Structural reinforcement structure and brace structure

Abstract

To make it possible to improve toughness of an architectural structure by avoiding buckling of a wooden construction brace even if large earthquake force is applied to the architectural structure.SOLUTION: A frame reinforcement structure for strengthening a frame of an architectural structure comprises at least one wooden construction brace extending along an oblique direction inside the frame and a joint metal fixed to a first component constituting the frame. The wooden construction brace includes a projection part protruding from an apical surface of the wooden construction brace, and the joint metal includes a recess part into which the projection part is inserted. If an acute angle side is defined as the side where an intersection angle between the wooden construction brace and the first component becomes an acute angle and an obtuse angle side is defined as the side where an intersection angle between the wooden construction brace and the first component becomes an obtuse angle, a lateral face of the obtuse angle side of the projection part is configured to abut an internal wall surface inside the recess part.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a structural reinforcement structure and a brace structure for reinforcing the structure of a building.

Background Art

[0002] As an example of the technology related to the structural reinforcement structure, Patent Document 1 discloses providing a pair of connecting portions facing each other on a structure and arranging a wooden brace between the pair of connecting portions. According to the configuration of this Patent Document 1, for example, when an earthquake occurs, if the distance between the pair of connecting portions becomes narrower due to the shear deformation of the structure, the connecting portion presses the tip surface of the wooden brace, and a compressive force is transmitted to the wooden brace. Then, the amount of shear deformation of the structure is reduced by the resistance of the wooden brace against this compressive force.

Prior Art Documents

Patent Documents

[0003]

Patent Document No. 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the technology described in Patent Document 1, the tip surface of the wooden brace pressed by the connecting portion is configured to intersect perpendicularly to the axial direction of the wooden brace. Therefore, when the compressive force transmitted to the wooden brace becomes large, there is a risk that the wooden brace buckles. If the wooden brace buckles, the toughness (ductility) of the building cannot be improved.

[0005] The present disclosure has been made in view of the above problems, and an object thereof is to provide a structural reinforcement structure and a brace structure that can improve the toughness of a building by avoiding buckling of a wooden brace even when a large seismic force acts on the building.

Means for Solving the Problems

[0006] (1) A frame reinforcement structure according to at least one embodiment of the present disclosure is a frame reinforcement structure for reinforcing the frame of a building, comprising: at least one wooden brace extending diagonally through the interior of the frame; and a connecting fitting fixed to a first member constituting the frame, wherein the wooden brace includes a projection protruding from the end surface of the wooden brace, and the connecting fitting includes a recess into which the projection is inserted, and when the side where the intersection angle between the wooden brace and the first member is acute is defined as the acute angle side, and the side where the intersection angle with the first member is obtuse is defined as the obtuse angle side, the side surface of the projection on the obtuse angle side is configured to abut against the inner wall surface of the recess.

[0007] In the configuration described in (1) above, the connecting hardware fixed to the first member constituting the frame includes a recess into which a projection protruding from the tip surface of the wooden brace is inserted. The obtuse-angled side of the projection of the wooden brace is configured to abut against the inner wall surface within the recess of the connecting hardware. Therefore, even if the compressive force transmitted to the wooden brace becomes large, the projection of the wooden brace can be pushed in before the wooden brace buckles. If the wooden brace buckles, it can no longer function as a brace. However, even if the projection of the wooden brace is pushed in, the wooden brace can still perform a certain function as a brace. Therefore, according to the configuration described in (1) above, even when a large seismic force acts on the building, the ductility of the building can be improved by avoiding the buckling of the wooden brace.

[0008] Furthermore, according to the configuration described in (1) above, the obtuse-angled side of the protruding portion of the wooden brace is merely in contact with the side wall within the recess of the connecting hardware. Therefore, even if the connecting hardware attempts to pull on the wooden brace when a large seismic force acts on the building, the tensile force from the connecting hardware is not transmitted to the wooden brace. In other words, damage to the wooden brace due to tensile force can be avoided.

[0009] (2) In some embodiments, in the configuration described in (1) above, the connecting hardware is fixed to the frame via a base attached to the frame.

[0010] According to the configuration described in (2) above, connecting hardware can be fixed to frames having various external shapes.

[0011] (3) In some embodiments, in the configuration described in (1) or (2) above, the at least one wooden brace includes a first wooden brace and a second wooden brace, wherein the protrusion of the first wooden brace and the protrusion of the second wooden brace are inserted into the recess of a common connecting hardware.

[0012] According to the configuration described in (3) above, the protrusions of the first wooden brace and the second wooden brace are inserted into the recesses of a common connecting hardware, thus reducing the number of connecting hardware pieces fixed to the frame.

[0013] (4) In some embodiments, in the configuration described in (3) above, the protruding portion of the first wooden brace abuts against the inner wall surface on one side of the recess of the common connecting hardware, and the protruding portion of the second wooden brace abuts against the inner wall surface on the other side of the recess of the common connecting hardware.

[0014] According to the configuration described in (4) above, the first wooden brace and the second wooden brace are inserted into the recess from different directions. Therefore, when an earthquake force acts on the building, forces do not act simultaneously on the common connecting hardware from the first wooden brace and the second wooden brace. For this reason, damage to the connecting hardware can be suppressed more effectively than when the first wooden brace and the second wooden brace are inserted into the recess from the same direction.

[0015] (5) In some embodiments, in the configuration described in any one of (1) to (4) above, the at least one wooden brace includes a first wooden brace and a second wooden brace, wherein the projection of the first wooden brace and the projection of the second wooden brace have the same cross-sectional shape in a front view of the frame.

[0016] As a result of diligent research by the inventors, it was found that the resistance of a wooden brace to buckling is not determined by the length of the wooden brace, but rather by the cross-sectional shape of the protruding portion in a front view of the frame. According to the configuration described in (5) above, even if the first wooden brace has a different length from the second wooden brace, it can have the same degree of resistance to buckling as the second wooden brace.

[0017] (6) In some embodiments, in the configuration described in any one of (1) to (5) above, the at least one wooden brace includes a first cross wooden brace and a second cross wooden brace arranged to intersect each other within the frame, wherein the first cross wooden brace includes a first cross wooden brace body and a second cross wooden brace body laminated on one surface of the first cross wooden brace body, wherein the second cross wooden brace includes a third cross wooden brace body and a fourth cross wooden brace body laminated on one surface of the third cross wooden brace body, wherein a first groove formed on the other surface of the first cross wooden brace body engages with a third groove formed on the one surface of the third cross wooden brace body, and a second groove formed on the other surface of the second cross wooden brace body engages with a fourth groove formed on the one surface of the fourth cross wooden brace body.

[0018] According to the configuration described in (6) above, the first intersecting wooden brace and the second intersecting wooden brace can be made to intersect each other within the frame without shifting relative to one another.

[0019] (7) In some embodiments, in the configuration according to any one of the above (1) to (6), the structure further includes a metal brace extending along the diagonal direction inside the structure, the metal brace is arranged along the extending direction of the wooden brace, and is fixed to the joint metal object.

[0020] According to the configuration described in the above (7), when a large seismic force acts on the building, the joint metal object can pull the metal brace and make the metal brace function as a tension brace.

[0021] (8) In some embodiments, in the configuration according to the above (7), the metal brace includes a compression force cancellation mechanism configured to cancel the axial compression force acting on the metal brace.

[0022] According to the configuration described in the above (8), since the metal brace includes a compression force cancellation mechanism, the axial compression force acting on the metal brace when it does not include a compression force cancellation mechanism can be borne by the wooden brace.

[0023] (9) In some embodiments, in the configuration according to the above (8), the metal brace includes a first extending portion extending along the axial direction of the metal brace and a second extending portion extending along the axial direction of the metal brace, and one end of one side of the second extending portion is configured to be connected to the other end of the other side of the first extending portion. The compression force cancellation mechanism includes a first through hole formed at the one end of one side of the second extending portion and having a longitudinal shape in the axial direction of the metal brace, and a pin member formed at the other end of the other side of the first extending portion and inserted into the first through hole.

[0024] According to the configuration described in the above (9), even if an attempt is made to compress the metal brace, at least one of the first extending portion and the second extending portion slides, avoiding the action of the compression force on the metal brace. Thus, the compression force cancellation mechanism can be easily realized.

[0025] (10) In some embodiments, in the configuration described in any one of (7) to (9) above, the wooden brace includes a first wooden brace body and a second wooden brace body laminated on the first wooden brace body, and the metal brace is disposed between the first wooden brace body and the second wooden brace body.

[0026] According to the configuration described in (10) above, the metal brace is disposed between the first wooden brace body and the second wooden brace body. Therefore, it is possible to handle it as a part (hybrid brace) combining the wooden brace and the metal brace. In addition, since the appearance of the hybrid brace can be made wood-grained, the design can be improved. Note that in the embodiments described later, the configuration described in (10) above is described in the case where the configuration described in (6) above is further limited, but it is not based on the configuration described in (6) above.

[0027] (11) In some embodiments, in the configuration described in (10) above, a storage space extending along the axial direction of the wooden brace is formed between the first wooden brace body and the second wooden brace body of the wooden brace, and the metal brace is disposed in the storage space.

[0028] According to the configuration described in (11) above, a hybrid brace combining a wooden brace and a metal brace can be easily realized.

[0029] (12) In some embodiments, in the configuration described in any one of (1) to (11) above, the structure is formed of any one of a steel frame structure, a reinforced concrete structure, a wooden structure, a concrete-filled steel tube structure, or a combination thereof.

[0030] According to the configuration described in (12) above, the structure reinforcement structure according to the present disclosure can be applied to a structure formed of any one of a steel frame structure, a reinforced concrete structure, a wooden structure, a concrete-filled steel tube structure, or a combination thereof.

[0031] (13) A brace structure according to at least one embodiment of the present disclosure is a brace structure that is arranged to extend diagonally along the interior of a building frame and is joined to the frame via a connecting fitting fixed to a first member constituting the frame, wherein the brace structure is made of a wooden brace and has a projection that protrudes from the tip surface of the wooden brace and is insertable into a recess of the connecting fitting that is formed to open toward the interior of the frame, and when the side on which the intersection angle between the wooden brace and the first member is defined as an acute angle side and the side on which the intersection angle with the first member is defined as an obtuse angle side, the side surface of the projection on the obtuse angle side is configured to abut against the inner wall surface of the recess.

[0032] According to the configuration described in (13) above, the obtuse-angled side of the protruding portion of the wooden brace comes into contact with the inner wall surface of the recess in the connecting hardware. Therefore, even if the compressive force transmitted to the wooden brace becomes large, the protruding portion of the wooden brace can be pushed in before the wooden brace buckles. If the wooden brace buckles, it can no longer function as a brace. However, even if the protruding portion of the wooden brace is pushed in, the wooden brace can still perform a certain function as a brace. Therefore, according to the configuration described in (13) above, even if a large seismic force acts on the building, the ductility of the building can be improved by avoiding the buckling of the wooden brace.

[0033] Furthermore, according to the configuration described in (13) above, the obtuse-angled side of the protruding portion of the wooden brace is merely in contact with the side wall within the recess of the connecting hardware. Therefore, even if the connecting hardware attempts to pull on the wooden brace when a large seismic force acts on the building, the tensile force from the connecting hardware is not transmitted to the wooden brace. In other words, damage to the wooden brace due to tensile force can be avoided.

[0034] (14) A brace structure according to at least one embodiment of the present disclosure is a brace structure that is arranged to extend diagonally inside the frame of a building and is joined to the frame via a connecting fitting fixed to a first member constituting the frame, wherein the brace structure comprises a wooden brace and a metal brace, the wooden brace has a projection that protrudes from its end surface and is insertable into a recess of the connecting fitting that is formed to open toward the inside of the frame, and when the side on which the intersection angle between the wooden brace and the first member is defined as an acute angle is defined as the acute angle side and the side on which the intersection angle with the first member is defined as an obtuse angle side, the side surface of the projection on the obtuse angle side is configured to abut against the inner wall surface of the recess, and the metal brace is arranged along the direction of extension of the wooden brace so as to extend diagonally inside the frame and is fixed to the connecting fitting.

[0035] According to the configuration described in (14) above, even when a large seismic force acts on the building, the ductility of the building can be improved by avoiding buckling of the wooden braces. Furthermore, damage to the wooden braces due to tensile forces can be avoided. In addition, when a large seismic force acts on the building, the connecting hardware can pull on the metal braces, allowing the metal braces to function as tension braces. [Effects of the Invention]

[0036] According to at least one embodiment of this disclosure, even when a large seismic force acts on a building, the ductility of the building can be improved by avoiding buckling of the wooden braces. [Brief explanation of the drawing]

[0037] [Figure 1] This is a schematic front view showing the configuration of the frame according to the first embodiment of this disclosure. [Figure 2] This figure schematically shows the configuration of a frame reinforcement structure according to the first embodiment of this disclosure. [Figure 3] This is a perspective view showing the configuration of a connecting hardware according to the first embodiment of the present disclosure, with the wooden brace shown disassembled from the connecting hardware. [Figure 4] This diagram schematically shows a configuration in which a first crossed wooden brace and a second crossed wooden brace intersect according to the first embodiment of this disclosure. [Figure 5] This figure illustrates the effect of the frame reinforcement structure according to the first embodiment of this disclosure, and is a graph showing the relationship between compressive force and deformation. [Figure 6] This diagram schematically shows the configuration of a structural reinforcement structure related to a reference example. [Figure 7] This is a schematic front view showing the configuration of a frame reinforcement structure according to the second embodiment of this disclosure. [Figure 8] This is a perspective view showing the configuration of a connecting hardware according to a second embodiment of this disclosure. [Figure 9] This figure schematically shows the configuration of the compression force cancellation mechanism according to the second embodiment of this disclosure. [Figure 10] This is a perspective view illustrating the configuration of a hybrid brace (wooden brace + metal brace) according to the second embodiment of this disclosure. [Figure 11] This is a schematic perspective view showing the configuration of a frame according to several embodiments of this disclosure. [Figure 12] This is a schematic front view showing the configuration of the frame according to the third embodiment of this disclosure. [Figure 13] This is a perspective view showing the configuration of a connecting hardware according to a third embodiment of this disclosure. [Figure 14] This is a diagram illustrating an example of how connecting hardware is fixed to a beam. [Modes for carrying out the invention]

[0038] Hereinafter, several embodiments of the present invention will be described with reference to the attached drawings. However, the dimensions, materials, shapes, relative arrangements, etc., of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples.

[0039] <First Embodiment> (Structure of the structural reinforcement) The configuration of the frame reinforcement structure 1 according to the first embodiment of this disclosure will now be described. The frame reinforcement structure 1 is for reinforcing the frame 2 of a building. As shown in Figure 1, the frame 2 is assembled by connecting columns 4 and beams 6 to each other. In the first embodiment, the frame 2 is made of steel (S structure). In this disclosure, including the notation in the drawings, the direction in which the columns 4 extend is referred to as the "vertical direction W1", and the direction in which the beams 6 extend is referred to as the "horizontal direction W2". When the building is viewed from above, if the building has a rectangular shape, the beams 6 may extend along the longitudinal direction of the building or along the short direction of the building. Also, when the building is viewed from above, if the building has a circular shape, the beams 6 may extend along the radial direction of the building.

[0040] In the first embodiment, the frame 2 is formed of steel, but the disclosure is not limited to this embodiment. In some embodiments, the frame 2 is formed of steel, reinforced concrete, wood, concrete-filled steel pipe, or a combination thereof. For example, the frame 2 may be formed of concrete-filled steel pipe (CFT) or reinforced steel-reinforced concrete (SRC). Furthermore, the columns 4 and beams 6 constituting the frame 2 do not need to be of the same structure, and may be formed by a combination of the various structures presented in this disclosure. (For example, the columns 4 may be made of CFT and the beams 6 may be made of steel.)

[0041] The structural reinforcement structure 1 comprises a brace structure 9 consisting of wooden braces 8 and connecting hardware 10.

[0042] The wooden braces 8 are arranged to extend diagonally along the interior 3 of the frame 2, which is formed by being enclosed by a pair of columns 4,4 and a pair of beams 6,6. The pair of columns 4,4 are arranged side by side in the left-right direction W2. The pair of beams 6,6 are arranged side by side in the up-down direction W1. The steel materials forming the columns 4 and beams 6 are not particularly limited and may be, for example, H-shaped steel, square steel, round steel, angle steel, or channel steel. The columns 4 and beams 6 may also be formed by a combination of steel materials. In this case, the columns 4 and beams 6 may have, for example, a box shape. The wooden braces 8 extend upward from left to right or downward from left to right within the interior 3 of the frame 2. In the exemplary form shown in Figure 1, multiple wooden braces 8 (the first wooden brace 32 and the second wooden brace 34, described later) are provided so that the interior 3 of the frame 2 is divided into a grid pattern in a front view of the frame 2. In the exemplary embodiment shown in Figure 1, the structural reinforcement structure 1 is described in a case where both the first wooden brace 32 and the second wooden brace 34 are provided inside the frame 2 3, but this disclosure is not limited to this embodiment. The structural reinforcement structure 1 may be configured in which either the first wooden brace 32 or the second wooden brace 34 is provided inside the frame 2 3, and the other is not provided (the wooden brace 8 may be arranged in a single-slope configuration).

[0043] The connecting hardware 10 is fixed to the column 4 or beam 6 and connects the wooden brace 8 to the column 4, or the wooden brace 8 to the beam 6. The connecting hardware 10 may be fixed to the column 4 or beam 6 by welding, for example, or by fasteners such as high-strength bolts. In this embodiment, the connecting hardware 10 is fixed to the inner circumferential surface 5 of the frame 2 and protrudes from the inner circumferential surface 5 of the frame 2 toward the interior 3 of the frame 2. This inner circumferential surface 5 of the frame 2 includes the inner surface 5A of the outer circumferential surface of the column 4 that faces the interior 3 of the frame 2, and the inner surface 5B of the outer circumferential surface of the beam 6 that faces the interior 3 of the frame 2. In the exemplary form shown in Figure 1, the connecting hardware 10 fixed to one of the pair of columns 4, 4, which is located on the left side in the left-right direction W2, is attached to the inner surface 5A of the column 4 via a base 7 placed between the column 4 and the connecting hardware 10. The connecting hardware 10 fixed to the other column 4, which is located on the right side in the left-right direction W2 of the pair of columns 4,4 is directly attached to the inner surface 5A of column 4. The connecting hardware 10 fixed to beam 6 is directly attached to the inner surface 5B of beam 6. The protruding surface 12 of the connecting hardware 10 has a recess 14 formed therein that is recessed toward the opposite side from the interior 3 side of the frame 2 (i.e., toward column 4 or beam 6). The wooden brace 8 includes a projection 18 that protrudes from the tip surface 16 of the wooden brace 8 toward the opposite side from the interior 3 side of the frame 2. This projection 18 is configured to be insertable into the recess 14 of the connecting hardware 10.

[0044] Referring to Figure 2, the part where the wooden brace 8 and the beam 6 are joined by the connecting hardware 10 will be explained. In the exemplary form shown in Figure 2, the connecting hardware 10 protrudes upward from the inner surface 5B of the beam 6. The wooden brace 8 extends upward from left to right. Although the protruding portion 18 of the wooden brace 8 is provided on both end faces 16 of the wooden brace 8 (see Figure 1), only the protruding portion 18 provided on one end face 16 of the wooden brace 8 will be illustrated and explained. The connecting hardware 10 may also be a connecting hardware 10 that joins the column 4 and the wooden brace 8.

[0045] As shown in Figure 2, the side where the angle of intersection between the axis O1 of the wooden brace 8 and the beam 6 is an acute angle θ1 is designated as the right side (acute angle side), and the side where the angle of intersection with the beam 6 is an obtuse angle θ2 is designated as the left side (obtuse angle side). Hereafter, the direction in which the axis O1 of the wooden brace 8 extends will be referred to as the "first axial direction".

[0046] The wooden brace 8 includes a projection 18 that protrudes toward the beam 6 from the tip surface 16 of the wooden brace 8. The tip surface 16 of the wooden brace 8 has a planar shape and faces the projection surface 12 of the connecting hardware 10. In this embodiment, the tip surface 16 of the wooden brace 8 and the projection surface 12 of the connecting hardware 10 are configured to be parallel to each other with the inner surface 5B of the beam 6. The projection 18 protrudes toward the beam 6 from a part of the left side of the tip surface 16 in the left-right direction W2. The projection 18 is not provided on the remaining right side of the tip surface 16 in the left-right direction W2, and is in contact with the projection surface 12 of the connecting hardware 10.

[0047] The connecting hardware 10 includes a recess 14 into which the protruding portion 18 is inserted. The left side surface 20 of the protruding portion 18 abuts against the left side inner wall surface 22 within the recess 14. In this embodiment, the recess 14 is configured such that the left inner wall surface 22 intersects perpendicularly with respect to the left-right direction W2. The protruding portion 18 is configured such that the left side surface 20 intersects perpendicularly with respect to the left-right direction W2.

[0048] Furthermore, although not shown, in some embodiments, the left inner wall surface 22 of the recess 14 may be inclined with respect to the left-right direction W2. The left inner wall surface 22 of the recess 14 may be inclined with respect to the left-right direction W2 such that the distance from the bottom surface 28 of the recess 14 increases as you move from left to right. In this case, the left side surface 20 of the protrusion 18 is in surface contact with the left inner wall surface 22 inside the recess 14. Alternatively, the left inner wall surface 22 of the recess 14 may be inclined with respect to the left-right direction W2 such that it approaches the bottom surface 28 of the recess 14 as you move from left to right.

[0049] In the exemplary configuration shown in Figure 2, the right side surface 24 of the protrusion 18 is spaced apart from the right inner wall surface 30 of the recess 14. The tip surface 26 of the protrusion 18 is in contact with the bottom surface 28 of the recess 14. Although not shown, in some embodiments, the right side surface 24 of the protrusion 18 is in contact with the right inner wall surface 30 of the recess 14. Also, although not shown, in some embodiments, the tip surface 26 of the protrusion 18 is spaced apart from the bottom surface 28 of the recess 14.

[0050] Furthermore, in the first embodiment, as shown in Figure 1, the wooden brace 8 includes a first wooden brace 32(8) and a second wooden brace 34(8). In this embodiment, the wooden brace 8 that extends upward from left to right is designated as the first wooden brace 32. The wooden brace 8 that extends downward from left to right is designated as the second wooden brace 34. The protruding portion 36(18) of the first wooden brace 32 and the protruding portion 38(18) of the second wooden brace 34 may be inserted into the recess 14 of the common connecting hardware 10.

[0051] Here, with reference to Figure 3, an example of the configuration of the connecting hardware 10 will be described. The connecting hardware 10 includes a left wall surface forming portion 44 and a right wall surface forming portion 46. The left wall surface forming portion 44 and the right wall surface forming portion 46 are each fixed to the inner surface 5B of the beam 6. The left wall surface forming portion 44 and the right wall surface forming portion 46 are arranged side by side, spaced apart from each other in the left-right direction W2.

[0052] The left wall-forming portion 44 includes an upwardly extending portion 48 extending upward from the inner surface 5B of the beam 6, a leftward extending portion 50 extending to the left from the upper end of the upwardly extending portion 48, and a first bottom portion 28A (28) extending to the right from between the upper and lower ends of the upwardly extending portion 48. The upwardly extending portion 48 of the left wall-forming portion 44 protrudes upward above the first bottom portion 28A. The portion 47 of the right side of the upwardly extending portion 48 of the left wall-forming portion 44 that is above the first bottom portion 28A corresponds to the left inner wall surface 22 of the recess 14 described above. In addition, the upper surface 49 of the leftward extending portion 50 corresponds to a part of the protruding surface 12 of the connecting hardware 10 described above (the protruding surface 12 on the side that is not in contact with the tip surface 16 of the first wooden brace 32).

[0053] The right-side wall-forming portion 46 includes an upwardly extending portion 52 extending upward from the inner surface 5B of the beam 6, a rightward extending portion 54 extending to the right from the upper end of the upwardly extending portion 52, and a second bottom portion 28B (28) extending to the left from between the upper and lower ends of the upwardly extending portion 52. The upwardly extending portion 52 of the right-side wall-forming portion 46 protrudes upward above the second bottom portion 28B. The portion 51 of the left side of the upwardly extending portion 52 of the right-side wall-forming portion 46 that is above the second bottom portion 28B corresponds to the right inner wall surface 30 of the recess 14 described above. In addition, the upper surface 53 of the rightward extending portion 54 corresponds to the remaining portion of the protruding surface 12 of the connecting hardware 10 described above (the protruding surface 12 on the side that is in contact with the tip surface 16 of the first wooden brace 32). Furthermore, in the left-right direction W2, the first bottom portion 28A and the second bottom portion 28B are spaced apart from each other.

[0054] Furthermore, in the exemplary configuration shown in Figure 3, the protruding portion 36 of the first wooden brace 32 abuts against the left inner wall surface 22 (one side inner wall surface) of the recess 14 of the common connecting hardware 10 when it is inserted into the recess 14 of the common connecting hardware 10. Similarly, the protruding portion 38 of the second wooden brace 34 abuts against the right inner wall surface 30 (the other side inner wall surface) of the recess 14 of the common connecting hardware 10 when it is inserted into the recess 14 of the common connecting hardware 10. In addition, in the direction perpendicular to the vertical direction W1 and the left-right direction W2 (the depth direction of the paper, hereinafter referred to as the "front-back direction W3"), the protruding portion 36 of the first wooden brace 32 and the protruding portion 38 of the second wooden brace 34 are inserted into the recess 14 of the common connecting hardware 10 with a staggered orientation. In this embodiment, the first wooden brace 32 is positioned on one side (the front side) of the front-to-back direction W3 than the second wooden brace 34. Also, with the common connecting hardware 10 as the starting point, in the left-to-right direction W2, the first wooden brace 32 extends to the right from the common connecting hardware 10, and the second wooden brace 34 extends to the left from the common connecting hardware 10. Furthermore, the protruding portion 36 of the first wooden brace 32 and the protruding portion 38 of the second wooden brace 34 have the same rectangular cross-sectional shape in the plane defined by the sides extending along the vertical direction W1 and the left-to-right direction W2 when viewed from the front of the frame 2 (viewed from the front side in the front-to-back direction W3).

[0055] Furthermore, in the first embodiment, as shown in Figure 1, the wooden brace 8 includes a first intersecting wooden brace 56(8) and a second intersecting wooden brace 58(8) arranged to intersect each other inside the frame 2 3. Referring to Figure 4, a configuration in which the first intersecting wooden brace 56 and the second intersecting wooden brace 58 intersect will be described. In this disclosure, the wooden brace 8 that extends upward from left to right is defined as the first intersecting wooden brace 56. In other words, the first wooden brace 32 described above corresponds to the first intersecting wooden brace 56. Also, the wooden brace 8 that extends downward from left to right is defined as the second intersecting wooden brace 58. In other words, the second wooden brace 34 described above corresponds to the second intersecting wooden brace 58.

[0056] The first cross-timbered brace 56 includes a first cross-timbered brace body 60 and a second cross-timbered brace body 62. The first cross-timbered brace body 60 has a long plate shape and extends along the axial direction of the first cross-timbered brace 56. The second cross-timbered brace body 62 has a long plate shape and extends along the axial direction of the first cross-timbered brace 56. The second cross-timbered brace body 62 is laminated onto one surface 61 of the first cross-timbered brace body 60, which has a planar shape. In this disclosure, the direction that one surface 61 of the first cross-timbered brace body 60 faces is one of the "thickness directions W4". In the exemplary embodiment shown in Figure 4, one surface 61 of the first cross-timbered brace body 60 faces the other surface 63 of the second cross-timbered brace body 62 in the other thickness direction W4.

[0057] The second cross wooden brace 58 includes a third cross wooden brace body 64 and a fourth cross wooden brace body 66. The third cross wooden brace body 64 has a long plate shape and extends along the axial direction of the second cross wooden brace 58. The fourth cross wooden brace body 66 has a long plate shape and extends along the axial direction of the second cross wooden brace 58. The fourth cross wooden brace body 66 is laminated onto one side 65 of the third cross wooden brace body 64 in the thickness direction W4, which has a planar shape. In the exemplary embodiment shown in Figure 4, one side 65 of the third cross wooden brace body 64 faces the other side 67 of the fourth cross wooden brace body 66 in the thickness direction W4.

[0058] Furthermore, a first groove 70 is formed on the other side 69 of the first cross wooden brace body 60 in the thickness direction W4, recessed toward one side in the thickness direction W4. Also, a second groove 72 is formed on the other side 63 of the second cross wooden brace body 62, recessed toward one side in the thickness direction W4. The first groove 70 is recessed from the other side 69 of the first cross wooden brace body 60 over the entire width direction of the first cross wooden brace body 60 (a direction perpendicular to the thickness direction W4 and the axial direction of the first cross wooden brace 56). The second groove 72 is recessed from the other side 63 of the second cross wooden brace body 62 over the entire width direction of the second cross wooden brace body 62 (a direction perpendicular to the thickness direction W4 and the axial direction of the first cross wooden brace 56).

[0059] Furthermore, a third groove 74 is formed on one surface 65 of the third intersecting wooden brace body 64, recessed toward the other side in the thickness direction W4. Also, a fourth groove 76 is formed on one surface 71 of the fourth intersecting wooden brace body 66, recessed toward the other side in the thickness direction W4. The third groove 74 is recessed from one surface 65 of the third intersecting wooden brace body 64 over the entire width direction of the third intersecting wooden brace body 64 (a direction perpendicular to the thickness direction W4 and the axial direction of the second intersecting wooden brace 58). The fourth groove 76 is recessed from one surface 71 of the fourth intersecting wooden brace body 66 over the entire width direction of the fourth intersecting wooden brace body 66 (a direction perpendicular to the thickness direction W4 and the axial direction of the second intersecting wooden brace 58).

[0060] Then, the first groove 70 formed on the other surface 69 of the first intersecting wooden brace body 60 engages with the third groove 74 formed on one surface 65 of the third intersecting wooden brace body 64. Also, the second groove 72 formed on the other surface 63 of the second intersecting wooden brace body 62 engages with the fourth groove 76 formed on one surface 71 of the fourth intersecting wooden brace body 66. In this embodiment, in the region where the first intersecting wooden brace 56 and the second intersecting wooden brace 58 intersect, the third intersecting wooden brace body 64, the first intersecting wooden brace body 60, the fourth intersecting wooden brace body 66, and the second intersecting wooden brace body 62 are arranged (stacked) in that order in the direction from one side to the other in the thickness direction W4.

[0061] (Effects / Actions) The operation and effects of the frame reinforcement structure 1 according to the first embodiment of this disclosure will be explained. Figure 5 shows a graph illustrating the relationship between the compressive force acting on the wooden brace 8 and the amount of deformation of the frame 2. The wooden brace 8 according to the first embodiment of this disclosure is shown with a solid line, and the wooden brace 08 according to the reference example is shown with a dotted line. As shown in Figure 6, in the wooden brace 08 according to the reference example, the tip surface 016 of the wooden brace 08 does not have a protruding portion that is inserted into the recess of the connecting hardware 010, and the tip surface 016 of the wooden brace 08 and the protruding surface 012 of the connecting hardware 010 are in contact. Furthermore, the tip surface 016 of the wooden brace 08 and the protruding surface 012 of the connecting hardware 010 intersect perpendicularly with respect to the axis O direction of the wooden brace 08.

[0062] As shown by the dotted line in Figure 5, in the wooden brace 08 of the reference example, as the compressive force acting on the wooden brace 08 increases, the wooden brace 08 itself is compressed and deformed. When the compressive force reaches a predetermined value P1, the wooden brace 08 buckles. When the wooden brace 08 buckles, it can no longer function as a compression brace. In contrast, in the wooden brace 8 of the first embodiment, as the compressive force acting on the wooden brace 8 increases, the wooden brace 8 is compressed and the frame 2 also deforms. However, when the compressive force acting on the wooden brace 8 reaches a predetermined value P2, the protruding portion 18 preferentially sinks in before the wooden brace 8 buckles, so that the compressive force acting on the wooden brace 8 does not increase any further, and only the deformation of the frame 2 increases.

[0063] According to the configuration of the structural reinforcement structure 1 in the first embodiment of this disclosure, even when a large seismic force acts on a building and the compressive force transmitted from the connecting hardware 10 to the wooden brace 8 becomes large, the left side surface 20 of the protruding portion 18 and the left inner wall surface 22 within the recess 14 of the connecting hardware 10 are in contact, so the protruding portion 18 of the wooden brace 8 can be pushed in before the wooden brace 8 buckles. Even when the protruding portion 18 of the wooden brace 8 is pushed in, the wooden brace 8 can still perform a certain function as a compression brace. Therefore, even when a large seismic force acts on a building, buckling of the wooden brace 8 can be avoided and the ductility of the building can be improved.

[0064] As illustrated and explained in Figures 1 and 3, the protruding portion 36 of the first wooden brace 32 and the protruding portion 38 of the second wooden brace 34 are inserted into the recess 14 of the common connecting hardware 10, thereby reducing the number of connecting hardware 10 fixed to the frame 2.

[0065] Furthermore, according to the configuration illustrated in Figures 1 and 3, the first wooden brace 32 and the second wooden brace 34 are inserted into the recess 14 of the common connecting hardware 10 from different directions. Therefore, when an earthquake force acts on the building, forces do not act simultaneously on the common connecting hardware 10 from the first wooden brace 32 and the second wooden brace 34. For this reason, damage to the connecting hardware 10 can be suppressed more effectively than when the first wooden brace 32 and the second wooden brace 34 are inserted into the recess 14 of the common connecting hardware 10 from the same direction.

[0066] Furthermore, as a result of our diligent research, we have found that the resistance of the wooden brace 8 to buckling is not determined by the length of the wooden brace 8, but rather by the cross-sectional shape of the protruding portion 18 in a front view of the frame 2. In the configuration illustrated in Figures 1 and 3, the protruding portion 36 of the first wooden brace 32 and the protruding portion 38 of the second wooden brace 34 have the same cross-sectional shape in a front view of the frame 2. Therefore, for example, even if the first wooden brace 32 extends longer diagonally through the interior 3 of the frame 2 than the second wooden brace 34, the first wooden brace 32 can have the same degree of resistance to buckling as the second wooden brace 34. In addition, by unifying the dimensions of the protruding portion 36 of the first wooden brace 32 and the protruding portion 38 of the second wooden brace 34, the production efficiency of the wooden brace 8, including the first wooden brace 32 and the second wooden brace 34, can be improved.

[0067] Furthermore, according to the configuration illustrated in Figures 1 and 4, the first intersecting wooden brace 56 and the second intersecting wooden brace 58 can be made to intersect each other within the interior 3 of the frame 2 without shifting relative to each other.

[0068] <Second Embodiment> (Hybrid brace configuration) A frame reinforcement structure 1 according to a second embodiment of this disclosure will now be described. The second embodiment differs from the first embodiment in that a metal brace 80 is further provided, but the other configurations are the same as those described in the first embodiment. In the second embodiment, components that are the same as those in the first embodiment are denoted by the same reference numerals, and their detailed descriptions are omitted.

[0069] As shown in Figure 7, the structural reinforcement structure 1 further comprises a metal brace 80 extending diagonally along the interior 3 of the frame 2. In other words, the structural reinforcement structure 1 further comprises a brace structure 9 having a wooden brace 8 and a metal brace 80. The metal brace 80 is made of metal. The metal brace 80 is fixed to a connecting hardware 10 and includes a compression force cancellation mechanism 82 configured to cancel the axial compression force acting on the metal brace 80. In this embodiment, the metal brace 80 is placed inside the wooden brace 8, and a so-called hybrid brace consisting of a combination of different materials is provided inside the frame 2. The metal brace 80 is fixed to the connecting hardware 10 by fastening one end 84a of the metal brace 80 to the connecting hardware 10 with a fastener 85 such as a bolt. Furthermore, the other end 84b of the metal brace 80 is fastened by fasteners 85 such as bolts to a different connecting fitting 10 than the one end 84a of the metal brace 80 fastened to. Also, this disclosure is not limited to this embodiment, and the metal brace 80 may be fixed to the connecting fitting 10 by methods other than fixing with fasteners 85.

[0070] Referring to Figure 8, an example of the configuration of the connecting hardware 10 for fixing the metal brace 80 to the connecting hardware 10 will be described. One end 84a of the metal brace 80 protrudes from the side opposite to the interior 3 side of the frame 2 (towards the beam 6 side) compared to the protruding portion 18 of the wooden brace 8. In addition, a through hole 84c into which a fastener 85 is inserted is provided at the end 84a of the metal brace 80.

[0071] The connecting hardware 10 has a shape that is divided into two parts in the front-rear direction W3, and is configured to have a gap 87 between them into which one end 84a of the metal brace 80 can be inserted. In the exemplary embodiment shown in Figure 8, the left side wall forming portion 44 of the connecting hardware 10 includes a first left side wall forming portion 44a and a second left side wall forming portion 44b, which are arranged side by side in the front-rear direction W3. In the front-rear direction W3, the first left side wall forming portion 44a is located in front of the second left side wall forming portion 44b. The first left side wall forming portion 44a and the second left side wall forming portion 44b are spaced apart from each other. Similarly, the right side wall forming portion 46 of the connecting hardware 10 includes a first right side wall forming portion 46a and a second right side wall forming portion 46b, which are arranged side by side in the front-rear direction W3. In the front-rear direction W3, the first right side wall forming portion 46a is located in front of the second right side wall forming portion 46b. The first right-side wall forming portion 46a and the second right-side wall forming portion 46b are spaced apart from each other. In other words, in this embodiment, the gap 87 is formed by spacing the first left-side wall forming portion 44a and the second left-side wall forming portion 44b apart from each other, and by spacing the first right-side wall forming portion 46a and the second right-side wall forming portion 46b apart from each other. The first left-side wall forming portion 44a, the second left-side wall forming portion 44b, the first right-side wall forming portion 46a, and the second right-side wall forming portion 46b are each configured to be fastened to the upper and lower parts 91b of the L-shaped member 91, which will be described later, by fasteners such as bolts. In other words, the left-side wall forming portion 44 and the right-side wall forming portion 46 are fixed to the inner surface 5B of the beam 6 via the L-shaped member 91.

[0072] Furthermore, in the exemplary embodiment shown in Figure 8, the connecting hardware 10 further includes a pair of L-shaped members 91, 91. The pair of L-shaped members 91, 91 are arranged side by side in the front-rear direction W3. Each L-shaped member 91 includes a plate-shaped horizontal portion 91a that is fixed to the inner surface 5B of the beam 6, and a plate-shaped upper and lower portion 91b that is inserted into the gap 87. Within the gap 87, the upper and lower portions 91b of the pair of L-shaped members 91, 91 are arranged to be spaced apart from each other in the front-rear direction W3. In other words, within the gap 87, the upper and lower portions 91b of the pair of L-shaped members 91, 91 define an insertion space 89. One end 84a of the metal brace 80 is inserted into the insertion space 89, and the through-holes 91c formed in the upper and lower portions 91b and the through-holes 84c of the one end 84a of the metal brace 80 are fastened together by a fastener 85 (not shown).

[0073] In addition, Figure 8 shows an example in which one wooden brace 8 and one metal brace 80 are fixed to the connecting hardware 10. However, as shown in Figure 7, another wooden brace 8 and one metal brace 80 may also be attached to the connecting hardware 10 from directions that are symmetrical with respect to the position of the through-hole 91c of the connecting hardware 10. In this case, the two metal braces 80 are fixed at the position of the through-hole 91c of the connecting hardware 10 by a common fastener 85. The insertion of the two wooden braces 8 into the connecting hardware 10 is the same as the structure shown in Figure 3.

[0074] Referring to Figure 9, the configuration of the compression force cancellation mechanism 82 will be described. The metal brace 80 includes a first extending portion 84 and a second extending portion 86. The first extending portion 84 extends along the direction of the axis O2 of the metal brace 80. Hereinafter, the direction of the axis O2 of the metal brace 80 will be referred to as the "second axial direction". This second axial direction may be parallel to the first axial direction, which is the axial direction of the wooden brace 8 described above.

[0075] The second extension portion 86 extends along the second axial direction, and one end portion 94 of the second extension portion 86 in the second axial direction is configured to connect with the other end portion 90 of the first extension portion 84 in the second axial direction. The second extension portion 86 has a first through hole 92 that penetrates the one end portion 94 of the second extension portion 86. This first through hole 92 has an elongated shape in the second axial direction. The first extension portion 84 is also provided with a pin member 96 that protrudes from the other end portion 90 of the first extension portion 84. This pin member 96 is inserted through the first through hole 92. In the example shown in Figure 9, the pin member 96 is in contact with the inner wall surface 98 of the inner wall surface of the first through hole 92 that is facing the other direction in the second axial direction. However, the pin member 96 is movable by the length of the first through hole 92 in the second axial direction, and this structure allows the compressive force acting on the metal brace 80 to be canceled out.

[0076] In the exemplary embodiment shown in Figure 9, the metal brace 80 further includes a third extension 88. The third extension 88 extends along the second axial direction. A hole 101 is formed in one end 99 of the third extension 88 on one side in the second axial direction, and a protruding member 103, which protrudes from the other end 100 of the second extension 86, passes through it. The combination of this hole 101 and the protruding member 103 fixes the second extension 86 to the third extension 88. As shown in Figure 7, one end of the first extension 84 on one side in the second axial direction corresponds to one end 84a of the metal brace 80 described above. Similarly, the other end of the third extension 88 on the other side in the second axial direction corresponds to the other end 84b of the metal brace 80 described above.

[0077] Referring to Figure 10, a configuration in which a metal brace 80 is placed inside a wooden brace 8 (i.e., a hybrid brace configuration) will be described. The wooden brace 8 includes a first wooden brace body 102 and a second wooden brace body 104 which is laminated on the first wooden brace body 102. The metal brace 80 is then placed between the first wooden brace body 102 and the second wooden brace body 104.

[0078] In this embodiment, the first wooden brace body 102(60) is a further limited configuration of the first cross wooden brace body 60 described in the first embodiment. Furthermore, the second wooden brace body 104(62) is a further limited configuration of the second cross wooden brace body 62 described in the first embodiment. Hereafter, the first wooden brace body 102 will be referred to as the first cross wooden brace body 60, and the second wooden brace body 104 will be referred to as the second cross wooden brace body 62.

[0079] In this embodiment, the first intersecting wooden brace 56 has a first storage space 106 extending along the axial direction of the first intersecting wooden brace 56 between the first intersecting wooden brace body 60 (first wooden brace body 102) and the second intersecting wooden brace body 62 (second wooden brace body 104). In the exemplary form shown in Figure 10, the first storage space 106 is formed by a part of one surface 61 of the first intersecting wooden brace body 60 being recessed toward the other surface 69 of the first intersecting wooden brace body 60. The metal brace 80 is then placed within the first storage space 106. However, the first storage space 106 is not limited to the configuration illustrated in Figure 10, as long as it is configured to accommodate the metal brace 80. For example, although not shown, the first storage space 106 may be formed by a part of the other surface 63 of the second cross wooden brace body 62 being recessed toward one surface of the second cross wooden brace body 62 (the surface facing one side in the thickness direction W4).

[0080] In the exemplary embodiment shown in Figure 10, the first intersecting wooden brace body 60 includes a pair of first spacers 108, 108 positioned on the remaining portion of one face 61 of the first intersecting wooden brace body 60 (the portion where the first storage space 106 is not formed). Each of the pair of first spacers 108, 108 has a longitudinal shape and extends along the axial direction of the first intersecting wooden brace 56. Each of the pair of first spacers 108, 108 has a gap 109 through which the intersecting metal brace 114 intersecting the metal brace 80 passes. Each of the pair of first spacers 108, 108 is spaced apart from each other in the width direction of the first intersecting wooden brace body 60. Although the first intersecting wooden brace body 60 has been described as including a pair of first spacers 108, 108 as an example, this disclosure is not limited to this embodiment.

[0081] Furthermore, in the exemplary configuration shown in Figure 10, the third intersecting wooden brace body 64 includes a pair of second spacers 110, 110 positioned on one surface 65 of the third intersecting wooden brace body 64. Each of the pair of second spacers 110, 110 has a longitudinal shape and extends along the axial direction of the second intersecting wooden brace 58. Each of the pair of second spacers 110, 110 is provided on both sides of the third groove 74 in the axial direction of the second intersecting wooden brace 58. Also, each of the pair of second spacers 110, 110 is spaced apart from each other in the width direction of the third intersecting wooden brace body 64. The second storage space 112 is formed by being enclosed by the third intersecting wooden brace body 64 and the pair of second spacers 110, 110. An intersecting metal brace 114 intersecting the metal brace 80 is positioned in the second storage space 112. The intersecting metal brace 114 is located on one side of the first intersecting wooden brace body 60 in the thickness direction W4. The second storage space 112 is not limited to the configuration illustrated in Figure 10, as long as it is configured to accommodate the intersecting metal brace 114. For example, although not shown, the second storage space 112 may be formed by a part of one surface 65 of the third intersecting wooden brace body 64 being recessed toward the other surface of the third intersecting wooden brace body 64 (the surface facing the other side in the thickness direction W4). Furthermore, although the third intersecting wooden brace body 64 has been described as including a pair of second spacers 110, 110, this disclosure is not limited to this embodiment.

[0082] (Effects / Actions) According to the second embodiment, when a large seismic force acts on a building, the connecting hardware 10 pulls on the metal brace 80, allowing the metal brace 80 to function as a tension brace. Furthermore, since the metal brace 80 includes a compression force cancellation mechanism 82, the axial compressive force of the metal brace 80 that would act on the metal brace 80 if the compression force cancellation mechanism 82 were not included can be borne by the wooden brace 8. With the compression force cancellation mechanism 82 illustrated in Figure 8, even if an attempt is made to compress the metal brace 80, at least one of the first extended portion 84 and the second extended portion 86 slides, thereby avoiding the action of compressive force on the metal brace 80.

[0083] Furthermore, according to the second embodiment, the metal brace 80 is positioned between the first wooden brace body 102 and the second wooden brace body 104. This allows the wooden brace 8 and the metal brace 80 to be treated as a single component (hybrid brace). In addition, the appearance of the hybrid brace can be made to resemble wood grain, thereby improving its aesthetic appeal.

[0084] Although the frame reinforcement structures according to the first and second embodiments of this disclosure have been described above, this disclosure is not limited to the above embodiments, and various modifications are possible without departing from the purpose of this disclosure.

[0085] In some embodiments, as shown in Figure 11, the frame 2A(2) includes a first column 4A(4), a second column 4B(4), and a beam 6A(6). Each of the first column 4A and the second column 4B is formed of H-shaped steel. The first column 4A and the second column 4B are arranged side by side in the extending direction of the beam 6. The first column 4A is positioned such that the surface 11a of the flange 11 of the first column 4A (the side closer to the second column 4B in the extending direction of the beam 6) faces the interior 3 of the frame 2. The second column 4B is positioned such that the surface 17a of the web 17 of the second column 4B faces the interior 3 of the frame 2. The beam 6A is positioned such that one end 19a abuts against the surface 11a of the flange 11 of the first column 4A, and the other end 19b abuts against the surface 17a of the web 17 of the second column 4B. In other words, the other end 19c of beam 6A, including the other end 19b, fits into the gap 21 defined by the web 17 and flange 15 of the second column 4B.

[0086] In this case, although not shown, the connecting hardware 10 fixed to the first column 4A is directly attached to the surface 11a of the flange 11 of the first column 4A. The connecting hardware 10 fixed to the second column 4B is attached to the surface 17a of the web 17 of the second column 4B via a base 7 positioned between the second column 4B and the connecting hardware 10. With this configuration, a frame 2A of various external dimensions can be easily formed.

[0087] In the first and second embodiments, the frame 2 was formed of steel, but the disclosure is not limited to this form. The frame reinforcement structure 1 according to the disclosure may also reinforce the frame 2 of a reinforced concrete building.

[0088] <Third Embodiment> A frame reinforcement structure 1 according to the third embodiment of this disclosure will now be described. In the third embodiment, the frame 2 is made of reinforced concrete (RC), and the other components are the same as those described in the first and second embodiments. In the third embodiment, components that are the same as those in the first and second embodiments are denoted by the same reference numerals, and their detailed descriptions are omitted.

[0089] Figure 12 is a schematic front view showing the configuration of a frame 2 according to the third embodiment of this disclosure. As shown in Figure 12, each of the columns 4 and beams 6 constituting the frame 2 is made of reinforced concrete. To reinforce this frame 2, the frame reinforcement structure 1 according to the third embodiment comprises a wooden brace 8 and a connecting metal fitting 10, wherein the obtuse-angled side surface (left side surface 20) of the protruding portion 18 of the wooden brace 8 is configured to abut against the inner wall surface (left inner wall surface 22) within the recess 14 of the connecting metal fitting 10.

[0090] By the way, the method of fixing the connecting hardware 10 to the column 4 or beam 6 is not particularly limited, but if the column 4 is made of reinforced concrete, or if the beam 6 is made of reinforced concrete, the connecting hardware 10 may be fixed to the column 4 or beam 6 by anchor bolts.

[0091] Figure 13 is a perspective view showing the configuration of the connecting hardware 10 according to the third embodiment of this disclosure. As shown in Figure 13, the connecting hardware 10 is fixed to the beam 6 by anchor bolts 120.

[0092] Figure 14 illustrates an example of fixing the connecting hardware 10 to the beam 6. More specifically, as shown in Figure 14, the anchor bolt 120 is configured such that a portion 120a is embedded in the beam 6, and the remaining portion 120b protrudes from the inner surface 5B of the beam 6 toward the interior 3 of the frame 2. In the embodiment illustrated in Figure 14, the portion 120a of the anchor bolt 120 includes a bent portion 120c in which the extending direction of the portion 120a of the anchor bolt 120 is bent, preventing the anchor bolt 120 from coming out of the beam 6. The horizontal portion 91a of the L-shaped member 91 is fixed to the beam 6 by tightening the nut 122 onto the remaining portion 120b of the anchor bolt 120 (the connecting hardware 10 is fixed to the beam 6). In the embodiment illustrated in Figure 14, a washer 124 is placed between the nut 122 and the horizontal portion 91a of the L-shaped member 91.

[0093] <Fourth Embodiment> A frame reinforcement structure 1 according to the fourth embodiment of this disclosure will now be described. In the fourth embodiment, the frame 2 is formed of wood. The other configurations are the same as those described in the first and second embodiments.

[0094] Although not shown, the frame 2 according to the fourth embodiment can use various types of wooden beams and columns, such as structures made of laminated timber or structures with steel or carbon fiber inside. Furthermore, if the building has four or more stories, the frame 2 must be a fire-resistant structure. Also, if the total floor area is 100m² in a fire-prevention zone... 2 When constructing a building exceeding 1500m², and in a quasi-fire prevention zone with a total floor area of ​​1500m² 2 Even when constructing a large building, it is necessary to use a fire-resistant structure. Under these conditions, if planning to use wood, it is necessary to select from fire-resistant wooden construction methods. Fire-resistant wooden construction methods can be mainly classified into three types: membrane-type fire-resistant wooden construction, fire-stopping type fire-resistant wooden construction, and steel-reinforced fire-resistant wooden construction. [Explanation of symbols]

[0095] 1 Frame reinforcement structure 2 Frame 3. Inside the frame 4. Column (First Member) 6. Beam (First Member) 8 Wooden bracing 10. Connecting hardware 14 recess 16. End face of wooden brace 18 Protrusion 20 Left side (side facing the obtuse angle) 22 Left side interior wall surface (interior wall surface) 32. First wooden brace 34. Second wooden brace 56 First cross wooden brace 58 Second cross wooden brace 60. Main body of the first intersecting wooden brace 62. Second Cross Wooden Brace Main Body 64 Third Cross Wooden Brace Main Body 66. Fourth Crossing Wooden Brace Main Body 70 First groove 72 Second groove 74 Third groove 76 4th groove 80 Metal braces 82 Compression force cancellation mechanism 84 1st extension part 86 Second extension part 90 Other end (the other end of the first extension) 92 First through hole 94 One end (one end of the second extension) 96 Pin component 102 First Wooden Brace Main Body 104 Second Wooden Brace Main Body 106 First Storage Space O1 Axis of wooden brace O2 Axis of metal brace

Claims

1. A structural reinforcement structure for reinforcing the framework of a building, At least one wooden brace extending diagonally along the interior of the aforementioned frame, A connecting fitting fixed to a first member constituting the frame, wherein the bottom surface of the connecting fitting is fixed to the inner circumferential surface of the first member by welding or fasteners, The wooden brace includes a projection that protrudes from the tip surface of the wooden brace, The aforementioned connecting hardware includes a recess into which the protruding portion is inserted. When the side where the intersection angle between the wooden brace and the first member is acute is defined as the acute angle side, and the side where the intersection angle with the first member is obtuse is defined as the obtuse angle side, the side surface of the obtuse angle side of the protruding portion is configured to abut against the inner wall surface of the recess. Frame reinforcement structure.

2. The frame reinforcement structure according to claim 1, wherein the connecting hardware is fixed to the frame via a base attached to the frame.

3. The aforementioned at least one wooden brace includes a first wooden brace and a second wooden brace, The protruding portion of the first wooden brace and the protruding portion of the second wooden brace are inserted into the recess of the common connecting hardware. The frame reinforcement structure according to claim 1 or 2.

4. The protruding portion of the first wooden brace abuts against the inner wall surface on one side of the recess of the common connecting hardware, The protruding portion of the second wooden brace abuts against the inner wall surface on the other side of the recess of the common connecting hardware. The frame reinforcement structure according to claim 3.

5. The aforementioned at least one wooden brace includes a first wooden brace and a second wooden brace, The protruding portion of the first wooden brace and the protruding portion of the second wooden brace have the same cross-sectional shape when viewed from the front of the frame. A structural reinforcement structure according to any one of claims 1 to 4.

6. The at least one wooden brace includes a first intersecting wooden brace and a second intersecting wooden brace, which are arranged to intersect each other within the frame. The first cross-timbered brace includes a first cross-timbered brace body and a second cross-timbered brace body laminated on one surface of the first cross-timbered brace body. The second cross-timbered brace includes a third cross-timbered brace body and a fourth cross-timbered brace body laminated on one surface of the third cross-timbered brace body. The first groove formed on the other side of the first cross wooden brace body and the third groove formed on the one side of the third cross wooden brace body are engaged, The second groove formed on the other side of the second cross wooden brace body and the fourth groove formed on the one side of the fourth cross wooden brace body are engaged. A structural reinforcement structure according to any one of claims 1 to 5.

7. The frame further comprises a metal brace extending diagonally through the interior of the frame, The metal brace is positioned along the extending direction of the wooden brace and fixed to the connecting hardware. A structural reinforcement structure according to any one of claims 1 to 6.

8. The metal brace includes a compression force cancellation mechanism configured to cancel the axial compressive force acting on the metal brace. The frame reinforcement structure according to claim 7.

9. The aforementioned metal brace is A first extending portion extending along the axial direction of the metal brace, A second extending portion of the metal brace extending along the axial direction, wherein one end of the second extending portion is configured to be connected to the other end of the first extending portion, The compression force cancellation mechanism is, A first through-hole is formed at one end of the second extension and has an longitudinal shape in the axial direction of the metal brace, A pin member formed at the other end of the first extension and inserted through the first through hole, The frame reinforcement structure according to claim 8.

10. The wooden brace includes a first wooden brace body and a second wooden brace body laminated on the first wooden brace body. The metal brace is positioned between the first wooden brace body and the second wooden brace body. A structural reinforcement structure according to any one of claims 7 to 9.

11. The wooden brace has a storage space formed between the first wooden brace body and the second wooden brace body, extending along the axial direction of the wooden brace. The metal brace is placed in the storage space. The frame reinforcement structure according to claim 10.

12. The aforementioned frame is formed from one of the following: steel frame, reinforced concrete, wood, concrete-filled steel pipe structure, or a combination thereof. A structural reinforcement structure according to any one of claims 1 to 11.

13. A brace structure is arranged to extend diagonally along the interior of the building's frame and is fixed to a first member constituting the frame via a connecting fitting configured such that its bottom surface is fixed to the inner circumferential surface of the first member by welding or fasteners, The aforementioned brace structure consists of wooden braces. The wooden brace has a protruding portion that can be inserted into a recess of the connecting hardware which is formed to protrude from the tip surface of the wooden brace and to open toward the interior of the frame, When the side where the intersection angle between the wooden brace and the first member is acute is defined as the acute angle side, and the side where the intersection angle with the first member is obtuse is defined as the obtuse angle side, the side surface of the obtuse angle side of the protruding portion is configured to abut against the inner wall surface of the recess. Bracing structure.

14. A structural reinforcement structure for reinforcing the framework of a building, At least one wooden brace extending diagonally along the interior of the aforementioned frame, The frame comprises a connecting fitting fixed to a first member constituting the frame, The wooden brace includes a projection that protrudes from the tip surface of the wooden brace, The aforementioned connecting hardware includes a recess into which the protruding portion is inserted. When the side where the intersection angle between the wooden brace and the first member is acute is defined as the acute angle side, and the side where the intersection angle with the first member is obtuse is defined as the obtuse angle side, the obtuse angle side of the protruding portion is configured to abut against the inner wall surface of the recess. The aforementioned at least one wooden brace includes a first wooden brace and a second wooden brace, In the front-rear direction of the frame, the protruding portion of the first wooden brace and the protruding portion of the second wooden brace are offset from each other and inserted into the recess of the common connecting hardware. Frame reinforcement structure.

Images