JP2001105171A - Method for welding steel frame beam and steel frame column, and joing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide joining of a steel frame beam and a steel frame column of high strength by increasing efficiency of working and reducing welding materials through omission of using a back strip. SOLUTION: A groove 5 having a slant surface 6 and a bottom surface 7 are formed on a flange 3 of a steel frame beam 1 made of a wide flange beam, and at the same time a joining tongue part 8 is formed on the bottom side of the groove 5 leaving a part of the flange 3. On a web 4 of the steel frame beam 1, a notched part 9 is formed. A steel frame column 2 and a steel frame beam 1 are arranged so as to abut a tip end of the joining tongue part 8 on the side surface of the steel frame column 2, the inner side of the flange 3 is welded 10 on a side surface of the steel frame column 2, welding metal 11 is stepwise built up on the joining tongue part 8 of the steel frame beam 1, and thus the inner side of the groove 5 is filled with the welding metal 11. Because of omission of use of a backing strip, assembling and welding work of the backing strip is omitted, so increasing of efficiency of working and reducing of welding materials are excecuted. Because of direct welding of the steel frame column and the steel frame beam, there is no fear of welding defects when using the backing strip, and welding of high strength is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding method and a joint structure for a steel column and a steel beam in a steel structure composed of a steel column and a steel beam, and more particularly, to omitting the use of a backing metal. And a method of directly welding and joining a steel column and a steel beam.

[0002]

2. Description of the Related Art FIG. 9 shows an example of a conventional method of welding a steel column and a steel beam in a steel structure. FIG. 9 is an enlarged view near the groove. In the figure, 21 is an H-shaped steel material as a steel beam, and 22 is a steel column. FIG. 9 shows only one flange 23 side of the welding side end of the steel beam 21, but the other flange side is welded so as to be vertically symmetrical therewith. A groove 23 is formed on the flange 23 of the steel beam 21. The tip of the web 25 is slightly longer than the tip of the flange 23 and extends to a position where it abuts against the joint surface of the steel column 22. A quarter arc-shaped notch 26 is formed. Backing metal 27 is flange 23
And is applied to the front end of the flange 23 through the notch 26. Backing money 2
7 is arranged so that the tip thereof coincides with the tip of the web 25, and is welded 28 to the flange 23 in advance. Then, the tip of the web 25 and the backing metal 27 are butted against the side surface of the steel column 22, and the backing metal 27 and the steel column 22 are welded 29. The flange 23 and the steel column 22 are welded 30. Weld 29,
30 is a full penetration weld. The portion indicated by the broken line is a penetration portion, but is dispersed at three locations.

[0003]

In the conventional welding method described above, an assembly of a backing metal and a welding step are added to the welding of the steel beam and the steel column. This is a relatively large burden. In addition, there are disadvantages such as a complicated welded portion, which easily causes welding defects, and that stress transmission is not smooth. Accordingly, an object of the present invention is to provide a welding method that can achieve high-strength joining while reducing the use of a backing metal and improving work efficiency and saving welding materials.

[0004]

According to the present invention, in order to solve the above-mentioned problems, a slope 6 inclined at a predetermined angle with respect to the welding-side end face of the flange 3 and a bottom face 7 parallel to the flange 3 are provided.
Is formed at the welded end of the flange 3 of the steel beam 1 made of an H-shaped steel material, and at the same time, the flange 3 is partially left on the bottom side of the groove 5 to form a joining tongue piece 8. Forming a notch 9 by cutting off a portion of the web 4 of the steel beam 1 near the welding-side end portion with the flange 3, and forming a notch 9 on the side surface of the steel column 2. Arranging the steel column 2 and the steel beam 1 so as to abut against each other, welding 10 the inside of the flange 3 at the welding end of the steel beam 1 to the side surface of the steel column 2, Joining tongue piece 8
And a step of filling the inside of the groove 5 with the welding metal 11 in order to weld the building steel column and the steel beam. In this case, the use of the backing metal is omitted. Therefore, the work of assembling and welding the backing metal is omitted, and the efficiency of the work and the saving of welding materials can be achieved. Since the steel column and the steel beam are directly welded, there is no need to worry about welding defects in the backing metal, and a high-strength joint can be obtained.

[0005]

Embodiments of the present invention will be described with reference to the drawings. 1 to 5 show a welding process according to the present invention in order. FIGS. 1 and 2 are front views of a welding side end of a steel beam, and FIGS. 3 to 5 show a steel beam and a steel column. 6 is an enlarged front view of a part of the joined state, FIG. 6 is a perspective view of a welded end of a steel beam having a groove formed, and FIG. 7 is an explanatory view showing a welded state of a welded portion.

In the drawing, reference numeral 1 denotes a steel beam made of an H-shaped steel material, and reference numeral 2 denotes a steel column made of an H-shaped steel material or a square steel pipe material. The steel beam 1 has a pair of opposed flanges 3 and a web 4 orthogonal to the flanges 3 and connecting the two flanges.
Here, the H-shaped steel material means, in addition to the H-shaped rolled steel material, a BH steel material formed by joining and welding three steel plates to an H-shape, and a central portion of a web of a rolled H-shaped steel material cut off to be formed on both sides. Includes a CT section steel leaving a pair of T-sections.

[0007] As shown in FIG.
A groove 5 is formed at the end on the welding side. The groove 5 has a slope 6 inclined at a predetermined angle with respect to the welding-side end face of the flange 3.
And a bottom surface 7 parallel to the flange 3. On the bottom side of the groove 5, a joining tongue piece 8 is formed with a part of the flange 3 remaining. Also, at the weld side end of the web 4 of the steel beam 1,
A notch 9 cut into a substantially 1/4 arc shape is formed near the joint with the flange 3.

[0008] Thus, as shown in FIG.
So that the tip of the steel column 2 abuts against the side of the steel column 2.
4 and the inside of the welding side end of the flange 3 is welded to the side surface of the steel column 2 as shown in FIG.
0 and assemble.

[0009] Next, as shown in FIG.
The welding metal 11 is piled on the joining tongue piece 7 of
Is filled with the weld metal 11.

FIG. 7 shows a fusion zone 12 formed at the joint between the steel beam 1 and the steel column 2 by welding performed in the above-described manner. At the joint, the base metal around the weld metals 10 and 11 is melted and melted into the weld metal without a break, indicating a strong bonding state.

Regardless of the size of the steel beam 1, the joining tongue piece 7
By setting the thickness to 2 mm to 4 mm and the width to 3 mm to 5 mm, particularly good bonding was obtained. If the joining tongue 7 is too thick or too wide, the molten portion of the base material by the welded portion 11 is fused to the molten portion of the base material by the welded portion 10 inside the flange, that is, full penetration welding. It is difficult to obtain a strong joint and waste of the weld metal occurs. If the joining tongue piece 7 is too thin, the joining tongue piece 7 tends to melt off during the welding operation, and the workability is poor.

FIG. 8 shows an embodiment in which the steel column 2 is a square steel pipe having a diaphragm 2a, and the flange 3 of the steel beam 1 is welded to the diaphragm 2a. In this case, the joint side end of the web 4 of the steel beam 1 is
Is processed so as to extend to the side longer than the end of the steel column 2 and to contact the side surface of the steel column 2. Since the shape of the groove and the method of welding are the same as in the previous embodiment, the same reference numerals are given and the description is omitted.

[0013]

As described above, in the present invention, the slope 6 inclined at a predetermined angle with respect to the welding-side end face of the flange 3 is provided.
And a groove 5 having a bottom surface 7 parallel to the flange 3 is formed at the welded end of the flange 3 of the steel beam 1 made of H-shaped steel, and at the same time, the flange 3 is partially formed on the bottom side of the groove 5. A step of forming a joining tongue piece 8 by leaving it, a step of forming a notch 9 by cutting off a portion of the web 4 of the steel beam 1 near a joint with a flange 3 at a welding side end, and a step of forming a notch 9.
Arranging the steel column 2 and the steel beam 1 so that the tip of the joining tongue piece 8 abuts on the side surface of the steel beam 2, and placing the inside of the flange 3 at the welded end of the steel beam 1 on the side surface of the steel column 2. Step of welding 10 and welding metal 11 on joining tongue piece 8 of steel beam 1 sequentially
And the step of filling the inside of the groove 5 with the weld metal 11 is adopted, so that the method of welding the steel column and the steel beam for construction including the step of filling the inside of the groove 5 with the welding metal 11 can be employed, so that the use of the backing metal can be omitted, and The work of assembling and welding the backing plate is omitted, so that the amount of welding material and material power can be reduced. This is direct full penetration welding between the steel column and the steel beam, the penetration portion is integrated, and there is no fear of welding defects in the backing metal, which is a separate member, and a high-strength joint can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a welding-side end portion of a steel beam sequentially showing a welding process according to the present invention.

FIG. 2 is a front view of a welding-side end of a steel beam sequentially showing a welding process according to the present invention.

FIG. 3 is an enlarged front view of a part of a joint state between a steel beam and a steel column, sequentially showing a welding process according to the present invention.

FIG. 4 is an enlarged front view of a part of a joint state between a steel beam and a steel column, sequentially showing a welding process according to the present invention.

FIG. 5 is an enlarged front view of a part of a joint state between a steel beam and a steel column, sequentially showing a welding process according to the present invention.

FIG. 6 is a perspective view of a welded end of a steel beam having a groove formed therein.

FIG. 7 is an explanatory diagram showing a penetration state of a welded portion.

FIG. 8 is an enlarged front view of a part of a joint state of a steel beam and a steel column showing another embodiment of the present invention.

FIG. 9 is an enlarged view near a groove showing an example of a conventional method of welding a steel column and a steel beam.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 steel beam 2 steel column 3 flange 4 web 5 groove 6 slope 7 bottom surface 8 joining tongue piece 9 notch 10 welded part 11 welded part (weld metal)

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E04B 1/58 508 E04B 1/58 508S 508F // B23K 101: 28 B23K 101: 28 F-term (Reference) 2E125 AA04 AA14 AB01 AB16 AC15 AC16 AG34 AG56 AG57 CA90 4E081 AA12 AA14 BA02 BA19 BA32 BA34 BA40 BA47 BB13 BB15 CA01 CA07 DA01 DA05 DA11 DA27 DA35 FA14 YB02 YB03 YB04 YB05 YB08 YX02 YX07 YX08 YY14

Claims (5)

[Claims] In a steel beam made of an H-shaped steel material, a groove at a predetermined angle is formed at a welding-side end of a flange, a welding-side end of the flange is abutted against a side surface of a steel column, and the groove is formed of a welding metal. A method of completely penetrating and welding a steel beam to a side surface of a steel column by burying the steel beam. (1) A groove having a slope inclined at a predetermined angle with respect to a welding-side end surface of the flange and a bottom surface parallel to the flange. Forming a welding tongue piece at the welding side end of the flange of the steel beam beam, at the same time, leaving a part of the flange on the bottom side of the groove,
(2) a step of cutting off a portion of the web of the steel beam near the joint at the welding side end with the flange to form a notch; and (3) attaching the tip of the joining tongue piece to a side surface of the steel column. Arranging the steel column and the steel beam so as to be in contact with each other; (4) welding the inside of the flange at the welded end of the steel beam to the side surface of the steel column; Welding a weld metal on the joining tongue of the steel beam sequentially and filling the inside of the groove with the weld metal, thereby completely penetrating and welding to the welded portion inside the flange. Welding method for building steel columns and steel beams. 2. The joint tongue of the steel beam has a thickness of 2 mm.
The method according to claim 1, wherein the width is set to 3 mm and the width is set to 3 mm to 5 mm. 3. The steel column and the steel beam for building according to claim 1, wherein the steel column is an H-shaped steel material or a square steel tube, and the steel beam is welded to a side surface of the steel column. Welding method. 4. The steel column according to claim 1, wherein the steel column is a square steel tube having diaphragms arranged at predetermined intervals in an axial direction, and the steel beam is welded to a side surface of the diaphragm of the steel column. The welding method of the steel column and the steel beam for construction described. 5. A groove formed at a welding-side end of the flange by a slope inclined at a predetermined angle with respect to the welding-side end surface and a bottom surface parallel to the flange, and the flange is partially left at the bottom of the groove. The tip of the joining tongue of a steel beam made of an H-shaped steel material having a joining tongue formed by abutting against the side surface of the steel column, and the inside of the flange at the welded end of the steel beam is in contact with the side surface of the steel column. A joint structure between an architectural steel column and a steel beam, wherein the joint is weld-welded, the inside of the groove is filled with a weld metal, and the weld is completely weld-welded to the weld inside the flange.