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JP7068143B2 - building - Google Patents

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JP7068143B2
JP7068143B2 JP2018212948A JP2018212948A JP7068143B2 JP 7068143 B2 JP7068143 B2 JP 7068143B2 JP 2018212948 A JP2018212948 A JP 2018212948A JP 2018212948 A JP2018212948 A JP 2018212948A JP 7068143 B2 JP7068143 B2 JP 7068143B2
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building
corner cutting
peripheral frame
cutting portion
section
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JP2020079514A (en
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耕次 眞鍋
正人 渡辺
裕介 山谷
俊介 鈴木
元優 渡邊
稔 小田
真豊 松崎
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Sumitomo Mitsui Construction Co Ltd
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Sumitomo Mitsui Construction Co Ltd
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Description

本発明は建物に関し、特に中高層塔状集合住宅の構造に関する。 The present invention relates to a building, and particularly to a structure of a middle-high-rise tower-shaped apartment building.

内側チューブと外側チューブとを備えたダブルチューブ型の高層集合住宅が知られている。特許文献1には、水平断面において概ね矩形の内側チューブと概ね矩形の外側チューブとを備え、内側チューブと外側チューブの隅部が隅切りされた建物が開示されている。内側チューブはコアウォールを有し、外側チューブは所定の間隔で設置された柱を有し、複数の床スラブがコアウォールと柱との間に放射状に設けられている。このような構成により、コアウォールから放射状に梁を設置する必要がなく、広くて解放感のある居住空間を確保することができる。 A double-tube type high-rise apartment building with an inner tube and an outer tube is known. Patent Document 1 discloses a building having a substantially rectangular inner tube and a substantially rectangular outer tube in a horizontal cross section, and the corners of the inner tube and the outer tube are cut off. The inner tube has a core wall, the outer tube has columns installed at predetermined intervals, and a plurality of floor slabs are provided radially between the core wall and the columns. With such a configuration, it is not necessary to install beams radially from the core wall, and it is possible to secure a large and open living space.

特許第5297028号公報Japanese Patent No. 5297028

特許文献1に開示された建物は隅部が隅切りされているため、床スラブをPCaスラブ(プレキャストスラブ)で構成する場合に、各PCaスラブを概ね四辺形の形状とすることができる。このため、隅部におけるPCaスラブを一般部のPCaスラブと同様に施工することができる。しかし、隅切りしない場合に存在した隅部の柱と梁が存在しないため、建物の構造強度が低下する可能性がある。 Since the corners of the building disclosed in Patent Document 1 are cut off, when the floor slab is composed of PCa slabs (precast slabs), each PCa slab can have a substantially quadrilateral shape. Therefore, the PCa slab in the corner can be constructed in the same manner as the PCa slab in the general part. However, the structural strength of the building may be reduced because the corner columns and beams that existed without corner cutting are not present.

本発明は構造強度の確保が容易で、かつ施工性に優れたダブルチューブ型の建物を提供することを目的とする。 An object of the present invention is to provide a double tube type building in which structural strength can be easily secured and workability is excellent.

本発明の建物は、水平断面において概ね矩形の内周フレームと、内周フレームの外側に設けられ、水平断面において概ね矩形の外周フレームと、内周フレームの内側に設けられた内部耐震部材と、内周フレームと外周フレームとの間に周方向に分割して設けられた、複数の半PCa床スラブと、を有している。水平断面において、外周フレームは4つの外側辺部と4つの外側隅切り部とを有し、内周フレームは4つの内側辺部と4つの内側隅切り部とを有している。水平断面において、4つの外側辺部の梁の少なくとも一部は、外側隅切り部の梁より曲げ剛性が大きい曲げ剛性増大梁である。 The building of the present invention includes an inner frame having a substantially rectangular shape in a horizontal cross section, an outer frame having a substantially rectangular shape in a horizontal cross section provided outside the inner peripheral frame, and an internal seismic member provided inside the inner peripheral frame. It has a plurality of semi-PCa floor slabs provided separately in the circumferential direction between the inner peripheral frame and the outer peripheral frame. In a horizontal cross section, the outer peripheral frame has four outer edges and four outer corner cuts, and the inner peripheral frame has four inner edges and four inner corner cuts. In the horizontal section, at least a part of the four outer side beams is a bending rigidity increasing beam having a higher bending rigidity than the outer corner cutting beam.

本発明によれば、内周フレームと外周フレームに4つの隅切り部が設けられているため、隅切り部がない場合と比べて梁と柱の量が減少する。しかし、4つの外側辺部に位置する梁の少なくとも一部が、外側隅切り部に位置する梁より曲げ剛性が大きくされ、且つ内周フレームの内側に内部耐震部材が設けられるため、建物の構造強度の確保が容易である。また、半PCa床スラブを外側隅切り部と内側隅切り部とによって支持することができるため、良好な施工性を確保することができる。従って、本発明によれば、構造強度の確保が容易で、かつ施工性に優れたダブルチューブ型の建物を提供することができる。 According to the present invention, since the inner peripheral frame and the outer peripheral frame are provided with four corner cut portions, the amount of beams and columns is reduced as compared with the case where there is no corner cut portion. However, since at least a part of the beams located on the four outer side portions has higher bending rigidity than the beams located on the outer corner cut portion and the internal seismic resistance member is provided inside the inner peripheral frame, the structure of the building. It is easy to secure the strength. Further, since the semi-PCa floor slab can be supported by the outer corner cutting portion and the inner corner cutting portion, good workability can be ensured. Therefore, according to the present invention, it is possible to provide a double tube type building which is easy to secure the structural strength and has excellent workability.

本発明の一実施形態に係る建物の正面図である。It is a front view of the building which concerns on one Embodiment of this invention. 図1のA-A線に沿った建物の水平断面図である。It is a horizontal sectional view of the building along the line AA of FIG. 図1のB-B線に沿った建物の水平断面図である。It is a horizontal sectional view of the building along the line BB of FIG. 本発明の他の実施形態に係る建物の図2と同様の水平断面図である。It is the same horizontal sectional view as FIG. 2 of the building which concerns on other embodiment of this invention. 内側隅切り部と外側隅切り部が設けられない建物の水平断面図である。It is a horizontal sectional view of a building which does not provide an inner corner cut part and an outer corner cut part. 図2,3のC-C線に沿った建物の部分断面図である。It is a partial cross-sectional view of a building along the CC line of FIGS. 2 and 3. 図2,3のD-D線に沿った建物の部分断面図である。It is a partial cross-sectional view of a building along the DD line of FIGS. 2 and 3. 図2,3のE方向からみた建物の部分側面図である。It is a partial side view of the building seen from the E direction of FIGS. 2 and 3.

以下、図面を参照して本発明の建物の実施形態について説明する。本発明の建物は主に中高層塔状集合住宅(いわゆるタワーマンション)に好適に適用することができるが、建物の用途及び階数は特に限定されず、任意の用途ないし階数の建物に適用できる。図1は建物の正面図、図2は図1のA-A線に沿った建物の水平断面図であり、柱と梁の存在するレベルにおける建物の水平断面を示している。図3は図1のB-B線に沿った建物の水平断面図であり、梁の設けられていないレベルにおける建物の水平断面を示している。本明細書において「水平断面」は特記ない場合、柱と梁の存在するレベルにおける建物の水平断面、すなわち図2に示す断面を意味する。なお、図2において放射方向D1は建物1の中心1Aから離れる方向を意味し、周方向D2は建物1の中心1Aに関し時計回りまたは反時計周りの方向を意味する。 Hereinafter, embodiments of the building of the present invention will be described with reference to the drawings. The building of the present invention can be suitably applied mainly to middle-high-rise tower-shaped apartment buildings (so-called tower condominiums), but the use and number of floors of the building are not particularly limited, and can be applied to buildings of any use or number of floors. FIG. 1 is a front view of the building, FIG. 2 is a horizontal sectional view of the building along the line AA of FIG. 1, and shows a horizontal sectional view of the building at the level where columns and beams are present. FIG. 3 is a horizontal cross-sectional view of the building along line BB of FIG. 1, showing a horizontal cross-section of the building at a level without beams. As used herein, "horizontal section" means the horizontal section of a building at the level where columns and beams are present, that is, the section shown in FIG. 2, unless otherwise specified. In FIG. 2, the radial direction D1 means a direction away from the center 1A of the building 1, and the circumferential direction D2 means a clockwise or counterclockwise direction with respect to the center 1A of the building 1.

建物1は概ね矩形の、本実施形態では概ね正方形の平面形状を有している。建物1は内周フレーム2と、内周フレーム2の外側に設けられた外周フレーム3とを有している。内周フレーム2と外周フレーム3との間は複数の住戸4となっており、仕切り壁(図示せず)によって互いに区画されている。内側フレームの内側はエレベータ、階段室、パイプシャフトなどの縦シャフトが設けられたコアスペース5となっている。コアスペース5と住戸4との間には内周フレーム2に沿って周回する廊下6が設けられ、各住戸4へのアクセスが可能となっている。建物1の外周に沿ってバルコニー7が設けられている。 The building 1 has a substantially rectangular planar shape, and in the present embodiment, a substantially square planar shape. The building 1 has an inner peripheral frame 2 and an outer peripheral frame 3 provided outside the inner peripheral frame 2. A plurality of dwelling units 4 are formed between the inner peripheral frame 2 and the outer peripheral frame 3, and are partitioned from each other by a partition wall (not shown). The inside of the inner frame is a core space 5 provided with vertical shafts such as an elevator, a staircase, and a pipe shaft. A corridor 6 that circulates along the inner peripheral frame 2 is provided between the core space 5 and the dwelling unit 4, and access to each dwelling unit 4 is possible. A balcony 7 is provided along the outer circumference of the building 1.

内周フレーム2は所定間隔で設けられた内側柱11と、内側柱11に沿って連続的に設けられた内側梁12とで構成されている。外周フレーム3は所定間隔で設けられた外側柱13と、外側柱13に沿って連続的に設けられた外側梁14とで構成されている。内周フレーム2と外周フレーム3は柱と梁で構成された架構であり、構造要素としての壁(耐震壁)は設けられていない。内周フレーム2は水平断面において4つの内側辺部2Aと4つの内側隅切り部2Bとで構成された概ね矩形の平面形状を有している。同様に、外周フレーム3は水平断面において4つの外側辺部3Aと4つの外側隅切り部3Bとで構成された概ね矩形の平面形状を有している。換言すれば、内側梁12は水平断面において4つの内側辺部2Aと4つの内側隅切り部2Bを構成し、外側梁14は水平断面において4つの外側辺部3Aと4つの外側隅切り部3Bを構成する。内側隅切り部2Bと外側隅切り部3Bは互いに対して対向して設けられている。4つの内側隅切り部2Bは隣接する2つの内側辺部2Aに対して45度の角度をなし、4つの外側隅切り部3Bは隣接する2つの外側辺部3Aに対して45度の角度をなしている。4つの内側辺部2A、4つの内側隅切り部2B、4つの外側辺部3A、4つの外側隅切り部3Bはそれぞれ同一の長さを有している。内周フレーム2と外周フレーム3はほぼ相似形であり、かつそれらの中心が水平断面における建物1の中心1Aと一致している。 The inner peripheral frame 2 is composed of inner columns 11 provided at predetermined intervals and inner beams 12 continuously provided along the inner columns 11. The outer peripheral frame 3 is composed of outer pillars 13 provided at predetermined intervals and outer beams 14 continuously provided along the outer pillar 13. The inner peripheral frame 2 and the outer peripheral frame 3 are frames composed of columns and beams, and are not provided with a wall (shear wall) as a structural element. The inner peripheral frame 2 has a substantially rectangular planar shape composed of four inner side portions 2A and four inner corner cutting portions 2B in a horizontal cross section. Similarly, the outer peripheral frame 3 has a substantially rectangular planar shape composed of four outer side portions 3A and four outer corner cutting portions 3B in a horizontal cross section. In other words, the inner beam 12 constitutes four inner side portions 2A and four inner corner cut portions 2B in the horizontal cross section, and the outer beam 14 comprises four outer side portions 3A and four outer corner cut portions 3B in the horizontal cross section. To configure. The inner corner cutting portion 2B and the outer corner cutting portion 3B are provided so as to face each other. The four inner corner cuts 2B have an angle of 45 degrees with respect to the two adjacent inner side portions 2A, and the four outer corner cuts 3B have an angle of 45 degrees with respect to the two adjacent outer side portions 3A. Nothing. The four inner side portions 2A, the four inner corner cutting portions 2B, the four outer side portions 3A, and the four outer corner cutting portions 3B each have the same length. The inner peripheral frame 2 and the outer peripheral frame 3 are substantially similar in shape, and their centers coincide with the center 1A of the building 1 in the horizontal cross section.

内側隅切り部2Bと外側隅切り部3Bを設けることで、建物1のコーナー部の住戸面積を確保することが容易となる。すなわち、外側隅切り部3Bを設けることで建物1のコーナー部の住戸面積は減少するが、内側隅切り部2Bを設けることで減少した住戸面積の少なくとも一部を補償することができる。内側隅切り部2Bと内側辺部2Aの寸法比及び外側隅切り部3Bと外側辺部3Aの寸法比は特に限定されないが、内側隅切り部2Bの長さが内側辺部2Aの長さより短く、且つ外側隅切り部3Bの長さが外側辺部3Aの長さより短い範囲で自由に設定することができる。内側隅切り部2Bの長さをできるだけ長くし、外側隅切り部3Bの長さをできるだけ短くすることで住戸面積の確保は容易となるが、内側隅切り部2Bと外側隅切り部3Bの間隔が増加し、後述する半PCa床スラブ15のスパンが増加する。従って、内側隅切り部2Bと外側隅切り部3Bの長さは、両者のバランスを考慮して決定することが望ましい。 By providing the inner corner cutting portion 2B and the outer corner cutting portion 3B, it becomes easy to secure the dwelling unit area of the corner portion of the building 1. That is, the area of the dwelling unit at the corner of the building 1 is reduced by providing the outer corner cut portion 3B, but at least a part of the reduced dwelling unit area can be compensated by providing the inner corner cut portion 2B. The dimensional ratio between the inner corner cut portion 2B and the inner side portion 2A and the dimensional ratio between the outer corner cut portion 3B and the outer side portion 3A are not particularly limited, but the length of the inner corner cut portion 2B is shorter than the length of the inner side portion 2A. Moreover, the length of the outer corner cutting portion 3B can be freely set within a range shorter than the length of the outer side portion 3A. By making the length of the inner corner cut portion 2B as long as possible and the length of the outer corner cut portion 3B as short as possible, it is easy to secure the area of the dwelling unit, but the distance between the inner corner cut portion 2B and the outer corner cut portion 3B Increases, and the span of the semi-PCa floor slab 15, which will be described later, increases. Therefore, it is desirable that the lengths of the inner corner cutting portion 2B and the outer corner cutting portion 3B are determined in consideration of the balance between the two.

内周フレーム2の内側には内部耐震部材8が設けられている。内部耐震部材8は柱8Aと梁8Bとからなる内部フレームである。柱8Aは建物1の中心1Aの周囲に均等に配置され、梁8Bは内側梁12及び外側梁14と平行に、且つ互いに直交する方向に、各方向で同程度の梁量となるように配置されている。エレベータ、階段室などの縦シャフトは柱8Aの間の空間に設置される。図4に示すように、内部耐震部材8は耐震壁8Cであってもよい。耐震壁8Cは互いに直交する方向に、各方向で同程度の壁量となるように配置されている。耐震壁8Cはエレベータ、階段室などを仕切る仕切壁としても利用され、最下階から最上階まで連続的に設けられている。耐震壁8Cには廊下6との連絡のため、部分的に開口(図示せず)が設けられている。内部フレームと耐震壁8Cは構造設計、施工性などを考慮して選択することができるが、意匠設計上は内部フレームのほうが開放感に優れ、耐震壁8Cより有利となる場合が多い。 An internal seismic member 8 is provided inside the inner peripheral frame 2. The internal seismic member 8 is an internal frame composed of columns 8A and beams 8B. The pillars 8A are evenly arranged around the center 1A of the building 1, and the beams 8B are arranged in parallel with the inner beam 12 and the outer beam 14 and in the directions orthogonal to each other so as to have the same amount of beams in each direction. Has been done. Vertical shafts such as elevators and staircases are installed in the space between the pillars 8A. As shown in FIG. 4, the internal seismic member 8 may be a seismic wall 8C. The shear walls 8C are arranged in the directions orthogonal to each other so that the wall amount is the same in each direction. The seismic wall 8C is also used as a partition wall for partitioning elevators, staircases, etc., and is continuously provided from the bottom floor to the top floor. The earthquake-resistant wall 8C is partially provided with an opening (not shown) for communication with the corridor 6. The internal frame and the seismic wall 8C can be selected in consideration of structural design, workability, etc., but in terms of design design, the internal frame is superior in openness and is often more advantageous than the seismic wall 8C.

内周フレーム2と外周フレーム3との間には、周方向D2に分割された複数の半PCa床スラブ15が設けられている。後述するように、半PCa床スラブ15は、工場で製作されるPCa版16と、PCa版16上に現場施工されるRC(鉄筋コンクリート)版17とからなる複合構造である(図6,7参照)。半PCa床スラブ15は四辺形の平面形状を有しているが、場所によって形状が異なっている。すなわち、内側辺部2Aの中央付近と外側辺部3Aの中央付近との間に設けられる半PCa床スラブ15はほぼ矩形であるが、内側隅切り部2B及び外側隅切り部3Bに近づくにつれ、外側辺部3Aに支持される辺の長さが内側辺部2Aに支持される辺の長さより長くなっている。内側隅切り部2Bの中央付近と外側隅切り部3Bの中央付近との間に設けられる半PCa床スラブ15は、外側辺部3Aに支持される辺の長さと内側辺部2Aに支持される辺の長さの差が最大となっており、且つほぼ台形形状となっている。このように半PCa床スラブ15の形状を場所によって変えることで、外側辺部3Aに支持される半PCa床スラブ15の辺の長さをできるだけ均一化することができる。これによって、工場で製作されるPCa版16の輸送の制約を軽減することが可能となる。なお、床スラブは全てがPCa版からなるフルPCa床スラブとすることも可能であるが、輸送や揚重機の制約から半PCa床スラブとすることが好ましい。 A plurality of half PCa floor slabs 15 divided in the circumferential direction D2 are provided between the inner peripheral frame 2 and the outer peripheral frame 3. As will be described later, the semi-PCa floor slab 15 has a composite structure consisting of a PCa plate 16 manufactured at a factory and an RC (reinforced concrete) plate 17 constructed on-site on the PCa plate 16 (see FIGS. 6 and 7). ). The semi-PCa floor slab 15 has a quadrilateral planar shape, but the shape differs depending on the location. That is, the semi-PCa floor slab 15 provided between the vicinity of the center of the inner side portion 2A and the vicinity of the center of the outer side portion 3A is substantially rectangular, but as it approaches the inner corner cutting portion 2B and the outer corner cutting portion 3B, The length of the side supported by the outer side portion 3A is longer than the length of the side supported by the inner side portion 2A. The semi-PCa floor slab 15 provided between the vicinity of the center of the inner corner cutting portion 2B and the vicinity of the center of the outer corner cutting portion 3B is supported by the length of the side supported by the outer side portion 3A and the inner side portion 2A. The difference in the length of the sides is the maximum, and the shape is almost trapezoidal. By changing the shape of the half PCa floor slab 15 depending on the location in this way, the length of the sides of the half PCa floor slab 15 supported by the outer side portion 3A can be made as uniform as possible. This makes it possible to reduce the restrictions on the transportation of the PCa version 16 manufactured at the factory. Although the floor slab can be a full PCa floor slab made entirely of PCa version, it is preferable to use a semi-PCa floor slab due to restrictions on transportation and lifting equipment.

全ての半PCa床スラブ15は四辺形の平面形状を有し、その一つの辺15Aが内側辺部2Aまたは内側隅切り部2Bに、辺15Aと対向する他の辺15Bが外側辺部3Aまたは外側隅切り部3Bに支持されている。換言すれば、全ての半PCa床スラブ15は内側辺部2Aまたは内側隅切り部2Bに支持される辺15Aと、外側辺部3Aまたは外側隅切り部3Bに支持される辺15Bとを有している。建物1のコーナー部の半PCa床スラブ15は、内側隅切り部2Bと外側隅切り部3Bとの間に設けられており、内側隅切り部2Bに支持される辺15Aと外側隅切り部3Bに支持される辺15Bとを有している。図5は、内側隅切り部2Bと外側隅切り部3Bが設けられない比較例の建物101の、図2と同じ水平断面を示している。建物101のコーナー部には、鋭角の頂部をもつ複数の三角形の半PCa床スラブ115が、鋭角の頂部が内側隅部2Cに位置するように配置されている。半PCa床スラブ115のPCa版の周囲には多数の鉄筋が配置されるため、半PCa床スラブ115の施工が極めて困難である。また、内側隅部2Cの近傍には床開口を設けることも困難である。これに対して本実施形態では、複数の半PCa床スラブ15が内側隅切り部2Bに沿って並列して配置されるため、コーナー部の半PCa床スラブ15を他の半PCa床スラブ15と同様に設置することができ、建物1の施工性が向上する。 All half PCa floor slabs 15 have a quadrilateral planar shape, one side 15A of which is the inner side 2A or inner corner cut 2B, and the other side 15B facing the side 15A is the outer side 3A or It is supported by the outer corner cutting portion 3B. In other words, all half PCa floor slabs 15 have a side 15A supported by the inner side 2A or the inner corner cut 2B and a side 15B supported by the outer side 3A or the outer corner 3B. ing. The half PCa floor slab 15 at the corner of the building 1 is provided between the inner corner cut portion 2B and the outer corner cut portion 3B, and the side 15A and the outer corner cut portion 3B supported by the inner corner cut portion 2B are provided. It has a side 15B supported by. FIG. 5 shows the same horizontal cross section as in FIG. 2 of the building 101 of the comparative example in which the inner corner cutting portion 2B and the outer corner cutting portion 3B are not provided. At the corners of the building 101, a plurality of triangular semi-PCa floor slabs 115 having acute-angled tops are arranged such that the acute-angled tops are located at the inner corner 2C. Since a large number of reinforcing bars are arranged around the PCa plate of the half PCa floor slab 115, it is extremely difficult to construct the half PCa floor slab 115. It is also difficult to provide a floor opening in the vicinity of the inner corner 2C. On the other hand, in the present embodiment, since the plurality of half PCa floor slabs 15 are arranged in parallel along the inner corner cutting portion 2B, the half PCa floor slab 15 at the corner portion is combined with the other half PCa floor slab 15. It can be installed in the same manner, and the workability of the building 1 is improved.

半PCa床スラブ15は位置によって形状が異なるが、すべて放射方向D1に長く、周方向D2に短い形状を有しているため、1方向スラブとして設計することができる。この場合、放射方向D1の長さが最も長い半PCa床スラブ15に合わせて全ての半PCa床スラブ15を設計することになる。従って、放射方向D1の長さが長くなりやすいコーナー部の半PCa床スラブ15は、放射方向D1の長さができるだけ小さくなるように設計することが好ましい。本実施形態では内側隅切り部2Bと外側隅切り部3Bは直線状の形状を有しているため、曲線状に外側に膨らんだ外側隅切り部と比べて、半PCa床スラブ15の放射方向D1の長さの増加を抑えることができる。 Although the shape of the half PCa floor slab 15 differs depending on the position, all of them have a long shape in the radial direction D1 and a short shape in the circumferential direction D2, so that they can be designed as a one-way slab. In this case, all the half PCa floor slabs 15 are designed according to the half PCa floor slab 15 having the longest radial direction D1. Therefore, it is preferable to design the semi-PCa floor slab 15 at the corner where the length of the radial direction D1 tends to be long so that the length of the radial direction D1 is as small as possible. In the present embodiment, since the inner corner cutting portion 2B and the outer corner cutting portion 3B have a linear shape, the radial direction of the semi-PCa floor slab 15 is compared with the outer corner cutting portion that bulges outward in a curved shape. The increase in the length of D1 can be suppressed.

図6は図2,3のC-C線に沿った、内側辺部2Aと外側辺部3Aの間の区間を示す断面図、図7は図2,3のD-D線に沿った、内側隅切り部2Bと外側隅切り部3Bの間の区間を示す断面図である。図8は図2,3のE方向からみた側面図であり、2つの外側辺部3Aとこれらに挟まれる一つの外側隅切り部3Bとを展開図で示している。 6 is a cross-sectional view showing a section between the inner side 2A and the outer side 3A along the CC lines of FIGS. 2 and 3, and FIG. 7 is along the DD lines of FIGS. 2 and 3. It is sectional drawing which shows the section between the inner corner cutting part 2B and the outer corner cutting part 3B. FIG. 8 is a side view seen from the direction E of FIGS. 2 and 3, and shows two outer side portions 3A and one outer corner cutting portion 3B sandwiched between them in a developed view.

前述のように半PCa床スラブ15はPCa版16と、その上に現場施工されるRC版17とからなっている。PCa版16は内側梁12及び外側梁14に設けられた切欠き19に支持される。PCa版16の厚さの増加を防止するため、PCa版16の放射方向D1の長さは例えば10m程度に抑えることが望ましい。RC版17には重量を抑えるため、ボイド(空洞)17Aが設けられている。図示は省略するが、PCa版16には半PCa床スラブ15の下端筋となる鉄筋やフープ筋が配置されており、RC版17には半PCa床スラブ15の上端筋などが配置されている。内側辺部2Aと外側辺部3Aとの間(図6)及び内側隅切り部2Bと外側隅切り部3Bとの間(図7)は住戸4となっており、住戸4の外側はバルコニー7となっている。なお、説明上、図6,7ではバルコニー7の奥行きを誇張して表示している。住戸4ではRC版17上に床板9が設置され、住戸4とバルコニー7との間は窓10で仕切られている。PCa版16は無梁版であるため、住居内の天井高さの確保が容易であるとともに、解放感のある窓10の設置が可能である。 As described above, the semi-PCa floor slab 15 is composed of a PCa version 16 and an RC version 17 constructed on the site. The PCa plate 16 is supported by a notch 19 provided in the inner beam 12 and the outer beam 14. In order to prevent an increase in the thickness of the PCa plate 16, it is desirable that the length of the radial direction D1 of the PCa plate 16 is suppressed to, for example, about 10 m. The RC plate 17 is provided with a void (cavity) 17A in order to reduce the weight. Although not shown, the PCa version 16 has reinforcing bars and hoop bars that are the lower end bars of the half PCa floor slab 15, and the RC version 17 has the upper end bars of the half PCa floor slab 15. .. The dwelling unit 4 is located between the inner side portion 2A and the outer side portion 3A (FIG. 6) and between the inner corner cutting portion 2B and the outer corner cutting portion 3B (FIG. 7), and the outside of the dwelling unit 4 is the balcony 7. It has become. For the sake of explanation, FIGS. 6 and 7 exaggerate the depth of the balcony 7. In the dwelling unit 4, a floor plate 9 is installed on the RC plate 17, and the dwelling unit 4 and the balcony 7 are separated by a window 10. Since the PCa version 16 is a beamless version, it is easy to secure the ceiling height in the house, and it is possible to install the window 10 with a feeling of liberation.

図8(a)に示すように、4つの外側辺部3Aに位置する外側梁14の少なくとも一部(以下、曲げ剛性増大梁14Aという)は、外側隅切り部3Bに位置する外側梁14より曲げ剛性(断面2次モーメント)が大きい。これによって、内側隅切り部2Bと外側隅切り部3Bを設けたことによる建物1の強度の低下を補うことができる。曲げ剛性増大梁14Aは順梁でもよいが、逆梁とすることがより好ましい。曲げ剛性増大梁14Aは梁せいが大きくなる傾向があるため、順梁とすると上階の床から梁が下方に突き出し下階の住戸4からの景観を損ねる可能性がある。逆梁は順梁とは逆に床から上方に突き出すが、バルコニー7には安全用の柵18が設けられているため、景観上大きな問題はない。さらに、逆梁とすることで、バルコニー7の足元の安心感やプライバシー性を高めることができる。 As shown in FIG. 8A, at least a part of the outer beam 14 located at the four outer side portions 3A (hereinafter referred to as the flexural rigidity increasing beam 14A) is from the outer beam 14 located at the outer corner cutting portion 3B. Flexural rigidity (second moment of area) is large. This makes it possible to compensate for the decrease in strength of the building 1 due to the provision of the inner corner cutting portion 2B and the outer corner cutting portion 3B. The bending rigidity increasing beam 14A may be a forward beam, but it is more preferable to use a reverse beam. Since the beam 14A with increased bending rigidity tends to have a large beam length, if it is a forward beam, the beam may protrude downward from the floor on the upper floor and spoil the view from the dwelling unit 4 on the lower floor. The reverse beam protrudes upward from the floor, contrary to the normal beam, but since the balcony 7 is provided with a safety fence 18, there is no major problem in terms of the landscape. Further, by using a reverse beam, it is possible to enhance the sense of security and privacy at the feet of the balcony 7.

外周フレーム3は、少なくとも外側隅切り部3Bに位置する扁平梁14Bを有している。特に、外側隅切り部3Bの全長が扁平梁14Bで構成されることが好ましい。扁平梁14Bは一般的な順梁と比べ、上階床スラブからの梁の垂れ下がりがないため、景観面で有利である。また、バルコニー7の足元に梁がないため、奥行きと解放感のあるバルコニー7を提供することができる。建物1のコーナー部の住居は一般に高グレードとされることが多く、商品性の面からの優位性も確保できる。図8(a)に示すように、逆梁14Aと扁平梁14Bの下面は同一水平平面にある。図8(b)に示すように、扁平梁14Bが一般的な順梁114Bであると、逆梁14Aの上端と順梁114Bの下端との間隔で決まる柱13の高さHを十分に確保することができず、柱13のせん断強度の確保が困難となる場合がある。扁平梁14Bを用いることで柱13の高さHを十分に確保することができる。 The outer peripheral frame 3 has a flat beam 14B located at least at the outer corner cut portion 3B. In particular, it is preferable that the total length of the outer corner cutting portion 3B is composed of the flat beam 14B. The flat beam 14B is advantageous in terms of landscape because the beam does not hang down from the upper floor slab as compared with a general normal beam. Further, since there is no beam at the foot of the balcony 7, it is possible to provide the balcony 7 with a sense of depth and liberation. The dwellings in the corners of the building 1 are generally considered to be of high grade, and it is possible to secure an advantage in terms of commercial value. As shown in FIG. 8A, the lower surfaces of the inverted beam 14A and the flat beam 14B are on the same horizontal plane. As shown in FIG. 8B, when the flat beam 14B is a general forward beam 114B, the height H of the column 13 determined by the distance between the upper end of the reverse beam 14A and the lower end of the forward beam 114B is sufficiently secured. It may be difficult to secure the shear strength of the column 13. By using the flat beam 14B, the height H of the column 13 can be sufficiently secured.

曲げ剛性増大梁14Aと扁平梁14Bの設置範囲は建物1の階によって変えることができる。地震力の大きい下層階では4つの外側辺部3Aの全長を曲げ剛性増大梁14A(逆梁)で構成し、4つの外側隅切り部3Bの全長を扁平梁14Bで構成することができる。一方、地震力の小さい上層階では4つの外側辺部3Aの一部を曲げ剛性増大梁14A(逆梁)で構成し、外側辺部3Aの残りを順梁または扁平梁14Bで構成することができる。あるいは、上層階と下層階で曲げ剛性増大梁14A(逆梁)の設置範囲を同程度とし、上層階の曲げ剛性増大梁14Aの梁せいを下層階の曲げ剛性増大梁14Aの梁せいより小さくしてもよい。 The installation range of the flexural rigidity increasing beam 14A and the flat beam 14B can be changed depending on the floor of the building 1. In the lower floor where the seismic force is large, the total length of the four outer side portions 3A can be composed of the bending rigidity increasing beam 14A (reverse beam), and the total length of the four outer corner cutting portions 3B can be composed of the flat beam 14B. On the other hand, in the upper floor where the seismic force is small, a part of the four outer side portions 3A may be composed of a bending rigidity increasing beam 14A (reverse beam), and the rest of the outer side portion 3A may be composed of a forward beam or a flat beam 14B. can. Alternatively, the installation range of the flexural rigidity increasing beam 14A (reverse beam) is set to the same level on the upper floor and the lower floor, and the beam rigidity of the bending rigidity increasing beam 14A on the upper floor is smaller than that of the bending rigidity increasing beam 14A on the lower floor. You may.

1 建物
2 内周フレーム
2A 内側辺部
2B 内側隅切り部
3 外周フレーム
3A 外側辺部
3B 外側隅切り部
8 内部耐震部材
11 内側柱
12 内側梁
13 外側柱
14 外側梁
14A 逆梁(曲げ剛性増大梁)
14B 扁平梁
15 半PCa床スラブ
1 Building 2 Inner circumference frame 2A Inner side 2B Inner corner cut 3 Outer frame 3A Outer side 3B Outer corner cut 8 Internal seismic member 11 Inner pillar 12 Inner beam 13 Outer pillar 14 Outer beam 14A Reverse beam (increased bending rigidity) Beam)
14B flat beam 15 half PCa floor slab

Claims (8)

水平断面において概ね矩形の内周フレームと、前記内周フレームの外側に設けられ、前記水平断面において概ね矩形の外周フレームと、前記内周フレームの内側に設けられた内部耐震部材と、前記内周フレームと前記外周フレームとの間に周方向に分割して設けられた、複数の半PCa床スラブと、を有し、
前記水平断面において、前記外周フレームは4つの外側辺部と4つの外側隅切り部とを有し、前記内周フレームは4つの内側辺部と4つの内側隅切り部とを有し、
前記水平断面において、前記4つの外側辺部の梁の少なくとも一部は、前記外側隅切り部の梁より曲げ剛性が大きい曲げ剛性増大梁である、建物。
An inner peripheral frame that is substantially rectangular in the horizontal cross section, an outer peripheral frame that is provided outside the inner peripheral frame and is substantially rectangular in the horizontal cross section, an internal seismic member provided inside the inner peripheral frame, and the inner circumference. It has a plurality of semi-PCa floor slabs, which are divided in the circumferential direction between the frame and the outer peripheral frame.
In the horizontal cross section, the outer peripheral frame has four outer sides and four outer corners, and the inner frame has four inner sides and four inner corners.
In the horizontal cross section, at least a part of the four outer side beams is a bending rigidity increasing beam having a higher bending rigidity than the outer corner cutting beam.
前記水平断面において、前記曲げ剛性増大梁は前記内側辺部及び前記内側隅切り部の梁より曲げ剛性が大きい、請求項1に記載の建物。 The building according to claim 1, wherein in the horizontal cross section, the bending rigidity increasing beam has a higher bending rigidity than the beam of the inner side portion and the inner corner cutting portion. 前記曲げ剛性増大梁は逆梁である、請求項1または2に記載の建物。 The building according to claim 1 or 2, wherein the bending rigidity increasing beam is a reverse beam. 前記外側隅切り部の梁の少なくとも一部は扁平梁である、請求項3に記載の建物。 The building according to claim 3, wherein at least a part of the beam of the outer corner cutting portion is a flat beam. 前記逆梁の下面と前記扁平梁の下面は同一水平面にある、請求項4に記載の建物。 The building according to claim 4, wherein the lower surface of the reverse beam and the lower surface of the flat beam are on the same horizontal plane. 前記複数の半PCa床スラブの一部は前記内側隅切り部と前記外側隅切り部との間に設けられ、且つ前記内側隅切り部に支持される辺と前記外側隅切り部に支持される辺とを有する、請求項1から5のいずれか1項に記載の建物。 A part of the plurality of half PCa floor slabs is provided between the inner corner cutting portion and the outer corner cutting portion, and is supported by the side supported by the inner corner cutting portion and the outer corner cutting portion. The building according to any one of claims 1 to 5, which has an edge. 前記内側隅切り部と前記外側隅切り部は直線状であり、前記半PCa床スラブは四辺形の平面形状を有している、請求項6に記載の建物。 The building according to claim 6, wherein the inner corner cut portion and the outer corner cut portion are linear, and the semi-PCa floor slab has a quadrilateral planar shape. 前記建物は集合住宅である、請求項1から7のいずれか1項に記載の建物。 The building according to any one of claims 1 to 7, wherein the building is an apartment house.
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