JPH09111879A - Curved-surface space truss - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate need of bending a joint plate and a ribbed metal, and prevent generation of a manufacturing error and a construction error by bending an upper chord member to protrude upward at a position other than a knot point. SOLUTION: Truss frame members 41, 42 comprising an upper chord member 1 connected to a lower chord member by a lattice member 3 are disposed in two inclined directions to a ridge center, so the truss frame members 41, 42 form a rhomboid mesh in the plan to compose a space truss which is curved to protrude upward as a whole. At the position of a knot point, a bundle member 6 is disposed to keep an interval between the upper chord member 1 and the lower chord member 2. Joint plates 7, 8 are connected to an upper end and a lower end of the bundle member 6, and the joint plate 7 on the side of the upper chord member 1 is bolted to the upper chord member 1 with a metal 9 provided with a rib to transmit shearing force between the upper chord members 1, 1. At the part of the knot point, axial line of the bundle member 6 and an axial center of the upper chord member 1 cross each other perpendicularly, thereby need of bending the joint plate 7 on the upper chord member 1 side and the metal provided with the rib is eliminated.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】この発明は予め組まれたトラ
ス枠材を棟心に対して傾斜する２方向に配置して構成さ
れる、菱形の網目を形成する曲面形立体トラスに関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curved three-dimensional truss having a rhombic mesh formed by arranging preassembled truss frame members in two directions inclined with respect to the building center.

【０００２】[0002]

【従来の技術及び発明が解決しようとする課題】上弦材
と下弦材をラチス材で連結したトラス枠材を棟心に対し
て傾斜する２方向に配置して構成され、トラス枠材が平
面上、菱形の網目を形成する立体トラスにおいて、特に
立体トラスの架構が全体的に円筒形等に湾曲する場合、
上弦材が部分的に屈曲する形になることから、図７に示
すように同一線上で節点を挟んで隣接するトラス枠材の
上弦材は立面上、節点位置で互いに角度を持って突き合
わせられる。2. Description of the Related Art A truss frame material in which an upper chord member and a lower chord member are connected by a lattice member is arranged in two directions inclined with respect to a ridge center, and the truss frame material is on a plane. , In a space truss forming a diamond-shaped mesh, especially when the frame of the space truss is curved in a cylindrical shape as a whole,
Since the upper chord members are partially bent, the upper chord members of the truss frame members that are adjacent to each other on the same line with the nodes sandwiched are abutted at an angle with each other at the nodal positions on the elevation surface as shown in FIG. .

【０００３】このため、節点位置に配置され、節点に集
合する上弦材にボルト接合される継ぎ板が突き合わせ角
度に従って屈曲しなければならず、継ぎ板の上面に溶接
されて継ぎ板を補剛するリブプレートも屈曲する必要が
ある。For this reason, the joint plate, which is arranged at the node position and bolted to the upper chord members gathering at the node, must be bent according to the butt angle, and is welded to the upper surface of the joint plate to stiffen the joint plate. The rib plate also needs to be bent.

【０００４】継ぎ板とリブプレートが屈曲することか
ら、これらを正確に上弦材に接合するには高い加工精度
が要求され、製作誤差が生ずれば施工誤差を招き、ボル
ト等による接合作業を難しくする他、隣接するトラス枠
材の上弦材間での軸力の伝達効率を低下させる。Since the joint plate and the rib plate are bent, a high processing precision is required to accurately bond them to the upper chord member, and if a manufacturing error occurs, a construction error will occur, making it difficult to perform the bonding work with bolts or the like. In addition, it reduces the transmission efficiency of the axial force between the upper chord members of the adjacent truss frame members.

【０００５】この発明は上記背景より継ぎ板とリブプレ
ートの屈曲を要さない立体トラスを提案するものであ
る。From the above background, the present invention proposes a space truss which does not require bending of the joint plate and the rib plate.

【０００６】[0006]

【課題を解決するための手段】立体トラスの架構は節点
を挟んで隣接するトラス枠材の上弦材間に一定の角度が
付くことによって連続する上弦材が全体的に上に凸に湾
曲するが、本発明では上弦材を、節点を外した位置で上
に凸に屈曲させることにより立体トラスの架構を全体的
に上に凸に湾曲させながら継ぎ板とリブ付き金物を屈曲
させる必要をなくし、製作誤差とそれに伴う施工誤差の
発生を回避し、継ぎ板とリブ付き金物の上弦材への接合
作業を容易にする。In a frame structure of a space truss, a continuous upper chord member is curved upward as a whole by forming a constant angle between the upper chord members of truss frame members adjacent to each other with a node interposed therebetween. In the present invention, the upper chord member is bent convexly upward at the position where the nodes are removed, thereby eliminating the need to bend the joint plate and the ribbed metal fitting while curving the frame of the three-dimensional truss convexly upward. It avoids the production error and the construction error that accompanies it, and facilitates the work of joining the joint plate and the upper chord of the metal piece with ribs.

【０００７】トラス枠材は平面上、同一線上の３節点間
に跨る長さを持ち、その下弦材は隣接する２節点間で直
線状に架設されるが、上弦材は隣接する２節点の中間部
で上に凸に屈曲し、平面上、同一線上で節点を挟んで隣
接するトラス枠材の上弦材の軸線は同一直線上に位置す
る。The truss frame member has a length that extends between three nodes on the same line on a plane, and the lower chord member is erected in a straight line between two adjacent nodes, but the upper chord member is the middle of the two adjacent nodes. The upper chord member of the truss frame member is bent on the same line, and the axis of the upper chord member of the truss frame member is located on the same straight line.

【０００８】上弦材が節点以外の位置で上に凸に屈曲す
ることにより、立体トラスの架構を全体的に湾曲させな
がらも平面上、同一線上で隣接するトラス枠材の上弦材
の軸線を節点を挟んで同一直線上に位置させることがで
きる。By bending the upper chord member upwardly at a position other than the nodes, the axis of the upper chord member of the adjacent truss frame member on the same line is collinearly bent while the structure of the space truss is curved as a whole. It can be positioned on the same straight line with sandwiching.

【０００９】この結果、節点を挟んだ上弦材の軸線間に
角度が付かないため、継ぎ板とリブ付き金物を屈曲させ
る必要がなくなり、その製作が単純化され、製作誤差と
それに伴う施工誤差の発生が回避されると同時に、継ぎ
板への上弦材の接合と、リブ付き金物の継ぎ板への接合
作業が容易になる。また隣接するトラス枠材の上弦材間
での軸力伝達の損失がなくなる。As a result, since there is no angle between the axes of the upper chord members sandwiching the nodes, there is no need to bend the joint plate and the metal fitting with ribs, the manufacture is simplified, and the manufacturing error and the construction error accompanying it are eliminated. At the same time, the occurrence of the generation of the ribs and the joining of the upper chord member to the joint plate and the joining of the ribbed metal piece to the joint plate become easy. Also, there is no loss of axial force transmission between the upper chord members of adjacent truss frame members.

【００１０】[0010]

【発明の実施の形態】この発明は上弦材１と下弦材２を
ラチス材３で連結したトラス枠材41，42を棟心に対して
傾斜する２方向に配置して構成され、トラス枠材41，42
が平面上、菱形の網目を形成し、全体的に上に凸に湾曲
する図１，図２に示すような立体トラスにおいて、図２
に示すようにトラス枠材41，42の上弦材１を節点を外し
た位置で上に凸に屈曲させ、平面上、同一線上で隣接す
るトラス枠材41，41（42，42）の上弦材１，１の軸線を
節点を挟んで同一直線上に位置させた立体トラスであ
る。図２中、一点鎖線が上弦材１の屈曲部分を結ぶ線を
示すが、一点鎖線は棟心に平行な線でもある。BEST MODE FOR CARRYING OUT THE INVENTION The present invention is constructed by arranging truss frame members 41 and 42 in which an upper chord member 1 and a lower chord member 2 are connected by a lattice member 3 in two directions inclined with respect to the ridge center. 41, 42
In the space truss as shown in FIGS. 1 and 2, in which the diamond forms a rhombic mesh on the plane and is curved in a convex shape as a whole,
As shown in, the upper chord member 1 of the truss frame members 41, 42 is bent to be convex upward at the position where the nodal point is removed, and the upper chord member of the truss frame members 41, 41 (42, 42) adjacent on the same line on the plane It is a space truss in which the axis lines of 1 and 1 are located on the same straight line with a node interposed therebetween. In FIG. 2, the alternate long and short dash line indicates the line connecting the bent portions of the upper chord member 1, but the alternate long and short dash line is also a line parallel to the building core.

【００１１】図２では棟心に平行な方向に上弦材１と下
弦材２の高さに水平材５を架設することにより三角形の
網目を形成する立体トラスを示しているが、水平材５の
有無に関係なく２方向のトラス枠材41，42からは菱形の
網目が形成される。水平材５は網目の棟心方向の２節点
間に跨る長さで、棟心に対して傾斜する、平行なトラス
枠材41，41（42，42）の中間点位置間に架設される。水
平材５は立体トラスの妻側の端部にのみ配置される場合
もある。FIG. 2 shows a three-dimensional truss in which a horizontal mesh 5 is erected at the height of the upper chord member 1 and the lower chord member 2 in a direction parallel to the center of the building to form a triangular mesh. Regardless of the presence or absence, a diamond-shaped mesh is formed from the bidirectional truss frame members 41 and 42. The horizontal member 5 has a length that extends between two nodes in the ridge center direction of the mesh, and is installed between the midpoint positions of the parallel truss frame members 41, 41 (42, 42) inclined with respect to the ridge center. The horizontal member 5 may be arranged only on the end of the space truss on the gable side.

【００１２】２方向のトラス枠材41，42は平面上、網目
の同一線上の３節点間に跨る長さを持ち、その上弦材１
は図１，図２に示すように隣接する２節点の中間部で上
に凸に屈曲し、節点を挟んで隣接する上弦材１，１の軸
線間には角度が付かない。２方向のトラス枠材41，42の
内の一方のトラス枠材41（42）は他方のトラス枠材42
（41）の中間点位置に突き当たる。下弦材２は隣接する
２節点間で直線状に架設される。The bidirectional truss frame members 41 and 42 have a length that extends over three nodes on the same line of the mesh on the plane, and the upper chord member 1
As shown in FIG. 1 and FIG. 2, the upper chord members 1 and 1 which are adjacent to each other on both sides of the node are bent at an angle between the axes of the upper chord members 1 and 1 which are bent in a convex shape at an intermediate portion between the two adjacent nodes. One of the two-direction truss frame members 41, 42 is the truss frame member 41 (42) of the other truss frame member 42.
Hit the midpoint of (41). The lower chord member 2 is installed in a straight line between two adjacent nodes.

【００１３】節点位置には上弦材１と下弦材２の間隔を
保持する束材６が配置され、その軸線は、連続する上弦
材１の線を全体的に円弧と見なしたときの曲率半径方向
を向くが、節点部分では束材６の軸線と上弦材１の軸線
が直交する。At the nodal point, a bundle 6 for holding the space between the upper chord member 1 and the lower chord member 2 is arranged, and its axis is the radius of curvature when the continuous line of the upper chord member 1 is regarded as an arc as a whole. Although facing the direction, the axis of the bundle 6 and the axis of the upper chord member 1 are orthogonal to each other at the nodes.

【００１４】図３は同一線上で節点を挟んで隣接するト
ラス枠材41，41（42，42）の接合部を、図４〜図６はそ
の平面を示す。ここに示すように束材６の上端と下端に
は基本的に継ぎ板７，８が接合され、上弦材１と下弦材
２は継ぎ板７，８に接合される。上弦材１側の継ぎ板７
は上弦材１，１間でせん断力を伝達するリブ付き金物９
と共に上弦材１にボルトで接合される。節点部分では束
材６の軸線と上弦材１の軸線が直交するため上弦材１側
の継ぎ板７とリブ付き金物９は屈曲する必要がない。FIG. 3 shows a joint portion of truss frame members 41, 41 (42, 42) which are adjacent to each other on the same line with a node interposed therebetween, and FIGS. 4 to 6 show the planes thereof. As shown here, splice plates 7 and 8 are basically joined to the upper and lower ends of the bundle 6, and the upper chord member 1 and the lower chord member 2 are joined to the splice plates 7 and 8. Joint plate 7 on the upper chord 1 side
Is a metal fitting with ribs 9 for transmitting shearing force between the upper chords 1 and 1
At the same time, it is joined to the upper chord member 1 with bolts. At the node portion, the axis of the bundle 6 and the axis of the upper chord member 1 are orthogonal to each other, so that the joint plate 7 and the ribbed hardware 9 on the upper chord member 1 side do not need to be bent.

【００１５】図３〜図５は上弦材１と下弦材２、及びリ
ブ付き金物９が山形鋼の場合を、図６はＴ形鋼の場合を
示すが、リブ付き金物９にはその軸線が屈曲しないこと
から、上弦材１や下弦材２と同一断面形状の部材が使用
できるため、トラス枠材41（42）製作時の、上弦材１や
下弦材２の余長部分を使用すれば足りる。3 to 5 show a case where the upper chord member 1 and the lower chord member 2 and the metal piece with ribs 9 are angle steels, and FIG. 6 shows the case where they are T-shaped steels. Since it does not bend, it is possible to use a member having the same cross-sectional shape as the upper chord member 1 or the lower chord member 2, so it is sufficient to use the extra length portion of the upper chord member 1 or the lower chord member 2 when manufacturing the truss frame member 41 (42). .

【００１６】前記の通り、一方のトラス枠材41（42）は
他方のトラス枠材42（41）の中間点位置に突き当たり、
図４〜図６に示すように節点位置では一方のトラス枠材
41（42）が節点を貫通する形になるが、節点間に水平材
５が架設されない場合にも、一方のトラス枠材41（42）
に突き当たる他方のトラス枠材42（41），42（41）の上
弦材１，１はその両者間に跨る継ぎ板７と共にリブ付き
金物９にボルト接合される。図５は節点の片側にのみ水
平材５が配置される場合を示す。As described above, one truss frame member 41 (42) abuts at the midpoint position of the other truss frame member 42 (41),
As shown in FIGS. 4 to 6, one truss frame member is provided at the node position.
Although 41 (42) penetrates through the nodes, one truss frame member 41 (42) is used even when the horizontal member 5 is not installed between the nodes.
The upper chord members 1 and 1 of the other truss frame members 42 (41) and 42 (41) that are abutted against are joined to the ribbed hardware 9 by bolts together with the joint plate 7 that extends between them. FIG. 5 shows a case where the horizontal member 5 is arranged only on one side of the node.

【００１７】図１に示すようにトラス枠材41，42の下弦
材２は隣接する２節点間で直線状に架設され、節点部分
では上に凸に屈曲するが、節点を挟んで隣接する下弦材
２，２間ではせん断力の伝達の必要がないことから、屈
曲するリブ付き金物９を用いる必要がないため、各トラ
ス枠材41，42の下弦材２は上に凸に屈曲，あるいは湾曲
する継ぎ板８にボルト接合されるのみでよい。As shown in FIG. 1, the lower chord members 2 of the truss frame members 41 and 42 are erected in a straight line between two adjacent nodes and bend upwardly at the node portions, but the lower chord members adjacent to each other with the nodes sandwiched therebetween. Since it is not necessary to transmit a shearing force between the members 2 and 2, it is not necessary to use a bent ribbed metal member 9. Therefore, the lower chord member 2 of each truss frame member 41, 42 is bent or curved to be convex upward. It is only necessary to be bolted to the joint plate 8.

【００１８】[0018]

【発明の効果】上弦材を、節点を外した位置で上に凸に
屈曲させているため、立体トラスの架構を全体的に上に
凸に湾曲させながらも、平面上、同一線上で隣接するト
ラス枠材の上弦材の軸線を節点を挟んで同一直線上に位
置させることができる。Since the upper chord member is bent in a convex shape at the position where the nodal point is removed, the structure of the space truss is curved in a convex shape as a whole, but is adjacent to each other in a plane and on the same line. The axis line of the upper chord member of the truss frame material can be positioned on the same straight line with the node interposed.

【００１９】この結果、継ぎ板とリブ付き金物を屈曲さ
せる必要がなくなり、継ぎ板とリブ付き金物を屈曲させ
ることによる製作誤差とそれに伴う施工誤差の発生が回
避され、継ぎ板とリブ付き金物の上弦材への接合作業も
容易になり、隣接するトラス枠材の上弦材間での軸力伝
達の損失がなくなる。As a result, it is not necessary to bend the joint plate and the metal fitting with ribs, the production error due to the bending of the joint plate and the metal fitting with ribs and the resulting construction error are avoided, and the joint plate and the metal fitting with ribs are avoided. The joining work to the upper chord members is also easy, and there is no loss of axial force transmission between the upper chord members of the adjacent truss frame members.

【００２０】またリブ付き金物が屈曲する必要がないこ
とから、リブ付き金物には上弦材や下弦材の余長部分を
使用すれば足り、リブ付き金物としての部材を別途用意
する必要がないため、トラス枠材の製作の単純化と製作
コストの低減が図られる。Further, since the ribbed hardware does not need to be bent, it is sufficient to use the extra length portion of the upper chord member or the lower chord material for the ribbed hardware, and it is not necessary to separately prepare a member as the ribbed hardware. , Simplification of production of truss frame material and reduction of production cost can be achieved.

【図面の簡単な説明】[Brief description of the drawings]

【図１】立体トラスの一部を示した立面図である。FIG. 1 is an elevational view showing a part of a space truss.

【図２】図１の平面図である。FIG. 2 is a plan view of FIG.

【図３】図２の節点位置の一部拡大図である。FIG. 3 is a partially enlarged view of the node positions in FIG.

【図４】図３の平面図である。FIG. 4 is a plan view of FIG. 3;

【図５】水平材が節点を挟んで片側だけにある場合の図
３の平面図である。5 is a plan view of FIG. 3 in the case where the horizontal member is only on one side across the node.

【図６】上弦材がＴ形鋼の場合の図３の平面図である。FIG. 6 is a plan view of FIG. 3 when the upper chord member is T-shaped steel.

【図７】従来の立体トラスの一部を示した立面図であ
る。FIG. 7 is an elevation view showing a part of a conventional space truss.

【符号の説明】[Explanation of symbols]

１……上弦材、２……下弦材、３……ラチス材、41，42
……トラス枠材、５……水平材、６……束材、７，８…
…継ぎ板、９……リブ付き金物。1 ... Upper chord material, 2 ... Lower chord material, 3 ... Lattice material, 41, 42
...... Truss frame material, 5 ...... Horizontal material, 6 ...... Bundle material, 7, 8 ...
… Joint plate, 9… Ribbed hardware.

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 上弦材と下弦材をラチス材で連結したト
ラス枠材を棟心に対して傾斜する２方向に配置して構成
され、トラス枠材が平面上、菱形の網目を形成し、全体
的に上に凸に湾曲する立体トラスにおいて、トラス枠材
は平面上、同一線上の３節点間に跨る長さを持ち、その
下弦材は隣接する２節点間で直線状に架設され、上弦材
は隣接する２節点の中間部で上に凸に屈曲し、平面上、
同一線上で節点を挟んで隣接するトラス枠材の上弦材の
軸線は同一直線上に位置している曲面形立体トラス。1. A truss frame member in which an upper chord member and a lower chord member are connected by a lattice member is arranged in two directions inclined with respect to the building center, and the truss frame member forms a rhombic mesh on a plane, In a three-dimensional truss that is convexly curved as a whole, the truss frame material has a length that spans three nodes on the same line on a plane, and the lower chord member is erected linearly between two adjacent nodes, The material bends convexly upward in the middle of the two adjacent nodes,
A curved three-dimensional truss in which the axes of the upper chord members of truss frame materials that are adjacent to each other on the same line with a node in between are located on the same straight line.