JP5734592B2 - Flat truss structure - Google Patents
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- 239000000463 material Substances 0.000 claims description 178
- 238000005304 joining Methods 0.000 claims description 27
- 229910000831 Steel Inorganic materials 0.000 description 42
- 239000010959 steel Substances 0.000 description 42
- 238000003466 welding Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 5
- 238000007747 plating Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Description
本発明は平面トラス構造に関し、特に管状部材を用いた平面トラス構造に関する。 The present invention relates to a planar truss structure, and more particularly to a planar truss structure using a tubular member.
一般的なトラスは、トラスを構成する部材およびトラスの各部材の接合方式により、次のように分類される。 General trusses are classified as follows according to the members constituting the truss and the joining method of each member of the truss.
図5に示すようにトラスの上、下弦材を通しの鋼管41,42と斜材(ラチス材、43,44)を任意の角度で直接溶接した平面トラスが知られている。 As shown in FIG. 5, a flat truss is known in which steel pipes 41 and 42 through a lower chord material and a diagonal material (lattice materials 43 and 44) are directly welded at an arbitrary angle on the truss.
図7にその一部を示すように、トラスの上、下弦材(ここでは下弦材52のみを図示)を通しの鋼管としラチス材53,54の接合部は上、下弦材にガゼットプレート(ここでは下弦材のガゼットプレート55のみを図示)を溶接したもので、ガゼットプレートとラチス材とはボルト接合した平面トラスが知られている。 As shown in FIG. 7, a steel pipe through the truss and the lower chord material (only the lower chord material 52 is shown here) is used as the steel pipe, and the joint portions of the lattice materials 53 and 54 are formed on the upper and lower chord materials. Here, only the lower chord material gusset plate 55 is welded), and a flat truss in which the gusset plate and the lattice material are bolted is known.
図8に示す鋼管トラスの上、下弦材(ここでは下弦材62のみを図示)を通しの鋼管としラチス材63,64の接合部は上、下弦材に鞘管の接合金物(ここでは下弦材の接合金物65のみを図示)を用い金物と斜材(ラチス材)とはボルト接合した平面トラスが知られている(例えば、特許文献1)。 The steel pipe truss shown in FIG. 8 is a steel pipe through which the lower chord material (only the lower chord material 62 is shown) is passed, and the joint portion of the lattice materials 63 and 64 is the upper, and the lower chord material is a sheath pipe joint metal (here, the lower chord material) A flat truss in which a hardware and an oblique material (lattice material) are bolt-joined using only the joint hardware 65 is shown (for example, Patent Document 1).
図9に示す平面鋼管トラスの上、下弦材(ここでは上弦材71のみを図示)を通しの鋼管とし斜材(ラチス材)73,74の接合部は扁平加工して斜材(ラチス材)の接続は接合補助部材75を介してボルト接合した平面トラスが知られている(例えば、特許文献2)。 A flat steel pipe truss shown in FIG. 9 and a steel pipe through which a lower chord material (only the upper chord material 71 is shown) are passed, and the joint portions of the diagonal materials (lattice materials) 73 and 74 are flattened to make an oblique material (lattice material). For this connection, a flat truss that is bolted via a joining auxiliary member 75 is known (for example, Patent Document 2).
図14(b)に示す立体鋼管トラスの上、下弦材(ここでは上弦材81のみを図示)を通しの鋼管とし斜材(ラチス材)83,84の接合部は扁平加工、ラチス材はW型の連続折り曲げ形状でかつ、折り曲げ部は扁平である。各部材の軸芯を一致させるためライナー85で調整した立体トラスが知られている(例えば、特許文献4)。立体トラスにおいて削り出し等の複雑な加工等を使用せずに、鋼管をプレス、切断、穴明等容易な加工で可能な扁平加工方式が発案され、実用化されている(参考、図14(a)及び特許文献3)。 The steel pipe truss shown in FIG. 14 (b) has a steel pipe with a lower chord material (only the upper chord material 81 is shown here) and a slanted material (lattice material) 83, 84 joined flat, and the lattice material is W The mold is continuously bent and the bent portion is flat. A three-dimensional truss adjusted with a liner 85 to match the axis of each member is known (for example, Patent Document 4). A flat processing method has been devised and put into practical use, which enables easy processing such as pressing, cutting and drilling a steel pipe without using complicated processing such as cutting in a three-dimensional truss (reference, Fig. 14 ( a) and Patent Document 3).
立体トラス工法においては、立体を構成する多くの接合部材が各方向から一点の接合部に集中する(最大4方向からの弦材と同じく4方向からの斜材の部材交点)ため、非常に複雑な仕口になり、溶接による接合は実用的に困難であり、一般的ではない。そのために、部材交点に、通常、球形状のであるノードを設けるノード方式が一般的である。ここにおいて、ノード及びトラスを構成する直線部材である鋼管の両端がねじ込み方式の雄雌(ノード側がメスねじ部、鋼管端部側がオスねじ部)加工を要する(参考、図13)。 In the three-dimensional truss construction method, many joining members that make up a three-dimensional structure are concentrated at one joint from each direction (the intersection of diagonal members from four directions as well as the chord from four directions at the maximum), which is very complicated. Therefore, joining by welding is practically difficult and uncommon. For this purpose, a node system is generally provided in which a node having a spherical shape is usually provided at a member intersection. Here, both ends of the steel pipe, which is a linear member constituting the node and truss, require a male and female threaded type (the node side is a female threaded portion and the steel pipe end side is a male threaded portion) (reference, FIG. 13).
図5に示すようにトラスの上、下弦材を通しの鋼管とし斜材(ラチス材)と溶接で接合する場合、次のような問題がある。 As shown in FIG. 5, there are the following problems when the upper chord and the lower chord material are joined to each other with a diagonal pipe (lattice material) by welding.
円形鋼管の弦材41,42に円形鋼管の斜材(ラチス材)43,44を任意の角度で溶接するためにはラチス材の接合部が弦材の外形曲線に密着する必要がある。そのために接合する管の端面は3次元曲線となるよう精度の高い切断が必要である。 In order to weld the circular steel pipe diagonal members (lattice materials) 43 and 44 to the circular steel pipe string members 41 and 42 at an arbitrary angle, the joint portion of the lattice material needs to be in close contact with the outer shape curve of the string member. Therefore, it is necessary to cut the end faces of the pipes to be joined with high accuracy so as to form a three-dimensional curve.
トラスの節点は、集まる部材の軸芯が一点に介することが強度上必要である。しかしこのためにはラチス材相互が干渉して溶接が出来なくなるため、図6(a)に示すように間隔をあけると軸芯が一点に介せず偏芯するとその接続部にモーメント(図6(b))が発生し、捻じれ、歪曲がり等により破損しやすく強度的に充分な構造とはいえなかった。 In terms of strength, the nodes of the truss need to have the axis of the members to be gathered at one point. However, since the lattice materials interfere with each other for this purpose, welding cannot be performed. Therefore, when the gap is provided as shown in FIG. (B)) occurred, and it was easy to break due to twisting, distortion, etc., and it could not be said that the structure was sufficiently strong.
鋼管の溶接は管の外周全方位姿勢での溶接となり高度な溶接技術を要する。また軽鋼構造物(板厚が6mm以下)においては、板厚が薄いため特に高い溶接技術が必要である。 Welding of steel pipes is a welding in all directions of the outer circumference of the pipe and requires advanced welding techniques. Also, in light steel structures (plate thickness of 6 mm or less), a particularly high welding technique is required because the plate thickness is thin.
斜材(ラチス材)の3次元曲線切断の精度が悪いと溶接によるひずみ発生に大きく影響し製品の精度管理が難しい。 If the accuracy of the three-dimensional curve cutting of diagonal materials (lattice materials) is poor, it greatly affects the strain generated by welding, making it difficult to manage the accuracy of the product.
図7に示すようにトラスの上、下弦材にガゼットプレート55を溶接する場合、次のような問題がある。 As shown in FIG. 7, when the gusset plate 55 is welded to the upper and lower chords of the truss, there are the following problems.
ガゼットプレートを弦材の鋼管に取付溶接するため位置調整が難しい。 Position adjustment is difficult because the gusset plate is welded to the steel pipe of the chord material.
ガゼットプレートを弦材の鋼管に溶接すると溶接によるひずみ発生で角度調整が難しい。 If the gusset plate is welded to the steel pipe of the chord material, it is difficult to adjust the angle due to distortion caused by welding.
ガゼットプレートの穴位置と弦材までの寸法に誤差があると斜めに接合される斜材(ラチス材)との取り合いの穴位置があわずボルト接合出来ない問題がある。 If there is an error in the hole position of the gusset plate and the dimension to the chord material, there is a problem that the hole position of the diagonal material (lattice material) to be joined obliquely does not exist and bolt joining cannot be performed.
図8に示すようにトラスの上、下弦材と斜材(ラチス材)の接合を鞘管の接合金物65を用い金物と斜材(ラチス材)とはボルト接合する場合、次のような問題がある。 As shown in FIG. 8, when the upper and lower chord members and the diagonal member (lattice member) are joined to each other by bolting the metal member and the diagonal member (lattice member) using the joint metal fitting 65 of the sheath tube, the following problems occur. There is.
接合金物が弦材の円形鋼管の外形に密着させる精度保持が難しく、弦材と金物に隙間が生じると応力が伝達されない。 It is difficult to maintain the accuracy with which the joint metal is closely attached to the outer shape of the circular steel pipe of the chord material, and stress is not transmitted when a gap is formed between the chord material and the metal fitting.
弦材とラチス材の接合部全個所に接合金物がつくので相当重たくなる。 Since the joint hardware is attached to all the joint parts of the string material and the lattice material, it becomes considerably heavy.
接合金物の費用が高くつく。 The cost of joining hardware is expensive.
図9に示すようにトラスの上、下弦材とラチスの接合部は扁平加工して斜材(ラチス材)の接続は接合補助部材75を介してボルト接合する場合、次のような問題がある。 As shown in FIG. 9, when the upper and lower chord members and the lattice part are flattened and the diagonal member (lattice member) is connected by bolting via the joining auxiliary member 75, there are the following problems. .
接合補助部材は、組立溶接され溶接によるひずみ発生で、弦材の接合部との密着性が保てない。 The joining auxiliary member is assembled and welded and strain is generated by welding, and the adhesion with the joined portion of the string material cannot be maintained.
弦材と斜材(ラチス材)の接合部、全個所に接合金物がつくので相当重たくなる。 The joints of the string material and the diagonal material (lattice material), all the joints are attached, so it becomes quite heavy.
接合金物の費用が高くつく。 The cost of joining hardware is expensive.
図14(b)に示すようにトラスの上、下弦材を通しの鋼管とし、斜材(ラチス材)との接合部は扁平加工、斜材(ラチス材)はW型の連続折り曲げ形状でかつ、折り曲げ部は扁平。各部材の軸芯を一致させるためライナープレート材85で調整した場合、次のような問題がある。 As shown in FIG. 14 (b), the truss and the lower chord material are passed through the steel pipe, the joint with the diagonal material (lattice material) is flattened, and the diagonal material (lattice material) is a W-shaped continuous bent shape. The bent part is flat. When adjusting with the liner plate material 85 to make the axis of each member coincide, there is the following problem.
弦材と斜材(ラチス材)の接合部は、斜材(ラチス材)はW型の連続折り曲げ形状でかつ、折り曲げ部は扁平して上、下弦材と接合するが、弦材とラチス材の軸芯を1点の介するため厚めの数枚のライナープレート材を入れて調整する。ライナープレート材をシャー切断するときねじれが発生して、部材相互が密着せず応力が十分伝達しない問題がある。 The joint between the string material and the diagonal material (lattice material) is that the diagonal material (lattice material) is a W-shaped continuous fold shape, and the bent part is flattened and joined to the lower chord material, but the string material and the lattice material Adjust the thickness of several thick liner plate materials so that the shaft core passes through one point. There is a problem that twisting occurs when the liner plate material is shear-cut, and the members do not adhere to each other and the stress is not sufficiently transmitted.
図13のノード方式によれば、弦材と斜材(ラチス材)の接合部、全個所に接合金物がつくので相当重たくなる上に、ノード金物の費用が高くなるので問題がある。 The node system shown in FIG. 13 has a problem in that the joint hardware of the chord material and the diagonal material (lattice material) is attached to all the parts, so that it becomes considerably heavy and the cost of the node hardware becomes high.
扁平加工方式による工法は偏芯問題、及び扁平部が水平であるために構造物としての外部荷重、特に水平荷重に対して変形量が通常工法より2〜3倍前後大きいという構造力学上の大きな問題点を内包している。また、乾式の平面トラス工法として、上記の立体トラス用扁平式接合方法を平面トラスに応用する方法も考えられる(参考、図12)。しかし、立体トラスの場合と同様の芯問題が存在する。 The construction method by the flat working method is an eccentric problem, and because the flat part is horizontal, the external load as a structure, especially the deformation amount is about 2 to 3 times larger than the normal construction method with respect to the horizontal load. It contains a problem. Moreover, as a dry type flat truss method, a method of applying the above-described flat joining method for a three-dimensional truss to a flat truss is also conceivable (reference, FIG. 12). However, the same core problem as in the case of a solid truss exists.
本発明は、高度な溶接技術を必要とせず、簡単な組み立て方法により、ほとんど偏芯しない平面トラス構造を提供することを目的とする。 An object of the present invention is to provide a planar truss structure that does not require advanced welding techniques and is hardly eccentric by a simple assembly method.
本発明(1)は、平行に配置された二以上の管状の弦材を有し、
前記弦材の間に斜めに架設されている管状の斜材が複数設けられている平面トラス構造において、
前記弦材が、前記弦材の管軸芯上に位置する平面を有する弦材扁平部と、前記弦材扁平部に設けられている前記弦材の管軸芯上に位置する弦材接合孔とを有しており、
前記斜材が、少なくとも両端に前記斜材の管軸芯上に位置する平面を有する斜材扁平部と、前記斜材扁平部に設けられている前記斜材の管軸芯上に位置する斜材接合孔とを有しており、
前記弦材と斜材が前記弦材接合孔及び前記斜材接合孔で高力ボルト接合ないしはボルト接合されていることを特徴とする、平面トラス構造である。
The present invention (1) has two or more tubular chords arranged in parallel,
In the plane truss structure in which a plurality of tubular diagonal members installed obliquely between the chord members are provided,
The chord material flat portion having a flat surface located on the chord material tube axis, and the chord material joint hole located on the chord material tube axis provided in the chord material flat portion And
The diagonal member has a flat portion having a flat surface located at least on both ends on the tube axis of the diagonal member, and an oblique member positioned on the tube axis of the diagonal member provided on the diagonal member flat portion. Material joint hole,
The flat truss structure is characterized in that the chord member and the diagonal member are high-strength bolt joints or bolt joints by the chord member joint hole and the oblique member joint hole.
本発明(2)は、前記平面トラス構造の形成する平面と、全ての前記弦材扁平部及び斜材扁平部とが、互いに平行な平面を有することを特徴とする、前記発明(1)の平面トラス構造。 The present invention (2) is characterized in that the plane formed by the planar truss structure and all the chord material flat portions and the diagonal material flat portions have planes parallel to each other. Plane truss structure.
本明細書において使用する各種用語の意味を説明する。「乾式接合」とは、溶接接合を使用しないで、切断、プレス、穴あけ等の乾式加工で行う工法を意味する。「扁平部」とは、管を押しつぶして平面状に形成した部分を意味する。 The meanings of various terms used in this specification will be described. “Dry bonding” means a method of performing dry processing such as cutting, pressing, drilling, etc. without using welded bonding. The “flat portion” means a portion formed by flattening a tube by crushing it.
本発明は以上のような構成からなるので次のような効果を奏することができる。 Since this invention consists of the above structures, there can exist the following effects.
本発明は、溶接接合トラスやボルト接合式立体トラスにおける、弦材および斜材(ラチス材)に作用する引張力または圧縮力が接合部の軸芯から偏芯する問題がなく、強度的に極めて優れた構造といえる。すなわち、従来の鋼管トラス(図7、図8、図9、図14(b))は、弦材、斜材(ラチス材)の軸芯を一致させるために、弦材、斜材の節点部を扁平して補助鋼板部材(ガセットプレート、52、62、75)や、特殊鋼製金物(図14(b)における85)等で調整されている。しかし、本発明に係る構造によれば、これらの部材を不要として、弦材、斜材に作用する引張力または圧縮力が弦材の軸芯と一致して偏芯を起こさない構造を特長とする。 In the present invention, there is no problem that the tensile force or the compressive force acting on the chord material and the diagonal material (lattice material) in the welded joint truss or the bolt joint type truss is eccentric from the axial center of the joint part, and the strength is extremely high. This is an excellent structure. That is, the conventional steel pipe truss (FIG. 7, FIG. 8, FIG. 9, FIG. 14 (b)) has a nodal portion of the chord material and the diagonal material in order to match the axis of the chord material and the diagonal material (lattice material). Are adjusted with auxiliary steel plate members (gusset plates, 52, 62, 75), special steel hardware (85 in FIG. 14B), and the like. However, according to the structure of the present invention, these members are unnecessary, and the tensile force or the compressive force acting on the chord material and the diagonal material coincides with the axis of the chord material and does not cause eccentricity. To do.
従来の軽鋼構造物(板厚が6mm以下)の溶接接合方式トラス工法は、溶接技能者の技量に品質が左右され所定の強度が担保できるか難しい問題があるが、各トラス節点による摩擦接合を行えば、ボルト径とボルト孔のクリアランスで組み立て寸法上の微調整が可能であり、トラス全体の寸法確保が容易となる。 The conventional welding method truss method for light steel structures (thickness of 6 mm or less) depends on the skill of the welding technician, and there is a problem that it is difficult to guarantee the predetermined strength, but friction welding by each truss node If it performs, fine adjustment on an assembly dimension is possible with the clearance of a bolt diameter and a bolt hole, and the dimension ensuring of the whole truss becomes easy.
従来のような溶接作業、及びこれに伴うどぶ漬けめっき作業、金物類が不要になり低コスト化が図れる。 The conventional welding work and the accompanying immersion plating work and hardware are unnecessary, and the cost can be reduced.
弦材、斜材(ラチス材)の管サイズごとのに扁平金型治具を準備することで様々なトラス形式の標準化が可能となる。 By preparing a flat die jig for each tube size of chord material and diagonal material (lattice material), it is possible to standardize various truss types.
以下、本発明を図示する実態の形態に基づいて説明する。 Hereinafter, the present invention will be described based on actual forms shown in the drawings.
図1は、本発明に係る平面トラス構造の第一態様を示す図である。本発明に係る平面トラス構造は、管状の上弦材11及び管状の下弦材12を有している。これらの上弦材11と下弦材12は平行に配置されている。また、上弦材11と下弦材12との間には、管状の斜材がこれらの間で斜めに複数架設されている(例えば、13,14)。これらの斜材は、上弦材及び下弦材の間に架設されており、これらの斜材と上弦材又は下弦材とこれらの接点を頂点とする三角形が形成されるように配設される。 FIG. 1 is a diagram showing a first aspect of a planar truss structure according to the present invention. The planar truss structure according to the present invention includes a tubular upper chord member 11 and a tubular lower chord member 12. These upper chord material 11 and lower chord material 12 are arranged in parallel. In addition, a plurality of tubular diagonal members are installed between the upper chord member 11 and the lower chord member 12 at an angle (for example, 13, 14). These diagonal members are erected between the upper chord member and the lower chord member, and are arranged so that a triangle with these diagonal members and the upper chord member or the lower chord member and their contacts as apexes is formed.
本発明に係る構造に用いられる上弦及び下弦は、以下の弦材から選択される。弦材は、前記弦材の管軸芯上に位置する平面を有する弦材扁平部17と、前記弦材扁平部に設けられている前記弦材の管軸芯上に位置する弦材接合孔171とを有している。このように管軸芯を含む平面を有する弦材扁平部を設けて、管軸芯上に位置する弦材接合孔を形成することにより、接合した際に少なくとも弦材の管軸芯上で接合点を形成することができる。また、これらの弦材に形成されている弦材扁平部17は、弦材を構成する管の中程に形成されていることが好適である。また当該扁平部は、等間隔に複数設けられていることが好適であり、これらの扁平部は同一平面上に形成されることが好適である。 The upper chord and lower chord used in the structure according to the present invention are selected from the following chord materials. The chord material includes a chord material flat portion 17 having a flat surface located on the tube axis of the chord material, and a chord material joining hole located on the chord material tube axis provided in the chord material flat portion. 171. By providing a chord material flat portion having a flat surface including the tube axis in this way and forming a chord material joint hole located on the tube axis, it is joined at least on the tube axis of the chord material when joined. A point can be formed. Moreover, it is preferable that the chord material flat part 17 formed in these chord materials is formed in the middle of the pipe | tube which comprises a chord material. Further, it is preferable that a plurality of the flat portions are provided at equal intervals, and it is preferable that these flat portions are formed on the same plane.
本発明に係る構造に用いられる斜材は、少なくとも両端に前記斜材の管軸芯上に位置する平面を有する斜材扁平部18と、前記斜材扁平部に設けられている前記斜材の管軸芯上に位置する斜材接合孔181とを有する。このように管軸芯を含む平面を有する斜材扁平部を設けて、管軸芯上に位置する斜材接合孔を形成することにより、接合した際に少なくとも弦材の管軸芯上で接合点を形成することができる。複数の前記斜材扁平部は、同一平面状に形成されていることが好適である。 The diagonal member used in the structure according to the present invention includes an oblique member flat portion 18 having flat surfaces located on the tube axis of the diagonal member at both ends, and the diagonal member provided in the oblique member flat portion. It has diagonal material joining holes 181 located on the tube axis. In this way, by providing an oblique material flat part having a flat surface including the tube axis and forming an oblique material joint hole located on the tube axis, it is joined at least on the tube axis of the chord material when joined. A point can be formed. The plurality of diagonal member flat portions are preferably formed in the same plane.
本発明に係る平面トラス構造では、前記弦材と斜材が、前記弦材接合孔及び前記斜材接合孔で、高力ボルト接合ないしはボルト接合されている。このように高力ボルト接合ないしはボルト接合することにより、当該平面トラス構造における接続部分では、弦材と斜材がその管軸芯で接合されることとなるので、偏芯しない平面トラス構造を得ることができる。より具体的には、前記接合孔を貫通するボルト15とナット16により接合されていることが好適である。このように、接合孔をより扁平部を互いに密着させてボルト・ナットで摩擦接合してもよい。図2に示す乾式接合トラスの接点の詳細は、相互の扁平部との肌合わせ部分(当接平面)が通し管方向に鉛直方向で密着する方式をとる。 In the planar truss structure according to the present invention, the chord member and the diagonal member are high-strength bolt-bonded or bolt-bonded by the chord member-joining hole and the diagonal member-joining hole. By performing high-strength bolt joining or bolt joining in this way, the chord member and the diagonal member are joined by the tube axis at the connection portion in the planar truss structure, so that a flat truss structure that is not eccentric is obtained. be able to. More specifically, it is preferable that the bolts 15 and nuts 16 that penetrate the joint holes are joined. In this manner, the flat holes may be brought into close contact with each other and the bolts and nuts may be friction bonded together. The details of the contact points of the dry joint truss shown in FIG. 2 employ a method in which skin contact portions (contact planes) with the flat portions are in close contact with each other in the vertical direction through the tube.
本発明に係る平面トラス構造は、平面トラス構造の形成する平面と、全ての前記弦材扁平部及び斜材扁平部とが、互いに平行な平面を有することで一特徴を有する。扁平された管材は、扁平部平面に垂直な方向に加わる力に対しては弱いが、扁平部平面に平行な方向に加わる力に対しては高い耐久性を発揮する。すなわち、このように各材料の扁平部の平面が平面トラス構造の形成する平面と平行な平面を有することにより、平面に対して平行な方向から力が加わった場合、極めて高い耐久性を発揮する。 The planar truss structure according to the present invention is characterized in that the plane formed by the planar truss structure and all the chord material flat portions and the diagonal material flat portions have planes parallel to each other. The flattened tube material is weak against a force applied in a direction perpendicular to the flat portion plane, but exhibits high durability against a force applied in a direction parallel to the flat portion plane. That is, when the flat surface of each material has a plane parallel to the plane formed by the plane truss structure, when a force is applied from a direction parallel to the plane, extremely high durability is exhibited. .
図3は、本発明に係る平面トラス構造の第二態様を示す図である。当該態様において平面トラス構造は、基本的に第一態様と同様の構成を有するが、上下左右方向に格子状に配された複数の管状の弦材21、22と、当該弦材の間を管状の斜材23、24により斜めに複数架設された構成を有する。図3に示すように、本発明に係る平面トラス構造は、弦材及び斜材によって三角形が形成されるように配設される。当該平面トラス構造では、弦材は、前記弦材の管軸芯上に位置する平面を有する弦材扁平部25と、前記弦材扁平部に設けられている前記弦材の管軸芯上に位置する弦材接合孔251とを有している。また、斜材は、少なくとも両端に前記斜材の管軸芯上に位置する平面を有する斜材扁平部26と、前記斜材扁平部に設けられている前記斜材の管軸芯上に位置する斜材接合孔261とを有している。また、斜材は、中間にも管軸芯上に位置する平面を有する斜材扁平部27と、前記斜材扁平部に設けられている前記斜材の管軸芯上に位置する斜材接合孔271とを有していることが好適である。 FIG. 3 is a diagram showing a second aspect of the planar truss structure according to the present invention. In this embodiment, the planar truss structure basically has the same configuration as that of the first embodiment, but a plurality of tubular chord members 21 and 22 arranged in a lattice shape in the vertical and horizontal directions, and a tube between the chord members. A plurality of slant members 23 and 24 are installed obliquely. As shown in FIG. 3, the plane truss structure according to the present invention is arranged so that a triangle is formed by a chord material and a diagonal material. In the flat truss structure, the chord material is formed on the chord material flat portion 25 having a plane located on the chord material tube axis, and on the chord material tube axis provided on the chord material flat portion. It has the chord material joint hole 251 located. In addition, the diagonal member is positioned on the diagonal axis of the diagonal member provided on the diagonal member flat portion 26 having a flat surface located on the diagonal axis of the diagonal member at least at both ends. And a diagonal material joining hole 261. Further, the diagonal member includes an oblique member flat portion 27 having a flat surface located on the tube axis in the middle, and an oblique member joint positioned on the tube axis of the diagonal member provided in the oblique member flat portion. It is preferable to have a hole 271.
これらの弦材や斜材は、例えば図3の下部に示すように接合孔を貫通して、高力ボルト接合又はボルト接合される。このように鋼管接合部が扁平面水平式の構造で形成されることによって、平面方向の強度が増す。例えば、斜材と斜材が交差する点では、斜材の中間に形成された扁平部の接合孔により、接合されている。また、弦材と弦材の交差する点において、四方又は二方に延在する斜材を、弦材及び斜材の扁平部の接合孔によりボルト接合するボルト接合部28が形成されている。 For example, as shown in the lower part of FIG. 3, these string members and diagonal members penetrate through the joint holes and are joined with high-strength bolts or bolts. Thus, the strength in the plane direction is increased by forming the steel pipe joint portion in a flat and horizontal structure. For example, at the point where the diagonal material and the diagonal material intersect, they are joined by a flat portion joining hole formed in the middle of the diagonal material. Further, at the point where the chord material and the chord material intersect, a bolt joint portion 28 is formed to join the diagonal material extending in four or two directions with a joint hole of the flat portion of the chord material and the diagonal material.
図4(a)及び図4(b)は、本発明に係る弦材及び斜材の別の接合方式を示した図である。図4(a)に示すように、弦材又は斜材を十字に重ねて、扁平部の接合孔でボルト接合してもよい。また、図4(b)に示すように、横方向に延在する弦材に対して、斜材を複数固定してもよい。このように如何なる方式で接合したとしても、本発明に係る接合孔を貫通するようにボルト接合されていれば、管材接合部の偏芯を起すことなく簡単に乾式接合することができる。 4 (a) and 4 (b) are diagrams showing another joining method of the string material and the diagonal material according to the present invention. As shown to Fig.4 (a), a string material or a diagonal material may be piled up in a cross, and may be bolt-joined by the joining hole of a flat part. As shown in FIG. 4B, a plurality of diagonal members may be fixed to the chord member extending in the lateral direction. Even if it joins by what kind of method in this way, as long as it is bolt-joined so that the joint hole which concerns on this invention may be penetrated, it can dry-type join easily, without raising eccentricity of a pipe material junction part.
本発明に係る弦材及び斜材の材質は特に限定されないが、例えば、黒皮鋼管、表面処理鋼管、塗装鋼管、ステンレス鋼管、アルミ管等各種の金属パイプが挙げられる。表面処理鋼管としては、どぶ漬けめっきや、注ぎがけめっき及びどぶ漬けめっきによる連続鋼管めっき、電気めっきなどにより、亜鉛めっきされた鋼管が好適である。 The material of the string material and the diagonal material according to the present invention is not particularly limited, and examples thereof include various metal pipes such as a black skin steel pipe, a surface-treated steel pipe, a painted steel pipe, a stainless steel pipe, and an aluminum pipe. As the surface-treated steel pipe, a steel pipe galvanized by the soaking plating, continuous steel pipe plating by pouring plating and soaking plating, electroplating, or the like is suitable.
本発明に係る平面トラス構造は、土木・建築構造の一部として利用することが可能である。 The planar truss structure according to the present invention can be used as a part of a civil engineering / architecture structure.
11:上弦材
12:下弦材
13,14:斜材
15:ボルト
16:ナット
17:弦材扁平部
171:弦材接合孔
18:斜材扁平部
181:斜材接合孔
11: Upper chord material 12: Lower chord material 13, 14: Diagonal material 15: Bolt 16: Nut 17: String material flat portion 171: String material joint hole 18: Diagonal material flat portion 181: Diagonal material joint hole
Claims (2)
前記弦材の間に斜めに架設されている管状の斜材が複数設けられている平面トラス構造において、
前記弦材が、前記弦材の管軸芯上に位置する平面を有する弦材扁平部と、前記弦材扁平部に設けられている前記弦材の管軸芯上に位置する弦材接合孔とを有しており、
前記斜材が、少なくとも両端に前記斜材の管軸芯上に位置する平面を有する斜材扁平部と、前記斜材扁平部に設けられている前記斜材の管軸芯上に位置する斜材接合孔とを有しており、
前記弦材と前記斜材同士が、当該弦材の前記弦材扁平部と当該斜材の前記斜材扁平部とが重なり合った状態で、当該弦材の前記弦材接合孔及び当該斜材の前記斜材接合孔を介して、高力ボルト接合ないしはボルト接合されていることを特徴とする、平面トラス構造。 Having two or more tubular chords arranged in parallel,
In the plane truss structure in which a plurality of tubular diagonal members installed obliquely between the chord members are provided,
The chord material flat portion having a flat surface located on the chord material tube axis, and the chord material joint hole located on the chord material tube axis provided in the chord material flat portion And
The diagonal member has a flat portion having a flat surface located at least on both ends on the tube axis of the diagonal member, and an oblique member positioned on the tube axis of the diagonal member provided on the diagonal member flat portion. Material joint hole,
The diagonal members to each other and the chords, in the state where the slant member flat portion are overlapped in the chord flat portion and the diagonal members of the chord, of the chord of the chord joining hole and said diagonal members A high-strength bolted joint or a bolted joint through the diagonal member joining hole, a planar truss structure.
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