JP7202983B2 - Joint structure of square steel pipe column - Google Patents

Description

One embodiment of the present invention relates to a joint structure for square steel pipe columns used in buildings.

Welding and bolting are used as methods for joining steel frame members at construction sites. Welded joints can ensure sufficient strength, but on the other hand, they require a high degree of skill and work time, and the quality and performance are also affected by the skill of the workers. On the other hand, bolt connection has the advantage that the construction period can be shortened and quality control is easy. For bolt joining, for example, a method of joining a steel pipe column and an H-shaped steel and a method of joining steel pipe columns together are disclosed (see Patent Documents 1 and 2).

Japanese Patent Application Laid-Open No. 5-179702 (Patent No. 3122209) Japanese Patent Application Laid-Open No. 2004-293196 (Patent No. 4038449)

When joining steel members with bolts, members having an open cross-sectional shape such as H-shaped steel can be easily joined with bolts. However, when a tubular member such as a rectangular steel pipe column is bolted, there is a problem that it cannot be performed easily. Furthermore, it is required that the bolted portion does not have lower strength than other portions of the square steel pipe column.

One of the objects of the present invention is to provide a joint structure for square steel pipe columns for solving such problems.

A joint structure for a square steel pipe column according to an embodiment of the present invention includes a first flange provided at one end of a first square steel pipe column, and a corner portion of the first square steel pipe column adjacent to the first flange. A first gap provided in the second flange provided at one end of the second square steel pipe column and a corner of the second square steel pipe column adjacent to the second flange 2 gaps, a first auxiliary plate joined to the surface of the first square steel pipe column and adjacent to the first flange, and a second square steel pipe column joined to the surface and adjacent to the second flange and a first splint plate contacting one side of each of the first flange and the second flange. The plate thickness of the first flange is thicker than the thickness of the first square steel pipe column, and the plate thickness of the second flange is thicker than the thickness of the second square steel pipe column. In a state in which one end of the first square steel pipe column and one end of the second square steel pipe column are butted against each other, an opening is formed by the first gap and the second gap, and the first square steel pipe column and the second square steel pipe column are bolted using a first flange, a second flange and a first splint.

A joint structure for a square steel pipe column according to an embodiment of the present invention includes a first flange provided at one end of a first square steel pipe column, and a corner portion of the first square steel pipe column adjacent to the first flange. A first gap provided in the second flange provided at one end of the second square steel pipe column and a corner of the second square steel pipe column adjacent to the second flange 2 gaps, a first auxiliary plate joined to the first flange and the first square steel pipe column, a second auxiliary plate joined to the second flange and the second square steel pipe column, a first splint sized to overlap the first flange and the second flange. In a state in which one end of the first square steel pipe column and one end of the second square steel pipe column are butted against each other, an opening is formed by the first gap and the second gap, and the first square steel pipe column and the second rectangular steel pipe column are bolted using a first flange, a second flange, a first auxiliary plate, a second auxiliary plate, and a first auxiliary plate.

According to the joint structure for square steel pipes according to an embodiment of the present invention, it becomes easy to join square steel pipe columns with bolts. Furthermore, according to the joint structure of the square steel pipe column according to the embodiment of the present invention, the strength of the bolted portion can be equal to or higher than that of the other portions of the square steel pipe column. .

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the joint structure of the square steel pipe column which concerns on one Embodiment of this invention is shown, (A) shows a development view, (B) shows the bolt joint part in the joint structure of two square steel pipe columns. The front view of the bolt joint part in the joint structure of the square steel pipe column which concerns on one Embodiment of this invention is shown. 3 shows a cross-sectional structure of a bolt joint in the joint structure of the square steel pipe column shown in FIG. 2 ; The front view of the bolt joint part in the joint structure of the square steel pipe column which concerns on one Embodiment of this invention is shown. FIG. 5 shows a cross-sectional structure of a bolt joint in the joint structure of the square steel pipe column shown in FIG. 4 ; The front view of the bolt joint part in the joint structure of the square steel pipe column which concerns on one Embodiment of this invention is shown. BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the joint structure of the square steel pipe column which concerns on one Embodiment of this invention is shown, (A) shows a development view, (B) shows the bolt joint part in the joint structure of two square steel pipe columns. The front view of the bolt joint part in the joint structure of the square steel pipe column which concerns on one Embodiment of this invention is shown. FIG. 9 shows a cross-sectional structure of a bolt joint in the joint structure of square steel pipe columns shown in FIG. 8 ; BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the joint structure of the square steel pipe column which concerns on one Embodiment of this invention is shown, (A) shows a development view, (B) shows the bolt joint part in the joint structure of two square steel pipe columns. The front view of the bolt joint part in the joint structure of the square steel pipe column which concerns on one Embodiment of this invention is shown. FIG. 12 shows a cross-sectional structure of a bolt joint in the joint structure of square steel pipe columns shown in FIG. 11 ; The front view of the bolt joint part in the joint structure of the square steel pipe column which concerns on one Embodiment of this invention is shown. FIG. 14 shows a cross-sectional structure of a bolt joint in the joint structure of square steel pipe columns shown in FIG. 13 ; FIG. The front view of the bolt joint part in the joint structure of the square steel pipe column which concerns on one Embodiment of this invention is shown. BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the joint structure of the square steel pipe column which concerns on one Embodiment of this invention is shown, (A) shows a development view, (B) shows the bolt joint part in the joint structure of two square steel pipe columns. The front view of the bolt joint part in the joint structure of the square steel pipe column which concerns on one Embodiment of this invention is shown. FIG. 18 shows a cross-sectional structure of a bolt joint in the joint structure of square steel pipe columns shown in FIG. 17 ;

Hereinafter, the contents of embodiments of the present invention will be described with reference to the drawings and the like. However, the present invention includes many different aspects and should not be construed as being limited to the content of the embodiments illustrated below. In order to make the description clearer, the drawings may schematically show the width, thickness, shape, etc. of each part compared to the actual embodiment, but this is only an example and does not limit the content of the present invention. not something to do. In addition, in this specification, when a certain element described in a certain drawing and a certain element described in another drawing are the same or have a corresponding relationship, the same reference numerals (or numbers Reference numerals such as a, b, etc. are attached later, and repeated description may be omitted as appropriate. Further, the letters "first" and "second" for each element are convenient labels used to distinguish each element and have no further meaning unless otherwise specified.

[First embodiment]
A square steel pipe column joint structure according to an embodiment of the present invention has a structure in which a first square steel pipe column and a second square steel pipe column are joined by bolt joint. FIG. 1(A) shows a developed view of a bolted joint in the joint structure of square steel pipe columns according to the present embodiment, and FIG. 1(B) is a perspective view of the bolted joint in the joint structure of square steel pipe columns according to the present embodiment. Figure shows. Fastening members such as bolts and nuts are omitted in FIG.

FIG. 1A illustrates a case where the cross-sectional shapes of the first square steel pipe column 102 and the second square steel pipe column 112 are rectangular. A first flange 104 is provided at one end of the first square steel pipe column 102 corresponding to each surface, and a second flange 114 is provided at one end of the second square steel pipe column 112 corresponding to each surface. be done. That is, the first square steel pipe column 102 has four first flanges 104 corresponding to the four faces, and the second square steel pipe column 112 has the second flanges 104 corresponding to the four faces. are provided at four locations. The first flange 104 includes a plurality of first bolt holes 106 through which bolts pass, and the second flange 114 includes a plurality of second bolt holes 116 through which bolts pass.

The first rectangular steel pipe column 102 and the second rectangular steel pipe column 112 have substantially the same thickness and substantially the same cross-sectional shape. On the other hand, the thickness of the first flange 104 and the second flange 114 is different from the thickness of the first rectangular steel pipe column 102 and the second rectangular steel pipe column 112 . In this embodiment, the first flange 104 and the second flange 114 are thicker than the first rectangular steel pipe column 102 and the second rectangular steel pipe column 112 . The thickness of the first flange 104 is compared to the area of the orthogonal cross section in the material axial direction of the first square steel pipe column 102, and the area of the orthogonal cross section in the material axial direction of the first flange 104 for four faces. Greater than the sum is preferred. The thickness of the second flange 114 is similar. For example, the plate thickness of the first flange 104 and the second flange 114 is 1.2 to 3 times the thickness of the first square steel pipe column 102 and the second square steel pipe column 112, preferably 1 .5 to 2 times the thickness. The first rectangular steel pipe column 102, the second rectangular steel pipe column 112, the first flange 104, and the second flange 114 are made of steel material. For example, these members are formed from rolled structural steel.

The length of the first flange 104 and the second flange 114 (length in the axial direction of the square steel pipe column) may be any length that allows a plurality of bolts to be arranged in series, and the width is the first should be smaller than the outer diameter of the rectangular steel pipe column 102 and the second rectangular steel pipe column 112 . In addition, the width of the first flange 104 and the second flange 114 is approximately so that when one end of the first rectangular steel pipe column 102 and one end of the second rectangular steel pipe column 112 are butted against each other, they face each other. have the same dimensions.

The first flange 104 is joined to one end of the first square steel pipe column 102 by welding, and the second flange 114 is joined to one end of the second square steel pipe column 112 by welding. A first splint 130 and a second splint 140 are used to bolt together the first flange 104 and the second flange 114 . First flange 104 and second flange 114 are sandwiched between first splint plate 130 and second splint plate 140 and bolted together. For example, the first splint 130 is positioned on the outside of the first square steel tube column 102 and the second square steel tube column 112, and the second splint 140 is placed on the first square steel tube column 102 and the second square steel tube column. It is arranged inside the pillar 112 .

The first splint plate 130 has a third bolt hole 132 at a position corresponding to the first bolt hole 106 and a fourth bolt hole 134 at a position corresponding to the second bolt hole 116 . The second splint plate has a fifth bolt hole 142 corresponding to the first bolt hole 106 and a sixth bolt hole 144 corresponding to the second bolt hole 116 . The first splint plate 130 and the second splint plate 140 are arranged between the first flange 104 and the second flange when one end of the first square steel pipe column 102 and one end of the second square steel pipe column 112 are butted against each other. 114 and has a size that overlaps both. The first splint plate 130 and the second splint plate 140 only need to have a length (length in the axial direction) that allows them to overlap the first flange 104 and the second flange 114. , may not necessarily be the same with respect to width. For example, the first splint plate 130 and the second splint plate 140 may be divided into a plurality of parts in the width direction. Also, one of the first splint plate 130 and the second splint plate 140 may be omitted. For example, if only one of the first splint plate 130 and the second splint plate 140 can ensure a sufficient bonding strength, the other splint plate may be omitted.

First splint 130 and second splint 140, like first flange 104 and second flange 114, are formed of a steel material. The thickness of the first splint 130 and the second splint 140 may be substantially the same as the thickness of the first square steel pipe column 102 and the second square steel pipe column 112, The thickness may be large to increase the strength of the bolted joint 100a. In addition, the thickness of the first splint plate 130 and the second splint plate 140 is the same as the thickness of the first square steel pipe column 102 and the second flange 114 due to the thickness of the first flange 104 and the second flange 114. It can also be thinner than the thickness of the rectangular steel pipe column 112 .

A first auxiliary plate 105 is provided on the first square steel pipe column 102 so as to continue from the first flange 104 , and a second auxiliary plate 105 is provided on the second square steel pipe column 112 so as to continue from the second flange 114 . auxiliary plate 115 is provided. The first auxiliary plate 105 has a thickness equal to or greater than the difference between the thickness of the first flange 104 and the thickness of the first rectangular steel pipe column 102 . The second auxiliary plate 115 also has a thickness equal to or greater than the difference between the thickness of the second flange 114 and the thickness of the second rectangular steel pipe column 112 . The first auxiliary plate 105 and the second auxiliary plate 115 are made of steel. The first auxiliary plate 105 is welded to the first square steel pipe column 102, and the second auxiliary plate 115 is welded to the second square steel pipe column 112, respectively.

The first square tubular column 102 has a first gap 108 at the corner adjacent to the first flange 104 and the second square tubular column 112 has a second gap at the corner adjacent to the second flange 114 . has a gap portion 118 of . As shown in FIG. 1A, a first gap 108 exists between two adjacent first flanges 104 and a second gap 118 exists between two adjacent second flanges 114. exists in The first gaps 108 are preferably provided at each corner of the first square steel pipe column 102, but may be provided at two diagonal corners, and at least one corner may be provided at each corner. It is required to be provided in This also applies to the second gap portion 118 . The first gap portion 108 and the second gap portion 118 are formed at respective opposite corners when one ends of the first square steel pipe column 102 and the second square steel pipe column 112 are butted against each other. be provided.

FIG. 1(B) shows a state in which the first square steel pipe column 102 and the second square steel pipe column 112 are bolted together. The bolt joint 100a is formed by a first splint plate 130 and a second splint plate 140 sandwiching a first flange 104 and a second flange 114, a first bolt hole 106, a third bolt hole 132, and a bolt joint 100a. The fifth bolt hole 142 is in communication, and the second bolt hole 116, the fourth bolt hole 134, and the sixth bolt hole 144 are arranged in communication. A bolt is inserted through these communicating bolt holes and fastened with a nut.

FIG. 2 shows a front view of a bolt joint 100a in a joint structure of square steel pipe columns. The first flange 104 is welded to the first square steel pipe column 102 and the second flange 114 is welded to the second square steel pipe column 112 . The first flange 104 and the first square steel pipe column 102 are welded so that their back sides are flush, and the second flange 114 and the second square steel pipe column 112 are welded so that their back sides are flush. be done. The first welded portion 126 a is formed at the boundary portion between the first flange 104 and the first square steel pipe column 102 and at the boundary portion between the second flange 114 and the second square steel pipe column 112 . The first flange 104 is provided so as to protrude from the outer surface of the first square steel pipe column 102 by the thickness difference, and the second flange 114 is provided to protrude from the outer surface of the second square steel pipe column 112 by the thickness difference. be done. In addition, the contact metal 121 may be provided on the back side surface of the rectangular steel pipe column in the first welded portion 126a.

The first auxiliary plate 105 is welded to the outer surface of the first square steel pipe column 102 and the second auxiliary plate 115 is welded to the outer surface of the second square steel pipe column 112 . The second welded portion 126b is provided along the outer peripheries of the first auxiliary plate 105 and the second auxiliary plate 115 . Also, the first auxiliary plate 105 is welded to the first flange 104 and the first square steel pipe column 102 at the first welded portion 126a, and the second auxiliary plate 115 is welded at the first welded portion 126a to the second It is welded with the flange 114 and the second square steel pipe column 112 .

When the thickness of the first auxiliary plate 105 is substantially the same as the difference between the thickness of the first flange 104 and the thickness of the first square steel pipe column 102, the first flange 104 is the thickness of the first square steel pipe column 102. It can be aligned with the height protruding from the outer surface. Also, if the thickness of the first auxiliary plate 105 is thicker than the difference between the thickness 104 of the first flange and the thickness of the first square steel pipe column 102 , it can protrude higher than the first flange 104 . The same applies to the thickness of the second auxiliary plate 115 in relation to the thickness of the second flange 114 and the second rectangular steel pipe column 112 . In this way, the auxiliary plate (first auxiliary plate 105, second auxiliary plate 115) is connected to the flange (first flange 104, second flange 114) by the square steel pipe column (first square steel pipe column 102, second By setting the height to be substantially the same as or higher than the height protruding from the square steel pipe column 112) of No. 2, in the region adjacent to the bolt joint 100a, the first square steel pipe column 102 and the second square steel pipe column 112 The thickness of the first flange 104 and the second flange 114 can be substantially increased, the strength of the bolt joint 100a can be increased, and the flanges can be stably joined to the square steel pipe column. .

Although the dimensions of the first auxiliary plate 105 and the second auxiliary plate 115 in plan view are not particularly limited, for example, the length and width of the first flange 104 and the second flange 114 are substantially the same. may have dimensions. In any case, by joining the first auxiliary plate 105 to the first flange 104 and the first rectangular steel pipe column 102, the strength of the bolt joint portion 100a can be increased.

FIG. 3 shows the cross-sectional structure of the bolt joint 100a when cross-sectionally viewed between A1-B1 shown in FIG. A bolt joint 100 a is formed on each surface of the first square steel pipe column 102 . FIG. 3 shows the bolt joints 100a formed on each surface of the first square steel pipe column 102 in clockwise order as the first bolt joint 100a_1, the second bolt joint 100a_2, and the third bolt joint 100a_3. , as a fourth bolted connection 100a_4. The first flange 104 is sandwiched between the first splint plate 130 and the second splint plate 140 at the first bolt joint 100a_1. A bolt 122 is inserted through the first bolt hole 10a, the third bolt hole 132, and the fifth bolt hole 142 and fastened with a nut 124. As shown in FIG. The first flange 104 protrudes from the outer surface because its plate thickness is greater than the thickness of the first square steel pipe column 102 . At the first bolt joint portion 100a_1, the first flange 104 and the first support plate 130 and the second support plate 140 are bolted at a plurality of locations. Such a structure is the same for the second bolted joint 100a_2, the third bolted joint 100a_3, and the fourth bolted joint 100a_4.

The first square steel pipe column 102 has a first gap 108 formed at the corner. The first gap 108 is formed between the first bolt joint 100a_1 and the second bolt joint 100a_2, between the second bolt joint 100a_2 and the third bolt joint 100a_3, and between the third bolt joint 100a_3. They are formed between the joint portion 100a_3 and the fourth bolt joint portion 100a_4 and between the fourth bolt joint portion 100a_4 and the first bolt joint portion 100a_1, respectively. FIG. 3 shows that an opening 120 is formed corresponding to the first gap 108 . As shown in FIG. 1B, the opening 120 is formed by abutting one end of the first rectangular steel pipe column 102 and one end of the second rectangular steel pipe column 112 and joining them with a flange and splint plate. It is formed by combining the first gap 108 and the second gap 118 . The opening 120 eliminates the boundary between the inner space and the outer space of the first rectangular steel pipe column 102 and the second rectangular steel pipe column 112, and serves as a place that connects the inner space and the outer space.

As shown in FIG. 1B, the width of the first flange 104 and the second flange 114 and the width of the first support plate 130 and the second support plate 140 are substantially the same. Alternatively, the width of the first splint plate 130 and the second splint plate 140 is narrower than the width of the first flange 104 and the second flange 114 . In addition, the length of the first square steel pipe column 102 and the second square steel pipe column 112 of the opening 120 along the material axis direction can be longer than the length of the first splint plate 130 in the material axis direction. . In other words, the axial length of each of the first splint 130 and the second splint 140 can be shorter than the combined length of the first flange 104 and the second flange 114 . The first flange 104 and the second flange 114 and the first splint plate 130 and the second splint plate 140 have such a dimensional relationship, thereby maintaining the strength of the bolt joint 100a and opening the opening. It is possible to prevent the portion 120 from becoming smaller.

The joint structure of the square steel pipe column according to the present embodiment has an opening 120 in the bolt joint 100a. And by being larger than the thickness of the second rectangular steel pipe column 112, the strength of the bolt joint 100a can be increased. In addition, since the bolt joint 100a has the opening 120, the width of the first flange 104 and the second flange 114 is smaller than the width of the first square steel pipe column 102 and the second square steel pipe column 112, When the thickness of the first flange 104 and the second flange 114 is made thicker than the steel pipe, the first square steel pipe column 102 and the second square steel pipe column 112 and the first flange 104 and the second flange 114 It is preferable to increase the strength at the interface. For this reason, at the ends of the first flange 104 and the second flange 114 protruding from the outer surface of the first square steel pipe column 102 and the second square steel pipe column 112, the first auxiliary plate 105 and the second By joining the auxiliary plate 115, the strength of the interface between the first square steel pipe column 102 and the second square steel pipe column 112 and the first flange 104 and the second flange 114 can be increased. Furthermore, the stress transmitted from the first flange 104 and the second flange 114 is borne by the first auxiliary plate 105 and the second auxiliary plate 115 together with the first rectangular steel pipe column 102 and the second rectangular steel pipe column 112. Therefore, it is possible to reduce stress concentration at the interface between the first square steel pipe column 102 and the second square steel pipe column 112 and the first flange 104 and the second flange 114, and the first square steel pipe It is possible to increase the strength of the column 102 and the second square steel pipe column 112 and the entire bolt joint 110a therebetween.

The joint structure for square steel pipe columns according to an embodiment of the present invention can facilitate construction of the bolt joints 100a by having the openings 120 corresponding to the corners of the square steel pipe columns. As a result, when joining the first square steel pipe column 102 and the second square steel pipe column 112, the operator can use the opening 120 to insert the bolt 122 into the bolt hole from the inside to join the bolt joint. becomes easy to form. The height of the opening 120 should be about the same as the total length of the length of the first flange 104 (the length in the axial direction of the square steel pipe column) and the length of the second flange 114 (same). The width of the opening 120 can be appropriately set according to the thickness of the square steel pipe column. Therefore, it is possible to provide an opening 120 large enough for a worker to insert a bolt, a tool, or the like inside the square steel pipe column for work. In such a configuration, as described above, the plate thickness of the first flange 104 and the second flange 114 is made larger than the thickness of the first rectangular steel pipe column 102 and the second rectangular steel pipe column 112, and Since the first auxiliary plate 105 and the second auxiliary plate 115 are provided, sufficient strength of the bolt joint portion 100a can be ensured even if the opening portion 120 is provided.

Although the present embodiment shows a joint structure for square steel pipes, one embodiment of the present invention is not limited to this aspect, and can be applied equally to deformed steel pipes.

[Second embodiment]
This embodiment shows a configuration in which the arrangement of flanges and auxiliary plates is different from that of the first embodiment. In the following description, the differences from the first embodiment will be mainly described.

FIG. 4 shows a front view of a bolt joint 100a in the joint structure of square steel pipe columns according to the present embodiment. The joint structure of the square steel pipe column according to the present embodiment differs from that of the first embodiment in the mounting positions of the flange and the auxiliary plate to the square steel pipe column. The first flange 104 is provided flush with the outer surface of the first rectangular steel pipe column, and the second flange 114 is provided flush with the outer surface of the second rectangular steel pipe column 112 . Also, the first auxiliary plate 105 is provided on the inner surface of the first square steel pipe column 102 adjacent to the first flange 104, and the second auxiliary plate 115 is provided adjacent to the second flange 114 to the second is provided on the inner surface of the square steel pipe column 112. In addition, the contact metal 121 may be provided inside the rectangular steel pipe column in the first welded portion 126a.

The first flange 104 is welded to the first square steel pipe column 102 and the second flange 114 is welded to the second square steel pipe column 112 . At these first welds 126 a , a pad (not shown) may be provided on the outer surface of the first square steel pipe column 102 and the second square steel pipe column 112 . The first auxiliary plate 105 is welded to the inner surface of the first square steel pipe column 102 and the second auxiliary plate 115 is welded to the inner surface of the second square steel pipe column 112 . Also, the first auxiliary plate 105 is welded to the first flange 104 and the first square steel pipe column 102 at the first welded portion 126a, and the second auxiliary plate 115 is welded at the first welded portion 126a. 2 flanges 114 and the second square steel tube column 112 are welded. Since such welding is performed before joining the first rectangular steel pipe column 102 and the second rectangular steel pipe column 112, the work can be performed easily.

FIG. 5 shows the cross-sectional structure of the bolt joint 100a when cross-sectionally viewed between A2-B2 shown in FIG. The first flange 104 is sandwiched between the first support plate 130 and the second support plate 140 and bolted to the first bolt joint portion 100a_1. Since the first flange 104 is provided flush with the outer surface of the first square steel pipe column 102, it is provided so as to protrude inward. Also in such a configuration, the first flange 104 forming the first bolted joint 100a_1 has openings 120 on both sides, so that the adjacent second bolted joint 100a_2 and fourth bolted joint 100a_2 and the fourth bolted joint 100a_2 are adjacent to each other. It can be arranged so as not to interfere with 100a_4.

According to this embodiment, since the first flange 104 and the second flange 114 are provided so as to be flush with the outer surfaces of the first square steel pipe column 102 and the second square steel pipe column 112, It can be a structure that does not protrude into. Furthermore, since it is provided on the inner surfaces of the first auxiliary plate 105 and the second auxiliary plate 115, it can be prevented from being exposed to the outside. With such a configuration, the structure of the bolt joint portion 100a can be made inconspicuous while increasing the strength of the joint structure between the first embodiment and the square steel pipe column.

[Third Embodiment]
This embodiment shows a mode in which the configuration of the auxiliary plate is different from the joint structure of the square steel pipe column according to the first embodiment. In the following, portions different from the first embodiment will be described.

FIG. 6 shows a front view of the bolt joint 100a of the joint structure of the square steel pipe column according to the present embodiment. The first auxiliary plate 105 is joined with the first square steel pipe column 102 and the second auxiliary plate 115 is joined with the second square steel pipe column 112 . The first auxiliary plate 105 and the second auxiliary plate 115 have notches 128 in plan view. That is, the first auxiliary plate 105 and the second auxiliary plate 115 are not simple rectangular flat plates, but have a rectangular flat plate with a notch 128 in a part thereof.

The first auxiliary plate 105 is welded along the outer circumference on the outer surface of the first square steel pipe column 102, and the second auxiliary plate 115 is welded along the outer circumference on the outer surface of the second square steel pipe column 112. be done. By having the notch 128, the strength of the weld joint of the first auxiliary plate 105 to the first square steel pipe column 102 and the strength of the weld joint of the second auxiliary plate 115 to the second square steel pipe column 112 are increased. It is possible to secure the length of the welding region required to secure the length by using the first auxiliary plate 105 and the second auxiliary plate 115 having smaller areas. The shape of the notch 128 for the first auxiliary plate 105 and the second auxiliary plate 115 is arbitrary, and a plurality of notches 128 may be provided in addition to the illustrated structure.

According to this embodiment, the notch 128 is provided in the auxiliary plate, so that the strength of the bolt joint can be further increased. Such configuration of the notch 128 for the auxiliary plate can be applied to one or both of the first auxiliary plate 105 and the second auxiliary plate 115 . Although this embodiment has been described in accordance with the structure of the first embodiment, the configuration of the auxiliary plate according to this embodiment can also be applied to the joint structure of square steel pipe columns according to the second embodiment. can be done.

[Fourth embodiment]
This embodiment shows a configuration in which a web is added to the joint structure of square steel pipe columns shown in the first embodiment.

FIG. 7(A) shows a development view of a bolt joint in the joint structure of square steel pipe columns according to the present embodiment, and FIG. 7(B) shows a perspective view of the bolt joint in the joint structure of square steel pipe columns. In the following, portions different from the first embodiment will be described.

As shown in FIG. 7A, a first web 150 connected to the first flange 104 is provided inside the first square steel pipe column 102 . The second square steel pipe column 112 is similarly provided with a second web 160 connected with the second flange 114 . The first web 150 and the second web 160 have a substantially cross-shaped cross section, and are provided so as to be connected to respective flanges provided corresponding to respective faces of the rectangular steel pipe column. As shown in FIG. 7B, the first web 150 and the second web 160 are provided so as not to block the opening 120 at the bolt joint 100b.

FIG. 8 shows a front view of a bolt joint 100b in the joint structure of square steel pipe columns according to the present embodiment. A first web 150 is provided to contact each of the first flanges 104 and a second web 160 is provided to contact each of the second flanges 114 . The axial lengths of the first web 150 and the second web 160 are arbitrary. For example, as shown in FIG. 8, the first web 150 has a length that can contact the first flange 104 and the first square steel pipe column 102, and the second web 160 has a length that can contact the second flange 114. and may have a length that allows contact with the second square steel pipe column 112 . Since the first web 150 and the second web 160 have such lengths, even when the plate thickness of the first flange 104 and the second flange 114 is increased, the first square steel pipe column 102 and can be stably attached to the second rectangular steel pipe column 112 .

FIG. 9 shows the cross-sectional structure of the bolt joint 100b when cross-sectionally viewed between A3-B3 shown in FIG. 8, and shows the schematic structure when looking at the first square steel pipe column 102 side. The first web 150 may be formed to have a cross-sectional shape by combining plate members. With such a shape, the first web 150 is connected to each of the first flanges 104 arranged corresponding to each side surface of the first square steel pipe column 102 . In this case, the second attachment plate 140 arranged inside the first flange 104 may be divided into a plurality of pieces so as not to interfere with the first web 150 . The position where the first web 150 is connected to the first flange 104 does not overlap with the bolt hole, so that the second splint plate 140 can be attached to the first flange 104 and bolted securely. can do.

The connection between the first web 150 and the first flange 104 and the connection between the second web 160 and the second flange 114 can be made by welding. Welding the first web 150 to the first flange 104 acts on the first bolted joint 100b_1, the second bolted joint 100b_2, the third bolted joint 100b_3, and the fourth bolted joint 100b_4. You can disperse the force that As a result, for example, resistance to shear forces acting on the bolted joint 100b can be increased. Such a configuration is the same for the second web 160b in the second rectangular steel pipe column 112 as well.

Although not shown, a support plate may be provided over the first web 150 and the second web 160, and the webs may be joined with bolts. Such a configuration can further increase the strength of the bolted joint portion 100b.

The joint structure of square steel pipe columns according to this embodiment has the same configuration as that of the first embodiment except that the web is provided. Therefore, in addition to obtaining the same effects as in the first embodiment, the strength of the bolt joint portion 100b can be further increased by the action of the web as described above. The configuration of the web according to this embodiment can be appropriately combined with the joint structures of the square steel pipe columns according to the second and third embodiments.

[Fifth embodiment]
This embodiment shows a mode in which the plate thickness of the flange forming the bolt joint can be substantially increased by a structure different from that of the first embodiment. FIG. 10(A) shows a developed view of the bolted joint in the joint structure of the square steel pipe column according to the present embodiment, and FIG. 10(B) is a perspective view of the bolted joint in the joint structure of the square steel pipe column according to the present embodiment. Figure shows. Fastening members such as bolts and nuts are omitted in FIG. 10(A). In the following description, the differences from the first embodiment will be mainly described.

As shown in FIG. 10(A) , a first flange 104 is provided at one end of the first square steel pipe column 102 and a second flange 114 is provided at one end of the second square steel pipe column 112 . The first flange 104 is made of the same member continuous from the first square steel pipe column 102 , and the second flange 114 is made of the same member continuous from the second square steel pipe column 112 . For example, the first flange 104 is formed by notching the end of the first square steel pipe column 102, and the second flange 114 is formed by notching the end of the second square steel pipe column 112. . As a result, a first notch portion 109 is formed at the corner of the first square steel pipe column 102 and a second notch portion 119 is formed at the corner of the second square steel pipe column 112 . The thickness of the first flange 104 is the same as the thickness of the first square steel pipe column 102 , and the thickness of the second flange 114 has the thickness of the second square steel pipe column 112 .

A first auxiliary plate 105 is provided on the first rectangular steel pipe column 102 , and a second auxiliary plate 115 is provided on the second rectangular steel pipe column 112 . The first auxiliary plate 105 is provided so as to overlap the first flange 104 and the outer surface of the first square steel pipe column 102 , and the second auxiliary plate 115 is provided so as to overlap the second flange 114 and the second square steel pipe column 112 . provided to overlap the outer surface of the The first auxiliary plate 105 overlaps the first flange 104 and has a size that overlaps the outer surface of the first square steel pipe column 102 continuously from the first flange 104 . Similarly, the second auxiliary plate 115 overlaps the second flange 114 and has a size that overlaps the outer surface of the second square steel pipe column 112 continuously from the second flange 114 . The area over which the first auxiliary plate 105 overlaps the outer surface of the first square steel pipe column 102 may be equal to or greater than the area over which the first flange 104 overlaps. Similarly, the area over which the second auxiliary plate 115 overlaps the outer surface of the second square steel pipe column 112 may be equal to or greater than the area over which the second flange 114 overlaps.

The thickness of the first auxiliary plate 105 may be the same as or thicker than the thickness of the first square steel pipe column 102, and the thickness of the second auxiliary plate 115 may be the same as the thickness of the second square steel pipe column 112. or thicker. The first auxiliary plate 105 is welded to the first flange 104 and the first square steel pipe column 102, and the second auxiliary plate 115 is welded to the second flange 114 and the second square steel pipe column 112. be done. With such a configuration, the first flange 104 has a structure equivalent to that increased in thickness by the thickness of the first auxiliary plate 105, and the second flange 114 has the thickness of the second auxiliary plate 115. It has the same structure as the one with the thickness increased by the same amount. In addition, the first square steel pipe column 102 has a structure equivalent to that in which the thickness is increased by the thickness of the first auxiliary plate 105 in the region adjacent to the first flange 104, and the second square steel pipe The pillar 112 has a structure equivalent to that in which the thickness is increased by the thickness of the second auxiliary plate 115 in the area adjacent to the second flange 114 .

In addition, the first auxiliary plate 105 and the second auxiliary plate 115 only need to have a continuous length from the portion where the flange is formed in the material axial direction to the main body portion of the square steel pipe column, and the width direction ( It may be divided into a plurality of pieces in the direction intersecting with the material axial direction).

The first auxiliary plate 105 has a seventh bolt hole 152 at a position overlapping the first bolt hole 106 provided in the first flange 104, and the second auxiliary plate 115 is provided in the second flange 114. An eighth bolt hole 162 is provided at a position overlapping the second bolt hole 116 . Similar to the first embodiment, the first flange 104 and the second flange 114 are bolted together by a first splint plate 130 and a second splint plate 140. The difference is that the first auxiliary plate 105 and the second auxiliary plate 115 are interposed between the first auxiliary plate 130 and the second auxiliary plate 140 .

As shown in FIG. 10A, a first notch 109 is provided to divide two adjacent first flanges 104, and a second notch 119 is provided to divide two adjacent second flanges. It is provided so as to divide the flange 114 . The first notch 109 is preferably provided at each corner of the first square steel pipe column 102, but may be provided at two diagonal corners, and may be provided at at least one corner. required to be provided. The same applies to the second notch 119 as well.

The first flange 104 and the second flange 114 are arranged on each square steel pipe column such that when one end of the first square steel pipe column 102 and one end of the second square steel pipe column 112 are butted against each other, they face each other. have substantially the same width at the same cross-sectional position. In addition, the first notch portion 109 and the second notch portion 119 are formed at the respective corners facing each other when one ends of the first square steel pipe column 102 and the second square steel pipe column 112 are butted against each other. provided in the department.

FIG. 10(B) shows a state in which the first square steel pipe column 102 and the second square steel pipe column 112 are bolted together. At the bolt joint 100c, the first support plate 130 and the second support plate 140 sandwich the first flange 104, the second flange 114, the first support plate 105, and the second support plate 115. , the first bolt hole 106, the third bolt hole 132, the fifth bolt hole 142 and the seventh bolt hole 152 communicate with each other, the second bolt hole 116, the fourth bolt hole 134 and the sixth bolt hole The hole 144 and the eighth bolt hole 162 are arranged so as to communicate with each other. A bolt is inserted through these communicating bolt holes and fastened with a nut.

FIG. 11 shows a front view of the bolted joint 100c. The first flange 104 has a shape continuous from the first square steel pipe column 102 and the second flange 114 has a shape continuous from the second square steel pipe column 112 . The first auxiliary plate 105 is provided so as to overlap the first flange 104 and the outer surface of the first square steel pipe column 102 , and the second auxiliary plate 115 is provided so as to overlap the second flange 114 and the second square steel pipe column 112 . provided to overlap the outer surface of the

The first auxiliary plate 105 has a second welded portion 126b welded along the outer peripheral portion in the region overlapping the first square steel pipe column 102 . The second auxiliary plate 115 has a second welded portion 126b in which the outer peripheral portion is welded in a region overlapping with the second square steel pipe column 112 . The first flange 104 and the first square steel pipe column 102 are welded to the first auxiliary plate 105 so that the thickness of that part becomes substantially thicker, and the second flange 114 and The second square steel pipe column 112 is welded to the second auxiliary plate 115, so that the thickness of that portion becomes substantially thicker. This makes it possible to increase the rigidity of the portion forming the bolt joint portion 100c.

FIG. 12 shows the cross-sectional structure of the bolt joint 100c when cross-sectionally viewed between A4-B4 shown in FIG. 11, and shows the schematic structure when looking at the first square steel pipe column 102 side. The first flange 104 and the first auxiliary plate 105 are sandwiched between the first splint plate 130 and the second splint plate 140 at the first bolt joint 100c_1. A bolt 122 is inserted through the first bolt hole 106 , the third bolt hole 132 , the fifth bolt hole 142 and the seventh bolt hole 152 and fastened with a nut 124 . The first auxiliary plate 105 is provided so as to protrude from the outer surface of the first square steel pipe column 102 . At the bolt joint 100c, the first flange 104 and the first auxiliary plate 105 are sandwiched between the first support plate 130 and the second support plate 140 and bolted at a plurality of locations. Such a structure also applies to the second bolted joint 100c_2, the third bolted joint 100c_3, and the fourth bolted joint 100c_4.

The first square steel pipe column 102 has openings 120 corresponding to corners corresponding to the first cutouts 109 . As shown in FIG. 10B, the opening 120 is formed by butting one end of the first rectangular steel pipe column 102 and one end of the second rectangular steel pipe column 112 and joining them with a flange and splint plate. It is formed by combining the first gap 108 and the second gap 118 . These openings 120 eliminate the boundary between the inner space and the outer space of the first square steel pipe column 102 and the second square steel pipe column 112, and connect the inner space and the outer space.

The joint structure of the square steel pipe column according to the present embodiment includes a first auxiliary plate 105 continuous from the first flange 104 to the outer surface of the first square steel pipe column 102, and a second flange 114 to the second square By having the second auxiliary plate 115 continuous over the outer surface of the steel pipe column 112, the thickness of the bolt joint 100c can be increased and the strength can be enhanced. Moreover, by having the openings 120 corresponding to the corners of the square steel pipe column, the bolt joints 100c can be easily constructed as in the first embodiment. In such a configuration, the plate thickness of the first flange 104 and the second flange 114 is substantially thicker than the thickness of the first rectangular steel pipe column 102 and the second rectangular steel pipe column 112, so the opening 120 is Even if it is provided, the strength of the bolt joint portion 100c can be sufficiently ensured.

[Sixth embodiment]
This embodiment shows a configuration in which the arrangement of flanges and auxiliary plates is different from the joint structure of square steel pipe columns according to the fifth embodiment. In the following description, the differences from the fifth embodiment will be mainly described.

FIG. 13 shows a front view of the bolt joint 100c of the joint structure of the square steel pipe column according to this embodiment. In this embodiment, the bolt joint 100c is different from the fifth embodiment in the attachment position of the auxiliary plate to the rectangular steel pipe column. The first auxiliary plate 105 is provided on the inner surface of the first flange 104 and the first square steel pipe column 102, and the second auxiliary plate 115 is provided on the inner surface of the second flange 114 and the second square steel pipe column 112. provided in

The first auxiliary plate 105 is welded to the first square steel pipe column 102 and the first flange. For example, the first auxiliary plate 105 is welded to the inner surface of the first square steel pipe column 102 at the second weld 126b formed along its outer circumference. Also, the second auxiliary plate 115 is welded to the inner surface of the second square steel pipe column 112 at a second welded portion 126b formed along its outer periphery. Since such welding is performed before joining the first rectangular steel pipe column 102 and the second rectangular steel pipe column 112, the work can be performed easily.

FIG. 14 shows the cross-sectional structure of the bolt joint 100c when cross-sectionally viewed between A4-B4 shown in FIG. The first flange 104 and the first auxiliary plate 105 are bolted while sandwiched between the first support plate 130 and the second support plate 140 at the first bolt joint portion 100c_1. The first auxiliary plate 105 is provided so as to protrude inside the first square steel pipe column 102 . Also in such a configuration, the first flange 104 forming the first bolt joint 100c_1 has openings 120 (first opening 120a and fourth opening 120b) on both sides, thereby can be arranged so as not to interfere with the second bolted joint 100c_2 and the fourth bolted joint 100c_4.

The joint structure of the square steel pipe column according to the present embodiment is different from the structure according to the fifth embodiment except for the arrangement of the first auxiliary plate 105 and the second auxiliary plate 115. It is the same. Therefore, the joint structure of square steel pipe columns according to the present embodiment can also obtain the same effects as those in the fifth embodiment. Furthermore, in this embodiment, since the first auxiliary plate 105 and the second auxiliary plate 115 are provided inside the rectangular steel pipe column, these members can be prevented from being exposed to the outside. With such a configuration, it is possible to make the complicated structure of the bolted joint 100c inconspicuous while enhancing the strength of the bolted joint 100c as in the fifth embodiment.

[Seventh Embodiment]
This embodiment shows a mode in which the configuration of the auxiliary plate is different from the joint structure of the square steel pipe column according to the fifth embodiment. In the following, portions different from the fifth embodiment will be described.

FIG. 15 shows a front view of the bolt joint 100c of the joint structure of the square steel pipe column according to the present embodiment. The first auxiliary plate 105 is joined with the first flange 104 and the first square steel pipe column 102 , and the second auxiliary plate 115 is joined with the second flange 114 and the second square steel pipe column 112 . The first auxiliary plate 105 and the second auxiliary plate 115 have notches 128 in plan view.

The configuration of the notch 128 provided in the first auxiliary plate 105 and the second auxiliary plate 115 is the same as in the third embodiment. As a result, the strength of welding connection of the first auxiliary plate 105 to the first square steel pipe column 102 and the strength of welding connection of the second auxiliary plate 115 to the second square steel pipe column 112 are secured. It is possible to ensure the length of the welded region even when the areas where the first auxiliary plate 105 and the second auxiliary plate 115 overlap the first steel pipe column 102 and the second steel pipe column 112, respectively, are reduced. .

According to this embodiment, one or both of the first auxiliary plate 105 and the second auxiliary plate 115 are provided with the notch portion 128, so that the strength of the bolt joint portion 100c can be further increased. In addition, the structure of the auxiliary plate in this embodiment can also be applied to the joint structure of the square steel pipe column according to the sixth embodiment.

[Eighth Embodiment]
This embodiment shows a configuration in which a web is added to the joint structure of square steel pipe columns shown in the fifth embodiment.

FIG. 16(A) shows a developed view of a bolted joint in the square steel pipe column according to this embodiment, and FIG. 16(B) shows a perspective view of the bolted joint in the square steel pipe column. In the following, portions different from the fifth embodiment will be described.

As shown in FIG. 16(A), a first web 150 connected to the first flange 104 is provided inside the first square steel pipe column 102, and inside the second square steel pipe column 112, a second A second web 160 is provided that connects with the two flanges 114 . The first web 150 and the second web 160 have a substantially cross-shaped cross section, and are provided so as to be connected to respective flanges provided corresponding to respective faces of the rectangular steel pipe column. As shown in FIG. 16B, the first web 150 and the second web 160 are provided so as not to block the opening 120 at the bolt joint 100d.

FIG. 17 shows a front view of the bolt joint 100d. A first web 150 is provided to contact each of the first flanges 104 and a second web 160 is provided to contact each of the second flanges 114 . The axial lengths of the first web 150 and the second web 160 are arbitrary. For example, as shown in FIG. 8, the first web 150 has a length that can contact the first flange 104 and the first square steel pipe column 102, and the second web 160 has a length that can contact the second flange 114. and may have a length that allows contact with the second square steel pipe column 112 . Since the first web 150 and the second web 160 have such lengths, even when the plate thickness of the first flange 104 and the second flange 114 is increased, the first square steel pipe column 102 and can be stably attached to the second rectangular steel pipe column 112 .

FIG. 18 shows the cross-sectional structure of the bolt joint 100d when viewed in cross section between A5-B5 shown in FIG. 8, and shows the schematic structure when looking at the first square steel pipe column 102 side. The first web 150 can be formed of a plate-like member and has a substantially cross-shaped cross-section to be connected to each of the first flanges 104 . The second splint plate 140 arranged inside the first flange 104 may be divided into a plurality of pieces so as not to interfere with the first web 150 . The position where the first web 150 is connected to the first flange 104 does not overlap with the bolt hole, so that the second splint plate 140 can be attached to the first flange 104 and bolted securely. can do.

The connection between the first web 150 and the first flange 104 and the connection between the second web 160 and the second flange 114 can be made by welding. Welding the first web 150 to the first flange 104 provides mechanical strength. For example, it is possible to increase resistance to shear forces acting on the bolted joint 100d. Such a configuration is the same for the second web 160b in the second rectangular steel pipe column 112 as well.

Although not shown, a support plate may be provided over the first web 150 and the second web 160, and the webs may be joined with bolts. Such a configuration can further increase the strength of the bolted joint portion 100d.

The joint structure of square steel pipe columns according to this embodiment has the same configuration as that of the fifth embodiment except that the web is provided. Therefore, in addition to obtaining the same effect as the fifth embodiment, the action of the web allows the flange to be attached to the steel pipe column in a stable state as described above, and the strength of the bolt joint can be further increased. . The structure of the web according to this embodiment can be appropriately combined with the joint structures of the square steel pipe columns in the sixth and seventh embodiments.

DESCRIPTION OF SYMBOLS 100... Bolt joint part, 102... 1st square steel pipe column, 104... 1st flange, 105... 1st auxiliary plate, 106... 1st bolt hole, 108... 1st gap 109 1st notch 110 2nd gap 112 2nd rectangular steel pipe column 114 2nd flange 115 ... second auxiliary plate 116 ... second bolt hole 118 ... second gap 119 ... second notch 120 ... opening 121 ... 122 Bolt 124 Nut 126 Welded portion 128 Notch 127 Opening 130 First support plate 132 3rd bolt hole 134 4th bolt hole 140 2nd support plate 142 5th bolt hole 144 6th bolt hole 150 1st web 152 7th bolt hole 160 2nd web 162 8th bolt hole

Claims (17)

a first flange provided at one end of the first square steel pipe column;
a first gap provided at a corner of the first square steel pipe column adjacent to the first flange;
a second flange provided at one end of the second square steel pipe column;
a second gap provided at a corner of the second square steel pipe column adjacent to the second flange;
a first auxiliary plate joined to the surface of the first square steel pipe column and adjacent to the first flange;
a second auxiliary plate joined to the surface of the second square steel pipe column and adjacent to the second flange;
a first splint plate in contact with one surface of each of the first flange and the second flange;
The plate thickness of the first flange is thicker than the thickness of the first square steel pipe column, the plate thickness of the second flange is thicker than the thickness of the second square steel pipe column,
In a state in which one end of the first square steel pipe column and one end of the second square steel pipe column are butted against each other,
An opening is formed by the first gap and the second gap,
The first square steel pipe column and the second square steel pipe column are a square steel pipe column joint that is bolted using the first flange, the second flange, and the first splint plate. structure. The first flange is provided flush with the inner surface of the first square steel pipe column and protrudes from the outer surface of the first square steel pipe column, and the first auxiliary plate is the first square steel pipe column. Bonded to the outer surface of the steel pipe column,
The second flange is provided flush with the inner surface of the second square steel pipe column and protrudes from the outer surface of the second square steel pipe column, and the second auxiliary plate is the second square steel pipe column. The joint structure of a square steel pipe column according to claim 1, wherein the joint structure is joined to the outer surface of the steel pipe column. The first auxiliary plate has a plate thickness substantially equal to or greater than the height at which the first flange protrudes from the outer surface of the first square steel pipe column,
3. The square steel pipe column joint according to claim 2, wherein the second auxiliary plate has a plate thickness substantially equal to or greater than the height at which the second flange protrudes from the outer surface of the second square steel pipe column. structure. The first flange is provided flush with the outer surface of the first square steel pipe column and protrudes from the inner surface of the first square steel pipe column, and the first auxiliary plate is the first square steel pipe column. Bonded to the inner surface of the steel pipe column,
The second flange is provided flush with the outer surface of the second square steel pipe column and protrudes from the inner surface of the second square steel pipe column, and the second auxiliary plate is the second square steel pipe column. The joint structure of a square steel pipe column according to claim 1, wherein the joint structure is joined to the inner surface of the steel pipe column. The first auxiliary plate has a plate thickness substantially equal to or greater than the height at which the first flange protrudes from the inner surface of the first square steel pipe column,
5. The square steel pipe column joint according to claim 4, wherein the second auxiliary plate has a plate thickness substantially equal to or greater than the height at which the second flange protrudes from the inner surface of the second square steel pipe column. structure. The first flange is welded to the first rectangular steel pipe column, and the second flange is welded to the second rectangular steel pipe column according to any one of claims 1 to 5. Joint structure of square steel pipe columns. The joint structure for square steel pipe columns according to any one of claims 1 to 6, wherein at least one of the first auxiliary plate and the second auxiliary plate has a notch in plan view. a first web provided inside the first square steel pipe column and connected to the first flange;
The joint structure for square steel pipe columns according to any one of claims 1 to 7, further comprising a second web provided inside the second square steel pipe column and connected to the second flange. . The joint structure for square steel pipe columns according to any one of claims 1 to 8, further comprising a second splint plate on the opposite side of the first splint plate. a first flange provided at one end of the first square steel pipe column;
a first gap provided at a corner of the first square steel pipe column adjacent to the first flange;
a second flange provided at one end of the second square steel pipe column;
a second gap provided at a corner of the second square steel pipe column adjacent to the second flange;
a first auxiliary plate joined to the first flange and the first square steel pipe column;
a second auxiliary plate joined to the second flange and the second square steel pipe column;
a first splint plate sized to overlap the first flange and the second flange;
In a state in which one end of the first square steel pipe column and one end of the second square steel pipe column are butted against each other,
An opening is formed by the first gap and the second gap,
The first square steel pipe column and the second square steel pipe column include the first flange, the second flange, the first auxiliary plate, the second auxiliary plate, and the first attachment A joint structure for square steel pipe columns that are bolted using plates. The first auxiliary plate is welded to the side surface of the first flange,
The joint structure of the square steel pipe column according to claim 10, wherein the second auxiliary plate is welded to the side surface of the second flange. The first auxiliary plate is provided on the outer surface of the first flange and the first square steel pipe column,
The joint structure for square steel pipe columns according to claim 10 or 11, wherein the second auxiliary plate is provided on the outer surface of the second flange and the second square steel pipe column. The first auxiliary plate is provided on the inner surface of the first flange and the first square steel pipe column,
The joint structure for square steel pipe columns according to claim 10 or 11, wherein said second auxiliary plate is provided on inner surfaces of said second flange and said second square steel pipe column. The thickness of the first auxiliary plate is the same as or greater than the thickness of the first square steel pipe column, and the thickness of the second auxiliary plate is the same as or greater than the thickness of the second square steel pipe column. Item 14. The joint structure for square steel pipe columns according to any one of Items 10 to 13. The first auxiliary plate has a notch in a portion overlapping with the first square steel pipe column,
The joint structure for square steel pipe columns according to any one of claims 10 to 14, wherein the second auxiliary plate has a notch in a portion overlapping with the second square steel pipe column. a first web provided inside the first square steel pipe column and connected to the first flange;
16. The joint structure of the square steel pipe column according to any one of claims 10 to 15, further comprising a second web provided inside the second square steel pipe column and connected to the second flange. . The joint structure for square steel pipe columns according to any one of claims 10 to 16, further comprising a second splint plate on the opposite side of the first splint plate.

Images