JPS622088B2 - - Google Patents

Description

[Detailed Description of the Invention] The joint structure of the frame members of the present invention is used when a three-dimensional truss structure is used for the roof, floor, etc. of a building, and the joint parts of each frame member have a complicated relative positional relationship. However, it is possible to obtain a rigid joint that uses the same joining materials, is easy to construct, and is structurally mechanically reliable, that is, the center of two circular or polygonal upper and lower horizontal plates. A drum-shaped joining member is used in which parts are connected by pipe members, and gusset plates are attached to the top and bottom of this drum-shaped body to join the joints of each frame member.

For example, buildings with large roofs often use a three-dimensional truss structure as their roof structure, but conventionally the nodal joints of each truss frame member were
As shown in the plan view of the figure, a large plate-shaped joining flange is provided on the chord members of the frame members to be joined, and this joining flange is provided so as to protrude in the direction of the structural members to be joined. The joining was performed using

However, when a roof structure is designed to have a dome shape, for example, a total of 16 types of connection forms for each frame member from A to P occur when viewed from above as shown in the connection diagram in Fig. If this example is used, different shapes of gusset plates, etc. must be used for each different type of connection, and various types of connection members for the frame are required to suit each type of connection. Therefore, it took a lot of time and effort to install the device due to positioning and other issues.

The present invention solves the above-mentioned disadvantages, and embodiments will now be described in detail with reference to the drawings.

Reference numeral 4 in the drawings indicates a truss frame member, in which an upper chord member 1 and a lower chord member 2 are connected by a lattice 3.

A plurality of these frame members 4 are combined to form the frame of the roof of a building, and Figure 2 shows a part of the combination. Or two horizontal plates 5, upper and lower, of regular polygons,
A so-called drum-shaped joining member 8 in which the center portions of the two members 6 are connected by a pipe member 7 is set.

In addition, in order to attach the lattice 3 of each structural member 4 and to reinforce the horizontal plates 5 and 6, gussets are installed on the inside of the horizontal plates 5 and 6 of the joining member 8 in the joining direction of each frame member 4. The plates 9 are arranged vertically in a radial manner.

3 to 5 show the joint structure of the present invention, in which the upper chord member 1 and the lower chord member 2 of each frame member 4 are shown.
, and the upper and lower horizontal plates 5 of the joining member 8,
6 and the end portions are butted together, splice plates 10 and 11 are applied from above and below the abutted portions, and the connection is made using welding, rivets, high-strength bolts, or the like.

Regarding the webs of upper chord material 1 and lower chord material 2,
Similarly, the splice plate 12 is used to connect the joining member 8 to the gusset plate 9.

In the Shiguchi structure constructed in this way, the horizontal plates 5 and 6 of the joint member 8 serve to transmit the bending moment of the frame member 4, and the pipe member 7 connecting the horizontal plates 5 and 6 transmits the shear force of the members. Since it plays the role of transmitting information, it is a rigid joint with sufficient structural reliability.

As described above, the joint structure of the frame member of the present invention uses a drum-shaped joint member, so it can be applied at any angle in a plane, and the joint part of each frame member has a complicated relative positional relationship. Even in cases where the joint members are of the same type, construction is easy, and mechanically, the drum-shaped joint members have centripetal properties, making it possible to transmit force from all angles. This results in a sufficiently reliable rigid joint.

In the description of the embodiment, only a dome-shaped roof has been described, but the present invention is applicable not only to the dome-shaped roof but also to various types of roofs, floors, and other frames such as planar-shaped and arch-shaped.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a conventional joint structure, FIG. 2 is an explanatory diagram showing the joining of the frame, FIG. 3 is a perspective view showing an embodiment of the joint structure of the present invention, and FIG. 4 is a plan view showing a conventional joint structure. Similarly, FIG. 5 is a plan view showing the embodiment, and is a partially omitted sectional view taken along the line AA in FIG. 4. 1... Upper chord material, 2... Lower chord material, 3... Lattice,
4... Frame member, 5, 6... Horizontal plate, 7... Pipe member, 8... Joining member, 9... Gusset plate, 10, 11, 12... Splice plate.

Claims (1)

[Claims] 1. Use a drum-shaped joining member that connects the centers of two upper and lower circular or polygonal horizontal plates with a pipe member, attach gusset plates to the top and bottom of this drum-shaped body, and connect the upper and lower string members. A joint structure for a frame member, characterized in that the joints of each frame member in which the lower chord members are connected with a lattice are joined by connecting the upper and lower parts of each frame member with this drum-shaped joint member inside.