JP6675635B2 - Earthquake-resistant member and method of mounting earthquake-resistant member - Google Patents

Description

  The technology disclosed in the present specification relates to an earthquake-resistant member.

  BACKGROUND ART As an anti-seismic member for reinforcing an existing wooden building with earthquake resistance, a brace attached to an existing structure surrounded by columns and beams is known (see Patent Document 1).

JP 2014-95260 A

  In an existing wooden building, a hole-down bolt penetrating a base or a beam may be fixed to the column with a hole-down hardware in order to prevent the column from coming off the beam during an earthquake or the like. When attaching a brace to an existing structure with a hole-down bolt, if the width of the column and beam is not sufficient, apply a plate to the column and beam to increase the width of the column and beam. You may not be able to place a brace without interference. Placing a patch on a column or beam will change the position of the column and beam of the existing wooden building, for example, the space inside the existing wooden building will be narrowed, or the appearance of the existing wooden building will change Is not preferred. Such problems are not limited to the case where the brace is attached to the existing structure where the hole down bolt is attached, but the case where the hole down bolt is attached to the existing structure where the brace is attached or the existing structure where the seismic member is not attached. This is also a common problem when attaching bracing and hole-down bolts to the structure. In addition, such a problem is not limited to the case where seismic members are additionally attached to an existing wooden building to reinforce the seismic resistance, but also to the case where a seismic member is attached to a newly constructed wooden structure to have seismic strength. It is a problem.

  This specification discloses a technique capable of solving at least a part of the above-described problem.

(1) An earthquake-resistant member disclosed in the present specification is an earthquake-resistant member attached to a wooden building, which is attached to a connection between a pillar and a beam of the wooden building, and penetrates the beam in a vertical direction. A brace having a second through hole formed therein through which the hole-down bolt fixed to the pillar is inserted through the first through hole, and a first orthogonal to the axial direction of the pillar and the axial direction of the beam. A reinforcing member that is attached to a side surface of the brace in the direction, and covers a specific region in which the second through hole is projected in the first direction with respect to the side surface. According to this earthquake-resistant member, the second through-hole into which the hole-down bolt is inserted is formed in the brace attached to the connection between the column and the beam. Therefore, in this earthquake-resistant member, the hole-down bolt can be made to penetrate the second through-hole, and in the first direction, that is, in the width direction of the column and the beam, the bracing and the hole-down bolt can be arranged at a position overlapping with the hole-down bolt. it can. Therefore, if the width of the columns and beams is larger than the sum of the width of the braces and the thickness of the reinforcing members, attach the braces to the joints where the hole-down bolts are attached without applying a patch to the columns and beams. It is possible to prevent the pillar position and the beam position of the wooden building from changing. Further, when the second through hole is formed in the brace, the strength of the brace is reduced as compared with when the second through hole is not formed. However, the earthquake-resistant member is attached to the side surface in the first direction of the brace, and Since the reinforcing member that covers the region is provided, the strength of the brace reduced by the formation of the second through hole can be compensated for by the reinforcing member, and the earthquake-resistant member can have sufficient earthquake-resistant strength.

(2) An anti-seismic member disclosed in the present specification is an anti-seismic member attached to a wooden building, wherein the first through-hole vertically penetrates a beam of the wooden building, and a pillar of the wooden building. A second through-hole formed in a brace attached to a connection portion between the first through-hole and the second through-hole formed at a position corresponding to the first through-hole; And a hole-down bolt fixed to the brace, attached to a side surface of the brace in a first direction orthogonal to an axial direction of the column and an axial direction of the beam, and the second through-hole is provided in the first direction with respect to the side surface. A reinforcing member that covers the specific area projected in the direction. According to this earthquake-resistant member, the second through-hole into which the hole-down bolt is inserted is formed in the brace attached to the connection between the column and the beam. Therefore, in this earthquake-resistant member, the hole-down bolt can be made to penetrate the second through-hole, and in the first direction, that is, in the width direction of the column and the beam, the bracing and the hole-down bolt can be arranged at a position overlapping with the hole-down bolt. it can. Therefore, if the width of the columns and beams is larger than the sum of the width of the braces and the thickness of the reinforcing members, attach the braces to the joints where the hole-down bolts are attached without applying a patch to the columns and beams. It is possible to prevent the pillar position and the beam position of the wooden building from changing. Further, when the second through hole is formed in the brace, the strength of the brace is reduced as compared with when the second through hole is not formed. However, the earthquake-resistant member is attached to the side surface in the first direction of the brace, and Since the reinforcing member that covers the region is provided, the strength of the brace reduced by the formation of the second through hole can be compensated for by the reinforcing member, and the earthquake-resistant member can have sufficient earthquake-resistant strength.

(3) In the above-described earthquake-resistant member, the reinforcing member includes a covering portion that covers the specific region, a first extending portion that extends from the covering portion to one side in the axial direction of the beam, and a reinforcing member that covers the beam from the covering portion. A second extension portion extending to the other side in the axial direction, wherein the earthquake-resistant member is further inserted into a first mounting hole formed in the first extension portion to fix the reinforcing member to the brace. The first fixing member may be configured to include a first fixing member that is inserted into a second attachment hole formed in the second extending portion, and a second fixing member that fixes the reinforcing member to the brace. According to this earthquake-resistant member, the reinforcing members are fixed to the brace on both sides of the beam in the specific area in the axial direction, so that the strength of the brace having the second through hole can be surely supplemented by the reinforcing member.

(4) In the above-described earthquake-resistant member, the reinforcing member has a flat plate shape, and a size of the reinforcing member in the first direction is (a size of the reinforcing member in the first direction) ≧ (the second penetration). A configuration that satisfies the relationship of the diameter of the hole in the first direction / (the ratio of the design reference strength of the reinforcing member to the design reference strength of the brace) may be employed. According to this earthquake-resistant member, when the relationship X is satisfied, the total strength obtained by combining the design standard strength of the brace with the second through-hole and the design standard strength of the reinforcing member is obtained when the second through-hole is not formed. Can be equal to or higher than the design reference strength of the brace.

(5) In the above-mentioned earthquake-resistant member, further, a brace-side attachment portion attached to the side surface of the brace in the first direction, a column-side attachment portion attached to the brace-side side surface of the column, and the brace-side attachment portion. A brace fixing member including a connecting portion connecting the column-side mounting portion and the column-side mounting portion, wherein the column-side mounting portion includes an intermediate arrangement portion located between the column and the brace in the axial direction of the beam. It may be configured. According to this earthquake-resistant member, the brace can be fixed to the pillar by the brace fixing member. In addition, since the column-side mounting portion of the bracing fixing member includes an intermediate portion located between the column and the bracing, for example, the width of the column or the beam, the width of the bracing, the thickness of the reinforcing member, and the bracing fixed. Even in the case where the sum is equal to the sum of the members and the brace-side attachment portions, the column-side attachment portions can be attached to the brace-side side surfaces of the pillars by using the intermediate arrangement portion without applying a backing plate to the columns and beams.

(6) In the above-mentioned earthquake-resistant member, the reinforcing member is attached to one side surface of the brace in the first direction, and the brace-side attachment portion is provided on the other side surface of the brace in the first direction. It is good also as a structure attached to. According to this earthquake-resistant member, since the reinforcing member and the brace-side attachment portion are attached to different side faces of the brace in the first direction, the reinforcement member and the brace-side attachment portion are arranged so as to face each other with the brace therebetween. The reinforcing member and the brace-side mounting portion can be attached to the brace.

(7) The method of attaching an earthquake-resistant member disclosed in the present specification is a method of attaching an earthquake-resistant member to attach a seismic member to a wooden building, wherein the joint between a pillar and a beam of the wooden building has A second through hole is formed at a position corresponding to the first through hole penetrating the beam in the vertical direction, and the second through hole is formed on a side surface in a first direction orthogonal to the axial direction of the column and the axial direction of the beam. Installing a brace attached with a reinforcing member that covers a specific area where the hole is projected in the first direction with respect to the side surface, and inserting a hole down bolt into the first through hole and the second through hole; Fixing the hole-down bolt to the column. According to the method of attaching the earthquake-resistant member, the second through hole into which the hole-down bolt is inserted is formed in the brace attached to the connection between the column and the beam. Therefore, in the step of fixing the hole-down bolt to the column, the hole-down bolt can be passed through the second through hole, and the bracing and the hole-down bolt overlap in the first direction, that is, in the width direction of the column and the beam. Position. Therefore, if the width of the column and the beam is larger than the sum of the width of the brace and the thickness of the reinforcing member, in the process of installing the brace, the hole-down bolt is attached to the column and the beam without attaching a plate. It can be installed at the mouth, and it is possible to prevent the pillar position and the beam position of the wooden building from changing. Further, since the earthquake-resistant member is provided with a reinforcing member attached to the side surface in the first direction of the brace and covering the specific region, the strength of the brace reduced by the formation of the second through hole can be compensated by the reinforcing member, The seismic member can have sufficient seismic strength.

(8) The method of attaching an earthquake-resistant member disclosed in this specification is a method of attaching an earthquake-resistant member to a wooden building, the method being attached to a connection between a pillar and a beam of the wooden building. Forming a second through-hole at a position corresponding to a first through-hole penetrating the beam in the up-down direction, in a first direction perpendicular to the axial direction of the column and the axial direction of the beam. Attaching a reinforcing member to the side surface to cover the specific area where the second through hole is projected in the first direction with respect to the side surface, and inserting a hole down bolt into the first through hole and the second through hole. Fixing the hole-down bolt to the column. According to the method of attaching the seismic member, according to the method of attaching the seismic member, the second through hole into which the hole down bolt is inserted is formed in the brace attached to the connection between the column and the beam. . Therefore, in the step of fixing the hole-down bolt to the column, the hole-down bolt can be passed through the second through hole, and the bracing and the hole-down bolt overlap in the first direction, that is, in the width direction of the column and the beam. Position. Therefore, if the width of the column and the beam is larger than the sum of the width of the brace and the thickness of the reinforcing member, in the process of installing the brace, the hole-down bolt is attached to the column and the beam without attaching a plate. It can be installed at the mouth, and it is possible to prevent the pillar position and the beam position of the wooden building from changing. Further, since the earthquake-resistant member is provided with a reinforcing member attached to the side surface in the first direction of the brace and covering the specific region, the strength of the brace reduced by the formation of the second through hole can be compensated by the reinforcing member, The seismic member can have sufficient seismic strength.

  The technology disclosed in the present specification can be realized in various forms, for example, in a form of a method of manufacturing an earthquake-resistant member.

It is explanatory drawing which shows the structure of the existing building 1 roughly. It is explanatory drawing which shows the detailed structure of the existing building 1 roughly. It is explanatory drawing which shows the detailed structure of the existing building 1 roughly. It is explanatory drawing which shows roughly the detailed structure of the existing building 1 before the earthquake-resistant member 80 is attached. It is explanatory drawing which shows an installation process. It is explanatory drawing which shows a fixing process.

A. Embodiment:
A-1. Configuration of the earthquake-resistant member 80:
FIG. 1 is an explanatory diagram schematically showing a configuration of an existing wooden building 1 in which an earthquake-resistant member 80 according to the present embodiment is additionally attached and reinforced by earthquake resistance. FIG. 1 shows mutually orthogonal XYZ axes for specifying a direction. In the present specification, for convenience, the positive direction of the X axis is referred to as a right direction, the negative direction of the X axis is referred to as a left direction, the positive direction of the Y axis is referred to as a forward direction, the negative direction of the Y axis is referred to as a rear direction, and Z The positive direction of the axis is referred to as an upward direction, and the negative direction of the Z axis is referred to as a downward direction. The same applies to FIG. 2 and subsequent figures. The front-back direction (Y-axis direction) is an example of a first direction.

  The existing building 1 is a two-story wooden building, and a plurality of pillars 10 installed between the foundation 2 and the roof 3 such that the axial direction is the vertical direction (Z-axis direction), It includes a plurality of beams 20 installed so that the directions are in the left-right direction (X-axis direction), and an earthquake-resistant member 80 including a plurality of braces 30. The plurality of braces 30 are added to the existing building 1 after the existing building 1 is constructed. Each brace 30 is installed on a diagonal line of the existing structure formed by two adjacent columns 10 and two adjacent beams 20 in order to improve the seismic strength of the existing building 1. Hereinafter, the seismic member 80 including the brace 30 will be described. In the following description, in order to avoid redundant description, the description will be focused on a portion surrounded by a dotted line M in FIG. In addition, although the brace 30 is installed from the right and left both sides of the pillar 10 in the part surrounded by the dotted line M, the structure on the right side of the pillar 10 will be described in order to avoid redundant description, and the structure on the left side of the pillar 10 will be described. Will not be described and will not be described in the drawings.

  2 and 3 are explanatory diagrams schematically showing the detailed configuration of the existing building 1. FIG. FIG. 2 shows an enlarged view of the configuration of the hole-down member 40 and the earthquake-resistant member 80 of the existing building 1 as viewed from the negative direction of the Y-axis at a portion surrounded by a dotted line M in FIG. FIG. 3 is an enlarged view of the configuration of the earthquake-resistant member 80 when a portion surrounded by a dotted line M in FIG. 1 is viewed from the positive X-axis direction. The screw bolt 72 is an example of a first fixing member, and the screw bolt 74 is an example of a second fixing member.

  The earthquake-resistant member 80 includes a hole-down member 40, a brace 30, a reinforcing member 50, a brace fixing member 60, and screw bolts 72, 74, 76, 78. The hole-down member 40 fixes the column 10 and the beam 20 in order to prevent the column 10 from coming off the beam 20 during an earthquake or the like. The hole-down member 40 includes a hole-down hardware 41, a hole-down bolt 44, a washer 46, and nuts 48A and 48B. The hole-down metal member 41 is made of steel, and includes a flat plate portion 42 and a through portion 43 in which a through-hole into which the hole-down bolt 44 is inserted is formed. In a state where the through portion 43 of the hole-down metal member 41 is located directly above the first through hole 22 formed in the beam 20, the flat plate portion 42 is screwed to the right side surface 12, that is, the side surface of the brace 30 side. By doing so, the hole-down hardware 41 is fixed to the pillar 10.

  The hole-down bolt 44 has an upper side through a through-hole formed in the through-hole 43 of the hole-down hardware 41, a second through-hole 36 formed in the brace 30, and a first through-hole 22 formed in the beam 20. From this order. When fixing the hole-down bolt 44, the nut 48 </ b> A screwed into the thread of the hole-down bolt 44 from above the penetrating portion 43 of the hole-down hardware 41 and the hole from below the first through-hole 22 of the beam 20. The nut 48 </ b> B screwed to the thread of the down bolt 44 is tightened. Thus, the hole-down bolt 44 is fixed to the column 10 by being fixed to the hole-down hardware 41 by the nut 48A, and is fixed to the beam 20 by the washer 46 and the nut 48B. As a result, the pillar 10 and the beam 20 are fixed via the hole down bolt 44.

  The brace 30 is attached to the connection 24 between the pillar 10 and the beam 20. More specifically, the left side surface 32 of the brace 30 contacts the pillar 10, and the bottom surface 33 of the brace 30 contacts the beam 20. A second through hole 36 is formed in the brace 30. The second through hole 36 is formed so as to penetrate the brace 30 in the up-down direction (Z-axis direction) when the brace 30 is attached to the connection portion 24. The second through hole 36 is arranged at a position different from the bottom surface 33 of the brace 30 in the left-right direction (X-axis direction). That is, the second through hole 36 does not interfere with the bottom surface 33 of the brace 30. The second through hole 36 is formed at a position directly above the first through hole 22 that penetrates the beam 20 in the up-down direction in the mounted state. The hole diameter W2 (see FIG. 3) of the second through-hole 36 in the front-rear direction (Y-axis direction) and the hole diameter of the first through-hole 22 are larger than the diameter of the hole-down bolt 44. For example, the hole diameter W2 of the second through-hole 36 is 18 mm, and the diameter of the hole-down bolt 44 is 16 mm. The second through hole 36 is provided at a position 45 mm from the left side surface 32 of the brace 30 in the left-right direction.

  The reinforcing member 50 is a steel plate. The reinforcing member 50 is attached to the rear side surface 34 of the two side surfaces 34 and 35 of the brace 30 in the front-rear direction (Y-axis direction). The reinforcement member 50 is a part of the rear side surface 34 and covers a specific region 38 (shown by hatching in FIG. 2) in which the second through hole 36 is projected in the front-rear direction with respect to the rear side surface 34. It includes a covering portion 52, a first extending portion 54 extending rightward from the covering portion 52, and a second extending portion 55 located leftward from the covering portion 52. The reinforcing member 50 includes the covering portion 52 to reinforce the cross-sectional defect of the brace 30 due to the formation of the second through-hole 36.

  The upper surface of the reinforcing member 50 has a shape along the upper surface of the brace 30, and the lower surface of the reinforcing member 50 has a shape along the lower surface of the brace 30. The first extending portion 54 has a first mounting hole 56 into which the screw bolt 72 is inserted. The second extending portion 55 has a second mounting hole 57 into which the screw bolt 74 is inserted. The first mounting hole 56 and the second mounting hole 57 are formed at positions where the screw bolts 72 and 74 and the hole down bolt 44 do not interfere. When fixing the reinforcing member 50, the screw bolt 72 is inserted into the first mounting hole 56, the screw bolt 74 is inserted into the second mounting hole 57, and the screw bolts 72, 74 are screwed into the brace 30. Thus, the reinforcing member 50 is fixed to the rear side surface 34 of the brace 30 with the covering portion 52 covering the specific region 38.

The dimension W1 (see FIG. 3), which is the thickness in the front-rear direction (Y-axis direction) of the reinforcing member 50, is set to a thickness sufficient to compensate for the decrease in strength of the brace 30 due to the formation of the second through-hole 36. Is set to Specifically, assuming that the strength ratio P is the ratio of the design reference strength of the reinforcing member 50 to the design reference strength of the brace 30, the dimension W1 is equal to the hole diameter W2 of the second through hole 36 in the front-rear direction and the strength ratio P. Are set so as to satisfy the following relationship X, which is the relationship of The “design reference strength” refers to a strength against a tensile load or a compressive load, and the strength ratio P is, for example, 15. The dimension W1 is, for example, 2.3 mm.
W1> W2 / P ... X

  The brace fixing member 60 is an L-shaped steel plate for fixing the brace 30 to the column 10. The reinforcing member 50 includes a brace-side mounting portion 62 and a column-side mounting portion 66. The brace side attachment portion 62 is one flat plate of an L-shaped plate, and is attached to the front side surface 35 of the brace 30. That is, the brace-side attachment portion 62 is attached to the side surface (the front side surface 35) opposite to the rear side surface 34 to which the reinforcing member 50 is attached in the front-rear direction (Y-axis direction). Specifically, a part of the brace-side attachment portion 62 is disposed at a position facing the reinforcing member 50 via the brace 30 in the front-rear direction. For this reason, the brace fixing member 60 is arranged at a position where the screw bolt 76 that is screwed into the brace 30 through the brace side attachment hole 64 formed in the brace side attachment portion 62 does not interfere with the screw bolt 72.

  The column-side attachment portion 66 is the other flat plate of the L-shaped plate, and is attached to the right side surface 12 of the column 10, that is, the side surface of the column 10 on the side of the brace 30. As shown in FIG. 3, the column-side mounting portion 66 is connected to the left end of the brace-side mounting portion 62, and is bent rearward (in the negative Y-axis direction) from the left end of the brace-side mounting portion 62. In the direction (X-axis direction), it is located between the pillar 10 and the brace 30 (see FIG. 2). The column-side mounting portion 66 is formed with a column-side mounting hole 68 through which a screw bolt 78 for mounting the column-side mounting portion 66 to the right side surface 12 of the column 10 penetrates. The pillar side mounting hole 68 is located between the pillar 10 and the brace 30 in the left-right direction. Therefore, the screw bolt 78 is located in a part of the right side surface 12 in the facing region 14 where the column 10 faces the brace 30 in the left-right direction, that is, in the region where the column 10 and the brace 30 overlap in FIG. It is screwed into the pillar 10. The entire pillar-side mounting portion 66 is an example of an intermediate arrangement portion, and the left end of the brace-side mounting portion 62 is an example of a connecting portion.

  As shown in FIG. 3, a dimension W6 in the front-rear direction (Y-axis direction) of the column 10 and a dimension W7 in the front-rear direction of the beam 20 are earthquake-resistant including the brace 30, the reinforcing member 50, the brace fixing member 60, and the like. It is larger than the maximum dimension W5 of the member 80 in the front-rear direction. Specifically, the maximum dimension W5 is obtained by adding the dimension W1 of the reinforcing member 50 in the front-rear direction, the dimension W3 of the brace 30 in the front-rear direction, and the dimension W4 of the brace-side mounting portion 62 in the front-rear direction. On the other hand, in the present embodiment, the diameter of the hole-down bolt 44 and the dimension in the front-rear direction of the column-side mounting portion 66 are arranged at positions overlapping the brace 30 in the front-rear direction, and thus do not affect the maximum dimension W5. .

A-2. How to attach the earthquake-resistant member 80:
Next, a method of attaching the earthquake-resistant member 80 to the existing building 1 (hereinafter, simply referred to as “attachment method”) will be described. FIG. 4 is an explanatory diagram schematically showing a detailed configuration of the existing building 1 before the earthquake-resistant member 80 is attached. In the present embodiment, a description will be given of a method of attaching the seismic member 80 to an existing building 1 (see FIG. 4) to which the seismic member 80 such as the hole-down member 40 and the brace 30 is not attached. In the mounting method of the present embodiment, a manufacturing process, a removing process, an installing process, a fixing process, and a mounting process are performed in this order. Hereinafter, each step will be described.

(Production process)
In the mounting method of the present embodiment, first, a manufacturing process is performed. In the manufacturing process, first, the beam 20 is processed, and the first through hole 22 is formed in the beam 20. Next, a brace is manufactured based on the existing structure of the existing building 1, and the second through hole 36 is formed in the manufactured brace 30. Next, a reinforcing member 50 prepared in advance by screw bolts 72 and 74 is attached to the rear side surface 34 of the brace 30 in which the second through holes 36 are formed. Thereby, the brace 30 to which the second through hole 36 is formed and the reinforcing member 50 is attached is manufactured (see FIG. 5). The reinforcing member 50 may be prepared by processing a steel plate, or may be prepared from a commercially available product.

(Installation process)
Next, an installation process is performed. FIG. 5 is an explanatory diagram illustrating an installation process. In the installation process, the brace 30 manufactured in the manufacturing process is installed in the connection portion 24 between the pillar 10 and the beam 20. Thereby, the second through-hole 36 formed in the brace 30 is disposed at a position directly above the first through-hole 22 formed in the beam 20 in the up-down direction (Z-axis direction).

(Fixing process)
Next, a fixing step is performed. FIG. 6 is an explanatory diagram showing the fixing step. In the fixing step, the brace 30 is fixed to the column 10 by the brace fixing member 60. Specifically, a screw bolt 76 is inserted into a brace-side mounting hole 64 formed in the brace-side mounting portion 62, and the brace-side mounting portion 62 is screwed to the brace 30. Further, a screw bolt 78 is inserted into the column side mounting hole 68 formed in the column side mounting portion 66 (see FIG. 3), and the column side mounting portion 66 is screwed to the column 10.

(Installation process)
Finally, a mounting process is performed. In the mounting step, first, the hole-down metal member 41 is fixed to the pillar 10. Thereby, the penetrating part 43 of the hole-down metal part 41 is arranged at a position directly above the second through-hole 36 formed in the brace 30 in the vertical direction (Z-axis direction).

  Next, the hole down bolt 44 is fixed. In fixing the hole down bolt 44, the hole down bolt 44 is connected to the through portion 43 of the hole down metal fitting 41, the second through hole 36 formed in the brace 30, and the first through hole 22 formed in the beam 20. , From the upper side in this order. Next, a washer 46 is inserted into a hole-down bolt 44 projecting downward from the first through hole 22, and a nut 48 </ b> A screwed into the thread of the hole-down bolt 44 from above the through portion 43, and a lower portion of the washer 46. A nut 48B screwed into the thread of the hole-down bolt 44 is tightened from the side. Thereby, the hole-down bolt 44 is fixed to the pillar 10 and the beam 20, and the existing building 1 to which the earthquake-resistant member 80 shown in FIG. 2 is attached is configured.

  As described above, in the earthquake-resistant member 80 of the present embodiment, the second through-hole 36 into which the hole-down bolt 44 is inserted is formed in the brace 30 attached to the connection portion 24 between the column 10 and the beam 20. I have. For this reason, in the earthquake-resistant member 80 of the present embodiment, the hole-down bolt 44 can be passed through the second through-hole 36, and the brace 30 in the front-rear direction (Y-axis direction), that is, in the width direction of the column 10 and the beam 20. And the hole down bolt 44 can be arranged at a position where they overlap. Therefore, if the dimensions W6 and W7 of the column 10 and the beam 20 are larger than the sum of the dimension W3 of the brace 30 and the dimension W1 of the reinforcing member 50, the brace 30 and the beam A hole down bolt 44 can be attached. Thereby, it can suppress that the pillar position of the pillar 10 and the beam position of the beam 20 in the existing building 1 change. Therefore, for example, the wall of the existing building 1 which was a true wall can be suppressed from becoming a large wall, and the appearance of the wall of the existing building 1 can be prevented from changing. Further, since it is not necessary to attach a backing plate to the column 10 and the beam 20, it is possible to reduce the labor and cost required for seismic reinforcement.

  When the second through holes 36 are formed in the brace 30, the strength of the brace 30 is lower than when the second through holes 36 are not formed. In the earthquake-resistant member 80 of the present embodiment, the reinforcing member 50 that covers the specific area 38 is attached to the rear side surface 34 of the brace 30, so that the strength of the brace 30 reduced by the formation of the second through hole 36 is reduced by the reinforcing member 50. Thus, the earthquake-resistant member 80 can have sufficient earthquake-resistant strength.

  The reinforcing member 50 includes a covering portion 52 covering the specific region 38, a first extending portion 54 extending rightward from the covering portion 52, and a second extending portion 55 located leftward from the covering portion 52. The portion 54 is fixed to the brace 30 by a screw bolt 72, and the second extending portion 55 is fixed to the brace 30 by a screw bolt 74. That is, the reinforcing member 50 is fixed to the brace 30 on both sides in the left-right direction (X-axis direction) of the specific region 38, so that the reinforcing member 50 reliably supplements the strength of the brace 30 in which the second through-hole 36 is formed. be able to.

  The reinforcing member 50 has a plate, that is, a flat plate shape, and the dimension W1 satisfies the relationship X. When the dimension W1 satisfies the relationship X, the strength of the reinforcing member 50 is equal to or more than the decrease in the strength of the brace 30 due to the formation of the second through hole 36 in the brace 30. As a result, the total strength obtained by combining the design reference strength of the brace 30 in which the second through-hole 36 is formed and the design reference strength of the reinforcing member 50 is calculated as the design reference strength of the brace 30 when the second through-hole 36 is not formed. The above can be considered.

  In the earthquake-resistant member 80 of the present embodiment, the brace 30 is fixed to the column 10 by the brace fixing member 60. The pillar-side attachment portion 66 of the brace fixing member 60 is disposed between the pillar 10 and the brace 30 when attached to the right side surface 12 of the pillar 10. Therefore, when calculating the maximum dimension W5 in the front-rear direction (Y-axis direction) of the earthquake-resistant member 80 including the brace 30, the reinforcing member 50, the brace fixing member 60, and the like, the brace fixing member is used together with the diameter of the hole-down bolt 44. It is not necessary to consider the dimension of the column-side mounting portion 66 in the front-rear direction. Accordingly, the dimensions W6 and W7 of the column 10 and the beam 20 are larger than the maximum dimension W5 of the earthquake-resistant member 80 which is the sum of the dimension W3 of the brace 30, the dimension W1 of the thickness of the reinforcing member 50, and the dimension W4 of the column-side mounting portion 66. Not only in the case, but also when the dimensions W6 and W7 of the column 10 and the beam 20 are substantially equal to the maximum dimension W5 of the seismic member 80, the plate 10 and the beam 20 The brace fixing member 60 can be fixed to the column 10 by using the column-side mounting portion 66 arranged in the column 10.

  In the earthquake-resistant member 80 of the present embodiment, the reinforcing member 50 and the brace-side attachment portion 62 of the brace fixing member 60 are attached to different side surfaces of the brace 30 in the front-rear direction (Y-axis direction). Therefore, the reinforcing member 50 and the brace-side attachment portion 62 can be arranged so that the brace 30 is sandwiched therebetween.

B. Modification:
The technology disclosed in the present specification is not limited to the above-described embodiment, and can be modified into various forms without departing from the gist thereof. For example, the following modifications are also possible.

  In the above embodiment, the wooden building is an existing building, but the wooden building may be a new building. Further, in the above embodiment, the earthquake-resistant member 80 is attached to a building to which the earthquake-resistant member 80 is not attached. However, the present invention is not limited to this. For example, a building to which the hole-down member 40 is already attached is attached. On the other hand, if the brace 30, the reinforcing member 50, and the brace fixing member 60 may be additionally installed, a hole down member 40 is additionally provided for the building where the brace 30 is already installed. The reinforcing member 50 and the brace fixing member 60 may be attached.

  In the above embodiment, the second through-hole 36 formed in the brace 30 does not interfere with the bottom surface 33 of the brace 30, but the second through-hole 36 may interfere with the bottom surface 33 of the brace 30.

  In the above embodiment, the first extending portion 54 of the reinforcing member 50 is fixed to the brace 30 by the screw bolt 72, and the second extending portion 55 of the reinforcing member 50 is fixed to the brace 30 by the screw bolt 74. Although it is described that 52 is fixed to the brace 30 while covering the specific region 38, the covering portion 52 may be directly fixed to the brace 30. That is, as long as the reinforcing member 50 includes the covering portion 52, the reinforcing member 50 does not necessarily need to include the first extending portion 54 and the second extending portion 55.

  In the above embodiment, the reinforcing member 50 is attached to the rear side surface 34 of the brace 30. However, the reinforcing member 50 may be attached to the front side surface 35 of the brace 30, or attached to both the rear side surface 34 and the front side surface 35 of the brace 30. You may be. Similarly, although the brace side attachment portion 62 of the brace fixing member 60 is attached to the front side surface 35 of the brace 30, the brace side attachment portion 62 may be attached to the rear side surface 34 of the brace 30. May be attached to both.

  In the above embodiment, the reinforcing member 50 and the brace-side attachment portion 62 of the brace fixing member 60 are attached to different side surfaces of the brace 30 in the front-rear direction (Y-axis direction). 62 may be attached to the same side of the brace 30 in the front-rear direction.

  In the above-described embodiment, the upper surface of the reinforcing member 50 has a shape along the upper surface of the brace 30, and the lower surface of the reinforcing member 50 has a shape along the lower surface of the brace 30. The present invention is not limited to this. For example, the reinforcing member 50 may protrude from the upper surface or the lower surface of the brace 30. In other words, as long as the reinforcing member 50 has the covering portion 52 that covers the specific region 38 of the rear side surface 34, the shape of the first extending portion 54 and the second extending portion 55 is not particularly limited, and the first mounting portion 55 The positions where the holes 56 and the second mounting holes 57 are formed are not limited.

  In the above embodiment, the dimension W1, which is the thickness of the reinforcing member 50, satisfies the relationship X, but is not limited thereto. Even if the reinforcing member 50 whose dimension W1 does not satisfy the relation X, the design standard strength of the brace 30 in which the second through-hole 36 is formed is compared with the case where the reinforcing member 50 is not attached at all by being attached. And the design strength of the reinforcing member 50 can be increased.

  In the above embodiment, the entirety of the column-side mounting portion 66 of the brace fixing member 60 is located between the column 10 and the brace 30. However, the present invention is not limited to this, and at least a part of the column-side mounting portion 66 is It suffices if it is located between 10 and brace 30.

  In the above embodiment, the brace fixing member 60 has the brace side attachment portion 62 and the column side attachment portion 66. However, the present invention is not limited to this, and the upper surface of the beam 20, that is, the side surface of the beam 20 on the brace 30 side is exemplified. A beam-side attachment portion to be attached may be further provided.

1: Existing Building 10: Column 12: Right Side 20: Beam 22: First Through Hole 24: Connection 30: Brace 33: Bottom 34: Rear Side 35: Front Side 36: Second Through Hole 38: Specific Area 40: Hole-down member 41: Hole-down hardware 44: Hole-down bolt 50: Reinforcement member 52: Covering portion 54: First extension portion 55: Second extension portion 56: First mounting hole 57: Second mounting hole 60: Brace Fixing member 62: Brace side attachment part 66: Column side attachment part 72-78: Screw bolt 80: Earthquake resistant member P: Strength ratio W1: Size W2: Hole diameter

Claims (8)

An earthquake-resistant member attached to a wooden building,
A second through hole, which is attached to a connection portion between a pillar and a beam of the wooden building and penetrates a first through hole vertically penetrating the beam, and into which a hole-down bolt fixed to the pillar is inserted. With the brace that formed
Attached to a side surface of the brace in a first direction orthogonal to the axial direction of the column and the axial direction of the beam, and covers a specific region in which the second through hole is projected in the first direction with respect to the side surface, A reinforcing member for reinforcing the strength of the brace reduced by the formation of the second through hole;
Equipped with a,
The reinforcing member,
A covering portion that covers the specific region,
A first extending portion extending from the covering portion to one side in the axial direction of the beam;
A second extending portion extending from the covering portion to the other side in the axial direction of the beam,
The earthquake-resistant member further comprises:
A first fixing member that is inserted into a first attachment hole formed in the first extension portion and fixes the reinforcing member to the brace;
A second fixing member that is inserted into a second mounting hole formed in the second extension portion and fixes the reinforcing member to the brace . An earthquake-resistant member attached to a wooden building,
A first through hole vertically penetrating a beam of the wooden building, and a second through hole formed in a brace attached to a connection between the pillar and the beam of the wooden building, A hole-down bolt inserted into the second through-hole formed at a position corresponding to the first through-hole and fixed to the column;
Attached to a side surface of the brace in a first direction orthogonal to the axial direction of the column and the axial direction of the beam, and covers a specific region in which the second through hole is projected in the first direction with respect to the side surface, A reinforcing member for reinforcing the strength of the brace reduced by the formation of the second through hole;
Equipped with a,
The reinforcing member,
A covering portion that covers the specific region,
A first extending portion extending from the covering portion to one side in the axial direction of the beam;
A second extending portion extending from the covering portion to the other side in the axial direction of the beam,
The earthquake-resistant member further comprises:
A first fixing member that is inserted into a first attachment hole formed in the first extension portion and fixes the reinforcing member to the brace;
A second fixing member that is inserted into a second mounting hole formed in the second extending portion and fixes the reinforcing member to the brace . The earthquake-resistant member according to claim 1 or 2, further comprising:
A brace fixing member for fixing the brace to the column,
An earthquake-resistant member, wherein the reinforcing member is provided as a member independent of the bracing fixing member. The earthquake-resistant member according to any one of claims 1 to 3 ,
The reinforcing member has a flat plate shape,
The dimension of the reinforcing member in the first direction is:
(Dimension of the reinforcing member in the first direction) ≧ (diameter of the second through hole in the first direction) / (ratio of design standard strength of the reinforcing member to design standard strength of the brace)
An earthquake-resistant member that satisfies the relationship. The earthquake-resistant member according to claim 3, wherein
The brace fixing member includes a brace-side attachment portion attached to a side surface of the brace in the first direction, a column-side attachment portion attached to the brace-side side surface of the column, the brace-side attachment portion, and the column side. Including a connecting portion connecting the mounting portion,
The pillar-side mounting portion includes an intermediate portion located between the pillar and the braces in the axial direction of the beam. The earthquake-resistant member according to claim 5 , wherein
The reinforcing member is attached to one side surface of the brace in the first direction,
The earthquake-resistant member, wherein the brace-side attachment portion is attached to the other side surface of the brace in the first direction. An installation method of an earthquake-resistant member for attaching an earthquake-resistant member to a wooden building,
A second through-hole is formed at a position corresponding to a first through-hole penetrating the beam in the up-down direction at a connection portion between the column and the beam of the wooden building, and an axial direction of the column and an axis of the beam are formed. The side surface in the first direction perpendicular to the direction covers the specific region where the second through hole is projected in the first direction with respect to the side surface, and reinforces the strength of the brace reduced by the formation of the second through hole. Installing the brace with a reinforcing member attached to it,
Inserting a hole-down bolt into the first through-hole and the second through-hole, and fixing the hole-down bolt to the column;
Equipped with a,
The reinforcing member,
A covering portion that covers the specific region,
A first extending portion extending from the covering portion to one side in the axial direction of the beam;
A second extending portion extending from the covering portion to the other side in the axial direction of the beam,
The earthquake-resistant member further comprises:
A first fixing member that is inserted into a first attachment hole formed in the first extension portion and fixes the reinforcing member to the brace;
A second fixing member that is inserted into a second mounting hole formed in the second extending portion and fixes the reinforcing member to the brace . An installation method of an earthquake-resistant member for attaching an earthquake-resistant member to a wooden building,
Forming a second through-hole at a position corresponding to a first through-hole penetrating the beam in a vertical direction, at a brace attached to a connection between a pillar and a beam of the wooden building;
A side surface in a first direction orthogonal to the axial direction of the pillar and the axial direction of the beam, covering a specific region where the second through hole is projected in the first direction with respect to the side surface; Attaching a reinforcing member for reinforcing the strength of the brace reduced by the formation of,
Inserting a hole-down bolt into the first through-hole and the second through-hole, and fixing the hole-down bolt to the column;
Equipped with a,
The reinforcing member,
A covering portion that covers the specific region,
A first extending portion extending from the covering portion to one side in the axial direction of the beam;
A second extending portion extending from the covering portion to the other side in the axial direction of the beam,
The earthquake-resistant member further comprises:
A first fixing member that is inserted into a first attachment hole formed in the first extension portion and fixes the reinforcing member to the brace;
A second fixing member that is inserted into a second mounting hole formed in the second extending portion and fixes the reinforcing member to the brace .

Images