JPH03293451A - Structural material - Google Patents

Abstract

PURPOSE:To improve the strength of a structural member by a method wherein a plate having lightening holes is radially disposed to the inner side of a circular outer peripheral member in a state that a section is formed in a polygoal shape, and is secured to the outer peripheral member by weld. CONSTITUTION:A plate 2 having lightening holes in a triangular and a circular shape is radially disposed to the inner side of a cylindrical member 1 used as a beam and a column in a state that a section is formed in a triangular and a square shape, and secured to the cylindrical member 1 by weld. This constitution enables provision of a structural member being light and high in strength.

Description

[Detailed Description of the Invention] "Object of the Invention" The present invention relates to the creation of a material for structures, which is relatively lightweight, has suitable strength and straightness as a beam material or column material, and is capable of providing internal strength. The object is to provide a material for structures that is advantageous in use and easy to manufacture.

(Industrial Application Field) Materials for use in various above-ground, underground or underwater structures.

(Prior Art) It is well known that beams, girders, columns, etc. are required to construct structures above ground, underground, or underwater, and these materials include solid bars, shapes, etc. A wide variety of materials are used, including pipe materials, lattice materials, and square materials.

The materials include steel, stainless steel, aluminum alloy, wood, concrete, vinyl chloride and other synthetic resins, and composites thereof.

Furthermore, various proposals have been made regarding the use of large copper tubes or square tubes as various structures themselves.

(Problem B to be solved by the invention) It is essential to obtain the required strength in the conventional materials for structures such as those mentioned above, and in order to obtain this strength, it is necessary to increase the wall thickness or thickness. is requested. However, a device with such a large wall thickness or diameter necessarily requires a large amount of steel, and is also heavy.

In addition, when using a heavy material as described above as a beam or girder, the middle part will flex, so it is necessary to install a support in the middle, and the pillar material also needs to be placed in the middle for support. It is necessary to support the structure using bars and cross members, which makes the construction of the structure complex and requires a large amount of material.Especially in recent years, large structures require the use of long and large materials. As a result, the structure becomes complicated, and it is not easy to obtain a structure with a large space with a simple configuration.

"Structure of the Invention" (Means for Solving the Problems) The present invention has been devised after repeated studies to solve the problems in the conventional products as described above, and is as follows.

1. A material for a structure, characterized in that polygonal plates are arranged inside a circular outer circumferential member along the axial direction of the outer circumferential member, and openings are formed in the plates.

(Function) By using a circular peripheral member, a material with no strength or directionality in usage can be obtained.

By arranging plates polygonally along the axial direction of the circular outer circumferential member inside the circular outer circumferential member, the edge portions of each plate attached by welding etc. act like vertical stripes, and each plate Since the material itself has a reinforcing effect, preferable strength and linearity can be achieved with a relatively small amount of steel. That is, since the amount of material is small, it is lightweight, and as described above, linearity and strength can be obtained, so that preferable linearity is ensured in long beam materials.

When attaching the edge of each plate to the inside of the circular outer peripheral member by welding, etc., use the boundary ridge line between the plates or the boundary between the curved surface and the flat surface of the plate to operate an automatic welding machine accurately, and use the edge of the plate to attach the edges to the inside of the circular outer peripheral member. In this case, workers can enter and work as needed, and automatic welding is generally used to easily perform the work. In some cases, a dotted opening may be made from the outside of the circular peripheral member to the abutting portion of the plate materials, and plug welding may be performed.

By forming the openings in the plate material arranged as described above, the weight of the plate material itself is reduced, and moreover, a lattice-like structure is formed in the remaining portion due to the opening, thereby ensuring its reinforcing effect. Further, the opening allows the space between the plate material and the circular outer peripheral member to communicate with the inside.

(Example) To explain a specific embodiment of the present invention as described above, as shown in FIG. Plate materials 2.2.2- are arranged in a polygonal shape, and the plate materials 2 are attached to each other or the outer peripheral body 1 and each plate material 2 are attached by welding portions 3 or plug welding 3a. One having an inner diameter of several thousand 1 can be appropriately adopted.

If welding between the circular peripheral member l and the outer surface of the plate material 2 as shown in Fig. 1 is disadvantageous in terms of man-hours or work operation, a groove is formed at the edge as shown in Fig. 6 (A). Both plate materials 2.2 and the outer circumferential member 1 can be joined by one welding 3 to the corner portion from the inside. This can be done only once when plug welding 3a is performed as shown in FIG. 6(B).

Each plate 2 installed as described above is provided with an opening 4 as shown in FIG. At the same time, the inclined portions 5a, 5a are formed symmetrically to form something like a lattice structure, thereby reducing the weight of the plates 2 themselves while maintaining support and reinforcing performance for the outer peripheral member 1.

The outer circumferential body 1 described above is generally perfectly circular, but may be oval or elliptical in some cases, and a perfectly circular body does not have any directionality in terms of strength or other properties. Even if the shape is elliptical or oblong, if the major axis is less than 1.5 times the minor axis, it has a characteristic of having little directionality.

In addition, as this outer peripheral body, in addition to the steel pipe by IJOE method,
It is possible to widely adopt pipes manufactured by any pipe manufacturing method such as electric resistance welded steel pipes and spiral steel pipes. When the material according to the present invention is used as a pillar material, it is natural that a tapered tube obtained by high frequency resistance welding may be used as the outer peripheral body 1. In this case, each of the above-mentioned plate materials may be a trapezoid will be adopted. Such a tapered tube has a small diameter on the distal end side, is lightweight, and is less likely to bend despite its long size.

Each plate material 2 may be made of a cast material, but in the present invention, which aims to reduce weight and also requires strength, it is clear that a rolled method is preferable, and in any case, the plate material 2 has an opening 4. The third step is to use what is provided.
As shown in Fig. 4, the shape of each opening 4 may be a right triangular one as shown in Fig. 3, or a circular one as shown in Fig. 4, or they may be assembled as appropriate. Although they can be used together, both side edges of each plate material 2 are connected, and a connecting portion remains between the both side edges. In addition to the rectangular shape shown in FIG. 1, the attachment of each plate 2 to the outer peripheral body 1 may be square, triangular, pentagonal, hexagonal, or hexagonal as shown in FIG. In any case, as mentioned above, the joint welded part of the plate material functions like a vertical strip with respect to the circular outer peripheral member 1, and as the number of corners of the polygon increases, the part that functions like a vertical strip increases. do.

Attachment of each plate material 2 to the circular outer circumferential body 1 is performed by a welding part 3. In the case of a relatively small diameter plate, the plate material 2 is set inside the outer circumferential body 1, and then an automatic welding machine or the like is applied to the outer circumference. It can be carried out accurately by entering into the member 1 and running along the butting ridges of the plates and the joining boundary line between the curved outer peripheral body 1 and the flat plate 2.

However, plug welds 3a can be made at appropriate intervals from the outside at the abutting portions of the plate materials 2 and the joint portions between the outer circumferential body 1 and the abutting portions. In addition, a large diameter outer peripheral body with an inner diameter exceeding 2 m
In the case where the welding method is adopted, the worker enters into the outer circumferential body 1 as appropriate, but in both cases, the circular outer circumferential body 1 acts as one welding jig, so the entire welding The welding part 3 of any part is rotated as appropriate.
It can be performed in downward welding, which is the easiest welding position to form, and upward welding does not require a full welding position, so it can be easily welded.

As mentioned above, the side edges of the plates 2 attached at the welds 3 are butted against each other at the welds 3, and since they are fixed at the welds 3, the length direction of each plate material 2 is As mentioned above, it acts like a vertical stripe along the
Furthermore, deformation in the circumferential direction when external pressure is applied to the outer circumferential body 1 is restrained at the welded portion 3, so that the wall thickness of the outer circumferential body 1 can be sufficiently reduced. For example, if the product according to the present invention is designed as a large diameter steel pipe with an inner diameter of 250 cm or more and is adopted as an underground structure whose interior can be used as a warehouse or living area, if the steel pipe is simply used, the thickness will be 20 cm. This results in a significant increase in weight, a significant increase in the size of the pipe-making equipment, whether it is the UOE method or the spiral pipe-making method, and the difficulty in performing the forming action. Increases processing energy. On the other hand, as described above, the welded parts 3 and 3a obtain a longitudinal reinforcement effect, restrain deformation due to external pressure, etc., and the plate materials 2, 2.2.2 provide a reinforcing effect. It is sufficient that the inner diameter is generally 10 tm or less, especially 81 tm or less, and this greatly simplifies and facilitates the pipe-making equipment or pipe-making work, and also reduces the weight of the material in general, and this relationship holds true for relatively small-diameter pipes. The same applies to the case, and it brings about a reduction in the cost of materials. Moreover, since the plate material 2.2 as described above prevents bending and other deformation, in combination with the above-mentioned lightness, straightness can be ensured even as a long beam material or column material.

When the plate material 2 with the openings is installed as described above is used as a pillar material, the inside thereof can be appropriately filled with concrete, etc., and the bondability with the filled concrete is improved. Furthermore, the area filled with concrete is partitioned by the plate material 2, and the inside thereof can be used as an insertion area for various types of piping, wiring, etc. When a relatively large-diameter structure is used as an underground or underwater structure, the space between the plate material 2 and the outer peripheral body 1 is used as a passage area for the piping or wiring or as a storage area for tools and equipment. The spaces between the planks 2.2.2.2 are used as living quarters and passageways.

The material according to the present invention is typically made of steel, but it can also be made of stainless steel, aluminum, synthetic resin, or the like.

"Effects of the Invention" According to the present invention as explained above, it is possible to obtain strength and other properties without directionality, reduce the weight of the material used to form the structure, and ensure proper straightness, which is advantageous. This invention is industrially very effective because it allows the formation of various types of structures.

[Brief explanation of the drawing]

The drawings show the technical content of the present invention, in which Fig. 1 is an end view of the structural material according to the invention, Fig. 2 is a partially cutaway side view thereof, and Fig. 3 is a plate thereof. FIG. 4 is a partial front view of one example; FIG. 4 is a partial front view of another embodiment thereof; FIG. 5 is an end view similar to FIG. 1 showing another embodiment of the invention; FIG. FIG. 6 is a partial end view of a plate welded portion to a circular peripheral member. However, in these drawings, ▪ indicates a circular peripheral member, 2 indicates a plate material, 3 indicates a welded portion, 4 indicates an opening, 5 indicates a remaining portion, and 5a indicates an inclined portion. Flower (A) ■ (B)

Claims (1)

[Claims] 1. A material for a structure, characterized in that polygonal plates are arranged inside a circular outer circumferential member along the axial direction of the outer circumferential member, and openings are formed in the plates.