JP7366698B2 - Steel pipe column joint structure - Google Patents

Description

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

At building construction sites, welding and bolting are used as methods for joining steel frame members. Although welding joints can in principle ensure sufficient strength, they require a high level of skill and work time, and the strength of the joints is influenced by the skill of the worker. On the other hand, bolted joints have the advantage of being able to shorten the construction period, being less affected by the skill of the worker, and facilitating quality control. There are various methods of bolt joining, and for example, a method of joining a steel pipe column and an H-shaped steel, and a method of joining steel pipe columns to each other are disclosed (see Patent Documents 1 and 2).

JP-A-5-179702 (Patent No. 3146209) JP2004-293196A (Patent No. 4038449)

When joining steel frame members with bolts, it is possible to easily bolt-join members with an open cross-sectional shape, such as H-shaped steel. However, when connecting tubular members such as square steel pipe columns with bolts, there is a problem in that construction is not easy because they have a closed cross-sectional shape. It is also possible to process a portion of the steel pipe column to facilitate bolt joint construction, but there is a concern that this may reduce the strength of the joint.

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

A joint structure for a steel pipe column according to an embodiment of the present invention includes a first diaphragm provided at one end of a first steel pipe column, and a joint structure that is fixed to the first diaphragm and that is fixed to the first diaphragm in the material axis direction of the first steel pipe column. A first flange arranged in parallel and having a first through hole, a second diaphragm provided at one end of a second steel pipe column, and a second diaphragm fixed to the second diaphragm and a material of the second steel pipe column. a second flange arranged parallel to the axial direction and having a second through hole; and a second flange fixed to the first diaphragm, arranged parallel to the material axis direction of the first steel pipe column, and adjacent to the first flange. a third flange fixed to the second diaphragm, arranged parallel to the material axis direction of the second steel pipe column and adjacent to the second flange, a first splint, and and a second splint. The first steel pipe column and the second steel pipe column are arranged in the vertical direction, and the first flange and the fourth flange, and the second flange and the third flange are arranged in parallel in the material axis direction. The first flange and the fourth flange are bolted together with the first splint, the second flange and the third flange are bolted together with the second splint, and the first through hole and the second through hole are bolted together. The holes are arranged in a diagonal manner.

According to a joint structure for steel pipes according to an embodiment of the present invention, a diaphragm is provided on each of the first steel pipe column and the second steel pipe column arranged above and below, and a flange having a through hole fixed to each diaphragm. By providing a plurality of through-holes and arranging at least one set of through-holes in an oblique manner, it is possible to facilitate the construction of bolted joints and to prevent a decrease in the strength of the joint portion.

1 is a perspective view of a joint structure of steel pipe columns according to an embodiment of the present invention, in which (A) shows a developed view, and (B) shows a bolt joint in the joint structure of two steel pipe columns. The front view of the bolt joint part in the joint structure of the steel pipe column concerning one embodiment of the present invention is shown. The cross-sectional structure of the bolt joint in the joint structure of the steel pipe column shown in FIG. 2 is shown, in which (A) shows the cross-sectional structure on the first steel pipe column side, and (B) shows the cross-sectional structure on the second steel pipe column side. 1 is a perspective view of a joint structure of steel pipe columns according to an embodiment of the present invention, in which (A) shows a developed view, and (B) shows a bolt joint in the joint structure of two steel pipe columns. The front view of the bolt joint part in the joint structure of the steel pipe column concerning one embodiment of the present invention is shown. The cross-sectional structure of a bolt joint in the steel pipe column joint structure shown in FIG. 5 is shown, in which (A) shows the cross-sectional structure on the first steel pipe column side, and (B) shows the cross-sectional structure on the second steel pipe column side. 1 is a perspective view of a joint structure of steel pipe columns according to an embodiment of the present invention, in which (A) shows a developed view, and (B) shows a bolt joint in the joint structure of two steel pipe columns. 1 is a perspective view of a joint structure for steel pipe columns according to an embodiment of the present invention, showing a bolt joint in the joint structure for two steel pipe columns. FIG. The cross-sectional structure of the bolt joint in the joint structure of the steel pipe column shown in FIG. 8 is shown, in which (A) shows the cross-sectional structure corresponding to the D1 line, and (B) shows the cross-sectional structure corresponding to the D2 line. 1 is a perspective view of a joint structure of steel pipe columns according to an embodiment of the present invention, in which (A) shows a developed view, and (B) shows a bolt joint in the joint structure of two steel pipe columns. The front view of the bolt joint part in the joint structure of the steel pipe column concerning one embodiment of the present invention is shown. 12 shows a cross-sectional structure of a bolt joint in the joint structure of the steel pipe column shown in FIG. 11. 1 is a perspective view of a joint structure of steel pipe columns according to an embodiment of the present invention, in which (A) shows a developed view, and (B) shows a bolt joint in the joint structure of two steel pipe columns. The cross-sectional structure of the bolt joint in the joint structure of the steel pipe column shown in FIG. 13 is shown, in which (A) shows the cross-sectional structure corresponding to the D3 line, and (B) shows the cross-sectional structure corresponding to the D4 line. 1 is a perspective view of a joint structure of steel pipe columns according to an embodiment of the present invention, in which (A) shows a developed view, and (B) shows a bolt joint in the joint structure of two steel pipe columns. The cross-sectional structure of the bolt joint in the joint structure of the steel pipe column shown in FIG. 15 is shown, in which (A) shows the cross-sectional structure on the first steel pipe column side, and (B) shows the cross-sectional structure on the second steel pipe column side. The cross-sectional structure of a bolt joint in a joint structure for steel pipe columns according to an embodiment of the present invention is shown, in which (A) shows the cross-sectional structure on the first steel pipe column side, and (B) shows the cross-sectional structure on the second steel pipe column side. Show the structure.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of embodiments of the present invention will be described below with reference to the drawings and the like. However, the present invention includes many different aspects and should not be interpreted as being limited to the contents of the embodiments illustrated below. In order to make the explanation clearer, the drawings may schematically represent the width, thickness, shape, etc. of each part compared to the actual aspect, but this is only an example and does not limit the content of the present invention. It's not something you do. In addition, in this specification, when an element depicted in a drawing and an element depicted in another drawing are the same or have a corresponding relationship, the same reference numerals (or numbers written as codes) are used. Reference numerals such as a, b, etc.) may be used to omit repeated explanations as appropriate. Furthermore, the characters ``first'' and ``second'' for each element are convenient signs used to distinguish each element, and have no further meaning unless otherwise specified.

[First embodiment]
A joint structure for steel pipe columns according to an embodiment of the present invention has a structure in which a first steel pipe column and a second steel pipe column are joined by a bolt joint. The joint structure will be explained in detail below.

FIG. 1(A) shows a developed view of a joint structure of a steel pipe column according to this embodiment, and FIG. 1(B) shows a perspective view thereof. Note that fastening members such as bolts and nuts are omitted in FIG. 1(A). Note that FIGS. 1A and 1B show a case where the first steel pipe column 102 and the second steel pipe column 112 are square steel pipe columns.

In the following description, for convenience, the first steel pipe column 102 has four surfaces, and each surface is referred to as a first surface 11, a second surface 12, a third surface 13, and a fourth surface 14 in a clockwise direction. Similarly, each surface of the second steel pipe column 112 is shown clockwise as a first surface 21, a second surface 22, a third surface 23, and a fourth surface 24. Further, unless otherwise specified, when the steel pipe columns are erected, the first steel pipe column 102 is placed on the lower side and the second steel pipe column 112 is placed on the upper side in the direction of the material axis.

As shown in FIG. 1(A), a first diaphragm 104 is provided at one end of a first steel pipe column 102, and a second diaphragm 114 is provided at one end of a second steel pipe column 112. The first diaphragm 104 and the second diaphragm 114 are welded to the first steel pipe column 102 and the second steel pipe column 112, respectively.

Attached to the first diaphragm 104 are first flanges 106a, 106b and third flanges 108a, 108b. The first flanges 106a and 106b have substantially the same shape, are erected on the first diaphragm 104, and are arranged to face each other at a predetermined interval. The third flanges 108a, 108b are erected on the first diaphragm 104, are oriented in a direction intersecting the direction in which the first flanges 106a, 106b are opposed, and are arranged to face each other at a predetermined interval. In FIG. 1A, the first flange 106a is on the 11th surface, the first flange 106b is on the 13th surface, the third flange 108a is on the 12th surface, and the third flange 108b is on the 14th surface. The corresponding arrangement is shown. Due to this arrangement of the flanges, a region surrounded by the first flange 106a, the first flange 106b, the third flange 108a, and the third flange 108b is formed on the first diaphragm 104.

The first flange 106a has a flat plate shape and has a first through hole 120 and a plurality of bolt holes 110. When the first flange 106a is viewed in the vertical direction, the first through hole 120 is arranged on the first diaphragm 104 side. That is, the first through hole 120 is arranged in a region between one side where the first flange 106a contacts the first diaphragm 104 and a region where the plurality of bolt holes 110 are provided. The first flange 106b has the same form as the first flange 106a, and is provided with a third through hole 124 in addition to a plurality of bolt holes. On the other hand, the third flanges 108a and 108b are not provided with through holes corresponding to the first through hole 120 and the third through hole 124, but only with the plurality of bolt holes 110.

Attached to the second diaphragm 114 are second flanges 116a, 116b and fourth flanges 118a, 118b. The second flanges 116a and 116b have substantially the same shape, are erected on the second diaphragm 114, and are arranged to face each other at a predetermined interval. The fourth flanges 118a, 118b are erected on the second diaphragm 114, are oriented in a direction that intersects the direction in which the second flanges 116a, 116b are opposed, and are arranged to face each other at a predetermined interval. In FIG. 1A, the second flange 116a is on the 22nd surface, the second flange 116b is on the 24th surface, the fourth flange 118a is on the 21st surface, and the fourth flange 118b is on the 23rd surface. The corresponding arrangement is shown. Due to this arrangement of the flanges, a region surrounded by the second flange 116a, the second flange 116b, the fourth flange 118a, and the fourth flange 118b is formed on the second diaphragm 114.

The second flange 116a has a flat plate shape and has a second through hole 122 and a plurality of bolt holes 110. When the second flange 116a is viewed in the vertical direction, the second through hole 122 is arranged on the second diaphragm 114 side. That is, the second through hole 122 is arranged in a region between one side where the second flange 116a contacts the second diaphragm 114 and the region where the plurality of bolt holes 110 are provided. The second flange 116b has the same form as the second flange 116a, and is provided with a fourth through hole 126 (not shown) in addition to a plurality of bolt holes. On the other hand, the fourth flanges 118a, 118b are not provided with through holes corresponding to the second through hole 122 and the fourth through hole 126, but only with the plurality of bolt holes 110.

There are no limitations on the sizes of the first through hole 120, the second through hole 122, the third through hole 124, and the fourth through hole 126 (not shown). Since these through holes are used as hand holes, they preferably have a hole diameter that allows an operator to insert tools and the like to perform bolt joint construction. There is no limitation on the shape of these through holes, and they may be circular as shown in FIG. 1(A), oval, rectangular, or any polygon. Further, the bolt holes 110 provided in each flange are through-holes that have a diameter through which bolts serving as fasteners can be inserted, and a plurality of bolt holes 110 are provided as appropriate.

The first splints 130a, 130b are disposed on the outside of the first flange 106a, the second flange 116a, the third flange 108a, and the fourth flange 118a, and the second splints 140a, 140b are It is arranged inside the first flange 106a, the second flange 116a, the third flange 108a, and the fourth flange 118a. The first splint plates 130a, 130b and the second splint plates 140a, 140b are provided with bolt holes 111 corresponding to the bolt holes 110 provided on each flange surface.

A fourth flange 118a is arranged at a position corresponding to the first flange 106a, and a third flange 108a is arranged at a position corresponding to the second flange 116a. Similarly, a fourth flange 118b is arranged at a position corresponding to the first flange 106b, and a third flange 108b is arranged at a position corresponding to the second flange 116b.

The first flanges 106a, 106b and the second flanges 116a, 116b are formed to have longer lengths in the material axis direction than the third flanges 108a, 108b and the fourth flanges 118a, 118b. . In other words, in the first flange 106a, the area where the plurality of bolt holes 110 are provided by providing the first through hole 120 is larger than the area where the plurality of bolt holes 110 are provided in the third flange 108a. It is also located in a high place. Further, the second flange 116a has a region where the region where the plurality of bolt holes 110 are provided by providing the second through hole 122 is lower than the region where the plurality of bolt holes 110 are provided in the fourth flange 118a. It is located in This positional relationship also applies to the relationship between the first flange 106b and the third flange 108b and the relationship between the second flange 116b and the fourth flange 118b.

In FIG. 1(B), a first bolted joint 100a and a second bolted joint 100b are formed by vertically arranging and connecting a first steel pipe column 102 and a second steel pipe column 112. (Although not shown, a third bolt joint 100c and a fourth bolt joint 100d are formed on the back side). The first bolt joint 100a is formed by fastening the first flange 106a and the fourth flange 118a between the first splint 130a and the second splint 140a with bolts and nuts. It is formed. In the first bolted joint 100a, the first splint 130a abuts the outer surfaces of the first flange 106a and the fourth flange 118a, and the second splint 140a abuts the outer surfaces of the first flange 106a and the fourth flange 118a. The inner surface of the flange 118a is brought into contact with the inner surface of the flange 118a. Similarly, in the second bolt joint 100b, the second flange 116a and the third flange 108a are sandwiched between the first splint 130b and the second splint 140b and fastened with bolts and nuts. It is formed by The first splint 130b abuts the outer surfaces of the third flange 108 and the second flange 116, and the second splint 140b abuts the inner surfaces of the third flange 108 and the second flange 116. be done.

The first steel pipe column 102 and the second steel pipe column 112 are made of steel material. First diaphragm 104, second diaphragm 114, first flanges 106a, 106b, second flanges 108a, 108b, third flanges 108a, 108b, fourth flanges 118a, 118b, first splint 130a , 130b, and the second splints 140a, 140b are likewise made of steel material. For example, structural rolled steel is used as the steel material. Note that although FIG. 1A shows first splints 130a and 130b placed on the outside and second splints 140a and 140b placed on the inside, sufficient strength of the bolt joint can be maintained. In some cases, the splint that abuts on the inside or outside can also be omitted.

FIG. 2 shows a front view of the joint structure of the steel pipe column according to the present embodiment. FIG. 2 shows a first bolt joint 100a formed on the first surface 11 of the first steel pipe column 102 and the first surface 21 of the second steel pipe column 112, and similarly, the first bolt joint 100a is formed on the first surface 11 of the first steel pipe column 102 and the first surface 21 of the second steel pipe column 112, 22, and a fourth bolt joint 100d is formed on the fourth surface 14 and the fourth surface 24 (although not shown, the third surface 13 and the third surface A third bolt joint 100c is formed at 23). In the first bolt joint 100a, the first splint 130a and the second splint (140a: not shown) abut both the first flange 106a and the fourth flange 118a, and the first It has a size that does not cover the through hole 120. Such a configuration is the same for the second bolted joint 100b, the third bolted joint (100c: not shown), and the fourth bolted joint 100d.

As described with reference to FIGS. 1A and 1B, the region where the bolt holes 110 are formed in the first flange 106a and the region where the bolt holes 110 are formed in the third flange 108a are The heights are different, and the region where the bolt holes 110 are formed in the second flange 116a and the region where the bolt holes 110 are formed in the fourth flange 108a are different in height. Therefore, the heights of the first bolted joint 100a (and the third bolted joint 100c, not shown) are different from those of the second bolted joint 100b and the fourth bolted joint 100d. The first through hole 120 is located below the first bolt joint 100a (same as the third through hole 124, although not shown), and the second through hole 122 is located under the second bolt joint 100a. The fourth through hole 126 is located above the bolt joint.The fourth through hole 126 is located above the fourth bolt joint 100d.

In this way, by making the heights of the bolt joints and through-holes formed on adjacent surfaces different and arranging them in an oblique manner, all the through-holes placed on each side of the steel pipe column are at the same height. By not arranging the steel pipe column vertically, it is possible to increase the resistance against axial force, shear force, and bending stress acting on the steel pipe column.

As shown in FIG. 2, for example, with respect to the first bolt joint 100a, the first through hole 120 is arranged on the lower side, and the second through hole 122 and the fourth through hole 126 are arranged on the adjacent surface. are placed at the same height. In this way, by arranging a plurality of through holes with different heights for one bolt joint, the worker can easily join the first steel pipe column 102 and the second steel pipe column 112. becomes easier. That is, when performing construction, the worker can easily perform the bolt joint work by inserting tools and the like through a plurality of through holes having different heights and directions. For example, when constructing the first bolt joint 100a, the operator inserts tools etc. not only through the first through hole 120 but also through the second through hole 122 and the fourth through hole 126. It can be performed. In this case, the second through hole 122 and the fourth through hole 126 are arranged at different heights and in different directions with respect to the first through hole 120, so that the interior of the steel pipe column can be viewed from various angles. It becomes possible to insert tools, etc., and the degree of freedom of work can be increased.

3(A) shows the cross-sectional structure of the region sandwiched by arrows A1 and A2 in FIG. 2, and FIG. 3(B) shows the cross-sectional structure of the region sandwiched by arrows B1 and B2 in FIG. The cross-sectional structure of is shown.

As shown in FIG. 3A, a first flange 106a and a first flange 106b are arranged to face each other on the surface of the first diaphragm 104, and a third flange 108a and a third flange 108b are arranged to face each other. are arranged so that they are facing each other. Due to this arrangement of the flanges, the first through hole 120 is arranged on the first surface 11 side of the first steel pipe column 102, and the third through hole 124 is arranged on the third surface 13 side. Further, a second bolted joint 100b is formed on the second surface 12 side of the first steel pipe column 102, and a fourth bolted joint 100d is formed on the fourth surface 14 side. Further, as shown in FIG. 3B, a second flange 116a and a second flange 116b are arranged to face each other on the surface of the second diaphragm 114, and a fourth flange 118a and a fourth The flanges 118b are arranged to face each other. Due to this arrangement of the flanges, the second through hole 122 is arranged on the second surface 22 side of the second steel pipe column 112, and the fourth through hole 126 is arranged on the fourth surface 24 side. Further, a first bolted joint 100a is formed on the first surface 21 side of the second steel pipe column 112, and a third bolted joint 100c is formed on the third surface 23.

As shown in FIG. 3A, the second bolt joint 100b has a first splint 130b and a second splint 140b sandwiching the third flange 108a, and bolts 150 are inserted into the bolt holes 110 and 111. is inserted and fastened with a nut 152. The third flange 108a has a bolt hole 110 formed therein so that the cross-sectional area of that portion is smaller than that of other parts, but the first splint 130b and the second splint 140b By providing this, it is possible to compensate for a decrease in cross-sectional area and suppress a decrease in shear strength. The thickness of the first splint 130a and the second splint 140b can be set as appropriate. Such a configuration is the same for the first bolted joint 100a, the third bolted joint 100c, and the fourth bolted joint 100d.

As is clear from FIGS. 3(A) and 3(B), the joint portion between the first steel pipe column 102 and the second steel pipe column 112 has four directions so as to be sandwiched between the bolted joints. A through hole is placed in the hole. In such a joint structure, by making the axial length of the flange without a through hole different from that of the flange with a through hole and joining these two types of flanges with bolts, the flange shown in Fig. 1(B) As shown in FIG. 2, the positions of the through holes and the positions of the bolt connections can be arranged in a diagonal manner. Specifically, on the side of the first steel pipe column 102, first flanges 106a, 106b and third flanges 108a, 108b having different lengths in the material axis direction are provided, and on the side of the second steel pipe column 112, A second flange 116a, 116b and a fourth flange 118a, 118b having different lengths in the material axis direction are provided, and these flanges are arranged so as to mesh with each other to form a bolt joint. The heights of the through hole 120 and the third through hole 124 and the heights of the second through hole 122 and the fourth through hole 126 can be made different. When the flange provided at the joint portion has such a configuration, it is possible to improve the workability of the bolt joint for connecting the first steel pipe column 102 and the second steel pipe column 112.

According to this embodiment, the first through hole 120, the second through hole 122, the third through hole 124, and the fourth through hole 126 are used as hand holes, and the inner side of the joint portion where the flange is arranged. Two steel pipe columns can be joined at the construction site by setting bolts and tightening the bolts. Bolted joints are technically easier than welded joints, and quality can be stabilized by following the procedures. By arranging multiple through-holes that can be used as hand holes in a diagonal manner (with different opening directions), the amount of welding at the construction site is minimized and the workability of bolt connections is improved. Thus, it is possible to obtain a joint structure in which the strength of the joined portion is equal to or greater than that of other portions.

Note that although this embodiment shows a mode in which flanges are arranged corresponding to each surface of a steel pipe column, the arrangement of flanges is not limited to this, and flanges may be arranged so as to bridge two adjacent surfaces. It's okay. For example, in the first steel pipe column 102, the first flange 106a may be arranged so as to span the first surface 11 and the second surface 12. Such arrangement is similar in other embodiments as well.

[Second embodiment]
This embodiment shows a different aspect from the first embodiment in the arrangement of flanges provided with through holes. In the following, parts that are different from the first embodiment will be mainly described.

FIG. 4(A) shows a developed view of the joint portion of the steel pipe column according to this embodiment, and FIG. 4(B) shows a perspective view of the joint portion of the steel pipe column. Note that fasteners such as bolts and nuts are omitted in FIG. 4(A).

As shown in FIG. 4(A), a first flange 106a having a first through hole 120 corresponding to the first surface 11 is provided on the first diaphragm 104, and a first flange 106a having a first through hole 120 corresponding to the second surface 12 is provided on the first diaphragm 104. It has a structure in which a first flange 106b having a second through hole 122 is provided. Although not shown in FIG. 4A, the structure has a structure in which a third flange 108a is provided corresponding to the third surface 13, and a third flange 108b is provided corresponding to the fourth surface 14. . On the other hand, on the second steel pipe column 112 side, a fourth flange 118a is provided corresponding to the first surface 21, and a fourth flange 118b is provided corresponding to the second surface 22. Note that a second flange 116a having a third through hole 124 corresponding to the third surface 23 is provided on the side of the second steel pipe column 112, and a second flange 116a having a third through hole 124 corresponding to the fourth surface 24 is provided. It has a structure in which a second flange 116b having a hole 126 is provided.

That is, in this embodiment, the first flange 106a and the first flange 106b are arranged to correspond to two adjacent surfaces of the first steel pipe column 102, and the second flange 116a and the second flanges 116b are arranged so as to correspond to two adjacent surfaces of the second steel pipe column 112. The first flange 106a and the first flange 106b and the second flange 116a and the second flange 116b are arranged so as not to vertically overlap in series.

In other words, the first flange 106a and the first flange 106b, and the second flange 116a and the second flange 116b are arranged to form an L-shape, respectively. Then, as shown in FIG. 4(B), when connecting the first steel pipe column 102 and the second steel pipe column 112, these two L-shaped structures are arranged so as to interlock with each other. As a result, the first bolt joint 100a and the second bolt joint 100b are arranged at the same height on the side of the first surface 11 and the first surface 21, and on the side of the second surface 12 and the second surface 22. The first through hole 120 and the second through hole 122 are arranged below these bolted joints. Although not shown in FIG. 4B, the second flange 116a and the second flange 116b provide a , a structure is formed in which the arrangement of bolt joints and through holes is reversed from the illustrated front side.

FIG. 5 shows a front view of the joint structure of the steel pipe column according to the present embodiment. A first bolted joint 100a is formed on the first surface 11 and first surface 21 side of the steel pipe column, a second bolted joint 100b is formed on the second surface 12 and second surface 22 side, and the second bolted joint 100b is formed on the second surface 12 and second surface 22 side. A fourth bolt joint 100d is formed on the side of the fourth surface 14 and the fourth surface 24 (although not shown, a third bolt joint 100c is formed on the side of the third surface 13 and the third surface 23). ).

As shown in FIG. 5, the first through hole 120 and the second through hole 122 are arranged at the same height on two adjacent surfaces. In other words, the first through hole 120 is arranged below the first bolt joint 100a, and the second through hole 122 is arranged below the second bolt joint 100b. Although not clearly shown in FIG. 5, the fourth through hole 126 is arranged at the same height as the third through hole 124, which is not shown. The fourth through hole 126 is arranged above the fourth bolted joint 100d.

6(A) shows the cross-sectional structure of the region sandwiched by arrows A3 and A4 in FIG. 5, and FIG. 6(B) shows the cross-sectional structure of the region sandwiched by arrows B2 and B4 in FIG. The cross-sectional structure of is shown.

As shown in FIG. 6(A), a first flange 106a and a first flange 106b are arranged in an L-shape on the surface of the first diaphragm 104, and a third flange 108a and a third flange 108b are arranged in an L-shape. are arranged in an inverted L shape. Due to this arrangement of the flanges, the first through hole 120 is arranged on the first surface 11 side of the first steel pipe column 102, and the second through hole 122 is arranged on the second surface 12 side at the same height. Ru. Further, a third bolted joint 100c is formed on the third surface 13 side of the first steel pipe column 102, and a fourth bolted joint 100d is formed at the same height on the fourth surface 14 side. Further, as shown in FIG. 6(B), a second flange 116a and a second flange 116b are arranged in an inverted L shape on the surface of the second diaphragm 114, and a fourth flange 118a and a second flange 116b are arranged in an inverted L shape. 4 flanges 118b are arranged in an L-shape. Due to this arrangement of the flanges, the third through hole 124 is arranged on the third surface 23 side of the second steel pipe column 112, and the fourth through hole 126 is arranged on the fourth surface 24 side at the same height. Ru. Further, a first bolt joint 100a is formed on the first surface 21 side of the second steel pipe column 112, and a second bolt joint 100b is formed on the second surface 22 at the same height. As shown in FIGS. 6A and 6B, in cross-sectional view, through holes are arranged on each of the four faces of the steel pipe column, and bolted joints are formed.

In this way, the joint structure of the steel pipe column according to the present embodiment is provided with through holes having the same height on two adjacent surfaces, and with the same height on the other two adjacent surfaces opposite to these two adjacent surfaces. The through hole has a structure in which the height of the through hole is different between two adjacent surfaces and two other adjacent surfaces. According to this arrangement of the through holes, it is possible to improve workability when performing bolt joints using both arms, for example. By arranging such a set of through-holes diagonally at different heights, it is possible to improve workability when forming bolted joints on each side, and to improve welding at the construction site. It is possible to reduce the amount as much as possible, improve the workability of bolt joints, and obtain a joint structure in which the strength of the joint part is equal to or higher than that of other parts. Further, since all the through holes arranged on each surface of the steel pipe column are not arranged at the same height, it is possible to suppress a decrease in the strength of the joint portion.

[Third embodiment]
This embodiment shows a different aspect from the first embodiment and the second embodiment in the configuration of the flange provided with the through hole. In the following, parts that are different from the first embodiment will be mainly described.

FIG. 7(A) shows a developed view of the joint portion of the steel pipe column according to this embodiment, and FIG. 7(B) and FIG. 8 show perspective views of the joint portion of the steel pipe column. Further, cross-sectional structures corresponding to lines D1 and D2 shown in FIGS. 7(B) and 8 are shown in FIGS. 9(A) and 9(B), respectively. Note that fasteners such as bolts and nuts are omitted in FIG. 7(A).

As shown in FIG. 7(A), a first flange 106a is provided on the side of the first steel pipe column 102 corresponding to the first surface 11, and a first flange 106a is provided on the side of the first steel pipe column 102, and The first flange 106a, on which the third flange 108a, 108b, 108c is correspondingly provided, is provided with a first through hole 120, and the third flange 108a, 108b, 108c is provided with only a bolt hole 110. , a through hole forming a hand hole is not provided. A fourth flange 118a is provided on the second steel pipe column 112 side, corresponding to the 21st surface, and second flanges 116a, 116b, corresponding to the 22nd, 23rd, and 24th surfaces. 116c is provided. The second flange 116a is provided with a second through hole 122, the second flange 116b is provided with a third through hole 124, and the second flange 116c is provided with a fourth through hole 124 (not shown). 126 are provided. The fourth flange 118a is provided with only bolt holes 110, and is not provided with through holes that form hand holes.

FIG. 7(B) shows a state in which the first steel pipe column 102 and the second steel pipe column 112 having such an arrangement are connected by bolt connection. FIG. 7(B) is a perspective view of the first surface 11 and second surface 12 of the first steel pipe column 102 and the first surface 21 and second surface 22 of the second steel pipe column 112. On the other hand, FIG. 8 shows a perspective view of the third surface 13 and fourth surface 14 of the first steel pipe column 102 and the third surface 23 and fourth surface 24 of the second steel pipe column 112.

As shown in FIGS. 7(B) and 8, the first through hole 120 is arranged on the side closer to the first steel pipe column 102, whereas the second through hole 122 and the third through hole 124 and the fourth through hole 126 are arranged on the side closer to the second steel pipe column 112. Thus, in this embodiment, the second through hole 122, the third through hole 124, and the fourth through hole 126 are arranged at different heights with respect to the first through hole 120. In other words, the sets of the second through hole 122, the third through hole 124, and the fourth through hole 126 are arranged diagonally with respect to the first through hole 120.

As shown in FIG. 9A, the first diaphragm 104 side has a first through hole 120, a second bolt joint 100b, a third bolt joint 100c, and a fourth bolt joint. 100d are arranged. On the other hand, as shown in FIG. 9(B), on the second diaphragm 114 side, there are a second through hole 122, a third through hole 124, a fourth through hole 126, and a first bolt joint. 100a are arranged. In this way, this embodiment has a structure in which the through holes provided on three surfaces have the same height, and the heights of the through holes provided on the other surface are different. By arranging the three through holes at the same height as in this embodiment, even when multiple people are working on construction, they can work simultaneously without interfering with each other. In this case, by making the height of at least one through hole different, tools etc. can be inserted from different angles, and the workability of bolt joining can be improved. With respect to the first through hole 120, the second through hole 122, the third through hole 124, and the fourth through hole 126 are arranged in a diagonal manner, thereby forming a bolt joint on each surface. This reduces the amount of welding required at the construction site as much as possible, improves the workability of bolted joints, and creates a joint structure in which the strength of the joint is equal to or greater than that of other parts. Obtainable. Further, since all the through holes arranged on each surface of the steel pipe column are not arranged at the same height, it is possible to suppress a decrease in the strength of the joint portion.

Note that in this embodiment, a first through hole 120 is provided on the first steel pipe column 102 side, and a second through hole 122, a third through hole 124, and a third through hole 124 are provided on the second steel pipe column 112 side. Although a structure is shown in which four through holes 126 are provided, similar effects can be obtained even if the arrangement of such through holes is reversed vertically.

[Fourth embodiment]
This embodiment shows an example in which a reinforcing plate is further provided in the steel pipe column joint structure shown in the first embodiment. In the following, parts that are different from the first embodiment will be mainly described.

FIG. 10(A) shows a developed view of a joint portion in a joint structure for a steel pipe column according to this embodiment, and FIG. 10(B) shows a perspective view of the joint structure for a steel pipe column according to this embodiment. Note that fastening members such as bolts and nuts are omitted in FIG. 10(A).

As shown in FIGS. 10A and 10B, a first reinforcing plate 144a (also called a web) is provided in an area surrounded by first flanges 106a, 106b and third flanges 108a, 108b. . The first reinforcing plate 144a is erected in a direction parallel to the material axis direction of the first steel pipe column 102, and is provided so as to be in contact with at least the inside of the first flange 106a and the first flange 106b. Further, the first reinforcing plate 144a may have a cross-shaped shape in a plan view so as to be inscribed with the third flange 108a and the third flange 108b. Also on the side of the second steel pipe column 112, a second reinforcing plate 144b having a similar structure is provided.

Note that by providing the first reinforcing plate 144a and the second reinforcing plate 144b, the second splints 140a and 140b interfere with the reinforcing plate. Therefore, this embodiment has a structure in which the second splints 140a and 140b are divided into two so that they do not overlap with the reinforcing plate.

FIG. 11 shows a front view of the joint structure of the steel pipe column according to the present embodiment. A first reinforcing plate 144a is provided on the side of the first steel pipe column 102 at the same height as a portion where the first through hole 120 (and the third through hole 124, not shown) is provided. Further, a second reinforcing plate 144b is provided on the side of the second steel pipe column 112 at the same height as a portion where the second through hole 122 and the fourth through hole 126 are provided.

The first reinforcing plate 144a is arranged such that one end abuts the position where the first through hole 120 of the first flange 106a is provided (the same applies to the first flange 106a not shown). ). Further, when the first reinforcing plate 144a has a cross-shaped shape, it is provided so as to also come into contact with the third flanges 108a and 108b. The second reinforcing plate 144b has one end in contact with the second through hole 122 of the second flange 116a, and the other end in contact with the fourth through hole 122 of the second flange 116b. is provided so as to be in contact with the position where it is provided. Further, when the second reinforcing plate 144b has a cross shape, it is provided so as to also come into contact with the fourth flanges 118a and 118b. The first reinforcing plate 144a and the second reinforcing plate 144b are fixed by welding to their abutting flanges.

In this way, by providing the first reinforcing plate 144a so as to span the positions where the through holes of the first flanges 106a and 106b are provided, the strength of that part can be increased. That is, the strength of the portions of the first flanges 106a and 106b where the first through hole 120 and the third through hole 124 are provided can be supplemented. Similarly, by providing the second reinforcing plate 144b across the positions where the through holes of the second flanges 116a and 116b are provided, the strength of that part can be increased.

The first reinforcing plate 144a may be provided with a notch 146a at a position overlapping the first through hole 120 (and the third through hole 124, not shown), and the second reinforcing plate 144b may be provided with a notch 146a at a position overlapping with the first through hole 120 (and the third through hole 124, not shown). A notch 146b may be provided at a position overlapping the second through hole 122 and the fourth through hole 126. Although the shape of the notches 146a and 146b is arbitrary, they may have, for example, a semicircular shape having approximately the same diameter as the respective through holes. By providing the notches 146a and 146b in the first reinforcing plate 144a and the second reinforcing plate 144b, it is possible to prevent part of each through hole from being blocked. Thereby, even when working by inserting a tool or the like through each through hole, the reinforcing plate does not get in the way and workability can be prevented from deteriorating.

12(A) shows the cross-sectional structure of the region sandwiched by arrows A5 and A6 in FIG. 11 when viewed in cross section, and FIG. 12(B) shows the cross-sectional structure of the region sandwiched by arrows B5 and B6 in FIG. 10 when viewed in cross section. The cross-sectional structure of is shown.

As shown in FIG. 12(A), a first reinforcing plate 144a is provided to bridge the inner side surface of the first flange 106a and the first flange 106b. In addition, when the first reinforcing plate 144a has a cross-shaped shape in plan view as shown in the figure, the first reinforcing plate 144a spans the inner side surface of the third flange 108a and the third flange 108b. A reinforcing plate 144a is provided. The first reinforcing plate 144a is provided at a position overlapping the first through hole 120 and the third through hole 124. A notch 146a is provided at the end of the first reinforcing plate 144a so as not to partially block the through hole. A second reinforcing plate 144b shown in FIG. 12(B) also has a similar configuration, and a second notch 146b is provided at an end overlapping with the second through hole 122 and the fourth through hole 126.

As shown in FIGS. 12(A) and 12(B), by providing a reinforcing plate in the area where the flange is provided, the strength of that area can be increased. In particular, when a through hole is provided in the flange, by providing a reinforcing plate, it is possible to compensate for the decrease in strength (rigidity) caused by providing the through hole. The other configurations of the steel pipe column according to this embodiment are the same as those according to the first embodiment, and the same effects can be achieved. Note that this embodiment can be implemented in appropriate combination with the configurations of the second and third embodiments.

[Fifth embodiment]
This embodiment shows a configuration in which a splint plate is further provided to connect the reinforcing plates to each other in the configuration of the reinforcing plates shown in the fourth embodiment. In the following, parts that are different from the fourth embodiment will be mainly described.

FIG. 13(A) shows a developed view of a joint portion in a joint structure for a steel pipe column according to this embodiment, and FIG. 13(B) shows a perspective view of the joint structure for a steel pipe column according to this embodiment. Note that fastening members such as bolts and nuts are omitted in FIG. 13(A).

As shown in FIG. 13(A), the third splint 132 and the fourth splint 142 are arranged in accordance with the positions of the first auxiliary plate 144a and the second auxiliary plate 144b. With respect to the first auxiliary plate 144a and the second auxiliary plate 144b, the third splint 132 is arranged on one side, and the fourth splint 142 is arranged on the other side. The first reinforcing plate 144a and the second reinforcing plate 144b, and the third splinting plate 132 and the fourth splinting plate 142 are provided with bolt holes for bolt connection. The third splint 132 and the fourth splint 142 have a length spanning both the first reinforcing plate 144a and the second reinforcing plate 144b. FIG. 13(B) shows a state in which the first steel pipe column 102 and the second steel pipe column 112 are connected by bolt connection. Since the third splint 132 and the fourth splint 142 are arranged inside the flanges, they have a structure that is visible from the through-hole but otherwise invisible.

Cross-sectional structures corresponding to lines D3 and D4 shown in FIG. 130(B) are shown in FIGS. 14(A) and (B), respectively. 14(A) shows the structure on the first steel pipe column 102 side, and FIG. 14(B) shows the structure on the second steel pipe column 112 side. The first reinforcing plate 144a and the second reinforcing plate 144b are sandwiched between the third splinting plate 132 and the fourth splinting plate 142 and bolted. When the first reinforcing plate 144a and the second reinforcing plate 144b have a cross shape in plan view, a splint plate can be provided corresponding to each surface and fixed by bolting.

As shown in this embodiment, the strength of the joint structure of steel pipe columns can be increased by applying splints to reinforcing plates arranged above and below and fixing them with fasteners such as bolts and nuts. In this case, by providing a through hole in the flange surrounding the reinforcing plate, it is possible to easily connect the reinforcing plate with the splint.

[Sixth embodiment]
This embodiment shows an aspect in which the configuration of the flange is different from the first embodiment. In the following, parts that are different from the first embodiment will be mainly described.

FIG. 15(A) shows a developed view of the joint portion of the steel pipe column according to this embodiment, and FIG. 15(B) shows a perspective view of the joint portion of the steel pipe column. Further, cross-sectional structures corresponding to lines D5 and D6 shown in FIG. 15(B) are shown in FIGS. 16(A) and 16(B), respectively. Note that fasteners such as bolts and nuts are omitted in FIG. 15(A). The following description will be made with reference to FIGS. 15(A) and (B) and FIGS. 16(A) and (B).

In this embodiment, the first flange 106a in which the first through hole 120 is provided has a thickness greater than the wall thickness of the first steel pipe column 102, and the second flange 106a in which the second through hole 122 is provided has a thickness greater than that of the first steel pipe column 102 The flange 116a has a thickness greater than the wall thickness of the second steel pipe column 112. In this way, by making the plate thickness of the flange where the through hole is provided larger than the wall thickness of the steel pipe column, the shear force, bending stress, and axial stress caused by the through hole and bolt hole are reduced. This can compensate for the decrease in strength (rigidity).

Note that the thickness of the third flange 108a is relatively thinner than that of the second flange 116a. When the second flange 116a and the third flange 108a are sandwiched between the first splint 130b and the second splint 140b, a spacer is provided on the back surface of the third flange 108a to prevent a gap from forming due to the difference in plate thickness. 134b is provided. The spacer 134b has a thickness comparable to the difference in plate thickness between the second flange 116a and the third flange 108a, is provided with a bolt hole, and is provided with a bolt hole between the third flange 108a and the fourth splint. 140b so that no gap is created between the two bolts. As shown in FIGS. 16A and 16B, spacers are provided at each bolt joint (spacer 134a at the first bolt joint 100a, spacer 134b at the second bolt joint 100b, spacer 134b at the third bolt joint 100a, spacer 134b at the second bolt joint 100b, A spacer 134c is arranged at the joint 100c, and a spacer 134d is arranged at the fourth bolt joint 100d).

Note that for the third flange 108 and the fourth flange 118, which are not provided with through holes, the strength against shearing stress, bending stress, and axial stress due to the provision of bolt holes is similarly increased by increasing the plate thickness ( stiffness) can be compensated for.

The joint structure of the steel pipe column according to this embodiment is the same as that of the first embodiment except that the thickness of the flange is increased. Therefore, in addition to the above effects, advantageous effects similar to those of the first embodiment can be obtained. Note that this embodiment can be implemented in combination with the second to fifth embodiments as appropriate.

[Seventh embodiment]
This embodiment shows an aspect in which the configuration of the diaphragm is different from the first embodiment. In the following, parts that are different from the first embodiment will be mainly described.

FIGS. 17A and 17B are drawings corresponding to FIGS. 3A and 3B, and show the cross-sectional structure of a bolted joint of a square steel pipe column. In this embodiment, the first diaphragm 104 is provided with a through hole 148a, and the second diaphragm 114 is provided with a through hole 148b. The size and shape in plan view of the through hole 148a and the through hole 148b are arbitrary. In this way, by providing through holes in one or both of the first diaphragm 104 and the second diaphragm 114, the weight can be reduced while maintaining the strength of the joint portion.

Further, the square steel pipe column shown in this embodiment can be applied to a concrete filled steel tube structure (also referred to as a concrete filled steel tube, CFT). Concrete is filled inside the first steel pipe column 102 and the second steel pipe column 112 that are connected together through the through holes 148a and 148b. As a result, a strong structure can be formed even if the cross-sectional area of the first steel pipe column 102 and the second steel pipe column 112 is reduced.

The joint structure of the steel pipe column according to this embodiment is the same as that of the first embodiment except for the structure of the diaphragm. Therefore, in addition to the above effects, advantageous effects similar to those of the first embodiment can be obtained. Note that this embodiment can be implemented in combination with the second to sixth embodiments as appropriate.

DESCRIPTION OF SYMBOLS 100... Bolt joint part, 102... First steel pipe column, 104... First diaphragm, 106... First flange, 108... Third flange, 112... Third flange 2 steel pipe column, 114... second diaphragm, 116... second flange, 118... fourth flange, 110... bolt hole, 111... bolt hole, 120... First through hole, 122... second through hole, 124... third through hole, 126... fourth through hole, 130... first splint, 132... Third splint, 134... Spacer, 140... Second splint, 142... Fourth splint, 144... Reinforcement plate, 146... Notch, 148...・Through hole, 150... Bolt, 152... Nut

Claims (13)

a first diaphragm provided at one end of the first steel pipe column;
a first flange fixed to the first diaphragm, arranged parallel to the material axis direction of the first steel pipe column, and having a first through hole used as a hand hole;
a second diaphragm provided at one end of the second steel pipe column;
a second flange fixed to the second diaphragm, arranged parallel to the material axis direction of the second steel pipe column, and having a second through hole used as a hand hole;
a third flange fixed to the first diaphragm, arranged parallel to the material axis direction of the first steel pipe column, and adjacent to the first flange;
a fourth flange fixed to the second diaphragm, arranged parallel to the material axis direction of the second steel pipe column, and adjacent to the second flange;
a first splint, and a second splint;
including;
the first steel pipe column and the second steel pipe column are arranged in a vertical direction,
the first flange and the fourth flange, and the second flange and the third flange are juxtaposed in the material axis direction,
the first flange and the fourth flange are bolted together with the first splint;
the second flange and the third flange are bolted together with the second splint;
A joint structure for a steel pipe column, in which the first through hole and the second through hole are arranged in an oblique manner. The first flange is longer than the third flange in the material axis direction, and the first through hole is provided on the first diaphragm side,
The steel pipe column joint structure according to claim 1, wherein the second flange is longer than the fourth flange in the material axis direction, and the second through hole is provided on the second diaphragm side. . The first flange has a first region provided with a plurality of bolt holes,
The second flange has a second region provided with a plurality of bolt holes,
The first through hole is provided between one end of the first flange on the first diaphragm side and the first region,
The joint structure for a steel pipe column according to claim 1, wherein the second through hole is provided between one end of the second flange on the second diaphragm side and the second region. The third flange has a third region provided with a plurality of bolt holes,
The fourth flange has a fourth region provided with a plurality of bolt holes,
the first splint is in contact with the first region and the fourth region,
The joint structure for a steel pipe column according to claim 3, wherein the second splint is in contact with the second region and the third region. The first through hole and the second through hole have different heights in the material axis direction of the first steel pipe column and the second steel pipe column,
A joint structure for a steel pipe column according to any one of claims 1 to 4. a first reinforcing plate provided on the first diaphragm and welded to the first flange;
The joint structure for a steel pipe column according to any one of claims 1 to 5, further comprising a second reinforcing plate provided on the second diaphragm and welded to the second flange. The first reinforcing plate is arranged such that one end intersects with the first through hole, and a first notch is provided in a portion overlapping with the first through hole,
7. The second reinforcing plate is arranged such that one end intersects the second through hole, and a second notch is provided in a portion overlapping with the second through hole. joint structure of steel pipe columns. Any one of claims 1 to 7, wherein the first flange is thicker than the first steel pipe column, and the second flange is thicker than the second steel pipe column. Joint structure of steel pipe columns described in . The joint structure for a steel pipe column according to any one of claims 1 to 8, wherein a through hole is provided in one or both of the first diaphragm and the second diaphragm. The first steel pipe column and the second steel pipe column are square steel pipe columns, and the square steel pipe column has a first surface to a fourth surface,
The first flange is provided corresponding to a first surface of the first steel pipe column and a third surface opposite to the first surface, and the first flange is provided corresponding to a second surface of the first steel pipe column and a third surface opposite to the second surface. the third flange is provided corresponding to the fourth surface;
The fourth flange is provided corresponding to the first surface of the second steel pipe column and a third surface opposite to the first surface, and the fourth flange is provided opposite to the second surface and the second surface of the second steel pipe column. The joint structure for a steel pipe column according to any one of claims 1 to 9, wherein the second flange is provided corresponding to the fourth surface. The first steel pipe column and the second steel pipe column are square steel pipe columns, and the square steel pipe column has a first surface to a fourth surface,
The first flange is provided corresponding to a first surface of the first steel pipe column and a second surface adjacent to the first surface, and the first flange is provided corresponding to a third surface of the first steel pipe column and a second surface adjacent to the third surface. the third flange is provided corresponding to the fourth surface;
The fourth flange is provided corresponding to a first surface of the second steel pipe column and a second surface adjacent to the first surface, and the fourth flange is provided corresponding to a third surface of the second steel pipe column and a second surface adjacent to the third surface. The joint structure for a steel pipe column according to any one of claims 1 to 9, wherein the second flange is provided corresponding to the fourth surface. The first steel pipe column and the second steel pipe column are square steel pipe columns, and the square steel pipe column has a first surface to a fourth surface,
The first flange is provided corresponding to a first surface of the first steel pipe column, a second surface of the first steel pipe column, a third surface adjacent to the second surface, and a third surface adjacent to the third surface. the third flange is provided corresponding to the fourth surface,
The fourth flange is provided corresponding to the first surface of the second steel pipe column, the second surface of the second steel pipe column, the third surface adjacent to the second surface, and the fourth flange adjacent to the third surface. The joint structure for a steel pipe column according to any one of claims 1 to 9, wherein the second flange is provided corresponding to the fourth surface. The first steel pipe column and the second steel pipe column are square steel pipe columns, and the square steel pipe column has a first surface to a fourth surface,
The first flange is provided corresponding to a first surface, a second surface adjacent to the first surface, and a third surface adjacent to the second surface of the first steel pipe column, and the third flange is provided corresponding to the fourth surface of the
The fourth flange is provided corresponding to a first surface, a second surface adjacent to the first surface, and a third surface adjacent to the second surface of the second steel pipe column, and the second steel pipe column The joint structure for a steel pipe column according to any one of claims 1 to 9, wherein the second flange is provided corresponding to the second surface of the pipe.