JPH0522704U - Connection between square steel column and beam - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the accuracy and strength of the steel frame structure by facilitating the joining of square steel pipe columns and beams by devising the joining hardware. [Structure] An inner joint metal fitting 3 having a substantially H-shaped vertical cross section is inserted into a square steel pipe pillar 1, and an outer joint metal fitting 4 made of a T-shaped metal fitting is arranged on the outer surface of the square steel pipe pillar 1 to form an inner joint metal fitting 3. The outer joining metal pieces 4 are joined together with bolts 5. The H-shaped steel beam 2 is bolted to the web 4a of the outer joint metal 4. The inner joint metal piece 3 is a combination of two H-shaped metal pieces in a direction orthogonal to each other, and the webs 3a are superposed on each other and integrated by a fillet weld 8 or the like. A nut 7 is welded to the flange of the inner joint metal piece 3 on 3b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of a joint between a square steel tubular column and an H-shaped steel beam, and is mainly used for steel-framed building structures.

[0002]

[Prior Art]

 According to the invention described in Japanese Patent Publication No. Sho 62-2087, when the prismatic steel column and the H-shaped steel beam are joined by bolt joining, they are as shown in FIGS. 8 and 9.

That is, at a predetermined position of the rectangular steel pipe column 11, a threaded hole 16 or a welded metal nut 13 having a vertical H-shaped cross section (see FIGS. 10 (a) and 10 (b)) is inserted, and the weld metal is inserted. The T-shaped metal fitting 14 is arranged on the outer surface of the rectangular steel tube column 11 so as to correspond to the object 13, and the two are joined by the bolts 15. Further, the T-shaped metal fitting 14 and the H-shaped steel beam 12 are connected by the bolt 15. It is joined. In addition, a shear plate 18 for in-situ welding is provided on the side surface of the rectangular steel tube column, and is bolted to the web of the H-shaped steel beam 12.

[0004]

[Problems to be solved by the device]

 In the case of the above-mentioned joining portion, although the force transmission is clear, the method of manufacturing the joining metal piece 13 having an H-shaped vertical section poses a problem. That is, it is either assembling by welding or casting, and the manufacturing of the hardware is very troublesome.

In the case of assembly by welding, the first problem is that the metal joint 13 is a butt-welded assembly. That is, it is necessary to provide the plate with a groove as shown in FIG. 11 (a).

Secondly, there is a problem of plate deformation due to welding heat. That is, the plate is deformed by the heat of welding as shown in Fig. 11 (b), and when the weld metal 13 and the square steel pipe column 11 are subjected to high-strength bolt friction welding, the plate of the weld metal 13 (flange portion) The gap between the inner surface of the column and the deformation of the column becomes a big problem.

The third problem is the accuracy of the metal joint 13. That is, the joint metal 13 must be inserted into the pillar 1 and mounted inside by some method. At this time, the size of the metal joint 13 must be slightly smaller than the inner diameter. Performing this relatively delicate dimensional adjustment by welding assembly is a difficult point in connection with the second problem described above.

Although there is no problem of dimensional adjustment and heat distortion in the case of casting, the poor work efficiency due to the production of casting molds one by one cannot be overlooked.

The present invention has been made in order to solve the above-mentioned drawbacks, and an object thereof is to facilitate the connection of a rectangular steel pipe column and a beam, reduce the cost, and further improve the accuracy and strength of the steel frame structure. I am trying.

[0010]

[Means for Solving the Problems]

 Hereinafter, a joint between a rectangular steel tube column and a beam of the present invention will be described with reference to the drawings corresponding to the embodiments.

The joint portion of the present invention joins a column and a beam by bolting, and an inner joint metal 3 having a substantially H-shaped vertical cross-section is inserted into the square steel pipe column 1 to An outer joint metal 4 made of a T-shaped metal is arranged on the outer surface, and the inner joint metal 3 and the outer joint alloy 4 are joined together by a bolt 5 penetrating the pipe wall of the square steel pipe column 1. Further, the H-shaped steel beam 2 is bolted to the web 4 a of the outer joint metal 4. If necessary, a shear plate may be provided on the outer surface of the rectangular steel tube column 1 and bolted to the web of the H-shaped steel beam 2 as in the case of the above-described conventional example.

The inner joint metal piece 3 is a combination of two H-shaped metal pieces having vertical flanges 3b at both ends of a horizontal web 3a, which are arranged in directions orthogonal to each other, and the webs 3a are overlapped with each other. Then, the fillet weld 8 or the bolt 8a is used for integration.

Further, bolt connection can be facilitated by forming the screw hole 6 in the flange 3b of the inner joint metal piece 3 or by welding the nut 7 in advance.

[0014]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

2 to 5 show examples of the inner joint metal piece 3 used for the joint portion of the present invention.

FIG. 2 shows an H-shaped metal piece used for assembling the inner joint metal piece 3, which comprises a horizontal web 3a and vertical flanges 3b at both ends. This H-shaped metal product can be obtained easily and in a large amount by cutting it out from an existing H-shaped steel, for example. A screw hole 6 or a nut 7 is provided in the flange 3b portion as shown in the figure.

As shown in FIGS. 3 and 4, two of these H-shaped metal parts are overlapped with each other in two directions orthogonal to each other, and the overlapped webs 3 a are integrated by fillet welding 8 to obtain a vertical cross section. Form a substantially H-shaped inner joint metal piece 3. As described above, since the inner joint metal 3 is a fillet-welded assembly, no groove is required, and since the welded portion is the H-shaped metal web 3a, the influence of welding heat on the deformation of the flange 3b is small.

FIG. 5 shows an example in which the webs 3a of the H-shaped metal article are joined together by the bolts 8a. Of course, the fillet welding shown in FIG. 4 and the bolt joining shown in FIG. 5 may be used together.

Further, the inner surface of the steel pipe usually has a weld bead 19 (see FIGS. 6 and 7), and it is necessary to devise a method in which the inner joint metal 3 does not interfere with this. As a solution to this problem, in the embodiment of FIG. 6, a filler plate 20 is inserted into the wall surface having the weld bead 19, and in the embodiment of FIG. 7, a groove 21 of a size that allows the weld bead 19 to be preliminarily passed over the flange 3b of the inner joint metal piece 3. Is provided.

FIG. 1 shows an embodiment of a joint between a square steel tube column and an H-shaped steel beam according to the present invention. An example of the construction procedure is as follows.

In the factory, the above-mentioned inner joint metal piece 3 is inserted into the rectangular steel tube column 1 in correspondence with the positions of the upper and lower flanges 2b of the H-shaped steel beam 2. At the same time as setting the inner joint metal piece 3 to a predetermined position, the temporary fixing bolt 9 is inserted into the screw hole provided in the inner joint metal piece 3 to temporarily fix the square steel pipe column 1 and the inner joint metal piece 3.

It is transported to the construction site by a truck or the like.

While removing the temporary fixing bolt 9, the outer joint metal 4 at the position of the lower flange 2b of the H-shaped steel beam 2 is arranged on the outer surface of the square steel pipe column 1 and fixed by the inner joint metal 3 and the bolt 5 at corresponding positions. To do.

The rectangular steel pipe pillar 1 is started up.

The H-shaped steel beam 2 is placed on the lower outer joint metal 4 previously fixed with.

The upper outer joint metal 4 is bolted to the upper flange 2 b of the H-shaped steel beam 2 in advance, and the outer joint metal 4 and the square steel pipe column 1 are coupled by the bolt 5 while removing the temporary fixing bolt 9. ..

[0027]

[Effect of the device]

 In the joint part of the present invention, the H-shaped metal pieces cut out from the existing H-shaped steel are overlapped with each other and assembled by fillet welding or bolts, so that they are suitable for mass production and significantly improve the work efficiency and reduce the cost. Can be made

In addition, since the column and the beam are not cut into short pieces at the beam-column joint, the accuracy of the frame can be improved.

Further, since the metal joint hardly comes out of the column surface, it is efficient in transportation.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main portion of an embodiment of a joint portion of the present invention.

FIG. 2 is a perspective view of an H-shaped metal piece that is a component of the inner joint metal piece used in the present invention.

FIG. 3 is a front view showing an example of an inner joint metal piece used in the present invention.

FIG. 4 is a plan view showing an example of an inner joint metal piece used in the present invention.

FIG. 5 is a plan view showing an example of an inner joint metal piece used in the present invention.

FIG. 6 is a plan view showing another example of the inner joint metal piece used in the present invention together with a square steel pipe column.

FIG. 7 is a plan view showing still another example of the inner joint metal used in the present invention together with a square steel pipe column.

FIG. 8 is a perspective view showing a conventional example.

9 is a vertical sectional view corresponding to FIG.

FIG. 10 shows an inner joint metal piece in a conventional example, (a) is a plan view and (b) is a vertical sectional view.

11A and 11B are views for explaining problems in the conventional example.

[Explanation of symbols]

1 ... Square steel tube column, 2 ... H-shaped steel beam, 2a ... Web, 2b
… Flange, 3… Inner joining hardware, 3a… Web, 3b…
Flange, 4 ... Outer joining metal fitting, 4a ... Web, 4b ... Flange, 5 ... Bolt, 6 ... Screw hole, 7 ... Nut, 8 ... Fillet weld, 8a ... Bolt, 9 ... Temporary fastening bolt, 19 ...
Weld beads, 20 ... Filler plate, 21 ... Groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Keiichi Takada 1-3-1 Otemachi, Chiyoda-ku, Tokyo Sumitomo Metal Industries, Ltd. (72) Koji Fukuda 1-1-1 Otemachi, Chiyoda-ku, Tokyo No. 3 Sumitomo Metal Industries, Ltd.

Claims (2)

[Scope of utility model registration request] 1. An H-shaped metal piece having vertical flanges at both ends of a horizontal web is arranged in directions orthogonal to each other, and the webs of the H-shaped metal pieces are integrated in a state of being overlapped with each other, and The flange is in contact with the inner surface of the prismatic steel column to form an inner joint metal having a substantially H-shaped vertical section, and the inner joint metal is inserted into the prismatic steel pipe column, and the outer surface of the prismatic steel pipe column is perpendicular to the horizontal web. An outer joining metal article made of a T-shaped metal article having a flange is arranged, the inner joining metal article and the outer joining metal article are joined with a bolt penetrating a pipe wall of the square steel pipe column, and further, the web and the H of the outer joining metal article are arranged. A joint between a square steel column and a beam, characterized in that the flange of the shaped steel beam is joined by bolts. 2. The joint between a square steel pipe column and a beam according to claim 1, wherein a screw hole or a nut for bolting the outer joint metal to the outer joint metal is provided on the flange of the inner joint metal.