JP2015094201A - Support structure of intermediate story floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support structure of an intermediate story floor that improves freedom of fitting positions and fitting works without deteriorating the performance of an intermediate beam of a floor frame and the like forming an intermediate story.SOLUTION: A support structure of an intermediate story floor includes columns 4A to 4D and beams 5 constructed between adjacent columns. On predetermined stories except a first floor and a roof floor, a floor area A1 in which a floor is constructed and a non-floor area A2 are formed. The beams 5 are provided on four peripheries of the non-floor area A2 respectively, and an intermediate beam is provided along the beams 5 defining the non-floor area A2 in a planar view, at a position lower than the beams 5 defining the non-floor area A2 and higher than a footing beam. A floor plate B constituting an intermediate story floor F3 is supported by the intermediate beam. Studs 11A to 11D supporting the intermediate beam are fixed to the beams 5 defining the non-floor area A2 and the footing beam. The intermediate beam has an open cross section, is formed in a long shape, and includes a junction bonded to the studs.

Description

本発明は、住宅等の建物における中間階床の支持構造に関する。   The present invention relates to a support structure for an intermediate floor in a building such as a house.

互いに直交する複数の通芯の交点に柱が立設され、隣り合う柱間に梁が架設されて構成された軸組構造の建物が知られている。この建物の床は、梁に床板が敷設されて形成される。   There is known a building having a frame structure in which pillars are erected at intersections of a plurality of perpendicular cores and beams are constructed between adjacent pillars. The floor of this building is formed by laying floor boards on beams.

この種の建物の中には、一般的な階高を構成する上下の床の中間部に床が設けられたものが知られている。例えば、特許文献１には、隣り合う柱間に腕木を備えた複数の間柱を設け、この間柱の中途から持ち出された腕木で床フレームと床板とを有する中間階床を支持する構造が記載されている。   Some buildings of this type are known in which a floor is provided in the middle of the upper and lower floors that constitute a general floor height. For example, Patent Document 1 describes a structure in which a plurality of studs provided with arms are provided between adjacent pillars, and an intermediate floor having a floor frame and a floor board is supported by arms taken from the middle of the studs. ing.

特開２００９−２９９４１６号公報JP 2009-299416 A

しかしながら、上記特許文献１に開示の構造では、床フレームが閉断面にて形成されており、側面には、腕木を嵌め込んで固定するための切り欠きが必要となる。つまり、腕木を固定する位置には切欠きが必須であるため、中間梁に対する腕木（間柱）の設置位置の自由度が損なわれる。また、切欠きが必須であるために腕木との接合箇所の強度が局所的に低くなり易く、中間床を形成する床フレームの性能低下を生じ易かった。   However, in the structure disclosed in Patent Document 1, the floor frame is formed in a closed cross section, and a cutout is required on the side surface to fit and fix the arm. That is, since a notch is indispensable in the position which fixes an arm, the freedom degree of the installation position of the arm (inter-column) with respect to an intermediate beam is impaired. Further, since the notch is essential, the strength of the joint portion with the arm is likely to be locally reduced, and the performance of the floor frame forming the intermediate floor is likely to be deteriorated.

本発明は、中間階を形成する床フレーム等の中間梁の強度面での性能低下を生じさせることなく、取り付け位置及び取り付け作業の自由度を向上させることができる構造を提供することを目的とする。   It is an object of the present invention to provide a structure capable of improving the mounting position and the degree of freedom of mounting work without causing a performance deterioration in the strength surface of the intermediate beam such as a floor frame forming the intermediate floor. To do.

上記課題を解決すべく、本発明は、互いに平行な複数の第１の通芯と、互いに平行であって且つ該第１の通芯に直交する複数の第２の通芯との交点に立設される柱と、隣り合う柱間に配設される梁と、梁に支持される床と、を備えた複数階建て建物における、中間階床の支持構造であって、１階及び屋上階を除く所定の階において、床が敷設された有床領域と、床が敷設されない矩形状の無床領域とが形成されており、無床領域の四周には、無床領域を画成する梁が配設されており、無床領域の内部において、平面視で、無床領域を画成する梁に沿うと共に、無床領域を画成する梁よりも低く且つ下階の梁よりも高い位置に、中間梁が設けられ、当該中間梁にて中間階床を構成する床材が支持されており、中間梁を支持する支持手段は、無床領域を画成する梁もしくはその直下の下階の梁の少なくとも一方に固定されており、中間梁は、開断面を有して長尺状に形成されると共に、支持手段に接合される接合部を備えていることを特徴とする。   In order to solve the above problems, the present invention stands at the intersection of a plurality of first cores parallel to each other and a plurality of second cores parallel to each other and perpendicular to the first core. A support structure for an intermediate floor in a multi-storey building comprising a pillar provided, a beam disposed between adjacent pillars, and a floor supported by the beam, the first floor and the rooftop floor A floor area where floors are laid and a rectangular non-floor area where floors are not laid are formed on a predetermined floor excluding, and beams that define the no-floor area are formed around the four floors of the non-floor area. Is located in the interior of the floorless area along the beam that defines the floorless area in a plan view, and is lower than the beam that defines the floorless area and higher than the beam on the lower floor Are provided with intermediate beams, and the intermediate beams are used to support the floor material constituting the intermediate floor. The intermediate beam is formed in an elongated shape with an open cross-section and is joined to the support means. It is characterized by having.

上記の中間階床の支持構造では、中間梁は開断面を有している。したがって、支持手段との接合部に支持手段を嵌め込むための過度の切欠き等は不要であり、ボルト穴等の必要最小限の加工で足りるので、特に強度面での性能低下の抑制に有効である。更に、接合部に特別な切欠き等は不要であるため、支持手段との接合箇所の選択の自由度は高く、また、取り付け作業の自由度も高い。その結果として、中間梁の性能低下を生じさせることなく、取り付け位置及び取り付け作業の自由度を向上させることができる。   In the above intermediate floor support structure, the intermediate beam has an open cross section. Therefore, excessive notch or the like for fitting the support means in the joint with the support means is unnecessary, and the minimum necessary processing such as bolt holes is sufficient, so it is effective for suppressing the performance degradation especially in terms of strength. It is. Furthermore, since a special notch or the like is not necessary for the joint portion, the degree of freedom of selection of the joint portion with the support means is high, and the degree of freedom of attachment work is also high. As a result, the attachment position and the degree of freedom of the attachment work can be improved without causing the performance of the intermediate beam to deteriorate.

また、中間梁における接合部の断面性能は、接合部以外の一般部のうち、断面性能が最も小さい部分の断面性能と同等以上であると好適である。この場合、接合部の強度が、他の一般部に比べて局所的に低下することは無く、中間梁の強度面での性能を一定以上に確保し易い。   Moreover, it is suitable that the cross-sectional performance of the joint portion in the intermediate beam is equal to or higher than the cross-sectional performance of the portion having the smallest cross-sectional performance among the general portions other than the joint portion. In this case, the strength of the joint portion does not decrease locally as compared with other general portions, and it is easy to ensure a certain level of performance on the strength surface of the intermediate beam.

また、支持手段は、無床領域を画成する梁の下方に立設される間柱であり、間柱は、本体部と、該本体部の中途から持ち出されたブラケット部と、を有し、ブラケット部は、中間梁の高さ寸法よりも小さい高さ寸法を有し、中間梁の側面に接合されていると好適である。ブラケット部の高さが、中間梁の高さよりも小さいということは、ブラケット部を中間梁の側面に接合した場合に、ブラケット部の上端と下端とが、それぞれ中間梁の上方、または下方から突出しないことを意味する。その結果、中間梁の上方においては、ブラケット部が邪魔にならないので中間階における床の敷設が容易となる。また、中間梁の下方では、凹凸がなくかつ高い天井を有する空間を形成することができる。   Further, the support means is a stud that is erected below the beam that defines the floorless region, and the stud has a main body portion and a bracket portion that is brought out from the middle of the main body portion. It is preferable that the portion has a height dimension smaller than the height dimension of the intermediate beam and is joined to the side surface of the intermediate beam. The height of the bracket part is smaller than the height of the intermediate beam. When the bracket part is joined to the side surface of the intermediate beam, the upper and lower ends of the bracket part protrude from above or below the intermediate beam, respectively. It means not. As a result, since the bracket portion does not get in the way above the intermediate beam, it is easy to lay the floor on the intermediate floor. Further, a space having no unevenness and a high ceiling can be formed below the intermediate beam.

また、中間梁は、Ｈ形鋼からなり、ブラケット部は、中間梁のウェブに面接触する鉛直面部を有し、該鉛直面部がウェブに締結固定されていると好適である。Ｈ形鋼からなる中間梁のウェブにブラケット部を直接接合することになるので、中間梁の支持強度の向上及び部品点数の削減に有効である。   Further, it is preferable that the intermediate beam is made of H-shaped steel, and the bracket portion has a vertical surface portion in surface contact with the web of the intermediate beam, and the vertical surface portion is fastened and fixed to the web. Since the bracket portion is directly joined to the web of the intermediate beam made of H-shaped steel, it is effective in improving the support strength of the intermediate beam and reducing the number of parts.

また、建物の外周壁は外壁材と内装壁材とを有し、外壁材と内装壁材との間には壁体内空間が形成されており、中間階床の上面に設けられた床仕上層は、外周壁に接しており、中間階床を構成する床材は外壁材とは離隔していると好適である。この場合、壁体内空間は中間階床の上方と下方とで連通するので、配線や配管を上下に通す際に都合がよい。また、壁体内空間に断熱材を配設する際に中間階床の位置で断熱材を分断する必要がない。   Further, the outer peripheral wall of the building has an outer wall material and an interior wall material, and a wall space is formed between the outer wall material and the interior wall material, and the floor finishing layer provided on the upper surface of the intermediate floor Is preferably in contact with the outer peripheral wall, and the floor material constituting the intermediate floor is separated from the outer wall material. In this case, since the wall space communicates between the upper part and the lower part of the intermediate floor, it is convenient when passing wiring and piping up and down. Further, when the heat insulating material is disposed in the wall space, it is not necessary to divide the heat insulating material at the position of the intermediate floor.

本発明によれば、中間階床を支持する中間梁の強度面での性能低下を生じさせることなく、取り付け位置及び取り付け作業の自由度を向上させることができる。   ADVANTAGE OF THE INVENTION According to this invention, the attachment position and the freedom degree of attachment work can be improved, without producing the performance fall in the strength surface of the intermediate beam which supports an intermediate floor.

本発明の実施形態に係る建物の概略を示す側断面図である。It is a sectional side view which shows the outline of the building which concerns on embodiment of this invention. 本実施形態に係る建物の概略を示す平断面図である。It is a plane sectional view showing the outline of the building concerning this embodiment. 図２のＩＩＩ−ＩＩＩ線に沿った断面図である。It is sectional drawing along the III-III line of FIG. 本実施形態に係る柱、梁、間柱、及び中間梁の接合を示す斜視図である。It is a perspective view which shows joining of the pillar which concerns on this embodiment, a beam, an intermediary pillar, and an intermediate beam. 本実施形態に係る間柱の側面図である。It is a side view of the stud concerning this embodiment. 間柱を示す図であり、（ａ）は図５のＶＩ−ＶＩ線に沿った断面図であり、（ｂ）は（ａ）のｂ−ｂ線に沿った断面図である。It is a figure which shows a stud, (a) is sectional drawing along the VI-VI line of FIG. 5, (b) is sectional drawing along the bb line of (a). 第１中間梁を示す図であり、（ａ）は側面図であり、（ｂ）は（ａ）のｂ−ｂ線に沿った断面図であり、（ｃ）は（ａ）のｃ−ｃ線に沿った断面図である。It is a figure which shows a 1st intermediate beam, (a) is a side view, (b) is sectional drawing along the bb line of (a), (c) is cc of (a). It is sectional drawing along a line. 第２中間梁を示す図であり、（ａ）は側面図であり、（ｂ）は（ａ）のｂ−ｂ線に沿った断面図であり、（ｃ）は（ａ）のｃ−ｃ線に沿った断面図である。It is a figure which shows a 2nd intermediate beam, (a) is a side view, (b) is sectional drawing along the bb line of (a), (c) is cc of (a). It is sectional drawing along a line. 第２中間梁の端部の拡大図である。It is an enlarged view of the edge part of a 2nd intermediate beam. 第２中間梁の端部を示す図であり、（ａ）は図９のＸ−Ｘ線に沿った断面図であり、（ｂ）は（ａ）のｂ−ｂ線に沿った断面図である。It is a figure which shows the edge part of a 2nd intermediate beam, (a) is sectional drawing along XX of FIG. 9, (b) is sectional drawing along bb line of (a). is there. 図２のＸＩ−ＸＩ線に沿った断面図である。It is sectional drawing along the XI-XI line of FIG.

以下、図面を参照して本発明に係る中間階床の支持構造の実施形態を説明する。図１、及び図２に示されるように、本実施形態に係る建物１は、鉄骨造の梁勝ち架構を有する２階建て（２層構成）の工業化住宅であり、予め規格化（標準化）された構造部材の組み合わせによって架構が構成される。構造部材としては、躯体を構成する柱や梁等の他、床板や中間梁等も含まれ、各構造部材は、工場にて製造され、建築現場にて組み立て作業がなされる。   Hereinafter, an embodiment of a support structure for an intermediate floor according to the present invention will be described with reference to the drawings. As shown in FIG. 1 and FIG. 2, the building 1 according to the present embodiment is a two-story (two-layered) industrialized house having a steel beam-winning frame, and is standardized (standardized) in advance. The frame is configured by a combination of structural members. As structural members, in addition to pillars and beams constituting the frame, floor boards and intermediate beams are also included. Each structural member is manufactured at a factory and assembled at a construction site.

また、建物１は、３０５ｍｍの平面モジュール（Ｍ）を有し、柱や梁（基礎梁を含む）は、平面モジュール（Ｍ）の整数倍の間隔で規定された通芯上に配置される。具体的には、通芯は、例えば、互いに平行な複数の横の通芯（第１の通芯）Ｌ１，Ｌ２と、互いに平行な複数の縦の通芯（第２の通芯）Ｌ３，Ｌ４とが互いに直交して格子状をなし、第１の通芯と第２の通芯との交点に柱が立設される。   Moreover, the building 1 has a 305 mm planar module (M), and columns and beams (including foundation beams) are arranged on a grid that is defined by an integral multiple of the planar module (M). Specifically, the cores are, for example, a plurality of horizontal cores (first cores) L1, L2 parallel to each other and a plurality of vertical cores (second cores) L3, parallel to each other. L4 is orthogonal to each other to form a lattice, and a column is erected at the intersection of the first core and the second core.

建物１は、１階床Ｆ１と２階床Ｆ２とを備え、更に、１階床Ｆ１と２階床Ｆ２との中間の高さに中間階床Ｆ３が設けられ、また、１階における中間階床Ｆ３の下方の領域に、１階床Ｆ１よりも一段下がった１階低床Ｆ４が形成されている。また、中間階床Ｆ３は、１階床Ｆ１から２階床Ｆ２までの高さを等分する位置ではなく、２階床Ｆ２寄りにずれて設けられている（図３参照）。また、建物１は、１階と中間階とを連絡する下側階段２と、中間階と２階とを連絡する上側階段３と、を備えている。
［２階及び非階床空間］ The building 1 includes a first floor F1 and a second floor F2, and an intermediate floor F3 is provided at an intermediate height between the first floor F1 and the second floor F2, and an intermediate floor on the first floor. In the region below the floor F3, a first floor low floor F4 is formed which is one step lower than the first floor F1. Further, the intermediate floor F3 is not located at a position where the height from the first floor F1 to the second floor F2 is equally divided, but is shifted toward the second floor F2 (see FIG. 3). The building 1 includes a lower staircase 2 that connects the first floor and the intermediate floor, and an upper staircase 3 that connects the intermediate floor and the second floor.
[Second floor and non-floor space]

図２は、建物１の概略を示す平断面図である。図２に示されるように、複数の柱４Ａ，４Ｂ，４Ｃ，４Ｄは、第１の通芯Ｌ１，Ｌ２と第２の通芯Ｌ３，Ｌ４との計４つの交点にそれぞれ立設されている。より具体的には、柱４Ａは、第１の通芯Ｌ１と第２の通芯Ｌ３との交点に、柱４Ｂは、第１の通芯Ｌ１と第２の通芯Ｌ４との交点に、柱４Ｃは、第１の通芯Ｌ２と第２の通芯Ｌ４との交点に、柱４Ｄは、第１の通芯Ｌ２と第２の通芯Ｌ３との交点に、それぞれ立設されている。隣り合う柱４Ａ〜４Ｄ間には、梁５（２階梁）が架設されている。２階床レベルの領域は、床が敷設された有床領域Ａ１と床が敷設されない矩形状の無床領域（２階床レベルにおいて床が存在しない領域という意味）Ａ２とに分かれている。   FIG. 2 is a plan sectional view showing an outline of the building 1. As shown in FIG. 2, the plurality of pillars 4A, 4B, 4C, 4D are respectively erected at four intersections of the first cores L1, L2 and the second cores L3, L4. . More specifically, the column 4A is at the intersection of the first core L1 and the second core L3, and the column 4B is at the intersection of the first core L1 and the second core L4. The column 4C is erected at the intersection of the first core L2 and the second core L4, and the column 4D is erected at the intersection of the first core L2 and the second core L3. . A beam 5 (second floor beam) is installed between the adjacent columns 4A to 4D. The area of the second floor level is divided into a floor area A1 where the floor is laid and a rectangular non-floor area where the floor is not laid (meaning that there is no floor at the second floor level) A2.

有床領域Ａ１には、平行に架設された梁５間に小梁が適宜に架設されており、梁５上、及び小梁上にＡＬＣ（軽量気泡コンクリート）パネルからなる床板Ｂが敷設されることで２階床Ｆ２が形成されている。一方で、無床領域Ａ２には、床板Ｂが敷設されておらず、床開口部Ｓが形成されている。無床領域Ａ２は、柱４Ａと柱４Ｂの間で第１の通芯Ｌ１上に架設された梁５と、柱４Ｃと４Ｄとの間で第１の通芯Ｌ２上に架設された梁５と、柱４Ａと柱４Ｄとの間で第２の通芯Ｌ３上に架設された梁５と、柱４Ｂと柱４Ｃとの間で第２の通芯Ｌ４上に架設された梁５と、によって画成されている。すなわち、無床領域Ａ２の四周には、無床領域Ａ２を画成する梁５が配設されている。
［中間階］ In the floor area A1, small beams are appropriately installed between the beams 5 laid in parallel, and a floor board B made of an ALC (lightweight cellular concrete) panel is laid on the beams 5 and on the small beams. Thus, the second floor F2 is formed. On the other hand, the floor board B is not laid in the floorless area A2, and a floor opening S is formed. The floorless area A2 includes a beam 5 constructed on the first core L1 between the pillars 4A and 4B, and a beam 5 constructed on the first core L2 between the pillars 4C and 4D. A beam 5 erected on the second core L3 between the columns 4A and 4D, and a beam 5 erected on the second core L4 between the columns 4B and 4C; It is defined by. That is, the beams 5 that define the floorless area A2 are arranged around the four floors of the floorless area A2.
[Middle floor]

図２、図３、及び図４に示されるように、中間階床Ｆ３はこの無床領域Ａ２内の一部領域に形成され、中間階床Ｆ３の上方が天井高の高い中間階空間Ｓ１、中間階床Ｆ３の下方が天井高の低い低天井空間Ｓ４となっている。床開口部Ｓ（無床領域Ａ２）のうち、中間階床Ｆ３以外の領域の一部には、下側階段２と上側階段３とからなる階段ユニットが設置されて、階段室Ｓ３が形成され、その他の領域は吹き抜け部Ｓ２となっている。中間階床Ｆ３は、２階床Ｆ２と同様、ＡＬＣからなる床板（床材）Ｂで形成されている。床板Ｂは、無床領域Ａ２内部において、平面視で無床領域Ａ２を画成する梁５に沿うと共に、無床領域Ａ２を画成する梁５よりも低く且つ基礎梁（１階梁）３７よりも高い位置に設けられた一対の第１中間梁７Ａ，７Ｂ及び一対の第２中間梁８Ａ，８Ｂ、そして第１中間梁７Ａ，７Ｂ間に架設された第３中間梁１０にて支持されている。ここで、「梁５に沿って配置された」とは、当該梁５と離れた位置であって当該梁５の延在方向と同じ方向に延びて配置されている場合を含むものとする。   As shown in FIGS. 2, 3, and 4, the intermediate floor F3 is formed in a partial area in the floorless area A2, and the intermediate floor space S1 having a high ceiling height above the intermediate floor F3, Below the intermediate floor F3 is a low ceiling space S4 with a low ceiling height. Of the floor opening S (no floor area A2), a part of the area other than the intermediate floor F3 is provided with a stair unit composed of the lower staircase 2 and the upper staircase 3 to form a staircase room S3. The other region is a blow-through portion S2. The intermediate floor F3 is formed of a floor board (floor material) B made of ALC, like the second floor F2. The floor board B extends along the beam 5 that defines the floorless region A2 in a plan view inside the floorless region A2, and is lower than the beam 5 that defines the floorless region A2 and is the foundation beam (first floor beam) 37. Supported by a pair of first intermediate beams 7A and 7B and a pair of second intermediate beams 8A and 8B, and a third intermediate beam 10 installed between the first intermediate beams 7A and 7B. ing. Here, “arranged along the beam 5” includes a case where the beam 5 is arranged away from the beam 5 and extends in the same direction as the extending direction of the beam 5.

第１中間梁７Ａ，７Ｂ及び第２中間梁８Ａ，８Ｂは、その端部において互いに接合されて矩形額状の中間階床梁フレーム９が形成される。   The first intermediate beams 7A and 7B and the second intermediate beams 8A and 8B are joined to each other at their ends to form a rectangular frame-shaped intermediate floor beam frame 9.

図７は、第１中間梁７Ａの構成を示す図である。図７に示されるように、第１中間梁７Ａは、上下一対のフランジ７１Ａ，７１Ｂと、一対のフランジ７１Ａ，７１Ｂを接合するウェブ７２とからなるＨ形鋼で構成された長尺状の部材であり、その横断面は開断面である。ウェブ７２には、４つのボルト挿通孔７２ａからなり間柱等の他の部材が接合される接合部７３が第１中間梁７Ａの全長にわたって、平面モジュール（Ｍ）に対応した間隔（両端においては平面モジュール（Ｍ）の２分の１の間隔、その他中間部は平面モジュール（Ｍ）に等しい間隔）で設けられている。   FIG. 7 is a diagram showing a configuration of the first intermediate beam 7A. As shown in FIG. 7, the first intermediate beam 7 </ b> A is a long member composed of an H-shaped steel including a pair of upper and lower flanges 71 </ b> A and 71 </ b> B and a web 72 that joins the pair of flanges 71 </ b> A and 71 </ b> B. The cross section is an open section. The web 72 has a joint 73 formed of four bolt insertion holes 72a to which other members such as a stud are joined over the entire length of the first intermediate beam 7A. The module (M) is provided at a half interval, and the other intermediate part is provided at an interval equal to the planar module (M).

本実施の形態では、第１中間梁７Ａの最端の接合部７３に、それぞれ第２中間梁８Ａ，８Ｂがボルト締結され、その隣の接合部７３に間柱１１Ａ，１１Ｂがボルト締結される。なお、ウェブ７２には、接合部７３の他に、配線の挿通等に利用される開口７２ｂが適宜に形成されている。第１中間梁７Ｂの各部材の構成は、図７に示される第１中間梁７Ａの構成と同一である。本実施の形態では、第１中間梁７Ｂは、最端の接合部７３が、それぞれ第２中間梁８Ａ，８Ｂにボルト締結されることで、第２中間梁８Ａ，８Ｂで支持されている。   In the present embodiment, the second intermediate beams 8A and 8B are bolted to the outermost joint 73 of the first intermediate beam 7A, respectively, and the studs 11A and 11B are bolted to the adjacent joint 73. In addition to the joint portion 73, the web 72 is appropriately formed with an opening 72b used for wiring insertion or the like. The configuration of each member of the first intermediate beam 7B is the same as the configuration of the first intermediate beam 7A shown in FIG. In the present embodiment, the first intermediate beam 7B is supported by the second intermediate beams 8A and 8B by fastening the outermost joint 73 to the second intermediate beams 8A and 8B, respectively.

間柱１１Ａ，１１Ｂが接合される接合部７３，７３で挟まれた部分が一般部７４である。間柱１１Ａ，１１Ｂが接合される接合部７３の領域内で最も断面性能が小さくなる断面位置は、ボルト挿通孔７２ａの中心を切断する位置（図７（ｂ）参照）である。一方、一般部７４、つまり、間柱１１Ａ，１１Ｂが接合される左右の接合部７３，７３で挟まれる部分のうち、断面性能が最も小さい断面位置は、開口７２ｂの中心を切断する位置（図７（ｃ）参照）である。したがって、間柱１１Ａ，１１Ｂに実際に接合された接合部７３は、少なくとも一般部７４のなかで断面性能が最も小さい部分以上の断面性能を有する。ここで仮に、開口７２ｂが形成されていない場合には、一般部７４のなかで断面性能が最も小さい断面位置は、間柱１１Ａ，１１Ｂが接合されない接合部７３においてボルト挿通孔７２ａの中心を切断する位置であり、これは、間柱１１Ａ，１１Ｂが接合される接合部７３領域内での最小の断面性能と同等である。したがって、間柱１１Ａ，１１Ｂに実際に接合された接合部７３の強度が、他の一般部７４に比べて局所的に低下することは無く、中間梁の強度面での性能が一定以上に確保されている。   A portion sandwiched between the joint portions 73 and 73 to which the studs 11A and 11B are joined is a general portion 74. The cross-sectional position where the cross-sectional performance becomes the smallest within the region of the joint 73 where the studs 11A and 11B are joined is the position where the center of the bolt insertion hole 72a is cut (see FIG. 7B). On the other hand, among the portions sandwiched between the general portion 74, that is, the left and right joint portions 73 and 73 to which the studs 11A and 11B are joined, the cross-sectional position having the smallest cross-sectional performance is a position that cuts the center of the opening 72b (FIG. (See (c)). Therefore, the joint part 73 actually joined to the studs 11 </ b> A and 11 </ b> B has a cross-sectional performance at least equal to or smaller than the part having the smallest cross-sectional performance in the general part 74. Here, if the opening 72b is not formed, the cross-sectional position having the smallest cross-sectional performance in the general portion 74 cuts the center of the bolt insertion hole 72a at the joint 73 where the studs 11A and 11B are not joined. This is equivalent to the minimum cross-sectional performance in the joint 73 region where the studs 11A and 11B are joined. Therefore, the strength of the joint portion 73 actually joined to the studs 11A and 11B does not decrease locally as compared with the other general portions 74, and the performance in terms of the strength of the intermediate beam is ensured to a certain level or more. ing.

間柱１１Ａ，１１Ｂ，１１Ｃ，１１Ｄは、中間梁を支持する支持手段である。図２に示されるように、一対の間柱１１Ａ，１１Ｂは、第１の通芯Ｌ１上の基礎梁（１階梁）３７の上に立設されるとともに上端が梁（２階梁）５に接合されており、第１中間梁７Ａをその両端寄りの位置で支持している。間柱１１Ｃは、第２の通芯Ｌ３上の基礎梁（１階梁）３７の上に立設されるとともに上端が梁（２階梁）５に接合されており、第２中間梁８Ａをその一端寄りの位置で支持している。同様に、間柱１１Ｄは、第２の通芯Ｌ４上の基礎梁（１階梁）３７の上に立設されるとともに上端が梁（２階梁）５に接合されており、第２中間梁８Ｂをその一端寄りの位置で支持している。   The studs 11A, 11B, 11C, and 11D are support means for supporting the intermediate beam. As shown in FIG. 2, the pair of studs 11 </ b> A and 11 </ b> B is erected on the foundation beam (first floor beam) 37 on the first core L <b> 1 and the upper end is the beam (second floor beam) 5. The first intermediate beam 7A is supported at positions near both ends thereof. The stud 11C is erected on the foundation beam (first-floor beam) 37 on the second core L3, and the upper end is joined to the beam (second-floor beam) 5. The second intermediate beam 8A is It is supported at a position near one end. Similarly, the stud 11D is erected on the foundation beam (first-floor beam) 37 on the second core L4, and the upper end is joined to the beam (second-floor beam) 5. The second intermediate beam 8B is supported at a position near one end thereof.

間柱１１Ａ〜１１Ｄの構成について、図４、及び図５を用いて、間柱１１Ａを例に挙げて説明する。図４は、柱４Ａ、梁５、間柱１１Ａ、第１中間梁７Ａ、及び第２中間梁８Ａの接合を示す斜視図である。図４、及び図５に示されるように、間柱１１Ａは、下端部（後述の梁接合部１１４の下端部１１４ａ）が基礎梁（１階梁）３７に接合され、上端部（後述の梁接合部１１３の上端部１１３ａ）が梁（２階梁）５に接合される本体部１１１と、本体部１１１の中途部から持ち出されて第１中間梁７Ａの側面に接合されるブラケット部１１５と、を備えている。   The configuration of the studs 11A to 11D will be described using the stud 11A as an example with reference to FIGS. 4 and 5. FIG. 4 is a perspective view showing the joining of the column 4A, the beam 5, the intermediary column 11A, the first intermediate beam 7A, and the second intermediate beam 8A. As shown in FIGS. 4 and 5, the stud 11 </ b> A has a lower end (a lower end 114 a of a beam joint 114 described later) joined to a foundation beam (first floor beam) 37 and an upper end (a beam joint described later). A main body part 111 where the upper end part 113a) of the part 113 is joined to the beam (second floor beam) 5, a bracket part 115 taken out from the middle part of the main body part 111 and joined to the side surface of the first intermediate beam 7A, It has.

本体部１１１は、矩形の鋼管部１１２と、鋼管部１１２の上下両端のそれぞれに設けられた梁接合部１１３，１１４とを有する。梁接合部１１３は、その上端部１１３ａにおいて梁５に接合される部材であり、梁接合部１１４は、その下端部１１４ａにおいて基礎梁３７に接合される部材である。梁接合部１１３は、平面モジュール（Ｍ）に対応した間隔で複数のボルト孔が穿設された梁５の下フランジ５Ａに当接され、ボルト締結され、梁接合部１１４は、基礎梁３７から突設されたアンカーボルトにて締結される。柱４Ａ〜４Ｄも矩形鋼管からなる本体部を備えているが、間柱１１Ａの本体部１１１は、柱４Ａ〜４Ｄの本体部に比べて肉厚であり、曲げ剛性が高くなっている。また、間柱１１Ａの本体部１１１の横断面の外形は、柱４Ａ〜４Ｄの本体部の横断面の外形と同一である。   The main body 111 has a rectangular steel pipe portion 112 and beam joint portions 113 and 114 provided at both upper and lower ends of the steel pipe portion 112. The beam joint portion 113 is a member joined to the beam 5 at its upper end portion 113a, and the beam joint portion 114 is a member joined to the foundation beam 37 at its lower end portion 114a. The beam joint 113 is brought into contact with the lower flange 5A of the beam 5 in which a plurality of bolt holes are formed at intervals corresponding to the planar module (M), and is fastened with bolts. Fastened with protruding anchor bolts. The columns 4A to 4D also include a main body portion made of a rectangular steel pipe. However, the main body portion 111 of the inter-column 11A is thicker than the main body portions of the columns 4A to 4D and has higher bending rigidity. Moreover, the external shape of the cross section of the main-body part 111 of the stud 11A is the same as the external shape of the cross-section of the main-body part of the pillars 4A-4D.

ブラケット部１１５は、断面コ字状で、両端部が本体部１１１の鋼管部１１２に溶接されている。ブラケット部１１５は、鋼管部１１２から持ち出された上下の水平面部１１６Ａ，１１６Ｂと、水平面部１１６Ａ，１１６Ｂの先端同士を連結し、第１中間梁７Ａの接合部７３（ウェブ７２）に面接触してボルト締結される鉛直面部１１７とを備えている。なお、水平面部１１６Ａ，１１６Ｂ及び鉛直面部１１７の内側には、板状の補強材であるリブ１１８が設けられている。   The bracket portion 115 has a U-shaped cross section, and both end portions are welded to the steel pipe portion 112 of the main body portion 111. The bracket portion 115 connects the upper and lower horizontal plane portions 116A and 116B taken out from the steel pipe portion 112 and the tips of the horizontal plane portions 116A and 116B, and makes surface contact with the joint portion 73 (web 72) of the first intermediate beam 7A. And a vertical surface portion 117 to be bolted. Note that ribs 118, which are plate-shaped reinforcing materials, are provided inside the horizontal surface portions 116A and 116B and the vertical surface portion 117.

図６に示されるように、水平面部１１６Ｂの先端の幅は鉛直面部１１７の幅に対応しており、根元の幅に比べて途中から拡大している。水平面部１１６Ａについても同様である。また、鉛直面部１１７の高さ寸法は、第１中間梁７Ａのウェブ７２の高さ寸法に比べて小さくなっている。ここで、鉛直面部１１７の高さ寸法、つまりブラケット部１１５の高さ寸法とは、鋼管部１１２から水平方向に持ち出されたブラケット部１１５の下端（水平面部１１６Ｂの下面）から上端（水平面部１１６Ａの上面）までの寸法を意味する。そして、第１中間梁７Ａのウェブ７２の高さ寸法、つまり、第１中間梁７Ａの高さ寸法は、下方のフランジ７１Ｂの上面から上方のフランジ７１Ａの下面までの寸法を意味する。   As shown in FIG. 6, the width of the tip of the horizontal surface portion 116 </ b> B corresponds to the width of the vertical surface portion 117 and is enlarged from the middle compared to the width of the root. The same applies to the horizontal plane portion 116A. Further, the height dimension of the vertical surface portion 117 is smaller than the height dimension of the web 72 of the first intermediate beam 7A. Here, the height dimension of the vertical surface portion 117, that is, the height dimension of the bracket portion 115 is the lower end (the lower surface of the horizontal surface portion 116 </ b> B) of the bracket portion 115 taken out from the steel pipe portion 112 in the horizontal direction. The upper surface). The height dimension of the web 72 of the first intermediate beam 7A, that is, the height dimension of the first intermediate beam 7A means a dimension from the upper surface of the lower flange 71B to the lower surface of the upper flange 71A.

第１中間梁７Ａの左右両方の接合部７３，７３は、一対の間柱１１Ａ，１１Ｂの各ブラケット部１１５の鉛直面部１１７にボルト締結されており、その結果として、第１中間梁７Ａの両端部が間柱１１Ａ，１１Ｂにそれぞれ支持されている。一方、他方の第１中間梁７Ｂは、間柱１１Ａ〜１１Ｄでは支持されず、一対の第２中間梁８Ａ，８Ｂによって支持されている。   Both left and right joint portions 73, 73 of the first intermediate beam 7A are bolted to the vertical surface portions 117 of the bracket portions 115 of the pair of intermediate columns 11A, 11B. As a result, both end portions of the first intermediate beam 7A Are supported by the studs 11A and 11B, respectively. On the other hand, the other first intermediate beam 7B is not supported by the studs 11A to 11D, but is supported by a pair of second intermediate beams 8A and 8B.

図８は、第２中間梁８Ａの構成を示す図である。図８に示されるように、第２中間梁８Ａは、横断面が開断面の鋼材からなる長尺状の本体部８１と、本体部８１の両端に設けられ、第１中間梁７Ａ，７Ｂに接続される接合部８５，８５とを備えている。第２中間梁８Ｂの構成は、第２中間梁８Ａと同様であるため、以下、第２中間梁８Ａについて説明し、第２中間梁８Ｂの詳細な説明を省略する。本体部８１は、上下一対のフランジ８２Ａ，８２Ｂをウェブ８３で接合して形成されるＨ形鋼からなる。本体部８１の形状は、断面寸法も含め、基本的に第１中間梁７Ａ，７Ｂと同様であるが、４つのボルト挿通孔８３ａからなる接合部８４は、両端部の４つについてはその間隔が平面モジュール（Ｍ）の２分の１となるように、その他の中間部については平面モジュール（Ｍ）に等しくなるように設けられている。また、配線の挿通等に用いられる開口８３ｂが適宜に形成されている。   FIG. 8 is a diagram showing a configuration of the second intermediate beam 8A. As shown in FIG. 8, the second intermediate beam 8A is provided with a long main body 81 made of a steel material having an open cross section, and both ends of the main body 81, and is attached to the first intermediate beams 7A and 7B. It is provided with joints 85 and 85 to be connected. Since the configuration of the second intermediate beam 8B is the same as that of the second intermediate beam 8A, the second intermediate beam 8A will be described below, and the detailed description of the second intermediate beam 8B will be omitted. The main body 81 is made of an H-section steel formed by joining a pair of upper and lower flanges 82A and 82B with a web 83. The shape of the main body 81 is basically the same as that of the first intermediate beams 7A and 7B, including the cross-sectional dimensions. However, the joint 84 formed by the four bolt insertion holes 83a has a distance between the four ends. The other intermediate portion is provided so as to be equal to the planar module (M) so that is half of the planar module (M). In addition, an opening 83b used for wiring insertion or the like is appropriately formed.

図９に示されるように、本体部８１の端部には、ウェブ８３の中央部分が上下のフランジ８２Ａ，８２Ｂよりも突き出た突出片８３ｃが形成されており、突出片８３ｃには、第１中間梁７Ａ，７Ｂに接合される接合部８５が溶接されている。接合部８５は、突出片８３ｃの先端、及び上下を囲むような断面コ字状であり、第１中間梁７Ａ，７Ｂのウェブ７２に面接触してボルト締結される当接板部８６と、当接板部８６の上下端で屈曲して突出片８３ｃの上端及び下端に溶接される結合板部８７Ａ，８７Ｂとを備えている。図１０に示されるように、上下一対の結合板部８７Ａ，８７Ｂは、くさび状であり、くさびの先にスリット８７ａが形成されている。接合部８５は、このスリット８７ａに突出片８３ｃが差し込まれるように装着され、且つ溶接される。   As shown in FIG. 9, at the end of the main body 81, a protruding piece 83c is formed in which the central portion of the web 83 protrudes from the upper and lower flanges 82A and 82B. The protruding piece 83c includes a first piece 83c. A joint 85 joined to the intermediate beams 7A and 7B is welded. The joining portion 85 has a U-shaped cross section surrounding the tip of the protruding piece 83c and the top and bottom, and a contact plate portion 86 that is in surface contact with the web 72 of the first intermediate beam 7A, 7B and is bolted, There are coupling plate portions 87A and 87B which are bent at the upper and lower ends of the contact plate portion 86 and are welded to the upper and lower ends of the protruding piece 83c. As shown in FIG. 10, the pair of upper and lower coupling plate portions 87A and 87B are wedge-shaped, and a slit 87a is formed at the tip of the wedge. The joint portion 85 is mounted and welded so that the protruding piece 83c is inserted into the slit 87a.

接合部８５の高さ、つまり、結合板部８７Ｂの下端から結合板部８７Ａの上端までの寸法は、第１中間梁７Ａ，７Ｂの上下のフランジ７１Ａ，７１Ｂ間の寸法よりも小さくなっている。その結果、接合部８５は、第１中間梁７Ａ，７Ｂの上下のフランジ７１Ａ，７１Ｂ間に収まり、第１中間梁７Ａ，７Ｂのウェブ７２に到達してボルト締結される。   The height of the joint portion 85, that is, the dimension from the lower end of the coupling plate portion 87B to the upper end of the coupling plate portion 87A is smaller than the dimension between the upper and lower flanges 71A and 71B of the first intermediate beams 7A and 7B. . As a result, the joint portion 85 fits between the upper and lower flanges 71A and 71B of the first intermediate beams 7A and 7B, reaches the web 72 of the first intermediate beams 7A and 7B, and is bolted.

図４、及び図８に示されるように、第２中間梁８Ａ，８Ｂは、第１中間梁７Ｂに接合される側の端に最も近い接合部８４が、間柱１１Ｃ，１１Ｄ（図２参照）にそれぞれ接合されて一端が支持されている。また、他端については、第１中間梁７Ａに接合されることで支持されている。第２中間梁８Ａと間柱１１Ｃとの接合構成、及び第２中間梁８Ｂと間柱１１Ｄとの接合構成は、いずれも上述した第１中間梁７Ａと間柱１１Ａ，１１Ｂとの接合構成と同様である。第３中間梁１０は、第１中間梁７Ａ，７Ｂ、及び第２中間梁８Ａ，８Ｂと同一の断面寸法を有するＨ形鋼からなり、両端部には、第２中間梁８Ａ，８Ｂの接合部８４と同一形状の接合部を備えている。そしてこの接合部が第２中間梁８Ａ，８Ｂの中間位置の接合部８４に当接されボルト締結されることで架設されている。   As shown in FIG. 4 and FIG. 8, the second intermediate beams 8A and 8B have a joint portion 84 that is closest to the end of the second intermediate beam 8A and 8B that is joined to the first intermediate beam 7B (see FIG. 2). Are joined to each other and supported at one end. The other end is supported by being joined to the first intermediate beam 7A. The joining configuration of the second intermediate beam 8A and the intermediate post 11C and the joining configuration of the second intermediate beam 8B and the intermediate post 11D are both the same as the joint configuration of the first intermediate beam 7A and the intermediate posts 11A and 11B described above. . The third intermediate beam 10 is made of H-shaped steel having the same cross-sectional dimension as the first intermediate beams 7A and 7B and the second intermediate beams 8A and 8B, and the second intermediate beams 8A and 8B are joined to both ends. A joint portion having the same shape as the portion 84 is provided. And this junction part is constructed by contact | abutting to the junction part 84 of the intermediate position of 2nd intermediate beam 8A, 8B, and bolt fastening.

図２及び図１１に示されるように、第１中間梁７Ａ，７Ｂ、第２中間梁８Ａ，８Ｂ、及び第３中間梁１０の上に床板Ｂが敷設されて中間階床Ｆ３が形成されている。第２中間梁８Ａの上フランジ８２Ａの床板載置されない側の上面には、断面Ｌ字状の長尺部材であるモルタル受け２２が第２中間梁８Ａの長手方向に沿って固定されており、床板Ｂの端縁とモルタル受け２２との間にはモルタル２３が充填されている。床板Ｂ上には、遮音マット２４、石膏ボード２５、バーチクルボード２６、及び寄木合板２７がこの順に設置されて床仕上層２８が形成されている。第２中間梁８Ａの下側のフランジ８２Ｂの下面には、ブラケット２９を介して野縁３０が固定されており、野縁３０の下面には、石膏ボード等の天井材３１が貼置されて天井３２が形成されている。   As shown in FIGS. 2 and 11, a floor board B is laid on the first intermediate beams 7A and 7B, the second intermediate beams 8A and 8B, and the third intermediate beam 10 to form an intermediate floor F3. Yes. On the upper surface of the upper flange 82A of the second intermediate beam 8A on the side where the floor plate is not placed, a mortar receiver 22 that is a long member having an L-shaped cross section is fixed along the longitudinal direction of the second intermediate beam 8A. A mortar 23 is filled between the edge of the floor board B and the mortar receptacle 22. On the floor board B, a sound insulation mat 24, a gypsum board 25, a vertical board 26, and a parquet plywood 27 are installed in this order to form a floor finishing layer 28. A field edge 30 is fixed to the lower surface of the lower flange 82B of the second intermediate beam 8A via a bracket 29, and a ceiling material 31 such as a plaster board is attached to the lower surface of the field edge 30. A ceiling 32 is formed.

図２における梁５は、建物の外周部に配置されたものあり、外周壁３８に接している。外周壁３８は、梁５の建物外部側に沿って、１階から２階にかけて連続的に立設された外壁材３６と、石膏ボート等からなり表面にビニールクロス等で仕上げが施された内装壁材３４Ａ（中間階空間Ｓ１の内装壁材），３４Ｂ（低天井空間Ｓ４の内装壁材）を有している。外壁材３６と内装壁材３４Ａ，３４Ｂとの間には、壁体内空間Ｓ６が確保されている。板状の発泡樹脂からなる断熱材３５が、この壁体内空間Ｓ６を利用して、外壁材３６の内面に沿って連続的に配設されている。断熱材３５が配設された状態であっても、壁体内空間Ｓ６は中間階床Ｆ３位置で分断されることなく上下方向に連通している。内装壁材３４Ａの下端は、床仕上層２８と接しており、内装壁材３４Ｂの上端は、天井３２と連続している。また、中間階床Ｆ３を構成する床板Ｂは、外壁材３６とは離隔している。天井３２と中間階床Ｆ３との間の天井懐空間Ｓ５は、第２中間梁８Ａの開口８３ｂ及び第２中間梁８Ａの下フランジ８２Ｂと天井３２との間の隙間を介して壁体内空間Ｓ６と連通している。この連通した壁体内空間Ｓ６、天井懐空間Ｓ５を利用して、中間階床Ｆ３方向に配線や配管を容易に挿通することができる。   The beam 5 in FIG. 2 is arranged on the outer peripheral part of the building and is in contact with the outer peripheral wall 38. The outer peripheral wall 38 has an outer wall material 36 that is continuously erected from the first floor to the second floor along the exterior side of the beam 5 and an interior that is made of a plaster boat or the like and is finished with a vinyl cloth or the like on the surface. Wall material 34A (interior wall material of intermediate floor space S1) and 34B (interior wall material of low ceiling space S4) are provided. A wall space S6 is secured between the outer wall member 36 and the interior wall members 34A and 34B. A heat insulating material 35 made of a plate-like foamed resin is continuously disposed along the inner surface of the outer wall member 36 using the wall space S6. Even in the state in which the heat insulating material 35 is disposed, the wall space S6 communicates in the vertical direction without being divided at the position of the intermediate floor F3. The lower end of the interior wall material 34A is in contact with the floor finishing layer 28, and the upper end of the interior wall material 34B is continuous with the ceiling 32. Further, the floor board B constituting the intermediate floor F3 is separated from the outer wall material 36. The ceiling pocket space S5 between the ceiling 32 and the intermediate floor F3 is the wall space S6 through the opening 83b of the second intermediate beam 8A and the gap between the lower flange 82B of the second intermediate beam 8A and the ceiling 32. Communicated with. Using this connected wall space S6 and ceiling pocket space S5, wiring and piping can be easily inserted in the direction of the intermediate floor F3.

次に、建物１における中間階床Ｆ３の形成方法を含む躯体の構築方法について説明する。中間階床Ｆ３を形成する際には、（１）第１の通芯Ｌ１，Ｌ２と第２の通芯Ｌ３，Ｌ４を含む通芯に沿って、基礎梁３７を含む基礎を構築する。（２）基礎梁３７の交点、すなわち第１の通芯Ｌ１，Ｌ２と第２の通芯Ｌ３，Ｌ４との交点を含む所定の通り芯の交点に柱４Ａ〜４Ｄを含む柱を立設する。（３）無床領域Ａ２の周囲であり、第１の通芯Ｌ１上で、且つ柱４Ａ，４Ｂとは異なる位置に二本の間柱１１Ａ，１１Ｂを立設する。間柱１１Ａ，１１Ｂの立設位置は、架設予定の第１中間梁７Ａの接合部７３に対応する位置である。具体的には、第１の通芯Ｌ１上に立設される間柱１１Ａ，１１Ｂの立設位置は、第１中間梁７Ａにおける両端部に対応する位置である。（４）無床領域Ａ２の周囲であり、一対の第２の通芯Ｌ３，Ｌ４上で、且つ柱４Ａ〜４Ｄとは異なる位置に各一本の間柱１１Ｃ，１１Ｄを立設する。具体的には、第２の通芯Ｌ３，Ｌ４上に立設される間柱１１Ｃ，１１Ｄの立設位置は、第２中間梁８Ａ，８Ｂにおける、吹き抜け部Ｓ２及び階段室Ｓ３側の端部に対応する位置である。   Next, a method for constructing a frame including a method for forming the intermediate floor F3 in the building 1 will be described. When forming the intermediate floor F3, (1) a foundation including the foundation beam 37 is constructed along the core including the first cores L1 and L2 and the second cores L3 and L4. (2) A column including columns 4A to 4D is erected at an intersection of the foundation beams 37, that is, a predetermined core intersection including the intersections of the first cores L1 and L2 and the second cores L3 and L4. . (3) Two intermediate columns 11A and 11B are provided upright on the first core L1 and at positions different from the columns 4A and 4B around the floorless area A2. The standing positions of the studs 11A and 11B are positions corresponding to the joint portions 73 of the first intermediate beam 7A to be erected. Specifically, the standing positions of the studs 11A and 11B standing on the first core L1 are positions corresponding to both end portions of the first intermediate beam 7A. (4) One of the pillars 11C and 11D is provided upright on the pair of second cores L3 and L4 and at positions different from the pillars 4A to 4D around the floorless area A2. Specifically, the standing positions of the studs 11C and 11D that are erected on the second cores L3 and L4 are at the end portions of the second intermediate beams 8A and 8B on the side of the blow-through portion S2 and the staircase S3. Corresponding position.

（５）隣り合う柱４Ａ〜４Ｄ間で梁５を架設し、併せて、間柱１１Ａ〜１１Ｄの上端部をボルトによって梁５に締結固定する。（６）第１の通芯Ｌ１上の間柱１１Ａ，１１Ｂに、第１中間梁７Ａを設置する。具体的には、第１中間梁７Ａを持ち上げ、間柱１１Ａ，１１Ｂに設けられたブラケット部１１５に接合部７３を突き当て、ボルトによって締結固定する。   (5) The beam 5 is installed between adjacent columns 4A to 4D, and the upper ends of the columns 11A to 11D are fastened and fixed to the beam 5 with bolts. (6) The first intermediate beam 7A is installed on the pillars 11A and 11B on the first core L1. Specifically, the first intermediate beam 7A is lifted, the joint portion 73 is abutted against the bracket portion 115 provided in the intermediate pillars 11A and 11B, and is fastened and fixed by bolts.

（７）第１中間梁７Ａと一対の第２の通芯Ｌ３，Ｌ４上の間柱１１Ｃ，１１Ｄとの間に、一対の第２中間梁８Ａ，８Ｂを架設する。具体的には、まず、第２中間梁８Ａを持ち上げ、間柱１１Ｃのブラケット部１１５に接合部８４を突き当ててボルトにより締結固定するとともに、第１中間梁７Ａの一方側の端部に第２中間梁８Ａの接合部８５を突き当てボルト締結することにより、第２中間梁８Ａを架設する。同様に、第２中間梁８Ｂを持ち上げ、間柱１１Ｄのブラケット部１１５に接合部８４を突き当ててボルトにより締結固定するとともに、第１中間梁７Ａの他方側の端部に第２中間梁８Ｂの接合部８５を突き当てボルト締結することにより、第２中間梁８Ｂを架設する。   (7) A pair of second intermediate beams 8A and 8B are installed between the first intermediate beam 7A and the pillars 11C and 11D on the pair of second cores L3 and L4. Specifically, first, the second intermediate beam 8A is lifted, the joint portion 84 is abutted against the bracket portion 115 of the intermediate post 11C, and is fastened and fixed by a bolt, and the second intermediate beam 8A is secondly fixed to the one end portion of the first intermediate beam 7A. The second intermediate beam 8A is constructed by abutting and fastening the joining portion 85 of the intermediate beam 8A. Similarly, the second intermediate beam 8B is lifted, the joint portion 84 is abutted against the bracket portion 115 of the intermediate post 11D, and is fastened and fixed by a bolt. The second intermediate beam 8B is fixed to the other end of the first intermediate beam 7A. The second intermediate beam 8B is installed by abutting the joint portion 85 and fastening the bolt.

（８）対向する一対の第２中間梁８Ａ，８Ｂの端部（吹き抜け部Ｓ２及び階段室Ｓ３側の端部）間に第１中間梁７Ｂを架設する。具体的には、第１中間梁７Ｂを持ち上げ、第１中間梁７Ｂの両端部に第２中間梁８Ａ，８Ｂの接合部８５を突き当ててボルト締結することにより、第１中間梁７Ｂを架設する。第１中間梁７Ｂを架設すると、略矩形の中間階床梁フレーム９が形成される。   (8) The first intermediate beam 7B is installed between the ends of the pair of second intermediate beams 8A and 8B facing each other (ends on the side of the blow-through portion S2 and the staircase S3). Specifically, the first intermediate beam 7B is constructed by lifting the first intermediate beam 7B, abutting the joint portions 85 of the second intermediate beams 8A and 8B on both ends of the first intermediate beam 7B, and fastening with bolts. To do. When the first intermediate beam 7B is installed, a substantially rectangular intermediate floor beam frame 9 is formed.

中間階床梁フレーム９には、適宜に床板Ｂを敷設して中間階床Ｆ３を形成する。更に、中間階床Ｆ３の上には床仕上層２８を施し、中間階床Ｆ３の下方に天井３２を施して中間階床Ｆ３を形成する。   An intermediate floor F3 is formed by appropriately laying a floor board B on the intermediate floor beam frame 9. Further, a floor finishing layer 28 is provided on the intermediate floor F3, and a ceiling 32 is provided below the intermediate floor F3 to form the intermediate floor F3.

以上述べた中間階床の支持構造では、中間梁（第１中間梁７Ａ，７Ｂ、又は第２中間梁８Ａ，８Ｂ）は開断面を有している。したがって、中間梁と間柱１１Ａ〜１１Ｄとの接合部（接合部７３、又は接合部８４）に間柱１１Ａ〜１１Ｄを嵌め込むための過度の切欠き等は不要であり、ボルト穴等の必要最小限の加工で足りるので、特に強度面での性能低下の抑制に有効である。更に、接合部（接合部７３、又は接合部８４）に特別な切欠き等は不要であるため、間柱１１Ａ〜１１Ｄとの接合箇所の選択の自由度は高く、また、取り付け作業の自由度も高い。その結果として、この中間階床の支持構造では、中間梁の性能低下を生じさせることなく、取り付け位置及び取り付け作業の自由度を向上させることができる。   In the intermediate floor support structure described above, the intermediate beam (the first intermediate beam 7A, 7B or the second intermediate beam 8A, 8B) has an open cross section. Therefore, an excessive notch or the like for fitting the intermediate pillars 11A to 11D into the joint part (joint part 73 or joint part 84) between the intermediate beam and the intermediate pillars 11A to 11D is unnecessary, and the minimum necessary for bolt holes and the like. Therefore, it is effective for suppressing the deterioration of performance particularly in terms of strength. Furthermore, since a special notch or the like is not required for the joint (joint 73 or joint 84), the degree of freedom of selection of the joint portion with the studs 11A to 11D is high, and the degree of freedom of attachment work is also high. high. As a result, with this intermediate floor support structure, it is possible to improve the attachment position and the degree of freedom of the attachment work without causing a deterioration in the performance of the intermediate beam.

また、間柱１１Ａ，１１Ｂが接合される接合部７３の断面性能は、一般部７４のなかで断面性能が最も小さい部分以上の断面性能を有している。このことで、接合部７３の強度が他の一般部７４に比べて局所的に低下することがなく、中間梁の強度面での性能を一定以上に確保し易い。   Moreover, the cross-sectional performance of the joint part 73 to which the studs 11 </ b> A and 11 </ b> B are joined has a cross-sectional performance that is equal to or greater than the portion of the general part 74 having the smallest cross-sectional performance. Thus, the strength of the joint portion 73 does not decrease locally as compared with the other general portions 74, and the strength of the intermediate beam can be easily secured to a certain level or more.

また、間柱１１Ａ〜１１Ｄのブラケット部１１５が、中間梁の高さ寸法よりも小さい高さ寸法を有するため、ブラケット部１１５を中間梁の側面（ウェブ７２、又はウェブ８３）に接合した場合に、ブラケット部１１５の上端と下端とが、それぞれ中間梁の上方、または下方から突出しない。その結果、中間梁の上方においては、ブラケット部１１５が邪魔にならないので中間階床Ｆ３における敷設が容易となる。また、中間梁の下方では、凹凸がなくかつ高い天井を有する空間を形成することができる。   In addition, since the bracket portion 115 of the studs 11A to 11D has a height dimension smaller than the height dimension of the intermediate beam, when the bracket portion 115 is joined to the side surface (web 72 or web 83) of the intermediate beam, The upper end and the lower end of the bracket part 115 do not protrude from above or below the intermediate beam, respectively. As a result, since the bracket portion 115 does not get in the way above the intermediate beam, laying on the intermediate floor F3 is facilitated. Further, a space having no unevenness and a high ceiling can be formed below the intermediate beam.

また、中間梁は、Ｈ形鋼からなり、ブラケット部１１５は、ウェブに面接触する鉛直面部１１７を有し、鉛直面部１１７がウェブに締結固定されている。したがって、Ｈ形鋼からなる中間梁のウェブにブラケット部１１５を直接接合することになるので、中間梁の支持強度の向上及び部品点数の削減に有効である。   The intermediate beam is made of H-shaped steel, and the bracket portion 115 has a vertical surface portion 117 that comes into surface contact with the web, and the vertical surface portion 117 is fastened and fixed to the web. Therefore, since the bracket portion 115 is directly joined to the web of the intermediate beam made of H-shaped steel, it is effective for improving the support strength of the intermediate beam and reducing the number of parts.

また、建物１の外周壁３８は、外壁材３６と内装壁材３４Ａ，３４Ｂとを有し、外壁材３６と内装壁材３４Ａ，３４Ｂとの間には壁体内空間Ｓ６が形成されており、中間階床Ｆ３の上面に設けられた床仕上層２８は外周壁３８、具体的には内装壁材３４Ａに接しており、中間階床Ｆ３を構成する床板Ｂは、外壁材３６とは離隔しているため、壁体内空間Ｓ６は中間階床Ｆ３の上方と下方とで連通し、配線や配管を上下に通す際に都合がよい。また、壁体内空間Ｓ６に断熱材３５を配設する際に中間階床Ｆ３の位置で断熱材を分断する必要がない。   The outer peripheral wall 38 of the building 1 includes an outer wall material 36 and interior wall materials 34A and 34B, and a wall space S6 is formed between the outer wall material 36 and the interior wall materials 34A and 34B. The floor finishing layer 28 provided on the upper surface of the intermediate floor F3 is in contact with the outer peripheral wall 38, specifically, the interior wall material 34A, and the floor board B constituting the intermediate floor F3 is separated from the outer wall material 36. Therefore, the wall space S6 communicates between the upper and lower sides of the intermediate floor F3, which is convenient when passing wiring and piping up and down. Further, when the heat insulating material 35 is disposed in the wall space S6, it is not necessary to divide the heat insulating material at the position of the intermediate floor F3.

以上、本発明をその実施形態に基づいて詳細に説明した。しかし、本発明は上記実施形態に限定されるものではない。例えば、本実施形態では、中間梁の支持手段として、下端部及び上端部の両方において梁（梁５、基礎梁３７）に固定される間柱１１Ａ〜１１Ｄについて説明したが、支持手段としては、上下階の梁のうち一方に固定される柱部材等であってもよい。また、間柱の設置位置や本数についても、本実施形態の態様に限定されず、中間階床梁フレーム９を構造上より安全に支持することができるように３本の間柱で中間梁を支持するようにしてもよい。   The present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above embodiment. For example, in the present embodiment, the intermediate pillars 11A to 11D that are fixed to the beams (the beam 5 and the foundation beam 37) at both the lower end and the upper end are described as the intermediate beam support means. A pillar member fixed to one of the beams on the floor may be used. Further, the installation positions and the number of the studs are not limited to the form of the present embodiment, and the intermediate beams are supported by the three studs so that the intermediate floor beam frame 9 can be supported more safely from the structure. You may do it.

また、無床領域Ａ２や中間階床Ｆ３の大きさや縦横の比率なども本実施形態で示したものに限らず、例えば、無床領域Ａ２すべてに中間階床Ｆ３が形成されてもよい。また、第３中間梁１０の数や架設方向も本実施形態の態様に限定されず、例えば、第１中間梁７Ａ，７Ｂや第２中間梁８Ａ，８Ｂの長さ、使用する床板Ｂの寸法、構造安全性等に応じて、第３中間梁を複数設けてもよいし、第３中間梁を全く設けないようにしてもよい。また、第３中間梁を第１中間梁７Ａ，７Ｂで支持するように架設してもよい。   Further, the size and aspect ratio of the floorless area A2 and the intermediate floor F3 are not limited to those shown in the present embodiment. For example, the intermediate floor F3 may be formed in the entire floorless area A2. Further, the number of the third intermediate beams 10 and the installation direction are not limited to those of the present embodiment. For example, the lengths of the first intermediate beams 7A and 7B and the second intermediate beams 8A and 8B and the dimensions of the floor plate B to be used. Depending on the structural safety and the like, a plurality of third intermediate beams may be provided, or no third intermediate beam may be provided. Further, the third intermediate beam may be installed so as to be supported by the first intermediate beams 7A and 7B.

１…建物、４Ａ，４Ｂ，４Ｃ，４Ｄ…柱、５…梁、７Ａ，７Ｂ…第１中間梁、８Ａ，８Ｂ…第２中間梁、９…中間階床梁フレーム、１１Ａ，１１Ｂ，１１Ｃ，１１Ｄ…間柱（支持手段）、２８…床仕上層、３２…天井、３４Ａ，３４Ｂ…内装壁材、３６…外壁材、３７…基礎梁、３８…外周壁、７１Ａ，７１Ｂ，８２Ａ，８２Ｂ…フランジ、７２，８３…ウェブ、７３，８４，８５…接合部、７４…一般部、１１１…本体部、１１５…ブラケット部、１１７…鉛直面部、Ａ１…有床領域、Ａ２…無床領域、Ｂ…床板、Ｆ３…中間階床、Ｌ１，Ｌ２…第１の通芯、Ｌ３，Ｌ４…第２の通芯、Ｓ…床開口部、Ｓ１…中間階空間、Ｓ５…天井懐空間、Ｓ６…壁体内空間。   DESCRIPTION OF SYMBOLS 1 ... Building, 4A, 4B, 4C, 4D ... Column, 5 ... Beam, 7A, 7B ... 1st intermediate beam, 8A, 8B ... 2nd intermediate beam, 9 ... Middle floor floor beam frame, 11A, 11B, 11C, 11D: studs (support means), 28: floor finishing layer, 32: ceiling, 34A, 34B ... interior wall material, 36 ... outer wall material, 37 ... foundation beam, 38 ... outer peripheral wall, 71A, 71B, 82A, 82B ... flange , 72, 83 ... web, 73, 84, 85 ... joint part, 74 ... general part, 111 ... main body part, 115 ... bracket part, 117 ... vertical surface part, A1 ... floor area, A2 ... floorless area, B ... Floor board, F3 ... middle floor, L1, L2 ... first core, L3, L4 ... second core, S ... floor opening, S1 ... intermediate floor space, S5 ... ceiling pocket, S6 ... inside wall space.

Claims (5)

互いに平行な複数の第１の通芯と、互いに平行であって且つ該第１の通芯に直交する複数の第２の通芯との交点に立設される柱と、隣り合う前記柱間に配設される梁と、前記梁に支持される床と、を備えた複数階建て建物における、中間階床の支持構造であって、
１階及び屋上階を除く所定の階において、床が敷設された有床領域と、床が敷設されない矩形状の無床領域とが形成されており、
前記無床領域の四周には、前記無床領域を画成する前記梁が配設されており、
前記無床領域の内部において、平面視で、前記無床領域を画成する前記梁に沿うと共に、前記無床領域を画成する前記梁よりも低く且つ下階の梁よりも高い位置に、中間梁が設けられ、当該中間梁にて前記中間階床を構成する床材が支持されており、
前記中間梁を支持する支持手段は、前記無床領域を画成する前記梁もしくはその直下の下階の梁の少なくとも一方に固定されており、
前記中間梁は、開断面を有して長尺状に形成されると共に、前記支持手段に接合される接合部を備えていることを特徴とする中間階床の支持構造。 A plurality of first cores that are parallel to each other and a column that is erected at the intersection of a plurality of second cores that are parallel to each other and perpendicular to the first core, and between the adjacent columns A support structure for an intermediate floor in a multi-storey building comprising a beam disposed on the floor and a floor supported by the beam,
On a predetermined floor excluding the first floor and the rooftop floor, a floor area where the floor is laid and a rectangular floor area where the floor is not laid are formed,
The beam defining the floorless area is arranged on the four circumferences of the floorless area,
In the inside of the floorless region, in plan view, along the beam defining the floorless region, at a position lower than the beam defining the floorless region and higher than the beam on the lower floor, An intermediate beam is provided, and the floor material constituting the intermediate floor is supported by the intermediate beam.
The support means for supporting the intermediate beam is fixed to at least one of the beam that defines the floorless region or a beam on the lower floor immediately below the beam.
The intermediate beam support structure according to claim 1, wherein the intermediate beam is formed in an elongated shape having an open cross section and has a joint portion joined to the support means. 前記中間梁における前記接合部の断面性能は、前記接合部以外の一般部のうち、断面性能が最も小さい部分の断面性能と同等以上であることを特徴とする請求項１記載の中間階床の支持構造。   2. The intermediate floor according to claim 1, wherein a cross-sectional performance of the joint portion in the intermediate beam is equal to or higher than a cross-sectional performance of a portion having the smallest cross-sectional performance among general portions other than the joint portion. Support structure. 前記支持手段は、前記無床領域を画成する前記梁の下方に立設される間柱であり、
前記間柱は、本体部と、該本体部の中途から持ち出されたブラケット部と、を有し、
前記ブラケット部は、前記中間梁の高さ寸法よりも小さい高さ寸法を有し、前記中間梁の側面に接合されていることを特徴とする請求項１または２記載の中間階床の支持構造。 The support means is a stud erected below the beam that defines the floorless region,
The stud has a main body portion and a bracket portion taken out from the middle of the main body portion,
The support structure for an intermediate floor according to claim 1 or 2, wherein the bracket portion has a height dimension smaller than a height dimension of the intermediate beam, and is joined to a side surface of the intermediate beam. . 前記中間梁は、Ｈ形鋼からなり、
前記ブラケット部は、前記中間梁のウェブに面接触する鉛直面部を有し、該鉛直面部が前記ウェブに締結固定されていることを特徴とする請求項３に記載の中間階床の支持構造。 The intermediate beam is made of H-section steel,
The support structure for an intermediate floor according to claim 3, wherein the bracket portion has a vertical surface portion that comes into surface contact with the web of the intermediate beam, and the vertical surface portion is fastened and fixed to the web. 前記建物の外周壁は、外壁材と内装壁材とを有し、
前記外壁材と内装壁材との間には壁体内空間が形成されており、
前記中間階床の上面に設けられた床仕上層は、前記外周壁に接しており、
前記中間階床を構成する床材は、前記外壁材とは離隔していることを特徴とする請求項１〜４のいずれか一項に記載の中間階床の支持構造。 The outer peripheral wall of the building has an outer wall material and an interior wall material,
A wall space is formed between the outer wall material and the interior wall material,
The floor finishing layer provided on the upper surface of the intermediate floor is in contact with the outer peripheral wall,
The floor structure which comprises the said intermediate floor is separated from the said outer wall material, The support structure of the intermediate floor as described in any one of Claims 1-4 characterized by the above-mentioned.

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