JPH0749683B2 - Single-layer frame structure of dome structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a single-layer frame structure used for a dome structure.

[Conventional technology]

Conventionally, as the frame structure of the dome structure, the actual construction is 61-206
As disclosed in Japanese Patent Publication No. 03, a single-layer frame structure and a multi-layer frame structure are known.

The single-story frame structure has fewer nodes and members than the multi-story frame structure, is easy to design, has a small number of processing steps, and is advantageous in terms of cost, but it is easy to buckle the frame structure, There is a problem of poor overall stability.

Therefore, in the case of the conventional single-layer frame structure, in order to increase the buckling strength of the frame structure, the grid pattern of the single-layer frame structure is made triangular as shown in FIGS. 8 and 9,
Moreover, as shown in FIG. 10 and FIG. 11, the joint member 5 and the end portions of the respective frame members 4 around the joint member 5 are rigidly joined by the steel joint plates 22 and 23 and a large number of bottles 24 and 25. .

[Problems to be Solved by the Invention]

When the grid pattern in a single-layer frame structure is made triangular and the ends of each frame member are rigidly joined, the number of frame members gathering at one node increases (usually 6 frame members gather), and many Rigid jointing of the frame members at 1 node complicates the structure of the joint and raises the cost, and the cross-sectional shape of the frame members used is also limited. It becomes a frame structure.

Further, as shown in FIG. 12, the wedge-shaped projecting end of the frame member 4 made of square steel pipe is fitted into the V-shaped recess of the joint member having the six plate bodies 6 arranged radially and rigidly joined by welding. However, in this case, since the V-shaped concave portion and the wedge-shaped protruding end portion have an acute angle, it is difficult to perform welding, and the structure of the rigid joint portion is complicated and the amount of welding is significantly increased, resulting in high cost. .

This invention reduces the number of skeleton members that are rigidly joined together at one node by making the rigid joint grid pattern into a polygonal space of a quadrangle or more. A single-layer skeleton of a dome structure that simplifies the structure of the joint to reduce the cost by reducing the number of skeletons and can use skeletons of arbitrary cross section by connecting the reinforcing members to the nodes with pins The purpose is to provide a frame.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, in a single-layer frame structure of a dome structure of the present invention, a large number of frame members 1 are rigidly joined, and a single-layer frame main body of a dome structure having a polygonal grid pattern of square or more is provided. The in-plane shear rigidity reinforcing member 2 is arranged in each polygon frame space in the single-layer frame main frame, and the in-plane shear rigidity reinforcing member 2 forms the polygon frame space. It is pin-joined to the rigid joint.

[Action]

Within each polygonal frame space in the single-layer frame main frame of the dome structure having a polygonal grid pattern of quadrangle or more,
An in-plane shear rigidity reinforcing member is arranged, and the in-plane shear rigidity reinforcing member is pin-coupled to each rigid joint portion of the frame member forming the polygonal frame space, and the in-plane shear rigidity reinforcing member is provided. The buckling resistance of the single-layer frame main frame is enhanced.

〔Example〕

 Next, the present invention will be described in detail with reference to the illustrated example.

1 to 6 show an embodiment of the present invention, in which a skeleton member 1 composed of a large number of square steel pipes having a quadrangular cross section is provided.
Are arranged so as to form a large number of hexagons located on the dome surface, and a pair of opposed ridge green portions of the frame member 1 are arranged inside and outside the dome. Of the oblong angle V shape in the Y-shaped steel joint member 8 having the plate bodies 7 arranged at 120 ° intervals to form the obtuse angle V-shaped wedge-shaped protruding ends by obliquely cutting the end portions of the flat obtuse angle V shape. The wedge-shaped protruding end of the frame member 1 is fitted into the recess and rigidly joined by welding to form the single-layer frame main frame 2 of the dome structure having a hexagonal grid pattern. In the center of each hexagonal space in frame 2, the six radial spaces are arranged at equal angular intervals.
A joint metal fitting 12 is arranged, which is composed of a plurality of steel plate webs 9 and steel plate upper flanges 10 and steel plate lower flanges 11 fixed by welding over the upper and lower surfaces of each web 9.

In addition, a single-layer frame main frame of a dome structure having high rigidity 2
And the in-plane shear rigidity reinforcing member 3 is arranged in each polygonal frame space in the single-layer frame main frame 2,
The in-plane shear rigidity reinforcing member 3 can form a polygonal frame space.

At both ends of the reinforcing member main body 13 made of a rectangular steel pipe, slits extending along a pair of opposing ridge edges are provided, and one side portion of the steel end plates 14 and 15 is fitted into the slits and welded. The steel cover plates 16 are fixed to each other, and the steel cover plates 16 are fixed to both ends of the reinforcing member main body 13 by welding to form a reinforcing member 17.

Six reinforcing members 17 are radially arranged around the joint fitting 12, and the web 9 of the joint fitting 12 and an end plate 14 at one end of the reinforcement member 17 are arranged so as to be arranged in series. 9 and steel end plate 14 over both sides of steel joint plate 14
Are brought into contact with each other and joined by bolts 19,
And 6 reinforcing members radially arranged and connected to the
The in-plane shear rigidity reinforcing member 3 is constituted by 17 and. The end plate 15 at the other end of the reinforcing member 17 and the plate body 7 of the joint member 8 at the rigid joint portion of the single-layer frame structure 2 are arranged in series, and the plate body 7 and the end plate 15 are provided on both sides. The steel joint plate 20 is abutted and joined by the bolt 21, that is, the plate body 7 of the joint member 8 and the reinforcing member facing the plate body 7.
The end plate 15 at one end of 17 is a steel joint plate 20 and a bolt 21.
It is pin-joined by.

The in-plane shear rigidity reinforcing member 3 serves as a component rather than an auxiliary member, and increases the buckling strength of the single-layer frame structure.

In the case of the above-mentioned embodiment, since the square steel pipe is used as the frame member 1, the buckling strength is large and the structure of the rigid joint is simplified as compared with the case of using the frame members having other cross sections. Rigid joining can be performed at low cost.

In the case of carrying out the present invention, as the in-plane shear rigidity reinforcing member 3, a steel material or a wire material extending diagonally of the polygonal frame space may be used, and the polygonal space in the frame main bridge groove is a quadrangle. Alternatively, it may be a pentagon. Furthermore, a pre-stressed in-plane shear stiffness reinforcing member may be used.

Further, as shown in FIG. 7, a triangular frame space may be provided between the hexagonal frame spaces in the single-layer frame main frame.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

The number of frame members rigidly joined to the single-layer frame main frame 2 of the dome structure can be reduced, and the rigid-joint assembling construction of the single-layer frame main frame can be easily performed. Since the joint between the shear rigidity reinforcing member 3 disposed in the rectangular frame space and the rigid joint portion in the single-layer frame main frame is a pin joint, it is possible to easily assemble and construct. And the shear rigidity reinforcing member 3
With this, the rigidity of the single-layer frame structure can be increased and the buckling strength can be increased, and the single-layer frame structure of the dome structure having high rigidity can be easily constructed. It is possible to simplify the structure of the rigid joint portion to improve the aesthetic appearance and economically perform the rigid joint construction.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention. FIG. 1 is a side view showing a part of a single-layer frame structure of a dome structure, and FIG. 2 is a single-layer frame structure thereof. Fig. 3 is a plan view showing a part of Fig. 3, Fig. 3 is a plan view showing a part of the single-layer frame structure,
FIG. 4 is an enlarged plan view showing the frame member rigid joint and the coplanar shear rigid strong member pin joint in FIG. 3, and FIG. 5 is an enlarged plan view showing a part of the coplanar shear rigid strong member. 6 and 6 are sectional views taken along the line AA of FIG. FIG. 7 is a perspective view showing a part of a single-layer frame structure in which a triangular frame space is provided between hexagonal frame spaces. FIG. 8 is a plan view showing a part of a conventional single-layer frame structure having a triangular frame space, FIG. 9 is a side view showing a part of the single-layer frame structure, and FIG. 10 is the conventional single-layer frame structure. FIG. 11 is a plan view showing a rigid joint portion of a frame member in a frame, FIG. 11 is a longitudinal side view thereof, and FIG. 12 is a plan view showing a state where six frame members made of square steel pipe are rigidly joined. In the figure, 1 is a frame member, 2 is a single-layer frame main frame, 3 is a coplanar shear rigid member, 7 is a plate, 8 is a steel joint member, 9 is a steel plate web, and 10 is a steel plate upper flange. , 11
Is a steel plate lower flange, 12 is a fitting, 14 and 15 are steel end plates, 17 is a reinforcing member, 18 is a steel joint plate, 19 is a bolt,
20 is a steel joint plate and 21 is a bolt.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Chisunori Maeda, 686, Owada-Shinden, Yachiyo-shi, Chiba-3 Chiba Plant, Matsuo Bridge Co., Ltd. 6-10 Tohoku Onagacho Dormitory

Claims (1)

[Claims] 1. A single-layer frame main frame 2 of a dome structure having a polygonal grid pattern of quadrangle or more is constituted by rigidly joining a large number of frame members 1, and each polygon in the single-layer frame main frame 2 is formed. The in-plane shear rigidity reinforcing member 3 is arranged in the frame space, and the in-plane shear rigidity reinforcing member 3 is arranged.
A single-layer frame structure of a dome structure in which is pin-joined to a rigid joint portion of a frame member 1 forming a polygonal frame space.