JP7848067B2 - Roof structure - Google Patents
Roof structureInfo
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- JP7848067B2 JP7848067B2 JP2022104374A JP2022104374A JP7848067B2 JP 7848067 B2 JP7848067 B2 JP 7848067B2 JP 2022104374 A JP2022104374 A JP 2022104374A JP 2022104374 A JP2022104374 A JP 2022104374A JP 7848067 B2 JP7848067 B2 JP 7848067B2
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Description
本発明は、平面視で環状扇形に構成された環状扇形屋根部と、当該環状扇形屋根部を支持する支持部と、を備えた屋根構造に関する。 This invention relates to a roof structure comprising an annular fan-shaped roof section configured in a plan view, and a support section that supports the annular fan-shaped roof section.
平面視で環状扇形に構成された環状扇形屋根部と、当該環状扇形屋根部を支持する支持部と、を備えた屋根構造が知られている（例えば特許文献１の図２を参照。）
特許文献１記載の屋根構造では、環状扇形屋根部は、上記環状扇形の径方向外側と径方向内側との両側で支持部により支持されている。
A roof structure is known that comprises an annular fan-shaped roof section configured in a plan view and a support section that supports the annular fan-shaped roof section (see, for example, Figure 2 of Patent Document 1).
In the roof structure described in Patent Document 1, the annular fan-shaped roof section is supported by support parts on both the radially outer and radially inner sides of the annular fan-shaped section.
環状扇形屋根部の下側空間では、環状扇形の径方向内側が径方向外側よりも狭くなる。よって、その径方向内側の下側空間に、環状扇形屋根部を支持する支持部を設置すると、当該空間が窮屈な状態となって解放感が損なわれるという問題がある。そこで、環状扇形屋根部を環状扇形の径方向外側のみで片持ち支持することが考えられる。しかしながら、その片持ち支持の構成によっては、環状扇形屋根部の支持部に生じる曲げ応力や先端部の撓みが問題となる。そして、このような曲げ応力や先端部の撓みを抑制するために環状扇形屋根部自身及びその支持部を非常に強固で大断面のものとすれば、コストアップや下側空間の縮小等が課題となる。
この実情に鑑み、本発明の主たる課題は、平面視で環状扇形に構成された環状扇形屋根部と、当該環状扇形屋根部を支持する支持部と、を備えた屋根構造において、環状扇形屋根部を環状扇形の径方向外側のみで片持ち支持とすることで、環状扇形屋根部の径方向内側の下側空間を解放感に優れたものとしながら、環状扇形屋根部の曲げ応力や先端部の撓みを合理的に抑制することができる技術を提供する点にある。
In the space beneath the annular fan-shaped roof, the radially inner side of the annular fan is narrower than the radially outer side. Therefore, if a support structure for the annular fan-shaped roof is installed in this radially inner space beneath the roof, the space becomes cramped, resulting in a loss of openness. Thus, it is conceivable to cantilever support the annular fan-shaped roof only on the radially outer side of the annular fan. However, depending on the configuration of this cantilever support, bending stress and deflection at the tip of the annular fan-shaped roof become problematic. Furthermore, if the annular fan-shaped roof itself and its support structure are made very strong and large in cross-section to suppress such bending stress and tip deflection, then increased costs and a reduction in the space beneath it become issues.
In view of these circumstances, the main objective of the present invention is to provide a roof structure comprising an annular fan-shaped roof section configured in a plan view and a support section that supports the annular fan-shaped roof section, in which the annular fan-shaped roof section is cantilevered only on the radially outer side of the annular fan, thereby providing a sense of openness in the lower space on the radially inner side of the annular fan-shaped roof section, while rationally suppressing bending stress and deflection at the tip of the annular fan-shaped roof section.
本発明の第１特徴構成は、平面視で環状扇形に構成された環状扇形屋根部と、当該環状扇形屋根部を支持する支持部と、を備えた屋根構造であって、
前記環状扇形屋根部が、前記環状扇形の径方向に所定の屋根勾配で延在する主梁を前記環状扇形の周方向に複数並設して有すると共に、
前記支持部が、前記環状扇形屋根部が有する複数の主梁を前記環状扇形の径方向外側で片持ち支持するものとして構成されており、
前記環状扇形屋根部が、前記環状扇形の径方向内側縁部に沿って略円弧状に延在して前記複数の主梁の夫々の内側端部が接続された内円弧梁と、前記複数の主梁の夫々の隣接間に架設されたブレースと、を有し、
前記屋根勾配が、前記環状扇形の径方向外側から前記環状扇形の径方向内側に向けて下る内向き下り勾配である点にある。
The first characteristic configuration of the present invention is a roof structure comprising an annular fan-shaped roof section configured in an annular fan shape in plan view, and a support section that supports the annular fan-shaped roof section,
The annular fan-shaped roof section has a plurality of main beams arranged in parallel in the circumferential direction of the annular fan, extending in the radial direction of the annular fan with a predetermined roof slope,
The support portion is configured to cantilever support the multiple main beams of the annular fan-shaped roof portion on the radially outer side of the annular fan shape.
The annular fan-shaped roof section comprises an inner arc beam that extends in a substantially arc shape along the radially inner edge of the annular fan and to which the inner ends of each of the plurality of main beams are connected, and braces that are installed between adjacent members of the plurality of main beams .
The key feature of the roof slope is that it is an inward downward slope, descending from the radially outer side of the annular fan shape towards the radially inner side of the annular fan shape .
尚、以下の説明において、上記環状扇形の径方向を単に「径方向」と呼ぶ場合があり、上記環状扇形の周方向を単に「周方向」と呼ぶ場合がある。
本構成によれば、上記環状扇形屋根部において、複数の主梁が周方向に並設されており、それら複数の主梁が径方向外側で上記支持部により片持ち支持される。このことで、環状扇形屋根部における径方向内側の下側空間を、上記支持部が存在しない解放感に優れたものにできる。
更に、上記環状扇形屋根部において、上記複数の主梁の夫々を、径方向に沿って支持部により片持ち支持される外側から内側に向けて所定の屋根勾配で延在するものとした上で、上記内円弧梁及び上記ブレースが設けられている。このことで、主梁に生じる曲げ応力や撓みを、ブレースを通じて、上記内円弧梁の軸力により好適に抵抗することができる。
従って、本発明により、平面視で環状扇形に構成された環状扇形屋根部と、当該環状扇形屋根部を支持する支持部と、を備えた屋根構造において、環状扇形屋根部を環状扇形の径方向外側のみで片持ち支持とすることで、環状扇形屋根部の径方向内側の下側空間を解放感に優れたものとしながら、環状扇形屋根部の曲げ応力や先端部の撓みを合理的に抑制することができる技術を提供することができる。
In the following explanation, the radial direction of the above-mentioned annular sector may be simply referred to as the "radial direction," and the circumferential direction of the above-mentioned annular sector may be simply referred to as the "circumferential direction."
In this configuration, in the annular fan-shaped roof section, multiple main beams are arranged in a circumferential direction, and these multiple main beams are cantilevered on the radially outer side by the support structure. This makes the lower space on the radially inner side of the annular fan-shaped roof section feel more open and free from the presence of the support structure.
Furthermore, in the annular fan-shaped roof section described above, each of the multiple main beams is cantilevered along the radial direction by a support section, extending from the outside inward with a predetermined roof slope, and the inner arc beam and brace are provided. This allows the bending stress and deflection occurring in the main beams to be effectively resisted by the axial force of the inner arc beam through the brace.
Accordingly, the present invention provides a roof structure comprising an annular fan-shaped roof section configured in a plan view and a support section that supports the annular fan-shaped roof section, in which the annular fan-shaped roof section is cantilevered only on the radially outer side of the annular fan, thereby providing a sense of openness in the lower space on the radially inner side of the annular fan-shaped roof section, while rationally suppressing bending stress and deflection at the tip of the annular fan-shaped roof section.
更に、本構成によれば、上記環状扇形屋根部において、複数の主梁の夫々が、径方向外側から径方向内側に向けて下る内向き下り勾配で延在するものとなる。よって、主梁に生じる曲げ応力や撓みを、ブレースを通じて、上記内円弧梁の引張力により好適に抵抗することができる。
Furthermore, with this configuration, in the annular fan-shaped roof section, each of the multiple main beams extends with an inward downward slope, descending from the radially outer side to the radially inner side. Therefore, the bending stress and deflection generated in the main beams can be effectively resisted by the tensile force of the inner circular arc beam through the braces.
本発明の第２特徴構成は、平面視で環状扇形に構成された環状扇形屋根部と、当該環状扇形屋根部を支持する支持部と、を備えた屋根構造であって、
前記環状扇形屋根部が、前記環状扇形の径方向に所定の屋根勾配で延在する主梁を前記環状扇形の周方向に複数並設して有すると共に、
前記支持部が、前記環状扇形屋根部が有する複数の主梁を前記環状扇形の径方向外側で片持ち支持するものとして構成されており、
前記環状扇形屋根部が、前記環状扇形の径方向内側縁部に沿って略円弧状に延在して前記複数の主梁の夫々の内側端部が接続された内円弧梁と、前記複数の主梁の夫々の隣接間に架設されたブレースと、を有し、
前記環状扇形屋根部の下方に配置されて前記環状扇形の径方向に延在する躯体壁を前記支持部として備えた点にある。
A second characteristic configuration of the present invention is a roof structure comprising an annular fan-shaped roof section configured in an annular fan shape in plan view, and a support section that supports the annular fan-shaped roof section,
The annular fan-shaped roof section has a plurality of main beams arranged in parallel in the circumferential direction of the annular fan, extending in the radial direction of the annular fan with a predetermined roof slope,
The support portion is configured to cantilever support the multiple main beams of the annular fan-shaped roof portion on the radially outer side of the annular fan shape.
The annular fan-shaped roof section comprises an inner arc beam that extends in a substantially arc shape along the radially inner edge of the annular fan and to which the inner ends of each of the plurality of main beams are connected, and braces that are installed between adjacent members of the plurality of main beams.
The key feature is that the structural wall, positioned below the annular fan-shaped roof section and extending radially in the annular fan shape, serves as the support section.
本構成によれば、上記環状扇形屋根部において、複数の主梁が周方向に並設されており、それら複数の主梁が径方向外側で上記支持部により片持ち支持される。このことで、環状扇形屋根部における径方向内側の下側空間を、上記支持部が存在しない解放感に優れたものにできる。
更に、上記環状扇形屋根部において、上記複数の主梁の夫々を、径方向に沿って支持部により片持ち支持される外側から内側に向けて所定の屋根勾配で延在するものとした上で、上記内円弧梁及び上記ブレースが設けられている。このことで、主梁に生じる曲げ応力や撓みを、ブレースを通じて、上記内円弧梁の軸力により好適に抵抗することができる。
従って、本発明により、平面視で環状扇形に構成された環状扇形屋根部と、当該環状扇形屋根部を支持する支持部と、を備えた屋根構造において、環状扇形屋根部を環状扇形の径方向外側のみで片持ち支持とすることで、環状扇形屋根部の径方向内側の下側空間を解放感に優れたものとしながら、環状扇形屋根部の曲げ応力や先端部の撓みを合理的に抑制することができる技術を提供することができる。
更に、本構成によれば、上記躯体壁は、径方向に延在することで当該径方向の回転抵抗力を有効に発揮することができる。よって、この躯体壁の回転抵抗力により、環状扇形屋根部における複数の主梁の夫々を径方向外側で良好に片持ち支持することができる。
In this configuration, in the annular fan-shaped roof section, multiple main beams are arranged in a circumferential direction, and these multiple main beams are cantilevered on the radially outward side by the support structure. This makes the lower space on the radially inner side of the annular fan-shaped roof section feel more open and free from the presence of the support structure.
Furthermore, in the annular fan-shaped roof section described above, each of the multiple main beams is cantilevered along the radial direction by a support section, extending from the outside inward with a predetermined roof slope, and the inner arc beam and brace are provided. This allows the bending stress and deflection occurring in the main beams to be effectively resisted by the axial force of the inner arc beam through the brace.
Accordingly, the present invention provides a roof structure comprising an annular fan-shaped roof section configured in a plan view and a support section that supports the annular fan-shaped roof section, in which the annular fan-shaped roof section is cantilevered only on the radially outer side of the annular fan, thereby providing a sense of openness in the lower space on the radially inner side of the annular fan-shaped roof section, while rationally suppressing bending stress and deflection at the tip of the annular fan-shaped roof section.
Furthermore, with this configuration, the structural wall extends radially, thereby effectively exerting rotational resistance in that direction. As a result, the rotational resistance of this structural wall allows each of the multiple main beams in the annular fan-shaped roof section to be cantilevered well on the radially outward side.
本発明の実施形態について図面に基づいて説明する。
図１及び図２に示す建物１は、本実施形態の屋根構造（以下「本屋根構造」と呼ぶ。）５０を備える。
本屋根構造５０は、平面視（図１参照）で環状扇形に構成された環状扇形屋根部１０と、当該環状扇形屋根部１０を支持する支持部３０と、を備える。尚、上記環状扇形とは、半径が異なる２つの同心円で囲まれる領域のうち、径方向Ｘに延びる２つの直線で挟まれた部分の形状を示す。
この建物１には、環状扇形屋根部１０の外側（図１の上側、図２の左側）に、同じく平面視で環状扇形に形成された外側屋根部６０が設けられている。そして、この環状扇形屋根部１０と外側屋根部６０の上面に屋根仕上げ材（図示省略）が敷設されている。
Embodiments of the present invention will be described with reference to the drawings.
The building 1 shown in Figures 1 and 2 is equipped with the roof structure 50 of this embodiment (hereinafter referred to as "this roof structure").
The roof structure 50 comprises an annular fan-shaped roof section 10, which is configured in an annular fan shape in a plan view (see Figure 1), and a support section 30 that supports the annular fan-shaped roof section 10. The annular fan shape refers to the shape of the portion enclosed by two straight lines extending in the radial direction X, within a region surrounded by two concentric circles with different radii.
In this building 1, an outer roof section 60, also formed in an annular fan shape in plan view, is provided outside the annular fan-shaped roof section 10 (upper side in Figure 1, left side in Figure 2). Roof finishing material (not shown) is laid on the upper surfaces of the annular fan-shaped roof section 10 and the outer roof section 60.
環状扇形屋根部１０には、上記環状扇形の径方向Ｘに沿って所定の屋根勾配で延在する主梁１２が、上記環状扇形の周方向Ｙに複数並設されている。そして、支持部３０は、環状扇形屋根部１０が有する複数の主梁１２を径方向Ｘの外側（図１の上側、図２の左側）で片持ち支持する支持柱３１を備えて構成されている。
尚、環状扇形屋根部１０の屋根勾配、換言すれば主梁１２の勾配は、径方向Ｘに沿って外側（図１の上側、図２の左側、支持部３０側）から内側（図１の下側、図２の右側、支持部３０とは反対側）に向けて下る内向き下り勾配とされている。
このように、複数の主梁１２が周方向Ｙに並設されており、それら複数の主梁１２が径方向Ｘの外側で支持部３０により片持ち支持されるので、環状扇形屋根部１０の下側空間３（図２参照）における径方向Ｘの内側は、支持部３０が存在しない解放感に優れたものとなる。尚、下側空間３の周囲には、適宜外壁５が設けられている。
The annular fan-shaped roof section 10 has multiple main beams 12 that extend along the radial direction X of the annular fan with a predetermined roof slope, arranged in parallel in the circumferential direction Y of the annular fan. The support section 30 is configured with support columns 31 that cantilever-support the multiple main beams 12 of the annular fan-shaped roof section 10 on the outer side of the radial direction X (upper side in Figure 1, left side in Figure 2).
Furthermore, the roof slope of the annular fan-shaped roof section 10, in other words, the slope of the main beam 12, is an inward downward slope that descends along the radial direction X from the outside (upper side of Figure 1, left side of Figure 2, side of the support section 30) to the inside (lower side of Figure 1, right side of Figure 2, opposite side of the support section 30).
As described above, multiple main beams 12 are arranged in parallel in the circumferential direction Y, and these multiple main beams 12 are cantilevered by support parts 30 on the outside in the radial direction X. Therefore, the inside of the lower space 3 (see Figure 2) of the annular fan-shaped roof section 10 in the radial direction X is free from support parts 30, resulting in a sense of openness. Outer walls 5 are provided around the perimeter of the lower space 3 as appropriate.
環状扇形屋根部１０には、周方向Ｙに沿う略円弧状に延在して複数の主梁１２を連結する内円弧梁１４と中円弧梁１５と外円弧梁１６とが設けられている。
内円弧梁１４は、環状扇形屋根部１０の径方向Ｘでの内側縁部に沿って平面視略円弧状に延在し、複数の主梁１２の夫々の内側端部を接続するものとして構成されている。
中円弧梁１５は、環状扇形屋根部１０の径方向Ｘでの中間部に沿って平面視略円弧状に延在し、複数の主梁１２の夫々の中間部を接続するものとして構成されている。
外円弧梁１６は、環状扇形屋根部１０の径方向Ｘでの外側縁部に沿って平面視略円弧状に延在し、複数の主梁１２の夫々の外側端部を接続するものとして構成されている。
The annular fan-shaped roof section 10 is provided with an inner arc beam 14, a middle arc beam 15, and an outer arc beam 16 that extend in a substantially arc shape along the circumferential direction Y and connect a plurality of main beams 12.
The inner arc beam 14 extends in a substantially arc shape in plan view along the inner edge of the annular fan-shaped roof section 10 in the radial direction X, and is configured to connect the inner ends of each of the multiple main beams 12.
The central arc beam 15 extends in a roughly arc shape in plan view along the intermediate part of the annular fan-shaped roof section 10 in the radial direction X, and is configured to connect the intermediate parts of each of the multiple main beams 12.
The outer arc beam 16 extends in a substantially arc shape in plan view along the outer edge of the annular fan-shaped roof section 10 in the radial direction X, and is configured to connect the respective outer ends of the multiple main beams 12.
環状扇形屋根部１０には、複数の主梁１２の夫々の隣接間に架設されたブレース２０として、第１ブレース２１と第２ブレース２２が設けられている。
即ち、第１ブレース２１は、互いに隣接する一対の主梁１２と内円弧梁１４と中円弧梁１５とに囲まれた架構面の対角線上に架設されている。周方向Ｙに主梁１２を挟んで互いに隣接する一対の第１ブレース２１は、平面視でＶ字状又は逆Ｖ字状となるように設けられている。一方、第２ブレース２２は、互いに隣接する一対の主梁１２と中円弧梁１５と外円弧梁１６とに囲まれた架構面の対角線上に架設されている。周方向Ｙに主梁１２を挟んで互いに隣接する一対の第２ブレース２２は、平面視でＶ字状又は逆Ｖ字状となるように設けられている。
また、径方向Ｘに中円弧梁１５を挟んで互いに隣接する第１ブレース２１及び第２ブレース２２は、平面視でＶ字状又は逆Ｖ字状となるように設けられている。
In the annular fan-shaped roof section 10, a first brace 21 and a second brace 22 are provided as braces 20, which are installed between adjacent main beams 12.
Specifically, the first braces 21 are installed on the diagonal of the frame plane surrounded by a pair of adjacent main beams 12, an inner arc beam 14, and a middle arc beam 15. The pair of first braces 21, adjacent to each other with the main beams 12 in the circumferential direction Y, are arranged to form a V-shape or an inverted V-shape in plan view. On the other hand, the second braces 22 are installed on the diagonal of the frame plane surrounded by a pair of adjacent main beams 12, a middle arc beam 15, and an outer arc beam 16. The pair of second braces 22, adjacent to each other with the main beams 12 in the circumferential direction Y, are arranged to form a V-shape or an inverted V-shape in plan view.
Furthermore, the first brace 21 and the second brace 22, which are adjacent to each other with the central arc beam 15 in the radial direction X, are arranged to form a V-shape or an inverted V-shape in a plan view.
以上のように、本屋根構造５０では、環状扇形屋根部１０において、複数の主梁１２の夫々を、径方向Ｘに沿って支持部３０により片持ち支持される外側から内側に向けて所定の屋根勾配で延在するものとした上で、上述した円弧梁１４，１５，１６及びブレース２０が設けられているので、主梁１２に生じる曲げ応力や撓みを、ブレース２０を通じて円弧梁１４，１５，１６の軸力により好適に抵抗することができる。以下、このような作用効果の詳細を説明するために、本屋根構造５０を模式化した実施例１（図３）と、従来の屋根構造１５０，２５０を模式化した比較例１（図４）及び比較例２（図５）との夫々について説明を加える。
尚、図３～５において、（ａ）は、夫々の屋根構造５０，１５０，２５０を模式化したモデルの正面図、（ｂ）は、同モデルの平面図である。図３～５における二点鎖線は、夫々の屋根構造５０，１５０，２５０の主梁１２，１１２，２１２やブレース２０，１２０，２２０が、鉛直荷重による曲げ応力や撓みによって下方に偏移した状態を示している。
As described above, in this roof structure 50, in the annular fan-shaped roof section 10, each of the multiple main beams 12 is cantilevered along the radial direction X by the support section 30, extending from the outside to the inside with a predetermined roof slope, and the aforementioned arc beams 14, 15, 16 and braces 20 are provided. Therefore, the bending stress and deflection occurring in the main beams 12 can be effectively resisted by the axial force of the arc beams 14, 15, 16 through the braces 20. Below, in order to explain the details of these effects, we will describe Example 1 (Figure 3), which is a schematic representation of this roof structure 50, and Comparative Examples 1 (Figure 4) and 2 (Figure 5), which are schematic representations of conventional roof structures 150 and 250.
In Figures 3-5, (a) is a front view of a schematic model of each roof structure 50, 150, and 250, and (b) is a plan view of the same model. The dashed lines in Figures 3-5 indicate the state in which the main beams 12, 112, and 212 and braces 20, 120, and 220 of each roof structure 50, 150, and 250 are displaced downward due to bending stress and deflection caused by vertical loads.
〔実施例１〕
図３に示す実施例１の本屋根構造５０は、上記実施形態で説明した平面視で環状扇形の環状扇形屋根部１０及び支持部３０を備える。即ち、複数の主梁１２の夫々が、上記環状扇形の周方向Ｙに並設されており、それら夫々の主梁１２が、上記環状扇形の径方向Ｘの外側（図３の左側）で支持部３０により片持ち支持されて径方向Ｘの内側（図３の右側）に向けて下り勾配で跳ね出す状態で設けられている。そして、複数の主梁１２の夫々の径方向Ｘでの内側端部である跳ね出し端部（図３の右側端部）は、環状扇形屋根部１０の径方向Ｘでの内側縁部に沿って平面視略円弧状に延在する内円弧梁１４により接続されており、複数の主梁１２の夫々の隣接間にはブレース２０が架設されている。
[Example 1]
The main roof structure 50 of Embodiment 1 shown in Figure 3 comprises an annular fan-shaped roof section 10 and support section 30, which are annular fan-shaped in plan view, as described in the above embodiment. Specifically, each of the multiple main beams 12 is arranged in the circumferential direction Y of the annular fan, and each of these main beams 12 is cantilevered by the support section 30 on the outside of the radial direction X of the annular fan (left side in Figure 3) and is provided in a state where it cantilevers downward toward the inside of the radial direction X (right side in Figure 3). The cantilevered ends (right end in Figure 3), which are the inner ends of each of the multiple main beams 12 in the radial direction X, are connected by an inner arc beam 14 that extends in a substantially arc shape in plan view along the inner edge of the annular fan-shaped roof section 10 in the radial direction X, and braces 20 are installed between each adjacent of the multiple main beams 12.
このように構成された実施例１の本屋根構造５０では、二点鎖線で示すように、内円弧梁１４に接続された主梁１２の跳ね出し端部（内円弧梁１４への接続端部）が鉛直荷重により鉛直方向に撓むと、互いに隣接する２つの主梁１２の跳ね出し端部間の距離がＬ１４からＬ１４ａに拡大する。すると、内円弧梁１４やブレース２０には、その跳ね出し端部間の距離の拡大に抵抗する形態で引張力が生じる。よって、夫々の主梁１２の跳ね出し端部の撓みが、内円弧梁１４やブレース２０の引張力により好適に抵抗され合理的に抑制される。 In the main roof structure 50 of Embodiment 1, as configured as shown by the dashed line, when the cantilevered end (the end connected to the inner arc beam 14) of the main beam 12 connected to the inner arc beam 14 deflects vertically due to a vertical load, the distance between the cantilevered ends of two adjacent main beams 12 expands from L14 to L14a. This generates tensile forces in the inner arc beam 14 and the brace 20 in a manner that resists the expansion of the distance between the cantilevered ends. Therefore, the deflection of the cantilevered end of each main beam 12 is effectively resisted and rationally suppressed by the tensile forces in the inner arc beam 14 and the brace 20.
〔比較例１〕
図４に示す比較例１の屋根構造１５０は、平面視で直線状の第１水平方向Ｙ’に延びる矩形帯状の屋根部１１０を備える点で上記実施例１とは異なる。即ち、複数の主梁１１２の夫々が、上記第１水平方向Ｙ’に並設されており、それら夫々の主梁１１２が、平面視で上記第１水平方向Ｙ’と直交する第２水平方向Ｘ’の一方側（図４の左側）で支持部１３０により片持ち支持されて第２水平方向Ｘ’の他方側（図４の右側）に向けて下り勾配で跳ね出す状態で設けられている。そして、複数の主梁１１２の夫々の第２水平方向Ｘ’での内側端部である跳ね出し端部（図４の右側端部）は、屋根部１１０の第２水平方向Ｘ’での他方側縁部に沿って第１水平方向Ｙ’に延在する内梁１１４により接続されており、複数の主梁１２の夫々の隣接間にはブレース１２０が架設されている。
[Comparative Example 1]
The roof structure 150 of Comparative Example 1 shown in Figure 4 differs from Embodiment 1 in that it has a rectangular strip-shaped roof section 110 that extends in a straight first horizontal direction Y' in a plan view. Specifically, each of the multiple main beams 112 is arranged in parallel in the first horizontal direction Y', and each of these main beams 112 is cantilevered by a support section 130 on one side (left side in Figure 4) of the second horizontal direction X' which is perpendicular to the first horizontal direction Y' in a plan view, and is provided in a state where it cantilevers downward toward the other side (right side in Figure 4) of the second horizontal direction X'. The cantilevered ends (right end in Figure 4), which are the inner ends of each of the multiple main beams 112 in the second horizontal direction X', are connected by an inner beam 114 that extends in the first horizontal direction Y' along the other side edge of the roof section 110 in the second horizontal direction X', and braces 120 are installed between each adjacent of the multiple main beams 12.
このように構成された比較例１の本屋根構造１５０では、二点鎖線で示すように、内梁１１４に接続された主梁１１２の跳ね出し端部（内梁１１４への接続端部）が鉛直荷重により鉛直方向に撓んでも、互いに隣接する２つの主梁１１２の跳ね出し端部間の距離がＬ１１４のまま変化しない。よって、上記実施例１とは異なり、内梁１１４やブレース１２０に引張力は生じることはなく、その引張力により夫々の主梁１２の跳ね出し端部の撓みを抑制することはできない。 In the main roof structure 150 of Comparative Example 1, as configured in this way, even if the cantilevered end (the end connected to the inner beam 114) of the main beam 112 connected to the inner beam 114 deflects vertically due to a vertical load, as shown by the dashed line, the distance between the cantilevered ends of two adjacent main beams 112 remains unchanged at L114. Therefore, unlike in Example 1, no tensile force is generated in the inner beam 114 or the brace 120, and this tensile force cannot suppress the deflection of the cantilevered ends of each main beam 12.
〔比較例２〕
図５に示す比較例１の屋根構造２５０は、複数の主梁２１２の夫々が水平に跳ね出す状態で設けられている点で、上記実施例１とは異なる。即ち、複数の主梁２１２の夫々が、上記環状扇形の周方向Ｙに並設されており、それら夫々の主梁２１２が、上記環状扇形の径方向Ｘの外側（図５の左側）で支持部３０により片持ち支持されて径方向Ｘの内側（図５の右側）に向けて水平に跳ね出す状態で設けられている。そして、複数の主梁１２の夫々の径方向Ｘでの内側端部である跳ね出し端部（図５の右側端部）は、環状扇形屋根部１０の径方向Ｘでの内側縁部に沿って平面視略円弧状に延在する内円弧梁２１４により接続されており、複数の主梁２１２の夫々の隣接間にはブレース２２０が架設されている。
[Comparative Example 2]
The roof structure 250 of Comparative Example 1 shown in Figure 5 differs from Embodiment 1 in that each of the multiple main beams 212 is provided in a state where it cantilevers horizontally. Specifically, each of the multiple main beams 212 is arranged in parallel in the circumferential direction Y of the annular fan shape, and each of these main beams 212 is cantilevered by a support part 30 on the outside of the radial direction X of the annular fan shape (left side in Figure 5) and is provided in a state where it cantilevers horizontally toward the inside of the radial direction X (right side in Figure 5). The cantilevered ends (right end in Figure 5), which are the inner ends of each of the multiple main beams 12 in the radial direction X, are connected by an inner arc beam 214 that extends in a substantially arc shape in plan view along the inner edge of the annular fan-shaped roof section 10 in the radial direction X, and braces 220 are installed between each adjacent of the multiple main beams 212.
このように構成された比較例１の本屋根構造２５０では、二点鎖線で示すように、内円弧梁２１４に接続された主梁２１２の跳ね出し端部（内円弧梁２１４への接続端部）が鉛直荷重により鉛直方向に撓むと、互いに隣接する２つの主梁２１２の跳ね出し端部間の距離がＬ２１４からＬ２１４ａに拡大するが、その拡大幅はほとんど０に等しい。よって、上記実施例１とは異なり、内円弧梁１４やブレース２０に生じる引張力は僅かであり、その引張力により夫々の主梁１２の跳ね出し端部の撓みを抑制することは殆どできない。 In the main roof structure 250 of Comparative Example 1, as configured in this way, as shown by the dashed line, when the cantilevered end (the end connected to the inner arc beam 214) of the main beam 212 connected to the inner arc beam 214 deflects vertically due to a vertical load, the distance between the cantilevered ends of two adjacent main beams 212 expands from L214 to L214a, but the extent of this expansion is almost zero. Therefore, unlike in Example 1, the tensile force generated in the inner arc beam 14 and the brace 20 is minimal, and this tensile force is hardly able to suppress the deflection of the cantilevered ends of each main beam 12.
次に、図１及び図２を参照して、本屋根構造５０が備える更なる特徴構成について説明を加える。
上記支持部３０としては、上記複数の主梁１２の夫々に対して、当該主梁１２の外側端部が固定されて下方に延びる支持柱３１が設けられている。複数の支持柱３１の夫々の下端部は、平面視で円弧状に延びる支持梁３５で連結されている。複数の主梁１２のうち１つ置きの主梁１２の下方側の夫々には、環状扇形の径方向Ｘに延在する鉄筋コンクリート造の躯体壁３２が設けられており、上記支持梁３５の下方部分を躯体壁３２の上端部分に埋設させる形態で、当該支持梁３５が躯体壁３２に定着されている。即ち、環状扇形屋根部１０の下方に配置されて環状扇形の径方向Ｘに延在する躯体壁３２が支持部３０として設けられている。
このような構成により、躯体壁３２は、径方向Ｘに延在することで当該径方向Ｘの回転抵抗力を有効に発揮することができる。よって、この躯体壁３２の回転抵抗力により、環状扇形屋根部１０における複数の主梁１２の夫々を径方向Ｘ外側で良好に片持ち支持することができる。
Next, with reference to Figures 1 and 2, we will explain further features of the roof structure 50.
As the support section 30, a support column 31 is provided for each of the multiple main beams 12, with the outer end of the main beam 12 fixed to it and extending downward. The lower ends of each of the multiple support columns 31 are connected by a support beam 35 that extends in an arc shape in a plan view. Below every other main beam 12, a reinforced concrete structural wall 32 extending in the radial direction X of an annular fan shape is provided, and the support beam 35 is fixed to the structural wall 32 in such a way that its lower portion is embedded in the upper end portion of the structural wall 32. In other words, a structural wall 32 positioned below the annular fan-shaped roof section 10 and extending in the radial direction X of an annular fan shape is provided as the support section 30.
With this configuration, the structural wall 32 extends in the radial direction X, thereby effectively exerting rotational resistance in that radial direction X. As a result, the rotational resistance of this structural wall 32 allows each of the multiple main beams 12 in the annular fan-shaped roof section 10 to be cantilevered well on the radially outward side X.
一方、建物１において、環状扇形屋根部１０の外側に設けられた外側屋根部６０には、径方向Ｘに沿って所定の屋根勾配で延在する主梁６２が周方向Ｙに複数並設されている。尚、この外側屋根部６０が有する複数の主梁６２の夫々と、上述した環状扇形屋根部１０が有する複数の主梁１２の夫々とは、平面視で径方向Ｘに沿って直線上に配置されている。
そして、外側屋根部６０が有する複数の主梁６２の夫々は、支持柱３１の上端部と躯体壁３２の外側上縁部との間に架設される形態で支持されている。
外側屋根部６０の屋根勾配、換言すれば主梁６２の勾配は、径方向Ｘに沿って内側（図１の下側、図２の右側、支持部３０側）から外側（図１の上側、図２の左側、支持部３０側とは反対側）に向けて下る外向き下り勾配とされている。
On the other hand, in building 1, the outer roof section 60, which is provided on the outside of the annular fan-shaped roof section 10, has multiple main beams 62 arranged in parallel in the circumferential direction Y, extending along the radial direction X with a predetermined roof slope. In plan view, each of the multiple main beams 62 of this outer roof section 60 and each of the multiple main beams 12 of the annular fan-shaped roof section 10 are arranged in a straight line along the radial direction X.
Furthermore, each of the multiple main beams 62 of the outer roof section 60 is supported in a manner that it is installed between the upper end of the support column 31 and the outer upper edge of the structural wall 32.
The roof slope of the outer roof section 60, or in other words, the slope of the main beam 62, is an outward downward slope that descends along the radial direction X from the inside (lower side in Figure 1, right side in Figure 2, support section 30 side) to the outside (upper side in Figure 1, left side in Figure 2, opposite side to support section 30 side).
外側屋根部６０には、複数の主梁６２の夫々の隣接間に架設された外側ブレース２３が設けられている。
即ち、外側ブレース２３は、互いに隣接する一対の主梁６２と外円弧梁１６に囲まれた架構面の対角線上に架設されている。周方向Ｙに主梁６２を挟んで互いに隣接する一対の外側ブレース２３は、平面視でＶ字状又は逆Ｖ字状となるように設けられている。
また、径方向Ｘに外円弧梁１６を挟んで互いに隣接する外側ブレース２３及び第２ブレース２２は、平面視でＶ字状又は逆Ｖ字状となるように設けられている。
The outer roof section 60 is provided with outer braces 23 that are installed between adjacent main beams 62.
In other words, the outer braces 23 are installed on the diagonals of the frame plane surrounded by a pair of adjacent main beams 62 and an outer arc beam 16. The pair of outer braces 23, which are adjacent to each other with the main beams 62 in the circumferential direction Y, are arranged to form a V-shape or an inverted V-shape in plan view.
Furthermore, the outer braces 23 and second braces 22, which are adjacent to each other with the outer arc beam 16 in the radial direction X, are arranged to form a V-shape or an inverted V-shape in a plan view.
〔別実施形態〕
本発明の他の実施形態について説明する。尚、以下に説明する各実施形態の構成は、それぞれ単独で適用することに限らず、他の実施形態の構成と組み合わせて適用することも可能である。
[Another embodiment]
Other embodiments of the present invention will now be described. Note that the configurations of each embodiment described below are not limited to being applied individually, but can also be applied in combination with the configurations of other embodiments.
（１）上記実施形態では、環状扇形屋根部１０の屋根勾配、即ち夫々の主梁１２の勾配を、径方向Ｘに沿って支持部３０により片持ち支持された外側から内側に向けて下る内向き下り勾配としたが、径方向Ｘに沿って支持部３０により片持ち支持された外側から内側に向けて上る内向き上り勾配としても構わない。その場合、互いに隣接する２つの主梁の跳ね出し端部間の距離が、当該主梁の撓みに伴って縮小する。すると、複数の主梁の跳ね出し端部を連結する内円弧梁や複数の主梁の夫々の隣接間に架設されたブレースには、その跳ね出し端部間の距離の縮小に抵抗する形態で圧縮力が生じる。よって、夫々の主梁の跳ね出し端部の撓みが、内円弧梁やブレースの圧縮力により好適に抵抗され合理的に抑制されることになる。 (1) In the above embodiment, the roof slope of the annular fan-shaped roof section 10, that is, the slope of each main beam 12, was set as an inward downward slope, descending from the outside to the inside, cantilevered by the support section 30 along the radial direction X. However, it may also be set as an inward upward slope, ascending from the outside to the inside, cantilevered by the support section 30 along the radial direction X. In that case, the distance between the cantilevered ends of two adjacent main beams decreases as the main beams deflect. Then, a compressive force is generated in the inner arc beam connecting the cantilevered ends of the multiple main beams and in the braces installed between each adjacent main beam, in a manner that resists the reduction in the distance between the cantilevered ends. Therefore, the deflection of the cantilevered ends of each main beam is suitably resisted and rationally suppressed by the compressive force of the inner arc beam and braces.
（２）上記実施形態では、環状扇形屋根部１０の下方に配置されて径方向Ｘに延在する躯体壁３２を、環状扇形屋根部１０が有する主梁１２を環状扇形の径方向Ｘ外側で片持ち支持する支持部３０として備えたが、例えば支持柱３１を基礎に直接固定して当該支持柱３１のみで主梁１２を片持ち支持するように構成するなど、別の形態の支持部３０を採用しても構わない。 (2) In the above embodiment, the structural wall 32, positioned below the annular fan-shaped roof section 10 and extending radially X, is provided as a support section 30 that cantilever-supports the main beam 12 of the annular fan-shaped roof section 10 on the radially X-outside side of the annular fan. However, other forms of support sections 30 may be adopted, such as directly fixing a support column 31 to the foundation and cantilever-supporting the main beam 12 solely by the support column 31.
（３）上記実施形態では、環状扇形屋根部１０において多くの主梁１２を径方向Ｘに添わせて並設したが、この主梁１２の数は適宜変更可能であり、少なくとも２つの主梁が並設されていれば良い。また、上記実施形態では、環状扇形屋根部１０の周方向Ｙでの両端部に別の屋根を設けずに、建物１の屋根部全体が平面視で環状扇形となるように構成したが、例えば環状扇形屋根部１０の周方向Ｙでの両端部の少なくとも一方に別の形状の屋根部を連接させて、建物１の屋根部全体が平面視で環状扇形とならないように構成することもできる。 (3) In the above embodiment, many main beams 12 were arranged in parallel along the radial direction X in the annular fan-shaped roof section 10. However, the number of these main beams 12 can be changed as appropriate; it is sufficient to have at least two main beams arranged in parallel. Furthermore, in the above embodiment, no other roofs were provided at either end of the annular fan-shaped roof section 10 in the circumferential direction Y, so that the entire roof section of the building 1 was an annular fan shape in plan view. However, for example, a roof section of a different shape could be connected to at least one end of the annular fan-shaped roof section 10 in the circumferential direction Y, so that the entire roof section of the building 1 is not an annular fan shape in plan view.
１０ 環状扇形屋根部
１２ 主梁
１４ 内円弧梁
２０ ブレース
２１ 第１ブレース
２２ 第２ブレース
３０ 支持部
３１ 支持柱（支持部）
３２ 躯体壁（支持部）
３５ 支持梁（支持部）
５０ 屋根構造
Ｘ 径方向
Ｙ 周方向
10 Annular fan-shaped roof section 12 Main beam 14 Inner arc beam 20 Brace 21 First brace 22 Second brace 30 Support section 31 Support column (support section)
32 Structure wall (support part)
35 Support beam (support part)
50 Roof structure X Radial direction Y Circumferential direction
Claims (2)
前記環状扇形屋根部が、前記環状扇形の径方向に所定の屋根勾配で延在する主梁を前記環状扇形の周方向に複数並設して有すると共に、
前記支持部が、前記環状扇形屋根部が有する複数の主梁を前記環状扇形の径方向外側で片持ち支持するものとして構成されており、
前記環状扇形屋根部が、前記環状扇形の径方向内側縁部に沿って略円弧状に延在して前記複数の主梁の夫々の内側端部が接続された内円弧梁と、前記複数の主梁の夫々の隣接間に架設されたブレースと、を有し、
前記屋根勾配が、前記環状扇形の径方向外側から前記環状扇形の径方向内側に向けて下る内向き下り勾配である屋根構造。 A roof structure comprising an annular fan-shaped roof section configured in an annular fan shape in plan view, and a support section that supports the annular fan-shaped roof section,
The annular fan-shaped roof section has a plurality of main beams arranged in parallel in the circumferential direction of the annular fan, extending in the radial direction of the annular fan with a predetermined roof slope,
The support portion is configured to cantilever support the multiple main beams of the annular fan-shaped roof portion on the radially outer side of the annular fan shape.
The annular fan-shaped roof section comprises an inner arc beam that extends in a substantially arc shape along the radial inner edge of the annular fan and to which the inner ends of each of the plurality of main beams are connected, and braces that are installed between adjacent members of the plurality of main beams.
A roof structure in which the roof slope is an inward downward slope that descends from the radially outer side of the annular fan shape toward the radially inner side of the annular fan shape.
前記環状扇形屋根部が、前記環状扇形の径方向に所定の屋根勾配で延在する主梁を前記環状扇形の周方向に複数並設して有すると共に、
前記支持部が、前記環状扇形屋根部が有する複数の主梁を前記環状扇形の径方向外側で片持ち支持するものとして構成されており、
前記環状扇形屋根部が、前記環状扇形の径方向内側縁部に沿って略円弧状に延在して前記複数の主梁の夫々の内側端部が接続された内円弧梁と、前記複数の主梁の夫々の隣接間に架設されたブレースと、を有し、
前記環状扇形屋根部の下方に配置されて前記環状扇形の径方向に延在する躯体壁を前記支持部として備えた屋根構造。
A roof structure comprising an annular fan-shaped roof section configured in an annular fan shape in plan view, and a support section that supports the annular fan-shaped roof section,
The annular fan-shaped roof section has a plurality of main beams arranged in parallel in the circumferential direction of the annular fan, extending in the radial direction of the annular fan with a predetermined roof slope,
The support portion is configured to cantilever support the multiple main beams of the annular fan-shaped roof portion on the radially outer side of the annular fan shape.
The annular fan-shaped roof section comprises an inner arc beam that extends in a substantially arc shape along the radial inner edge of the annular fan and to which the inner ends of each of the plurality of main beams are connected, and braces that are installed between adjacent members of the plurality of main beams.
A roof structure comprising a structural wall positioned below the annular fan-shaped roof section and extending radially in the annular fan shape , which serves as the support section.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2017122334A (en) | 2016-01-06 | 2017-07-13 | 株式会社竹中工務店 | Roof structure |
| JP2021059908A (en) | 2019-10-08 | 2021-04-15 | 戸田建設株式会社 | Large-space structure and method for constructing the same |
| US20210388601A1 (en) | 2018-10-01 | 2021-12-16 | Lm Techs.R.L. | Building structure with independently cantilevered stories |
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| JPH06313338A (en) * | 1993-04-30 | 1994-11-08 | Shiro Kato | Roof structure and its construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2017122334A (en) | 2016-01-06 | 2017-07-13 | 株式会社竹中工務店 | Roof structure |
| US20210388601A1 (en) | 2018-10-01 | 2021-12-16 | Lm Techs.R.L. | Building structure with independently cantilevered stories |
| JP2021059908A (en) | 2019-10-08 | 2021-04-15 | 戸田建設株式会社 | Large-space structure and method for constructing the same |
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