JPS6333534B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a three-dimensional frame constituting the Oharima frame.

Buildings that require large spaces, such as gymnasiums and music halls, require three-dimensional structures for their mechanics, and three-dimensional trusses are often used as an example of three-dimensional structures. However, conventional space trusses have many nodes where members are concentrated in three dimensions, which often causes problems in their structure and assembly method.

By the way, in this invention, although the frame as a whole is a three-dimensional structure, each part that makes up the frame is a plane truss, and in particular, by connecting the main members in one direction with stepped truss beams, compared to conventional three-dimensional truss beams. We succeeded in reducing the number of parts and joints, simplifying manufacturing and construction.

The structure of the present invention will be explained below with reference to illustrated embodiments.

1 to 4 show an example of a building having a rectangular plane, in which the main member 1 is arranged at the twill line position of a square pyramid. This main member 1 transmits the loads applied to the frame to the lower frame, for example columns or foundations. The truss beam 2 is parallel to one side of the rectangle,
A large number of rows are arranged between the main members 1 and 1 in a stepped manner in accordance with the slope of the main member 1. The upper chord members and lower chord members of each adjacent truss beam 2 are alternately connected diagonally by horizontal members 3 so as to form a truss shape. The truss beam 2 transmits the load of the roof surface to the main member 1 and restrains the main member 1 to produce a three-dimensional effect. In addition, when a fixed load is applied, as shown in Fig. 5, the truss beam 2 with a large span near the base restrains the spread of the main member 1, so a tensile force acts, reducing the bending deformation of the truss beam 2, and reducing the bending deformation of the truss beam 2. Beam height can be reduced.
Further, the horizontal members 3 arranged in a truss shape can enhance the horizontal rigidity of the entire frame and can prevent lateral buckling of the upper and lower chord members of the truss beam 2.

Furthermore, there is a tree 4 on top of the above structure to receive the roofing material.
or reinforced concrete slabs. These integrate the truss beam 2 in the vertical direction.

6 to 9 show details of the joints of the frame.

The main material 1 is an I-shaped cross-section steel material, the truss beam 2 is made of G-shaped steel back to back, and serves as upper and lower chord members 5, and the lattice material 6 is arranged in an X shape, and the main material 1, the truss beam 2, and its lattice material 6 and the upper and lower chord members 5, and the upper and lower chord members 5 and the horizontal member 3 are joined via gusset plates 7, respectively.

FIG. 9 shows the present invention applied to a plane having a rectangular corner cut-off shape, and a through hole 8 for ventilation and lighting can be provided in the center.

FIG. 10 shows the application to a polygonal plane close to a circle.

Figure 11 shows truss beams 2 to floor 9 arranged in a stepped manner.
It is easy to hang a large space, illuminate a large space, and provide a viewing area.

This invention consists of the above-mentioned structure, and the main material, truss beam, and horizontal member are all constructed in a plane, and because of these, the width can be made the same, there are no three-dimensional nodes, and the number of constituent members is small. Therefore, it is easy to fabricate a steel frame and is suitable for mass production, and the number of assembly pieces and joints on site is small, making construction easy and quick.

In addition, since the main material that forms the main frame is restrained by truss beams arranged in a step-like manner, the bearing part can be supported by pins or rollers in the twill direction, which reduces the impact on the lower structure and reduces the impact on the foundation. The structure or substructure can be simplified. On the other hand, in a truss beam, a tensile force acts to restrain the main member, reducing deflection, so the beam height can be reduced, and the amount of steel can be reduced. In addition, the truss beam is assembled into a truss-like structure by horizontal members, and its overall shape has a large capacity to withstand horizontal loads, making it an earthquake-resistant structure. Furthermore, it is easy to suspend the floor structure from the truss beams arranged in a stepped manner, and it is possible to easily create a room or a place with a view of a large space.

[Brief explanation of the drawing]

Figure 1 is a plan view of a square pyramid, Figures 2 and 3.
The figures are -, - cross-sectional views, Figure 4 is a side view of the truss beam, Figure 5 is an explanatory diagram of the stress state due to vertical loads, Figures 6, 7, and 8 are detailed views of the joints,
FIGS. 9 and 10 are perspective views showing an outline of another embodiment of the present invention, and FIG. 11 is a sectional view showing a state in which an observation room is provided. 1...Main material, 2...Truss beam, 3...Horizontal member, 4...
Wood, 5... chord material, 6... lattice material, 7... gusset plate, 8... through hole, 9... floor, 10... hanging material.

Claims (1)

[Claims] 1 Main members are arranged at the twill lines of a square pyramid or polygonal pyramid, and truss beams parallel to one side of the square or polygonal plane are arranged in multiple rows between the main members and in a stepped manner according to the slope of the main members. A three-dimensional frame characterized in that the upper chord members and lower chord members of adjacent truss beams are connected by horizontal members so as to form a truss shape.