JP2014148859A - Load bearing wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a load bearing wall capable of suppressing the decrease in vibration damping property.SOLUTION: A load bearing wall W comprises: a sill 11; a pair of end side vertical frames 12; a central side vertical frame 13; a head jamb 14; a pair of lower side support members 3 arranged at both left and right sides with the central side vertical frame 13 interposed between them, and with base end sides thereof fixed to both left and right sides of the sill 11; a pair of upper side support members 5 arranged at both left and right sides with the central side vertical frame 13 interposed between them, and with base end sides thereof fixed to both left and right sides of the head jamb 14; and a pair of viscoelastic dampers 7 arranged at both left and right sides with the central side vertical frame 13 interposed between them, and supported between the lower side support members 3 and the upper side support members 5, respectively. The central side vertical frame 13 has laterally penetrating first and second hole parts 13a, 13b. The pair of viscoelastic dampers 7 are connected together by a first tie 81 inserted through the first hole part 13a and a second tie 82 inserted through the second hole part 13b.

Description

  The present invention relates to a bearing wall having vibration damping properties.

  For example, Patent Document 1 discloses a technique for providing a viscoelastic damper inside a wall. FIG. 11 is a front view showing a conventional wall, and FIG. 12 is a cross-sectional view taken along line VI-VI in FIG.

  As shown in FIG. 11, the conventional wall 101 includes a rectangular frame 102, four braces 103 obliquely provided from the four corners of the frame 102 toward the center of the frame 102, and a frame from the left and right center of the frame 102. A pair of upper and lower intermediate pillars 104 extending toward the center of 102, an upper plate 105 to which tips of upper brace 103 and intermediate pillar 104 are fixed, and tips of lower brace 103 and intermediate pillar 104 are fixed. A lower plate 106, and a viscoelastic damper 107 provided between the upper plate 105 and the lower plate 106. The frame 102 includes a lower frame 102A, two vertical frames 102B provided upright on the lower frame 102A, and an upper frame 102C provided horizontally on the upper end of the vertical frame 102B.

  As shown in FIG. 12, the viscoelastic damper 107 includes an inner plate 107A fixed to the lower edge of the upper plate 105 with bolts 107D and extending downward, and a steel block 107E sandwiched between the upper and lower edges of the lower plate 106. It has a pair of outer plates 107B fixed by bolts 107F and extending upward, and a viscoelastic body 107C disposed between the front and back of the inner plate 107A and the outer plate 107B.

  With such a configuration, when the earthquake vibration is transmitted to the building and the frame 102 is distorted into a parallelogram, the viscoelastic body 107C shears and deforms in the left-right direction, so that the vibration energy acting on the frame 102 is converted into thermal energy. Can be converted and absorbed. Thereby, the deformation of the building can be reduced by reducing the shaking of the building.

JP 2007-126868 A

  However, in the invention of Patent Document 1, in order to arrange the viscoelastic damper 107, the intermediate pillar 104 is divided vertically. For this reason, the function of the intermediate column 104 as a column is lost, the interval between the vertical frames 102B (column interval) increases, and the wall 101 does not function as a support wall.

  In view of this, a structure in which inter-column or shear link type viscoelastic dampers are arranged on the left and right sides of the intermediate column 104 without dividing the intermediate column 104 can be considered.

  However, with such a structure, the space in which each viscoelastic damper is placed becomes narrow, so the viscoelastic damper becomes inevitably small, and the amount of vibration energy absorbed by the viscoelastic body is reduced and controlled. There was a problem that the vibration was reduced.

  The present invention has been developed from such a viewpoint, and an object of the present invention is to provide a bearing wall capable of suppressing a decrease in vibration damping performance.

  In order to solve the above-mentioned problems, the present invention provides a lower member, a pair of end side column members erected from both left and right ends of the lower member, and a central side column erected from the left and right central sides of the lower member. A member, an upper member horizontally disposed at the upper ends of the pair of end side column members and the central side column member, and arranged on both the left and right sides of the central side column member, A pair of lower support members having a proximal end fixed thereto, a pair of upper support members disposed on both left and right sides of the central column member, and having a proximal end fixed to both left and right ends of the upper member; A load bearing wall comprising a pair of viscoelastic dampers disposed on the left and right sides with a central column member interposed therebetween and supported between the lower support member and the upper support member, wherein the central side column member Has a viscoelastic damper hole penetrating in the left-right direction, and the pair of viscoelastic dampers Chromatography is characterized in that it is connected by the joint for viscoelastic damper material that is inserted into the hole portion for Viscoelastic Damper.

According to the present invention, the central column member has a viscoelastic damper hole that penetrates in the left-right direction, and the pair of viscoelastic dampers is a viscoelastic damper binder that is inserted into the viscoelastic damper hole. Therefore, the viscoelastic damper can be arranged in the wall without dividing the central side column member in the vertical direction, and the function as a load bearing wall can be secured.
According to the invention, the central column member has a viscoelastic damper hole penetrating in the left-right direction, and the pair of viscoelastic dampers is used for the viscoelastic damper inserted through the viscoelastic damper hole. Since they are connected by the connecting material, the viscoelastic damper can be disposed across the two spaces partitioned by the central column member. That is, since the two spaces partitioned by the central side column member can be used as the arrangement space of the viscoelastic damper, the viscoelastic damper can be enlarged without losing the support function of the wall, and the vibration energy of the viscoelastic body can be reduced. Decreasing vibration damping can be suppressed by increasing the amount of absorption.

  The central column member further includes a support member hole that penetrates in the left-right direction, and at least one of the pair of lower support members and the pair of upper support members is the support member hole. It is preferable to have a configuration in which the support members are connected to each other by a support member connecting member inserted through the support member.

  According to such a configuration, at least one of the pair of lower support members and the pair of upper support members is connected by the support member connecting member that is inserted into the support member hole of the central column member, The amount of deformation of at least one of the pair of lower support members and the pair of upper support members can be suppressed by the support member connecting member. Thereby, since the amount of shear deformation of the viscoelastic body is increased, the amount of vibration energy absorbed by the viscoelastic body can be increased to improve the vibration damping performance.

  The viscoelastic damper hole and the support member hole are formed to have a width dimension less than ¼ of the width dimension of the central column member (within a cross-sectional defect tolerance). It is preferable to do this.

  For example, the standard of the two-by-four method in Japan stipulates that reinforcement is made with hardware if the width of the hole provided in the column is more than 1/4 of the width of the column, If it is placed, it will become an obstacle when attaching the face material, and the workability will deteriorate. On the other hand, in this invention, since the width dimension of the hole part for viscoelastic dampers and the hole part for support members is formed in less than 1/4 of the width dimension of a center side column member, it is necessary to provide a hardware etc. This eliminates the possibility of improving workability when attaching the face material.

  ADVANTAGE OF THE INVENTION According to this invention, the bearing wall which can suppress a vibration damping fall can be provided.

It is a front view which shows the bearing wall which concerns on embodiment of this invention. It is sectional drawing along the II line | wire of FIG. It is sectional drawing along the II-II line of FIG. It is sectional drawing along the III-III line of FIG. It is sectional drawing along the IV-IV line of FIG. It is sectional drawing along the VV line of FIG. It is a front view which shows the construction procedure of the bearing wall which concerns on embodiment of this invention. It is a front view which shows the construction procedure of the bearing wall which concerns on embodiment of this invention. It is a front view which shows the other construction procedure of the load-bearing wall which concerns on embodiment of this invention. It is a front view which shows the bearing wall which concerns on the modification of this invention. It is a front view which shows the conventional wall. It is sectional drawing along the VI-VI line of FIG.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the description, the same elements are denoted by the same reference numerals, and redundant description is omitted. In this embodiment, the case where the bearing wall of the present invention is applied to a two-story building constructed by a wooden frame wall construction method will be described as an example. In the description, up, down, left, and right are based on the arrow direction shown in FIG.

  As shown in FIG. 1, the bearing wall W includes a frame 1, four hole-down hardware 2, a pair of lower support members 3, a pair of lower connection plates 4, and a pair of upper support members 5, A pair of upper connection plates 6, a pair of viscoelastic dampers 7, and first to fourth connecting members 81 to 84 are provided.

<Framework>
As shown in FIG. 1, the frame 1 has a shape having two rectangular spaces divided into left and right, and a lower frame 11 and a pair of end-side verticals erected on both left and right ends of the lower frame 11. It has a frame 12, a center-side vertical frame 13 erected at the center of the left and right sides of the lower frame 11, and an upper frame 14 that is horizontally provided at the upper ends of the end-side vertical frame 12 and the center-side vertical frame 13. In addition, although illustration is abbreviate | omitted, the face material comprised by the structural plywood etc. is attached to the outdoor side of the frame 1 with fixing means, such as a nail and a screw.

  The lower frame 11 as a lower member is a wooden member extending in the left-right direction (horizontal direction). For example, 204 material (38 mm × 89 mm) is used for the lower frame 11 of the present embodiment. A pair of base plates 90 are fixed to the left and right sides of the upper end of the lower frame 11 by fixing means such as screws, respectively. The base plate 90 is a plate-like metal member, and has a notch (not shown) through which the anchor bolt 21 is inserted. A floor structural plywood 93 and a floor joist 92 are installed at the lower end of the lower frame 11 in this order. For example, 210 material (38 mm × 235 mm) or LVL (38 mm × 302 mm) is used for the floor joist 92 of the present embodiment.

  The end-side vertical frame 12 that is an end-side column member is a wooden member that extends in the up-down direction (vertical direction). For example, 204 material is used for the end side vertical frame 12 of the present embodiment.

  The center side vertical frame 13 which is a center side column member is a wooden member extended in the up-down direction, and is arrange | positioned at equal intervals with respect to the right-and-left end side vertical frame 12. This interval is set to 455 mm, which is a general column interval of the frame wall construction method, but may be changed as appropriate. For example, 204 material is used for the center side vertical frame 13 of the present embodiment.

  As shown in FIG. 2, first to fourth holes 13 a to 13 d for inserting the first to fourth connecting members 81 to 84 are formed in the center-side vertical frame 13 so as to penetrate in the left-right direction. Yes. Two first hole portions 13a are formed at a predetermined interval in a direction orthogonal to the left-right direction (wall thickness direction), and the other second to fourth hole portions 13b to 13d are single holes. It is formed with. The width dimensions D1 to D4 of the first to fourth holes 13a to 13d (D1 × 2 for the first hole 13a) are equal to or less than 1/4 of the width dimension D5 of the central vertical frame 13 (allowance for cross-sectional defects). (Within range). The first hole 13a and the second hole 13b constitute a viscoelastic damper hole as defined in the claims, and the third hole 13c and the fourth hole 13d are support members as defined in the claims. It constitutes a hole for use. The first to fourth hole portions 13a to 13d are formed, for example, by drilling the center side vertical frame 13 with an electric drill and then performing edge processing with an electric trimmer.

  As shown in FIG. 1, the upper frame 14 which is an upper member is a wooden member extended in the left-right direction. 204 material is used for the upper frame 14 of this embodiment, for example. A pair of base plates 90 are fixed to the left and right sides of the upper end of the upper frame 14 by fixing means such as screws, respectively. The base plate 90 is a plate-like metal member, and has a notch (not shown) through which the anchor bolt 21 is inserted. At the upper end of the upper frame 14, a head joint 91 and a floor joist 92 are installed in this order. The head joint 91 of the present embodiment uses, for example, 204 materials, and the floor joist 92 uses, for example, 210 materials or LVL.

<Halldown hardware>
As shown in FIG. 1, the hole-down hardware 2 is installed on the stigma and pedestal of the end-side vertical frame 12, and the end-side vertical frame 12 and the floor joist 92 are tightened to tighten the end-side vertical frame 12. Has a function to prevent lifting. The hole-down hardware 2 also has a function of fixing the base plate 90 to a structural material (for example, floor joist 92) disposed on the upper side of the upper frame 14 or the lower side of the lower frame 11. The anchor bolt 21 of the hole-down hardware 2 on the stigma side is inserted through the notch portion of the base plate 90 and penetrates the upper frame 14, the head joint 91, the floor joist 92 and the like. The anchor bolt 21 of the hole-down hardware 2 on the column base side is inserted into the cutout portion of the base plate 90 and penetrates the lower frame 11, the floor structural plywood 93, the floor joist 92 and the like. The base plate 90 is fixed to the floor joist 92 or the like by installing the washer 22 and screwing the nut 23 in a state where the anchor bolt 21 is inserted into the notch. When the base plate 90 is fixed to the floor joist 92 or the like using a drill screw, the base plate 90 may not be fixed to the floor joist 92 or the like using the hole down hardware 2.

<Lower support member>
As shown in FIG. 1, the lower support member 3 is a rectangular cylindrical metal member that supports the viscoelastic damper 7 from below via the lower connection plate 4. The lower support members 3 are arranged on both the left and right sides of the center-side vertical frame 13 and face each other in a C shape. In other words, the lower support members 3 are arranged so as to approach each other from the bottom to the top. The lower end (base end) of the lower support member 3 is fixed to the upper surface of the base plate 90 by welding. As shown in FIG. 3, a slit 31 for inserting the lower connection plate 4 is formed along the longitudinal direction of the lower support member 3 at the upper end (tip) of the lower support member 3. As shown in FIG. 6, a coupling member 32 that is coupled to the third connecting member 83 is provided on the upper end side of the lower support member 3. The coupling member 32 is a plate-like member that extends from the side surface of the one lower support member 3 on the central vertical frame 13 side toward the other lower support member 3. The base end of the coupling member 32 is fixed to the lower support member 3 by welding.

<Lower connection plate>
As shown in FIG. 1, the lower connection plate 4 is a rectangular and plate-shaped metal member that connects the lower support member 3 and the viscoelastic damper 7. The lower connection plates 4 are arranged on both the left and right sides of the center side vertical frame 13, respectively. As shown in FIG. 3, the lower connection plate 4 is fixed to the lower support member 3 by welding in a state where the lower edge is inserted into the slit 31 of the lower support member 3.

<Upper support member>
As shown in FIG. 1, the upper support member 5 is a rectangular tubular metal member that supports the viscoelastic damper 7 from above via the upper connection plate 6. The upper support members 5 are disposed on both the left and right sides of the central vertical frame 13 and are opposed to each other in an inverted C shape. In other words, the upper support members 5 are arranged so as to approach each other from the top to the bottom. The upper end (base end) of the upper support member 5 is fixed to the lower surface of the base plate 90 by welding. As shown in FIG. 3, a slit 51 for inserting the upper connection plate 6 is formed along the longitudinal direction of the upper support member 5 at the lower end (front end) of the upper support member 5. As shown in FIG. 1, a coupling member 52 coupled to the fourth connecting member 84 is provided on the lower end side of the upper support member 5. The coupling member 52 is a plate-like member that extends from the side surface of the one upper support member 5 on the central vertical frame 13 side toward the other upper support member 5. The base end of the coupling member 52 is fixed to the upper support member 5 by welding.

<Upper connection plate>
As shown in FIG. 1, the upper connection plate 6 is a rectangular and plate-shaped metal member that connects the upper support member 5 and the viscoelastic damper 7. The upper connection plate 6 is disposed on both the left and right sides of the central vertical frame 13. As shown in FIG. 3, the upper connection plate 6 is fixed to the upper support member 5 by welding in a state where the upper edge is inserted into the slit 51 of the upper support member 5.

<Viscoelastic damper>
The viscoelastic damper 7 is a columnar damper that absorbs vibration energy acting on the frame 1 due to an earthquake or the like by shear deformation in the left-right direction of the viscoelastic body 73. As shown in FIG. 1, the viscoelastic dampers 7 are arranged on both the left and right sides of the central vertical frame 13. As shown in FIG. 3, each viscoelastic damper 7 includes an inner plate 71, a pair of outer plates 72, and a pair of viscoelastic bodies 73 that are firmly surface-bonded.

  As shown in FIG. 3, the inner plate 71 is a rectangular and plate-like metal member fixed to the lower edge of the upper connection plate 6 with a bolt B and a nut N. The inner plate 71 extends below the upper connection plate 6. In the present embodiment, the nut N is a double nut for preventing loosening.

  The outer plate 72 is a rectangular and plate-like metal member fixed to the upper edge of the lower connection plate 4 with bolts B and nuts N. The outer plate 72 is fixed with bolts B and nuts N on both sides of the upper edge of the lower connection plate 4 with a filler plate 94 interposed therebetween. Each outer plate 72 extends upward from the lower connection plate 4 and faces the inner plate 71 at an equal interval.

  The viscoelastic body 73 is a member that absorbs vibration energy acting on the frame 1 by converting it into heat energy by the frame 1 being shear-deformed in the left-right direction in FIG. One viscoelastic body 73 is disposed between the front and back of the inner plate 71 and the outer plate 72 (two in total), and is fixed to both the inner plate 71 and the outer plate 72 by fixing means such as an adhesive or an adhesive. Has been. In the present embodiment, two viscoelastic bodies 73 are arranged on each of the left and right sides of the central vertical frame 13 (four in total). The viscoelastic damper 7 may be installed upside down, the inner plate 71 may be fixed to the lower connection plate 4, and the outer plate 72 may be fixed to the upper connection plate 6. Moreover, when the hole width of the 1st-4th hole parts 13a-13d provided in the center side vertical frame 13 has allowances etc., the thickness of the viscoelastic body 73 can be enlarged and high viscoelasticity can also be obtained.

<First tie material>
As shown in FIG. 1, the first connecting member 81 is a long plate-like metal member that connects the lower ends of the pair of viscoelastic dampers 7. The 1st connection material 81 comprises the connection material for viscoelastic dampers called in a claim, and is penetrated by the 1st hole 13a. The height dimension of the 1st hole 13a is formed larger than the height dimension of the 1st joining material 81, as shown in FIG. As shown in FIG. 4, the first connecting member 81 is composed of a set of two sheets. In the present embodiment, the left and right ends of the lower connecting plate 4, the two filler plates 94, and the two outer plates 72 are sandwiched between the left and right ends of the two first connecting members 81. These seven members are integrally coupled by bolts B and nuts N. Further, the center and the other end side of the lower connection plate 4, filler plate 94, and outer plate 72 in the left-right direction are integrally coupled by bolts B and nuts N.

<Second connecting material>
As shown in FIG. 1, the second connecting member 82 is provided above the first connecting member 81 at a predetermined interval and is made of a long plate-like metal that connects the upper ends of the pair of viscoelastic dampers 7. It is a member. The 2nd connecting material 82 comprises the connecting material for viscoelastic dampers referred to in the claims, and is inserted through the second hole 13b. The height dimension of the second hole 13b is formed larger than the height dimension of the second connecting member 82 as shown in FIG. As shown in FIG. 5, the second connecting material 82 is composed of a set of two sheets. In the present embodiment, the left and right ends of the upper connection plate 6 and the inner plate 71 are sandwiched between the left and right ends of the two second connecting members 82, respectively. The nuts N are integrally connected. Further, the center in the left-right direction and the other end side of the upper connection plate 6 and the inner plate 71 are integrally coupled by bolts B and nuts N.

<3rd connecting material, 4th connecting material>
As shown in FIG. 1, the third connecting member 83 is a long plate-like metal member that couples the pair of lower support members 3 through the coupling member 32. The third connecting member 83 constitutes a supporting member connecting member in the scope of the claims, and has a function of suppressing the deformation amount of the lower supporting member 3. As shown in FIG. 6, the third connecting member 83 is composed of two sheets. In the present embodiment, the distal end side of the coupling member 32 is sandwiched and sandwiched between the left and right end sides of the two third connecting members 83, and these three members are integrally coupled by bolts B and nuts N. ing. Further, in the present embodiment, the filler plate 95 is sandwiched and sandwiched between the left and right center sides of the two third connecting members 83, and these three members are integrally coupled by bolts B and nuts N. ing. The third connecting member 83 and the filler plate 95 are inserted through the third hole 13c, respectively. A predetermined clearance is provided between the center side vertical frame 13 and the bolts B and nuts N closest to the center side vertical frame 13. Thereby, when the lower side support member 3 shakes right and left by an earthquake etc., the contact with the center side vertical frame 13, and the volt | bolt B and the nut N can be avoided.

  In addition, the 4th connecting material 84 which is a connecting material for support members is the same as that of the 3rd connecting material 83 except the point which connects a pair of upper side support members 5 and suppresses the deformation amount of the upper side support member 5. Therefore, the description is omitted. Incidentally, for example, as long as the cross-sectional area of the lower support member 3 and the upper support member 5 can be increased to ensure the strength that prevents deformation (buckling), the third connecting member 83 and the fourth connecting member 84 may be omitted. .

  The load-bearing wall W according to the embodiment of the present invention is basically configured as described above. Next, the construction procedure of the load-bearing wall W will be described with reference mainly to FIGS. 7 and 8. . 7 and 8 are front views showing a construction procedure of the bearing wall W according to the embodiment of the present invention.

  As shown in FIG. 7A, a pair of dampers in which the lower support member 3, the lower connection plate 4, the viscoelastic damper 7, the upper connection plate 6, the upper support member 5, and the base plate 90 are assembled together. Units U1 and U2 (hereinafter also referred to as “left damper unit U1” and “right damper unit U2”) are manufactured at the factory. At this time, the bolt fastening portions b1 to b4 and b7 to b10 at the four outer sides of the damper units U1 and U2 are temporarily tightened, respectively.

  In addition to the damper units U1 and U2, a pair of first connecting members 81 and 81, a pair of second connecting members 82 and 82, a pair of third connecting members 83 and 83, and a pair of fourth connecting members 84. , 84 etc. are produced at the factory. Then, the damper units U1, U2, etc. are transported to the construction site.

  Subsequently, as shown in FIG. 7B, the frame 1 and the like are installed at the construction site, and the left damper unit U <b> 1 is installed in the left space of the central vertical frame 13. At this time, the temporarily tightened bolt fastening portions b1 to b4 are respectively tightened to prevent the positional displacement of the lower connection plate 4 and the like. Further, the lower base plate 90 is fixed to the lower frame 11 with at least one screw, so that the left damper unit U1 is self-supporting.

  Subsequently, one of the pair of first connecting members 81, 81 (the one located on the front side) is inserted into the first hole 13 a of the central vertical frame 13 and the pair of second connecting members 82, 82. One (the one located on the front side) is inserted into the second hole 13b of the central vertical frame 13. And the left end side of the 1st connecting material 81 is temporarily fastened to the bolt fastening part b5 of one place inside the left damper unit U1 (namely, one place closest to the center side vertical frame 13). Further, the left end side of the second connecting member 82 is temporarily fastened to the bolt fastening portion b6 at one place inside the left damper unit U1.

  Subsequently, the pair of third connecting members 83, 83 are inserted through the third hole 13 c of the central vertical frame 13, respectively, and the pair of fourth connecting members 84, 84 are connected to the fourth hole of the central vertical frame 13. 13d is inserted through each. Then, the left end side of the third connecting member 83 is fixed to the coupling member 32 of the left damper unit U1. Further, the left end side of the fourth connecting member 84 is fixed to the coupling member 52 of the left damper unit U1.

  Subsequently, as shown in FIG. 8A, the right damper unit U <b> 2 is installed in the right space of the central vertical frame 13. At this time, the temporarily tightened bolt fastening portions b7 to b10 are each finally tightened to prevent positional displacement of the lower connection plate 4 and the like. Further, the lower base plate 90 is fixed to the lower frame 11 with at least one screw, and the right damper unit U2 is self-supported (see FIGS. 7A and 7B).

  Subsequently, the right end side of the first connecting member 81 is temporarily fastened to the bolt fastening portion b11 at one place inside the right damper unit U2. Moreover, the right end side of the 2nd connecting material 82 is temporarily fastened to the bolt fastening part b12 of one place inside the right damper unit U2.

  Subsequently, the right end side of the third connecting member 83 is fixed to the coupling member 32 of the right damper unit U2. Further, the right end side of the fourth connecting member 84 is fixed to the coupling member 52 of the right damper unit U2.

  Subsequently, as shown in FIG. 8 (b), the other (the one located on the back side) of the pair of first connecting members 81, 81 is inserted into the first hole 13 a of the central vertical frame 13, and the pair The other of the second connecting members 82, 82 (the one located on the back side) is inserted into the second hole 13 b of the central vertical frame 13. At this time, in order to avoid interference with the bolt B that has been tightened, the first connecting member 81 and the second connecting member 82 on the back side are inserted while being inclined in the vertical direction with respect to the horizontal plane. In the present embodiment, the height dimension of the first hole 13a is formed larger than the height dimension of the first connecting member 81, and the height dimension of the second hole 13b is the height of the second connecting member 82. Since it is formed larger than the dimension, the inclined first connecting member 81 and second connecting member 82 can be inserted through the first hole 13a and the second hole 13b, respectively. And if it penetrates to the position which does not overlap with the bolt B tightened up and down, the 1st connecting material 81 and the 2nd connecting material 82 will be rotated so that it may become horizontal.

  Subsequently, the left and right ends of the pair of first connecting members 81, 81 are finally tightened to the bolt fastening portions b5, b11 of the damper units U1, U2, respectively. Further, the left and right ends of the pair of second connecting members 82 and 82 are finally fastened to the bolt fastening portions b6 and b12 of the damper units U1 and U2, respectively. The load-bearing wall W is constructed through the above construction procedure. According to this construction procedure, the number of parts assembled on site can be reduced. Incidentally, the relative positions of the damper units U <b> 1 and U <b> 2 with respect to the central vertical frame 13 can be adjusted by increasing or decreasing the lengths of the first connecting material 81 and the second connecting material 82.

  Next, the construction procedure of the bearing wall W will be described with reference mainly to FIG. FIG. 9 is a front view showing another construction procedure of the load-bearing wall according to the embodiment of the present invention.

  As shown in FIG. 9A, the frame 1 and the like are installed in advance, the base plates 90 are installed on both the left and right sides of the upper end of the lower frame 11, and the third hole 13 c of the central vertical frame 13 is third. The connecting material 83 is inserted. Subsequently, the lower end of the lower support member 3 is fixed to the base plate 90 by welding, and the upper end side of the lower support member 3 is fixed to the third connecting member 83. Specifically, as shown in FIG. 6, the two third connecting members 83 and the connecting member 32 fixed to the lower support member 3 are integrally connected by bolts B and nuts N. Furthermore, as shown in FIG. 3, the lower edge of the lower connection plate 4 is inserted into the slit 31 of the lower support member 3, and the lower support member 3 and the lower connection plate 4 are fixed by welding. After the base plate 90 is installed, the hole-down hardware 2 is installed on the column base of the end-side vertical frame 12.

  Subsequently, as shown in FIG. 9B, the base plate 90 is installed on both the left and right sides of the lower end of the upper frame 14, and the fourth connecting member 84 is inserted into the fourth hole 13 d of the central vertical frame 13. Subsequently, the upper end of the upper support member 5 is fixed to the base plate 90 by welding, and the lower end side of the upper support member 5 is fixed to the fourth connecting member 84. Furthermore, as shown in FIG. 3, the upper edge of the upper connection plate 6 is inserted into the slit 51 of the upper support member 5, and the upper support member 5 and the upper connection plate 6 are fixed by welding. After the base plate 90 is installed, the hole-down hardware 2 is installed at the stigma of the end-side vertical frame 12.

  Subsequently, as shown in FIG. 9 (c), after the first connecting member 81 is inserted into the first hole 13 a of the central vertical frame 13, the lower end side of the viscoelastic damper 7 is fixed to the first connecting member 81. To do. Specifically, as shown in FIG. 4, the two first connecting members 81, the two outer plates 72, the two filler plates 94, and the lower connection plate 4 are integrated with bolts B and nuts N. Join.

  Subsequently, as shown in FIG. 9 (d), after the second connecting member 82 is inserted into the second hole 13 b of the central vertical frame 13, the upper end side of the viscoelastic damper 7 is fixed to the second connecting member 82. To do. Specifically, as shown in FIG. 5, the two second connecting members 82, the inner plate 71, and the upper connection plate 6 are integrally coupled with bolts B and nuts N. The load-bearing wall W is constructed through the above construction procedure.

  According to this embodiment described above, as shown in FIG. 1, the center-side vertical frame 13 has the first hole portion 13 a and the second hole portion 13 b that penetrate in the left-right direction, and the pair of viscoelastic dampers 7. Are connected by the first connecting member 81 inserted through the first hole 13a and the second connecting member 82 inserted through the second hole 13b, so that the central vertical frame 13 is not divided vertically. The viscoelastic damper 7 can be disposed in the wall (in the frame 1), and the function as the bearing wall W can be secured.

  According to this embodiment, as shown in FIG. 1, the central vertical frame 13 has a first hole portion 13 a and a second hole portion 13 b that penetrate in the left-right direction, and the pair of viscoelastic dampers 7 includes Since it is connected by the first connecting member 81 inserted through the first hole 13a and the second connecting member 82 inserted through the second hole 13b, it straddles the two spaces partitioned by the central vertical frame 13. A viscoelastic damper 7 can be arranged. That is, since the two spaces partitioned by the central vertical frame 13 can be used as an arrangement space for the viscoelastic damper 7, the viscoelastic damper 7 can be enlarged without losing the support function of the wall, and the viscoelastic body 73 can be enlarged. The amount of vibration energy absorbed by can be increased to suppress the vibration damping.

  According to the present embodiment, as shown in FIG. 1, the pair of lower support members 3 are connected by the third connecting member 83 that is inserted through the third hole 13 c of the central vertical frame 13. The deformation amount of the pair of lower support members 3 can be suppressed by the third connecting member 83. Further, the pair of upper support members 5 are connected to each other by the fourth connecting member 84 that is inserted through the fourth hole 13 d of the central vertical frame 13, and thus the pair of upper support members 5 are connected by the fourth connecting member 84. The amount of deformation can be suppressed. As a result, the amount of shear deformation of the viscoelastic body 73 is increased, so that the amount of vibration energy absorbed by the viscoelastic body 73 can be increased to improve the damping performance.

  According to this embodiment, as shown in FIG. 2, the width dimensions D1 to D4 of the first to fourth holes 13a to 13d are less than ¼ of the width dimension D5 of the central vertical frame 13 (cross-sectional defect). Therefore, it is not necessary to provide hardware or the like, and the workability when attaching the face material can be improved.

  According to the present embodiment, as shown in FIG. 1, the first hole 13a and the second hole 13b are opened in the central vertical frame 13, and the first connecting member 81 is inserted into the first hole 13a. The second connecting member 82 is inserted into the second hole 13b, and the bearing wall W having vibration damping properties is constructed simply by connecting the pair of viscoelastic dampers 7 with the first connecting member 81 and the second connecting member 82. Therefore, it is not necessary to significantly change the existing building structure (for example, column spacing) at the time of renovation. In particular, the Japanese standard for the frame wall construction method stipulates that the column spacing should be 500 mm or less, and in buildings constructed by the frame wall construction method, the column spacing is generally set at 455 mm. However, according to the present embodiment, since it is not necessary to change such a column interval, it is possible to reduce the labor and cost required for the renovation, and the performance of the building constructed by the frame wall construction method (structural performance and vertical frame) It is possible to impart vibration damping while taking advantage of the performance between the two.

  The preferred embodiment of the present invention has been described above with reference to the drawings. However, the present invention is not limited to this embodiment, and can be changed as appropriate without departing from the gist of the present invention.

  In this embodiment, the load-bearing wall W of the present invention is applied to the case of a two-story building constructed by a wooden frame wall construction method, but the present invention is not limited to this, for example, a wooden frame The present invention may be applied to a building constructed by a construction method or a steel structure, and the number of floors of the building is not particularly limited.

  In the present embodiment, the width dimensions D1 to D4 of the first to fourth hole portions 13a to 13d are formed to be less than ¼ of the width dimension D5 of the central vertical frame 13, but the present invention is limited to this. Instead, the width dimensions D1 to D4 of the first to fourth holes 13a to 13d are formed to be 1/4 or more of the width dimension D5 of the central vertical frame 13, and reinforcing members such as hardware are provided. May be.

  In the present embodiment, the lower support members 3 and the upper support members 5 are both connected by the third connecting member 83 and the fourth connecting member 84, but the present invention is not limited to this, and the lower side Only the support members 3 may be connected by the third connecting member 83, and the upper support members 5 may not be connected by the fourth connecting member 84, or only the upper support members 5 may be connected by the fourth connecting member 84. However, the lower support members 3 may not be connected by the third connecting member 83.

  In the present embodiment, the hole-down hardware 2 is used, but the present invention is not limited to this, and a tie rod 96 may be used instead of the hole-down hardware 2 as shown in FIG. FIG. 10 is a front view showing a load-bearing wall W according to a modification of the present invention.

  The load-bearing wall W of this modification is applied to, for example, a medium-rise building (for example, a four-story building) that is constructed by a framed wall construction method. The tie rod 96 has a function of fixing the base plate 90 to a structural material (for example, floor joist 92) disposed on the upper side of the upper frame 14 in addition to the function of preventing the end side vertical frame 12 from being lifted. . The tie rod 96 is inserted into the cutout portion of the upper base plate 90 and penetrates the upper frame 14, the head joint 91, the floor joist 92 and the like. The upper base plate 90 is fixed to the floor joist 92 or the like by installing a washer 98 and screwing a nut 99 in a state where the tie rod 96 is inserted into the notch.

  The tie rod 96 is divided into a plurality of upper and lower parts, and the tie rods 96 are connected to each other via a coupler 97. The lowermost tie rod 96 is connected to the anchor bolt 21 via a coupler 97.

  The anchor bolt 21 has a function of fixing the base plate 90 to a structural material (for example, floor joist 92) disposed below the lower frame 11. The anchor bolt 21 is inserted into the cutout portion of the base plate 90 and penetrates the lower frame 11, the floor structural plywood 93, the floor joists 92 and the like. The base plate 90 is fixed to the floor joist 92 or the like by installing a washer 98 and screwing a nut 99 in a state where the anchor bolt 21 is inserted into the notch.

W Bearing Wall 1 Frame 11 Lower Frame 12 End Side Vertical Frame 13 Center Side Vertical Frame 13a First Hole (Viscoelastic Damper Hole)
13b Second hole (hole for viscoelastic damper)
13c 3rd hole (hole for support member)
13d 4th hole (hole for support member)
14 upper frame 3 lower support member 4 lower connection plate 5 upper support member 6 upper connection plate 7 viscoelastic damper 73 viscoelastic body 81 first tie material (tie material for viscoelastic damper)
82 Second tie material (tie material for viscoelastic damper)
83 Third tie material (tie material for support member)
84 Fourth tie material (tie material for support member)
D1-D5 width dimension

Claims (3)

A lower member;
A pair of end side column members erected from the left and right ends of the lower member;
A central column member erected from the left and right central side of the lower member;
An upper member laterally provided at the upper ends of the pair of end side column members and the central side column member;
A pair of lower support members disposed on both left and right sides with the central side column member interposed therebetween, with proximal ends fixed to the left and right ends of the lower member;
A pair of upper support members disposed on both the left and right sides with the central side column member interposed therebetween, the base end sides being fixed to the left and right ends of the upper member;
A load bearing wall provided with a pair of viscoelastic dampers disposed on the left and right sides across the central column member and supported between the lower support member and the upper support member,
The central side column member has a hole for a viscoelastic damper penetrating in the left-right direction,
The load bearing wall, wherein the pair of viscoelastic dampers are connected by a viscoelastic damper connecting member inserted through the hole for the viscoelastic damper. The central side column member further has a support member hole that penetrates in the left-right direction,
2. The at least one of the pair of lower support members and the pair of upper support members is connected by a support member connecting member inserted through the support member hole. Bearing wall.   3. The bearing wall according to claim 2, wherein a width dimension of the hole part for the viscoelastic damper and a hole part for the support member is formed to be less than ¼ of a width dimension of the central side column member. .

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