JPH10169008A - Connecting part structure of space truss - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively transmit the axial force of the flange of a truss frame member to the connecting plate of a connection hardware by a relatively simple structure, when the upper and lower chord members of a truss frame member in a space truss are used in such a way that the strong axial direction thereof is transversely directed. SOLUTION: A space truss structure is constituted in a large netlike structure by both truss frame members A that are consisted by connecting the upper and lower cord members 1, 2 whose strong axial directions have been transversely directed with lattice members, and a connecting part hardware B that is arranged in the truss joint position for connecting the end parts of the respective truss frame members A. In that case, the integrated connecting part hardware B is formed by the bundle member 4 for connecting the upper and lower chord members 1. 2 of the truss frame member A, and connecting plates 5, 6 to which the upper and lower chord members 1, 2 are respectively connected so as to be positioned to the upper and lower end of this bundle member 4; and after the webs of the upper and lower chord members 1, 2 have been butted on the connecting end parts of the respective connecting plates 5, 6, the upper and lower chord members 1, 2 and the connecting plates 5, 6 are connected by means of bolts through angle members 7 which squeezes the flanges of the upper and lower cord members 1, 2 therebetween.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure applied to a large mesh three-dimensional truss structure composed of a unitized truss frame member and a joint hardware.

[0002]

2. Description of the Related Art A three-dimensional truss structure is a truss frame member formed by connecting upper and lower chord members such as H-shaped steel members with a lattice member, and the truss frame member is disposed at a truss node position and the ends of each truss frame member are joined. In general, the upper and lower chord members, which are formed of the joint hardware, are disposed with the strong axis direction of an H-section steel or the like having a good cross-sectional performance set to be vertical.

FIG. 7 shows a case in which T-shaped steel is used for the upper and lower chords. A metal joint B is connected to a bundle 60 for vertically connecting the upper and lower chords 50 of the truss frame material A, and the bundle 60 Vertical gusset plate 61 bolted to upper and lower ends of material 60
And a joining plate 62 which is horizontally attached to the vertical gusset plate by welding. The flange 50a of the upper and lower chord members 50 and the joining end of the joining plate 62, and the web 50b of the upper and lower chord members 50 and the vertical gusset plate 61
And the spliced plate 63
Bolted through.

[0004]

As described above, the use of the upper and lower chords such as H-section steels in which the strong axis direction is vertical is required to attach the secondary member to the upper chord of the roof member. It is decided from the point that it is easy,
The use of the upper and lower chord members, such as H-section steel, with the strong axis direction being horizontal is also rarely performed.

When the upper and lower chord members such as H-section steel are used with the strong axis direction being set horizontally, the buckling length of the truss outside the truss structure can be increased, and a larger mesh can be formed. Although there is an advantage that can be achieved, since the joining plate of the joining hardware and the flanges of the upper and lower chord members are joined in a state of being orthogonal to each other, a conventional splice plate cannot be used.

If only the H-section steel web is joined to the joining plate using a splice plate, the ratio of the web to the total cross-sectional area of the H-section steel is usually 1/3 or less, so The axial force of the truss chords is concentrated, causing a problem in structural strength.

According to the present invention, when the upper and lower chord members of a truss frame member in a three-dimensional truss are used so that the strong axis direction is horizontal, the flange axial force of the truss frame member can be reduced by a relatively simple structure. It is an object of the present invention to provide a joint structure of a space truss which can be effectively transmitted to the joint plate of the present invention.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a truss frame member formed by connecting upper and lower chord members having a strong axial direction laterally with a lattice member, and a truss frame member provided at a truss node position. In a three-dimensional truss structure that constitutes a large mesh by joining metal parts to which ends are joined, a bundle material that connects upper and lower chord materials of the truss frame material, and upper and lower chords located at upper and lower ends of the bundle material The joining plate to which the members are connected is used to form an integrated joint hardware, the upper and lower chord webs are respectively butted against the joining ends of the joining plates, and the upper and lower chord members and the joining plate are joined to the upper and lower chords. It is characterized by being bolted via an angle material sandwiching a flange of the material.

In the above configuration, the axial force of the upper and lower chord members is effectively transmitted to the joining plate via the flanges and the angle members of the upper and lower chord members, so that even if the flanges are not joined horizontally as in the related art. With a relatively simple structure, sufficient joint performance can be obtained, and the outer buckling length of the truss structure surface is increased by extending the strong axis direction of the upper and lower chords such as H-section steel, thereby increasing the size of the truss. A mesh can be formed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIGS. 1 and 2 show a three-dimensional truss using H-shaped steel for the upper and lower chords and a single warren truss frame. FIGS. 3 and 4 show H-shaped steel for the upper and lower chords and a truss frame. Shows the case of a space truss with a double warren.

1 to 4, a three-dimensional truss is a truss frame material A which forms a mesh such as a triangle or a quadrangle in plan view.
And a joint metal member B disposed at a node position of the mesh and joined to the end of each truss frame member A.

The truss frame material A is an upper chord material 1 made of H-section steel.
And the lower chord 2 and a lattice member 3 made of an angled material arranged obliquely between the two. The upper chord 1 and the lower chord 2 are arranged such that the strong axis direction of the H-section steel is directed sideways. That is, the webs 1b and 2b are disposed so as to be horizontal.

The metal joint B is mainly composed of a bundle 4 made of a steel pipe or the like and upper and lower joining plates 5 and 6, and the joining plates 5 and 6 are webs 1b and 2b of the upper chord 1 and the lower chord 2, respectively. Are fixed to the upper and lower ends of the bundle 4 by welding.

The webs 1b, 2b of the upper chord material 1 and the lower chord material 2 are respectively butted against the joining ends of the joining plates 5, 6, and the flanges 1a, 2a of the upper chord material 1 and the lower chord material 2 form the angle material 7 for joining. Bolted through. The angle member 7 is disposed so as to sandwich the upper and lower portions of the left and right flanges 1a and 2a of the upper chord member 1 and the lower chord member 2 and is attached to the flanges 1a and 2a of the upper chord member 1 and the lower chord member 2 by bolts 8 and joined. Angle material 7 sandwiching plates 5 and 6 from above and below is bolt 9
To the joining plates 5 and 6.

Further, since the flange of the H-section steel and the root of the web are rounded, the angle member 7, the webs 1b and 2b of the upper chord member 1 and the lower chord member 2 and the joining plates 5 and 6 are connected to each other. With a filler 10 interposed between the base and R
Is avoided so that the touch surface of the angle member 7 can be in close contact (see section aa in FIG. 1).

The connection between the upper chord material 1 and the lower chord material 2 of the truss frame material A and the lattice material 3 is made by a pair of angle materials 11 and a gusset plate 12. The pair of angle members 11 are bolted to the webs 1b and 2b of the upper chord member 1 and the lower chord member 2 (reinforced by reinforcing ribs 13 if necessary).
At 1, the base of the gusset plate 12 is sandwiched, and the tip of the lattice material 3 is bolted to the tip of the gusset plate 12. The invention is not limited to this, and a split T14 may be used as shown in FIG.

The connection between the joint hardware B and the lattice material 3 is shown in FIG.
In the case of a single warren, the upper joint plate 5
A vertical gusset plate 15 is attached to the lower surface of the base material by welding, and the tip of the lattice material 3 is bolted to the vertical gusset plate 15. A reinforcing rib 16 is attached to the upper surface of the lower joining plate 6 by welding.

In the case of the double warren shown in FIG.
The vertical gusset plate 17 is attached by welding to the middle part of the above, and the front end of the lattice material 3 is bolted here. Lower surface of upper joining plate 5 and lower joining plate 6
A reinforcing rib 18 is provided on the upper surface of the.

As shown in FIG. 2, the purlin receiving member 19 is attached to the upper surface of the web 1b of the upper chord material 1 by welding at the truss node position. Bolt. Alternatively, as shown in FIG. 4, a split T21 is bolted to the upper surface of the web 1b of the upper chord member 1 at the truss joint position, and a pair of angle members 22 is attached to the upper part of the split T21. Purlin receiving material 1
9 is bolted.

Further, as shown in FIG. 6, the intersection of the two lattice members 3 at the truss node may be shifted upward or downward from the center axis of the upper chord member 1 and the lower chord member 2. In this case, there is an advantage that the length of the split T14 or the like can be reduced.

In the above configuration, the truss frame material A
And the joint hardware B are manufactured independently, and the truss frame material A and the joint hardware B are combined on site. The butted upper chord material 1 and lower chord material 2 and the joining plates 5 and 6 are bolted to each other with angle members 7.

With the above configuration, the truss frame material A
And the joint metal part B are manufactured separately, so that the bundle of the joint metal parts can be made smaller and lighter than those integrated with the truss frame material, thereby improving productivity and workability. -Workability is improved. Also, since the upper chord material 1 and the lower chord material 2 are disposed with the strong axis direction directed sideways, the buckling length outside the truss construction surface can be increased, and the truss frame material A is lengthened. Larger meshes can be configured. Further, the axial force of the upper chord member 1 and the lower chord member 2 is effectively transmitted to the joining plates 5 and 6 via the flanges 1a and 2a and the angle members 7, so that sufficient joint performance is obtained. Further, the joining metal part B can be formed in a simple configuration including the bundle material 4 and the joining plates 5 and 6, and the joining plates 5 and 6 can be used.
Since it is only necessary to drill bolt holes in the plate material, it can be produced labor-saving with an NC processing machine,
The construction period can be shortened.

[0023]

According to the present invention, there is provided a three-dimensional truss structure having a large mesh formed by arranging upper and lower chord members of a truss frame member so that the strong axis direction is horizontal. And a joining plate to which upper and lower chord members are respectively connected at upper and lower ends of the bundle material to form an integrated joint hardware, and join the webs of the upper and lower chord members to the joining plates, respectively. Since the upper and lower chord members and the joining plate are bolted to each other via an angle member sandwiching the flanges of the upper and lower chord members, the following effects are obtained.

(1) Even if the strong axis direction of the upper and lower chords is horizontal and the flanges of the upper and lower chords are orthogonal to the joining plate, the axial force of the upper and lower chords is effectively transmitted to the joining plate using the angle material. And a joint structure having sufficient joint performance can be obtained.

(2) Since the strong axis direction of the upper and lower chord members can be set to be horizontal, the buckling length outside the truss structure can be increased, and the truss frame member can be lengthened to make a larger mesh. Can be configured.

(3) The joint hardware can be made of a simple structure consisting of a bundle material and a joint plate, and the joint plate need only be formed with bolt holes in the plate material. It becomes possible.

(4) Since the joints of the truss frame members are almost bolted, NC processing can be performed, and productivity and workability are improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment in which a joint structure of a space truss according to the present invention is applied to a single warren truss frame member.

FIG. 2 is a front view of the space truss of FIG.

FIG. 3 is a plan view showing an embodiment in which the joint structure of the space truss according to the present invention is applied to a truss frame material of a double warren.

FIG. 4 is a front view of the space truss of FIG. 3;

5A and 5B show an example in which the structure of the connecting portion between the upper and lower chord materials and the lattice material is different, wherein FIG. 5A is a cross-sectional view and FIG.

FIG. 6 is a front view showing an example in which intersection positions of upper and lower chord materials and lattice materials are different.

7A and 7B show a conventional truss frame material and a metal joint, and FIG.
Is a plan view, and (b) is a front view.

[Description of Signs] A: Truss frame material B: Joint hardware 1 ... Upper chord material 2 ... Lower chord material 3 ... Lattice material 4 ... Bundle material 5 ... Upper joining plate 6 ... Lower joining plate 7 ... Angle material for joining 8 Bolt 9 Bolt 10 Filler

Claims (1)

[Claims] 1. A truss frame member formed by connecting upper and lower chord members oriented in a strong axis direction to each other with a lattice member, and a joint disposed at a truss node position and joined to an end of each truss frame member. In a three-dimensional truss structure that forms a large mesh by metal, a joining material that connects upper and lower chords of the truss frame material and upper and lower chords that are connected to upper and lower ends of the bundling material, respectively. With the above, an integrated joint hardware is formed, the upper and lower chord webs are respectively butted against the joint ends of the joining plates, and the upper and lower chords and the joint plate are angled with the upper and lower chord flanges interposed therebetween. Joint structure of a space truss, characterized by being bolted through a bolt.