 12g that connects the flange portions 12f to each other. And, and are formed so that the cross-sectional shape is I-shaped. The projecting body 13p of the FRP non-structural portion 13D is provided near the center in the width direction of the upper flange portion 12f so that the web portion 12g extends upward.
In the FRP portion 11E of FIG. 12B, the FRP structure portion 12E includes one flange portion 12h and a web portion 12i provided so as to extend above the flange portion 12h. , The cross-sectional shape is formed to be T-shaped. The projecting body 13p of the FRP non-structural portion 13E is provided at the upper end of the web portion 12i so that the web portion 12i extends upward.
In the FRP portion 11F of FIG. 12 (c), the FRP structure portion 12F is provided with a pair of flange portions 12j having a width longer than the flange portion 12f of the FRP portion 11D provided at intervals in the vertical direction, and these flanges. It is provided with a web portion 12k for connecting the portions 12j to each other, and is formed so that the cross-sectional shape is H-shaped. The projecting body 13p of the FRP non-structural portion 13F is provided near the center in the width direction of the upper flange portion 12j so that the web portion 12k extends upward.
In addition to the above, the shape of the FRP portion 11 is not limited to the above as long as it has sufficient strength. In these cases, the inside of the FRP structure portion 12 may be hollow as in the above embodiment, or may be formed to be solid, that is, to have no space.
Similarly, in the above embodiment, the cross-sectional shape of the FRP structure portion constituting the fiber reinforced plastic portion is a hollow rectangular shape, but a solid rectangular shape, an I shape, a T shape, an H shape, and a cylindrical shape. It may be formed in any of them.

Further, in the above embodiment, a plurality of projecting bodies 13p are provided intermittently at predetermined intervals in the length direction of the FRP structure portion 12, but the present invention is not limited to this. In the FRP non-structural portion 13G of the FRP portion 11G of FIG. 13, the projecting body 13p is provided so as to be continuous along the length direction of the FRP structural portion 12G. In such an FRP non-structural portion 13G, a plurality of first and second through holes 13s and 13t are provided at predetermined intervals in the length direction of the FRP portion 11G, respectively.
Further, in the above embodiment, the FRP portion 11 supports the roof portion 8 as another constituent material, but the present invention is not limited to this. The other member 8 joined to the FRP portion 11 and supported by the FRP portion 11 may be, for example, a floor slab.
Further, in the above embodiment, the bolts and nuts 16 are tightened so as to insert the second through hole 13t of the projecting body 13p and the second through holes 14t and 15t of the first joining member 14 and the second joining member 15. As a result, the roof portion 8 was bolted to the FRP portion 11, but the present invention is not limited to this. For example, rivets are provided so as to insert the second through hole 13t of the projecting body 13p and the second through holes 14t and 15t of the first joining member 14 and the second joining member 15, and the roof portion 8 is formed in the FRP portion 11. It does not matter if it is riveted.
Further, in the above embodiment, a dowel 25 is provided so as to insert the first through hole 13s of the projecting body 13p and the first through holes 14s and 15s of the first joining member 14 and the second joining member 15. As a result, the other constituent members 20 were joined to the FRP portion 11, but the present invention is not limited to this. For example, FIG. 14 shows an FRP beam member 10H in which another constituent member 20H is joined to a projecting body 13p of the FRP portion 11 via a joining member 30. The joining member 30 is a steel material having an L-shaped cross section in which two steel plates 30a and 30b are vertically joined. One steel plate 30a is provided along the projecting body 13p and is fixed to the projecting body 13p by a bolt 31 that inserts the through hole 30s provided in the steel plate 30a and the first through hole 13s of the projecting body 13p. ing. The other constituent material 20H is joined to the other steel plate 30b by screws 32. In this way, the other constituent member 20H may be fixed to the FRP portion 11 with a bolt 31 for inserting the through hole 13s interposed therebetween. In this case, the other constituent member 20H may be fixed by rivets instead of the bolts 31.

Further, in the above embodiment, as the fiber reinforced plastic member 10, the FRP portion 11 is composed of a hollow rectangular FRP structural portion 12 and an FRP non-structural portion 13 forming a projecting body, and is formed on the outer periphery of the FRP portion 11. Although the wood part 20 is provided as another constituent material, the other constituent material is not limited to the wood part 20, and may be an alloy part formed of an alloy material or another FRP part formed of FRP. .. Similarly, the fiber reinforced plastic composite structure 2 is not limited to joining the fiber reinforced plastic part and the roof part, but joins the fiber reinforced plastic part and other members (floor slab, beam material, column material, wall material). You may let me.
Further, in the above embodiment, in the FRP beam roof structure 2, the FRP beam member 10 is formed of the FRP portion 11 and other constituent members 20, but the FRP beam member 10 is not limited to the configuration. It may be formed only by 11.

In addition to this, as long as the gist of the present invention is not deviated, the configurations listed in the above embodiments can be selected or changed to other configurations as appropriate.

2 FRP beam roof structure (fiber reinforced plastic composite structure)
3 Beam 13t 2nd through hole (through hole)
5 Strut 14 1st joint member 8 Roof part (other member) 14s, 15s 1st through hole 10, 10H FRP beam member (fiber reinforced plastic member)
11, 11A ~ 11G FRP part 14t, 15t 2nd through hole 12, 12A ~ 12G FRP structure part 15 2nd joint member 12e Upper surface (outer peripheral surface) 16 Bolts / nuts (bolts)
13, 13A ~ 13G FRP non-structural part 20, 20H Other components 13p projecting body 25 dowel 13s 1st through hole (through hole) 31 bolt

Claims (3)

It is a fiber reinforced plastic member in which a fiber reinforced plastic part and other constituent materials are joined, which is used for a column beam frame of a structure.
The fiber reinforced plastic part includes an FRP structure part and
The FRP non-structural portion provided on the outer peripheral surface of the FRP structural portion is provided.
A through hole is provided in the FRP non-structural part,
The fiber reinforced plastic member is characterized in that the other constituent material is fixed to the fiber reinforced plastic portion by interposing a rivet, a bolt or a dowel through which the through hole is inserted. The FRP non-structural portion is a projecting body integrally molded with the FRP structural portion so as to project outward from the FRP structural portion, and is provided continuously or intermittently along the FRP structural portion. The fiber reinforced plastic member according to claim 1, wherein the fiber reinforced plastic member is provided. It is a fiber reinforced plastic composite structure in which a fiber reinforced plastic part and other members are joined, which is used for the column and beam frame of a structure.
The fiber reinforced plastic portion includes an FRP structural portion and an FRP non-structural portion provided on the outer peripheral surface of the FRP structural portion.
The FRP non-structural portion includes a projecting body formed so as to project outward from the FRP structural portion.
The fiber reinforced plastic composite structure is characterized in that the fiber reinforced plastic portion and the other member are riveted or bolted through a through hole formed in the projecting body.