JP2002188208A - Steel-framed beam-column connecting section structure of box-shaped section column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a connecting section having high strength and rigidity without using a conventional diaphragm in the beam-column connecting section, and to obtain the beam-column connecting section having excellent productivity by omitting the complete penetration welding of the diaphragm and a column and electroslag welding. SOLUTION: Tabular horizontal stiffening members 3 are installed horizontally by fillet weld or the like while being brought into contact with beam flanges 2a on the external side faces of the four sides of a steel-framed column 1 in joining sections, where steel-framed beams 2 composed of H-steel are mounted on the side faces of the steel-framed column 1 composed of a square-shaped steel pipe column and a welded built-up box-shaped sectional column, divided stiffening members 10 and 11 are combined at an interval in the horizontal stiffening members 3, the horizontal stiffening members 3 are connected by connecting materials 20 and unified, the strength and rigidity of beam-column connecting sections are ensured by a column sectional deformation constraint effect by a ring unified with the column sectional deformation constraint effect by the horizontal stiffening members 3, and the conventional diaphragm and its complete penetration welding and electroslag welding are omitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel beam-column joint structure applied to a box-shaped column such as a rectangular steel tube column or a welded box column.

[0002]

2. Description of the Related Art Box-shaped section (closed section) of square steel pipe
When a steel beam having an H-shaped cross section is joined to the side surface of a steel column, a beam-to-column joint structure such as a through-diaphragm type or an inner diaphragm type is generally adopted.

[0003] In the through-diaphragm type, FIG.
As shown in (a), a middle part of a steel column 1 made of a rectangular steel pipe is cut at two upper and lower portions to form a joint 1a, and through the upper and lower surfaces of the joint 1a, a steel column is horizontally penetrated. The diaphragms 50, 50 are attached by welding 51, the ends of the steel column 1 are attached to the through diaphragms 50, 50 by welding 52, respectively, and a pair of upper and lower through diaphragms 5 are attached.
The end faces of the upper and lower flanges 2a, 2a of the steel beam are respectively butted to the end faces 0, 50 by welding 53.

In the case of the inner diaphragm type, FIG.
As shown in (b), when the steel column 1 is a square steel pipe, the central portion of the joint of the steel column 1 is cut horizontally, and the inner diaphragm is inserted into the upper and lower steel column 1, 1 from the cut portion. 6
0 and 60 are arranged horizontally and fixed by welding 61,
After that, the upper and lower steel columns 1, 1 are fixed to each other by welding 62,
The steel beam 2 is attached to the side surface of the steel column 1 by welding 63 so that the pair of upper and lower inner diaphragms 60, 60 and the upper and lower flanges 2a, 2a of the steel beam 2 match. In the case of a welded box-shaped section column (built box), the inner diaphragm 60 is attached to the side plate of the steel column 1 by electroslag welding.

[0005]

However, in the above-mentioned conventional joint structure, a diaphragm is used, and since full penetration welding or electroslag welding is used for welding the diaphragm and the steel column, a large number of joints are used. There is a problem that a beveling process and a backing material need to be attached at a welding position, and that welding work and welding management take time, which takes much time and effort.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a joint having high proof stress and rigidity without using a conventional diaphragm at the joint of a column and a beam. Another object of the present invention is to provide a steel beam-column joint structure having a box-shaped cross-section which can obtain a beam-column joint having excellent manufacturability by omitting complete penetration welding and electroslag welding of the diaphragm and the column.

[0007]

According to a first aspect of the present invention, there is provided a joint wherein an end portion of a steel beam is joined to an outer surface of a steel column having a box-shaped section (such as a square steel tube column or a welded box-shaped section column). Horizontal column stiffeners (steel plate, flat bar, angle steel, channel steel, cut T-section steel, etc.) are provided on the outer sides of the four sides of the steel column in the section. Beam joint structure. The first aspect of the present invention is applied to a middle pillar having steel beams attached to four sides of a steel column, a side pillar having steel beams attached to three sides of a steel column, and a corner pillar having steel beams attached to two sides of a steel column.

According to a second aspect of the present invention, the four sides of the steel column at the joint where the end of the steel beam is joined to the outer surface of a steel column having a box-shaped cross section (such as a square steel tubular column or a welded box-shaped column). Of these, horizontal stiffeners (steel plate, flat bar, angle steel, channel steel, cut T-section steel, etc.) are provided on the outer surface of the side where the steel beam is attached, and the outer surface of the side where the steel beam is not attached is vertical. This is a steel beam-column joint structure of a box-shaped section column, which is provided with a stiffener (a steel plate, a flat bar, an angle steel, a channel steel, a cut T-section steel, etc.). This claim 2
Applicable when the distance from the outer surface of the steel column to the wall is limited in side columns and corner columns.

According to a third aspect of the present invention, in the steel beam-column joint structure according to the first or second aspect, the horizontal stiffener comprises a plurality of divided stiffeners divided in the circumferential direction of the steel column. The divided stiffeners are arranged so as to surround the steel column in plan view and to form a gap between adjacent divided stiffeners, and each of the divided stiffeners is welded to the steel column ( (Fillet welding, partial penetration welding, etc.), and the adjacent divided stiffeners are joined together (steel plate, flat bar, etc.)
And a steel beam-column joint structure having a box-shaped cross-section column.

According to a fourth aspect of the present invention, in the steel beam-column joint structure according to the first or second aspect, the horizontal stiffener comprises a plurality of divided stiffeners divided in the circumferential direction of the steel column. These divided stiffeners are arranged so as to surround the steel column in plan view, and each divided stiffener is joined to the steel column by welding (fillet welding, partial penetration welding, etc.), and the adjacent divided stiffeners are joined. This is a steel beam-column joint structure having a box-shaped cross section, wherein rigid members are joined by welding (such as full penetration welding or partial penetration welding).

The horizontal stiffeners according to claims 3 and 4 are, for example, a combination of four long and short divided stiffeners which are rectangular in plan view (see FIGS. 1 and 3) or plan view. Combine rectangular stiffeners of the same shape into a square tom (see Fig. 2), or combine four trapezoidal stiffeners in plan view (see Fig. 5), or L-shaped in plan view Combine two, and connect with the connecting material,
Alternatively, they are joined by welding to form a square ring-shaped horizontal stiffener in plan view. When a vertical stiffener is used, the horizontal stiffener having the above configuration is formed into a U-shape or an L-shape in plan view, and the vertical stiffener is joined by welding instead of one or two sides of the horizontal stiffener. (See FIGS. 6 to 9).

According to a fifth aspect of the present invention, in the steel beam-column joint structure according to the first or second aspect, the horizontal stiffener comprises an integral stiffener having an insertion hole for the steel column. The inner peripheral portion of the stiffener is joined to the steel column by welding (fillet welding, partial penetration welding, or the like), which is a steel column beam joint structure of a box-shaped cross-section column. The horizontal stiffener according to claim 5 is, for example, a horizontal stiffener having a square ring shape in plan view (see FIG. 4). When a vertical stiffener is used, one or two vertical stiffeners are joined by welding to an integral horizontal stiffener having a U-shape or an L-shape in plan view.

[0013] Claim 6 of the present invention is Claims 1, 2, 3,
The steel beam-column joint structure according to 4 or 5, wherein a vertical rib is provided on the surface of the horizontal stiffener. The vertical rib protrudes from the opposite surface of the beam flange.

[0014] Claim 7 of the present invention is Claims 1, 2, 3,
In the steel beam-column joint structure according to 4, 5, or 6,
Steel beams consist of members with upper and lower flanges and webs,
A horizontal stiffener is provided adjacently above the upper and lower beam flanges or below the upper and lower beam flanges. This is a steel beam-column joint structure with a box-shaped section.

Claim 8 of the present invention is Claims 1, 2, 3,
In the steel beam-column joint structure according to 4, 5, or 6,
Steel beams consist of members with upper and lower flanges and webs,
A horizontal stiffener is provided adjacent to the upper and lower beam flanges of the upper and lower beam flanges or the lower and lower beam flanges of the upper beam flange. This is a steel beam-column joint structure with a box-shaped section.

A ninth aspect of the present invention is the first aspect of the present invention.
In the steel beam-column joint structure according to 4, 5, or 6,
Steel beams consist of members with upper and lower flanges and webs,
A steel beam-column joint structure of a box-shaped section column, characterized in that a horizontal stiffener is provided close to the upper and lower sides of an upper beam flange and a lower beam flange.

In the above-described configuration, by attaching a horizontal stiffener or a vertical stiffener to the four sides of a steel column having a box-shaped cross section, the column-shaped deformation of the box-shaped column (deformation of the local out-of-plane deformation of the column plate) can be reduced. ) Can be restrained, and even if the conventional diaphragm is omitted, the strength and rigidity of the beam-column joint can be ensured. Furthermore, by integrating the four horizontal stiffeners or vertical stiffeners by connecting or welding, or by integrating them, the column cross-sectional deformation of the integrated horizontal stiffener ring that surrounds the entire circumference of the steel column The restraining effect is added, and the strength and rigidity of the beam-column joint are further improved. Further, by providing the vertical ribs on the horizontal stiffener, the stiffening effect is improved.

The horizontal stiffener or the vertical stiffener can be attached to the side of the steel column by relatively simple fillet welding or partial penetration welding. Since the electroslag welding (the welded box-shaped section column) can be omitted, a beam-to-column joint excellent in manufacturability can be obtained.

The horizontal stiffener is composed of a plurality of divided stiffeners, and a gap is formed between the divided stiffeners and connected by a connecting member.
Alternatively, by combining the divided stiffeners in a quadrangular bar shape and joining them by welding, the tolerance of the outer shape of the steel column can be easily absorbed.

By using the vertical stiffener, the strength and rigidity of the beam-column joint can be improved even when the distance from the outer surface of the steel column to the wall is limited in the side columns and corner columns. it can.

By arranging the horizontal stiffeners on the upper and lower sides of the beam flange, the effect of restraining column section deformation is increased, and both the proof stress and rigidity are improved. In addition, by providing the horizontal stiffener as close to the beam flange as possible, the effect of restraining column section deformation is increased, and mechanical performance can be improved.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. 1 to 5 show an example in which the beam-column joint structure of the present invention is applied to a middle pillar. 6 to 8 show examples in which the beam-column joint structure of the present invention is applied to side columns. FIG. 9 shows an example in which the beam-column joint structure of the present invention is applied to a corner post.

In the middle column shown in FIGS. 1 to 5, steel beams 2 made of H-shaped steel are attached to outer surfaces of four sides at a joint (panel zone) of a steel column 1 made of a square steel pipe. A plate-shaped horizontal stiffener 3 is attached to the outer surface of the four sides of the steel column 1 at such a joint in parallel with the beam flange 2a. The end of the steel beam 2 is joined to the side surface of the steel column 1 by welding in the same manner as before, and the horizontal stiffener 3 is not attached to the steel beam 2 but is Partial penetration welding by meat welding or grooved groove 4
Fix directly with.

The horizontal stiffener 3 has a square ring shape that completely covers the periphery of the steel column 1 in plan view. In the embodiment of FIG. 1, two long divided stiffeners 10 and two long stiffeners 10 are provided. It is divided into four short divided stiffeners 11. The long divided stiffener 10 has an outer dimension of the steel column 1 of d and a plate width of the short divided stiffener 11 of b.
Is a rectangle of length a = d + 2b and width b,
The central part is fixed to the opposite two sides of the steel column 1 by welding 4, respectively. The short divided stiffener 11 is a rectangle having a length c <d, and is fixed to each of the other two opposite sides of the steel column 1 by welding, and a gap g is formed between the short divided stiffener 10 and the long divided stiffener 10. To be formed.

Since the gap g is provided between the long divided stiffener 10 and the short divided stiffener 11, the tolerance of the outer dimensions of the steel column 1 can be absorbed. The ends of the long divided stiffener 10 and the short divided stiffener 11 sandwiching the gap g are connected to each other by a connecting member 20 such as a steel plate or a flat bar. Of the horizontal stiffener 3. The divided stiffeners 10 and 11 and the joining material 20 are fixed with fillet welds 5.

In the embodiment of FIG. 2, the horizontal stiffener 3 is divided into four divided stiffeners 12 of the same size. This divided stiffener 12 is a rectangle having a length of ab and a width of b, and is combined in a quadrangular tom shape, and the ends of each divided stiffener 12 are completely formed by a Le-shaped or K-shaped groove. Joining is performed by penetration welding or partial penetration welding 21 to form a rectangular ring-shaped integral horizontal stiffener 3 having vertical and horizontal external dimensions a. Also in this case, the steel column 1
It is possible to absorb the tolerance of the external dimensions.

In the embodiment of FIG. 3, the horizontal stiffener 3 is
Two long divided stiffeners 10 and two short divided stiffeners 1
Divide into four into three. The long divided stiffener 10 is a rectangle having a length a and a width b as in FIG. 1, and the short divided stiffener 13 is a rectangle having a length d and a width b, The ends of the long divided stiffener 10 and the short divided stiffener 11 are joined to each other by full penetration welding or partial penetration welding 21 using a R-shaped or K-shaped groove. A rectangular ring-shaped integrated horizontal stiffener 3 is used.

In the embodiment shown in FIG. 4, the horizontal stiffener 3 is an integral square ring 14 having vertical and horizontal external dimensions a.
This square ring body 14 has a square insertion hole 14a with an inner diameter of d at the center, is inserted into the steel column 1, and is joined to the steel column 1 by fillet welding or partial penetration welding 4 using a groove. I do.

1 to 4, the divided stiffeners 10, 1
Vertical ribs 22 are provided on the 1, 12, 13, and the square ring body 14 to improve the stiffening effect of the stiffener. This vertical rib 22
Are preferably arranged on the axis of the steel beam 2 in plan view. Also, it protrudes from the surface opposite to the beam flange 2a. The vertical rib 22 and the steel column 1 are fixed by fillet welding. The vertical ribs 22 may be omitted when it is determined that the joint performance is sufficient.

Although the divided stiffeners are rectangular in FIGS. 1 to 3, they may be divided obliquely at the corners as shown in FIG. 5 to form trapezoidal divided stiffeners 15. Again,
A gap g is formed between the divided stiffeners 15, 15, and the adjacent divided stiffeners 15, 15 are connected to each other by a connecting member 20, or the adjacent divided stiffeners 15, 15 are shaped like a square or K
Full penetration welding or partial penetration welding 21
Join with. It should be noted that the present invention is not limited to the above dividing method, and other dividing methods may be used.

The arrangement of the horizontal stiffeners 3 above and below is as follows. That is, as shown in FIGS. 1 to 4B, the outer side of the pair of upper and lower beam flanges 2a, 2a,
Upper and lower beam flanges 2 of the upper beam flange 2a
It is arranged below and in parallel with the beam flange 2a. The fillet welding with the steel column 1 or the partial penetration welding 4 with a groove is performed from one side without the steel beam 2. In addition, since the full penetration welding or the partial penetration welding 21 by the Le-shaped or K-shaped groove in FIGS. 2 and 3 is separated from the steel beam 2 in plan view, it can be performed from both upper and lower sides.

Although not shown, the inside of the pair of upper and lower beam flanges 2a, 2a, that is, the upper beam flange 2a
Above the lower and lower beam flanges 2a. Alternatively, the inside and outside of the pair of upper and lower beam flanges 2a, 2a, ie, the lower side of the upper beam flange 2a and the lower side of the lower beam flange 2a, or the outer and inner sides of the pair of upper and lower beam flanges 2a, 2a, That is, it may be disposed above the upper beam flange 2a and above the lower beam flange 2a. Furthermore, these may be combined and arranged on the upper and lower sides of the upper beam flange 2a and the lower beam flange 2a.

When the horizontal stiffener 3 is disposed inside the pair of upper and lower beam flanges 2a, 2a, the beam web 2
The horizontal stiffener 3 can be inserted and arranged by notching b or the like.

The horizontal stiffener 3 having the above structure can be applied not only to the middle pillar but also to the side pillars and corner pillars. When the distance is limited, a plate-shaped vertical stiffener 30 is used as shown in FIGS.

In the side columns shown in FIGS. 6 to 8, a plate-shaped vertical stiffener 30 is attached to the outer surface of one side of the steel column 1 to which the steel beam 2 is not attached. The position of the vertical stiffener 30 in the vertical direction is matched with the mounting position of the horizontal stiffener 3, and the vertical stiffener 30 and the end of the horizontal stiffener 3 are completely formed by a Le-shaped or K-shaped groove. Joining is performed by penetration welding, partial penetration welding, or fillet welding 31, and the vertical stiffener 30 and the side surface of the steel column 1 are joined by fillet welding 32. The horizontal stiffener 3
Is different from FIG. 1 to FIG. 4 only in that the shape in plan view is U-shaped.

Also in the corner post shown in FIG. 9, the vertical stiffeners 30 are attached to the outer surfaces of the two sides of the steel column 1 to which the steel beam 2 is not attached in the same manner as the side columns described above. Again,
The configuration of the horizontal stiffener 3 is the same as that of FIGS. 1 to 4, except that the shape in plan view is substantially L-shaped.

In the case of the horizontal stiffener 3 and the vertical stiffener 30 having the above-described structures, as shown in the plan views of FIGS. Not be
A decrease in toughness of the corner can be prevented.

Next, FIG. 13 shows the results of a local proof tensile test of the beam-column joint using the test pieces shown in FIGS. 10, 11 and 12. The test specimen is 350 mm long and 19 mm thick.
m is formed by welding and joining plate-shaped steel beams on both sides of a square steel pipe (SN steel) having a length of m.
It is.

FIG. 11 shows a test piece using a partial stiffener 3 'at the corner proposed in Japanese Patent Application No. 2000-51211, and FIG. 11 (a) shows a stiffener 3' having an upper portion. Only specimen C
-1 and FIG. 11 (b) shows a specimen C- in which the stiffener 3 'has two upper and lower sheets.
2 (unidirectional ramen type), Fig. 11 (c) shows stiffener 3 '
Is a specimen C-3 (two-way rigid frame type) having two upper and lower steel beam equivalent materials 2 '. The stiffener 3 'is a plate (SM steel) having a plate thickness of 16 mm.

FIG. 12 shows a test body using only the upper part of the horizontal stiffener 3 surrounding the entire circumference of the steel column of the present invention.
A gap g is provided between the divided stiffeners 10 and 11 of
It is a type to connect with. Also in this case, the horizontal stiffener 3 is a plate (SM steel) having a plate thickness of 16 mm.

As shown in FIG. 13 (a), a tensile force P was applied to both ends of the steel beam to measure the amount of deformation δ between both sides of the column member, as shown in FIG. 13 (a). Indicating load P
The relationship of the deformation amount δ was obtained, and the maximum proof stress shown in FIG. 13 (c) was obtained.

The following is clear from FIGS. 13B and 13C. That is, a partial stiffener 3 ′ at the corner portion
In the case of the type C using the stiffener, the proof strength and rigidity are improved as compared with the standard type A due to the column section deformation restraining effect of the stiffener 3 ′. By arranging the stiffeners 3 'up and down, the effect of restraining column section deformation is increased, and the proof strength and rigidity are improved. If the steel beam equivalent material 2 'is provided, since the column section deformation is restrained, both the proof stress and rigidity are improved. In the case of the type D provided with the horizontal stiffeners 3 surrounding the entire circumference of the steel column according to the present invention, the column cross-section deformation restraining effect by the four horizontal stiffeners and the integrated horizontal stiffening surrounding the entire circumference of the steel column are provided. The rigidity and proof stress are further improved as compared with Type C due to the column section deformation restraining effect of the material ring.

When the vertical stiffeners 30 are provided on the side columns and the corner columns, the rigidity and the proof stress are further improved as compared with the type C due to the same column section deformation restraining effect as described above. The shorter the distance between the horizontal stiffener 3 and the beam flange 2a attached to the box-shaped section column, the greater the effect of restraining the column section deformation (about 10 mm (about the thickness of the backing material)).

The horizontal stiffener 3 and the vertical stiffener 30
Is a plate-shaped member, but is not limited to this, and may be a flat bar, an angle steel, a channel steel, a cut T-shaped steel, or the like. Further, although the steel column is exemplified by a square steel pipe, the present invention is not limited to this, and may be a welded-assembly box-shaped column.

[0045]

Since the present invention has the above-described structure, the following effects can be obtained. (1) By attaching a horizontal stiffener or a vertical stiffener to the four sides of a steel column with a box-shaped cross section, the column-shaped deformation of the box-shaped column can be restrained, and even if the conventional diaphragm is omitted, The strength and rigidity of the beam-column joints can be ensured, and the horizontal stiffeners or vertical stiffeners on the four sides can be integrated by joining or welding, or can be constructed as an integral unit, so that The column section deformation restraining effect of the integrated horizontal stiffener ring surrounding the circumference is added, the strength and rigidity of the beam-column joint are further improved, and a beam-column joint excellent in mechanical performance can be easily obtained. .

(2) By providing a vertical rib on the horizontal stiffener, the stiffening effect is improved.

(3) Since the horizontal stiffener or the vertical stiffener can be attached to the side surface of the steel column by relatively simple fillet welding or partial penetration welding, it is possible to completely dissolve the conventional diaphragm and the steel column. Welding or electroslag welding (box with welded box section) can be omitted,
A column-beam joint excellent in manufacturability is obtained, and the manufacturing cost can be reduced.

(4) The horizontal stiffener is composed of a plurality of divided stiffeners, and a gap is formed between the divided stiffeners and connected by a connecting member, or the divided stiffeners are formed in a square toe shape. By combining and joining by welding, the tolerance of the outer shape of the steel column can be easily absorbed, and the manufacturability is further improved.

(5) By using the vertical stiffener, the strength and rigidity of the beam-column joint can be improved even when the distance from the outer surface of the steel column to the wall is limited in the side columns and corner columns. Can be planned.

(6) By arranging the horizontal stiffeners on the upper and lower sides of the beam flange, the effect of restraining column section deformation is increased.
Strength and rigidity can be further improved.

(7) By providing the horizontal stiffener as close as possible to the beam flange, the effect of restraining column section deformation is increased, and mechanical performance can be improved.

[Brief description of the drawings]

FIG. 1 is an example (joining material type) in which a beam-column joint structure of the present invention is applied to a middle pillar, (a) is a plan view, and (b) is a front view.

FIGS. 2A and 2B are examples (welding type I) in which the beam-column joint structure of the present invention is applied to a middle pillar, wherein FIG. 2A is a plan view and FIG.

FIGS. 3A and 3B are examples (welding type II) in which the beam-column joint structure of the present invention is applied to a middle pillar, wherein FIG. 3A is a plan view and FIG.

FIGS. 4A and 4B are examples (integrated type) in which the beam-column joint structure of the present invention is applied to a middle pillar, wherein FIG. 4A is a plan view and FIG.

FIG. 5 is a plan view showing a modification in which the shape of the divided stiffeners in FIG. 1 is different.

FIG. 6 is an example (joining material type) in which the beam-column joint structure of the present invention is applied to a side pillar, (a) is a plan view, and (b) is a front view.

FIGS. 7A and 7B are examples (welding type I) in which the beam-column joint structure of the present invention is applied to side columns, wherein FIG. 7A is a plan view and FIG.

FIG. 8 is an example (welding type II) in which the beam-column joint structure of the present invention is applied to a side column, (a) is a plan view, and (b) is a front view.

FIG. 9 is an example (joining material type) in which the beam-column joint structure of the present invention is applied to a corner post, (a) is a plan view, and (b) is a front view.

FIG. 10 is a plan view and a side view showing a standard specimen A without a stiffener in a local proof tensile test of a beam-column joint.

11A and 11B are a plan view and a side view showing a test body in which a stiffener for a local strength tensile test of a beam-column joint is provided at a corner portion, and FIG.
Is a specimen C-1 having only the upper stiffener, (b) is a specimen C-2 having two upper and lower stiffeners, and (c) is a specimen having two upper and lower stiffeners and has a steel beam equivalent material. The test body C-3 is shown.

12A and 12B are a plan view and a side view showing a test body according to the present invention in which stiffeners for a local proof tensile test of a beam-column joint are provided on four sides.

13 (a) is a plan view showing a local proof tensile test of a beam-column joint, (b) is a graph showing the relationship between the load and the amount of deformation in each specimen, and (c) is the maximum proof stress in each specimen FIG.

14A and 14B are a plan view, a side view, and a partially enlarged sectional view showing a conventional beam-column joint structure, wherein FIG. 14A shows a through-diaphragm type, and FIG. 14B shows an inner-diaphragm type.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Steel column of box-shaped cross section 2 ... Steel beam of H-shaped cross section 2a ... Beam flange 2b ... Beam web 3 ... Horizontal stiffener 4 ... Fillet welding or partial penetration welding by a reed groove 5 ... Fillet welding DESCRIPTION OF SYMBOLS 10 ... Long split stiffener 11 ... Short split stiffener 12 ... Split stiffener 13 ... Short split stiffener 14 ... Square ring body 14a ... Insertion hole 15 ... Trapezoid split stiffener 20 ... Connecting material 21 ... Complete penetration welding or partial penetration welding using a re-shaped or K-shaped groove 22 ... Vertical rib 30 ... Vertical stiffening material 31 ... Complete penetration welding or partial penetration-welding using a re-shaped or K-shaped groove Or fillet welding 32 ... fillet welding

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masahiko Uchiyama 6-2-10 Ginza, Chuo-ku, Tokyo Inside the Tomoe Corporation (72) Inventor Ryoichi Tanuma 6-2-10 Ginza, Chuo-ku, Tokyo Within Tomoe Corporation (72) Inventor Isao Shimoda 6-2-10 Ginza, Chuo-ku, Tokyo F-term at Tomoe Corporation (reference) 2E125 AA03 AA13 AB01 AB16 AC15 AC16 AG03 AG04 AG32 AG41 AG57 BB02 BB09 BB12 BB29 BB35 BB37 BC09 BD01 BE02 BE05 BF05 CA90 EA33

Claims (9)

[Claims] 1. A box characterized in that horizontal stiffeners are provided on outer surfaces of four sides of a steel column at a joint where an end of a steel beam is joined to an outer surface of a steel column having a box-shaped cross section. Steel beam-to-column joint structure with column shaped section. 2. A horizontal stiffener is provided on an outer surface of a side to which the steel beam is attached among four sides of the steel column at a joint where an end of the steel beam is joined to an outer surface of the box-shaped steel column. A vertical column stiffener is provided on an outer surface of a side where a steel beam is not attached, and a steel beam-column joint structure of a box-shaped section column. 3. The steel beam-column joint structure according to claim 1, wherein the horizontal stiffener comprises a plurality of divided stiffeners divided in a circumferential direction of the steel column, and the divided stiffeners are provided. Are arranged so as to surround the steel column in plan view, and to form a gap between adjacent divided stiffeners, and each divided stiffener is joined to the steel column by welding, and the adjacent divided A steel beam-column joint structure having a box-shaped cross section, wherein the stiffeners are connected to each other via a connecting member. 4. The steel beam-column joint structure according to claim 1, wherein the horizontal stiffener comprises a plurality of divided stiffeners divided in a circumferential direction of the steel column, and these divided stiffeners are provided. Is arranged so as to surround the steel column in plan view, each divided stiffener is joined to the steel column by welding, and adjacent divided stiffeners are joined by welding. Steel beam-column joint structure of section column. 5. The steel beam-column joint structure according to claim 1 or 2, wherein the horizontal stiffener is an integral stiffener having an insertion hole for a steel column. A steel beam-column joint structure having a box-shaped cross section, wherein a peripheral portion is welded to the steel column. 6. A steel beam-column joint structure according to claim 1, wherein the surface of the horizontal stiffener comprises:
A steel beam-column joint structure having a box-shaped cross section, wherein a vertical rib is provided. 7. The steel beam-column joint structure according to claim 1, wherein the steel beam comprises a member having upper and lower flanges and a web, and upper and lower portions of the upper beam flange. A horizontal column stiffener is provided adjacent to a lower side of a beam flange or above a lower side and an upper side of a lower beam flange. Joint structure. 8. The steel beam-column joint structure according to claim 1, wherein the steel beam comprises a member having upper and lower flanges and a web, and upper and lower portions of the upper beam flange. A horizontal column stiffener is provided adjacent to a beam flange above or below an upper beam flange and below a lower beam flange. Joint structure. 9. The steel beam-column joint structure according to claim 1, wherein the steel beam comprises a member having upper and lower flanges and a web, an upper beam flange and a lower beam. A steel beam-column joint structure of a box-shaped column, wherein horizontal stiffeners are provided close to each other on the upper and lower sides of the flange.