Wooden buckling reinforcement brace

Abstract

To prevent an end of a flange of a brace core from being pushed in against an inner surface of a wooden cylindrical body, in a wooden buckling reinforcement brace formed by surrounding the brace core formed of H-shaped steel with the wooden cylindrical body.SOLUTION: A wooden buckling reinforcement brace 20 comprises: a brace core 30 formed of H-shaped steel; a wooden cylindrical body 40 surrounding the brace core 30; and a cover material 50 covering an end face 32E of a flange 32 of the brace core 30.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a wood buckling stiffening brace. [Background technology]

[0002] A buckling stiffening brace is known in which a core material is surrounded by wooden restraint members joined in a cylindrical shape with long bolts (see, for example, Patent Document 1).

[0003] Also, a buckling stiffening brace has been disclosed in which a steel material is sandwiched between a plurality of stiffening materials made of wood (see Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-147781 [Patent Document 2] JP 2020-148032 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when a brace core made of H-shaped steel is surrounded by a wooden tubular body formed into a cylindrical shape using wood material, if the brace core attempts to buckle during an earthquake, for example, the end of the flange portion of the brace core may sink into the inner surface of the wooden tubular body, which may reduce the restraining force of the wooden tubular body on the brace core.

[0006] Taking into consideration the above-mentioned facts, the present invention aims to prevent the end of the flange portion of the brace core from sinking into the inner surface of the wooden tubular body in a wooden buckling stiffening brace in which a brace core formed from H-shaped steel is surrounded by a wooden tubular body. [Means for solving the problem]

[0007] The wood buckling stiffening brace described in claim 1 comprises a brace core formed from H-shaped steel, a wood cylindrical body surrounding the brace core, and a cover material covering the end faces of the flange portions of the brace core.

[0008] According to the wood buckling stiffening brace of claim 1, the brace core is formed of an H-shaped steel. The brace core is surrounded by a wooden tubular body. This enhances the design of the buckling stiffening brace. During an earthquake, the wooden tubular body restrains the brace core from buckling. Therefore, buckling of the brace core is suppressed.

[0009] Furthermore, the end faces of the flange portions of the brace cores are covered with a cover material. As a result, when the brace cores attempt to buckle during an earthquake, the end faces of the flange portions of the brace cores come into contact with the inner surface of the wooden tubular body via the cover material. As a result, the brace cores are prevented from sinking into the inner surface of the wooden tubular body. Therefore, buckling of the brace cores is prevented. Furthermore, damage to the inner surface of the wooden tubular body is also prevented.

[0010] The wood buckling stiffening brace described in claim 2 is the wood buckling stiffening brace described in claim 1, in which the cover material is formed into a C-shaped cross section and covers the end faces of the flange portions when placed over the flange portions of the brace core material.

[0011] According to the wood buckling stiffening brace of claim 2, the cover material is formed to have a C-shaped cross section. This cover material covers the end face of the flange portion when placed over the flange portion of the brace core material.

[0012] As a result, when the brace core tries to buckle during an earthquake, the end face of the flange of the brace core comes into contact with the inner surface of the wooden tube through the cover material. As a result, the brace core is prevented from sinking into the inner surface of the wooden tube. Therefore, buckling of the brace core is prevented. Furthermore, damage to the inner surface of the wooden tube is also prevented.

[0013] In addition, by covering the flange portion of the brace core member with the cover material, the end face of the flange portion can be easily covered with the cover material, thereby improving the workability of the cover material.

[0014] The wood buckling stiffening brace described in claim 3 is the wood buckling stiffening brace described in claim 1, in which the cover material has a pair of plate-shaped portions connected in an L-shape, one of the plate-shaped portions being attached to the outer surface of the flange portion and the other of the plate-shaped portions facing the end face of the flange portion.

[0015] According to the wood buckling stiffening brace of claim 3, the cover material has a pair of plate-shaped parts connected in an L-shape. One plate-shaped part of the cover material is attached to the outer surface of the flange part of the brace core. The other plate-shaped part of the cover material faces the end face of the flange part of the brace core and covers the end face.

[0016] As a result, when the brace core tries to buckle during an earthquake, the end face of the flange of the brace core comes into contact with the inner surface of the wooden tube through the other plate-shaped part of the cover material. As a result, the brace core is prevented from sinking into the inner surface of the wooden tube. Therefore, buckling of the brace core is prevented. Furthermore, damage to the inner surface of the wooden tube is also prevented.

[0017] In addition, by attaching one plate-shaped portion of the cover material to the outer surface of the flange portion of the brace core material, the end face of the flange portion can be easily covered by the other plate-shaped portion of the cover material, thereby improving the workability of the cover material.

[0018] The wood buckling stiffening brace described in claim 4 is a wood buckling stiffening brace described in any one of claims 1 to 3, in which the wood tubular body is arranged in a rectangular tube shape when viewed in cross section, has a plurality of wood stiffening plates surrounding the brace core, and the ends of adjacent wood stiffening plates are joined at the corners of the wood tubular body with an adhesive, or an adhesive and a screw member.

[0019] According to the wood buckling stiffening brace of claim 4, the wooden tubular body has multiple wood stiffening plates. The multiple wood stiffening plates are arranged in a rectangular tubular shape in cross section and surround the brace core. Furthermore, the ends of adjacent wood stiffening plates are joined to each other at the corners of the wooden tubular body with an adhesive, or an adhesive and a screw member.

[0020] By joining the ends of adjacent wooden stiffening plates together with adhesive or adhesive and screws in this way, the rigidity of the wooden tubular body can be easily increased, thereby increasing the buckling restraint force of the wooden tubular body on the brace core material. Effect of the Invention

[0021] As described above, according to the present invention, in a wood buckling stiffening brace in which a brace core formed from H-shaped steel is surrounded by a wood tubular body, it is possible to prevent the ends of the flange portions of the brace core from sinking into the inner surface of the wood tubular body. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is an elevation view showing a frame provided with a wood buckling stiffening brace according to one embodiment. [Diagram 2] 2 is a cross-sectional view taken along line 2-2 of FIG. 1. [Diagram 3] FIG. 3 is a partially enlarged cross-sectional view of FIG. [Figure 4] FIG. 3 is a cross-sectional view corresponding to FIG. 2 and showing a modified example of a wood buckling stiffening brace according to one embodiment. [Diagram 5] FIG. 3 is a cross-sectional view corresponding to FIG. 2 and showing a modified example of a wood buckling stiffening brace according to one embodiment. [Figure 6] FIG. 3 is a cross-sectional view corresponding to FIG. 2 and showing a modified example of a wood buckling stiffening brace according to one embodiment. [Figure 7] FIG. 3 is a cross-sectional view corresponding to FIG. 2 and showing a modified example of a wood buckling stiffening brace according to one embodiment. [Figure 8] FIG. 3 is a cross-sectional view corresponding to FIG. 2 and showing a modified example of a wood buckling stiffening brace according to one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, a wood buckling stiffening brace according to one embodiment will be described with reference to the drawings.

[0024] (frame) 1 shows a frame 10 provided with a wood buckling stiffening brace 20 according to this embodiment. The frame 10 is a rigid frame including a pair of columns 12 and upper and lower beams 14 erected on the pair of columns 12. A wood buckling stiffening brace 20 is attached diagonally to this frame 10.

[0025] Specifically, the wood buckling stiffening brace 20 is disposed along a diagonal direction of the frame 10. A mounting bracket 22 is provided on each of both ends of the wood buckling stiffening brace 20 in the longitudinal direction.

[0026] Meanwhile, gusset plates 16 are provided at diagonal corners of the frame 10. Mounting brackets 22 of the wood buckling stiffening brace 20 are joined to these gusset plates 16 with shear pins. Note that the mounting brackets 22 are not limited to shear pins and may be joined to the gusset plates 16 with bolts, welding, or the like, for example.

[0027] Furthermore, the structural type of the frame 10 is not particularly limited, and may be reinforced concrete, steel-reinforced concrete, steel, wood, etc. The mounting structure of the wood buckling stiffening brace 20 to the frame 10 is not limited to the gusset plate 16 and mounting bracket 22, and can be changed as appropriate. Furthermore, the wood buckling stiffening brace 20 is not limited to a single-slope type, and may be, for example, a V-type, A-type, K-type, etc.

[0028] (Wood buckling brace) The wood buckling stiffening brace 20 includes a brace core 30, a wood tubular body 40, a plurality of cover materials 50 (see FIG. 2), and the two mounting brackets 22 described above.

[0029] (Brace core) The brace core 30 is a brace (brace body) that resists shear deformation of the frame 10 during an earthquake with tension and compression. The brace core 30 is arranged along the diagonal direction of the frame 10. In addition, both ends of the brace core 30 in the longitudinal direction are joined to the gusset plates 16 of the frame 10 via mounting brackets 22.

[0030] 2, the brace core 30 is formed of an H-shaped steel. The brace core 30 has a pair of flange portions 32 facing each other and a web portion 34 connecting the central portions of the pair of flange portions 32 in the width direction.

[0031] (Woody cylinder) The wooden tubular body 40 is a restraining member that restrains the buckling of the brace core material 30 during an earthquake. This wooden tubular body 40 has a pair of first wooden stiffening plates 42 and a pair of second wooden stiffening plates 44. The first wooden stiffening plates 42 and the second wooden stiffening plates 44 are formed of CLT (Cross Laminated Timber), for example.

[0032] The first wooden stiffening board 42 and the second wooden stiffening board 44 are not limited to CLT, and may be made of wood materials such as LVL, laminated lumber, etc. The first wooden stiffening board 42 and the second wooden stiffening board 44 are examples of wooden stiffening boards.

[0033] The pair of first wooden stiffening plates 42 and the pair of second wooden stiffening plates 44 are joined together in a rectangular tubular shape in a cross-sectional view. Specifically, the width W1 of the pair of first wooden stiffening plates 42 is wider than the width W2 of the pair of second wooden stiffening plates 44. The pair of first wooden stiffening plates 42 are disposed facing each other in a predetermined direction (the direction of the arrow Y) with the brace core material 30 in between.

[0034] On the other hand, the pair of second wooden stiffening plates 44 are arranged facing each other in a direction perpendicular to the predetermined direction (the direction of arrow X) with the brace core material 30 in between. The pair of second wooden stiffening plates 44 are also arranged between the ends of the pair of opposing first wooden stiffening plates 42. The ends of the adjacent first wooden stiffening plates 42 and second wooden stiffening plates 44 are joined to each other at the corners of the wooden cylindrical body 40 with an adhesive and screw members 46.

[0035] Specifically, both end faces 44E of the second wooden stiffening plate 44 are joined with an adhesive while being abutted against the inner faces (opposing faces) of a pair of opposing first wooden stiffening plates 42. The multiple screw members 46 are, for example, screws, and are arranged at intervals in the longitudinal direction of the wooden cylindrical body 40. Each screw member 46 is screwed into an end of the first wooden stiffening plate 42 and the end face 44E of the second wooden stiffening plate 44 from the outer surface side of the first wooden stiffening plate 42.

[0036] In this way, when viewed in cross section (horizontal cross section), the brace core material 30 is inserted inside a pair of first wooden stiffening plates 42 and a pair of second wooden stiffening plates 44 which are joined together in a rectangular tube shape.

[0037] Here, in this embodiment, the ends of adjacent first and second wood stiffening plates 42, 44 are butted against each other in a direction that intersects (in this embodiment, perpendicular or nearly perpendicular) with the buckling direction (arrow X direction) of the brace core material 30 in cross-sectional view, and are joined by adhesive and screw members 46.

[0038] This enables the screw member 46 to resist buckling due to its shear rigidity when the brace core 30 attempts to buckle (in the direction of arrow X) and the end face 32E of the flange portion 32 comes into contact with the inner surface 40S of the wooden cylindrical body 40 via the cover material 50 described later.

[0039] The positional relationship between the buckling direction of the brace core 30 and the joints of the first and second wooden stiffening plates 42 and 44 can be changed as appropriate. For example, the wooden tubular body 40 may be rotated 90 degrees with respect to the brace core 30 shown in Fig. 2. The first and second wooden stiffening plates 42 and 44 are not limited to being joined by adhesive and screw members 46, and may be joined by, for example, only adhesive, omitting the screw members 46. The first and second wooden stiffening plates 42 and 44 may be joined by one of the adhesive and screw members 46, or may be joined by a through bolt or the like.

[0040] (Cover material) The multiple cover materials 50 are protective members that cover the end faces 32E of the pair of flange portions 32 of the brace core 30, thereby preventing the end faces 32E from sinking into the inner surface 40S of the wooden tube 40.

[0041] Each cover material 50 is formed of an L-shaped steel, for example. That is, the cover material 50 is formed to have an L-shaped cross section. Each cover material 50 is arranged along a corner of the wooden cylindrical body 40 and attached to the outer surface 32A of the flange portion 32 of the brace core material 30.

[0042] 3, the cover material 50 has a pair of plate-shaped parts 50A, 50B connected in an L-shape in a cross-sectional view. Of the pair of plate-shaped parts 50A, 50B, one plate-shaped part 50A is joined by welding or the like to the outer surface 32A of the flange part 32 of the brace core material 30 via a spacer 36. This prevents the curved surfaces R formed at the corners of the pair of plate-shaped parts 50A, 50B from interfering with the ends of the flange part 32 of the brace core material 30.

[0043] Of the pair of plate-shaped portions 50A, 50B, the other plate-shaped portion 50B is disposed opposite the end face 32E of the flange portion 32 of the brace core 30, and covers the entire surface of the end face 32E. In other words, the other plate-shaped portion 50B is interposed between the end face 32E of the flange portion 32 of the brace core 30 and the inner peripheral surface 40S of the wooden tube 40.

[0044] In this embodiment, the spacers 36 and the cover materials 50 are provided at intervals in the longitudinal direction of the brace core material 30, but the number and arrangement of the spacers 36 and the cover materials 50 can be changed as appropriate. Also, the spacers 36 may be provided as necessary, and can be omitted as appropriate.

[0045] (action) Next, the operation of this embodiment will be described.

[0046] As shown in Fig. 2, in this embodiment, the brace core 30 is formed of an H-shaped steel. The brace core 30 is surrounded by a wooden tubular body 40. This enhances the design of the wooden buckling stiffening brace 20. During an earthquake, the wooden tubular body 40 restrains the brace core 30 from buckling (in the directions of arrows X and Y). Therefore, buckling of the brace core 30 is suppressed.

[0047] 3, the end face 32E of the flange portion 32 of the brace core material 30 is covered by a cover material 50. Specifically, the cover material 50 has a pair of plate-shaped portions 50A, 50B connected in an L-shape.

[0048] One plate-shaped portion 50A of the cover material 50 is attached to the outer surface 32A of the flange portion 32 of the brace core material 30 via a spacer 36. The other plate-shaped portion 50B of the cover material 50 is disposed opposite the end face 32E of the flange portion 32 of the brace core material 30, and covers the end face 32E.

[0049] As a result, when the brace core 30 tries to buckle (in the direction of arrow X) during an earthquake, the end face 32E of the flange portion 32 of the brace core 30 comes into contact with the inner surface 40S of the wooden tubular body 40 via the other plate-shaped portion 50B of the cover material 50. As a result, the brace core 30 is prevented from sinking into the inner surface 40S of the wooden tubular body 40. Therefore, buckling of the brace core 30 is prevented. Furthermore, damage to the inner surface 40S of the wooden tubular body 40 is also prevented.

[0050] In addition, by attaching one plate-shaped portion 50A of the cover material 50 to the outer surface 32A of the flange portion 32 of the brace core material 30 via the spacer 36, the end surface 32E of the flange portion 32 can be easily covered by the other plate-shaped portion 50B of the cover material 50. Therefore, the workability of the cover material 50 is improved.

[0051] Furthermore, the wooden tubular body 40 has a pair of first wooden stiffening plates 42 and a pair of second wooden stiffening plates 44. The pair of first wooden stiffening plates 42 and the pair of second wooden stiffening plates 44 are arranged in a rectangular tubular shape in a cross-sectional view, and surround the brace core material 30. Furthermore, the ends of the adjacent first wooden stiffening plates 42 and second wooden stiffening plates 44 are joined to each other at the corners of the wooden tubular body 40 by adhesive and screw members 46.

[0052] In this way, the rigidity of the wooden tubular body 40 can be easily increased by joining the ends of the adjacent first wooden stiffening plate 42 and second wooden stiffening plate 44 with adhesive and screw members 46. Therefore, the buckling restraint force of the wooden tubular body 40 on the brace core material 30 can be increased.

[0053] In addition, the ends of adjacent first and second wood stiffening plates 42, 44 are butted together in a direction intersecting the buckling direction (arrow X direction) of the brace core material 30 when viewed in cross section, and are joined by adhesive and screw members 46.

[0054] As a result, when the brace core 30 tries to buckle and the end face 32E of the flange portion 32 comes into contact with the inner peripheral surface 40S of the wooden cylinder 40 via the cover material 50, the screw member 46 resists due to its shear rigidity. This prevents the adhesive surfaces (end faces 44E) of the ends of the adjacent first wooden stiffening plate 42 and second wooden stiffening plate 44 from peeling off.

[0055] (Modification) Next, a modification of the above embodiment will be described.

[0056] In the above embodiment, the cover material 50 is formed of an L-shaped steel. However, the cover material is not limited to an L-shaped steel. For example, in the modified example shown in Fig. 4, the cover material 60 is formed of a C-shaped steel. That is, the cover material 60 is formed to have a C-shaped cross section.

[0057] The cover material 60 has a pair of flange portions 62 facing each other, and a web portion 64 connecting one end of the pair of flange portions 62 in the width direction. This cover material 60 is arranged to cover the flange portions 32 of the brace core material 30, and the web portion 64 is joined to the outer surface 32A of the flange portions 32 via a plurality of spacers 36 by welding or the like.

[0058] Here, the end face 32E of the flange portion 32 of the brace core member 30 is covered by the flange portion 62 of the cover material 60. As a result, when the brace core member 30 attempts to buckle during an earthquake, the end face 32E of the flange portion 32 of the brace core member 30 comes into contact with the inner circumferential surface 40S of the wooden cylindrical body 40 via the flange portion 62 of the cover material 60. Therefore, the same effect as in the above embodiment can be obtained.

[0059] Furthermore, by covering the brace core 32 of the brace core 30 with the cover material 60, the end face 32E of the brace core 32 can be easily covered with the cover material 60. Therefore, the workability of the cover material 60 is improved.

[0060] In addition, in this modified example, as described above, the cover material 60 is joined in a covering state to the flange portion 32 of the brace core material 30. This increases the bending rigidity of the brace core material 30 in the strong axis direction by the cover material 60. As a result, the brace core material 30 becomes more susceptible to buckling in the weak axis direction, i.e., the buckling direction (arrow X direction). In other words, in this modified example, the buckling direction of the brace core material 30 can be limited to the buckling direction. Therefore, in this modified example, there is no need to consider buckling of the brace core material 30 in the strong axis direction, which makes it easier to design the brace core material 30.

[0061] 5, a cover material 60 formed of C-shaped steel is arranged to span the ends of a pair of flange portions 32 of the brace core material 30. The pair of flange portions 62 of the cover material 60 are joined to the outer surfaces 32A of the pair of flange portions 32 via spacers 36, respectively.

[0062] Here, an end of the flange portion 32 of the brace core member 30 is disposed (inserted) between a pair of flange portions 62 of the cover material 60, and an end face 32E of the flange portion 32 is covered by a web portion 64 of the cover material 60. As a result, when the brace core member 30 attempts to buckle during an earthquake, the end face 32E of the flange portion 32 of the brace core member 30 comes into contact with the inner surface 40S of the wooden tube 40 via the web portion 64 of the cover material 60. Therefore, the same effect as in the above embodiment can be obtained.

[0063] Furthermore, in this modification, when the brace core 30 is about to buckle during an earthquake, the web portion 64 of the cover material 60 spanning the pair of flange portions 32 of the brace core 30 comes into surface contact over a wide area with the inner circumferential surface 40S of the wooden tubular body 40. As a result, the load of the brace core 30 associated with buckling is distributed and transmitted to the inner circumferential surface 40S of the wooden tubular body 40 via the web portion 64 of the cover material 60. Therefore, damage to the inner circumferential surface 40S of the wooden tubular body 40 is further suppressed.

[0064] 4 and 5, the cover material 60 is joined to the brace core material 30. However, the cover material 60 does not necessarily have to be joined to the brace core material 30 as long as it is held in a state in which it covers the end face 32E of the flange portion 32 of the brace core material 30 between the brace core material 30 and the wooden tube 40, for example.

[0065] Next, in a modification shown in Fig. 6, a cover material 70 is formed of a square steel pipe. The cover material 70 has four side walls 70A. The brace core material 30 is disposed (inserted) inside the cover material 70.

[0066] Here, the end face 32E of the flange portion 32 of the brace core member 30 is covered by the side wall portion 70A of the cover material 70. As a result, when the brace core member 30 attempts to buckle during an earthquake, the end face 32E of the flange portion 32 of the brace core member 30 comes into contact with the inner peripheral surface 40S of the wooden cylindrical body 40 via the side wall portion 70A of the cover material 70. Therefore, the same effect as in the above embodiment can be obtained.

[0067] In addition, in this modified example, as described above, the cover material 70 is formed from a square steel pipe. Therefore, the cover material 70 itself also functions as a restraining member that restrains the buckling of the brace core material 30. Therefore, for example, the plate thickness of the wooden cylindrical body 40 (the first wooden stiffening plate 42 and the second wooden stiffening plate 44) can be made thinner.

[0068] 7, the cover material 80 is formed of a flat plate such as a steel plate. The cover material 80 is disposed across the end faces 32E of the pair of flange portions 32 in the brace core material 30, covering the end faces 32E. Both ends of the cover material 80 are joined to the end faces 32E of the pair of flange portions 32 in the brace core material 30 by welding.

[0069] Here, as described above, the end face 32E of the flange portion 32 of the brace core member 30 is covered by the end of the cover material 80. As a result, when the brace core member 30 tries to buckle during an earthquake, the end face 32E of the flange portion 32 of the brace core member 30 comes into contact with the inner surface 40S of the wooden tube 40 via the cover material 80. Therefore, the same effect as in the above embodiment can be obtained.

[0070] Furthermore, in this modification, when the brace core 30 is about to buckle during an earthquake, the cover material 80 spanning the pair of flange portions 32 of the brace core 30 comes into surface contact with the inner circumferential surface 40S of the wooden tubular body 40 over a wide area. This causes the load of the brace core 30 associated with buckling to be distributed and transmitted to the inner circumferential surface 40S of the wooden tubular body 40 via the cover material 80. This further suppresses damage to the inner circumferential surface 40S of the wooden tubular body 40.

[0071] Next, in the modified example shown in Fig. 8, a cover material 90 is attached to the end of the flange portion 32 of the brace core material 30. The cover material 90 is formed of a flat plate such as a steel plate.

[0072] One end of the cover material 90 abuts against the end face 32E of the flange portion 32 of the brace core member 30, covering the end face 32E. The other end of the cover material 90 is a free end, facing the web portion 34 of the brace core member 30. The cover material 90 and the flange portion 32 of the brace core member 30 are welded to each other at their corners.

[0073] Here, as described above, the end face 32E of the flange portion 32 of the brace core member 30 is covered by the end of the cover material 90. As a result, when the brace core member 30 tries to buckle during an earthquake, the end face 32E of the flange portion 32 of the brace core member 30 comes into contact with the inner surface 40S of the wooden cylindrical body 40 via the cover material 90. Therefore, the same effect as in the above embodiment can be obtained.

[0074] In the modified example shown in Figures 7 and 8, if the brace core 30 is made of built H steel, the cover materials 80, 90 may be welded to the brace core 30 when the brace core 30 is manufactured.

[0075] Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment and various modified examples may be used in appropriate combination, and it is of course possible to implement the present invention in various forms without departing from the gist of the present invention. [Explanation of symbols]

[0076] 20 Wood buckling brace 30 Brace core 32 Flange section 32E End face 40 Wooden cylinder 42 Daiichi wood stiffening board (wood stiffening board) 44 Second wood stiffening board (wooden stiffening board) 46 Screw material 50 Cover material 50A Plate-shaped part 50B Plate-shaped part 60 Cover material 70 Cover material 80 Cover material 90 Cover material

Claims

1. A brace core formed of H-shaped steel; A wooden cylindrical body surrounding the brace core material; A cover material for covering an end surface of the flange portion of the brace core material; Equipped with a wooden buckling stiffening brace.

2. The cover material is formed into a C-shaped cross section, and covers the end surface of the flange portion when covered with the flange portion of the brace core material. The wood buckling stiffening brace of claim 1.

3. The cover material has a pair of plate-shaped portions connected in an L-shape, one of the plate-shaped portions is attached to an outer surface of the flange portion, and the other plate-shaped portion faces the end surface of the flange portion. The wood buckling stiffening brace of claim 1.

4. The wooden tubular body has a rectangular tubular shape in cross section and a plurality of wooden stiffening plates surrounding the brace core material, The ends of adjacent wooden stiffening plates are joined at the corners of the wooden cylindrical body with an adhesive or with an adhesive and a screw member. A wood buckling stiffening brace according to any one of claims 1 to 3.

Images