JPH0469691B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a method for constructing a three-dimensional truss structure with a large mesh using pre-unitized truss frame members and joining members. It is.

[Problem that the invention seeks to solve]

Conventionally, the method of constructing a three-dimensional truss structure in which a planar, triangular, or quadrangular mesh is constructed using a truss frame material in which upper and lower chord members are connected with lattice members is as follows.
This is done by assembling truss frame materials in advance into a mesh shape and then assembling and connecting them to each other on site.Truss frame materials are usually made of bundles that connect the upper and lower chord members vertically. Because they are assembled in large numbers, their scale has increased, making production more complicated. In addition, the weight increases due to the integration of the bundle materials, making it less convenient to transport.
Erection has become more extensive, and the workability of lifting has also decreased.

This invention was made based on the actual situation of the conventional construction method using a truss frame material with integrated bundle materials, and is intended to propose a construction method with high manufacturability and field workability.

[Means for solving problems]

In the present invention, the bundle material is separated from the truss frame material, the truss frame material and the bundle material are manufactured independently, and when erecting,
By installing the truss structure and bolting the two together using splicing plates on-site, the manufacturability and on-site workability of the truss structure components are improved.

Gusset plates to which the webs of the upper and lower chord members connect are bolted to both ends of the bundle material, and joining hardware to which the flanges of the upper and lower chord members connect are welded to the gusset plate. Assembled as an integrated joint member. The joining hardware is spaced apart from the end of the bundle and horizontally joined to the gusset plate.

By separating the bundle material from the truss frame material, the production of the truss frame material and the connecting members is simplified, and the productivity is improved. At the same time, each member is lighter, making transportation and lifting work easier. be enhanced.

The bundle material is bolted to the middle of the gusset plate without hitting the upper and lower joining hardware, and because there is a distance between the upper and lower ends of the bundle material and the joining hardware, the ends of the upper and lower chord members are aligned with the centroid of the bundle material. This makes it possible to reduce the size of the joining hardware, that is, to reduce the size and weight of the joining member.

The joining members are fixed at the nodal positions of the truss network,
Suspend the truss frame material according to the mesh, install a joint plate between the joint hardware of each upper and lower chord member and the gusset plate of the joint member, and connect both with bolts to connect the joint member and the truss frame material. A three-dimensional truss structure is constructed.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment.

This invention relates to a joining member A as shown in FIG.
From truss frame material B as shown in Figure 1-
This is a method for constructing a large-scale mesh three-dimensional truss structure as shown in .

The joining member A is a bundle member 1 that vertically connects the upper chord member 4 and the lower chord member 5 of the truss frame member B, as shown in Fig. 2.
and a gusset plate 3 which is bolted to both ends thereof and to which the webs of the upper chord member 4 and the lower chord member 5 are connected.
It is horizontally joined to the gusset plate 3, and the upper chord member 4
and the joining hardware 2 to which the flanges of the lower chord members 5 are connected, and are placed at the node positions of the mesh shown by circles in FIG.

The gusset plate 3 faces the truss frame member B connected to the joining member A, and the joining hardware 2 faces the upper chord member 4.
and the flange of the lower chord member 5. The gusset plate 3 and the joining metal fittings 2 are joined together by welding.

Both ends of the bundle material 1 are joined by bolts to the gusset plates 3, 3 with a distance between them and the upper and lower joining metal fittings 2, 2 as shown in the figure, and from one truss frame member B connected to the joining member A. The bending moment is transmitted by the joining hardware 2 and the gusset plate 3, and the shearing force is transmitted by the gusset plate 3 to the adjacent truss frame member B side.

As shown in Figure 2, the truss frame member B consists of an upper chord member 4, a lower chord member 5, and a lattice member 6 installed between them
and is assembled between the joining members A and A, as shown by the line in FIG.

Joint member A and truss frame member B manufactured independently
Each is carried to the site individually, and the hanging is done by first fixing the joining member A to the truss frame material B at the node position of the mesh on the ground, then suspending the truss chord material B along the mesh. The upper and lower chord members 4,
A joint plate 7 is provided between the joint metal fittings 2 of the joint member A and the joint member A, and the joint member A and the truss frame member B are connected by bolting them together. Using this method, the three-dimensional truss structure is successively constructed.

FIGS. 3 and 4 respectively show the joint portion of the joint member A and the truss frame member B of the truss structure that constitutes the planar mesh shown in FIGS.

In the embodiment shown in FIG. 3, the flanges and webs of the upper and lower chord members 4 and 5 are butted against the joining hardware 2 and the gusset plate 3, and the upper and lower chord members 4 and 5 are all connected at the same level as the joining hardware 2. In the embodiment shown in FIG. 4, the upper chord members 4, 4 of the truss frame members B, B in one direction of the truss frame members B in the three directions in FIG. This is a case where the upper chord material 4 is made to serve as a purlin material by directly bolting to the joining hardware 2 and making its web protrude upward from the surface of the joining hardware 2.

In the latter case, there is an advantage that the upper chord member 4 protrudes from the joining hardware 2, so that an intermediary piece for joining the roofing material to the upper chord member 4 can be easily attached. FIG. 4 is a view taken along the line X--X in FIG. 4, and FIG. 4 is a view taken along the Y-Y line.

In the embodiment shown in FIG. 4, the upper chord member 4 protruding from the upper surface of the joining metal fitting 2 is brought close to the centroid of the bundle material 1 of the joining member A on a plane as shown in FIG. Although it is directly joined to the joining hardware 2 without intervening, there is a distance between the upper end of the bundle material 1 and the bottom surface of the joining hardware 2, and the upper chord material 4 is connected directly to the joining hardware 2.
This is possible by not colliding with the With this, the upper chord member 4 in the other direction can also be joined with its end close to the centroid of the bundle member 1, and since the upper chord member 4 can be directly joined to the joining hardware 2, The area of the joining hardware 2 is suppressed to the minimum required size, and the joining hardware 2, that is, the joining member A, can be made smaller and lighter.

FIG. 5 shows a modification of the embodiment shown in FIG. 4. In this embodiment, in order to facilitate the joining of the above-mentioned roof material mounting piece, an upper chord member protrudes upward from the joining hardware 2. 4 is bolted to a plate 8 protruding from the upper surface of the joining hardware 2, and a mounting piece is placed on the flange of the upper chord member 4 to be joined. FIG. 5 is a view taken along the X-X line and the Y-Y line, respectively.

〔Effect of the invention〕

The present invention is as described above, and the joint members and truss frame materials constituting a three-dimensional truss structure are manufactured separately, and the joint members are installed and hung at the time of construction on site, and both the truss frame materials are connected to the joint plate. Since the bolts are connected by passing the bolts across, the joining members and truss frame materials are smaller and lighter, improving the ease of manufacturing each, while also improving the workability of lifting.
Furthermore, since the joint members and the truss frame members are connected by bolts, workability is also improved.

Moreover, since the constituent members of the structure are separated into two members, the joint member and the truss frame member, and each member is made smaller and lighter, it is possible to easily transport and carry the structure.

Furthermore, since there is a distance between the ends of the bundle material and the joining hardware, the ends of the upper and lower chord members can be brought closer to the centroid of the bundle material, and as a result, the joining hardware and joining members can be made smaller. It is possible to reduce the size and weight.

[Brief explanation of drawings]

Figures 1 and 2 are schematic diagrams showing an example of the mesh structure of a three-dimensional truss structure, Figures 2 and 3 are front views showing the joint members and truss frame members, respectively.
Figures 4 and 5 are a plan view and a front view showing the joint between the joint member and the truss frame material, respectively, and Figures 4 and 5 show other configuration examples of the joint. The XX-X line direction arrow view is a Y-Y line direction arrow view. A... Joining member, 1... Bundle material, 2... Joining hardware, 3... Gusset plate, B... Truss frame material, 4... Top chord material, 5... Bottom chord material, 6... Lattice material, 7... joint plate, 8... plate.

Claims (1)

[Claims] 1. In a three-dimensional truss structure in which a large mesh is formed by a truss frame member made by connecting upper and lower chord members with lattice members, a bundle member that vertically connects the upper and lower chord members of the truss frame member, and a bundle member bolted to both ends thereof, A joining member assembled from a gusset plate to which the webs of the upper and lower chord members are connected, and a joining metal fitting that is horizontally joined to the gusset plate at a distance from the end of the bundle material and to which the flanges of the upper and lower chord members are connected. After fixing each node of the mesh, suspend the truss frame members according to the mesh, and connect the upper and lower chord members to the gusset plate by installing joint plates between each upper and lower chord members, the gusset plate, and the joining hardware. A method of constructing a three-dimensional truss structure in which the structure is constructed by bolting to metal parts.