JPH10299078A - Lattice-shaped structure of dome type roof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate difficulties of the producing or welding works of a heavy structure, by forming the circumferential members with thicker pipes than other parts at the intersection parts of the circumferential members and the radial members and providing a retaining member for the section in the thick pipes and connecting the radial members to the thick pipes. SOLUTION: The roof shell of a dome roof is constituted of the radial members 2 and the circumferential members 3. The intersection part members 4 are formed as the intersection parts of circumferential members 3 and a material made of a thick steel pipe such as a seamless pipe is used for the members 4. And a retaining member 5 for the section is provided to increase the sectional capacity so that the intersection member 4 has a sufficient rigidity and strength against the radial shaft force resulting from the own weight of the roof shell supported by the intersection members. The ends or the like of the circumferential members 3 except the radial members 2 and the intersection part members 4 are welded to the intersection part members. Accordingly the construction cost of a roof-shell dome can be reduced and the construction work is simplified and made efficient.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grid-like structure constituting a circular dome roof of a stadium, a multipurpose facility or the like.

[0002]

2. Description of the Related Art A conventional dome roof applied to a ball game stadium, a stadium, a theme park, a multipurpose facility building, etc. has a structure in which a roof material is supported by a partial spherical frame and located above the facility building. This partial spherical frame is a roof shell dome having a single-layer or multi-layer lattice structure, and has a structure in which circumferential members and radial members are joined at points. (See FIG. 1A).

In this case, the point structure of the conventional roof shell dome is as shown in the plane of FIG. 5A and the cross section of FIG.
In order to be able to weld the three-dimensionally assembled roof shell member 101 at an arbitrary angle, a cast steel node 102 having a partially spherical shell shape obtained by cutting a spherical shell up and down has been employed.

[0004]

In the conventional point structure of the roof shell dome shown in FIG.
When the cast steel node 102 having a partial spherical shell shape is adopted so that the steel shell 01 can be welded at an arbitrary angle, a large number of roof shell members 101 are three-dimensionally joined along the spherical shell surface. The cast steel node 102 is connected to each roof shell member 1
It is necessary to have a rigidity that can withstand the stress of No. 01, and it is unavoidable that it becomes a thick heavy object. In addition, the cast steel node 10
Since 2 is a spherical shell shape including a curved surface, the structure is not simple, and even if it is manufactured, the welding operation of the roof shell member is a difficult operation with difficulty. In particular, when the size of the roof dome is increased, an enormous number of the cast steel nodes are required, and the above problem becomes more serious.

The present invention has been made in view of the above problems, and does not employ a partial spherical shell structure as a point structure, eliminates the production of heavy objects associated with this structure, and makes the production and welding work difficult. To provide a dome roof lattice-like structure which is adapted to eliminate the problem.

[0006]

The present invention that achieves the above object has the following matters specifying the invention. In a lattice-shaped structure constituting a circular dome roof composed of a circumferential member and a radial member intersecting with the circumferential member, in a point portion between the circumferential member and the radial member, the circumferential member is It is characterized in that it is formed of a thicker tube than other portions, and a cross-section holding material is provided in the thicker tube, and the radial member is joined to the thicker tube.

[0007] In the roof shell dome, it is most important to maintain the rigidity and strength of the roof shell against the radial axial force due to the weight of the roof shell. Therefore, as the point member of the roof shell dome, the point part of the circumferential member is formed of a steel material such as a seamless pipe having a greater thickness than other roof shell members, and the end of the point part of the circumferential member is thin. In order to introduce a cross-section holding material for maintaining the cross-sectional performance of the point member from the axial force in the radial direction of the roof shell, In the dome, the rigidity and strength against the axial force of the roof shell in the radial direction can be held most effectively, and the structure is extremely simple.
Since the required amount of steel material is extremely small and the manufacture is easy, the construction cost of the entire roof shell dome can be reduced, and the construction work can be simplified and made more efficient.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Here, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 uses the entire structure in the description of the prior art, but the points A and B are an example of the present invention. As shown in FIG. 1, the roof shell dome is constituted by a roof shell 1 having a plural or single-layer lattice structure. This roof shell 1
Is composed of a radial member 2 and a circumferential member 3 in plan view.

Here, the graded member is formed as a graded portion of the circumferential member 3 having the structure shown in FIG. 2, and employs a steel pipe having a mechanically extremely excellent sectional performance as a roof shell member. In this case, a material made of a steel pipe using a thick steel material such as a seamless pipe is used as compared with the steel pipe used for the radial member 2 and the circumferential member 3 other than the point shown in FIG. 1A.

Moreover, the roof shell 1 received by the point member 4
Is provided with a cross-section holding member 5 for improving the cross-sectional performance so that the point member 4 has sufficient rigidity and proof strength against the axial force due to its own weight.

As shown in FIG. 3 and FIG. 4, which are B parts in FIGS. 2 and 1, the grading member 4 includes an end of the circumferential member 3 other than the grading member 3, a lattice member 6 and the like. And the bundle material 7 is welded. In this case, the welding position and the arrangement state of this point member 4 are determined so that the point member 4 can exert the maximum strength against the axial force due to the own weight of the roof shell 1 transmitting the radial member 2.

[0012]

As described above, according to the present invention, at the point between the circumferential member and the radial member, the circumferential member is formed of a thicker tube than other portions, and the thickness of the pipe is increased. By providing a cross-section holding material in the meat pipe and joining the radial member to the thick pipe, a thick steel material is used as a point member of the lattice structure of the roof shell dome, and further, the diameter of the roof shell is mainly increased. In order to introduce a cross-section holding material for maintaining the cross-sectional performance of the point member from the axial force in the direction, the roof shell occupies an extremely large proportion of the stress applied to the roof shell member. Since the point member has the most effective rigidity and strength, the structure is extremely simple, the required amount of steel is extremely small, and it is easy to manufacture. And construction work It is possible to simplify and efficiency of.

[Brief description of the drawings]

FIG. 1 is a plan and half sectional view of a roof shell dome.

FIG. 2 is a view showing a lattice structure of a portion A in FIG. 1;

FIG. 3 is a sectional view taken along a radial direction of a portion B in FIG. 1;

FIG. 4 is a sectional view taken along a circumferential direction of a portion B in FIG. 1;

FIG. 5 is a plan view and a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roof shell 2 Radial member 3 Circumferential member 4 Grating member 5 Cross-section holding material 6 Lattice material 7 Bundle material

Claims (1)

[Claims] 1. A lattice structure comprising a circular dome roof comprising a circumferential member and a radial member intersecting with the circumferential member, wherein at a point between the circumferential member and the radial member, A dome roof lattice, wherein the circumferential member is formed of a thicker tube than other portions, a cross-section holding material is provided in the thicker tube, and the radial member is joined to the thicker tube. Shaped structure.