JPS5830891Y2 - structural steel - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to structural steel materials used in steel frame structures.

The steel structure combined with steel materials is easy to work with, durable,
Because of its advantages such as earthquake and wind resistance, it is widely used in structures such as houses, factories, and bridges.

For large-scale structures, these structures are made by joining members such as columns and beams formed by combining a large number of square steel sections such as square steel sections and channel steel sections, but for small-scale structures. In this method, members such as columns and beams are each made of a single piece of steel, and the members are joined together.

In the former case, depending on the distribution of stress acting on the structure,
By changing the combination of the steel sections forming the member, it is possible to obtain a structure that is lightweight and wastes no material while satisfying the required strength.

However, in the latter case, since the cross-sectional shape of commercially available steel materials is constant over their entire length, if the steel section is selected to satisfy the strength at the location where the maximum stress is applied,
In the same member, more strength than necessary is given even to areas with low stress.

Therefore, compared to a structure in which each part of the member is made to have the required strength, it has the drawback of using unnecessary materials and increasing the weight of the structure.

Further, in order to reduce the weight of the member, a honeycomb material in which a number of hexagonal punched holes are formed in a web of H-beam steel or the like is used for the structure.

In manufacturing the honeycomb material, there is a disadvantage that the punched material becomes useless and cannot be used economically.

This invention was made to eliminate the above-mentioned drawbacks, and by simply adding a small amount of processing to commercially available section steel,
To provide a structural steel material that is lightweight compared to its strength and wastes less material.

Hereinafter, the present invention will be described in detail according to preferred embodiments shown in the accompanying drawings.

In this example, H-shaped steel 1 is used, and H-shaped steel 1 is used as shown in FIG.
A cutting line 4 is drawn on the web 2 of the section steel 1 along an inclined line 3 having an appropriate inclination with respect to the H section steel 1, in which trapezoidal protrusions a of height h are connected alternately. As shown in the figure, the H-section steel 1 is cut into half plates 5 and 6 along cutting lines 4.

Next, as shown in FIG. 3, one of the half-cut plates 6 is inverted, and the protruding portions a and a of the half-cut plates 5 and 6 are brought into contact with each other, so that the apex a' and the apex Weld a'.

By shaping the ends of the welded steel material, it becomes a steel material in which the width of the web 2 is changed and hexagonal through holes 10 are provided in the web 2, as shown in FIG.

The distance from the inclined line 3 to the corner at one end of the web 2 of the H-shaped steel 1 is tl, t2, and the distance from the other end to the corner is t3. Assuming t4, the width of the end A of the obtained steel material is t3 + d + t2 + d = t3 + t2
+2d, and the width of the end B of the steel material is t1+d+t
4+d=tl+t4+2d.

Further, the size and number of the through holes 10 are determined by the height d of the protrusion a and the length of the top side a'.

By selecting these values appropriately, the width of the steel material,
By changing the size and number of through holes, it is possible to obtain a steel material with strength that corresponds to the stress distribution.

According to the structural steel material according to the present invention, in the structure shown in FIG. 5 as an example of the usage state, the wide end of the steel web that becomes the pillars 15 and the cross beams 16 is placed in the eave part that particularly requires strength. The narrow end portion A of the steel web is placed at the root of the column 15 and the ridge of the cross beam 16, which do not require relatively strength, to achieve a streamlined configuration according to the stress distribution. Is possible.

Further, since the web 2 can be made of a so-called honeycomb material having hexagonal through holes 10 without wasting material, the structure can be economically reduced in weight.

In addition, since only the top side a' of the protruding portion a is welded after cutting the H-section steel, there are few welding points and manufacturing is possible simply and quickly.

[Brief explanation of the drawing]

Figures 1 to 4 are diagrams showing step by step the manufacturing state of the steel material according to the present invention, Figure 1 is a plan view showing the H-beam before cutting, and Figure 2 is a plan view after cutting. Fig. 3 is a plan view showing a steel material in which one half plate of the cut H-beam is reversed and welded to the other half plate, and Fig. 4 is a perspective view of the H-beam with the end shaped. FIG. 5 is a perspective view showing the steel material shown in the figure, and FIG. 5 is a front view showing an example of the usage state of the steel material according to the present invention. 1...H-shaped steel, 2...web, 3.
...Incline line, 4...Cut line, 5,6...
...Half-cut board, 10...Through hole, a...
・Protrusion, a'...Top side.

Claims (1)

[Claims for Utility Model Registration] The H-shaped steel 1 is cut into half plates 5 along cutting lines 4 in which trapezoidal protrusions a are alternately continued along the inclined lines 3 on the web 2 of the H-shaped steel 1. The protruding portion a of each half-cut board 5, 6 is divided into half-cut boards 6 and one half-cut board is inverted. The apexes a / and a / of a are brought against each other, and the apex a′
and the top side a' are welded together.