JP5654171B1 - Roof frame with prestress - Google Patents
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Abstract
【課題】屋根架構を軽量化すると共に剛性を増して大スパンの屋根架構の振動を抑制すると共に構造的にシンプルな屋根架構を提供する。【解決手段】スタジアムや球技施設等に用いられる鉄骨屋根架構であって、横断面においてリブ１０が多角形の頂点に配列され、これらのリブ１０の間に外板２を固定して中空の閉鎖断面とした屋根部材ユニット１を長手方向に連接し、リブ１０に沿って配設した緊張鋼材４に緊張力を導入して両端部に定着して連接した屋根部材ユニット１にプレストレスを導入するとともにプレストレス力で圧着接合して屋根部材ユニット１を一体化し、この一体化した屋根架構部材を並べて一体化したことを特徴とする屋根架構である。多角形は、三角形、逆三角形、菱形のいずれかであり、リブ１０を中空部材とする共にリブ断面内に緊張鋼材４を配設し、リブの中空部にモルタル等の充填材を充填して屋根架構の剛性を高める。【選択図】図１The present invention provides a roof structure that is light in weight and has increased rigidity to suppress vibration of a roof span with a large span and that is structurally simple. A steel roof frame used in a stadium, a ball game facility, or the like, in which ribs 10 are arranged at the apexes of a polygon in a cross section, and a hollow plate is closed by fixing an outer plate 2 between the ribs 10. The roof member units 1 having a cross-section are connected in the longitudinal direction, a tensile force is introduced into the tension steel material 4 arranged along the ribs 10, and the prestress is introduced into the connected roof member units 1 fixed at both ends. At the same time, the roof member unit 1 is integrated by pressure bonding with a prestressing force, and the integrated roof frame members are arranged side by side and integrated. The polygon is any one of a triangle, an inverted triangle, and a rhombus. The rib 10 is a hollow member, the tension steel material 4 is disposed in the rib cross section, and a filler such as mortar is filled in the hollow portion of the rib. Increase the rigidity of the roof frame. [Selection] Figure 1
Description
本願発明は、スタジアムや球技施設等の大型構造物に用いる屋根架構に関するものである。 The present invention relates to a roof frame used for a large structure such as a stadium or a ball game facility.
スタジアムや球技施設もしくは多目的ホール等の広い空間を有する大型構造物の屋根架構は、一般に、アーチ状の鉄骨トラスを用いて構築されることが多い。このような屋根架構は、例えば特許文献１（特開平６−２４３４号公報）に開示されている。 A roof structure of a large structure having a wide space such as a stadium, a ball game facility or a multipurpose hall is generally constructed by using an arched steel truss. Such a roof frame is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-2434.
広い空間の屋根架構は大スパンとなり、そのスパンは、一般に２０ｍ〜６０ｍであり、５万人以上を収容するスタジアムの屋根架構ではスパンが８０ｍに及ぶことがある。そのため、屋根架構材の重量を軽くする必要があり、構造形式として鉄骨トラス架構がよく使われている。なお、ここでいうスパンは、屋根の支柱間の距離または屋根の長さ（張出し長さ）を意味する。
しかし、トラス構造を使用した屋根架構には、以下に挙げる課題がある。
（１）大スパンの屋根架構ではトラス部材の断面を大きくしたり、トラス屋根架構全体の高さを高くする必要がある。そのため、屋根架構の自重が増えるだけでなく施設の内部空間の高さを制限し、また、風荷重を受ける面積が大きくなり、剥き出しのトラスが美観的に好ましくない。
更にトラスを含め、多くの鉄骨屋根架構は、断面剛性が小さいため、大面積の屋根が風荷重を受けると振動しやすく好ましくない。
（２）運送における制約があり、一般には一定長さ以上の部材を道路を利用して運搬できないので、屋根架構部材は、例えば１２ｍまでのものとして工場で製造して搬送し、現場で溶接やボルト等を用いて接合して一体化することが多い。
スタジアムなどの大きな構造物では屋根架構に使用する部材の接合部の数が増大するが、接合具で接合した接合部は地震に対して弱点となるので好ましくなく、接合部が多い屋根架構は好ましくないものである。
（３）接合部が多い屋根架構は、現場での屋根部材の接合具を取り付ける接合作業が多いものとなり、作業に手間がかかり、また、コスト増となる。
A wide space roof frame has a large span, and the span is generally 20 m to 60 m. In a stadium roof frame that accommodates more than 50,000 people, the span may reach 80 m. Therefore, it is necessary to reduce the weight of the roof frame material, and the steel truss frame is often used as a structural form. In addition, the span here means the distance between the support | pillars of a roof, or the length (overhang | projection length) of a roof.
However, the roof frame using the truss structure has the following problems.
(1) In a long span roof frame, it is necessary to enlarge the cross section of the truss member or to increase the height of the truss roof frame as a whole. For this reason, not only the weight of the roof frame increases, but also the height of the internal space of the facility is limited, and the area receiving the wind load becomes large, and the exposed truss is not aesthetically preferable.
Furthermore, many steel roof frames, including trusses, have low cross-sectional rigidity, and are not preferable because large-area roofs tend to vibrate when subjected to wind loads.
(2) Since there are restrictions in transportation and members of a certain length or more cannot generally be transported using roads, roof frame members are manufactured and transported at the factory as, for example, up to 12 m, and welded on site. They are often joined and integrated using bolts or the like.
In large structures such as stadiums, the number of joints of members used for roof frames increases, but joints joined with joints are not preferred because they are vulnerable to earthquakes, and roof structures with many joints are preferred. There is nothing.
(3) A roof frame having many joints requires a lot of joining work for attaching a joining tool for roof members on the site, which takes time and increases the cost.
本発明の課題は、大スパンの屋根架構による大空間を得るために屋根架構を軽量化すると共に屋根架構の剛性を高めて振動の発生を抑制するものである。更に、ボルトなどの接続具を使用する接合部を少なくすることによって充分な強度を有し、かつ、シンプルな構造の屋根架構を提供し、スタジアムや競技施設等の屋根として力学的に合理的で美観的に優れた架構とすると共にコスト低減を図るものである。 An object of the present invention is to reduce the weight of a roof frame in order to obtain a large space with a long span roof frame and to increase the rigidity of the roof frame to suppress the occurrence of vibrations. Furthermore, by providing a simple roof structure that has sufficient strength by reducing the number of joints that use connectors such as bolts, it is mechanically rational as a roof for stadiums and competition facilities. It is intended to reduce the cost while making the frame excellent in aesthetics.
横断面においてリブが多角形の頂点に配列され、これらのリブの間に外板を固定して中空の閉鎖断面とした屋根部材ユニットを長手方向に連接し、リブに沿って配設した緊張鋼材に緊張力を導入して両端部に定着して連接した屋根部材ユニットにプレストレスを導入するとともにプレストレス力で圧着接合して屋根部材ユニットを一体化し、この一体化した屋根架構部材を並べて一体化したことを特徴とする屋根架構である。
多角形は、三角形、逆三角形、菱形のいずれかであり、リブを中空部材とすると共にリブ断面内に緊張鋼材を配設し、リブの中空部にモルタル等の充填材を充填して屋根架構の剛性を高めたものである。
In the cross section, ribs are arranged at the vertices of a polygon, and a roof member unit having a hollow closed cross section is fixed between these ribs and a hollow member is connected in the longitudinal direction. Introduce prestress into the roof member unit that is fixed and connected to both ends by introducing tension force to the roof, and by pressing and joining with the prestress force, the roof member unit is integrated, and the integrated roof frame members are arranged side by side It is a roof frame that is characterized by having become.
The polygon is one of a triangle, an inverted triangle, and a rhombus. The rib is a hollow member, a tension steel material is disposed in the rib cross section, and the hollow portion of the rib is filled with a filler such as mortar to form a roof frame. The rigidity of the is increased.
本発明の効果を以下に列挙する。
（１）複数の薄板からなる鋼板を所定の形状にし、鋼板の両端の間に配置されたリブを連結して閉鎖型断面を形成してあり、屋根断面として中空部を有する閉鎖空間とすることによって座屈強度が大きく、また、大きな曲げ剛性を有しながら、従来の屋根材に比較して軽量な鉄骨屋根部材が得られる。
（２）複数の屋根部材ユニットを連接し、部材断面内に緊張鋼材を配置して通し、両端部材の端部に緊張定着することによって屋根部材ユニット断面にプレストレスが付与されると共に、複数の屋根部材ユニットが圧着接合されて一体化され、この屋根部材ユニットを並設して一体化して所要面積を覆う屋根架構を形成するので、従来のトラス構造等の鉄骨屋根架構に比較して小さい断面で大スパンの屋根架構とすることを可能とした。
（３）複数の屋根部材ユニットをプレストレスを導入して圧着接合で一体化することによって、従来の溶接やボルトによる接合方法に比較して耐震性能を大幅に改善し、地震力による繰り返し荷重によっても破断破壊することのない強固な接合が得られる。
（４）従来の部材毎に接合具を使用する接合方法に比べ、緊張鋼材を緊張定着することによって複数の屋根部材ユニットを圧着接合させて一体化するので、接合作業に要する時間を大幅に短縮でき、省力化と共にコストを削減することができる。
（５）リブ断面内に充填材を充填することによって、剛性を更に高めることができ、風荷重等による振動を抑制することができる。
The effects of the present invention are listed below.
(1) Making a steel plate made of a plurality of thin plates into a predetermined shape, connecting ribs arranged between both ends of the steel plate to form a closed type cross section, and forming a closed space having a hollow portion as a roof cross section Thus, a steel roof member that is lighter than conventional roofing materials while having high buckling strength and high bending rigidity can be obtained.
(2) A plurality of roof member units are concatenated, a tension steel material is arranged and passed through the member cross section, and tension is fixed to the end portions of both end members, whereby prestress is applied to the roof member unit cross section and The roof member unit is crimped and integrated, and this roof member unit is juxtaposed and formed to form a roof frame that covers the required area, so it has a smaller cross section than conventional steel frame roof structures such as truss structures It was possible to make a long span roof frame.
(3) By introducing prestress and integrating multiple roof member units by pressure bonding, the seismic performance is greatly improved compared to conventional welding and bolting methods, and repeated load due to seismic force. In addition, a strong bond that does not break and break can be obtained.
(4) Compared to the conventional joining method that uses a joining tool for each member, a plurality of roof member units are crimped and integrated by fixing the tension steel material, greatly reducing the time required for the joining work. It is possible to reduce the cost as well as labor saving.
(5) By filling the rib cross-section with the filler, the rigidity can be further increased, and vibration due to wind load or the like can be suppressed.
図１及び図２に基づいて本発明の基本部材である屋根部材ユニット１について説明する。
本発明の屋根部材は、屋根部材ユニット１を長手方向に連接し、この連接した屋根部材ユニット１にプレストレスを導入して圧着接合によって一体化するものであり、図１は、屋根部材ユニット１の斜視図である。
A roof member unit 1 that is a basic member of the present invention will be described with reference to FIGS. 1 and 2.
The roof member of the present invention is such that roof member units 1 are connected in the longitudinal direction, prestress is introduced into the connected roof member units 1 and integrated by pressure bonding, and FIG. FIG.
屋根部材ユニット１は、その骨格となるリブ１０が横断面において多角形の頂点に配列するのを基本とするものである。図１の例は、菱形の頂点にリブ１０を配列したものである。
リブ１０の間には薄鋼板の側辺部を折り曲げて接続部２０とした外板２がボルト、溶接等の固定手段で固定してあり、リブ１０を頂点とした菱形空間を有する閉鎖断面の部材である。
The roof member unit 1 basically has ribs 10 as skeletons arranged at the apexes of a polygon in the cross section. In the example of FIG. 1, ribs 10 are arranged at the vertices of a rhombus.
Between the ribs 10, the outer plate 2 which is a connecting portion 20 by bending a side portion of a thin steel plate is fixed by a fixing means such as a bolt or welding, and has a closed cross section having a rhombus space with the rib 10 as a vertex. It is a member.
外板２は、厚さ６〜１２ｍｍの薄鋼板であり、リブ１０は、図１（１）に示す角形鋼管、または、図１（２）〜（５）に示すように、溝形鋼や山形鋼、Ｈ形鋼などの各種形鋼を組み合わせて中空部を有する四角形断面としたものであり、屋根部材の中間部となる屋根部材ユニット１の端面には接続用の接続板が、屋根部材の端部となる屋根部材ユニット１の一端部にはプレストレス導入用の緊張鋼材を定着する定着部１２が設けてある。接続板及び定着部１２には緊張鋼材を通す穴が形成してあり、この穴を通って連接した屋根部材ユニット１の全長に緊張鋼材が配設される。
後述のように屋根部材ユニット１自体にキャンバーを形成する場合は、屋根部材ユニット１の下側のリブ１０に上側のリブ１０よりも大きな緊張力を導入するので、下側のリブ１０の穴の数を多くして緊張鋼材４を多く定着できるようにしてある。
The outer plate 2 is a thin steel plate having a thickness of 6 to 12 mm, and the rib 10 is a square steel pipe shown in FIG. 1 (1), or a grooved steel or a steel plate as shown in FIGS. 1 (2) to (5). A square cross section having a hollow portion is formed by combining various shape steels such as angle steel and H-shape steel, and a connecting plate for connection is provided on the end surface of the roof member unit 1 which is an intermediate portion of the roof member. At one end of the roof member unit 1 serving as an end of the fixing member 12, a fixing unit 12 for fixing a tension steel material for introducing prestress is provided. A hole through which the tension steel material is passed is formed in the connection plate and the fixing portion 12, and the tension steel material is disposed over the entire length of the roof member unit 1 connected through the hole.
When the camber is formed on the roof member unit 1 itself as will be described later, a larger tension force is introduced into the lower rib 10 of the roof member unit 1 than the upper rib 10, so The number of tension steel materials 4 can be fixed by increasing the number.
屋根部材ユニット１の長さは、リブ１０の長さで決まるが、リブ１０を構成する形鋼の市場で入手可能な長さ、および、運送における法規制による制限があるので最大で１５ｍであり、通常１２ｍである。
屋根部材ユニット１を構成するリブ１０と外板２を工場で組立てて中空部材として現場に搬入するのが作業効率の面からは好ましいが、外板２とリブ１０を工場でそれぞれ所定の形状に加工し、現場に個別に搬入して組立て接合して中空断面の屋根部材ユニット１にしてもよい。
The length of the roof member unit 1 is determined by the length of the rib 10, but is 15 m at the maximum because of the length available in the market of the shape steel constituting the rib 10 and restrictions by transportation regulations. Usually 12 m.
Although it is preferable from the viewpoint of work efficiency that the rib 10 and the outer plate 2 constituting the roof member unit 1 are assembled at the factory and carried into the site as a hollow member, the outer plate 2 and the rib 10 are each formed into a predetermined shape at the factory. The roof member unit 1 having a hollow cross section may be formed by being processed, individually brought into the site, assembled and joined.
この屋根部材ユニット１を長手方向に連接して長大スパンの屋根架構部材とするものであるため、屋根部材ユニット１の座屈を防ぐため、屋根部材ユニット１には６ｍ程度の間隔で横梁３を設けるのが好ましい。横梁３の断面形状は、各種の形鋼から適宜選択する。また、リブ１０と同様に、形鋼を組み合わせた組立材を横梁３としてもよい。
また、屋根部材ユニット１に局部座屈防止用のスチフナや補強材等を必要に応じて設置する。
Since the roof member unit 1 is connected in the longitudinal direction to form a long span roof frame member, in order to prevent the roof member unit 1 from buckling, the roof member unit 1 is provided with cross beams 3 at intervals of about 6 m. It is preferable to provide it. The cross-sectional shape of the cross beam 3 is appropriately selected from various shape steels. Similarly to the rib 10, the cross beam 3 may be used as the cross beam.
Further, a stiffener or a reinforcing material for preventing local buckling is installed on the roof member unit 1 as necessary.
リブ１０の断面内に緊張鋼材４を所定の位置に配設するために、一定間隔でガイド部材１３を設ける。ガイド部材１３の間には、鋼管等からなる鋼製シースがガイド部材１３を貫通させて配置してある。 In order to dispose the tension steel material 4 at a predetermined position in the cross section of the rib 10, guide members 13 are provided at regular intervals. A steel sheath made of a steel pipe or the like is disposed between the guide members 13 so as to penetrate the guide members 13.
屋根架構の組み立て
次に複数の屋根部材ユニット１によって屋根架構を形成することについて説明する。
複数の屋根部材ユニット１を連接して所要のスパンの長さとし、屋根部材ユニット１のリブ１０内に配設されたシース４０に緊張鋼材４を挿入し、両端の屋根部材ユニット１の定着部１２に緊張定着する。緊張定着によって屋根部材ユニット１の断面にプレストレスが導入され、屋根部材ユニット１のリブ１０の接合面は圧着され、複数の屋根部材ユニット１が圧着接合されて一体化された大スパンの屋根架構部材が得られる。
Assembly of roof frame Next, the formation of a roof frame by a plurality of roof member units 1 will be described.
A plurality of roof member units 1 are connected to have a required span length, and a tension steel material 4 is inserted into a sheath 40 disposed in the rib 10 of the roof member unit 1, and the fixing portions 12 of the roof member units 1 at both ends are inserted. Tension settles in. Prestress is introduced into the cross-section of the roof member unit 1 by tension fixation, the joint surfaces of the ribs 10 of the roof member unit 1 are pressure-bonded, and a plurality of roof member units 1 are pressure-bonded and integrated to form a large span roof frame. A member is obtained.
端部定着部において緊張鋼材を緊張定着した後は、防錆のために定着具にモルタル等を充填することが好ましい。
また、図示は省略するが従来と同じように、耐火のために緊張鋼材の緊張定着完了後、シース内にグラウトを注入することが好ましい。耐火性を高めるのはグラウト充填に限られるものでなく、耐火被覆を施してもよく、この場合は、緊張鋼材をアンボンドとしてグラウト等の充填材が省略される。
After the tension steel material is tension-fixed at the end fixing portion, it is preferable to fill the fixing tool with mortar or the like for rust prevention.
Moreover, although illustration is abbreviate | omitted, it is preferable to inject | pour grout in a sheath after completion of tension | tensile_strength fixation of a tension steel material for fire resistance, like the past. Increasing the fire resistance is not limited to grout filling, and a fireproof coating may be applied. In this case, filler steel such as grout is omitted with the tension steel material unbonded.
本発明に使用する緊張鋼材は、ＰＣ鋼より線、または、ＰＣ鋼線とするが、耐久性の向上を図るために防錆処理が施されている緊張鋼材、例えば、全素線エポキシ樹脂塗装型ＰＣ鋼より線（商品名：ＳＣストランド、登録商標）を用いることが望ましい。 The tension steel material used in the present invention is a PC steel wire or a PC steel wire, but a tension steel material that has been subjected to a rust prevention treatment in order to improve durability, for example, an all-wire epoxy resin coating It is desirable to use a type PC steel stranded wire (trade name: SC Strand, registered trademark).
屋根架構にキャンバーを設定する場合は、図３に示すように、屋根部材ユニット１の端部端面を設定するキャンバーに応じて屋根部材ユニット１の軸線に対して角度を付けたものとし、設定するキャンバーに合致する曲面に形成した仮設支持台（図示しない）の上に屋根部材ユニット１を順次載せて連接し、リブ１０内に配設した緊張鋼材４を緊張して屋根部材ユニット１同志を圧着接合して一体化すると共に屋根部材ユニット１にプレストレスを導入して所定のキャンバーを付した屋根架構とする。 When setting the camber on the roof frame, as shown in FIG. 3, the angle is set with respect to the axis of the roof member unit 1 according to the camber for setting the end face of the roof member unit 1. The roof member units 1 are sequentially placed and connected on a temporary support base (not shown) formed on a curved surface that matches the camber, and the tension steel members 4 disposed in the ribs 10 are tensioned to crimp the roof member units 1 together. The roof frame is formed by joining and integrating the roof member unit 1 with prestress and attaching a predetermined camber.
屋根部材ユニット１自体に上向きのキャンバーを形成する場合は、屋根部材ユニット１の全てのリブ１０に均一なプレストレスを導入せず、リブ１０の屋根部材ユニット１の断面におけるリブ１０の位置に応じて導入するプレストレスの大きさを変えることによって屋根部材ユニット１自体にキャンバーを設定すると同時に、屋根部材ユニット１同志を圧着接合する。
すなわち、緊張鋼材の緊張による緊張力の合力が屋根部材ユニット１の断面図心に対して偏心して作用するようにし、屋根部材ユニット１自体にキャンバーが形成されるようにする。
When the upward camber is formed on the roof member unit 1 itself, uniform prestress is not introduced to all the ribs 10 of the roof member unit 1, and the rib 10 is in accordance with the position of the rib 10 in the cross section of the roof member unit 1. The camber is set in the roof member unit 1 itself by changing the magnitude of the prestress to be introduced at the same time, and at the same time, the roof member units 1 are pressure bonded.
That is, the resultant force of the tension force due to the tension of the tension steel material acts eccentrically with respect to the sectional centroid of the roof member unit 1 so that the camber is formed on the roof member unit 1 itself.
具体的には、屋根部材ユニット１の下側のリブ１０に上側のリブ１０よりも多い緊張鋼材を配置し、各緊張鋼材を同一の緊張力で緊張定着すると、緊張力の合力は断面図心に対して偏心して作用することから、全体として曲線状の屋根部材が形成される。
屋根を６０〜８０ｍのロングスパンとする場合には、屋根部材ユニット１自体に上向きキャンバーが付されたものとするのが好ましい。
Specifically, when tension steel materials more than the upper ribs 10 are arranged on the lower rib 10 of the roof member unit 1 and the tension steel materials are tensioned and fixed with the same tension force, the resultant tension force is a cross-sectional centroid. Therefore, a curved roof member is formed as a whole.
When the roof has a long span of 60 to 80 m, it is preferable that an upward camber is attached to the roof member unit 1 itself.
所定の長さに連接した屋根部材ユニット１を並列させ、隣接する屋根部材ユニット１を接合材を介してボルト等の接合具で接合して一体化して所要面積を覆う全体の鉄骨屋根架構を完成させる。
図４は、屋根架構にシート状の屋根材５を設置したものであり、屋根材５は防水性を有し、十分な強度を有するフレキシブルな部材からなるものであり、リブ１０に適宜の手段で固定されている。
The roof member units 1 connected to each other in a predetermined length are arranged in parallel, and the adjacent roof member units 1 are joined and joined together with a joining tool such as a bolt through a joining material to complete the entire steel roof frame covering the required area. Let
FIG. 4 is a view in which a sheet-like roof material 5 is installed on a roof frame. The roof material 5 is made of a flexible member having waterproofness and sufficient strength. It is fixed with.
リブ１０の内部にモルタル等の充填材を充填することによって屋根架構の剛性を高め、風荷重による振動を抑制して屋根架構に有害な変形を生じさせないようにすることができる。
充填材は、緊張鋼材を緊張する前に充填する場合と、緊張定着完了後に充填する場合の二通りがあり、いずれの充填方法を採用してもよい。充填材としては、モルタル、または、コンクリートを使用する。
By filling the inside of the rib 10 with a filler such as mortar, the rigidity of the roof frame can be increased, and the vibration due to wind load can be suppressed to prevent harmful deformation of the roof frame.
There are two types of fillers, that is, a case where the tension steel material is filled before being tensioned and a case where the tension steel material is filled after completion of the tension fixation, and any of the filling methods may be adopted. As the filler, mortar or concrete is used.
図５に示す例は、リブ１０の断面内部に緊張鋼材４を通さず、リブ１０の外面に沿って緊張鋼材４を配設するものであり、緊張鋼材４はシース４０内に配設される。屋根部材ユニット１の端部には台形の定着部材１２が設けてあり、中間部には、緊張鋼材のガイド部材１３が適宜の間隔で設置してある。
緊張鋼材４は、リブ１０の外側だけでなく、リブ１０の内部にも配設して緊張定着してもよい。下側のリブ１０の内部に緊張鋼材４を追加配設して緊張定着すると、屋根部材ユニット１の断面図心に対して緊張力が偏心して作用し、屋根部材ユニットにキャンバーが形成される。
In the example shown in FIG. 5, the tension steel material 4 is disposed along the outer surface of the rib 10 without passing the tension steel material 4 inside the cross section of the rib 10, and the tension steel material 4 is disposed in the sheath 40. . A trapezoidal fixing member 12 is provided at an end portion of the roof member unit 1, and a guide member 13 of a tension steel material is installed at an appropriate interval in the intermediate portion.
The tension steel material 4 may be disposed not only on the outside of the rib 10 but also on the inside of the rib 10 to fix the tension. When the tension steel material 4 is additionally disposed inside the lower rib 10 and the tension is fixed, the tension force acts eccentrically with respect to the cross-sectional centroid of the roof member unit 1, and a camber is formed in the roof member unit.
以下に示す例は、リブ１０を三角形に配置した基本配列の屋根部材ユニット１を組み合わせた屋根架構の例である。
図６の例は、リブ１０を逆三角形に配置した逆三角形の中空閉鎖断面を有する屋根部材ユニット１である。
この屋根架構において、屋根部材ユニット１自体に上向きのキャンバーを形成する場合は、下側のリブ１０ａに上側のリブ１０ｂより大きな緊張力を作用させることになるので、リブの断面は、上側のリブ１０ｂより下側のリブ１０ａのほうを大きくしてある。
図７の例は、リブ１０が正立の三角形に配置されたものであり、図８に示す屋根架構は、正立の三角形の屋根部材ユニット１Ａと逆三角形の屋根部材ユニット１Ｂを交互に配列したものである。
The example shown below is an example of the roof frame which combined the roof member unit 1 of the basic arrangement which arrange | positioned the rib 10 in the triangle.
The example of FIG. 6 is a roof member unit 1 having a hollow closed cross section of an inverted triangle in which ribs 10 are arranged in an inverted triangle.
In this roof frame, when an upward camber is formed on the roof member unit 1 itself, a greater tension is applied to the lower rib 10a than to the upper rib 10b. The rib 10a below 10b is made larger.
In the example of FIG. 7, the ribs 10 are arranged in an upright triangle, and the roof frame shown in FIG. 8 is configured by alternately arranging an upright triangular roof member unit 1 </ b> A and an inverted triangular roof member unit 1 </ b> B. It is a thing.
屋根架構の平面形状は、スタジアムや球技施設等の屋根形状の設計に合わせることが可能である。本発明の屋根架構の適用例を示すと、一般的なのは図９に示す矩形のスタジアムであり、また、図１０の張出屋根にも適用可能であり、各種の屋根形状に適応させることができる。図１１の例は、放射状ドーム屋根の場合であって台形アーチとしたものであり、屋根部材ユニット１を連接した屋根架構部材を間隔をあけて配設してドーム形状を形成している。 The planar shape of the roof frame can be matched to the design of the roof shape of a stadium or a ball game facility. An example of application of the roof frame according to the present invention is generally a rectangular stadium shown in FIG. 9, and can also be applied to the overhanging roof shown in FIG. 10, and can be adapted to various roof shapes. . The example of FIG. 11 is a case of a radial dome roof, which is a trapezoidal arch, and the roof frame members connecting the roof member units 1 are arranged at intervals to form a dome shape.
なお、本発明は、図示の実施例の構成に限定するものではなく、建物の設計条件によって本発明の主旨を逸脱しない範囲で種々の変更が可能である。
例えば、外板は、屋根の意匠設計に応じて概略Ｕ字型の湾曲したものとした曲面鋼板とすることも可能である。
In addition, this invention is not limited to the structure of the Example of illustration, A various change is possible in the range which does not deviate from the main point of this invention with the design conditions of a building.
For example, the outer plate can be a curved steel plate that is curved in a generally U shape in accordance with the design design of the roof.
本発明の中空断面を有する屋根部材は、長手方向にプレストレスが導入されており、また、必要に応じて横梁等の座屈防止部材が設けてあるので座屈に強いものであり、屋根部材ユニット１は、リブ１０と外板２からなる中空断面の部材としてあるので大きな曲げ剛性を有し、外板２がトラス材に比較して軽量であることと、屋根部材ユニット１の断面にプレストレストが付与されていることが相まってロングスパンの屋根架構とすることが可能であり、６０ｍ〜８０ｍの長大スパンに適用することができる。 The roof member having a hollow cross section according to the present invention is prestressed in the longitudinal direction, and is provided with a buckling prevention member such as a cross beam as required. Since the unit 1 is a hollow cross-section member comprising the rib 10 and the outer plate 2, the unit 1 has a large bending rigidity, and the outer plate 2 is lighter than the truss material, and the cross-section of the roof member unit 1 is prestressed. Can be combined with a long span roof frame, and can be applied to long spans of 60 to 80 m.
１ 屋根部材ユニット
２ 外板
２０ 接続部
３ 横梁
４ 緊張鋼材
５ 屋根材
４０ シース
１０ リブ
１２ 定着部
１３ ガイド部材
DESCRIPTION OF SYMBOLS 1 Roof member unit 2 Outer plate 20 Connection part 3 Cross beam 4 Tensile steel material 5 Roof material 40 Sheath 10 Rib 12 Fixing part 13 Guide member
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05179709A (en) * | 1992-01-08 | 1993-07-20 | Masahiro Yamamoto | Building and its construction |
| JPH08260605A (en) * | 1995-03-17 | 1996-10-08 | Kiyonori Kikutake | Large-span floor structure system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05179709A (en) * | 1992-01-08 | 1993-07-20 | Masahiro Yamamoto | Building and its construction |
| JPH08260605A (en) * | 1995-03-17 | 1996-10-08 | Kiyonori Kikutake | Large-span floor structure system |
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