JP7005013B2 - Buckling restraint brace - Google Patents

Description

The present invention relates to a buckling restraint brace.

Conventionally, for example, a buckling restraint brace disclosed in Patent Document 1 has been used in order to be incorporated in a frame and absorb vibration energy generated in the frame. The buckling restraint brace of Patent Document 1 includes a steel pipe and a low yield point steel material arranged inside the steel pipe, and concrete is filled between the steel pipe and the low yield point steel material, and the low yield point steel material is made of concrete. Buckling is suppressed.

Japanese Unexamined Patent Publication No. 6-57820

However, since the buckling restraint brace of Patent Document 1 is composed of a steel pipe and concrete, it is very heavy and has a problem that it is difficult to carry it into a construction site or handle it at a construction site. Further, since the buckling restraint brace of Patent Document 1 is made of steel, there is a problem that an imbalance occurs in design when it is incorporated into a wooden structure or the like.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a buckling restraint brace that can be reduced in weight and is also suitable for application to a wooden structure.

The buckling restraint brace of the present invention extends along a unidirectionally extending brace body and the extending direction of the brace body, and is substantially relative to the extending direction of the brace body so as to suppress buckling of the brace body. A buckling restraint brace provided with wooden brace stiffening members provided on both sides in the vertical direction, wherein the fiber reinforcing member containing reinforcing fibers suppresses buckling of the brace body. It is characterized by being fixed to the surface.

Further, the fiber-reinforced member is a fiber-reinforced sheet containing reinforcing fibers extending in at least one direction, and the fiber-reinforced sheet is such that the extending direction of the reinforcing fibers of the fiber-reinforced sheet intersects with the extending direction of the brace body. As such, it is preferable that the brace stiffening member is wound around and fixed around the brace stiffening member.

Further, the fiber reinforced member is a fiber reinforced plate containing reinforcing fibers extending in at least one direction, and the fiber reinforced plate has a direction in which the reinforcing fibers of the fiber reinforced plate extend with respect to a direction in which the brace body extends. It is preferable that the brace stiffening member is fixed to the surface so as to be parallel to each other.

Further, it is preferable that the buckling restraint brace is further connected to the end portion of the brace body in the extending direction of the brace body, and includes a wooden extension member extending along the extending direction of the brace body.

Further, the extension member is connected to the brace body by a brace body side connecting member fixed to the end of the brace body, and the brace body side connecting member is substantially parallel to the extending direction of the brace body. It is preferable to include a connecting portion that extends and is fixed to the extension member, and a flange portion that extends substantially perpendicular to the extending direction of the brace body and abuts on the end portion of the extension member.

Further, in the extending direction of the brace main body, a gap is provided between the brace stiffening member and the flange portion of the brace body side connecting member, and the gap is the distance in the extending direction of the brace main body. It is preferable to provide a cushioning material that can be expanded and contracted as it expands and contracts.

Further, it is preferable that the end portion of the brace stiffening member is provided with a flange portion accommodating portion capable of accommodating the flange portion of the brace body side connecting member.

According to the present invention, it is possible to provide a buckling restraint brace that can be reduced in weight and is also suitable for application to wooden structures.

It is a figure which shows the buckling restraint brace which concerns on 1st Embodiment of this invention, (a) is the front view of the buckling restraint brace, (b) is the top view of the buckling restraint brace, (a). c) is a sectional view taken along line AA of (a). It is a figure which shows the buckling restraint brace which concerns on 2nd Embodiment of this invention, (a) is the front view of the buckling restraint brace, (b) is the top view of the buckling restraint brace, (a). c) is a partially enlarged view of (a). It is a figure which shows the buckling restraint brace which concerns on 3rd Embodiment of this invention, (a) is the front view of the buckling restraint brace, (b) is the top view of the buckling restraint brace, (a). c) is a sectional view taken along line BB of (a).

Hereinafter, buckling restraint braces according to some embodiments of the present invention will be described with reference to the accompanying drawings. However, each of the embodiments shown below is merely an example, and the buckling restraint brace of the present invention is not limited to the following examples.

<First Embodiment>
1 (a) to 1 (c) show the buckling restraint brace 1 of the first embodiment. As shown in the figure, the buckling restraint brace 1 includes a brace body 2 extending in one direction X and a wooden brace stiffening member 3 extending along the extending direction X of the brace body 2. The buckling restraint brace 1 is connected to a frame (not shown), for example, to absorb vibration energy generated in the frame due to disturbance such as seismic motion or wind, and to resist external force received from the frame to increase the strength of the frame. It is used to improve or suppress the deformation of the frame. The buckling restraint brace 1 is not limited to the term used, and can be used not only as a brace or a cane, but also connected vertically or horizontally to the frame. can.

The brace body 2 is a member that absorbs at least a part of the vibration energy generated in the frame and / or resists an external force received from the frame. The brace body 2 absorbs at least a part of the vibration energy generated in the frame by yielding (plastic deformation) when, for example, a predetermined or higher tensile stress or compressive stress is applied in the extending direction X of the brace body 2. Since buckling is suppressed by the brace stiffening member 3 as described later, the brace body 2 can stably repeat plastic deformation and absorb a relatively large vibration energy. Further, the brace body 2 resists an external force received from the frame by maintaining its shape within the elastic deformation range when, for example, a tensile stress or a compressive stress of a predetermined value or less is applied in the extending direction X of the brace body 2. .. Since buckling of the brace main body 2 is suppressed by the brace stiffening member 3, it is possible to maintain the strength of the brace main body 2 in the extending direction X and resist a relatively large external force.

In the present embodiment, as shown in FIGS. 1A to 1C, the brace main body 2 is allowed to move relative to the brace stiffening member 3 at least along the extending direction X of the brace main body 2. It is attached so that. In the present embodiment, as is often seen in FIG. 1 (c), the brace main body 2 is sandwiched between a pair of brace stiffening members 3a and 3b constituting the brace stiffening member 3, and is sandwiched by the brace stiffening member 3. It is attached. A known unbonded material 4 such as a phenol-based resin or Teflon (registered trademark) may be provided between the brace body 2 and the brace stiffening member 3. By providing the unbonded material 4, the brace body 2 can easily move relative to the brace stiffening member 3.

Both ends of the brace body 2 in the extending direction X of the brace body 2 are directly or indirectly connected to each of two constituent members (for example, columns or beams) provided apart from each other in a frame (not shown). In the present embodiment, both ends of the brace body 2 are indirectly connected to the constituent members of the frame via the brace body side connecting member 7, the extension member 6, and the extension member side connecting member 8, which will be described later. However, both ends of the brace body 2 are not limited to this embodiment, and may be directly connected to the constituent members of the frame.

In the present embodiment, the brace body 2 has a substantially rectangular plate shape as shown in FIGS. 1A to 1C, and the surface of the plate surface is substantially perpendicular to the extending direction X of the brace body 2. It is formed to do. Since the brace body 2 is formed in a plate shape, the bending rigidity in the direction facing the plate surface is relatively small compared to the bending rigidity in the other directions, and the brace body 2 preferentially buckles in the direction facing the plate surface. It's getting easier. Further, the brace body 2 protrudes from the end of the brace stiffening member 3 longer than the brace stiffening member 3 in the extending direction X of the brace body 2, and the brace compensating in a direction substantially perpendicular to the extending direction X of the brace body 2. It is formed to be shorter than the rigid member 3 and have a size that fits inside the brace stiffening member 3. However, the brace body 2 is not particularly limited as long as it is formed so as to extend in one direction X, and is formed into another shape or size, for example, a prismatic shape or a columnar shape. You may.

The brace body 2 may be configured to yield preferentially over other members subjected to the same stress when, for example, a predetermined or higher tensile stress or compressive stress is applied in the extending direction X of the brace body 2. can. For that purpose, the brace body 2 can be formed of, for example, low yield point steel. A low yield point steel is a steel material having a lower carbon content and a lower yield point than ordinary steel. For example, a steel material having a strength of 225 N / mm ² or less and extremely high ductility. pointing. However, the brace body 2 is particularly limited as long as it is made of a material that yields preferentially over other components of the buckling restraint brace 1 and components of the frame to be connected for the above purpose. It may be formed of, for example, aluminum or lead.

Further, the brace body 2 can be configured so that the shape can be maintained within the elastic deformation range when, for example, a tensile stress or a compressive stress of a predetermined value or less is applied in the extending direction X of the brace body 2. .. For that purpose, the brace body 2 can be made of, for example, ordinary steel. However, the brace body 2 can be appropriately selected as a constituent material according to the required strength for the above purpose, and may be formed of a higher strength material such as high-strength steel.

The brace stiffening member 3 is a member that suppresses buckling of the brace body 2. As shown in FIGS. 1A to 1C, the brace stiffening member 3 is provided on both sides in a direction substantially perpendicular to the extending direction X of the brace body 2 so as to suppress buckling of the brace body 2. It will be provided. In the present embodiment, the brace stiffening member 3 is arranged on both sides of the brace body 2 in the weak axis direction (that is, both sides of the plate surface of the brace body 2 formed in a plate shape) in which the bending rigidity is relatively small. A pair of brace stiffening members 3a and 3b are provided, and the pair of brace stiffening members 3a and 3b sandwich the brace body 2 from both sides in the weak axis direction, thereby suppressing buckling of the brace body 2 in the weak axis direction. .. The brace stiffening member 3 may be provided at least on both sides of the brace main body 2 in the weak axis direction, and the configuration and arrangement can be appropriately changed according to the shape of the brace main body 2.

In the present embodiment, each of the pair of brace stiffening members 3a and 3b constituting the brace stiffening member 3 is formed in a columnar shape having a substantially rectangular cross section extending along the extending direction X of the brace body 2. The pair of brace stiffening members 3a and 3b are arranged so that their respective surfaces come into direct or indirect surface contact with the plate surface of the brace body 2. However, the shape and arrangement of the brace stiffening member 3 is not particularly limited as long as it is configured to suppress the buckling of the brace body 2, and for example, the brace stiffening member 3a and 3b of the pair of brace stiffening members 3a and 3b. Each may be formed in a semi-cylindrical shape, or a pair of brace stiffening members 3a and 3b configured as separate bodies may be integrally formed.

The brace stiffening member 3 is made of a wooden material having strength capable of suppressing buckling of the brace body 2. The brace stiffening member 3 is not particularly limited as long as it is made of a wooden material, and can be formed of, for example, an laminated lumber in which a plurality of plates are laminated with an adhesive or a single solid wood. Since the buckling restraint brace 1 uses a wooden brace stiffening member 3 as a member for suppressing buckling of the brace body 2, it can be reduced in weight, is easy to handle, and can be applied to a wooden structure. Also suitable for application.

The buckling restraint brace 1 further includes a fiber reinforcing member 5 including reinforcing fibers 5a, as shown in FIGS. 1 (a) to 1 (c). The fiber reinforcing member 5 including the reinforcing fiber 5a is fixed to the surface of the brace stiffening member 3 so as to suppress buckling of the brace body 2. By fixing the fiber reinforcing member 5 to the surface of the brace stiffening member 3, the restraining force against buckling of the brace main body 2 by the brace stiffening member 3 is strengthened. In the present embodiment, the fiber reinforcing member 5 is a fiber reinforcing sheet 5 containing reinforcing fibers 5a extending in at least one direction. The fiber reinforced sheet 5 is provided around the brace stiffening member 3 so that the extending direction of the reinforcing fiber 5a of the fiber reinforced sheet 5 intersects the extending direction X of the brace body 2 (substantially orthogonal to the illustrated example). It is wrapped and fixed. Since the fiber reinforced sheet 5 has a very large tensile strength in the extending direction of the reinforcing fiber 5a, the brace stiffening is performed so that the extending direction of the reinforcing fiber 5a intersects the extending direction X of the brace body 2. By being wound around the member 3 and fixed, the pair of brace stiffening members 3a and 3b that sandwich the brace body 2 can be more firmly fixed to each other, and the brace body 2 tries to buckle. Since the deformation of the pair of brace stiffening members 3a and 3b can be suppressed at times, the restraining force against buckling of the brace main body 2 by the brace stiffening member 3 can be strengthened. Therefore, it is not necessary to increase the size of the pair of brace stiffening members 3a and 3b in order to give the pair of brace stiffening members 3a and 3b strength for suppressing buckling of the brace body 2, and also the pair of brace stiffening members 3a and 3b. Since fixing means such as bolts and nuts for fixing the brace stiffening members 3a and 3b to each other can be omitted, it is not necessary to increase the size of the pair of brace stiffening members 3a and 3b in order to provide the fixing means. The brace stiffening member 3 can be miniaturized, whereby the buckling restraint brace 1 can be further miniaturized and lightened. However, the fiber reinforcing member is not limited to this embodiment as long as it is fixed to the surface of the brace stiffening member 3 so as to suppress buckling of the brace body 2. The fiber reinforced member may have, for example, a configuration as shown in the buckling restraint brace 200 of the third embodiment described below, or may have a configuration according to the present embodiment and a configuration according to the third embodiment. It may have a combined configuration.

The fiber reinforcing sheet 5 may or may not contain the reinforcing fiber 5a extending in at least one direction that needs to be strengthened, and may or may not contain the reinforcing fiber extending in the other direction. Further, the fiber reinforced sheet 5 is formed in a sheet shape, is relatively thin and has high flexibility as compared with the case where it is formed in a plate shape as described later, and can be wound around the brace stiffening member 3. It has the flexibility to be able to.

As the reinforcing fiber 5a contained in the fiber reinforcing sheet 5, for example, carbon fiber, para-aramid fiber, meta-based aramid fiber, glass fiber, polyester fiber, polyolefin fiber, boron fiber, azole fiber, alumina fiber and the like can be used. However, it is preferable to use carbon fiber or aramid fiber having excellent specific strength and specific elasticity, and it is more preferable to use carbon fiber.

The fiber reinforced sheet 5 can be fixed to the brace stiffening member 3 with, for example, an adhesive. As the adhesive, known adhesives such as epoxy resin, unsaturated polyester resin, phenol resin, vinyl ester resin, and methacrylic (MMA) resin can be used, and among them, epoxy resin is preferably used. However, if the fiber reinforced sheet 5 can maintain a fixed state with respect to the pair of brace stiffening members 3a and 3b when a force is applied to the pair of brace stiffening members 3a and 3b in a direction away from each other. , Is not particularly limited, and may be fixed by other fixing means.

In the present embodiment, as shown in FIGS. 1A and 1B, two fiber-reinforced sheets 5 are provided on both ends of the pair of brace stiffening members 3a and 3b in the extending direction X of the brace body 2. Has been done. However, the fiber reinforced sheet 5 is not particularly limited as long as the pair of brace stiffening members 3a and 3b can be fixed to each other and buckling of the brace body 2 can be suppressed, and the brace body 2 extends. The size may be such that the entire pair of brace stiffening members 3a and 3b in the direction X can be wound by one, or the size may be such that three or more of them can be wound. Further, in the present embodiment, the fiber reinforced sheet 5 is wound around the entire circumference of the pair of brace stiffening members 3a and 3b as shown in FIG. 1 (c), but the pair of brace stiffening members 3a and 3b. May be wound around a part of the pair of brace stiffening members 3a and 3b as long as they can be fixed to each other and buckling of the brace body 2 can be suppressed.

In the present embodiment, the buckling restraint brace 1 is further connected to the end portion of the brace body 2 in the extending direction X of the brace body 2 as shown in FIGS. 1A and 1B, and the brace body 2 is connected to the end portion of the brace body 2. It includes a wooden extension member 6 that extends along the extension direction X. The extension member 6 is a member for extending the length of the buckling restraint brace 1 without extending the brace body 2. One end of the extension member 6 is connected to the end of the brace body 2, the other end is connected to the component of the frame, and the brace body 2 and the component of the frame are connected. Since the buckling restraint brace 1 can be lengthened by a wooden extension member 6, the brace body 2 can be lengthened even when the distance between the two components of the frame to be connected is large. There is no need to do this, and the weight can be reduced as a whole. If the brace body 2 is lengthened, a larger stiffening ability is required and the brace stiffening member 3 needs to have a large cross section, so that the weight of the entire buckling restraint brace 1 increases. However, in the present embodiment, since the overall length of the buckling restraint brace 1 can be lengthened by the wooden extension member 6 without lengthening the brace body 2, the brace body 2 can be lengthened as compared with the case where the brace body 2 is lengthened. Since it is not necessary to increase the cross section of the brace stiffening member 3, the buckling restraint brace 1 as a whole can be reduced in weight. Further, in the present embodiment, the extension member 6 can be handled as a separate body from the brace main body 2 as described later, and is configured to be connected to the brace main body 2 even at the construction site, so that buckling restraint is performed. It is easy to carry and handle the brace 1 to the construction site. Although the extension member 6 is connected to both ends of the brace body 2 in the present embodiment, it may be connected to only one end of the brace body 2.

In the present embodiment, the extension member 6 is formed in a columnar shape having a substantially rectangular cross section extending along the extending direction X of the brace body 2, and is formed in a cross section having substantially the same size as the brace stiffening member 3. However, the shape of the extension member 6 is not particularly limited as long as it is formed so as to extend along the extending direction X of the brace body 2, and the shape of the extension member 6 is the shape of the frame in which the buckling restraint brace 1 is installed. It can be changed as appropriate. Since the extension member 6 is made of wood and is easy to process, the buckling restraint brace 1 of the present embodiment can be easily adapted to a frame having various shapes.

The extension member 6 may have enough strength to maintain a connected state between the brace body 2 and the constituent members of the frame when the buckling restraint brace 1 receives an external force, and the constituent materials are particularly limited. There is no such thing. The extension member 6 may be formed of, for example, the same wooden material as the brace stiffening member 3, or may be formed of a different wooden material.

The method of connecting the extension member 6 to the brace body 2 is particularly limited as long as the connection state between the extension member 6 and the brace body 2 can be maintained when the buckling restraint brace 1 receives an external force. There is no. In the present embodiment, the extension member 6 is connected to the brace body 2 by the brace body side connecting member 7 fixed to the end portion of the brace body 2 as shown in FIGS. 1A and 1B. Further, as for the method of connecting the extension member 6 to the constituent members of the frame, it is sufficient that the connection state between the extension member 6 and the constituent members of the frame can be maintained when the buckling restraint brace 1 receives an external force. There is no limitation. In the present embodiment, as shown in FIGS. 1A and 1B, in order to connect the end portion of the extension member 6 to the constituent member of the frame, the extension member side connection member 8 is connected to the end portion of the extension member 6. Is provided.

The brace body side connecting member 7 extends substantially parallel to the extending direction X of the brace body 2 and extends substantially perpendicular to the connecting portion 7a fixed to the extension member 6 and the extending direction X of the brace body 2. A flange portion 7b that abuts on an end portion of the extension member 6 is provided. In the brace body side connecting member 7, the connecting portion 7a side is fixed to the end portion of the extension member 6, and the flange portion 7b side is fixed to the end portion of the brace body 2. The brace body side connecting member 7 is fixed to the brace body 2 by fixing the flange portion 7b of the brace body side connecting member 7 and the end portion of the brace body 2 by a known fixing means such as welding. To fix the brace body side connecting member 7 to the extension member 6, the connecting portion 7a of the brace body side connecting member 7 is an extension member until the flange portion 7b of the brace body side connecting member 7 abuts on the end portion of the extension member 6. It is inserted inside the 6 and the connecting portion 7a is fixed to the extension member 6 by a fixing means 9 such as a known bolt 9a and a nut 9b. The connection portion 7a is fixed to the extension member 6 in a state where the flange portion 7b of the brace body side connection member 7 is in contact with the end portion of the extension member 6, so that the connection portion 7a is perpendicular to the extension direction X of the brace body 2. Since the bending of the brace body side connecting member 7 is suppressed, the brace body side connecting member 7 can be more firmly fixed to the extension member 6. Further, since the extension member 6 can be connected to the brace body 2 via the brace body side connecting member 7 by using the fixing means 9 such as the bolt 9a and the nut 9b, the buckling restraint brace 1 can be easily assembled at the construction site. Can be done. Further, since the extension member 6 can be carried into the construction site separately from the brace main body 2 and the brace stiffening member 3, the buckling restraint brace 1 can be easily carried into the construction site. The connecting portion 7a of the brace body side connecting member 7 is formed in a substantially rectangular plate shape in the present embodiment, but is formed so as to extend substantially parallel to the extending direction X of the brace body 2. It may be, for example, substantially cylindrical or substantially prismatic. Further, in the present embodiment, the flange portion 7b of the brace body side connecting member 7 has a substantially rectangular plate shape, and is formed to have substantially the same size as the cross section of the brace stiffening member 3 and the extension member 6. It may be formed so as to expand substantially perpendicular to the extending direction X of the brace body 2, and may be formed larger or smaller than the cross section of the brace stiffening member 3 and the extension member 6, for example.

The brace body side connecting member 7 may have enough strength to maintain a connected state between the brace body 2 and the extension member 6 when the buckling restraint brace 1 receives an external force, and the material to be composed is particularly high. Not limited. The brace body side connecting member 7 is, for example, a material that does not plastically deform before the brace body 2 plastically deforms when the buckling restraint brace 1 receives an external force, more specifically, than the brace body 2. It can be formed from a material with a high yield point. The brace body side connecting member 7 can be formed of, for example, ordinary steel having a higher yield point than the low yield point steel when the brace body 2 is made of low yield point steel. Further, the brace body side connecting member 7 is formed of, for example, a material having strength to maintain the shape within elastic deformation when a tensile stress or a compressive stress of a predetermined value or less is applied in the extending direction X of the brace body 2. Can be done. The brace body side connecting member 7 may be formed of, for example, ordinary steel having the same strength or high-strength steel having higher strength when the brace body 2 is made of ordinary steel. can.

As shown in FIGS. 1A and 1B, the extension member side connecting member 8 has a connecting portion 8a extending substantially parallel to the extending direction X of the brace body 2 and an extending direction X of the brace body 2. On the other hand, it includes a flange portion 8b that expands substantially vertically, and a connection end portion 8c that extends substantially parallel to the extending direction X of the brace body 2. In the extension member side connection member 8, the connection portion 8a side is fixed to the end portion of the extension member 6, and the connection end portion 8c side is fixed to the constituent member of the frame. The fixing of the extension member side connecting member 8 to the extension member 6 is performed in the same manner as the fixing of the brace body side connecting member 7 to the extension member 6 described above, and is performed to the constituent members of the frame of the extension member side connecting member 8. Is fixed by fixing the connection end portion 8c to the constituent members of the frame by a known fixing means such as bolts and nuts. The extension member side connection member 8 can have the same configuration as the brace body side connection member 7 described above, except for the connection end portion 8c. The connection end portion 8c of the extension member side connection member 8 is formed in a substantially plate shape in the present embodiment, but may be configured to extend substantially parallel to the extension direction X of the brace body 2. For example, it may be substantially columnar or substantially prismatic.

The extension member side connection member 8 may have enough strength to maintain the connection state between the extension member 6 and the constituent members of the frame when the buckling restraint brace 1 receives an external force, and the constituent material is Not particularly limited. The extension member side connecting member 8 may be formed of the same material as the brace body side connecting member 7, or may be formed of a material different from the brace body side connecting member 7.

In the present embodiment, as shown in FIGS. 1A and 1B, a distance between the brace stiffening member 3 and the flange portion 7b of the brace body side connecting member 7 in the extending direction X of the brace body 2 is provided. S is provided. Therefore, when the buckling restraint brace 1 receives an external force that vibrates in the extending direction X of the brace body 2, the flange portion 7b of the brace body side connecting member 7 can move relative to the brace stiffening member 3. Therefore, the brace body 2 fixed to the flange portion 7b can move relative to the brace stiffening member 3, and can absorb vibration energy by repeating plastic deformation. The interval S is the flange portion of the brace body side connecting member 7 so that the brace body 2 is plastically deformed in the brace stiffening member 3 when the brace body 2 is subjected to a predetermined or higher compressive stress along the extending direction X of the brace body 2. As long as 7b has a size that allows relative movement with respect to the brace stiffening member 3, the size is not particularly limited, but the size is such that buckling of the brace body 2 is suppressed within the interval S. Is preferable.

In the present embodiment, the space S is provided with a cushioning material 10 that can be expanded and contracted as the space S expands and contracts in the extending direction X of the brace body 2, as shown in FIGS. 1 (a) and 1 (b). There is. When the buckling restraint brace 1 is not subjected to an external force and the interval S is maintained in the original state, the cushioning material 10 is provided with the brace stiffening member 3 and the flange portion 7b of the brace body side connecting member 7. It is maintained at the size of the original spacing S between the spaces, and when the buckling restraint brace 1 receives an external force and the spacing S expands and contracts, it is configured to expand and contract as the spacing S expands and contracts. The cushioning material 10 can be formed by using, for example, a known sealing material or the like. By providing the cushioning material 10 at the interval S, even if an unexpected external force is applied to the buckling restraint brace 1, it is possible to prevent the members on both sides of the cushioning material 10 from colliding with each other and being damaged. However, the interval S may be formed as a space as in the buckling restraint brace 100 of the second embodiment described later, without the cushioning material 10 being provided.

<Second Embodiment>
2 (a) to 2 (c) show the buckling restraint brace 100 of the second embodiment. In FIGS. 2A to 2C, the same or corresponding components as those of the buckling restraint brace 1 of the first embodiment are designated by the same reference numerals. Hereinafter, only the configuration different from the buckling restraint brace 1 of the first embodiment will be described.

The buckling restraint brace 100 of the second embodiment basically has a configuration similar to that of the buckling restraint brace 1 of the first embodiment, but as is often seen in FIG. 2 (c). , The configuration around the interval S is different from the configuration of the buckling restraint brace 1 of the first embodiment. In the present embodiment, the flange portion 7b of the brace body side connecting member 7 is formed in a cross section having a size smaller than the cross section of the brace stiffening member 3 and the extension member 6, and is formed at the end portion of the brace stiffening member 3. , A flange portion accommodating portion 3c capable of accommodating the flange portion 7b of the brace body side connecting member 7 is provided. The flange portion accommodating portion 3c is formed as a recess recessed inward from the end portion of the brace stiffening member 3 in the extending direction X of the brace body 2. The flange portion accommodating portion 3c is formed to have a size corresponding to the flange portion 7b or a size slightly larger than the flange portion 7b. In the present embodiment, the interval S is configured as a space between the flange portion 7b of the brace body side connecting member 7 and the bottom surface of the flange portion accommodating portion 3c of the brace stiffening member 3. Since the brace stiffening member 3 includes the flange portion accommodating portion 3c, when the extension member 6 and the brace main body side extension member 7 move to the brace main body 2 and the brace stiffening member 3, the flange portion 7b becomes a branded portion. Since it is accommodated in the accommodating portion 3c, it is possible to suppress the movement of the flange portion 7b in the direction perpendicular to the extending direction X of the brace main body 2 and further suppress the buckling of the brace main body 2. .. Although the space S is configured as a space in the present embodiment, a cushioning material may be provided as in the buckling restraint brace 1 of the first embodiment.

<Third Embodiment>
3 (a) to 3 (c) show the buckling restraint brace 200 of the third embodiment. In FIGS. 3A to 3C, the same or corresponding components as those of the buckling restraint brace 1 of the first embodiment are designated by the same reference numerals. Hereinafter, only the configuration different from the buckling restraint brace 1 of the first embodiment will be described.

The buckling restraint brace 200 of the third embodiment basically has a configuration similar to that of the buckling restraint brace 1 of the first embodiment, but it is often seen in FIGS. 3 (a) to 3 (c). As can be seen, it differs from the configuration of the buckling restraint brace 1 of the first embodiment in that the fiber reinforced plate 11 is mainly used as the fiber reinforced member.

In the present embodiment, the pair of brace stiffening members 3a and 3b are fixed to each other by fixing means 12 such as bolts 12a and nuts 12b, and the fiber reinforcing members are attached to the surfaces of the pair of brace stiffening members 3a and 3b. By fixing the eleven, the buckling of the brace body 2 is suppressed. In the present embodiment, the fiber reinforcing member 11 is a fiber reinforcing plate 11 including reinforcing fibers 11a extending in at least one direction. The fiber reinforcing plate 11 has a brace stiffening member 3 (a pair of brace stiffening members 3a, 3b) so that the extending direction of the reinforcing fiber 11a of the fiber reinforcing plate 11 is substantially parallel to the extending direction X of the brace body 2. ) Is fixed on the surface. The fiber reinforced plate 11 strengthens the bending rigidity of the brace stiffening member 3 and strengthens the restraining force of the brace stiffening member 3 against buckling of the brace body 2. Since the fiber reinforcing plate 11 has a very large tensile strength in the extending direction of the reinforcing fiber 11a, the fiber reinforcing plate 11 is paired so that the extending direction of the reinforcing fiber 11a is substantially parallel to the extending direction X of the brace body 2. By being fixed to the surface of the brace stiffening members 3a and 3b, the pair of brace stiffening members 3a and 3b are perpendicular to the extending direction X of the brace body 2 (in the vertical direction in FIG. 3B). When trying to bend, the fiber reinforced plate 11 fixed to the outer surface of the portion to be bent suppresses the bending, so that a pair of braces in the direction perpendicular to the extending direction X of the brace body 2 The bending rigidity of the stiffening members 3a and 3b can be enhanced. By fixing and integrating the fiber reinforced plates 11 to the pair of brace stiffening members 3a and 3b, the bending rigidity of the pair of brace stiffening members 3a and 3b can be strengthened. It is not necessary to increase the cross section of the pair of brace rigid members 3a and 3b, but rather the pair of brace rigid members 3a and 3b can be miniaturized, and the buckling restraint brace 1 can be further miniaturized and lightened. Can be done. In the present embodiment, the fiber reinforced plates 11 are fixed to both sides of the brace stiffening member 3 in the direction in which the plate surface of the brace body 2 faces, but the brace supplementing so as to suppress the buckling of the brace body 2. As long as it is fixed to the surface of the rigid member 3, the configuration and arrangement can be appropriately changed according to the shape of the brace body 2 without particular limitation.

The fiber reinforcing plate 11 may or may not contain the reinforcing fiber 11a extending in at least one direction that needs to be strengthened, and may or may not contain the reinforcing fiber extending in the other direction. Further, the fiber reinforced plate 11 is formed in a plate shape containing, for example, a thermosetting resin, and is relatively thick and has high rigidity as compared with the case where the fiber reinforced plate 11 is formed in a sheet shape as described above. The fiber reinforced plate 11 is formed into a plate shape by pre-curing high-density reinforcing fibers with a thermosetting resin at a manufacturing plant or the like, thereby achieving high rigidity and high tensile strength due to high-density reinforcing fibers. It can be realized.

As the reinforcing fiber 11a contained in the fiber reinforcing plate 11, for example, carbon fiber, para-aramid fiber, meta-based aramid fiber, glass fiber, polyester fiber, polyolefin fiber, boron fiber, azole fiber, alumina fiber and the like can be used. However, it is preferable to use carbon fiber or aramid fiber having excellent specific strength and specific elasticity, and it is more preferable to use carbon fiber.

As the thermosetting resin contained in the fiber reinforced plate 11, for example, epoxy resin, unsaturated polyester resin, phenol resin, vinyl ester resin, methacrylic (MMA) resin and the like can be used, but among them, epoxy resin is preferable. Used.

The fiber reinforced plate 11 can be fixed to the brace stiffening member 3 with, for example, an adhesive. As the adhesive, known adhesives such as epoxy resin, unsaturated polyester resin, phenol resin, vinyl ester resin, and methacrylic (MMA) resin can be used, and among them, epoxy resin is preferably used. However, the fiber reinforced plate 11 is not particularly limited as long as it can maintain the fixed state to the brace stiffening member 3 when bending stress is applied to the brace stiffening member 3, and other fixing means. May be fixed by.

In this embodiment, the fiber reinforced plate 11 is fixed to the outer surface of the pair of brace stiffening members 3a and 3b as shown in FIGS. 3A to 3C. However, the fiber reinforced plate 11 is not limited to the present embodiment as long as the bending rigidity of the pair of brace stiffening members 3a and 3b can be strengthened and the restraining force against buckling of the brace body 2 can be strengthened. For example, it may be fixed to the inner surface (brace body 2 side) of the pair of brace rigid members 3a and 3b. Further, the length of the fiber reinforced plate 11 in the extending direction X of the brace body 2 is not particularly limited, but as shown in the figure, in order to secure a long fixing length and further suppress the buckling of the brace body 2. , It is preferable that the length extends over the entire length of the pair of brace stiffening members 3a and 3b.

1,100,200 Buckling restraint brace 2 Brace body 3 Brace stiffening member 3a, 3b Pair of brace stiffening member 3c Flange accommodating part 4 Unbonded material 5 Fiber reinforced member (fiber reinforced sheet)
5a Reinforcing fiber 6 Extension member 7 Brace body side connection member 7a Connection part 7b Flange part 8 Extension member side connection member 8a Connection part 8b Flange part 8c Connection end part 9 Fixing means 9a Bolt 9b Nut 10 Cushioning material 11 Fiber reinforcement member (fiber) Reinforced plate)
11a Reinforcing fiber 12 Fixing means 12a Bolt 12b Nut S Interval X Direction of extension of brace body

Claims (8)

The brace body that extends in one direction and
A seat that extends along the extending direction of the brace body and is provided with wooden brace stiffening members provided on both sides in a direction substantially perpendicular to the extending direction of the brace body so as to suppress buckling of the brace body. It ’s a buckling restraint brace,
A fiber reinforcing member containing reinforcing fibers is fixed to the surface of the brace stiffening member so as to suppress buckling of the brace body.
The fiber reinforced member is a fiber reinforced plate containing reinforcing fibers extending in at least one direction.
The fiber-reinforced plate is fixed to the surface of the brace stiffening member so that the extending direction of the reinforcing fibers of the fiber-reinforced plate is substantially parallel to the extending direction of the brace body. Buckling restraint brace. The brace body that extends in one direction and
With wooden brace stiffening members provided on both sides in a direction substantially perpendicular to the extending direction of the brace body so as to extend along the extending direction of the brace body and suppress buckling of the brace body.
A buckling restraint brace with
A fiber reinforcing member containing reinforcing fibers is fixed to the surface of the brace stiffening member so as to suppress buckling of the brace body.
The buckling restraint brace is further connected to the end of the brace body in the extending direction of the brace body and comprises a wooden extension member extending along the extending direction of the brace body. .. The fiber reinforced member is a fiber reinforced sheet containing reinforcing fibers extending in at least one direction.
The fiber-reinforced sheet is characterized in that it is wound and fixed around the brace stiffening member so that the extending direction of the reinforcing fiber of the fiber-reinforced sheet intersects with the extending direction of the brace body. The buckling restraint brace according to claim 2 . The fiber reinforcing member is a fiber reinforcing plate containing reinforcing fibers extending in at least one direction.
The fiber-reinforced plate is characterized in that it is fixed to the surface of the brace stiffening member so that the extending direction of the reinforcing fibers of the fiber-reinforced plate is substantially parallel to the extending direction of the brace body. The buckling restraint brace according to Item 2 . 1 . Buckling restraint brace. The extension member is connected to the brace body by a brace body side connecting member fixed to the end of the brace body.
The brace body-side connecting member extends substantially parallel to the extending direction of the brace body and expands substantially perpendicular to the connecting portion fixed to the extension member and the extending direction of the brace body. The buckling restraint brace according to any one of claims 2 to 5, further comprising a flange portion that abuts on an end portion of the member. In the extending direction of the brace body, a gap is provided between the brace stiffening member and the flange portion of the brace body side connecting member.
The buckling restraint brace according to claim 6 , wherein a cushioning material that can be expanded and contracted as the interval expands and contracts in the extending direction of the brace body is provided at the interval. The buckling restraint brace according to claim 6 or 7 , wherein a flange portion accommodating portion capable of accommodating the flange portion of the brace body side connecting member is provided at an end portion of the brace stiffening member.

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