JP2020133354A - Joint structure of square steel pipe column - Google Patents

Abstract

To provide a joint structure of a square steel pipe column which facilitates bolt joining.SOLUTION: A joint structure of a square steel pipe column includes: a first flange including a first bolt hole provided on one end of a first square steel pipe column; a first notch part provided on a square part of the first square steel pipe column adjacent to the first flange; a second flange including a second bolt hole provided on one end of a second square steel pipe column; a second notch part provided on a square part of the second square steel pipe column adjacent to the second flange; and a first splice plate which is brought into contact with one surface of the first flange and the second flange, has a third bolt hole provided at a position corresponding to the first bolt hole and has a fourth bolt hole provided at a position corresponding to the second bolt hole. In a state where one end of the first square steel pipe column and one end of the second square steel pipe column are abutted to each other, an opening is formed of the first notch part and the second notch part, and bolts are joined using the first flange, the second flange and the first splice plate.SELECTED DRAWING: Figure 1

Description

One embodiment of the present invention relates to a joint structure of a square steel pipe column used in a building.

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

Japanese Unexamined Patent Publication No. 5-179702 (Patent No. 312209) Japanese Unexamined Patent Publication No. 2004-293196 (Patent No. 4038449)

When bolting steel members, any member having an open cross-sectional shape such as H-shaped steel can be easily bolted. However, in the case of a closed cross section such as a square steel pipe column, there is a problem that bolt joining cannot be easily performed.

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

The joint structure of the square steel pipe column according to the embodiment of the present invention includes a first flange including a first bolt hole provided at one end of the first square steel pipe column, and a first flange adjacent to the first flange. Adjacent to the second flange, the first notch provided at the corner of the square steel tube column, the second flange including the second bolt hole provided at one end of the second square steel tube column, and the second flange. The second notch provided at the corner of the second square steel pipe column is in contact with one surface of each of the first flange and the second flange, and is located at a position corresponding to the first bolt hole. It has a first flange plate provided with a third bolt hole and a fourth bolt hole at a position corresponding to the second bolt hole. With one end of the first square steel pipe column and one end of the second square steel pipe column abutting against each other, an opening is formed by the first notch and the second notch, and the first square shape is formed. The steel pipe column and the second square steel pipe column are bolted together using a first flange, a second flange, and a first attachment plate.

The joint structure of the square steel pipe column according to the embodiment of the present invention corresponds to each side surface of the first diaphragm and the first square steel pipe column that closes one end of the first square steel pipe column, and has a gap at each corner portion. A plurality of first flanges each including a first bolt hole, a second diaphragm that closes one end of a second square steel pipe column, and each side surface of the second square steel pipe column. A plurality of second flanges each containing a second bolt hole, which are arranged so as to form a gap at each corner, and are in contact with one surface of each of the first flange and the second flange. It has a first attachment plate in which a third bolt hole is provided at a position corresponding to the first bolt hole and a fourth bolt hole is provided at a position corresponding to the second bolt hole. A plurality of first flanges are arranged so that one end of the first square steel pipe column and one end of the second square steel pipe column face each other, and one end of the first flange and one end of the second flange are abutted against each other. And the plurality of second flanges form a plurality of openings corresponding to the corners of the first square steel pipe column and the second square steel pipe column, and form the first square steel pipe pillar and the second square steel pipe. The pillars are bolted together using a first flange, a second flange, and a first attachment plate.

The joint structure of a square steel pipe column according to an embodiment of the present invention has a first flange provided with a first bolt hole at at least one end, and a region other than the first flange projects. A region of the second flange having a first square steel tube column provided with a first notch and a second flange provided with a second bolt hole at at least one end. A third bolt hole at a position corresponding to the first bolt hole, in contact with the first flange and the second flange, and the second square steel pipe column provided with the second notch so as to project. Is provided, and has a first flange plate provided with a fourth bolt hole at a position corresponding to the second bolt hole. The first square steel pipe column and the second square steel pipe column are the first flange, the second flange, and the first flange in a state where the first notch and the second notch are in mesh with each other. It is bolted by a plate.

According to the joint structure of the square steel pipe according to the embodiment of the present invention, the bolt joint of the square steel pipe column is facilitated, and sufficient bending rigidity and bending strength can be ensured.

A perspective view of a square steel pipe column according to an embodiment of the present invention is shown, (A) shows a developed view, and (B) shows a joint portion of two steel pipe columns. The cross-sectional structure at the joint of the square steel pipe columns shown in FIG. 1 is shown. A perspective view of a square steel pipe column according to an embodiment of the present invention is shown, (A) shows a developed view, and (B) shows a joint portion of two steel pipe columns. The cross-sectional structure at the joint of the square steel pipe columns shown in FIG. 3 is shown. A perspective view of a square steel pipe column according to an embodiment of the present invention is shown, (A) shows a developed view, and (B) shows a joint portion of two steel pipe columns. The cross-sectional structure at the joint portion of the square steel pipe column shown in FIG. 5 is shown. A perspective view of a square steel pipe column according to an embodiment of the present invention is shown, (A) shows a developed view, and (B) shows a joint portion of two steel pipe columns. The cross-sectional structure at the joint portion of the square steel pipe column shown in FIG. 7 is shown. A modified example of the joint structure of the square steel pipe column shown in FIG. 8 is shown. A perspective view of a square steel pipe column according to an embodiment of the present invention is shown, (A) shows a developed view, and (B) shows a joint portion of two steel pipe columns. The cross-sectional structure at the joint portion of the square steel pipe column shown in FIG. 10 is shown. A perspective view of a square steel pipe column according to an embodiment of the present invention is shown, (A) shows a developed view, and (B) shows a joint portion of two steel pipe columns. The cross-sectional structure at the joint portion of the square steel pipe column shown in FIG. 12 is shown. A perspective view of a square steel pipe column according to an embodiment of the present invention is shown, (A) shows a developed view, and (B) shows a joint portion of two steel pipe columns. The cross-sectional structure at the joint of the square steel pipe columns shown in FIG. 14 is shown, (A) shows the cross-sectional structure of the joint of the first square steel pipe column, and (B) shows the cross-sectional structure of the joint of the second square steel pipe column. Shown. A perspective view of a square steel pipe column according to an embodiment of the present invention is shown, (A) shows a developed view, and (B) shows a joint portion of two steel pipe columns. The cross-sectional structure at the joint of the square steel pipe columns shown in FIG. 16 is shown, (A) shows the cross-sectional structure of the joint of the first square steel pipe column, and (B) shows the cross-sectional structure of the joint of the second square steel pipe column. Shown. A perspective view of a square steel pipe column according to an embodiment of the present invention is shown, (A) shows a developed view, and (B) shows a joint portion of two steel pipe columns. The cross-sectional structure at the joint of the square steel pipe columns shown in FIG. 18 is shown, (A) shows the cross-sectional structure of the joint of the first square steel pipe column, and (B) shows the cross-sectional structure of the joint of the second square steel pipe column. Shown.

Hereinafter, the contents of the embodiment of the present invention will be described with reference to the drawings and the like. However, the present invention includes many different aspects and is not construed as being limited to the contents of the embodiments exemplified below. In order to clarify the description, the drawings may schematically represent the width, thickness, shape, etc. of each part as compared with the actual embodiment, but this is merely an example and limits the content of the present invention. It is not something to do. Further, in the present specification, when a certain element described in a certain drawing and a certain element described in another drawing have the same or corresponding relationship, the same code (or the number described as the code) is used. A reference numeral (a, b, etc.) may be added later, and the repeated description may be omitted as appropriate. Furthermore, the letters "1st" and "2nd" for each element are convenient signs used to distinguish each element, and have no further meaning unless otherwise specified. ..

[First Embodiment]
The outline of the joint structure of the square steel pipe column according to the embodiment of the present invention will be described with reference to FIGS. 1 (A) and 1 (B). FIG. 1A shows a developed view of a joint portion of a square steel pipe column, and FIG. 1B shows a perspective view of a joint portion of a square steel pipe column. In addition, in FIG. 1A, fastening members such as bolts and nuts are omitted.

As shown in FIG. 1A, a first flange 104 is provided at one end of the first square steel pipe column 102. The first flange 104 is formed of the same member continuous from the first square steel pipe column 102. Therefore, the first flange 104 has the same thickness as the thickness of the first square steel pipe column 102. The first flange 104 includes a first bolt hole 106 through which a bolt is inserted. The first bolt hole 106 is a hole having a diameter through which a bolt can be inserted and penetrating the first flange 104. A plurality of such first bolt holes 106 are provided in the plane of the first flange 104. The cross-sectional shape of the first square steel pipe column 102 is arbitrary. 1A and 1B show a case where the first square steel pipe column 102 is rectangular. In this case, the first flange 104 is provided corresponding to each side surface of the first square steel pipe column 102. For example, four first flanges 104 are provided corresponding to the four side surfaces of the first square steel pipe column 102.

The first square steel pipe column 102 is provided with a first notched portion 108 at a corner portion adjacent to the first flange 104. As shown in FIG. 1 (A), the first notch 108 is formed so as to divide two adjacent first flanges 104. The first notch 108 is 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. It is required to be provided in the section.

The second square steel pipe column 112 has the same shape as the first square steel pipe column 102. That is, the second square steel pipe column 112 is provided with a second flange 114 having a second bolt hole 116 formed at one end thereof, and a second notched portion 118 is provided adjacent to the second flange 114. Be done.

The first flange 104 and the second flange 114 are each square steel pipe column so 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. It is provided at the same cross-sectional position of the above with substantially the same width. Further, the first cutout portion 108 and the second notch portion 118 face 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. It is provided in the section.

FIG. 1A also shows a first attachment plate 130 and a second attachment plate 140. For example, the first attachment plate 130 is arranged outside the first square steel pipe column 102 and the second square steel pipe column 112, and the second attachment plate 140 is the first square steel pipe column 102 and the second. It is arranged inside the square steel pipe column 112. The first flange 104 and the second flange 114, as well as the first attachment plate 130 and the second attachment plate 140 are made of steel material. For example, the members may be formed of the same material as the square steel pipe column. The thickness of the first attachment plate 130 and the second attachment plate 140 may have substantially the same thickness as that of the first flange 104, or from the first flange 104 in order to increase the strength of the joint portion 100. The thickness may be large. Further, if the total thickness of the first attachment plate 130 and the second attachment plate 140 is equal to or greater than the thickness of the first flange 104, the first attachment plate 130 and the second attachment plate 140 are respectively. The thickness may be thinner than that of the first flange 104. As a result, even if the column is damaged by the seismic force, it is possible to fully exert the plastic deformation ability of the first square steel pipe column 102. The first attachment plate 130 is provided with a third bolt hole 132 at a position corresponding to the first bolt hole 106, and has a fourth bolt hole 134 at a position corresponding to the second bolt hole 116. 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, the first attachment plate 130 and the second attachment plate 140 have a first flange 104 and a second flange. It has a size capable of covering both of 114. The first attachment plate 130 and the second attachment plate 140 may be provided so as to connect the first flange 104 and the second flange 114, and may be divided into a plurality of parts. For example, one or both of the first attachment plate 130 and the second attachment plate 140 may be divided into two or more members in the longitudinal direction. Further, one of the first attachment plate 130 and the second attachment plate 140 may be omitted. For example, if only one of the first attachment plate 130 and the second attachment plate 140 can sufficiently secure the joint strength, the other attachment plate may be omitted.

FIG. 1B shows a state in which the first square steel pipe column 102 and the second square steel pipe column 112 are bolted together. In the joint portion 100, the first attachment plate 130 and the second attachment plate 140 sandwich the first flange 104 and the second flange 114, and sandwich the first bolt hole 106, the third bolt hole 132, and the third bolt hole 132. The fifth bolt hole 142 communicates with the second bolt hole 132, the fourth bolt hole 134, and the sixth bolt hole 144 communicate with each other. Then, bolts are inserted into these bolt holes that communicate with each other and fastened with nuts.

FIG. 2 shows the cross-sectional structure of the joint portion 100 when the portion indicated by the arrow A1 is viewed in cross section in FIG. 1B, and shows the structure when the side of the first square steel pipe column 102 is viewed. The joint portion 100 is provided on each surface of the first square steel pipe column 102. FIG. 2 shows joints 100 formed on each surface of the first square steel pipe column 102 in a clockwise direction with respect to the first joint 100a, the second joint 100b, the third joint 100c, and the fourth joint. It is shown as a joint portion 100d. In the first joint portion 100a, the first flange 104a is sandwiched between the first attachment plate 130a and the second attachment plate 140a. Then, the bolt 122 is inserted into the first bolt hole 106a, the third bolt hole 132a, and the fifth bolt hole 142a and fastened by the nut 124. In the joint portion 100, the first flange 104, the first attachment plate 130, and the second attachment plate 140 are bolted at a plurality of locations. Such a structure is the same for the second joint portion 100b, the third joint portion 100c, and the fourth joint portion 100d.

The first square steel pipe column 102 has first notched portions 108a, 108b, 108c, 108d at the corner portions. A first opening 120a, a second opening 120b, a third opening 120c, and a fourth opening 120d are formed corresponding to the first notches 108a, 108b, 108c, and 108d. That is, a first opening 120a is formed between the first joint portion 100a and the second joint portion 100b, and a second opening portion 120a is formed between the second joint portion 100b and the third joint portion 100c. The opening 120b is formed, a third opening 120c is formed between the third joint 100c and the fourth joint 100d, and the fourth joint 100d and the first joint 100a are formed. A fourth opening 120d is formed between them. The first opening 120a, the second opening 120b, the third opening 120c, and the fourth opening 120d are spaces inside the first square steel pipe column 102 and the second square steel pipe column 112. And the outer space are connected.

As shown in FIG. 1 (B), in a state where one end of the first square steel pipe column 102 and one end of the second square steel pipe column 112 are butted and both are joined by a flange and a side plate, the first notch is formed. The portion 108 and the second notch portion 118 are joined to form one opening 120.

As shown in FIGS. 1B and 2, the widths of the first flange 104 and the second flange 114 and the widths of the first attachment plate 130 and the second attachment plate 140 may be provided substantially the same. it can. Alternatively, the widths of the first attachment plate 130 and the second attachment plate 140 may be narrower than the widths of the first flange 104 and the second flange 114. Further, as shown in FIG. 1 (B), the length of the opening 120 along the longitudinal direction of the first square steel pipe column 102 and the second square steel pipe column 112 is the longitudinal direction of the first attachment plate 130. Can be formed longer than the length of. In other words, the length of each of the first attachment plate 130 and the second attachment plate 140 in the longitudinal direction can be shorter than the total length of the first flange 104 and the second flange 114. By having such a dimensional relationship between the first flange 104 and the second flange 114 and the first attachment plate 130 and the second attachment plate 140, the opening is maintained while maintaining the strength of the joint portion 100. It is possible to prevent the 120 from becoming smaller.

In the joint structure of the square steel pipe column according to the present embodiment, the joint portion 100 can be easily manufactured by having the opening 120 corresponding to the corner portion of the square steel pipe column. That is, when joining the first square steel pipe column 102 and the second square steel pipe column 112, the operator inserts the bolt 122 into the bolt hole from the inside using the opening 120 at the construction site to perform the bolt joining. It becomes easy to form. The height of the opening 120 may be about the same as the total length of the length of the first flange 104 (the length in the longitudinal direction of the square steel pipe column) and the length of the second flange 114 (the 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 having a size sufficient for the operator to put a tool or the like inside the square steel pipe column for work.

According to the present embodiment, the first notch 108 is provided at the corner adjacent to the first flange 104, the second notch 118 is provided at the corner adjacent to the second flange, and the first When joining the square steel pipe column 102 and the second square steel pipe column 112, the first notch 108 and the second notch 118 are connected to form the opening 120, thereby bolt-joining. Work can be facilitated. As a result, when joining square steel pipe columns, construction is easy regardless of welding, and high-quality bolt joints can be formed.

In the present embodiment, notches are provided in both the first square steel pipe column 102 and the second square steel pipe column 112, but the present invention is not limited to such an aspect, and the workability is improved. If there is no effect (if an opening with a sufficient diameter can be obtained), the notch is provided in only one of the first square steel pipe column 102 and the second square steel pipe column 112. There may be. If sufficient joint strength is ensured by design, one of the first attachment plate 130 and the second attachment plate 140 may be omitted. Further, the opening 120 does not have to be provided corresponding to each corner of the first square steel pipe column 102 and the second square steel pipe column 112, and is provided corresponding to a part of the corners. You may.

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

FIG. 3A shows a developed view of the joint portion of the square steel pipe column according to the present embodiment, and FIG. 3B shows a perspective view of the joint portion of the square steel pipe column. Further, FIG. 4 shows a cross-sectional view of the joint portion. In the following, the parts different from the first embodiment will be described.

As shown in FIG. 3A, a first web 150 connected to the first flange 104 is provided inside the first square steel pipe column 102. Similarly, the second square steel pipe column 112 is provided with a second web 160 connected to the second flange 114. As shown in FIG. 3B, the first web 150 and the second web 160 are provided at the joint portion 100 at positions where the opening 120 is not blocked.

FIG. 4 shows the structure of the joint portion 100 when the portion indicated by the arrow A2 is cross-sectionally viewed in FIG. 3B, and shows the structure when the side of the first square steel pipe column 102 is viewed. In this embodiment, the joint 100 is provided with a web in addition to the flange. As shown in FIG. 4, the first web 150 may be formed in a cross shape by a plate-shaped member. With such a shape, the first web 150 can be connected to the first flanges 104a, 104b, 104c, 104d arranged corresponding to each side surface of the first square steel pipe column 102. .. In this case, the second attachment plate 140 may be divided into a plurality of parts so as not to interfere with the first web 150. By preventing the position where the first web 150 is connected to the first flange 104 from overlapping the bolt holes, the second attachment plate 140 can be attached to the first flange 104 and bolted securely. can do. The first attachment plate 130 may also be divided into a plurality of parts in the same manner as the second attachment plate 140.

The connection between the first web 150 and the first flange 104 can be made, for example, by welding. By connecting the first web 150 to the first flanges 104a, 104b, 104c, 104d, the first joint portion 100a, the second joint portion 100b, the third joint portion 100c, and the fourth joint portion 100d The mechanical strength of the can be increased. For example, resistance to shearing forces acting on the joint 100 can be increased. Such a configuration is the same for the second web 160b in the second square steel pipe column 112.

Alternatively, a side plate may be provided on the web and bolted. FIG. 5 (A) shows a developed view of a square steel pipe column with a web bolted, FIG. 5 (B) shows a perspective view of a joint of a square steel pipe column with a web bolted, and FIG. A cross-sectional view of the joint is shown.

As shown in FIG. 5A, the first web 150 is provided with a seventh bolt hole 152, and the second web 160 is provided with an eighth bolt hole 162. The third attachment plate 154 and the fourth attachment plate 164 are provided so as to sandwich both the first web 150 and the second web 160. The third attachment plate 154 is provided with a ninth bolt hole 156, and the fourth attachment plate 164 is provided with a tenth bolt hole 166.

The third side plate 154 and the fourth side plate 164 are arranged inside the second side plate 140. When the first web 150 and the second web 160 have a cross shape, the third attachment plate 154 and the fourth attachment plate 164 are provided at at least two places, preferably four places. In this case, the first cutout portion 108 of the first square steel pipe column 102 and the second notch portion 118 provided in the second square steel pipe column 112 are provided at four locations corresponding to the corner portions of each steel pipe column. It is preferable that it is provided.

FIG. 5B shows a state in which the first square steel pipe column 102 and the second square steel pipe column 112 are bolted together. The bolted joints are formed in two regions, a region where the first flange 104 and the second flange 114 of the square steel pipe column are provided, and a region where the web inside the square steel pipe column is provided. As a result, the bonding structure according to the present embodiment can further increase the bonding strength.

FIG. 6 shows the cross-sectional structure of the joint portion 100 when the portion indicated by the arrow A3 is cross-sectionally viewed in FIG. 5B, and shows the structure when the side of the first square steel pipe column 102 is viewed. As shown in FIG. 6, the first web 150 is sandwiched between the third attachment plate 154 and the fourth attachment plate 164. Then, the bolt 122 is inserted into the seventh bolt hole 152, the ninth bolt hole 156, and the tenth bolt hole 166 and fastened by the nut 124. As a result, joints 100e, 100f, 100g, and 100h are formed inside the square steel pipe column. In this case, the first opening 120a, the second opening 120b, the third opening 120c, and the fourth by the first notch 108 correspond to each corner of the first square steel pipe column 102. Since the opening 120d of the above is formed, the work of forming the bolt joint can be easily performed. For example, in order to form the joint portion 100e, the operator can insert a tool or the like through the first opening 120a and the fourth opening 120d and perform the bolt tightening operation.

According to the present embodiment, the first web 150 is provided inside the first square steel pipe column 102 and connected to the first flange, and the second web 160 is provided inside the second square steel pipe column 112. By connecting to the second flange 114 provided, the strength of the joint portion 100 can be increased. Further, a seventh bolt hole 152 is provided in the first web 150, an eighth bolt hole 162 is provided in the second web 160, and the positions corresponding to the seventh bolt hole 152 and the eighth bolt hole 162 are provided. The strength of the joint 100 can be further increased by sandwiching the first web 150 and the second web 160 between the third attachment plate 154 and the fourth attachment plate 164 provided with the bolt holes and tightening the bolts. it can. In this case, by notching each corner of the first square steel pipe column 102 and the second square steel pipe column 112 and forming the opening 120, the work at the time of bolt tightening can be easily performed. .. That is, when the bolt joint is formed inside the square steel pipe column, the operator can bolt the joint using the opening, so that the workability at the time of construction can be improved.

[Third Embodiment]
This embodiment shows an embodiment in which the structure of the joint portion of the square steel pipe column is different from that of the first embodiment. In the following, the parts different from the first embodiment will be described.

FIG. 7A shows a developed view of the joint portion of the square steel pipe column according to the present embodiment, and FIG. 7B shows a perspective view of the joint portion. The first square steel pipe column 102 is provided with a first diaphragm 126 at one end. The first diaphragm 126 is provided so as to close the open end of the first square steel pipe column 102. The material for forming the first diaphragm 126 is arbitrary, but it is preferably formed of the same material as the first square steel pipe column 102. The first diaphragm 126 has a flat plate shape, and the main surface is provided so as to close the open end of the first square steel pipe column 102. The first diaphragm 126 is joined to the first square steel pipe column 102 by welding, for example.

The first flange 104 is provided on the first diaphragm 126. The first flange 104 is provided so as to stand upright on the main surface of the first diaphragm 126. The first diaphragm 126 is provided so as to correspond to each side surface of the first square steel pipe column 102. When the first square steel pipe column 102 is rectangular, the first flange 104 is provided so as to correspond to each side surface. The first flange 104 is joined, for example, to the first diaphragm 126 by welding.

Although not shown, the first flange 104 can be arranged in any number regardless of the cross-sectional shape of the first square steel pipe column 102. For example, when the cross-sectional shape of the first square steel pipe column 102 is circular, the first flange 104 can be arranged so as to form four surfaces. Further, when the cross-sectional shape of the first square steel pipe column 102 is rectangular, the first diaphragm 126 can be arranged so as to form a triangle or a polygon (for example, a pentagon, a hexagon, etc.).

By providing the first diaphragm 126 as a member separate from the first square steel pipe column 102, the degree of freedom in designing the joint portion 100 can be increased. For example, the thicknesses of the first square steel pipe column 102 and the first flange 104 can be made different. Further, the strength of the joint portion 100 can be increased by increasing the thickness of the first flange 104 as compared with the thickness of the first square steel pipe column 102. Further, the arrangement of the first flange 104 can be arranged inside the outer surface of the first square steel pipe column 102. As a result, the outer diameter of the joint portion 100 can be made smaller than the outer diameter of the first square steel pipe column 102, and the bolts can be arranged inside the outer surface of the first square steel pipe column 102. Further, by providing the first diaphragm 126, buckling of the flange of the first square steel pipe column 102 can be suppressed. In addition, stress is distributed to a plurality of flanges, and it is possible to prevent stress from concentrating on a specific flange. Further, the first flange 104 can be provided with a material different from that of the first square steel pipe column 102. For example, when the first square steel pipe column 102 and the first flange 104 are made of steel, for example, the first flange 104 contains chromium (Cr), molybdenum (Mo), and nickel (Ni). A material with an increased amount can be used. Thereby, both high tensile strength and high toughness can be enhanced at the joint portion 100.

The configuration on the side of the first square steel pipe column 102 has been described above, but the configuration of the second square steel pipe column 112 is also the same. That is, the second square steel pipe column 112 is provided with a second diaphragm 128 and a second flange.

As shown in FIG. 7A, the first flange 104 is provided at a position not overlapping the corner portion of the first square steel pipe column 102, and the first flange 104 is a corner portion of the second square steel pipe column 112. It is provided so that it does not overlap with the. With such a flange arrangement, when the first square steel pipe column 102 and the second square steel pipe column 112 are joined as shown in FIG. 7B, an opening 120 is formed at the joint portion 100. The opening 120 can be formed corresponding to each corner of the first square steel pipe column 102 and the second square steel pipe column 112.

The configuration of the joint portion 100 is the same as that of the first embodiment. FIG. 8 shows the cross-sectional structure of the joint portion 100 when the portion indicated by the arrow A4 in FIG. 7B is viewed in cross section, and shows the structure when the side of the first square steel pipe column 102 is viewed. As shown in FIG. 8, the joint portion 100 is provided so as to correspond to each side surface of the first square steel pipe column 102 by the first flange 104 fixed to the first diaphragm 126. FIG. 8 shows a first joint portion 100a formed by the first flange 104a, the first attachment plate 130a, and the second attachment plate 140a. The configurations of the first joint portion 100a, the second joint portion 100b, the third joint portion 100c, and the fourth joint portion 100d are the same as those in the first embodiment.

As shown in FIG. 8, the first flange 104a and the first flange 104b are arranged so as not to abut at the corners of the first square steel pipe column 102. Although not shown in the present embodiment, similarly, with respect to the second square steel pipe column 112, adjacent ones of the second flange 114 are arranged so as not to abut each other at the corner portion of the second square steel pipe column 112. To. Due to the arrangement of the first flange 104 and the second flange 114 in this way, the first opening 120a and the second opening 120a correspond to the corners of the first square steel pipe column 102 and the second square steel pipe column 112. The opening 120b, the third opening 120c, and the fourth opening 120d are formed.

As shown in FIG. 7B, when one end of the first square steel pipe column 102 and the second square steel pipe column 112 are joined, one opening 120 is formed. The opening 120 is a region connecting the inner space and the outer space of the square steel pipe column. With such a configuration, when joining the first square steel pipe column 102 and the second square steel pipe column 112, the operator inserts a tool or the like through the opening 120 to form a bolt joint at the construction site. Becomes easier.

The sizes of the first flange 104 and the second flange 114, and the first attachment plate 130 and the second attachment plate 140 can be set in the same manner as in the first embodiment. That is, the length (length in the longitudinal direction of the square steel pipe column) and width of the opening 120 are the dimensions of the first flange 104 and the second flange 114, and the first attachment plate 130 and the second attachment plate 140. It can be set in the same manner as in the first embodiment. As a result, it is possible to prevent the opening 120 from becoming smaller while maintaining the strength of the joint 100.

According to the present embodiment, the first square steel pipe column 102 is provided with the first diaphragm 126 and the first flange 104, and the second square steel pipe column 112 is provided with the second diaphragm 128 and the second flange 114. , The first flange 104 and the second flange 114 are arranged so that the opening 120 is formed when the double-sided steel pipe column is joined by using the first attachment plate 130 and the second attachment plate 140. As a result, the work of bolt joining can be facilitated. As a result, when joining square steel pipe columns, construction is easy regardless of welding, and high-quality bolt joints can be formed.

As shown in FIG. 9, the first diaphragm 126 may be provided with an opening 127. FIG. 9 shows an embodiment in which the opening 127 is provided substantially in the center of the first diaphragm 126. The number of openings 127 is not limited, and a plurality of openings 127 may be provided in the first diaphragm 126. By providing the opening 127 in the first diaphragm 126, the weight of the joint can be reduced, and the weight of the pillar body can be reduced. Although not shown, the same applies to the second diaphragm 128.

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

FIG. 10A shows a developed view of the joint portion of the square steel pipe column according to the present embodiment, and FIG. 10B shows a perspective view of the joint portion of the square steel pipe column. Further, FIG. 11 shows a cross-sectional view of the joint portion. In the following, the parts different from the third embodiment will be described.

As shown in FIG. 10A, a first web 150 connected to the first flange 104 is provided inside the first square steel pipe column 102. Similarly, the second square steel pipe column 112 is provided with a second web 160 connected to the second flange 114. The first web 150 is fixed to the first diaphragm 126, and the second web 160 is fixed to the second diaphragm 128. As shown in FIG. 10B, the first web 150 and the second web 160 are fixed at the joint portion 100 at a position where the opening 120 is not blocked.

FIG. 11 shows the cross-sectional structure of the joint portion 100 when the portion indicated by the arrow A5 in FIG. 10B is viewed in cross section, and shows the structure when the side of the first square steel pipe column 102 is viewed. As shown in FIG. 11, the first web 150 may be fixed not only to the first diaphragm 126 but also to the first flange 104 as in the second embodiment. The method of fixing the first web 150 to the first diaphragm 126 and the first flange 104 is arbitrary, but it is preferable to connect them by welding, for example. In this case, the second attachment plate 140 may be divided into a plurality of parts so as not to interfere with the first web 150. By preventing the position where the first web 150 is connected to the first flange 104 from overlapping the first bolt hole 106, the second attachment plate 140 can be attached to the first flange 104. Can be bolted securely.

By fixing the first web 150 to the first diaphragm 126 in this way, the mechanical strength of the joint portion 100 can be further increased. For example, resistance to shearing forces acting on the joint 100 can be increased. Such a configuration is the same for the second web 160b in the second square steel pipe column 112.

Similar to the second embodiment, a supplementary plate may be provided for each of the first web 150 and the second web 160 and bolted. FIG. 12 (A) shows a developed view of a square steel pipe column with a web bolted, FIG. 12 (B) shows a perspective view of a joint of a square steel pipe column with a web bolted, and FIG. A cross-sectional view of the joint is shown. The details of the structure in which the first web 150 and the second web 160 are fixed by the third attachment plate 154 and the fourth attachment plate 164 are the same as the configuration in the second embodiment. Further, also in the present embodiment, as the first diaphragm 126 and the second diaphragm 128, a structure provided with an opening 127 as shown in FIG. 9 can be applied.

FIG. 13 shows the cross-sectional structure of the joint portion 100 when the portion indicated by the arrow A6 is cross-sectionally viewed in FIG. 12B, and shows the structure when the side of the first square steel pipe column 102 is viewed. As shown in FIG. 13, a first opening 120a is formed between the first joint portion 100a and the second joint portion 100b, and the second joint portion 100b and the third joint portion 100c are formed. A second opening 120b is formed between them, a third opening 120c is formed between the third joint 100c and the fourth joint 100d, and the fourth joint 100d and the first A fourth opening 120d is formed between the joint portion 100a and the joint portion 100a. Since the first opening 120a, the second opening 120b, the third opening 120c, and the fourth opening 120d are formed, the work of forming the bolt joint can be easily performed. For example, in order to form the joint portion 100e formed inside the square steel pipe column, the operator may insert a tool or the like through the first opening 120a and the fourth opening 120d and perform bolt tightening work. it can.

According to the present embodiment, in addition to the configuration of the third embodiment, the third attachment plate 154 and the fourth attachment plate 164 are added to make the first web 150 and the second web 160 more attractive. Since it can be firmly fixed, the strength of the joint portion 100 can be further increased. Since the joint portion 100 has an opening 120 formed adjacent to the first diaphragm 126 and the second diaphragm 128, the work of forming the joint portion 100 by bolt joint can be easily performed. That is, when the bolt joint is formed inside the square steel pipe column, the operator can bolt the joint using the opening, so that the workability at the time of construction can be improved.

[Fifth Embodiment]
This embodiment shows an example in which the structure of the flange and the opening is different from that of the first embodiment in the joint structure of the square steel pipe column.

FIG. 14A shows a developed view of the joint portion of the square steel pipe column according to the present embodiment, and FIG. 14B shows a perspective view of the joint portion of the square steel pipe column. Further, FIGS. 15 (A) and 15 (B) show the cross-sectional structure of the joint shown in FIG. 14 (B). In FIG. 14A, fasteners such as bolts and nuts are omitted.

As shown in FIG. 14 (A), the first square steel pipe column 102 has a first flange 104a including a first bolt hole 106 at one end. The first flange 104a is provided at a portion continuous from the main body of the first square steel pipe column 102. The first bolt holes 106 are holes having a diameter through which bolts can be inserted and penetrating the first flange 104, and a plurality of first bolt holes 106 are provided in the plane of the first flange 104a. Further, the first square steel pipe column 102 has a first flange 104a on a surface adjacent to the first flange 104a with a corner portion interposed therebetween. Similarly, the second square steel pipe column 112 has a second flange 114a and a second flange 114b.

The first square steel pipe column 102 has a rectangular cross-sectional shape. In the present embodiment, the first notch 108 is provided at one end of the first square steel pipe column 102. The first notch 108 is provided so that at least two surfaces different from the surface on which the first flanges 104a and 104b are provided project. In other words, the first flanges 104a and 104b are provided at one end of the first square steel pipe column 102 notched by the first notch 108. On the other hand, the third flanges 105a and 105b are provided on the protruding portion of the first square steel pipe column 102. The third flanges 105a and 105b are provided at positions different from those of the first flanges 104a and 104b in the longitudinal direction of the first square steel pipe column 102. A second notch 118 is provided at one end of the second square steel pipe column 112. The cross-sectional shape of the second square steel pipe column 112 is rectangular, and has substantially the same pipe diameter as the first square steel pipe column 102. The second square steel pipe column 112 is provided with fourth flanges 115a and 115b at a portion protruding by the second notched portion 118. The fourth flanges 115a and 115b are provided at positions different from those of the second flanges 114a and 114b in the longitudinal direction of the second square steel pipe column 112.

The third flanges 105a and 105b provided on the first square steel pipe column 102 have the same configuration as the first flange 104a except that they are arranged at different positions. Further, the fourth flanges 115a and 115b provided on the second square steel pipe column 112 have the same configuration as the second flange 114a except that they are arranged at different positions.

As shown in FIG. 14A, the first cutout portion 108 is formed so as to cut out two consecutive surfaces of the first square steel pipe column 102. Similarly, the second notch portion 118 is also formed so as to notch two continuous surfaces of the second square steel pipe column 112. As shown in FIG. 14B, the first notch 108 and the second notch 118 butt one end of the first square steel pipe column 102 and one end of the second square steel pipe column 112. When they are formed, they are formed so as to bite each other. 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, the first flange 104a and the fourth flange 115a, and the first flange 104b and the fourth flange 115b Are arranged so as to be adjacent to each other. Similarly, the third flange 105a and the second flange 114a, and the third flange 105b and the second flange 114b are arranged so as to be adjacent to each other.

FIG. 14A also shows a first attachment plate 130a and a second attachment plate 140a. For example, the first attachment plate 130a is arranged outside the first square steel pipe column 102 and the second square steel pipe column 112, and the second attachment plate 140a is arranged inside. The first attachment plate 130a and the second attachment plate 140a are steel plates, and may be formed of the same material as the square steel pipe column. The thickness of the first attachment plate 130a and the second attachment plate 140a may be substantially the same as that of the first flange 104a, or may be thicker than that of the first flange 104a in order to increase the strength of the joint. You may. Further, if the total thickness of the first attachment plate 130a and the second attachment plate 140a is substantially the same as the thickness of the first flange 104a, the first attachment plate 130a and the second attachment plate 140a Each thickness may be thinner than the first flange 104a. The first attachment plate 130a is provided with a third bolt hole 132a at a position corresponding to the first bolt hole 106a and a fourth bolt hole 134a at a position corresponding to the second bolt hole 116a. The second attachment plate 140a is provided with a fifth bolt hole 142a at a position corresponding to the first bolt hole 106a and a sixth bolt hole 144a at a position corresponding to the second bolt hole 116a. 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, the first attachment plate 130a and the second attachment plate 140a have a first flange 104a and a fourth flange. It has a size capable of covering both 115a. It should be noted that the first attachment plate 130 and the second attachment plate 140 may be provided so as to connect the first flange 104 and the second flange 114, as in the first embodiment. It may be divided into a plurality of parts. For example, one or both of the first attachment plate 130 and the second attachment plate 140 may be divided into two or more members in the longitudinal direction.

Similarly, a first attachment plate 130b and a second attachment plate 140b for joining the third flange 105a and the second flange 114a are provided. The first attachment plate 130b is arranged outside the first square steel pipe column 102 and the second square steel pipe column 112, and the second attachment plate 140b is arranged inside. The first attachment plate 130b is provided with a third bolt hole 132b at a position corresponding to the first bolt hole 106b, and a fourth bolt hole 134b is provided at a position corresponding to the second bolt hole 116b. The second attachment plate 140b is provided with a fifth bolt hole 142b at a position corresponding to the first bolt hole 106b, and a sixth bolt hole 144b is provided at a position corresponding to the second bolt hole 116b. 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, the first attachment plate 130b and the second attachment plate 14b have a third flange 105a and a second flange. It has a size capable of covering both 114a.

In addition, in FIG. 14A, a first attachment plate 130a and a second attachment plate 140a are provided so as to sandwich the first flange 104a and the fourth flange 115a, and the third flange 105a and the second flange are provided. A mode is shown in which the first attachment plate 130b and the second attachment plate 140b are provided so as to sandwich the flange 114a of the first attachment plate 130a and the second attachment plate 140a, and the first attachment plate 130a and the first attachment plate 140a. One of the flange plate 130b and the second flange plate 140b may be omitted. For example, if only one of the first attachment plate 130a and the second attachment plate 140a can sufficiently secure the joint strength, the other attachment plate may be omitted.

FIG. 14B shows a state in which the first square steel pipe column 102 and the second square steel pipe column 112 are bolted together. FIG. 14B shows the first joint portion 100a and the second joint portion 100b (not shown) at the portion where the first square steel pipe column 102 and the second square steel pipe column 112 are joined, clockwise. ), The third joint portion 100c (not shown), and the fourth joint portion 100d are provided. The first joint portion 100a between the first square steel pipe column 102 and the second square steel pipe column 112 is a first flange 104a, a fourth flange 115a, a first attachment plate 130a, and a second attachment plate. Includes 140a. The first attachment plate 130a and the second attachment plate 140a sandwich a first flange 104a and a fourth flange 115a, and sandwich a first bolt hole 106a, a third bolt hole 132a, and a fifth bolt hole. 142a is arranged so as to communicate with each other, and the second bolt hole 116a, the fourth bolt hole 134a, and the sixth bolt hole 144a communicate with each other. Then, bolts are inserted into these bolt holes that communicate with each other and fastened with nuts. The fourth joint portion 100d includes a third flange 105a, a second flange 114a, a first attachment plate 130b, and a second attachment plate 140b, and has the same configuration as the first joint portion 100a. Although not shown, the second joint portion 100b and the third joint portion 100c have the same configuration as the first joint portion 100a.

The first square steel pipe column 102 has a first opening 120a on a surface adjacent to the first flange 104a (a surface on which the third flange 105a is provided), and is on a surface facing the first flange 104a. It has a second opening 120b. The second square steel pipe column 112 has a third opening 120c on the same surface as the fourth flange 115a and a fourth opening 120d (not shown) on an adjacent surface. The first opening 120a, the second opening 120b, the third opening 120c, and the fourth opening 120d are spaces inside the first square steel pipe column 102 and the second square steel pipe column 112. And the outer space are connected.

FIG. 15 (A) shows the cross-sectional structure of the joint portion 100 when the portion indicated by the arrow A7 in FIG. 14 (B) is viewed in cross section, and shows the structure when the side of the first square steel pipe column 102 is viewed. .. Further, FIG. 15 (B) shows the cross-sectional structure of the joint portion 100 when the portion indicated by the arrow A8 in FIG. 14 (B) is viewed in cross section, and the structure when the side of the second square steel pipe column 112 is viewed. Is shown. As shown in FIG. 15 (A), in the first square steel pipe column 102, a first joint portion 100a is formed by a first flange 104a, and a first flange provided on an adjacent surface across the corner portion. A second joint 100b is formed at 104b. In the first square steel pipe column 102, a second opening 120b is provided on the surface facing the first joint 100a, and the first opening 120a is provided on the surface facing the second joint 100b. Provided. Further, as shown in FIG. 15B, a third joint portion 100c is formed on the second flange 114b, and a fourth joint portion 100d is formed on the second flange 114a. In the second square steel pipe column 112, a third opening 120c is provided on the surface facing the third joint 100c, and a fourth opening 120d is provided on the surface facing the fourth joint 100d. Provided. The configurations of the first joint portion 100a, the second joint portion 100b, the third joint portion 100c, and the fourth joint portion 100d are the same as those in the first embodiment.

As shown in FIG. 15A, the first opening 120a and the second opening 120b are portions that connect the inner space and the outer space of the first square steel pipe column 102. Further, the third opening 120c and the fourth opening 120d serve as a portion connecting the inner space and the outer space of the second square steel pipe column 112. As shown in FIGS. 14 (B), 15 (A), and 15 (B), when the first square steel pipe column 102 and the second square steel pipe column 112 are joined, the first joint portion is formed. A third opening 120c is arranged on the same surface side with respect to 100a, a second opening 120b is arranged on the opposite surface side, and a first opening is arranged on the surface side adjacent to the first joint portion 100a. A portion 120a and a fourth opening 120d (not shown in FIG. 14) are arranged. By arranging the plurality of openings with respect to the first joint portion 100a in this way, the operator can easily join the first square steel pipe column 102 and the second square steel pipe column 112. It becomes. That is, at the construction site, the operator inserts tools and the like from not only the first opening 120a but also the second opening 120b, the third opening 120c, and the fourth opening 120d to perform bolt joining. It can be easily installed. In this case, the first opening 120a and the second opening 120b are arranged at the same height, the third opening 120c and the fourth opening 120d are arranged at the same height, and the first By arranging the opening 120a and the third opening 120c at different heights, it is possible to insert tools and the like into the inside of the square steel pipe column from various angles, increasing the degree of freedom of work. Can be done.

FIG. 16A shows a configuration in which the notch portion has a different configuration from that in FIG. 14A. FIG. 16A shows a developed view of the joint portion of the square steel pipe column, and FIG. 16B shows a perspective view of the joint portion of the square steel pipe column. 17 (A) and 17 (B) show the cross-sectional structure of the joint corresponding to FIG. 16 (B). In FIG. 16A, fasteners such as bolts and nuts are omitted.

The configuration shown in FIG. 16A is different from the configuration shown in FIG. 14A in that the first notch 108 and the second notch 118 are configured. Specifically, the first cutout portion 108 is provided so as to cut out two opposing surfaces at one end of the first square steel pipe column 102. Similarly, the second cutout portion 118 is also provided so as to cut out two opposing surfaces at one end of the second square steel pipe column 112. Then, as in the case shown in FIG. 14A, the first square steel pipe column 102 is provided with the first flanges 104a and 104b and the third flanges 105a and 105b, and the second square steel pipe column 112 is provided with the third flanges 104a and 104b. Is provided with second flanges 114a and 114b and fourth flanges 115a and 115b. The first flanges 104a and 104b, the second flanges 114a and 114b, the third flanges 105a and 105b, and the fourth flanges 115a and 115b, and the first attachment plates 130a and 130b shown in FIG. 16A. The configurations of the second flange plates 140a and 104b are the same as those shown in FIG. 14 (A).

As shown in FIG. 16B, one end of the first square steel pipe column 102 and one end of the second square steel pipe column 112 are bitten by the first notch 108 and the second notch 118. They are butted together so that they fit together. Although not shown in detail in FIG. 16 (B), by providing flanges on each surface of the first square steel pipe column 102 and the second square steel pipe column 112, joints can be provided on each surface of the square steel pipe column. it can. For example, when the cross-sectional shape of the square steel pipe column is rectangular, joints can be provided so as to correspond to each side surface. That is, although not shown in FIG. 16B, a second joint portion 100b, a third joint portion 100c, and a fourth joint portion 100d can be provided clockwise from the first joint portion 100a.

FIG. 17A shows the cross-sectional structure of the joint portion 100 when the portion indicated by the arrow A9 is cross-sectionally viewed in FIG. 16B, and shows the structure when the side of the first square steel pipe column 102 is viewed. .. Further, FIG. 17B shows a cross-sectional structure of the joint portion 100 when the portion indicated by the arrow A10 in FIG. 16B is viewed in cross section, and is a structure when the side of the second square steel pipe column 112 is viewed. Is shown. As shown in FIG. 17 (A), the first square steel pipe column 102 has a first joint portion 100a, a first opening 120a and a second opening on both side surfaces adjacent to each other with the corner portion interposed therebetween. 120b and 120b are provided respectively. The first square steel pipe column 102 is provided so that the first opening 120a and the second opening 120b face each other. With such a configuration, when the first joint portion 100a and the third joint portion 100c are bolted, bolt tightening or the like can be performed using the first opening 120a and the third opening 120c. , Construction can be done easily. As shown in FIG. 17 (B), the second square steel pipe column 112 has a third joint portion 100d and a third opening 120c and a fourth opening on both side surfaces adjacent to both sides of the corner portion. The opening 120d of the above is provided respectively. The second square steel pipe column 112 is provided so that the third opening 120c and the fourth opening 120d face each other. With such a configuration, when the second joint portion 100b and the fourth joint portion 100d are bolted, bolt tightening or the like can be performed using the third opening 120c and the fourth opening 120d. , Construction can be done easily. The first opening 120a and the second opening 120b are provided at substantially the same height, and the third opening 120c and the fourth opening 120d are provided at substantially the same height. On the other hand, as shown in FIG. 16B, the first opening 120a and the third opening 120c are provided at different heights. As a result, in the bolt tightening work of the joint portion 100, the tool can be inserted at various angles by appropriately selecting the opening, and the ease of construction can be improved.

FIG. 18A shows a configuration in which the notch portion is configured differently from that in FIG. 16A. FIG. 18A shows a developed view of the joint portion of the square steel pipe column, and FIG. 18B shows a perspective view of the joint portion of the square steel pipe column. 19 (A) and 19 (B) show cross-sectional views of the joint shown in FIG. 18 (B). In FIG. 18A, fasteners such as bolts and nuts are omitted.

In the configuration shown in FIG. 18A, the first notch 108 is provided so as to cut one surface of the first square steel pipe column 102, and the second notch 110 is a second. An embodiment is shown in which the square steel pipe column 112 is provided so as to cut out three surfaces. With the first notch 108, the first square steel pipe column 102 has a first flange 104a, and the protrusion formed by the first notch 108 has third flanges 105a, 105b, 105c. Is provided. The third flanges 105a, 105b, 105c are provided so as to surround the three surfaces. Further, by the second notch 118, the second square steel pipe column 112 has the second flanges 114a, 114b, 114c, and the protrusion formed by the second notch 118 has a fourth flange. 115a is provided.

As shown in FIG. 18B, one end of the first square steel pipe column 102 and one end of the second square steel pipe column 112 are bitten by the first notch 108 and the second notch 118. They are butted together so that they fit together. Since flanges are provided on each surface of the first square steel pipe column 102 and the second square steel pipe column 112, a joint can be formed on each surface. For example, at the joint between the first square steel pipe column 102 and the second square steel pipe column 112, the first joint portion 100a, the second joint portion 100b (not shown), and the third joint are joined clockwise. A portion 100c (not shown) and a fourth joint portion 100d are provided.

FIG. 19A shows the cross-sectional structure of the joint portion 100 when the portion indicated by the arrow A11 is cross-sectionally viewed in FIG. 18B, and shows the structure when the side of the first square steel pipe column 102 is viewed. .. Further, FIG. 19B shows the cross-sectional structure of the joint portion 100 when the portion indicated by the arrow A12 in FIG. 18B is viewed in cross section, and the structure when the side of the second square steel pipe column 112 is viewed. Is shown.

As shown in FIG. 19A, the first square steel pipe column 102 is provided with a first opening 120a on one surface adjacent to the first joint 100a via the corner portion, and the other surface. Is provided with a second opening 120b. Further, the first square steel pipe column 102 is provided with a third opening 120c on a surface facing the first joint 100a. As described above, the first square steel pipe column 102 is provided with openings on three sides with respect to the first joint portion 100a. The first opening 120a, the second opening 100b, and the third opening 120c are provided at substantially the same positions in the longitudinal direction of the first square steel pipe column 102.

As shown in FIG. 19B, the second square steel pipe column 112 is provided so that the second joint portion 100b, the third joint portion 100c, and the fourth joint portion 100d surround three sides. Further, the second square steel pipe column is provided with a fourth opening 120d on a surface facing the second joint 100c.

As shown in FIG. 18B, the heights of the first opening 120a, the second opening 120b, and the third opening 120c and the fourth opening 120d are different. With such a configuration, when bolting each joint, it is possible to perform work such as bolt tightening using each opening, and the construction can be easily performed.

According to the present embodiment, by providing an opening in the plane of the square steel pipe column and arranging the openings at different heights, the height is substantially the same as the joint portion of the adjacent flanges. By providing the opening, the work of bolt joining can be facilitated. As a result, when joining square steel pipe columns, construction is easy regardless of welding, and high-quality bolt joints can be formed.

100 ... Joint, 102 ... 1st square steel tube column, 104 ... 1st flange, 105 ... 3rd flange, 106 ... 1st bolt hole, 108 ... 1st notch, 112 ... 2nd square steel tube column, 114 ... 2nd flange, 115 ... 4th flange, 116 ... 2nd bolt hole, 118 ... Second notch, 120 ... opening, 122 ... bolt, 124 ... nut, 126 ... first diaphragm, 127 ... opening, 128 ... second diaphragm , 130 ... 1st flange plate, 132 ... 3rd bolt hole, 134 ... 4th bolt hole, 140 ... 2nd flange plate, 142 ... 5th bolt hole 144 ... 6th bolt hole, 150 ... 1st web, 152 ... 7th bolt hole, 154 ... 3rd flange plate, 156 ... 9th bolt hole, 160 ... 2nd web, 162 ... 8th bolt hole, 164 ... 4th flange plate, 166 ... 10th bolt hole

Claims (14)

A first flange including a first bolt hole provided at one end of a first square steel pipe column, and a first flange.
A first notch provided at a corner of the first square steel pipe column adjacent to the first flange, and a first notch.
A second flange including a second bolt hole provided at one end of the second square steel pipe column, and a second flange.
A second notch provided at a corner of the second square steel pipe column adjacent to the second flange, and a second notch.
A third bolt hole is provided at a position corresponding to the first bolt hole in contact with one surface of each of the first flange and the second flange, and a position corresponding to the second bolt hole. With a first attachment plate provided with a fourth bolt hole in the
In a state where 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 between the first notch and the second notch.
The first square steel pipe column and the second square steel pipe column are bolted together using the first flange, the second flange, and the first attachment plate.
Joint structure of square steel pipe columns. A first web provided inside the first square steel pipe column and connected to the first flange,
The joint structure of a square steel pipe column according to claim 1, further comprising a second web provided inside the second square steel pipe column and connected to the second flange. The first diaphragm that closes one end of the first square steel pipe column,
A plurality of first flanges corresponding to each side surface of the first square steel pipe column, arranged so as to form a gap at each corner portion, and each including a first bolt hole,
A second diaphragm that closes one end of the second square steel pipe column,
A plurality of second flanges that correspond to each side surface of the second square steel pipe column and are arranged so as to form a gap at each corner portion and include a second bolt hole, respectively.
A third bolt hole is provided at a position corresponding to the first bolt hole in contact with one surface of each of the first flange and the second flange, and a position corresponding to the second bolt hole. With a first attachment plate provided with a fourth bolt hole in the
One end of the first square steel pipe column and one end of the second square steel pipe column are arranged to face each other, and one end of the first flange and one end of the second flange are abutted against each other.
The plurality of first flanges and the plurality of second flanges form a plurality of openings corresponding to the corner portions of the first square steel pipe column and the second square steel pipe column.
The first square steel pipe column and the second square steel pipe column are bolted together using the first flange, the second flange, and the first attachment plate.
Joint structure of square steel pipe columns. A first web provided inside the first square steel pipe column and connected to the first flange and the first diaphragm.
The joint structure of a square steel pipe column according to claim 3, further comprising a second web provided inside the second square steel pipe column and connected to the second flange and the second diaphragm. A first flange having a first bolt hole provided at at least one end and a first notch provided so that a region other than the first flange protrudes. Square steel pipe columns and
A second square having a second flange provided with a second bolt hole at at least one end and a second notch provided so that a region of the second flange projects. Steel pipe columns and
A third bolt hole is provided at a position corresponding to the first bolt hole in contact with the first flange and the second flange, and a fourth bolt hole is provided at a position corresponding to the second bolt hole. With a first brace provided with
The first square steel pipe column and the second square steel pipe column are the first flange and the second flange in a state where the first notch and the second notch are in mesh with each other. A joint structure of a square steel pipe column, which is bolted by a flange and the first attachment plate. A third flange having a seventh bolt hole provided in a region protruding by the first notch at one end of the first square steel pipe column.
A fourth flange having an eighth bolt hole provided at one end of the second square steel pipe column in a region other than the region protruding by the second notch.
A ninth bolt hole is provided at a position corresponding to the seventh bolt hole in contact with one surface of the third flange and the fourth flange, respectively, and at a position corresponding to the eighth bolt hole. Including a third attachment plate provided with a tenth bolt hole,
The first square steel tube column and the second square steel tube column are the first flange and the second flange in a state where the first notch portion and the second notch portion are in mesh with each other. A first joint bolted by a flange and the first attachment plate, and a second joint bolted by the third flange, the fourth flange, and the third attachment plate. And, including
The joint structure of a square steel pipe column according to claim 5. The first flange and the third flange are arranged along two adjacent sides of the first square steel pipe column in a cross-sectional view.
The second flange and the fourth flange are arranged along two adjacent sides of the second square steel pipe column in a cross-sectional view.
The joint structure of a square steel pipe column according to claim 6. The first flange and the third flange are arranged along two opposite sides of the first square steel pipe column in a cross-sectional view.
The second flange and the fourth flange are arranged along two opposite sides of the second square steel pipe column in a cross-sectional view.
The joint structure of a square steel pipe column according to claim 6. An eleventh bolt hole is provided at a position corresponding to the seventh bolt hole in contact with the third flange and the surface of the fourth flange opposite to the one surface, respectively, and the eighth bolt hole is provided. Further having a fourth flange plate provided with a twelfth bolt hole at a position corresponding to the bolt hole.
The joint structure of a square steel pipe column according to any one of claims 6 to 8. The first square steel pipe column has a first opening adjacent to the third flange.
The second square steel pipe column has a second opening adjacent to the second flange.
The square steel pipe according to claim 7 or 8, wherein the first opening and the second opening are different in position in the longitudinal direction of the first square steel pipe column and the second square steel pipe column. Joint structure of columns. A fifth bolt hole is provided at a position corresponding to the first bolt hole in contact with each of the first flange and the surface of the second flange opposite to the one surface, and the second bolt hole is provided. Further has a second attachment plate provided with a sixth bolt hole at a position corresponding to the bolt hole of the.
The joint structure of a square steel pipe column according to claim 1, 3, or 5. The first web has a seventh bolt hole and the second web has an eighth bolt hole.
A ninth bolt hole is provided at a position corresponding to the seventh bolt hole in contact with one surface of the first web and the second web, and a ninth bolt hole is provided at a position corresponding to the eighth bolt hole. A third attachment plate with 10 bolt holes and
An eleventh bolt hole is provided at a position corresponding to the seventh bolt hole in contact with the other surface of the first web and the second web, and the eighth bolt hole is provided at a position corresponding to the eighth bolt hole. Including a fourth appendage plate provided with 12 bolt holes,
The first web and the second web are bolted together by the third attachment plate and the fourth attachment plate.
The joint structure of a square steel pipe column according to claim 2 or 4. The widths of the first flange and the second flange are substantially the same as those of the first attachment plate.
The joint structure of a square steel pipe column according to claim 1, 3, or 5. The length of the opening along the longitudinal direction of the first square steel pipe column and the second square steel pipe column is longer than the length of the first attachment plate in the longitudinal direction.
The joint structure of a square steel pipe column according to claim 1 or 3.

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