JPS6251338B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a three-dimensional frame structure constructed by connecting a large number of rod-like members vertically, horizontally, or diagonally through joints.

This type of three-dimensional frame structure forms the basic framework of, for example, a layered module developed for the purpose of three-dimensionally utilizing space. FIG. 1 shows an example of this, in which the rod-shaped member 1 has a central part,
Joint 2 to form a triangular prism-shaped space A.
Horizontal, vertical, and diagonal rod-like members 1 are arranged diagonally through the joints 2 and connected via joints 2 on the outside, forming a layered space B. The space A is used, for example, as a shopping center, and the space B is used for constructing artificial land or unit housing. Furthermore, a natural park such as an artificial forest can be constructed in the upper space C of the upper horizontal member. Note that a core shaft 3 standing upright in the center of the space A is a space where stairs and elevators are formed, and this core shaft 3 and the space B are connected via a passage 4.

However, in such a three-dimensional frame structure, both the bar member 1 and the joint 2 are conventionally made of steel. A three-dimensional frame structure made of steel has excellent mechanical properties and can withstand loads, shocks, vibrations, etc., but when it becomes large like the above-mentioned layered structure module, fire-resistant coating is required for disaster prevention. , maintenance using corrosion-resistant paint is required, and the required precision in assembling and constructing the frame is higher than necessary, making construction difficult.

The present invention was made with the aim of obtaining a three-dimensional frame structure that has physical properties equivalent to or better than those of a frame structure made of steel, and that requires virtually no fireproof coating or maintenance, and is easy to construct. in,
The present invention is characterized by focusing on the use of prestressed concrete material as the rod-shaped member, and in that the connecting portions protruding from both ends of the concrete material are inserted and fixed into through holes drilled in the joint.

The invention will now be described with reference to illustrated embodiments. The rod-shaped member 10 used in the three-dimensional frame structure of the present invention has a second
Buried steel rod 1 with tension P applied as shown in the figure
A concrete material 12 is poured around the concrete material 1 using a formwork, and after this concrete material 12 is hardened, the above tension P is removed to form prestressed concrete.
It is made of concrete material. This concrete material has excellent physical properties not only against compressive force but also against tensile force below a certain value because tension remains in the buried steel rod 11 and this acts to compress the concrete material 12 in a free state. is known to show. Both ends of the buried steel rod 11 constitute a connecting portion 13 protruding from the concrete 12, and a screw 14 is screwed into this connecting portion 13. It is preferable that the number of connecting parts 13, that is, the number of buried steel rods 11, be an appropriate number of two or more.

On the other hand, the joint 20 for connecting the rod-like members 10 is provided with a plurality of through holes 21 through which the connecting portions 13 are inserted, depending on the number and position of the rod-like members to be connected, as shown in FIG. , same figure A
A sphere 20A like this and a polyhedron 20B like the same B
It can be done. When using the spherical joint 20A, the concrete material 12 of the rod-shaped member 10
It is preferable that the end face be a concave spherical surface commensurate with the spherical diameter. When using the polyhedral joint 20B, the position of the through hole 21 is determined so that the end face of the planar concrete material 12 comes into contact with the planar part of the joint. Of course, the directions and positions of the plurality of through holes 21 must be determined so that they do not interfere with each other.

In order to construct a three-dimensional structure using the rod-shaped members 10 and joints 20, the rod-shaped members 10 are erected at the site by appropriate means, and a joint is inserted between the ends of the rod-shaped members 10 to be connected as shown in FIG. 20, insert the connecting part 13 into the through hole 21, screw the nut 15 onto the threaded part 14 of the connecting part 13, and tighten it, then the rod-like members 10 can be connected to each other via the joint 20. can. The gap between the through hole 21 and the connecting portion 13 may be appropriately filled with mortar. The above sequence is repeated to construct a three-dimensional structure of a desired shape.

Although the joint 20 can be made of steel, it is preferably made of concrete, particularly prestressed concrete like the bar member 10. Joint 20 eliminates the need for fireproof coating on the entire frame and is maintenance-free.
This is because it is not inhibited by.

Furthermore, in the above embodiment, the connecting portion 13 and the joint 2
0 is shown as a screw connection, but it goes without saying that the two may be fixed by other means such as welding or bending after the connecting portion 13 is inserted.

In summary, since the present invention uses prestressed concrete material as the rod-shaped members that are the constituent members of the three-dimensional structure, it does not require maintenance such as fire-resistant coating or corrosion-resistant paint like steel materials, and is equivalent to or better than steel materials. physical strength can be obtained. Moreover, this rod-shaped member has the feature that it is easy to construct because it can be connected by a simple operation of inserting and fixing the connecting portion protruding from the end into the through hole of the joint.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of a three-dimensional frame structure of a layered module, Fig. 2 is a sectional view showing an example of a rod-shaped member used in the three-dimensional frame structure according to the present invention, and Figs. 3 A and B are perspective views of a joint. , FIG. 4 is a perspective view showing an example of a connected state of the rod-shaped members. DESCRIPTION OF SYMBOLS 10... Rod-shaped member, 11... Buried steel rod, 12... Concrete material, 13... Connection part, 20... Joint,
21...Through hole.

Claims (1)

[Scope of Claims] 1. In a three-dimensional frame structure constructed by connecting the ends of a plurality of rod-shaped members arranged vertically and horizontally or diagonally through joints, the rod-shaped members are constructed of prestressed concrete material, and A three-dimensional frame structure characterized in that both ends of a steel rod buried in the longitudinal direction within a concrete material are made to protrude from the concrete material to form a connecting portion, and the joint is provided with a through hole through which the connecting portion is inserted and fixed. structure. 2. The three-dimensional frame structure according to claim 1, wherein the joint is made of a polyhedron, and the through hole is provided so that the end surface of the rod-shaped member comes into contact with the flat surface of the joint. 3. The three-dimensional frame structure according to claim 1 or 2, wherein the joint is made of prestressed concrete material.