JP2718837B2 - Three-dimensional stringed arch dome and its construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional stringed arch dome reinforced with a tension member and a construction method thereof.

[0002]

2. Description of the Related Art In general, a three-dimensional arch or a three-dimensional truss dome is extremely advantageous structurally as a structural system for constructing a large span structure such as a gymnasium. Therefore, it is applied to the construction of a large building such as a gymnasium or a stadium. Conventionally, however, this type of arch structure or dome structure has been constructed by three-dimensionally assembling a number of single members made of a steel pipe or the like.

[0003]

However, conventional three-dimensional arches and three-dimensional truss domes not only require a large amount of single material, but also require a lot of manpower to assemble them. Was.

In order to construct a large span dome using only a radial arch, it is necessary to considerably increase the cross section of the arch member, which increases the weight of the entire structure and is disadvantageous in terms of earthquake resistance. In addition, there was a problem that the material cost was greatly increased, and that the construction space was inevitably restricted.

[0005] Further, there has been another problem that the structure of the joint and the entire structure are complicated, and the analysis of stress is also complicated, and the analysis cannot be performed without a computer.

[0006] Further, recently, a wooden arch dome utilizing a wooden material has attracted attention and has been actively constructed. However, there is a natural limit to the scale that can be constructed only with wood.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can reduce the use materials and the assembling work thereof as much as possible. It is an object of the present invention to provide a three-dimensional stringed arch dome and a method of constructing the same.

[0008]

A three-dimensional arched dome according to the present invention has a compression ring on the top and a lower structure on the outer periphery, and an arch material is provided between the compression ring and the lower structure. A plurality of arch materials are joined in a radial direction, and an upper end of each arch material is joined to the compression ring, a lower end of each arch material is joined to the lower structure, and a bundle material is arched to each of the arch materials. At the same time, the lower end of this bundle is joined to the bundle of adjacent arch materials, and a lower chord is placed between the compression ring and the lower structure. And the lower chord is joined to the upper and lower ends of the arch material and the lower end of the bundle, respectively, and a diagonal rod is provided between the arch and the lower end of the bundle. A plurality of ring cables are connected in a diagonal manner, and the ends are respectively joined to the lower ends of the arch material and the bundle material, and a plurality of ring cables are concentrically bridged between adjacent arch materials. It is constituted by joining a cable to the lower end of the bundle respectively.

In the construction method of the three-dimensional string arch dome according to the present invention, when the three-dimensional string arch dome is constructed, the lower structure is constructed on the outer periphery on the ground and a compression ring is formed in the center. An arch material, a bundle material, a lower chord material, and a diagonal rod are respectively installed between the compression ring and the lower structure, and these members are joined to each other, and then the compression ring is gradually pushed up, and at the same time, the lower structure Gradually move to the center side, the compression ring,
The arch material, the bundle material, the lower chord material and the diagonal rod are deployed in an arch dome shape, and then the joint between the compression ring and the upper end of the arch material is fixed, and the lower end of the arch material and the lower structure And, next, bridge multiple concentric rings between adjacent arch materials,
The ring cables are respectively joined to the lower ends of the bundle, and the support of the compression ring is released.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to an embodiment which illustrates the present invention. FIG. 1 shows an entire three-dimensional stringed arch dome according to the present invention, and FIGS. 2 to 7 show details of each part thereof. 8 to 18 show a construction method of a three-dimensional string arch dome according to the present invention. In the drawing, reference numeral 1 denotes an arch material, 2 denotes a bundle material, 3 denotes a ring cable, 4 denotes a lower chord material (hereinafter referred to as “lower rod 4”), 5 denotes a diagonal rod, 6 denotes a compression ring, 7 denotes a boundary ring, and Reference numeral 8 denotes a lower structure.

The arch material 1 is formed by tying two or more wood-based laminated members formed in a vertically long rectangular cross-sectional shape, and the bending rigidity around the weak axis is sufficiently ensured. Further, the arch material 1 is configured as an assembly material in which a plurality of straight members 1a, 1a are rigidly joined in the longitudinal direction thereof, and is devised so that assembly at the site is also possible.

The transmission of the stress at the joint A between the straight members 1a, 1a directly transmits the compressive stress by so-called wood touch, and the bending and tensile force at the joint B between the arch material 1 and the compression ring 6 will be described later. In this structure, the shearing force is transmitted by the joining bolt 9 and the shearing force is transmitted by the joining bolt 9 to the shearing force of the sandwiching plate 1b (see FIGS. 5 and 6).

The arch material 1 constructed as described above is radially bridged between the compression ring 6 at the center of the dome and the lower structure 8 on the outer periphery of the dome, and the upper end and the lower end thereof are connected to the compression ring 6 and the lower structure. A plurality of connecting bolts 9 and a sandwiching plate 1b
And are respectively joined by. In addition, arch material 1
FIGS. 5 and 6 show the joint between the upper end of the ring and the compression ring 6. FIG.

At least two upper and lower joining bolts 9 are used at the joint B between the upper end of the arch material 1 and the compression ring 6 (see FIGS. 5 and 6), and the joint before the final tightening is freely rotated. I can do it. Also, the joint between the lower end of the arch material 1 and the lower structure 8 can be freely rotated before the main fastening (substantially the same as the details shown in FIGS. 5 and 6).

A bundle 2 is vertically suspended at each joint between the linear members 1a and 1a of the arch 1 in an inverted V-shape that gradually spreads on both sides of the arch 1. 2 (see FIGS. 2, 4, and 7). As the bundle 2, a steel pipe such as an H-section steel, a steel pipe such as a round steel pipe or a square steel pipe is used.

The ring cable 3 is connected to the adjacent arch material 1,1.
A plurality of the arch materials 1 are concentrically spanned therebetween and are joined to the lower ends of the bundles 2, respectively, so that the arch materials 1 are restrained from spreading outward by the ring cables 3 (FIGS. 2, 4, 7). See). Although a wire is mainly used for the ring cable 3, a PC steel rod may be used.

The lower chord rod 4 is radially bridged between the compression ring 6 and the lower structure 8, and is joined to the upper and lower ends of the arch material 1 and the lower ends of the bundles 2 (FIG. 2, FIG. 2).
3,4,7). The diagonal rod 5 is provided between the joint A of the arch material 1 (the joint between the straight members 1a) and the lower end of the bundle 2, between the lower end of the arch 1 and the lower end of the bundle 2, and of the arch 1. It is stretched diagonally between the upper end and the lower end of the bundle 2. Thus, the lower chord rod 4 and the diagonal rod 5 constitute a three-dimensional string truss which is mechanically very advantageous with the arch material 1 and the bundle material 2 and have a function of a brace against asymmetric load. In addition, although the PC steel bar is mainly used for the lower string rod 4 and the diagonal rod 5 similarly to the ring cable 3, it goes without saying that wires may be used.

The compression ring 6 is formed in a circular ring shape and has an inner ring 6a and an outer ring 6b installed concentrically.
A plurality of connecting members 6c and diagonal members 6d are radially bridged between them (see FIGS. 5 and 6). Note that a steel material such as a square steel pipe is used for the inner ring 6a, the outer ring 6b, the connecting member 6c, and the diagonal member 6d.

The boundary ring 7 is bridged between the lower ends of the adjacent arch members 1 in a circular ring shape along the outer periphery of the dome, and the lower end of the arch member 1 does not spread outward due to the boundary rings 7. (Figs. 2, 4,
7).

The lower structure 8 is mainly made of reinforced concrete or steel frame reinforced concrete, and the lower structure 8 supports each arch material and thus the entire dome.

In such a configuration, the arch material 1, the bundle material 2 and the compression ring 6 function as a compression material against an external force, and the ring cable 3, the lower string rod 4, the diagonal rod 5 and the boundary ring 7 function as a tension material. The bundle member 2 serves to connect the arch member 1 and the ring cable 3 so as to prevent the arch member 1 from spreading out, and cooperates with the diagonal rod 5 to prevent the arch member 1 from buckling. It also works great as a material.

A membrane material (not shown) made of Teflon glass fiber cloth or the like is attached as a roofing material between the arch materials 1 and 1 of the dome hut as constructed above. The membrane material is fixed between the arch materials 1 and 1 by a membrane holding cable (not shown) running in the center valley line.

Next, the construction method of the three-dimensional string arch dome according to the present invention will be described in order (see FIGS. 8 to 18).
.

(1) After the lower structure 8 is constructed or before the lower structure 8 is constructed, a guide rail 10 is temporarily provided outside the lower structure 8 (see FIG. 8). The guide rails 10 are temporarily provided radially on an extension of each arch material 1 to be installed. Also, the gantry 11 is assembled at the center, and the compression ring 6 is assembled thereon.

(2) Next, the arch material 1, the bundle material 2, the lower chord rod 4, and the diagonal rod 5 are installed between the lower structure 8 and the compression ring 6, and these members are joined to each other (FIG. 9,10,11). At this time, the upper end of each arch material 1 is rotatably joined to the compression ring 6 by a joining bolt 9.

The arch material 1 is assembled so as to lie between the tip of the guide rail 10 and the gantry 11. Also,
Only one joining bolt 9 is tightened to temporarily join the arch material 1 and the compression ring 6 so that the joint between the arch material 1 and the compression ring 6 can rotate freely.

At the lower end of each arch material 1, a roller which can run on the guide rail 10 or a guide rail 10
Attach a shoe that can slide on the. Further, each arch material 1 is fixed by a plurality of tie rods 12 so as not to be deformed (see FIGS. 10 and 11).

(3) Next, the compression ring 6 is gradually pushed upward by gradually raising the pedestal 11 at the center, so that the compression ring 6, the arch material 1, the bundle material 2, the lower chord rod 4, the diagonal rod 5 into an arch dome shape (Fig. 12
To FIG. 16).

The pedestal 11 is raised by successively adding the columns 12. When the compression ring 6 is gradually pushed upward just above, the arch material 1 is gradually built up, and accordingly, the outer ends of the arch materials 1, 1 are placed on the guide rails 10, 10 at the center of the dome. Slide gradually to the side.

(4) Next, when the compression ring 6 is pushed up to a predetermined height, the remaining joint bolts 9 are tightened so that the joint between the compression ring 6 and the upper end of each arch material 1 is not rotated, and the compression ring 6 is fixed. Completely join each arch material 1 (Fig.
14, 5, 6).

The lower ends of the arch members 1, 1 are placed on the lower structure 8, and are completely rigidly joined to the lower structure 8.
Further, the lower ends of the bundles 2 adjacent to each arch 1 are joined.

(5) Next, a plurality of ring cables 3 are looped concentrically between the adjacent arch members 1 and 1, and the ring cables 3 are joined to the lower ends of the bundles 2, respectively. In addition, the ring cable 3 is the arch material 1,
Temporarily attach to one.

(6) Finally, the guide rail 10 and the gantry
11 and the tie rod 12 are removed, and the support of the compression ring 6 is released. (See Figure 16). When the gantry 11 and the tie rod 12 are removed, a tensile force is introduced into the ring cable 3, the lower string rod 4, and the diagonal rod 5 by the own weight of the arch material 1, and a compressive force is introduced into the arch material 1 and the bundle material 2, respectively. As a result, the entire hut is structurally hardened.

The three-dimensional string arch dome can be constructed by the above assembling method. When the assembling of the hut assembly is completed, the roof is covered with the membrane material.

[0035]

Since the present invention has the above configuration, it has the following effects.

(1) Since all members other than the arch material are made of wires such as spiral cables or small-cored strings such as PC steel rods, there are great restrictions such as the building space being narrowed by the structural material. There is no problem, and the building space can be as large as possible.

(2) Further, since a large number of single members made of steel pipes or the like are not required unlike the related art, the structural calculation can be simplified and the material cost can be reduced. Can be largely omitted.

(3) Since the upper ends of the respective arch members are not directly joined to each other but are individually joined to the compression ring, the joining of the upper ends of the arch members can be made extremely simple. .

(4) When a wooden arch is used, the surface of the wooden material can be maximized, so that a wooden arch dome can be constructed by making the best use of the wooden material. Spanning is also easily possible.

(5) Since it is not necessary to bridge a connecting member for connecting these members between adjacent arch members, it is easy to attach a finishing material such as a film material on the arch member.

(6) At the same time as removing the base at the center of the dome,
The tensile force is introduced into the ring cable and the diagonal rod by the weight of the arch material, and the entire hut is structurally hardened. Therefore, it is not necessary to introduce tension into these members.

(7) Since all main structural materials such as arch materials can be assembled on the ground, not only a crane or other lifting machine for lifting the structural materials above the ground is unnecessary, but also dangerous work at heights is required. This greatly reduces work safety, and improves construction accuracy.

(8) Since the arch material is supported at the lower end portion and the upper end portion thereof and gradually moved to the center of the dome for installation, it is easy to manage and adjust the position of the arch material during installation. There are other effects as well.

[Brief description of the drawings]

FIG. 1 is a plan view of a three-dimensional string arch dome.

FIG. 2 is a partial plan view of a three-dimensional string arch dome.

FIG. 3 is a partial side view of the three-dimensional stringed arch dome.

FIG. 4 is a partial longitudinal sectional view of a three-dimensional string arch dome.

FIG. 5 is a partial plan view of a compression ring.

FIG. 6 is a partial side view of a compression ring.

FIG. 7 is a partial perspective view of the three-dimensional string arch dome.

FIG. 8 is a process diagram showing a construction method of a three-dimensional stringed arch dome.

FIG. 9 is a process diagram showing a construction method of a three-dimensional string arch dome.

FIG. 10 is a process diagram illustrating a construction method of a three-dimensional stringed arch dome.

FIG. 11 is a process diagram showing a construction method of a three-dimensional stringed arch dome.

FIG. 12 is a process diagram showing a construction method of a three-dimensional stringed arch dome.

FIG. 13 is a process diagram showing a construction method of a three-dimensional stringed arch dome.

FIG. 14 is a process chart showing a construction method of a three-dimensional string arch dome.

FIG. 15 is a process chart showing a construction method of the three-dimensional string arch dome.

FIG. 16 is a process diagram showing a construction method of a three-dimensional stringed arch dome.

FIG. 17 is a partial plan view of the three-dimensional string arch dome under construction.

FIG. 18 is a partial side view of a three-dimensional stringed arch dome under construction.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... arch material, 2 ... bundle material, 3 ... ring cable, 4 ... lower string rod (lower string material), 5 ... diagonal rod, 6 ... compression ring, 7 ... boundary ring, 8 ... lower structure, 9 ... joining pin, 11 ... stand, 12 ... tie rod.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaru Ozaki Kashima Construction Co., Ltd. 1-2-7 Moto-Akasaka, Minato-ku, Tokyo (72) Inventor Hiroetsu Kuwahara 6-13 Nakamachi, Naka-ku, Hiroshima-shi Kashima Construction Co., Ltd. In the Hiroshima branch of the company (72) Inventor Takeshi Takahashi Kashima Construction Co., Ltd. 1-2-7 Moto Akasaka, Minato-ku, Tokyo Kajima Construction Co., Ltd. (72) Inventor Seiji Agawa 1-2-7 Moto-Akasaka, Minato-ku, Tokyo (72) Inventor Shin Yoshida Shin Kashima Construction Co., Ltd. 1-2-7 Moto-Akasaka, Minato-ku, Tokyo (56) References JP-A-3-241128 (JP, A)

Claims (2)

(57) [Claims] 1. A compression ring is provided on a top portion and a lower structure is provided on an outer peripheral portion. A plurality of arch members are radially bridged between the compression ring and the lower structure, and upper ends of respective arch materials are provided. And the compression ring, the lower end of each of the arch members and the lower structure are respectively joined, and a bundle material is respectively suspended on each of the arch materials so as to spread in an inverted V-shape on both sides of the plurality of arch materials. Along with
The lower end of this bundle is joined to the bundles of the adjacent arches, and a plurality of lower chords are radially bridged between the compression ring and the lower structure. And the lower end of the bundle material, respectively, and a plurality of diagonal rods are bridged diagonally between the arch material and the lower end of the bundle material, respectively. A plurality of ring cables are concentrically bridged between adjacent arch materials, and a plurality of ring cables are joined to the lower ends of the bundle materials, respectively. Three-dimensional stringed arch dome. 2. The construction method of a three-dimensional string arch dome according to claim 1, wherein a lower structure is constructed on an outer peripheral portion on the ground, and a compression ring is provided at a central portion, and between the compression ring and the lower structure. While installing the arch material, bundle material, lower chord material and diagonal rod respectively, these members are joined together, then the compression ring is gradually pushed up, and at the same time, the lower structure is gradually moved to the center. The compression ring, arch material, bundle material, lower chord material and diagonal rod are deployed in an arch dome shape, and then the joint between the compression ring and the upper end of the arch material is fixed, and the lower end of the arch material is fixed. The lower structure is joined, and then a plurality of ring cables are looped concentrically between adjacent arch members, and the ring cables are joined to lower ends of the bundles, respectively. And constructing a three-dimensional stringed arch dome by releasing the support of the compression ring.