JP2000170308A - Roof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance bending rigidity and lighting by radially arranging a plurality of space truss beams, supporting a single layer truss positioned between the adjacent space truss beams on the space truss beam and constituting a roof of a truss dome. SOLUTION: A plurality of space truss beams 6 are radially arranged, a single layer truss 9 positioned between the adjacent truss beams is supported on the truss beam 6, and a roof is constituted of a truss dome. Next, the single layer truss 9 is supported on the radially arranged truss beam 6, it is reinforced and bending rigidity is improved while the single layer truss 9 is constituted as a main body. The structural characteristics of the dome is utilized to improve the rigidity of the truss beam 6 and the single layer truss 9, and when the truss beam 6 is constituted, the use number of the truss beams 6 is lessened. Thereby the obstruction of lighting by the truss beam 6 can be reduced to the minimum, and lighting can be enhanced while sufficient rigidity is secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trussed roof and, more particularly, to a trussed roof.

[0002]

2. Description of the Related Art For example, as a roof of a truss dome,
2. Description of the Related Art Conventionally, a structure composed of a single-layer truss and a structure composed of a multi-layer truss are known.

[0003]

However, the above conventional technique has the following problems. That is,
In the case of a single-layer truss roof, although it is excellent in lighting, the large dome cannot be formed due to low out-of-plane rigidity, that is, low bending rigidity and large member stress. On the other hand, in the case of a multi-layer truss roof, the lighting is poor.

[0004] It is an object of the present invention to provide a roof which is excellent in bending rigidity and excellent in lighting.

[0005]

The features, functions and effects of the first aspect of the present invention are as follows.

[Features] A plurality of space truss beams are radially arranged, a single-layer truss positioned between adjacent space truss beams is supported by the space truss beams, and a maintenance passage is formed in the space truss beams. It is in.

[Operation] According to the first aspect of the invention, the single-layer truss is supported by the three-dimensional truss beams arranged radially to reinforce the single-layer truss. In addition, the bending rigidity can be improved.

Further, since the maintenance passage is formed in the space truss beam by focusing on the fact that the strong space truss beam is three-dimensional and has a cavity inside, no structural member for forming the maintenance passage is required. is there.

[Effects] Therefore, according to the first aspect of the present invention, while having sufficient bending stiffness, it is excellent in daylighting, and also excellent in maintainability. You can now get to.

According to the second aspect of the present invention, the features, actions,
The effects are as follows.

[Features] In the features of the first invention,
The point is that it is configured in a truss dome.

[Operation] According to the second aspect of the present invention, the truss dome is constructed, and the structural characteristics of the dome are used.
The rigidity of the space truss beams and single-layer truss has been improved, so when constructing the space truss beams, low-rigidity truss beams can be used as components, and the number of space truss beams used can be reduced. And the obstruction of lighting by the space truss beam can be minimized.

[Effects] Therefore, according to the second aspect of the present invention, it is possible to further improve the daylighting property while securing sufficient rigidity.

According to the third aspect of the present invention, the features, actions,
The effects are as follows.

[Features] In the features of the second invention,
The point is that the tension ring is arranged so as to be positioned in the inclined position with respect to the ground.

[Operation] When a baseball stadium is made into a dome, the roof height near the home base must be higher than the set height. In such a case, for example, if the truss dome is made to be an aspheric surface, the specifications of the constituent members are diversified as compared with the spherical dome, resulting in an increase in cost. In addition, if the truss dome is configured as a spherical dome where the height of the roof part near the home base is higher than the setting, the curvature of the truss dome becomes smaller, the site area becomes larger than necessary, and the roof The whole becomes large, which leads to an increase in cost.

On the other hand, a truss dome comprising a space truss beam and a single-layer truss as described above has a sufficiently high rigidity as compared with a single-layer truss dome, and can be tilted without requiring special reinforcement or the like. Can be installed.

Focusing on the above two points, according to the third aspect of the present invention, the truss dome is tilted by disposing the tension ring in a state of being inclined to the ground. By installing the truss dome at an angle so that the upper end of the slope is located near the home base, the truss dome is made into a spherical dome, and the roof height near the home base is not significantly reduced. Can be more than the setting.

[Effects] Therefore, according to the third aspect of the present invention, the baseball stadium can be formed into a dome without causing an unreasonable increase in the site area and without increasing the cost. became.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a dome includes a plurality of pillars 3 in a circumferential direction mounted on a foundation tension ring 2 supported on a foundation 1 (shown by cast-in-place reinforced concrete piles). , The lower tension ring 4 is supported, and the lower tension ring 4 is configured to support a roof 5 formed on a spherical truss dome.

The foundation tension ring 2, column 3, and lower tension ring 4 are made of reinforced concrete.

The roof 5 is made of steel,
As shown in detail in FIG. 3, a plurality of space truss beams 6 are radially arranged, the center-side ends of these space truss beams 6 are connected to each other by a multi-layer truss 7, and the outer peripheral end of the space truss beam 6 is connected. A truss connected to the tension ring 8 and having a single-layer truss 9 positioned between adjacent three-dimensional truss beams 6 supported by the three-dimensional truss beam 6 and the multi-layer truss 7 is provided. It is configured to be attached. Examples of the roof material 10 include a film material and a plate material.

The space truss beam 6 is shown in FIG.
As shown in (b), a pair of upper chords 6A and one lower chord 6B are connected via a plurality of diagonal members 6C, and a deck 11 is provided inside. By providing the maintenance passage, a maintenance passage 12 is formed along the beam longitudinal direction.

As shown in FIGS. 1 and 2, the tension ring 8 of the roof 5 is arranged in a state of being tilted to the ground with one side lifted around the horizontal axis. The means for supporting the ring 4 is a means for directly placing and supporting the inclined lower end of the tension ring 8 on the lower tension ring 4 and supporting the other part of the tension ring 8 on the lower tension ring 4 via the wall 13. . The wall 13 is configured by attaching a wall material to a framework that supports the tension ring 8 on the lower tension ring 4.

The base tension ring 2, lower tension ring 4, and tension ring 8 are all formed in a circular shape. The base tension ring 2 and lower tension ring 4 are
An imaginary arc a having the same curvature connected to the arc including the lower inclined upper end is located closer to the roof center RC than the point b where the lower tension ring 4 intersects with the installation level L. That is, as shown in FIG. 5, most of the lower tension ring 4 is positioned inside a virtual circle C formed from a point where a virtual spherical surface connected to the roof 5 intersects with the installation level L of the lower tension ring 4. The dome center DC is equal to the roof center R in comparison with a dome having a dome roof having the same curvature and height as FIG.
When the roof height near the home base is set to a predetermined value or more when the baseball stadium is to be dome-shaped, the site area is smaller than when the roof 5 is installed horizontally. Can be reduced.

The multi-layered truss 7 located at the center of the roof 5 serves as an equipment suspension section 14 for suspending and supporting equipment such as lighting equipment, broadcasting equipment, and a power source.

[Alternative Embodiment] In the above-described embodiment, the roof 5 configured as a truss dome and installed in an inclined state is shown. However, the roof 5 is installed in a state where the tension ring 8 is positioned in a horizontal posture. The roof 5 may be used.

In the above embodiment, the roof 5 configured as a truss dome has been described, but the shape of the roof 5 can be changed as appropriate.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a side view of a dome.

FIG. 2 is a longitudinal side view of the dome.

FIG. 3 is a plan view of a roof.

FIG. 4 is a longitudinal sectional front view and perspective view of a space truss.

FIG. 5 is a cross-sectional plan view of the dome.

[Explanation of symbols]

 6 Space truss beam 8 Tension ring 9 Single layer truss 12 Maintenance passage

Continued on the front page (72) Inventor Toru Furukawa 1-18-18 Nishiki, Naka-ku, Nagoya City, Aichi Prefecture Inside Nagoya Branch of Takenaka Corporation (72) Inventor Ryoichi Imai 1-18 Nishiki, Naka-ku, Nagoya City, Aichi Prefecture No. 22 Takenaka Corporation Nagoya Branch

Claims (3)

[Claims] A plurality of space truss beams (6) are radially arranged, and a single-layer truss (9) located between adjacent space truss beams (6) is supported by the space truss beams (6). A roof having a maintenance passage (12) formed in the truss beam (6). 2. The roof according to claim 1, wherein the roof is configured as a truss dome. 3. The roof according to claim 2, wherein the tension ring is arranged in a state of being inclined to the ground.