JP2020143502A - Bearing wall - Google Patents

Bearing wall Download PDF

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JP2020143502A
JP2020143502A JP2019040978A JP2019040978A JP2020143502A JP 2020143502 A JP2020143502 A JP 2020143502A JP 2019040978 A JP2019040978 A JP 2019040978A JP 2019040978 A JP2019040978 A JP 2019040978A JP 2020143502 A JP2020143502 A JP 2020143502A
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diagonal
stiffener
bearing
frame
members
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加藤 圭
Kei Kato
圭 加藤
弘之 成原
Hiroyuki Narihara
弘之 成原
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大成建設株式会社
Taisei Corp
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Abstract

To provide a bearing wall which can be comparatively easily formed, and can reduce labor and cost at the time of construction.SOLUTION: A bearing wall 1 includes a lattice 3 in which a plurality of openings 33 are formed of a first diagonal material 31 and a second diagonal material 32 crossing each other, a frame material 4 surrounding the periphery of the lattice 3, and a stiffener 5 arranged on at least a part of the plurality of openings 33. The first diagonal material 31 and the second diagonal material 32 are formed of plate-like steel materials. The stiffener 5 is a wooden member that is brought into surface contact with the first diagonal material 31 or second diagonal material 32.SELECTED DRAWING: Figure 1

Description

本発明は、耐力壁に関する。 The present invention relates to a bearing wall.
耐力壁は、建物の所定の位置に配設されることで、建物に作用する水平力に抵抗し、当該建物の耐震性の向上に寄与する。このような耐力壁としては、梁柱架構内を遮蔽するように形成された鉄筋コンクリート製の壁がある。鉄筋コンクリート壁は、梁柱架構の内側空間を遮蔽してしまうため、意匠的な設計の自由度や採光が制限されてしまう。そのため、特許文献1には、斜材を組み合わせることにより複数の開口部を形成する格子と、格子の開口部に配設されたガラス板からなる座屈補剛材とを備える耐震壁が開示されている。特許文献1の耐震壁は、座屈補剛材としてガラス板を使用しているため、採光しやすくなるものの、ガラス板を固定するためのサッシ、ビス、目地材等が必要となり、部材点数が多い。また、特許文献1の耐震壁では、全ての開口に対して座屈補剛材を設ける必要がある。そのため、施工に手間がかかってしまう。特許文献1の耐力壁では、座屈補剛材と斜材との間に隙間を有した状態で座屈補剛材を点で支持しているため、斜材に座屈が生じた際に座屈補剛材に当接するまで荷重が低下してしまい、不安定な状態となる(図8参照)。さらに、ガラスは脆性材料で衝撃にも弱いため、急激な耐力低下を防ぐためには、安全率を大きく取る必要がある。 By arranging the bearing wall at a predetermined position of the building, the bearing wall resists the horizontal force acting on the building and contributes to the improvement of the earthquake resistance of the building. As such a bearing wall, there is a wall made of reinforced concrete formed so as to shield the inside of the beam column frame. Since the reinforced concrete wall shields the space inside the beam column frame, the degree of freedom in design design and daylighting are limited. Therefore, Patent Document 1 discloses a seismic wall provided with a lattice for forming a plurality of openings by combining diagonal members and a buckling stiffener made of a glass plate arranged at the openings of the lattice. ing. Since the earthquake-resistant wall of Patent Document 1 uses a glass plate as a buckling stiffener, it is easy to collect light, but sashes, screws, joint materials, etc. for fixing the glass plate are required, and the number of members is increased. There are many. Further, in the earthquake-resistant wall of Patent Document 1, it is necessary to provide a buckling stiffener for all openings. Therefore, it takes time and effort for construction. In the bearing wall of Patent Document 1, since the buckling stiffener is supported by points with a gap between the buckling stiffener and the slanted member, when the buckling stiffener occurs in buckling. The load drops until it comes into contact with the buckling stiffener, resulting in an unstable state (see FIG. 8). Furthermore, since glass is a brittle material and is vulnerable to impact, it is necessary to take a large safety factor in order to prevent a sudden decrease in proof stress.
特開2012−041700号公報Japanese Unexamined Patent Publication No. 2012-041700
本発明は、比較的簡易に形成することができ、施工時の手間と費用を削減することを可能とした耐力壁を提案することを課題とする。 An object of the present invention is to propose a bearing wall that can be formed relatively easily and that can reduce labor and cost during construction.
前記課題を解決するために、本発明の耐力壁は、交差する斜材によって複数の開口部が形成された格子と、前記格子の周囲を囲う枠材とを備えている。前記斜材は板状の鋼材からなり、複数の前記開口部の少なくとも一部には前記斜材と面接触する木製の補剛材が配設されている。かかる耐力壁によれば、補剛材として木製部材を使用しているため、ビスやボルトなどの簡易な固定具で斜材に補剛材を固定できる。また、木製部材を補剛材とすれば、サッシ等を省略できるため、部材点数が少なくて済む。そのため、施工時の手間や材料費の低減化を図ることができる。また、構成部材として木材を使用すれば、二酸化炭素(CO)排出量の削減効果を期待することもできる。また、座屈補剛材が斜材と面接触し、斜材を面で支持しているため、斜材の荷重増加が安定している。さらに、木材はガラスの1/3程度の比重でありながら、圧縮応力や曲げ応力に対して延性がある材料であるため、脆性的に破壊することがなく、耐力壁に靭性をもたらすことができる。 In order to solve the above-mentioned problems, the bearing wall of the present invention includes a lattice in which a plurality of openings are formed by intersecting diagonal members, and a frame member surrounding the lattice. The diagonal member is made of a plate-shaped steel material, and at least a part of the plurality of openings is provided with a wooden stiffener that comes into surface contact with the diagonal member. According to such a bearing wall, since a wooden member is used as the stiffener, the stiffener can be fixed to the diagonal member with a simple fixture such as a screw or a bolt. Further, if the wooden member is used as a stiffener, the sash and the like can be omitted, so that the number of members can be reduced. Therefore, it is possible to reduce the labor and material cost during construction. In addition, if wood is used as a constituent member, the effect of reducing carbon dioxide (CO 2 ) emissions can be expected. Further, since the buckling stiffener is in surface contact with the diagonal member and the diagonal member is supported by the surface, the load increase of the diagonal member is stable. Further, since wood has a specific gravity of about 1/3 that of glass but is ductile to compressive stress and bending stress, it does not break brittlely and can provide toughness to the bearing wall. ..
なお、前記補剛材の外周形状が前記開口部の周縁形状と同形状であれば、補剛材が格子(斜材)に密着して、効果的に座屈補剛することができる。
また、前記補剛材は直交集成材により構成してもよい。直交集成材は、ひき板(ラミナ)を繊維方向が直交するように重ねて接着されているので、交差する2方向の剛性や強度の差異が小さく、補剛効果に方向性が出にくい。また、繊維と直交する方向に打ち込まれる固定具(例えば、ビスやボルト等)により前記斜材に固定されていれば、接合部分の強度や一体性(ビスやボルトの定着力による分離抵抗)が高まるとともに、固定具による補剛材の破損が生じ難い。
また、前記補剛材は、繊維方向が斜材と平行な木材により構成し、前記斜材を挟持する状態で固定してもよい。前記補剛材が前記斜材の両面に沿うように配されて、前記斜材の弱軸方向から挟持する状態で固定されていれば、斜材の座屈を効果的に抑制することができる。
さらに、前記補剛材が複数の木材を組み合わせることにより枠状を呈している場合には、前記木材の木口同士が互いに対面するように所定の角度で斜めに加工されているのが望ましい。このようにすれば、木口面での繊維方向の違いによる剛性や強度の差がなくなり、力の伝達性に優れた枠状の補剛材を形成することができる。
If the outer peripheral shape of the stiffener has the same shape as the peripheral shape of the opening, the stiffener adheres to the lattice (oblique member) and can be effectively buckled and stiffened.
Further, the stiffener may be made of orthogonal laminated wood. In the orthogonal laminated wood, since the ground laminated wood (lamina) is laminated and bonded so that the fiber directions are orthogonal to each other, the difference in rigidity and strength in the two intersecting directions is small, and the stiffening effect is difficult to be directional. Further, if the diagonal member is fixed to the diagonal member by a fixture (for example, a screw or a bolt) that is driven in a direction orthogonal to the fiber, the strength and integrity of the joint portion (separation resistance due to the fixing force of the screw or bolt) is increased. As the height increases, the stiffener is less likely to be damaged by the fixture.
Further, the stiffener may be made of wood whose fiber direction is parallel to that of the diagonal member, and may be fixed in a state of sandwiching the diagonal member. If the stiffener is arranged along both sides of the diagonal member and fixed in a state of being sandwiched from the weak axis direction of the diagonal member, buckling of the diagonal member can be effectively suppressed. ..
Further, when the stiffener has a frame shape by combining a plurality of timbers, it is desirable that the stiffeners are diagonally processed at a predetermined angle so that the ends of the timbers face each other. In this way, the difference in rigidity and strength due to the difference in the fiber direction on the grain surface is eliminated, and a frame-shaped stiffener having excellent force transmission can be formed.
本発明の耐力壁によれば、格子の開口部に配設する補剛材として木製部材を使用するため、サッシ等を要することなく取り付けることができる。そのため、耐力壁を比較的簡易に形成することができ、施工時の手間と費用を削減することを可能となる。 According to the bearing wall of the present invention, since a wooden member is used as a stiffener to be arranged in the opening of the lattice, it can be attached without requiring a sash or the like. Therefore, the bearing wall can be formed relatively easily, and the labor and cost at the time of construction can be reduced.
第一実施形態に係る耐力壁を示す正面図である。It is a front view which shows the bearing wall which concerns on 1st Embodiment. 格子の斜材同士の接合部を示す分解斜視図である。It is an exploded perspective view which shows the joint part between the diagonal members of a lattice. 格子と補剛材との接合状況を示す分解斜視図である。It is an exploded perspective view which shows the bonding state of a lattice and a stiffener. 第二実施形態に係る耐力壁を示す正面図である。It is a front view which shows the bearing wall which concerns on 2nd Embodiment. 格子の展開図である。It is a development view of a grid. 格子と補剛材との接合状況を示す拡大図である。It is an enlarged view which shows the bonding state of a lattice and a stiffener. 他の形態に係る耐力壁を示す正面図である。It is a front view which shows the bearing wall which concerns on other forms. 特許文献1の耐力壁の荷重と変位の関係を示すグラフである。It is a graph which shows the relationship between the load and displacement of the bearing wall of Patent Document 1.
<第一実施形態>
第一実施形態では、図1に示すように、左右に立設された柱21,21と、これらの柱21,21の上下に横架された梁22,22とにより構成された梁柱架構2の内側空間に配設された耐力壁1について説明する。耐力壁1は、交差する第一斜材31および第二斜材32(以下、「第一斜材31」と「第二斜材32」を区別しない場合には、単に「斜材31,32」という)によって複数の開口部33が形成された格子3と、格子3の周囲を囲う枠材4と、格子3の開口部33に配設された補剛材5とを備えている。
<First Embodiment>
In the first embodiment, as shown in FIG. 1, a beam-column frame composed of columns 21 and 21 erected on the left and right and beams 22 and 22 laid vertically above and below these columns 21 and 21. The bearing wall 1 arranged in the inner space of 2 will be described. When the bearing wall 1 does not distinguish between the intersecting first diagonal member 31 and the second diagonal member 32 (hereinafter, "first diagonal member 31" and "second diagonal member 32", the bearing wall 1 is simply "oblique member 31, 32". A grid 3 in which a plurality of openings 33 are formed, a frame member 4 surrounding the grid 3, and a stiffener 5 arranged in the openings 33 of the grid 3 are provided.
格子3は、梁22に対して45°の角度で配設された第一斜材31と、梁22に対して135°の角度で配設された第二斜材32とを組み合わせることにより構成されている。すなわち、第一斜材31と第二斜材32とは互いに直交している。なお、第一斜材31と第二斜材32の傾斜角度は限定されるものではなく、適宜決定すればよい。すなわち、格子3の開口部は正方形や長方形に限定されるものではなく、縦長の菱形や横長の菱形であってもよい。第一斜材31および第二斜材32は、板状の鋼材(いわゆるフラットバー)からなり、それぞれ等間隔で複数本並設されている。斜材31,32は、板面が梁柱架構2の内周面に向くように配設されている。すなわち、隣り合う第一斜材31同士または隣り合う第二斜材32同士は、互いの板面同士が対向した状態で、間隔をあけて配設されている。第一斜材31および第二斜材32には、図2に示すように、それぞれスリット34が形成されている。スリット34は、第一斜材31と第二斜材32とが交差する位置に形成された凹字状の切り欠きであって、斜材31,32の板厚と同じ幅で、斜材31,32の幅(壁厚方向の長さ)の半分程度の深さに形成されている。第一斜材31および第二斜材32は、互いのスリット34同士をかみ合わせることにより格子3を形成している。第一斜材31および第二斜材32は、交差部(スリット34を噛み合わせた部分)において溶接接合されている。また、斜材31,32の両端は、枠材4の内面に溶接されている。なお、第一斜材31および第二斜材32の構成は限定されるものではなく、必ずしもスリット34同士を噛合せる接合構造である必要はない。 The lattice 3 is formed by combining a first diagonal member 31 arranged at an angle of 45 ° with respect to the beam 22 and a second diagonal member 32 arranged at an angle of 135 ° with respect to the beam 22. Has been done. That is, the first diagonal member 31 and the second diagonal member 32 are orthogonal to each other. The inclination angles of the first oblique member 31 and the second oblique member 32 are not limited and may be appropriately determined. That is, the opening of the lattice 3 is not limited to a square or a rectangle, and may be a vertically long rhombus or a horizontally long rhombus. The first diagonal member 31 and the second diagonal member 32 are made of plate-shaped steel material (so-called flat bar), and a plurality of the first diagonal member 31 and the second diagonal member 32 are arranged side by side at equal intervals. The diagonal members 31 and 32 are arranged so that the plate surface faces the inner peripheral surface of the beam column frame 2. That is, the adjacent first diagonal members 31 or the adjacent second diagonal members 32 are arranged at intervals with the plate surfaces facing each other. As shown in FIG. 2, slits 34 are formed in the first diagonal member 31 and the second diagonal member 32, respectively. The slit 34 is a concave notch formed at a position where the first diagonal member 31 and the second diagonal member 32 intersect, and has the same width as the plate thickness of the diagonal members 31 and 32, and the diagonal member 31. , 32 is formed to a depth of about half of the width (length in the wall thickness direction). The first diagonal member 31 and the second diagonal member 32 form a lattice 3 by engaging the slits 34 with each other. The first diagonal member 31 and the second diagonal member 32 are welded and joined at an intersection (a portion where the slit 34 is engaged). Further, both ends of the diagonal members 31 and 32 are welded to the inner surface of the frame member 4. The configurations of the first diagonal member 31 and the second diagonal member 32 are not limited, and the joint structure does not necessarily have to mesh the slits 34 with each other.
枠材4は、図1に示すように、左右一対の縦材41と上下一対の横材42とを組み合わせることにより、正面視矩形状に形成されている。縦材41および横材42は、板状の鋼材(いわゆるフラットバー)からなる。縦材41および横材42は、板面(外面)が梁柱架構2の内周面に向くように配設されている。すなわち、縦材41の板面は柱21の内面と平行で、横材42の板面は梁22の内面と平行である。なお、縦材41および横材42を構成する材料は板材に限定されるものではなく、例えば、H形鋼や溝型鋼等の鋼材を使用してもよい。枠材4と梁柱架構2との間には、所定の隙間が形成されている。梁柱架構2と枠材4との隙間には、充填材(モルタル等)6が充填されている。枠材4の外周面には複数のアンカー43が突設されており、梁柱架構2の内周面にもアンカー23が植設されている。枠材4と梁柱架構2は、アンカー23,43が充填材6に定着することで、互いに固定されている。 As shown in FIG. 1, the frame member 4 is formed in a rectangular shape in a front view by combining a pair of left and right vertical members 41 and a pair of upper and lower horizontal members 42. The vertical member 41 and the horizontal member 42 are made of a plate-shaped steel material (so-called flat bar). The vertical member 41 and the horizontal member 42 are arranged so that the plate surface (outer surface) faces the inner peripheral surface of the beam column frame 2. That is, the plate surface of the vertical member 41 is parallel to the inner surface of the column 21, and the plate surface of the horizontal member 42 is parallel to the inner surface of the beam 22. The material constituting the vertical member 41 and the horizontal member 42 is not limited to the plate material, and for example, steel materials such as H-shaped steel and channel steel may be used. A predetermined gap is formed between the frame member 4 and the beam column frame 2. The gap between the beam column frame 2 and the frame member 4 is filled with a filler (mortar or the like) 6. A plurality of anchors 43 are projected on the outer peripheral surface of the frame member 4, and anchors 23 are also planted on the inner peripheral surface of the beam column frame 2. The frame member 4 and the beam column frame 2 are fixed to each other by anchors 23 and 43 being fixed to the filler 6.
補剛材5は、図1に示すように、第一斜材31または第二斜材32に沿って形成された(斜め方向に並設された)複数の開口部33に対して、一つ置きに配設されている。すなわち、補剛材5は、格子3の複数の開口部33に対して千鳥状(市松模様状)に配設されていて、斜材31,32の表裏の板面のうち、補剛材5と正対している面の裏側(裏面側)の開口部33は解放されている。なお、補剛材5の配置は限定されるものではなく、例えば、全ての開口部33に配設してもよい。補剛材5は、木製のブロックにより構成されている。補剛材5の外周形状は、開口部33の周縁形状と同形状である。なお、補剛材5は板材であってもよい。 As shown in FIG. 1, one stiffener 5 is provided for a plurality of openings 33 (arranged in the diagonal direction) formed along the first diagonal member 31 or the second diagonal member 32. It is arranged everywhere. That is, the stiffener 5 is arranged in a staggered pattern (checkered pattern) with respect to the plurality of openings 33 of the lattice 3, and among the front and back plate surfaces of the diagonal members 31 and 32, the stiffener 5 The opening 33 on the back side (back side) of the surface facing the object is open. The arrangement of the stiffener 5 is not limited, and may be arranged in all the openings 33, for example. The stiffener 5 is made of a wooden block. The outer peripheral shape of the stiffener 5 is the same as the peripheral shape of the opening 33. The stiffener 5 may be a plate material.
補剛材5は、その外周の四面のうち、対向する一対の面(図1において、左上の面と右下の面)が隣り合う一対の第一斜材31に面接触した状態で、固定具7(図3参照)により第一斜材31に固定されている。また、補剛材5の対向する他の一対の面(図1において、右上の面と左下の面)が隣り合う一対の第二斜材32に面接触した状態で、固定具7により第二斜材32に固定されている。なお、斜材31,32に補剛材5を固定する際の固定具7の数および配置は限定されるものではなく、適宜決定すればよい。また、耐力壁1の外周囲に配設された補剛材5は、枠材4に面接触した状態で、固定具により枠材4に固定されている。なお、補剛材5は、格子3に固定されていればよく、必ずしも枠材4に固定する必要はない。補剛材5は、図3に示すように、繊維同士が直交するように複数の木製構成材が積層されてなる直交集成材により形成されていて、一方の繊維ひき板(ラミナ)の繊維が第一斜材31と略平行で、他方のひき板(ラミナ)の繊維が第二斜材32と略平行になるように配設されている。固定具7は、補剛材5の繊維と直交するように、補剛材5に固定する。固定具7には、高い引き抜き強度を有するものを使用するのが望ましく、本実施形態では全ねじタイプの長ねじ(ビス)を使用する。なお、固定具7を構成する材料は限定されるものではなく、例えばボルトや半ねじタイプの長ねじであってもよい。 The stiffener 5 is fixed in a state where a pair of facing surfaces (upper left surface and lower right surface in FIG. 1) of the four outer peripheral surfaces are in surface contact with a pair of adjacent first diagonal members 31. It is fixed to the first diagonal member 31 by the tool 7 (see FIG. 3). Further, in a state where the other pair of facing surfaces of the stiffener 5 (the upper right surface and the lower left surface in FIG. 1) are in surface contact with the pair of adjacent second diagonal members 32, the second is provided by the fixture 7. It is fixed to the diagonal member 32. The number and arrangement of the fixtures 7 when fixing the stiffeners 5 to the diagonal members 31 and 32 are not limited, and may be appropriately determined. Further, the stiffener 5 arranged around the outer periphery of the bearing wall 1 is fixed to the frame material 4 by a fixture in a state of being in surface contact with the frame material 4. The stiffener 5 may be fixed to the grid 3, and does not necessarily have to be fixed to the frame 4. As shown in FIG. 3, the stiffener 5 is formed of an orthogonal laminated wood in which a plurality of wooden constituent members are laminated so that the fibers are orthogonal to each other, and the fibers of one fiber ground plate (lamina) are formed. The fibers of the other glulam (lamina) are arranged so as to be substantially parallel to the first diagonal member 31 and substantially parallel to the second diagonal member 32. The fixture 7 is fixed to the stiffener 5 so as to be orthogonal to the fibers of the stiffener 5. It is desirable to use a fixture 7 having a high pull-out strength, and in the present embodiment, a full-thread type long screw (screw) is used. The material constituting the fixture 7 is not limited, and may be, for example, a bolt or a half-screw type long screw.
以上、第一実施形態の耐力壁1によれば、鋼製の板材(斜材31,32)を平使いで斜めに設けているため、格子3が圧縮・引張の両荷重を負担するブレースとして機能する。また、格子3の開口部33に木製の補剛材5を配置して、ビスやボルト等の固定具7により格子3と補剛材5とを固定しているため、格子3の座屈が抑制されている。
また、補剛材5として延性のある木製部材を使用しているため、耐力壁1の層間変形が進行し、補剛材5に過度な応力が作用した場合であっても、脆性的に破壊することがなく、耐力壁1に靭性をもたらすことができる。木材は、比較的小さい比重(例えば、ガラスの1/3程度)でありながら、圧縮応力や曲げ応力に対して延性があり、脆性的に破壊し難い。また、補剛材5として木材を使用することで、二酸化炭素(CO)排出量の低減化を期待することができる。補剛材5が木材により構成されているため、格子3や補剛材5の部材制作時に寸法誤差が生じた場合であっても、比較的容易に修正できる。また、補剛材として直交集成材を使用しているため、交差する2方向の剛性や強度に差異が小さく、補剛効果に方向性が生じ難い。
As described above, according to the bearing wall 1 of the first embodiment, since the steel plate members (diagonal members 31, 32) are provided diagonally by flat use, the lattice 3 serves as a brace that bears both compressive and tensile loads. Function. Further, since the wooden stiffener 5 is arranged in the opening 33 of the grid 3 and the grid 3 and the stiffener 5 are fixed by a fixture 7 such as a screw or a bolt, the lattice 3 buckles. It is suppressed.
Further, since a ductile wooden member is used as the stiffener 5, even if the bearing wall 1 is deformed between layers and excessive stress is applied to the stiffener 5, it breaks brittlely. It is possible to provide toughness to the bearing wall 1 without doing so. Although wood has a relatively small specific gravity (for example, about 1/3 of glass), it is ductile to compressive stress and bending stress, and is brittle and difficult to break. Further, by using wood as the stiffener 5, it can be expected that carbon dioxide (CO 2 ) emissions will be reduced. Since the stiffener 5 is made of wood, even if a dimensional error occurs during the production of the grid 3 or the stiffener 5, it can be corrected relatively easily. Further, since the orthogonal laminated wood is used as the stiffener, the difference in rigidity and strength in the two intersecting directions is small, and the stiffening effect is unlikely to be directional.
また、補剛材5は、固定具7により格子3に直接固定されているため、サッシや目地材等を必要としない。そのため、部材点数が少なく、経済的であるとともに、施工時の手間が少ない。
また、補剛材5は、固定具7により格子3に締着しているため、引張力に対しても抵抗することができる。したがって、斜材31,32の一面側のみに補剛材5が固定されている場合において、斜材31,32に対して補剛材5が固定されている面と反対側に座屈する力が作用した場合であっても、固定具7を介した補剛材5の引張抵抗力によって座屈を抑制することができる。固定具は、繊維と直交するように固定されているため、接合部分の強度や一体性(ビスやボルトの締着力による分離抵抗)が高まるとともに、固定具による補剛材の破損が生じ難い。
Further, since the stiffener 5 is directly fixed to the lattice 3 by the fixture 7, no sash, joint material, or the like is required. Therefore, the number of members is small, which is economical and requires less labor during construction.
Further, since the stiffener 5 is fastened to the lattice 3 by the fixture 7, it can resist the tensile force. Therefore, when the stiffener 5 is fixed only on one surface side of the diagonal members 31 and 32, the force of buckling the stiffener 5 on the opposite side to the surface on which the stiffener 5 is fixed is applied to the diagonal members 31 and 32. Even when it acts, buckling can be suppressed by the tensile resistance force of the stiffener 5 via the fixture 7. Since the fixture is fixed so as to be orthogonal to the fiber, the strength and integrity of the joint portion (separation resistance due to the tightening force of screws and bolts) are increased, and the stiffener is less likely to be damaged by the fixture.
<第二実施形態>
第二実施形態では、図4に示すように、左右に立設された柱21,21と、これらの柱21,21の上下に横架された梁22,22とにより構成された梁柱架構2の内側空間に配設された耐力壁1について説明する。耐力壁1は、交差する斜材31、32によって複数の開口部33が形成された格子3と、格子3の周囲を囲う枠材4と、格子3の開口部33に配設された補剛材5とを備えている。なお、枠材4の詳細は、第一実施形態の枠材4と同様なため、詳細な説明は省略する。
<Second embodiment>
In the second embodiment, as shown in FIG. 4, a beam-column frame composed of columns 21 and 21 erected on the left and right and beams 22 and 22 laid vertically above and below these columns 21 and 21. The bearing wall 1 arranged in the inner space of 2 will be described. The load-bearing wall 1 includes a lattice 3 in which a plurality of openings 33 are formed by intersecting diagonal members 31 and 32, a frame member 4 surrounding the lattice 3, and stiffening arranged in the openings 33 of the lattice 3. It is provided with a material 5. Since the details of the frame material 4 are the same as those of the frame material 4 of the first embodiment, detailed description thereof will be omitted.
格子3は、梁22に対して45°の角度で配設された第一斜材31と、梁22に対して135°の角度で配設された第二斜材32とを組み合わせることにより構成されている。すなわち、第一斜材31と第二斜材32とは互いに直交している。なお、第一斜材31と第二斜材32の傾斜角度は限定されるものではなく、適宜決定すればよい。第一斜材31および第二斜材32は、板状の鋼材(いわゆるフラットバー)からなり、それぞれ等間隔で複数本並設されている。斜材31,32は、板面が梁柱架構2の内周面に向くように配設されている。すなわち、隣り合う第一斜材31同士または隣り合う第二斜材32同士は、互いの板面同士が対向した状態で、間隔をあけて配設されている。第一斜材31は、図5に示すように、第二斜材32同士の間隔の1倍、3倍または4倍の長さを有しており、第一斜材31の両端は枠材4に固定(溶接)されている。一方、第二斜材32は、第一斜材31同士の間隔と同じ長さを有していて、第二斜材32の両端は第一斜材31に固定(溶接)されている。なお、板面が耐力壁1の角部に面する第二斜材32の両端は、第一斜材31と枠材4に固定されている。また、その他の枠材4に面する第二斜材32の枠材4側の端部は、第一斜材31と枠材4に固定されている。なお、第一斜材31および第二斜材32の構成は限定されるものではない。 The lattice 3 is formed by combining a first diagonal member 31 arranged at an angle of 45 ° with respect to the beam 22 and a second diagonal member 32 arranged at an angle of 135 ° with respect to the beam 22. Has been done. That is, the first diagonal member 31 and the second diagonal member 32 are orthogonal to each other. The inclination angles of the first oblique member 31 and the second oblique member 32 are not limited and may be appropriately determined. The first diagonal member 31 and the second diagonal member 32 are made of plate-shaped steel material (so-called flat bar), and a plurality of the first diagonal member 31 and the second diagonal member 32 are arranged side by side at equal intervals. The diagonal members 31 and 32 are arranged so that the plate surface faces the inner peripheral surface of the beam column frame 2. That is, the adjacent first diagonal members 31 or the adjacent second diagonal members 32 are arranged at intervals with the plate surfaces facing each other. As shown in FIG. 5, the first diagonal member 31 has a length of 1, 3, or 4 times the distance between the second diagonal members 32, and both ends of the first diagonal member 31 are frame members. It is fixed (welded) to 4. On the other hand, the second diagonal member 32 has the same length as the distance between the first diagonal members 31, and both ends of the second diagonal member 32 are fixed (welded) to the first diagonal member 31. Both ends of the second diagonal member 32 whose plate surface faces the corner of the bearing wall 1 are fixed to the first diagonal member 31 and the frame member 4. Further, the end portion of the second diagonal member 32 facing the other frame member 4 on the frame member 4 side is fixed to the first diagonal member 31 and the frame member 4. The configurations of the first diagonal member 31 and the second diagonal member 32 are not limited.
補剛材5は、図4に示すように、複数の木製の板材(枠構成板材51)を組み合わせることにより枠状を呈していて、各開口部33に配設されている。すなわち、斜材31,32は、補剛材5によって上下から挟持されている。枠構成板材51の木口は、枠構成板材51の長手方向に対して45°で斜めに加工されている。四本の枠構成板材51を、木口同士を突き合せた状態で接合することにより、内角が90°の枠状の補剛材5が形成されている。なお、枠構成板材51の木口の角度は、限定されるものではなく、木口同士を突き合せた際の内角が、格子3の開口部の内角(斜材31,32同士が交差する角度)と同じ角度になるようにすればよい。また、枠構成板材51の木口同士は必ずしも接している必要ななく、隙間を有していてもよい。また、枠構成板材51同士は、必ずしも固定されている必要はない。枠構成板材51は、斜材31,32の板面に面接触した状態で、斜材31,32に固定具7を介して固定されている。枠構成板材51は、面接触する斜材31,32の軸方向と繊維の方向がほぼ平行になるように配設する。なお、枠構成板材51の繊維の方向は、必ずしも斜材31,32と平行である必要はない。図6に示すように、同一の斜材31,32を挟む上下の枠構成板材51は、同一の固定具7により固定する。固定具7は、枠構成板材51の繊維と直交している。固定具7には、高い引き抜き強度を有するものを使用するのが望ましく、本実施形態ではボルトを使用する。なお、固定具7を構成する材料は限定されるものではなく、例えば半ねじタイプの長ねじや全ねじタイプの長ねじ(ビス)であってもよい。また、斜材31,32の上下に配設された枠構成板材51は、必ずしも同一の固定具7により固定されている必要はなく、個別に斜材31,32に固定されていてもよい。 As shown in FIG. 4, the stiffener 5 has a frame shape by combining a plurality of wooden plate members (frame constituent plate members 51), and is arranged in each opening 33. That is, the diagonal members 31 and 32 are sandwiched from above and below by the stiffener 5. The end of the frame constituent board 51 is processed obliquely at 45 ° with respect to the longitudinal direction of the frame constituent board 51. A frame-shaped stiffener 5 having an internal angle of 90 ° is formed by joining the four frame-constituting plate members 51 in a state where the wood ends are butted against each other. The angle of the wood end of the frame constituent board 51 is not limited, and the internal angle when the wood ends are butted against each other is the internal angle of the opening of the lattice 3 (the angle at which the diagonal members 31 and 32 intersect). The angles should be the same. Further, the wood ends of the frame constituent board 51 do not necessarily have to be in contact with each other, and may have a gap. Further, the frame constituent plate members 51 do not necessarily have to be fixed to each other. The frame constituent plate member 51 is fixed to the diagonal members 31 and 32 via the fixture 7 in a state of being in surface contact with the plate surfaces of the diagonal members 31 and 32. The frame constituent plate member 51 is arranged so that the axial direction of the diagonal members 31 and 32 in surface contact and the fiber direction are substantially parallel to each other. The fiber direction of the frame constituent plate 51 does not necessarily have to be parallel to the diagonal members 31 and 32. As shown in FIG. 6, the upper and lower frame constituent plate members 51 sandwiching the same diagonal members 31 and 32 are fixed by the same fixture 7. The fixture 7 is orthogonal to the fibers of the frame constituent plate member 51. It is desirable to use a fixture 7 having a high pull-out strength, and in this embodiment, a bolt is used. The material constituting the fixture 7 is not limited, and may be, for example, a half-screw type long screw or a full-screw type long screw (screw). Further, the frame constituent plate members 51 arranged above and below the diagonal members 31 and 32 do not necessarily have to be fixed by the same fixture 7, and may be individually fixed to the diagonal members 31 and 32.
以上、第二実施形態の耐力壁1によれば、鋼製の板材(斜材31,32)を平使いで斜めに設けているため、格子3が圧縮・引張の両荷重を負担するブレースとして機能する。また、格子3の開口部33に木製の補剛材5を配置して、ビスやボルト等の固定具7により格子3と補剛材5とを固定しているため、格子3の座屈が抑制されている。
また、補剛材5として延性のある木製部材を使用しているため、耐力壁1の層間変形が進行し、補剛材5に過度な応力が作用した場合であっても、脆性的に破壊することがなく、耐力壁1に靭性をもたらすことができる。また、補剛材5が木材により構成されているため、格子3や補剛材5の部材制作時に寸法誤差が生じた場合であっても、比較的容易に修正できる。また、補剛材5を木材により構成することで、二酸化炭素(CO)排出量の低減化を図ることができる。
As described above, according to the bearing wall 1 of the second embodiment, since the steel plate members (diagonal members 31, 32) are provided diagonally by flat use, the lattice 3 serves as a brace that bears both compressive and tensile loads. Function. Further, since the wooden stiffener 5 is arranged in the opening 33 of the grid 3 and the grid 3 and the stiffener 5 are fixed by a fixture 7 such as a screw or a bolt, the lattice 3 buckles. It is suppressed.
Further, since a ductile wooden member is used as the stiffener 5, even if the bearing wall 1 is deformed between layers and excessive stress is applied to the stiffener 5, it breaks brittlely. It is possible to provide toughness to the bearing wall 1 without doing so. Further, since the stiffener 5 is made of wood, even if a dimensional error occurs when the lattice 3 or the stiffener 5 is manufactured, it can be corrected relatively easily. Further, by forming the stiffener 5 from wood, it is possible to reduce carbon dioxide (CO 2 ) emissions.
また、補剛材5は、固定具7により格子3に直接固定されているため、サッシや目地材等を必要としない。そのため、部材点数が少なく、経済的であるとともに、施工時の手間が少ない。
また、補剛材5は、繊維方向が斜材31,32と平行な木材であり、斜材31,32を挟持した状態で固定されているため、斜材の弱軸方向から挟持することで斜材31,32の座屈を効果的に抑制できる。
枠構成板材51同士は、木口面での繊維方向の違いによる合成や強度の差がなくなり、力の伝達性に優れた枠状の補剛材5を形成することができる。そのため、格子3(斜材31,32)の座屈を効果的に抑制できるとともに、枠構成板材51同士の接合部が弱部になることが抑制されている。
Further, since the stiffener 5 is directly fixed to the lattice 3 by the fixture 7, no sash, joint material, or the like is required. Therefore, the number of members is small, which is economical and requires less labor during construction.
Further, since the stiffener 5 is a wood whose fiber direction is parallel to the diagonal members 31 and 32 and is fixed in a state where the diagonal members 31 and 32 are sandwiched, the stiffener 5 can be sandwiched from the weak axis direction of the diagonal members. The buckling of the diagonal members 31 and 32 can be effectively suppressed.
The frame-constituting plate members 51 can form a frame-shaped stiffener 5 having excellent force transmission because there is no difference in composition or strength due to a difference in fiber direction on the end surface of the wood. Therefore, the buckling of the lattice 3 (diagonal members 31, 32) can be effectively suppressed, and the joint portion between the frame constituent plate members 51 is suppressed to be a weak portion.
以上、本発明の実施形態について説明したが、本発明は、前述の各実施形態に限られず、各構成要素については、本発明の趣旨を逸脱しない範囲で適宜設計変更が可能である。
耐力壁1は、既設の梁柱架構2にあと施工により取り付けてもよいし、新設の建物に設置してもよい。
また、耐力壁1は、梁柱架構2に対して、枠材4を直接固定してもよい。
格子3を構成する斜材31,32の角度および間隔は限定されるものではなく、適宜決定すればよい。
また、補剛材5の板厚を調整することや、補剛材5を構成する材料(木の種類)を選択することにより、耐力壁1に対して要求される耐力・剛性を設定してもよい。
補剛材5を構成する材料は、直交集成材に限定されるものではなく、例えば、無垢材、集成材、単板積層材を使用してもよい。また、補剛材5は、必ずしも繊維と直交する固定具により斜材に固定する必要はなく、例えば、繊維に対して傾斜した固定具7や繊維と平行な固定具7により斜材に固定してもよい。
また、補剛材5の形状は、前記各実施形態で示したものに限定されるものではなく、例えば、図7に示すように、格子3の開口33の下半分を遮蔽するように三角形状であってもよい。なお、三角形状の補剛材5は、開口33の上半分や、横半分を遮蔽するように設けてもよい。
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the design of each component can be appropriately changed without departing from the spirit of the present invention.
The bearing wall 1 may be attached to the existing beam column frame 2 by post-construction, or may be installed in a new building.
Further, the bearing wall 1 may directly fix the frame member 4 to the beam column frame 2.
The angles and spacings of the diagonal members 31 and 32 constituting the lattice 3 are not limited and may be appropriately determined.
Further, by adjusting the plate thickness of the stiffener 5 and selecting the material (type of wood) constituting the stiffener 5, the proof stress and rigidity required for the bearing wall 1 are set. May be good.
The material constituting the stiffener 5 is not limited to the orthogonal laminated wood, and for example, solid wood, laminated wood, and single plate laminated material may be used. Further, the stiffener 5 does not necessarily have to be fixed to the diagonal member by a fixture orthogonal to the fiber, and is fixed to the diagonal member by, for example, a fixture 7 inclined with respect to the fiber or a fixture 7 parallel to the fiber. You may.
Further, the shape of the stiffener 5 is not limited to that shown in each of the above-described embodiments. For example, as shown in FIG. 7, the shape of the stiffener 5 is triangular so as to shield the lower half of the opening 33 of the lattice 3. It may be. The triangular stiffener 5 may be provided so as to shield the upper half and the horizontal half of the opening 33.
1 耐力壁
2 梁柱架構
21 柱
22 梁
23 アンカー
3 格子
31 第一斜材
32 第二斜材
33 開口部
4 枠材
41 縦材
42 横材
43 アンカー
5 補剛材
6 充填材
7 固定具
1 Load-bearing wall 2 Beam column frame 21 Pillar 22 Beam 23 Anchor 3 Lattice 31 First diagonal material 32 Second diagonal material 33 Opening 4 Frame material 41 Vertical material 42 Horizontal material 43 Anchor 5 Stiffening material 6 Filler 7 Fixture

Claims (4)

  1. 交差する斜材によって複数の開口部が形成された格子と、
    前記格子の周囲を囲う枠材と、を備える耐力壁であって、
    前記斜材は、板状の鋼材からなり、
    複数の前記開口部の少なくとも一部には、前記斜材と面接触する木製の補剛材が配設されていることを特徴とする、耐力壁。
    A grid with multiple openings formed by intersecting diagonal members,
    A bearing wall comprising a frame material surrounding the lattice.
    The diagonal member is made of plate-shaped steel.
    A bearing wall, characterized in that at least a part of the plurality of openings is provided with a wooden stiffener that comes into surface contact with the diagonal member.
  2. 前記補剛材の外周形状が、前記開口部の周縁形状と同形状であることを特徴とする、請求項1に記載の耐力壁。 The bearing wall according to claim 1, wherein the outer peripheral shape of the stiffener has the same shape as the peripheral shape of the opening.
  3. 前記補剛材は、直交集成材からなることを特徴とする、請求項1または請求項2に記載の耐力壁。 The bearing wall according to claim 1 or 2, wherein the stiffener is made of orthogonal laminated wood.
  4. 前記補剛材は、繊維方向が斜材と平行な木材であり、前記斜材を挟持する状態で固定されていることを特徴とする、請求項1または請求項2に記載の耐力壁。 The bearing wall according to claim 1 or 2, wherein the stiffener is wood whose fiber direction is parallel to that of the diagonal member, and is fixed in a state of sandwiching the diagonal member.
JP2019040978A 2019-03-06 2019-03-06 Bearing wall Pending JP2020143502A (en)

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