JP5902343B1 - String string structure - Google Patents

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JP5902343B1
JP5902343B1 JP2015206235A JP2015206235A JP5902343B1 JP 5902343 B1 JP5902343 B1 JP 5902343B1 JP 2015206235 A JP2015206235 A JP 2015206235A JP 2015206235 A JP2015206235 A JP 2015206235A JP 5902343 B1 JP5902343 B1 JP 5902343B1
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upper chord
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beam structure
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tension
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JP2017078284A (en
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高志 倉田
高志 倉田
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Nippon Steel Engineering Co Ltd
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Abstract

【課題】張弦梁構造を採用しながら、屋根架構の構造部材数をより低減し、かつ部材をスリム化することで意匠性を向上させることのできる張弦梁構造体を提供すること。【解決手段】妻行き方向の複数の第1の上弦材1と桁行き方向の複数の第2の上弦材2が交互に直交して複数の格点3を形成し、全ての格点3のうちの幾つかの格点3から鉛直方向に束材4Aが垂下され、平面的に見て妻行き方向および桁行き方向以外の斜め方向に延びる引張材5が、束材4Aの下端と束材4Aが垂下されていない格点3の間に架け渡されている、屋根架構10を備えている、張弦梁構造体30である。【選択図】図1To provide a stringed beam structure capable of improving the design by reducing the number of structural members of a roof frame and making the members slim while adopting a stringed beam structure. A plurality of first upper chord members 1 in the direction of the wife and a plurality of second upper chord members 2 in the direction of the girder are alternately orthogonally formed to form a plurality of grades 3, A bundle member 4A is suspended vertically from some of the rating points 3, and a tensile member 5 extending in an oblique direction other than the wobbling direction and the girder direction as viewed in plan is a lower end of the bundle member 4A and the bundle member. 4A is a stringed beam structure 30 provided with a roof frame 10 that is spanned between grades 3 that are not suspended. [Selection] Figure 1

Description

本発明は、屋根架構に特徴のある張弦梁構造体に関するものである。   The present invention relates to a stringed string structure characterized by a roof frame.

アリーナや体育館等の大空間構造物の屋根架構には、張弦梁構造体が一般に適用されており、たとえば特許文献1にも張弦梁構造体を屋根架構に適用してなるX型交差張弦梁構造体が開示されている。   A stringed string structure is generally applied to a roof frame of a large space structure such as an arena or a gymnasium. For example, Patent Document 1 discloses an X-type cross stringed beam structure formed by applying a stringed beam structure to a roof frame. Has been.

特許文献1で開示されるX型交差張弦梁構造体は、以下の構成からなるものである。すなわち、平面視矩形状をなす大型建築物の屋根面の骨組み構造であって、上弦材、下弦材、方杖材及び上弦巾止小梁から構成され、上弦材はアーチ状をなしており、その各両端部はスパン方向筋向いの支持体の上端部に亘って架設されるとともに各上弦材はその中央部でX状に交差結合され、各隣り合う上弦材の端部は支持体上端部の同一箇所に固定されている。下弦材は対向する支持体上端部における上弦材固定部間に亘って張設され、方杖材は下弦材に沿って所定間隔ごとに配置され、隣り合う上弦材と下弦材間に張設され、上弦巾止小梁は隣り合う上弦材間に張設されている。   The X-type crossed string beam structure disclosed in Patent Document 1 has the following configuration. That is, it is a framework structure of the roof surface of a large building that has a rectangular shape in plan view, and is composed of an upper chord material, a lower chord material, a cane material, and an upper chord stop beam, and the upper chord material has an arch shape, Each end of the upper chord material is constructed over the upper end of the support facing the span direction and each upper chord material is cross-coupled in an X shape at the center, and the end of each adjacent upper chord material is the upper end portion of the support body. Are fixed in the same place. The lower chord material is stretched between the upper chord material fixing portions at the upper ends of the opposing supports, and the cane material is arranged at predetermined intervals along the lower chord material, and is stretched between the adjacent upper chord material and the lower chord material. The upper chord stop beam is stretched between adjacent upper chord members.

このX型交差張弦梁構造体によれば、立体交差梁と張弦構造を併用することにより、水平面の剛性の確保が良好であり、組立作業を安全かつ容易に行えるとしている。   According to the X-type crossed string beam structure, the use of the three-dimensional cross beam and the stringed structure makes it possible to secure the rigidity of the horizontal plane and to perform the assembly work safely and easily.

特許文献1に開示される張弦梁構造体を含め、通常の張弦梁構造体は一般に、主として上弦材と束材、および引張材(テンション材)から構成され、屋根荷重等による鉛直力を引張材で負担し、地震時水平力を屋根面内のブレス材で負担するようにしている。   The ordinary string beam structure including the string beam structure disclosed in Patent Document 1 is generally composed mainly of an upper chord material, a bundle material, and a tension material (tension material), and bears a vertical force due to a roof load or the like with the tension material. The horizontal force during an earthquake is borne by the brace material on the roof.

特開2004−263383号公報JP 2004-263383 A

上記する従来の張弦梁構造体では、特に地震時水平力を負担する多数のブレス材を必須の構成とすることから、張弦梁構造体を構成する部材数が多くなり、意匠的にも煩雑な印象を与えることは否めない。   In the conventional stringed beam structure described above, a number of members constituting the stringed beam structure are increased because a large number of brace materials that bear the horizontal force during an earthquake are essential, and the design is complicated. I cannot deny it.

本発明は上記する問題に鑑みてなされたものであり、張弦梁構造を採用しながら、屋根架構の構造部材数を低減し、かつ部材をスリム化することで意匠性を向上させることのできる張弦梁構造体を提供することを目的としている。   The present invention has been made in view of the above-mentioned problems, and while adopting a stringed beam structure, the number of structural members of the roof frame can be reduced and the design can be improved by slimming the members. The purpose is to provide a body.

前記目的を達成すべく、本発明による張弦梁構造体は、妻行き方向の複数の第1の上弦材と桁行き方向の複数の第2の上弦材が交互に直交して複数の格点を形成し、全ての格点のうちの幾つかの格点から鉛直方向に束材が垂下され、平面的に見て妻行き方向および桁行き方向以外の斜め方向に延びる引張材が、束材の下端と束材が垂下されていない格点の間に架け渡されている、屋根架構を備えているものである。   In order to achieve the above-mentioned object, the stringed string structure according to the present invention has a plurality of first upper chord members in the direction of wives and a plurality of second upper chord members in the direction of girder, alternately forming a plurality of grades. However, the bundle member is suspended vertically from some of all the score points, and the tensile member extending in an oblique direction other than the wobbling direction and the girder direction as viewed in plan is the lower end of the bundle material. It is equipped with a roof frame that spans between the grades where the bundle is not suspended.

本発明の張弦梁構造体は、その構成要素である屋根架構の具備する引張材(テンション材)が、平面的に見た際に妻行き方向と桁行き方向以外の斜め方向に配設されていることに加えて、側面視でも斜め方向に配設されている点に一つの特徴を有している。   In the stringed beam structure according to the present invention, the tensile material (tension material) of the roof frame, which is a constituent element thereof, is disposed in an oblique direction other than the wavy direction and the girder direction when viewed in plan. In addition, it also has one feature in that it is arranged in an oblique direction when viewed from the side.

この平面視および側面視において斜め方向に延設する引張材により、鉛直荷重と地震時水平荷重の双方を引張材が負担することが可能になる。なお、ここで、「平面的に見て」、「平面視」とは、張弦梁構造体をその上方から見た場合を意味しており、「側面視」とは、張弦梁構造体をその側方(妻行き方向や桁行き方向)から見た場合を意味している。   The tensile material extending in an oblique direction in the plan view and the side view enables the tensile material to bear both a vertical load and a horizontal load during an earthquake. Here, “viewed in plan” and “plan view” mean the case where the stringed beam structure is viewed from above, and “side view” means the side of the stringed beam structure. It means when viewed from the direction of the wife or the direction of girder.

張弦梁構造体において特に側面視で斜め方向の引張材を採用したことで、この引張材が斜め方向ゆえに、屋根架構等の死荷重等による鉛直力を負担する成分と地震時水平力を負担する成分の二方向の成分を有することから、従来の張弦梁構造体のように屋根面内の水平ブレス材を不要とすることができ、部材数の大幅な低減を図ることが可能になる。   By using a tensile material in the diagonal direction, especially in the side view, in the stringed beam structure, because this tensile material is in the diagonal direction, the component that bears the vertical force due to dead load etc. of the roof frame and the component that bears the horizontal force during earthquake Therefore, it is possible to eliminate the need for a horizontal brace material in the roof surface as in the conventional stringed beam structure, and to significantly reduce the number of members.

そして、この部材数の大幅な低減により、張弦梁構造体をスリム化することができ、このことによって意匠性を向上させることができる。なお、この「部材数の低減」とは、文字通り部材の数を低減することのみならず、部材の寸法を小さくすることをも含んでいる。   And the stringed beam structure can be slimmed by this significant reduction in the number of members, and thereby the design can be improved. The “reducing the number of members” includes literally reducing the number of members as well as reducing the size of the members.

なお、平面的に見た際に妻行き方向と桁行き方向以外の斜め方向に引張材が配設された構造に関し、アーチ構造体ではこのような構造は従来にも存在するが、張弦梁構造体に斜め方向の引張材を適用した構造は従来には存在しない。   In addition, regarding the structure in which the tensile material is arranged in an oblique direction other than the wobbling direction and the girder direction when viewed in a plan view, such a structure exists in the arch structure in the past, but the stringed beam structure Conventionally, there is no structure in which an oblique tensile material is applied.

このように張弦梁構造に対して斜め方向の引張材を適用する技術思想は、張弦梁構造にテンセグリティ構造(張力複合体構造)の要素を取り入れる技術思想とも言える。   Thus, the technical idea of applying an oblique tension material to the stringed beam structure can be said to be a technical idea of incorporating an element of a tensegrity structure (tensile composite structure) into the stringed beam structure.

テンセグリティ構造とは、圧縮部材と引張部材を組み合わせて一つのユニットを構成し、このユニットに外力を付与した際にユニットが変形しながらもユニット構造を保持する構造のことであり、構造部材は細い棒部材やロープ等から構成されるのが一般的である。   The tensegrity structure is a structure in which a compression member and a tension member are combined to form a single unit, and when the external force is applied to this unit, the unit structure is retained while the unit is deformed. Generally, it is composed of a rod member, a rope or the like.

平面視的にも側面視的にも斜め方向(三次元的に斜め方向)の引張材を適用したことで、妻行き方向の複数の第1の上弦材と桁行き方向の複数の第2の上弦材、これら二種類の上弦材の格点から垂下された束材と合わせて、テンセグリティ構造が構成されると言える。   By applying a tensile material in an oblique direction (three-dimensional oblique direction) both in plan view and in side view, a plurality of first upper chord materials in the wives direction and a plurality of second chords in the girder direction It can be said that the tensegrity structure is formed by combining the upper chord material and the bundle material suspended from the rating points of these two kinds of upper chord materials.

本発明の張弦梁構造体は、屋根架構と、屋根架構を支持する柱材や柱材−柱材間に配設された鉛直ブレス材等から構成される鉛直架構から構成される。   The stringed string structure of the present invention is composed of a vertical frame composed of a roof frame, a column material supporting the roof frame, a vertical brace material disposed between the column material and the column material, and the like.

そして、本明細書において「屋根架構」とは、文字通りの屋根架構のほかにも、たとえば二階建ての建築物における二階の床スラブ等も含んでいる。   In the present specification, the “roof frame” includes, in addition to the literal roof frame, for example, a two-story floor slab in a two-story building.

第1の上弦材、第2の上弦材および束材は、鋼製の丸パイプや角パイプなどから形成でき、引張材は、構造用ケーブル、PC鋼線等のPC鋼材などから形成できる。   The first upper chord material, the second upper chord material and the bundle material can be formed from a steel round pipe or square pipe, and the tensile material can be formed from a structural cable, a PC steel material such as a PC steel wire, or the like.

複数の第1の上弦材、第2の上弦材の交差により、格点は多数形成され得るが、その中で、束材は所定のスパン離れた各格点に垂下される。たとえば、平面視で2つのグリッドに跨るピッチ(1つのグリッドは4つの格点から構成される)で束材を格点に垂下させることができる。   A large number of rating points can be formed by the intersection of the plurality of first upper chord materials and the second upper chord material, in which the bundle material is suspended at each rating point separated by a predetermined span. For example, the bundle can be suspended from the score at a pitch (one grid is composed of four rating points) across two grids in plan view.

また、束材の下端と束材が垂下されていない格点の間に引張材が架け渡される架け渡し態様も、たとえば、束材の垂下された格点の隣りの格点(他の束材が垂下されていない格点)に架け渡される形態や、束材の垂下された格点から2つのグリッド離れた格点(他の束材が垂下されていない格点)に架け渡される形態などを適用できる。なお、束材の下端と束材が垂下されていない格点の間に架け渡された引張材の長さが長くなる場合は、その途中の格点から短尺の束材を垂下させ、引張材の途中位置をこの短尺の束材で支持させるのが好ましい。   In addition, for example, a tension mode in which a tensile material is bridged between a lower end of a bundle member and a grade where the bundle member is not suspended is also, for example, a grade adjacent to the grade where the bundle member is suspended (other bundle members). A form that is bridged to a rating point that is not suspended), a form that is spanned to a score that is two grids away from a score that is suspended from a bundle (a score that is not suspended from another bundle), etc. Can be applied. In addition, when the length of the tension material spanned between the lower end of the bundle material and the grade where the bundle material is not suspended becomes long, the short bundle material is suspended from the middle grade, and the tensile material It is preferable to support the middle position of this with this short bundle.

引張材に張力が作用すると、この引張材によって束材が上方に突き上げられ、この束材の突き上げによって上弦材の格点に支点が形成される。そして、このように形成された支点と、既に柱材等で支持された格点(支点)の間において、別途の束材が引張材で上方に突き上げられて形成された格点に別途の支点がさらに形成され、このような支点の形成が繰り返されることで、複数の格点に幾つかの支点が形成されていく。   When tension acts on the tensile material, the bundle material is pushed upward by the tensile material, and a fulcrum is formed at the grade of the upper chord material by pushing up the bundle material. And, between the fulcrum formed in this way and the rating point (fulcrum) already supported by the pillar material etc., a separate bundle material is pushed upward with a tensile material and the additional fulcrum is formed. Are further formed, and by repeating the formation of such fulcrum, several fulcrum points are formed at a plurality of rating points.

このように複数の支点が形成されることで上弦材のスパン(支点間距離)を短くすることが可能になる。上弦材の支点間距離が短くなることにより、上弦材に作用する曲げモーメントが低減することから、上弦材の梁高を可及的に低くすることができ、使用する上弦材の小体格化を図ることができる。このような使用部材の小体格化によっても、屋根架構構成部材のスリム化に繋がる。   By forming a plurality of fulcrums in this way, it becomes possible to shorten the span (distance between fulcrums) of the upper chord material. By shortening the distance between the fulcrum of the upper chord material, the bending moment acting on the upper chord material is reduced, so the beam height of the upper chord material can be made as low as possible, and the upper chord material to be used can be made smaller. Can be planned. Such downsizing of the member in use also leads to slimming of the roof frame component.

以上の説明から理解できるように、本発明の張弦梁構造体によれば、その構成要素である屋根架構に、平面視的にも側面視的にも斜め方向(三次元的に斜め方向)の引張材を適用したことにより、この引張材が鉛直荷重と地震時水平荷重の双方を負担することができ、このことによって従来の張弦梁構造体が具備する屋根面内の水平ブレス材を不要とすることができる。このように水平ブレス材を不要とすることで部材数の大幅な低減を図ることができ、このことが張弦梁構造のスリム化に繋がり、このスリム化によって意匠性を向上させることができる。   As can be understood from the above description, according to the stringed beam structure of the present invention, the roof frame, which is a constituent element, is stretched in an oblique direction (three-dimensionally oblique direction) both in plan view and in side view. By applying the material, this tensile material can bear both vertical load and horizontal load at the time of earthquake, and this eliminates the need for horizontal brace material in the roof surface of the conventional stringed beam structure Can do. By eliminating the need for the horizontal brace material in this way, the number of members can be greatly reduced. This leads to slimming of the stringed beam structure, and the design can be improved by this slimming.

本発明の張弦梁構造体の実施の形態を説明した斜視図である。It is the perspective view explaining embodiment of the stringed beam structure of this invention. (a)は図2(c)のa−a矢視図であって張弦梁構造体の妻面から見た側面軸組図であり、(b)は図2(a)のb−b矢視図であって張弦梁構造体の第1、第2の上弦材を示した平面軸組図であり、(c)は図2(a)のc−c矢視図であって張弦梁構造体の引張材を示した平面軸組図であり、(d)は図2(b)、(c)のd方向の矢視図であって張弦梁構造体の桁行き面から見た側面軸組図である。FIG. 2A is a side view taken along the line aa in FIG. 2C, and is a side axis view seen from the end face of the stringed beam structure, and FIG. 2B is a view taken along the line bb in FIG. It is a figure and is a plane axis set figure which showed the 1st and 2nd upper chord material of a stringed beam structure, (c) is a cc arrow line view of Drawing 2 (a), and is tension of a stringed beam structure It is the plane axis diagram which showed material, (d) is an arrow directional view of the d direction of Drawing 2 (b) and (c), and is a side axis diagram seen from the girder surface of a stringed beam structure . コンピュータ内における張弦梁構造体のモデル図であって、引張材に張力が作用した際に任意の格点に支点が形成されていくことを説明した図である。It is a model figure of the stringed beam structure in a computer, Comprising: When the tension | tensile_strength acts on a tension | tensile_strength material, it is a figure explaining that the fulcrum is formed in arbitrary rating points. 図3に続いて支点が形成されていくことを説明した図である。FIG. 4 is a diagram illustrating that a fulcrum is formed following FIG. 3. 図4に続いて支点が形成されていくことを説明した図である。It is the figure explaining that the fulcrum was formed following FIG. 図5に続いて支点が形成されていくことを説明した図である。It is the figure explaining that the fulcrum is formed following FIG. 引張材に作用する張力を保持する圧縮力が上弦材に作用しているのを説明した図である。It is the figure explaining that the compressive force holding the tension | tensile_strength which acts on a tension | tensile_strength is acting on the upper chord material.

以下、図面を参照して、本発明の張弦梁構造体の実施の形態を説明する。なお、図示例はあくまでも一例であり、交互に直交する第1、第2の上弦材、格点から鉛直方向に垂下された束材、平面視的にも側面視的にも斜め方向に延設する引張材を備えた屋根架構を含んでいれば多様な構造形態が適用できる。   Embodiments of a stringed beam structure according to the present invention will be described below with reference to the drawings. The illustrated example is merely an example, and the first and second upper chord materials that are alternately orthogonal, the bundle material that is suspended vertically from the rating point, and extends obliquely both in plan view and in side view Various structural forms can be applied as long as they include a roof frame with a tensile material.

(張弦梁構造体の実施の形態)
図1は本発明の張弦梁構造体の実施の形態を説明した斜視図である。また、図2(a)は図2(c)のa−a矢視図であって張弦梁構造体の妻面から見た側面軸組図であり、図2(b)は図2(a)のb−b矢視図であって張弦梁構造体の第1、第2の上弦材を示した平面軸組図であり、図2(c)は図2(a)のc−c矢視図であって張弦梁構造体の引張材を示した平面軸組図であり、図2(d)は図2(b)、(c)のd方向の矢視図であって張弦梁構造体の桁行き面から見た側面軸組図である。
(Embodiment of tension string beam structure)
FIG. 1 is a perspective view illustrating an embodiment of a stringed beam structure according to the present invention. 2 (a) is a view taken along the line aa of FIG. 2 (c), and is a side-axis assembly diagram viewed from the end face of the stringed beam structure. FIG. 2 (b) is a diagram of FIG. FIG. 2B is a plan view showing the first and second upper chord members of the stringed beam structure, and FIG. 2C is a view taken along the line cc in FIG. 2A. FIG. 2 (d) is a plan view of the tension member of the stringed beam structure, and FIG. 2 (d) is a view taken in the direction of d in FIGS. It is the side axis group figure seen from the field.

図1で示すように、図示する張弦梁構造体30は、屋根架構10と、屋根架構10を支持する柱材6および方杖材7からなる鉛直架構20と、から大略構成されている。   As shown in FIG. 1, the illustrated string beam structure 30 is roughly constituted by a roof frame 10 and a vertical frame 20 including a column member 6 and a cane member 7 that support the roof frame 10.

図1、図2(b)で示すように、屋根架構10は、妻行き方向の複数の第1の上弦材1と桁行き方向の複数の第2の上弦材2を主たる構成部材とし、これらが相互に直交して複数の格点3を形成している。   As shown in FIG. 1 and FIG. 2 (b), the roof frame 10 is mainly composed of a plurality of first upper chord members 1 in the direction of the wives and a plurality of second upper chord members 2 in the direction of the wives. Form a plurality of rating points 3 orthogonal to each other.

この複数の格点3のうち、幾つかの格点3からは鉛直方向に長尺の束材4Aと短尺の束材4Bが垂下されている。   Among the plurality of rating points 3, a long bundle material 4 </ b> A and a short bundle material 4 </ b> B are suspended from some rating points 3 in the vertical direction.

ここで、第1の上弦材1、第2の上弦材2および束材4A,4Bは、鋼製の丸パイプや角パイプなどから形成されている。   Here, the first upper chord member 1, the second upper chord member 2, and the bundle members 4A and 4B are formed of a steel round pipe or square pipe.

また、長尺の束材4Aの下端と束材4A,4Bが垂下されていない格点3の間には引張材5が架け渡されている。   Moreover, the tension | tensile_strength material 5 is spanned between the lower end of the elongate bundle material 4A, and the rating point 3 where the bundle materials 4A and 4B are not suspended.

具体的には、図2(a)、(c),(d)で示すように、引張材5を平面視的に見た際に、引張材5は、2つのグリッド(1つのグリッドは4つの格点3と各格点3同士を繋ぐ第1、第2の上弦材1,2で包囲された正方形)の対角線方向に伸びている。   Specifically, as shown in FIGS. 2A, 2 </ b> C, and 2 </ b> D, when the tensile material 5 is viewed in plan view, the tensile material 5 has two grids (one grid is 4 One square 3 surrounded by first and second upper chords 1 and 2 connecting the three grades 3 and the respective grades 3).

また、図2(a),(d)で示すように、引張材5を側面視的に見た際に、平面視と同様に引張材5は斜め方向に伸びており、2つのグリッドの対角線間に伸びる引張材5はその途中位置に存在する格点3から垂下された短尺の束材4Bにて、引張材5の途中位置が支持されている。   Further, as shown in FIGS. 2A and 2D, when the tensile material 5 is viewed from the side, the tensile material 5 extends in an oblique direction as in the plan view, and the diagonal lines of the two grids. The tensile material 5 extending in the middle is supported by the short bundle 4B suspended from the rating point 3 existing in the middle of the tensile material 5 in the middle.

ここで、引張材5は、構造用ケーブル、PC鋼線等のPC鋼材などから形成されている。   Here, the tensile material 5 is formed of a PC cable such as a structural cable or a PC steel wire.

張弦梁構造体30を構成する屋根架構10が、平面視的にも側面視的にも斜め方向に延設する引張材5を具備することで、この引張材5が斜め方向ゆえに、鉛直力(屋根架構の死荷重等)を負担する成分と地震時水平力を負担する成分の二方向の成分を有することになる。したがって、従来の張弦梁構造体のように屋根面内の水平ブレス材を不要とすることができ、部材数の大幅な低減を図ることが可能になる。   The roof frame 10 constituting the stringed beam structure 30 includes the tension member 5 extending in an oblique direction both in plan view and in side view. It has a component in two directions, a component that bears the dead load of the frame) and a component that bears the horizontal force during the earthquake. Therefore, the horizontal brace material in the roof surface as in the conventional stringed beam structure can be eliminated, and the number of members can be greatly reduced.

そして、この部材数の大幅な低減により、屋根架構10および張弦梁構造体30をスリム化することができ、このことによって屋根架構10および張弦梁構造体30の意匠性を向上させることができる。   And the roof frame 10 and the stringed beam structure 30 can be slimmed down by this significant reduction in the number of members, and thereby the design of the roof frame 10 and the stringed beam structure 30 can be improved.

次に、図3〜6を参照して、任意の引張材に張力が作用した際に任意の格点に支点が順次形成されていくことを説明する。   Next, with reference to FIGS. 3 to 6, it will be described that fulcrums are sequentially formed at arbitrary grades when a tension acts on an arbitrary tensile material.

ここで、図3はコンピュータ内における張弦梁構造体のモデル図であって、引張材に張力が作用した際に任意の格点に支点が形成されていくことを説明した図である。また、図4〜6は順次支点が形成されていくことを説明した図である。   Here, FIG. 3 is a model diagram of a stringed beam structure in a computer, and is a diagram illustrating that a fulcrum is formed at an arbitrary rating point when a tension acts on a tensile material. Moreover, FIGS. 4-6 is the figure explaining the fulcrum being formed sequentially.

図3で示すように、張弦梁構造体30の桁行方向においては、柱材6の下端から延びる方杖材7の端部が支持する格点3は支点8A3〜8A7,8A10〜8A14となり、引張材5の端部が各支点8A3〜8A7,8A10〜8A14に固定される。   As shown in FIG. 3, in the crossing direction of the stringed beam structure 30, the rating points 3 supported by the ends of the cane members 7 extending from the lower ends of the column members 6 are fulcrums 8A3 to 8A7 and 8A10 to 8A14. 5 end portions are fixed to the fulcrums 8A3 to 8A7 and 8A10 to 8A14.

また、妻行き方向においては、柱材6の上端が支点8A1,8A2,8A8,8A9となり、引張材5の端部が各支点8A1,8A2,8A8,8A9に固定される。   Further, in the direction of the wife, the upper end of the column member 6 is a fulcrum 8A1, 8A2, 8A8, 8A9, and the end of the tension member 5 is fixed to each fulcrum 8A1, 8A2, 8A8, 8A9.

また、第1、第2の上弦材1,2によって形成される正方形のグリッドに関し、4つのグリッドの中央位置の格点3に長尺の束材4Aが垂下され、4つのグリッドの隅角部の格点3に短尺の束材4Bが垂下されている。   Further, regarding the square grid formed by the first and second upper chord members 1 and 2, a long bundle member 4A is suspended from the central point 3 of the four grids, and the corners of the four grids. A short bundle 4 </ b> B is suspended from the rating point 3.

引張材5は、長尺の束材4Aの下端からグリッドの対角線方向に延設し、次のグリッドの対角線を跨いだ格点3(束材4A,4Bが存在しない格点3)まで延設しており、引張材5の途中位置が短尺の束材4Bで支持されている。   The tension member 5 extends from the lower end of the long bundle 4A in the diagonal direction of the grid, and extends to the grade 3 (grade 3 where the bundles 4A and 4B do not exist) across the diagonal of the next grid. The middle position of the tension member 5 is supported by a short bundle member 4B.

図4で示すように、張弦梁構造体30に屋根架構10の死荷重が作用し、支点8A2、8A4と、任意の格点3から垂下された束材4Aに跨る引張材5,5に張力が作用すると(X1方向)、張力が作用した引張材5,5によって束材4Aが上方に突き上げられ(Y1方向)、この束材4Aの突き上げによって格点3に新たな支点8Bが形成される。   As shown in FIG. 4, the dead load of the roof frame 10 acts on the stringed beam structure 30, and tension is applied to the supporting members 8A2 and 8A4 and the tension members 5 and 5 straddling the bundle member 4A suspended from an arbitrary rating point 3. When acted (in the X1 direction), the bundle material 4A is pushed upward by the tension members 5 and 5 on which tension is applied (Y1 direction), and a new fulcrum 8B is formed at the rating point 3 by pushing up the bundle material 4A.

次に、図5で示すように、新たに形成された支点8B、既に存在する支点8A12と、任意の格点3から垂下された束材4Aに跨る引張材5,5に張力が作用すると(X1方向)、張力が作用した引張材5,5によって束材4Aが上方に突き上げられ(Y1方向)、この束材4Aの突き上げによって格点3に新たな支点8Cが形成される。   Next, as shown in FIG. 5, when tension acts on the newly formed fulcrum 8B, the fulcrum 8A12 that already exists, and the tension members 5 and 5 straddling the bundle member 4A suspended from the arbitrary rating point 3 ( In the X1 direction), the bundle material 4A is pushed upward by the tension members 5 and 5 on which tension is applied (Y1 direction), and a new fulcrum 8C is formed at the rating point 3 by pushing up the bundle material 4A.

さらに、図6で示すように、新たに形成された支点8C、既に存在する支点8A6と、任意の格点3から垂下された束材4Aに跨る引張材5,5に張力が作用すると(X1方向)、張力が作用した引張材5,5によって束材4Aが上方に突き上げられ(Y1方向)、この束材4Aの突き上げによって格点3に新たな支点8Dが形成される。   Furthermore, as shown in FIG. 6, when tension acts on the newly formed fulcrum 8C, the already existing fulcrum 8A6, and the tension members 5 and 5 straddling the bundle member 4A suspended from the arbitrary rating point 3 (X1). Direction), the bundle 4A is pushed upward by the tension members 5 and 5 on which the tension is applied (Y1 direction), and a new fulcrum 8D is formed at the rating point 3 by pushing up the bundle 4A.

このように、引張材5に張力が作用すると、この引張材5によって束材4Aが上方に突き上げられ、この束材4Aの突き上げによって第1、第2の上弦材1,2の格点3に支点8B,8C,8D等が形成される。このように形成された支点8B,8C,8D等と、既に柱材6等で支持された格点3(支点8A2)等の間において、別途の束材4Aが引張材5で上方に突き上げられて形成された格点3に別途の支点がさらに形成されていく。そして、このような支点の形成が繰り返されることにより、複数の格点3に幾つかの支点が形成されることになる。   In this way, when tension acts on the tension member 5, the bundle member 4A is pushed upward by the tension member 5, and by the pushing-up of the bundle member 4A, the first and second upper chord members 1 and 2 are graded 3. Support points 8B, 8C, 8D and the like are formed. Between the fulcrums 8B, 8C, 8D and the like formed in this way and the rating point 3 (fulcrum 8A2) already supported by the column member 6 or the like, a separate bundle member 4A is pushed upward by the tensile member 5. A separate fulcrum is further formed in the grade 3 formed in this way. Then, by repeating the formation of such fulcrums, several fulcrums are formed at the plurality of rating points 3.

このように複数の支点が形成されることにより、第1、第2の上弦材1,2のスパン(支点間距離)が短くなる。   By forming a plurality of fulcrums in this way, the span (distance between fulcrums) of the first and second upper chord members 1 and 2 is shortened.

第1、第2の上弦材1,2の支点間距離が短くなることにより、第1、第2の上弦材1,2に作用する曲げモーメントが低減することから、第1、第2の上弦材1,2の梁高を可及的に低くすることができ、使用する上弦材の小体格化を図ることができる。そして、このような使用部材の小体格化によっても、屋根架構10の構成部材のスリム化に繋がる。   Since the distance between the fulcrums of the first and second upper chord members 1 and 2 is shortened, the bending moment acting on the first and second upper chord members 1 and 2 is reduced. The beam height of the materials 1 and 2 can be made as low as possible, and the size of the upper chord material to be used can be reduced. And also by the downsizing of such a use member, it leads to slimming of the structural member of the roof frame 10. FIG.

また、図7は、引張材に作用する張力を保持する圧縮力が上弦材に作用しているのを説明した図である。   FIG. 7 is a diagram for explaining that the compressive force for maintaining the tension acting on the tensile material acts on the upper chord material.

図示するように、引張材5に張力が作用することにより(X1方向)、4つの引張材5で包囲された内側に存在するたとえば第1の上弦材1には圧縮力が作用し(X2方向)、この圧縮力によって引張材5に作用する張力が保持されることになる。   As shown in the drawing, when a tension acts on the tension member 5 (X1 direction), for example, a compressive force acts on the first upper chord material 1 existing inside the four tension members 5 (X2 direction). ), The tension acting on the tensile material 5 is held by this compressive force.

以上、本発明の実施の形態を図面を用いて詳述してきたが、具体的な構成はこの実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における設計変更等があっても、それらは本発明に含まれるものである。   The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

1…第1の上弦材、2…第2の上弦材、3…格点、4A…束材(長尺の束材)、4B…束材(短尺の束材)、5…引張材、6…柱材、7…方杖材、8A1〜8A14…支点、8B、8C、8D…支点、10…屋根架構、20…鉛直架構、30…張弦梁構造体   DESCRIPTION OF SYMBOLS 1 ... 1st upper chord material, 2 ... 2nd upper chord material, 3 ... Rating, 4A ... Bundling material (long bundling material), 4B ... Bundling material (short bundling material), 5 ... Tensile material, 6 ... pillar material, 7 ... cane material, 8A1 to 8A14 ... fulcrum, 8B, 8C, 8D ... fulcrum, 10 ... roof frame, 20 ... vertical frame, 30 ... tension string beam structure

Claims (1)

妻行き方向の複数の第1の上弦材と桁行き方向の複数の第2の上弦材が交互に直交して複数の格点を形成し、
全ての格点のうちの幾つかの格点から鉛直方向に束材が垂下され、
平面的に見て妻行き方向および桁行き方向以外の斜め方向に延びる引張材が、前記束材の下端と該束材が垂下されていない格点の間に架け渡されている、屋根架構を備えている、張弦梁構造体。
A plurality of first upper chord members in the direction of the wife and a plurality of second upper chord members in the direction of the girder are alternately orthogonal to form a plurality of scores.
A bundle is suspended vertically from some of all the scores,
A roof frame in which a tensile material extending in an oblique direction other than the wobbling direction and the girder direction in a plan view is stretched between a lower end of the bundling material and a rating point where the bundling material is not suspended. Equipped with a string string structure.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6490291B1 (en) * 2018-11-26 2019-03-27 新日鉄住金エンジニアリング株式会社 String beam structure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3231072B2 (en) * 1992-04-08 2001-11-19 川口 衛 Dome roof structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3231072B2 (en) * 1992-04-08 2001-11-19 川口 衛 Dome roof structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6490291B1 (en) * 2018-11-26 2019-03-27 新日鉄住金エンジニアリング株式会社 String beam structure

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