Architecture reinforcement construction

Abstract

To improve workability at construction sites while ensuring reinforcement effect of a framework even when large seismic forces act on a building.SOLUTION: A framework reinforcement structure for reinforcing a framework of a building comprises: at least one dividing member that extends inside the framework along a vertical direction and divides the inside of the framework into a plurality of regions in a front view of the framework; and at least one wooden brace that extends along a diagonal direction in either one of a pair of adjacent regions out of the plurality of regions inside the framework.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a structural reinforcement structure for reinforcing the structure of a steel-framed 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, due to the resistance of the wooden brace against this compressive force, the shear deformation amount of the structure is reduced.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the technology described in Patent Document 1, since wooden braces are provided throughout the interior of the structure, the workability at the site is low.

[0005] The present disclosure has been made in view of the above problems, and an object thereof is to provide a structural reinforcement structure that can improve the workability at the site while ensuring the reinforcement effect of the structure 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, in a front view of the frame, at least one dividing member that extends vertically through the interior of the frame and divides the interior of the frame into a plurality of regions, and at least one wooden brace that extends diagonally through one of a pair of adjacent regions among the plurality of regions inside the frame.

[0007] According to the configuration described in (1) above, since a wooden brace is installed in one of a pair of areas inside the frame, the other of the pair of areas inside the frame can be secured as a workspace for installing the wooden brace to the frame. This improves on-site constructability.

[0008] (2) In some embodiments, in the configuration described in (1) above, the at least one partitioning member includes two partitioning members that sequentially divide the interior of the frame into a first region, a second region, and a third region along the horizontal direction, and the wooden brace is provided in the second region inside the frame.

[0009] According to the configuration described in (2) above, the first and third regions inside the frame can be secured as workspaces for installing wooden braces in the second region of the frame.

[0010] (3) In some embodiments, in the configuration described in (1) above, the at least one partitioning member includes one partitioning member that sequentially divides the interior of the frame into a left region and a right region along the horizontal direction, and the wooden brace is provided in either the left region or the right region inside the frame.

[0011] According to the configuration described in (3) above, the other of the left and right regions inside the frame can be secured as a workspace for installing wooden braces in either the left or right region inside the frame.

[0012] (4) In some embodiments, the configuration described in any one of (1) to (3) above further comprises a first connecting fitting fixed to a first member constituting the frame, and a metal brace extending along the diagonal direction to one of a pair of adjacent regions among the plurality of regions inside the frame, wherein the metal brace is arranged along the extending direction of the wooden brace and fixed to the first connecting fitting.

[0013] According to the configuration described in (4) above, when a large seismic force acts on the building, the first connecting hardware can pull on the metal brace, allowing the metal brace to function as a tension brace.

[0014] (5) In some embodiments, in the configuration described in (4) 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 positioned between the first wooden brace body and the second wooden brace body.

[0015] According to the configuration described in (5) above, the metal brace is positioned between the first wooden brace body and the second wooden brace body. This allows the wooden brace and the metal brace to be treated as a single component (hybrid brace). Furthermore, the appearance of the hybrid brace can be made to resemble wood grain, thereby improving its aesthetic appeal. [Effects of the Invention]

[0016] According to at least one embodiment of this disclosure, even when a large seismic force acts on a building, it is possible to improve on-site constructability while ensuring the reinforcing effect of the frame. [Brief explanation of the drawing]

[0017] [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] A perspective view showing the configuration of the bonding metal object according to the first embodiment of the present disclosure, with the wooden brace disassembled from the bonding metal object. [Figure 4] A diagram schematically showing the configuration in which the first cross-wood brace and the second cross-wood brace according to the first embodiment of the present disclosure intersect. [Figure 5] A diagram for explaining the effect of the frame reinforcement structure according to the first embodiment of the present disclosure, which is a graph showing the relationship between the compressive force and the amount of deformation. [Figure 6] A diagram schematically showing the configuration of the frame reinforcement structure according to the reference example. [Figure 7] A front view schematically showing the configuration of the frame reinforcement structure according to the second embodiment of the present disclosure. [Figure 8] A perspective view showing the configuration of the bonding metal object according to the second embodiment of the present disclosure. [Figure 9] A diagram schematically showing the configuration of the compressive force canceling mechanism according to the second embodiment of the present disclosure. [Figure 10] A perspective view schematically showing the configuration of the hybrid brace (wooden brace + metal brace) according to the second embodiment of the present disclosure. [Figure 11] A front view of a frame provided with a frame reinforcement structure according to some embodiments of the present disclosure. [Figure 12] A perspective view schematically showing the configuration of a frame according to some embodiments of the present disclosure.

Embodiments for Carrying Out the Invention

[0018] Hereinafter, some embodiments of the present invention will be described with reference to the accompanying 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 thereto, but are merely illustrative examples.

[0019] <First Embodiment><000,0103>(Configuration of the Frame Reinforcement Structure) 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.

[0020] The structural reinforcement structure 1 comprises a partition member 9, a wooden brace 8, a first connecting fitting 10, and a second connecting fitting 13.

[0021] The dividing member 9 extends vertically through 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 in a front view of the frame 2. 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. In addition, the columns 4 and beams 6 may be formed by a combination of steel materials. In this case, the columns 4 and beams 6 may have, for example, a box shape.

[0022] The dividing member 9 divides the interior 3 of the frame 2 into multiple regions. The dividing member 9 is an independent column that connects, for example, the upper beam 6 (ceiling) and the lower beam (floor), but does not bear or bears almost no vertical load acting on the frame 2. In the first embodiment, as illustrated in Figure 1, the frame reinforcement structure 1 includes a left dividing member 9A (9) and a right dividing member 9B (9) provided to the right of the left dividing member in the left-right direction W2. The interior 3 of the frame 2 is divided by the left dividing member 9A and the right dividing member 9B into a first region 3A, a second region 3B, and a third region 3C, in order from the left side in the left-right direction W2 (horizontal direction).

[0023] In the configuration illustrated in Figure 1, in a front view of the frame 2, if we define O3 as the center line passing through the center of the frame 2 in the left-right direction W2, then the left-side partition member 9A is located on the opposite side of the center line O3 from the right-side partition member 9B. Furthermore, the distance from the center line O3 to the left-side partition member 9A is equal to the distance from the center line O3 to the right-side partition member 9B. In other words, the first region 3A is symmetrical to the third region 3C with respect to the center line O3.

[0024] The wooden brace 8 is positioned to extend diagonally along one of two adjacent regions (first region 3A, second region 3B, third region 3C) within the interior 3 of the frame 2. In the first embodiment, as illustrated in Figure 1, the wooden brace 8 is positioned in the second region 3B of the interior 3 of the frame 2, but not in the first region 3A or the third region 3C. The wooden brace 8 extends upward from left to right, or downward from left to right, within the second region 3B of the interior 3 of the frame 2. In another embodiment, the wooden brace 8 may be positioned in both the first region 3A and the third region 3C of the interior 3 of the frame 2. In this case, the wooden brace 8 is not positioned in the second region 3B.

[0025] In the exemplary embodiment shown in Figure 1, in a front view of the frame 2, multiple wooden braces 8 (the first wooden brace 32 and the second wooden brace 34, described later) are provided so that the second region 3B of the interior 3 of the frame 2 is divided into a grid pattern. In the exemplary embodiment shown in Figure 1, the frame reinforcement structure 1 is described in a case where both the first wooden brace 32 and the second wooden brace 34 are provided in the second region 3B of the interior 3 of the frame 2, but this disclosure is not limited to this embodiment. The frame reinforcement structure 1 may be configured so that either the first wooden brace 32 or the second wooden brace 34 is provided in the second region 3B of the interior 3 of the frame 2, and the other is not provided (the wooden braces 8 may be arranged in a single-slope configuration).

[0026] The first 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 first 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 first connecting hardware 10 is fixed to the beam 6 and protrudes toward the interior 3 of the frame 2 from the inner surface 5 of the outer surface of the beam 6 that faces the second region 3B of the interior 3 of the frame 2. The first connecting hardware 10 fixed to the beam 6 is directly attached to the inner surface 5 of the beam 6. The protruding surface 12 of the first connecting hardware 10 has a recess 14 formed therein that is recessed toward the opposite side of the interior 3 of the frame 2 (i.e., toward the beam 6 side). The wooden brace 8 includes a projection 18 that protrudes toward the opposite side of the interior 3 of the frame 2 from the tip surface 16 of the wooden brace 8. This protruding portion 18 is configured to be insertable into the recess 14 of the first connecting hardware 10.

[0027] Referring to Figure 2, the part in which the wooden brace 8 and the beam 6 are joined by the first connecting hardware 10 will be described. In the exemplary form shown in Figure 2, the first connecting hardware 10 protrudes upward from the inner surface 5 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 described. In some embodiments, the first connecting hardware 10 may be a first connecting hardware 10 that joins the column 4 and the wooden brace 8.

[0028] 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".

[0029] 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 first connecting hardware 10. In this embodiment, the tip surface 16 of the wooden brace 8 and the projection surface 12 of the first connecting hardware 10 are configured to be parallel to each other with the inner surface 5 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 first connecting hardware 10.

[0030] The first connecting fitting 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.

[0031] 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 between it and the bottom surface 28 of the recess 14 increases from left to right. In this case, the left side surface 20 of the projection 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 from left to right.

[0032] 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.

[0033] 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 first connecting hardware 10.

[0034] Here, with reference to Figure 3, an example of the configuration of the first connecting hardware 10 will be described. The first 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 5 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.

[0035] The left wall-forming portion 44 includes an upwardly extending portion 48 extending upward from the inner surface 5 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 first 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).

[0036] The right-side wall-forming portion 46 includes an upwardly extending portion 52 extending upward from the inner surface 5 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 first connecting hardware 10 described above (the protruding surface 12 on the side that abuts 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.

[0037] 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 first connecting hardware 10 when it is inserted into the recess 14 of the common first 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 first connecting hardware 10 when it is inserted into the recess 14 of the common first 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 first connecting hardware 10 with a staggered position relative to each other. 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 first 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 first connecting hardware 10, and the second wooden brace 34 extends to the left from the common first 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).

[0038] 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 in the second region 3B inside the frame 2. Referring to Figure 4, the 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.

[0039] 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.

[0040] 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.

[0041] 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).

[0042] 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).

[0043] 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.

[0044] Next, the second connecting fitting 13 will be described. As shown in Figure 1, the second connecting fitting 13 is fixed to the partition member 9. The second connecting fitting 13 may be fixed to the partition member 9 by welding, for example, or by fasteners such as high-strength bolts.

[0045] The second connecting hardware 13 is configured similarly to the first connecting hardware 10 described above, except that it is fixed to the dividing member 9. As shown in Figure 1, the second connecting hardware 13 includes a recess 27 into which a projection 25 is inserted, which protrudes from the end surface 23 of the wooden brace 8 opposite to the end surface 16 toward the side opposite to the interior 3 of the frame 2. The upper surface 29 of the projection 25 then abuts against the upper inner wall surface 31 within the recess 27.

[0046] (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 is not provided with a protrusion that is inserted into the recess of the first connecting hardware 010, and the tip surface 016 of the wooden brace 08 and the protruding surface 012 of the first connecting hardware 010 are in contact. The tip surface 016 of the wooden brace 08 and the protruding surface 012 of the first connecting hardware 010 intersect perpendicularly with respect to the axis O direction of the wooden brace 08.

[0047] 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 into the first connecting hardware 10 before the wooden brace 8 buckles. As a result, the compressive force acting on the wooden brace 8 does not increase any further, and only the deformation of the frame 2 increases.

[0048] 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 first connecting hardware 10 to the wooden brace 8 becomes large, the left side surface 20 of the protrusion 18 and the left inner wall surface 22 within the recess 14 of the first connecting hardware 10 are in contact, so the protrusion 18 of the wooden brace 8 can be embedded into the first connecting hardware 10 before the wooden brace 8 buckles. Even if the protrusion 18 of the wooden brace 8 is embedded into the first connecting hardware 10, 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.

[0049] The second connecting hardware 13 exhibits the same function and effect as the first connecting hardware 10. According to the configuration of the frame reinforcement structure 1 according to the first embodiment of this disclosure, even when a large seismic force acts on the building and the compressive force transmitted from the second connecting hardware 13 to the wooden brace 8 becomes large, the upper surface 29 of the protruding portion 25 and the upper inner wall surface 31 in the recess 27 of the second connecting hardware 13 are in contact, so the protruding portion 25 of the wooden brace 8 can be embedded into the second connecting hardware 13 before the wooden brace 8 buckles. Even if the protruding portion 18 of the wooden brace 8 is embedded into the second connecting hardware 13, the wooden brace 8 can still perform a certain function as a compression brace. Therefore, even when a large seismic force acts on the building, buckling of the wooden brace 8 can be avoided and the ductility of the building can be improved.

[0050] As illustrated in Figure 1, the wooden brace 8 is placed in the second region 3B of the interior 3 of the frame 2, while the wooden brace 8 is not placed in the first region 3A and the third region 3C. Therefore, the first region 3A and the third region 3C can be reserved as workspace for installing the wooden brace 8 in the second region 3B of the frame 2. This improves on-site constructability. Furthermore, compared to the case where the wooden brace 8 is placed throughout the entire interior 3 of the frame 2, the number of wooden braces 8 can be reduced, thus reducing manufacturing costs.

[0051] 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 first connecting hardware 10, thus reducing the number of first connecting hardware 10 fixed to the frame 2.

[0052] 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 first connecting hardware 10 from different directions. Therefore, when an earthquake force acts on the building, forces do not act simultaneously on the common first connecting hardware 10 from the first wooden brace 32 and the second wooden brace 34. For this reason, damage to the first 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 first connecting hardware 10 from the same direction.

[0053] 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.

[0054] 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.

[0055] <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.

[0056] As shown in Figure 7, the frame reinforcement structure 1 further comprises a metal brace 80 extending diagonally along the interior 3 of the frame 2. The metal brace 80 is made of metal. The metal brace 80 is fixed to the first 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 within the wooden brace 8, and a so-called hybrid brace made of a combination of different materials is provided in the second region 3B of the interior 3 of the frame 2. The metal brace 80 is fixed to the first connecting hardware 10 by fastening one end 84a of the metal brace 80 to the first connecting hardware 10 with a fastener 85 such as a bolt. Furthermore, the other end 84b of the metal brace 80 may be fastened to the second connecting hardware 13 by fasteners 85 such as bolts, or it may be fastened to a first connecting hardware 10 different from the first connecting hardware 10 to which one end 84a of the metal brace 80 is fastened. Moreover, this disclosure is not limited to this embodiment, and the metal brace 80 may be fixed to the first connecting hardware 10 by methods other than fixing by fasteners 85.

[0057] Referring to Figure 8, an example of the configuration of the first connecting hardware 10 for fixing the metal brace 80 to the first 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. Note that the configuration of the first connecting hardware 10 illustrated in Figure 8 can also be applied to the second connecting hardware 13.

[0058] The first 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 first 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 first 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 5 of the beam 6 via the L-shaped member 91.

[0059] Furthermore, in the exemplary embodiment shown in Figure 8, the first 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 5 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).

[0060] In addition, Figure 8 shows an example in which one wooden brace 8 and one metal brace 80 are fixed to the first connecting hardware 10. However, as shown in Figure 7, another wooden brace 8 and one metal brace 80 may also be attached to the first connecting hardware 10 from directions that are symmetrical with respect to the position of the through-hole 91c of the first connecting hardware 10. In this case, the two metal braces 80 are fixed at the position of the through-hole 91c of the first connecting hardware 10 by a common fastener 85. The insertion of the two wooden braces 8 into the first connecting hardware 10 is the same as the structure shown in Figure 3.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] The first wooden brace body 102(60) illustrated in Figure 10 is a further limited configuration of the first cross wooden brace body 60 described in the first embodiment. Similarly, the second wooden brace body 104(62) illustrated in Figure 10 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.

[0066] As illustrated in Figure 10, 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).

[0067] 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.

[0068] 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.

[0069] (Effects / Actions) According to the second embodiment, when a large seismic force acts on a building, the first 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.

[0070] 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.

[0071] 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.

[0072] In the first and second embodiments, the interior 3 of the frame 2 was divided into three regions (first region 3A, second region 3B, and third region 3C) by two dividing members 9 (left dividing member 9A and right dividing member 9B), but the disclosure is not limited to this form. The frame reinforcement structure 1 may have one or more dividing members 9 as long as the interior 3 of the frame 2 is divided into multiple regions.

[0073] In some embodiments, as shown in Figure 11, the frame reinforcement structure 1 includes a single partitioning member 9, and the interior 3 of the frame 2 is divided by this single partitioning member 9 into a left region 3D and a right region 3E along the left-right direction W2. The left region 3D and the right region 3E are adjacent to each other in the left-right direction W2, with the left region 3D being located to the left of the right region 3E. In the embodiment illustrated in Figure 11, a wooden brace 8 is placed in the right region 3E, but not in the left region 3D. In other words, of a pair of adjacent regions (left region 3D and right region 3E) in the left-right direction W2, a wooden brace 8 is placed in the right region 3E, and not in the left region 3D. According to the configuration illustrated in Figure 11, the left region 3D can be secured as a workspace for installing the wooden brace 8 in the right region 3E. In another embodiment, the wooden brace 8 may not be placed in the right-side region 3E, but may be placed in the left-side region 3D.

[0074] The frame 2 is not limited to the configurations illustrated in the first and second embodiments. In some embodiments, as shown in Figure 12, 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 also 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.

[0075] In this case, although not shown, the first connecting fitting 10 fixed to the first column 4A is directly attached to the surface 11a of the flange 11 of the first column 4A. The first connecting fitting 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. With this configuration, a frame 2A of various external dimensions can be easily formed. [Explanation of symbols]

[0076] 1 Frame reinforcement structure 2 Frame 3. Inside the frame 4. Column (First Member) 6. Beam (First Member) 8 Wooden bracing 9. Dividing member 10. First connecting hardware 13. Second 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, The frame consists of a pair of columns arranged side by side in the left-right direction of the building, and a pair of beams connected to each of the pair of columns and arranged side by side in the vertical direction of the building. In a front view of the frame, at least one dividing member extends vertically through the interior of the frame and divides the interior of the frame into multiple regions, The frame comprises at least one wooden brace extending diagonally along one of a pair of adjacent regions within the aforementioned multiple regions, The aforementioned at least one wooden brace is A timber brace at the end of a region, one end of which is connected to the dividing member and the other end of which is connected to one of the pair of beams that constitute the frame, or It includes at least one of the inter-beam wooden braces, one end of which is connected to the upper beam of a pair of beams constituting the frame, and the other end of which is connected to the lower beam of the pair of beams. Frame reinforcement structure.

2. The at least one partitioning member includes two partitioning members that sequentially divide the interior of the frame into a first region, a second region, and a third region along the horizontal direction. The wooden brace is provided in the second region inside the frame. The frame reinforcement structure according to claim 1.

3. The at least one partitioning member includes one partitioning member that sequentially divides the interior of the frame into a left region and a right region along the horizontal direction, The wooden brace is provided in either the left-side region or the right-side region within the frame. The frame reinforcement structure according to claim 1.

4. A first connecting fitting fixed to the column or beam constituting the frame, The frame further comprises a metal brace extending diagonally along one of a pair of adjacent regions from among the multiple regions within the frame, The metal brace is positioned along the extending direction of the wooden brace and fixed to the first connecting hardware. A structural reinforcement structure according to any one of claims 1 to 3.

5. 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. The frame reinforcement structure according to claim 4.

6. The at least one wooden brace is A first cross-timbered brace comprising a first timbered brace body and a second timbered brace body having one side of the first timbered brace body laminated to the other side, A second intersecting wooden brace extending diagonally to intersect with a first intersecting wooden brace, the second intersecting wooden brace comprising a third wooden brace body and a fourth wooden brace body having one side of the third wooden brace body laminated to the other side, including, A structural reinforcement structure according to any one of claims 1 to 3.

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