JP7641329B2 - 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 construction sites of buildings, welding and bolting are used as methods for joining steel frame members. While welding ensures sufficient strength, it requires advanced skills and time, and the quality and performance are also affected by the skill of the worker. In contrast, bolting has the advantage of being able to shorten the construction period and facilitating quality control. For example, methods of bolting have been disclosed for joining steel pipe columns to H-shaped steel and for joining steel pipe columns to each other (see Patent Documents 1 and 2).

JP-A-5-179702 (Patent No. 3122209) JP 2004-293196 A (Patent No. 4038449)

When bolting steel frame components, components with an open cross-section such as H-shaped steel beams can be bolted easily. However, when using bolts to connect tubular components such as square steel pipe columns, there is a problem that construction is not easy. It is possible to process parts of the steel pipe columns to make construction of the structure easier, but there are concerns that this will reduce the strength of the joints.

One of the objectives of the present invention is to provide a joint structure for steel pipe columns that solves these problems.

A joint structure for a steel pipe column according to one embodiment of the present invention includes a first steel pipe column having a first through hole on a side surface, a second steel pipe column having a second through hole on a side surface, a first splice plate, a second splice plate, a first reinforcing plate having a first opening, and a second reinforcing plate having a second opening. The first reinforcing plate is provided in contact with the first steel pipe column so that the first opening overlaps the first through hole, and the second reinforcing plate is provided in contact with the second steel pipe column so that the second opening overlaps the second through hole. The first steel pipe column and the second steel pipe column are arranged in the vertical direction, the first splice plate is adjacent to the first reinforcing plate and is provided in contact with the side surfaces of the first steel pipe column and the second steel pipe column, including the boundary between the first steel pipe column and the second steel pipe column, and the second splice plate is adjacent to the second reinforcing plate and is provided in contact with the side surfaces of the first steel pipe column and the second steel pipe column, including the boundary between the first steel pipe column and the second steel pipe column. The first steel pipe column and the second steel pipe column are bolted together via the first splice plate and the second splice plate, and the first through hole and the second through hole are arranged in an oblique shape.

The steel pipe joint structure according to one embodiment of the present invention makes it easy to bolt steel pipe columns. Furthermore, the steel pipe column joint structure according to one embodiment of the present invention can prevent a decrease in strength of the bolted portion.

1A and 1B are perspective views of a joint structure of a steel pipe column according to one embodiment of the present invention, in which (A) shows an expanded view and (B) shows a bolted joint in a joint structure of two steel pipe columns. FIG. 2 is a front view of a bolt joint in a steel pipe column joint structure according to one embodiment of the present invention. 3 shows a cross-sectional structure of a bolt joint in the joint structure of the steel pipe column shown in FIG. 2 . FIG. 2 is a front view of a bolt joint in a steel pipe column joint structure according to one embodiment of the present invention. 1A and 1B are perspective views of a joint structure of a steel pipe column according to one embodiment of the present invention, in which (A) shows an expanded view and (B) shows a bolted joint in a joint structure of two steel pipe columns. 6 shows a cross-sectional structure of a bolt joint in the joint structure of the steel pipe column shown in FIG. 1A and 1B are perspective views of a joint structure of a steel pipe column according to one embodiment of the present invention, in which (A) shows an expanded view and (B) shows a bolted joint in a joint structure of two steel pipe columns. 8 shows a cross-sectional structure of a bolt joint in the joint structure of the steel pipe column shown in FIG. 7 . 1A and 1B are perspective views of a joint structure of a steel pipe column according to one embodiment of the present invention, in which (A) shows an expanded view and (B) shows a bolted joint in a joint structure of two steel pipe columns. FIG. 2 is a front view of a bolt joint in a steel pipe column joint structure according to one embodiment of the present invention. 10 shows a cross-sectional structure of a bolt joint in the joint structure of the steel pipe column shown in FIG.

The contents of the embodiment of the present invention will be described below with reference to the drawings. However, the present invention includes many different aspects, and is not to be interpreted as being limited to the contents of the embodiment exemplified below. In order to make the explanation clearer, the width, thickness, shape, etc. of each part may be shown diagrammatically compared to the actual aspect, but this is merely an example and does not limit the contents of the present invention. Furthermore, in this specification, when an element shown in one drawing and an element shown in another drawing are identical or correspond to each other, the same symbol (or a, b, etc. added to the number shown as the symbol) may be added, and repeated explanations may be omitted as appropriate. Furthermore, the letters "first" and "second" added to each element are convenient marks used to distinguish each element, and have no further meaning unless otherwise explained.

[First embodiment]
The joint structure of a steel pipe column according to one embodiment of the present invention has a structure in which a first steel pipe column and a second steel pipe column are joined by bolt joints. The joint structure will be described in detail below. In this embodiment, the joint structure of a square steel pipe column will be illustrated as an example of a type of steel pipe column.

Figure 1(A) shows an exploded view of the joint portion of the joint structure of the steel pipe column according to this embodiment, and Figure 1(B) shows a perspective view of the joint structure of the steel pipe column according to this embodiment. Note that in Figure 1(A), fastening members such as bolts and nuts are omitted.

1(A) and (B) show the case where the cross-sectional shapes of the first steel pipe column 102 and the second steel pipe column 112 are rectangular. In the following description, for convenience, the first steel pipe column 102 has four planes, and each plane is indicated counterclockwise as the first plane 11, the second plane 12, the third plane 13, and the fourth plane 14. Similarly, the second steel pipe column 112 has each plane indicated counterclockwise as the first plane 21, the second plane 22, the third plane 23, and the fourth plane 24. In addition, unless otherwise specified, the first steel pipe column 102 is arranged on the lower side in the material axis direction, and the second steel pipe column 112 is arranged on the upper side.

As shown in FIG. 1(A), the first steel pipe column 102 has a first notch 106a and a second notch 106b at one end. The first notch 106a is formed by removing one end of the second surface 12 of the first steel pipe column 102 over a predetermined length in the material axis direction, and the second notch 106b is formed by removing one end of the fourth surface 14 over a predetermined length in the material axis direction. At one end of the first steel pipe column 102, a first protruding portion 104a and a second protruding portion 104b are provided that protrude from the recessed end when the recessed end is set as a reference by forming the first notch 106a and the second notch 106b. That is, the first protrusion 104a of the first steel pipe column 102 is formed on the first surface 11 of the first steel pipe column 102, and the second protrusion 104b is formed on the third surface 13 of the first steel pipe column 102.

The second steel pipe column 112 has a first notch 116a and a second notch 116b at one end. The first notch 116a is formed by removing one end of the first surface 21 of the second steel pipe column 112 over a predetermined length in the material axis direction, and the second notch 116b is formed by removing one end of the third surface 23 opposite the first surface 21 over a predetermined length in the material axis direction. At one end of the second steel pipe column 112, a first protruding portion 114a and a second protruding portion 114b are provided that protrude from the recessed end when the recessed end is set as a reference by forming the first notch 116a and the second notch 116b. That is, the second protrusion 114a is formed on the second surface 22 of the second steel pipe column 112, and the second protrusion 104b of the first steel pipe column is provided on the fourth surface 24.

The first steel pipe column 102 has a plurality of first bolt holes 108a in the region forming the first protrusion 104a on the first surface 11, and a plurality of second bolt holes 108b in the region adjacent to the first notch 106a on the second surface 12. Although not shown in FIG. 1(A), the same is true for the first bolt holes on the third surface 13 and the fourth surface 14. The second steel pipe column 112 has a plurality of first bolt holes 118a in the region adjacent to the first notch 116a on the first surface 21, and a plurality of second bolt holes 118b in the region forming the first protrusion 114a on the second surface 22 (the same is true for the third surface 23 and the fourth surface 24). The first bolt hole 108a and the second bolt hole 108b of the first steel pipe column, and the first bolt hole 118a and the second bolt hole 118b of the second steel pipe column 112 have a diameter that allows a bolt to be inserted, and are through holes that penetrate the steel pipe column.

The first splice plate 130a and the second splice plate 130b are arranged on the outside of the first steel pipe column 102 and the second steel pipe column 112, and the splice plate 140a facing the first splice plate and the splice plate 140b facing the second splice plate are arranged on the inside of the first steel pipe column 102 and the second steel pipe column 112. The first splice plate 130a has a first splice plate bolt hole 132a corresponding to the first bolt hole 108a of the first steel pipe column 102 and the first bolt hole 118a of the second steel pipe column 112, and the second splice plate 130b has a second splice plate bolt hole 132b corresponding to the second bolt hole 108b of the first steel pipe column 102 and the second bolt hole 118b of the second steel pipe column 112. The splice plate 140a facing the first splice plate has bolt holes 142a that correspond to the first bolt holes 108a of the first steel pipe column 102 and the first bolt holes 118a of the second steel pipe column, and the splice plate 140b facing the second splice plate has bolt holes 142b that correspond to the second bolt holes 108b of the first steel pipe column 102 and the second bolt holes 118b of the second steel pipe column 112.

The first steel pipe column 102 has a first through hole 120a and a third through hole 120c. The first through hole 120a is provided adjacent to the first protrusion 104a on the first surface 11, and the third through hole 120c is provided adjacent to the second protrusion 104b on the third surface 13. The second steel pipe column 112 has a second through hole 120b and a fourth through hole (not shown). The second through hole 120b is provided adjacent to the first protrusion 114a on the second surface 22, and the fourth through hole (not shown) is provided adjacent to the second protrusion 114b on the fourth surface 24.

The first steel pipe column 102 has a first reinforcing plate 122a on the first surface 11 and a third reinforcing plate (not shown) on the third surface 13. The first reinforcing plate 122a has a first opening 124a, and the third reinforcing plate (not shown) has a third opening 124c. The first reinforcing plate 122a is provided so that the first opening 124a overlaps with the first through hole 120a, and the third reinforcing plate (not shown) is provided so that the third opening 124c overlaps with the third through hole 120c. The second steel pipe column 112 has a second reinforcing plate 122b on the second surface 22 and a fourth reinforcing plate (not shown) on the fourth surface 24. The second reinforcing plate 122b has a second opening 124b, and the fourth reinforcing plate (not shown) has a fourth opening (not shown). The second reinforcing plate 122b is provided so that the second opening 124b overlaps with the second through hole 120b. Although not shown, the fourth reinforcing plate is provided so that the fourth opening overlaps with the fourth through hole.

The first opening 124a is not limited in shape, but has a size that does not block the first through hole 120a. For example, as shown in the figure, the first opening 124a may have approximately the same diameter as the first through hole 120a. The same is true for the second opening 124b and the second through hole 120b, the third opening 124c and the third through hole 120c, and the fourth opening and the fourth through hole (not shown).

When the first steel pipe column 102 and the second steel pipe column 112 are joined, the first reinforcing plate 122a and the first splice plate 130a are provided on the same surface (first surface 11 and first surface 21), but are large enough so that they do not interfere with each other. The first reinforcing plate 122a and the first splice plate 130a may be arranged so that their opposing ends are in contact with each other, or may be arranged at a distance from each other. This relationship also applies to the second reinforcing plate 122b and the second splice plate 130b.

The first reinforcing plate 122a is joined to the first steel pipe column 102, and the second reinforcing plate 122b is joined to the second steel pipe column 112. For example, the peripheral end of the first reinforcing plate 122a is joined to the first steel pipe column 102 by welding, and the peripheral end of the second reinforcing plate 122b is joined to the second steel pipe column 112 by welding.

As shown in FIG. 1(B), the first protrusion 104a and the second protrusion 104b of the first steel pipe column 102 are fitted to the first notch 116a and the second notch 116b of the second steel pipe column 112, and the first notch 106a and the second notch 106b of the first steel pipe column 102 are fitted to the first protrusion 114a and the second protrusion 114b of the second steel pipe column 112. Then, the first splice plate 130a and the second splice plate 130b are attached from the outside, and the splice plate 140a facing the first splice plate and the splice plate 140b facing the second splice plate are attached from the inside, and the first bolt joint 100a and the second bolt joint 100b are formed by being sandwiched between the two splices. Although not shown in FIG. 1(B), bolted joints are formed on each side of the steel pipe column (four sides in the case of a square steel pipe column). As shown, the first through hole 120a is positioned adjacent to the first bolted joint 100a, and the second through hole 120b is positioned adjacent to the second bolted joint 100b.

The first steel pipe column 102, the second steel pipe column 112, the first reinforcing plate 122a, the second reinforcing plate 122b, the first splice plate 130a, the second splice plate 130b, the splice plate 140a facing the first splice plate, and the splice plate 140b facing the second splice plate are made of steel materials. For example, these members are made of structural rolled steel. Figure 1 (A) shows a configuration in which the first steel pipe column 102 and the second steel pipe column 112 are sandwiched from both the outside and inside by the first splice plate 130a and the second splice plate 130b arranged on the outer side and the splice plate 140a facing the first splice plate and the splice plate 140b facing the second splice arranged on the inner side, but if the strength of the joint portion is sufficiently maintained, the splice plate abutting the inside or outside can be omitted.

2 shows a front view of the joint structure of the steel pipe column according to this embodiment. A 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, a second bolt joint 100b is formed on the second surface 12 and the second surface 22, and a third bolt joint 100c is formed on the third surface 13 and the third surface 23. In the first bolt joint 100a, the first splice plate 130a and the splice plate 140a facing the first splice plate have a size that allows them to abut both the first steel pipe column 102 and the second steel pipe column 112. The first splice plate 130a abuts against the first steel pipe column 102 and the second steel pipe column 112 from the outer side, and the splice plate 140a facing the first splice plate abuts against the inner side, and is fastened by fasteners (bolts 150 and nuts 152). This configuration is the same for the second bolt joint 100b and the third bolt joint 100c.

1(A) and (B), the protrusions and notches of the steel pipe columns arranged above and below are arranged to fit together, so that the heights of the first bolt joint 100a and the third bolt joint 100c are different from the height of the second bolt joint 100b. As shown in FIG. 2, the second bolt joint 100b is formed at a lower position than the first bolt joint 100a and the third bolt joint 100c. The second surface 22 of the second steel pipe column 112 is provided with a second through hole 120b and a second reinforcing plate 122b, sandwiched between the first bolt joint 100a and the third bolt joint 100c and adjacent to the second bolt joint 100b. In contrast, the first through hole 120a and the first reinforcing plate 122a, and the third through hole 120c and the third reinforcing plate 122c provided in the first steel pipe column 102 are provided at a lower position than the second through hole 120b and the second reinforcing plate 122b. In the joint structure of the steel pipe column according to this embodiment, the height of the bolt joint 100 and the position of the through hole 120 and the reinforcing plate 122 are arranged so that they are different on adjacent surfaces. In this way, by arranging the first bolt joint 100a and the second bolt joint 100b in an oblique shape, it is possible to increase the resistance to shear forces and bending stresses acting on the steel pipe column.

As shown in FIG. 2, by arranging a plurality of through holes at different heights for one bolt joint (e.g., the second bolt joint 100b) (e.g., the first through hole 120a and the third through hole 120c are arranged at a lower position than the second through hole 120b), the worker can easily join the first steel pipe column 102 and the second steel pipe column 112. That is, the worker can easily perform the bolt joint at the construction site by inserting tools, etc. through the plurality of through holes. For example, when constructing the second bolt joint 100b, the worker can insert tools, etc. not only through the second through hole 120b but also through the first through hole 120a and the third through hole 120c to perform the work. In this case, since the first through hole 120a and the third through hole 120c are arranged at different heights with respect to the second through hole 120b, it is possible to insert tools, etc. from various angles into the inside of the steel pipe column, and the degree of freedom of the work can be increased.

Figure 3(A) shows the cross-sectional structure of the area sandwiched between the arrows A1 and A2 in Figure 2, and Figure 3(B) shows the cross-sectional structure of the area sandwiched between the arrows B1 and B2 in Figure 2.

As shown in FIG. 3(A), the second steel pipe column 112 has a second through hole 120b and a fourth through hole 120d so as to be sandwiched between the first bolt joint 100a and the third bolt joint 100c. Also, as shown in FIG. 3(B), the first steel pipe column 102 has a first through hole 120a and a third through hole 120c so as to be sandwiched between the second bolt joint 100b and the fourth bolt joint 100d. In this way, the first to fourth through holes 120a, 120b, 120c, 120d are provided adjacent to the parts where the first to fourth bolt joints 100a, 100b, 100c, 100d are formed, so that the cross-sectional areas of the first steel pipe column 102 and the second steel pipe column 112 are relatively small compared to other parts. As a result, there is a concern that the strength of the steel pipe column will be reduced. One way to prevent a decrease in the strength of steel pipe columns is to reduce the number of through holes or the diameter of the through holes, but such measures would decrease workability.

In contrast, in this embodiment, as shown in FIG. 3(A), the second steel pipe column 112 is provided with a second reinforcing plate 122b in accordance with the second through hole 120b, and a fourth reinforcing plate 122d in accordance with the fourth through hole 120d. As shown in FIG. 3(B), the first steel pipe column 102 is provided with a first reinforcing plate 122a in accordance with the first through hole 120a, and a third reinforcing plate 122c in accordance with the third through hole 120c. This configuration makes it possible to compensate for the decrease in strength (rigidity) against shear force, bending stress, and axial stress caused by the provision of through holes in the steel pipe column.

The thicknesses of the first to fourth reinforcing plates 122a, 122b, 122c, and 122d are appropriately set. For example, they may be substantially the same as or thicker than the first steel pipe column 102 and the second steel pipe column 112. In order to compensate for the reduction in strength caused by providing a through hole in the steel pipe column, the cross-sectional area of the reinforcing plate and the cross-sectional area of the steel pipe column provided with the through hole may be set so as to satisfy the relationship shown in formula (1).
[Cross-sectional area of reinforcing plate] ≧ [Cross-sectional area of through hole of steel pipe column with through hole] (1)
In addition, in formula (1), the cross-sectional area of the reinforcing plate refers to the cross-sectional area at the maximum diameter part that intersects with the material axis direction of the first steel pipe column 102 at the opening, and the cross-sectional area of the steel pipe column provided with a through hole refers to the cross-sectional area at the maximum diameter part that intersects with the material axis direction of the first steel pipe column 102 at the through hole.

Moreover, the relationship shown in the above formula (1) can also be expressed in another way as shown in formula (2).
[Cross-sectional area of the general part of the steel pipe (part without through hole)] ≦ [Combined cross-sectional area of the steel pipe and the reinforcing plate at the maximum diameter part of the through hole] (2)
In any case, the first to fourth reinforcing plates 122a, 122b, 122c, and 122d may have thicknesses that satisfy the relationship of formula (1) or formula (2).

The first to fourth reinforcing plates 122a, 122b, 122c, and 122d may be joined to the inner side of each of the first steel pipe column 102 and the second steel pipe column 112, or may be provided on both sides of the outer side and the inner side. In any case, as exemplified in this embodiment, the peripheral ends of the first reinforcing plate 122a and the third reinforcing plate 122c are joined to the first steel pipe column 102 by welding, and the peripheral ends of the second reinforcing plate 122b and the fourth reinforcing plate 122d are joined to the second steel pipe column 112 by welding, thereby obtaining an effect substantially similar to that of increasing the thickness of each steel pipe column. In other words, by providing reinforcing plates so as to surround the periphery of the through hole provided in the steel pipe column, the substantial thickness of the peripheral region of the part where the through hole is provided can be increased, and a decrease in the strength (rigidity) of the part forming the joint by bolt joining can be prevented.

The first opening 124a provided in the first reinforcing plate 122a has a diameter that is approximately the same as or larger than the first through hole 120a, so that the provision of the through hole does not affect workability. This also applies to the other reinforcing plates (the second reinforcing plate 122b, the third reinforcing plate 122c, and the fourth reinforcing plate 122d).

Figures 1 (A) and (B) show an example of a steel pipe column with one through hole on each side, but one embodiment of the present invention is not limited to this example, and multiple through holes can be provided on each side of the steel pipe column. Even in such a case, a decrease in the strength (rigidity) of the steel pipe column can be prevented by providing reinforcing plates corresponding to each of the multiple through holes.

Thus, according to this embodiment, when joining the first steel pipe column 102 and the second steel pipe column 112, the workability of the bolt joint can be improved by providing a through hole in each steel pipe column, and by providing a reinforcing plate with an opening in line with the through hole, the decrease in strength of the joint portion can be suppressed, and a strength equal to or greater than that of other portions of the steel pipe column can be obtained. Note that while this embodiment shows a joint structure for steel pipes, one embodiment of the present invention is not limited to this aspect and can be equally applied to circular steel pipes and deformed steel pipes.

Second Embodiment
In this embodiment, the configuration of the reinforcing plate is different from that in the first embodiment, and the following description will focus on the differences from the first embodiment.

Figure 4 shows a front view of the joint structure of a steel pipe column according to this embodiment. The arrangement of the first reinforcing plate 122a, the second reinforcing plate 122b, and the third reinforcing plate 122c is the same as in the first embodiment. However, as shown in Figure 4, the sizes of the first reinforcing plate 122a, the second reinforcing plate 122b, and the third reinforcing plate 122c are different from those in the first embodiment.

Specifically, the length L2 of the second reinforcing plate 122b (the length in the material axis direction of the second steel pipe column) is such that the end ED2 (the end of one side intersecting with the material axis direction of the second steel pipe column 112) protrudes outward by a length k2 from the ends of the first bolt hole 118a and the third bolt hole 118c of the second steel pipe column 112 (the ends of the bolt holes located farthest from the ends of the first notch portion 116a and the second notch portion 116b). Although not shown in FIG. 4, the same applies to the fourth reinforcing plate provided on the fourth surface 24 of the second steel pipe column 112. Note that the length k2 can be defined as the distance from the end of the bolt hole located farthest from the ends of the first notch portion 116a and the second notch portion 116b among the plurality of second bolt holes 118a and the third bolt hole 118c, as shown in FIG. 4.

In addition to the second through hole 120b formed on the second surface 22, the second steel pipe column 112 has a plurality of first bolt holes 118a and third bolt holes 118c formed on the first surface 21 and the third surface 23. This reduces the effective cross-sectional area of the second steel pipe column 112, and there is concern that the strength of the joint portion may decrease. However, by positioning the end ED2 of the second reinforcing plate 122b beyond the ends of the first bolt hole 118a and the third bolt hole 118c of the second steel pipe column 112, the strength of the portion where the second through hole 120b is provided can be compensated for, and the strength of the portion where the bolt hole on the adjacent surface is provided can also be compensated for.

This is also true for the first steel pipe column 102. That is, the first reinforcing plate 122a is arranged so that the position of the first opening 124a overlaps with the first through hole 120a, and is joined to the first steel pipe column 102. The length L1 (length in the material axis direction of the first steel pipe column) of the first reinforcing plate 122a has a size such that the end ED1 (end of one side intersecting with the material axis direction of the first steel pipe column 102) protrudes outward by a length k1 from the end of the second bolt hole 108b of the first steel pipe column 102. This compensates for the strength of the portion where the first through hole 120a is provided, and also compensates for the strength of the portion where the bolt hole on the adjacent surface is provided. The same is true for the third reinforcing plate 122c. As shown in FIG. 4, length k1 can be defined as the distance from the end of the bolt hole that is located farthest from the ends of the first notch portion 106a and the second notch portion 106b of the first steel pipe column 102 among the multiple first bolt holes 108a and third bolt holes 108c.

On the other hand, the second reinforcing plate 122b and the second support plate 130b may be arranged so that their opposing ends are in contact with each other, or may be arranged at a distance. This relationship also applies to the first reinforcing plate 122a and the first support plate 130a, and the third reinforcing plate 122c and the third support plate 130c.

The length by which the reinforcing plate protrudes from the support plate can be set as desired. Although not shown, the same effect can be obtained even if the end of the reinforcing plate and the end of the support plate are arranged so as to be approximately aligned. In any case, as described above, the joint structure of the steel pipe column according to this embodiment can be made highly resistant to bending stress and shear force applied to the joint portion by, for example, having the first reinforcing plate 122a with a length L1 and the second reinforcing plate 122b with a length L2 (the same applies to the third reinforcing plate 122c and the fourth reinforcing plate).

The joint structure of the steel pipe column of this embodiment is the same as that of the first embodiment, except for the configuration of the reinforcing plate. Therefore, the joint structure of the steel pipe column of this embodiment not only achieves the same effects as the first embodiment, but also compensates for the reduction in strength caused by the formation of the bolt holes.

[Third embodiment]
This embodiment shows an aspect in which the configurations of the cutout portion and the protrusion portion are different from those of the first embodiment. The following description will focus on the differences from the first embodiment.

Figure 5 (A) shows an exploded view of the joint of the steel pipe column according to this embodiment, and Figure 5 (B) shows a perspective view of the joint of the steel pipe column. Also, Figures 6 (A) and 6 (B) show the cross-sectional structures of the C1 and C2 parts shown in Figure 5 (B). Note that fasteners such as bolts and nuts are omitted in Figure 5 (A).

As shown in FIG. 5(A), the first steel pipe column 102 has a first notch 106a and a second notch 106b on the second surface 12 and the third surface 13, and when the end recessed by these notches is used as a reference, a first protrusion 104a and a second protrusion 104b protruding from the recessed end are provided on the first surface 11 and the fourth surface 14. The second steel pipe column 112 has a first notch 116a and a second notch 116b on the first surface 21 and the fourth surface 24, and when the end recessed by these notches is used as a reference, a first protrusion 114a and a second protrusion 114b protruding from the recessed end are provided on the second surface 22 and the third surface 23. In this way, the first notch portion 106a and the second notch portion 106b are formed to cut out two consecutive faces of the first steel pipe column 102, and the first notch portion 116a and the second notch portion 116b are formed to cut out two consecutive faces of the second steel pipe column 112.

The first notch 106a and the second notch 106b of the first steel pipe column 102 are fitted to the first protrusion 114a and the second protrusion 114b of the second steel pipe column 112, and the first protrusion 104a and the second protrusion 104b of the first steel pipe column 102 are fitted to the first notch 116a and the second notch 116b of the second steel pipe column 112. Then, the first splice plate 130a and the second splice plate 130b are applied from the outside, and the splice plate 140a facing the first splice plate and the splice plate 140b facing the second splice plate are applied from the inside, and the first bolt joint 100a and the second bolt joint 100b are formed by being sandwiched between the two splices. Although not shown in FIG. 5(B), bolted joints are formed on each face (four faces) of the steel pipe column. The first bolted joint 100a and the second bolted joint 100b are formed to have different heights. In this way, by arranging the first bolted joint 100a and the second bolted joint 100b in an oblique shape, it is possible to increase the resistance to shear forces and bending stresses acting on the steel pipe column.

As shown in FIG. 6(A), the second steel pipe column 112 has a second through hole 120b on the second surface 22 and a third through hole 120c on the third surface 23. The second steel pipe column 112 has a second reinforcing plate 122b on the second surface 22 in accordance with the position of the second through hole 120b, and a third reinforcing plate 122c on the third surface 23 in accordance with the position of the third through hole 120c. Also, as shown in FIG. 6(B), the first steel pipe column 102 has a first through hole 120a on the first surface 11 and a fourth through hole 120d on the fourth surface 14. The first steel pipe column 102 has a first reinforcing plate 122a on the first surface 11 aligned with the position of the first through hole 120a, and a second reinforcing plate 122d on the fourth surface 14 aligned with the position of the fourth through hole 120d.

As shown in Figures 6(A) and (B), a configuration in which notches are provided on two adjacent faces of the steel pipe column (in other words, protrusions are provided on two adjacent faces) also allows through holes to be provided on each face of the steel pipe column. Even in this case, as shown in Figure 5(B), through holes of different heights (first through hole 120a, second through hole 120b) can be provided on adjacent faces of the steel pipe column.

In this way, by arranging multiple through holes 120 of different heights for one bolt joint 100, the worker can easily join the first steel pipe column 102 and the second steel pipe column 112. In this case, for example, since the first through hole 120a and the second through hole 120b are at different heights, the work can be easily performed regardless of the vertical position even when bolting the first bolt joint 100a and the second bolt joint 100b that extend vertically. For example, when fastening the first bolt joint 100a with a bolt, the worker can insert tools, etc. not only through the first through hole 120a but also through the second through hole 120b to perform the work.

In this embodiment as well, when joining the first steel pipe column 102 and the second steel pipe column 112, the ease of bolt joint construction can be improved by providing a through hole in each steel pipe column. Furthermore, by providing a reinforcing plate in line with the through hole, the decrease in strength of the joint portion can be suppressed, and the same or greater strength can be obtained as in other portions of the steel pipe column. Note that this embodiment can be implemented by appropriately incorporating the configuration of the second embodiment.

[Fourth embodiment]
This embodiment shows an aspect in which the configurations of the cutout portion and the protrusion portion are different from those of the first and second embodiments. The following description will focus on the differences from the first embodiment.

Figure 7 (A) shows an exploded view of the joint of the steel pipe column according to this embodiment, and Figure 7 (B) shows a perspective view of the joint of the steel pipe column. Also, Figures 8 (A) and 8 (B) show the cross-sectional structures of the D1 and D2 parts shown in Figure 7 (B). Note that fasteners such as bolts and nuts are omitted in Figure 7 (A).

Figure 7 (A) shows a configuration in which the configuration of the notch is different from that of Figures 1 (A) and 5 (A). The configuration shown in Figure 7 (A) shows an aspect in which three faces (second face 12, third face 13, fourth face 14) of the first steel pipe column 102 are notched, and a first notch 116a is provided on the first face 21 of the second steel pipe column 112. The first steel pipe column 102 has a first protrusion 104a on the first face 11, and the second steel pipe column 112 has a second protrusion 114b on the second face 22, a third protrusion 114c on the third face 23, and a fourth protrusion 114d on the fourth face 24.

As shown in FIG. 7(B), the first protrusion 104a of the first steel pipe column 102 and the first notch 116a of the second steel pipe column 112 are arranged to interlock. In the first steel pipe column 102 and the second steel pipe column 112, even if a notch is provided on one surface (or a part) of one steel pipe column and a protrusion is provided on the corresponding surface of the other steel pipe column as described above, the first bolt joint 100a, the second bolt joint 100b, the third bolt joint 100c, and the fourth bolt joint 100d can be arranged in an oblique manner. In addition, the heights of the first through hole 120a, the second through hole 120b, the third through hole 120c, and the fourth through hole 120d can be made different.

In this way, in this embodiment as well, when joining the first steel pipe column 102 and the second steel pipe column 112, the workability of the bolt joint can be improved by providing a through hole 120 in each steel pipe column. Furthermore, by providing a reinforcing plate 122 in line with the through hole 120, the decrease in strength of the joint portion can be suppressed, and strength equal to or greater than that of the other portions of the steel pipe column can be obtained. Note that this embodiment can be implemented by appropriately incorporating the configuration of the second embodiment.

[Fifth embodiment]
This embodiment shows an example in which a third reinforcing plate is further provided in the joint structure of the steel pipe column shown in the first embodiment. In the following, the difference from the first embodiment will be mainly described.

Figure 9 (A) shows an exploded view of the joint portion of the joint structure of the steel pipe column according to this embodiment, and Figure 9 (B) shows an oblique view of the joint structure of the steel pipe column according to this embodiment. Note that in Figure 9 (A), fastening members such as bolts and nuts are omitted.

As shown in FIG. 9(A), the first inner reinforcing plate 160a is provided on the inside of the first steel pipe column 102. The first inner reinforcing plate 160a 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 inscribed on the inner side surfaces of the first surface 11 and the third surface 13. The first inner reinforcing plate 160a is provided in an area overlapping with the first through hole 120a and the third through hole 120c. Similarly, the second inner reinforcing plate 160b is provided in the second steel pipe column 112.

As shown in FIG. 9(B), the first inner reinforcing plate 160a and the second inner reinforcing plate 160b are not exposed to the outside even after the first steel pipe column 102 and the second steel pipe column 112 are joined, but are stored inside the steel pipe column.

Figure 10 shows a front view of the joint structure of the steel pipe column according to this embodiment. A first inner reinforcing plate 160a is provided on the inside of the first steel pipe column 102 at the same height as the portion where the first through hole 120a and the third through hole 120c are provided. The first inner reinforcing plate 160a is provided so that its end abuts the inner side surface of the first surface 11 and the third surface 13. The first inner reinforcing plate 160a is fixed, for example, by welding to the inner side surface of the first surface 11 and the third surface 13 of the first steel pipe column. In this way, by providing the first inner reinforcing plate 160a so as to bridge the opposing inner side surface at the position where the through hole of the first steel pipe column 102 is provided, the strength of that portion can be increased. That is, the strength of the portion where the first through hole 120a and the third through hole 120c are provided in the first steel pipe column 102 can be supplemented.

The first inner reinforcing plate 160a may have a recess 162a formed at a position overlapping the first through hole 120a and the third through hole 120c. The shape of the recess 162a is arbitrary, but for example, it may have a semicircular shape having approximately the same diameter as the first through hole 120a and the third through hole 120c. By providing the recess 162a in the first inner reinforcing plate 160a, it is possible to prevent a part of the first through hole 120a and the third through hole 120c from being blocked. As a result, even when inserting a tool or the like through the first through hole 120a and the second through hole 120b, the first inner reinforcing plate 160a does not get in the way and does not reduce workability. The second inner reinforcing plate 160b provided on the second steel pipe column 112 has a configuration similar to that of the first inner reinforcing plate 160a provided on the first steel pipe column 102.

Figure 11 (A) shows the cross-sectional structure of the area between the arrows E1 and E2 in Figure 10, and Figure 11 (B) shows the cross-sectional structure of the area between the arrows F1 and F2 in Figure 10.

As shown in FIG. 11(A), the second steel pipe column 112 is provided with a second inner reinforcing plate 160b so as to bridge the inner side surface from the second surface 22 to the fourth surface 24. The second inner reinforcing plate 160b is provided at a position overlapping with the second through hole 120b and the fourth through hole 120d. A recess 162b is provided at the end of the second inner reinforcing plate 160b so as not to block a part of the through hole. As shown in FIG. 11(B), the first steel pipe column 102 is provided with a first inner reinforcing plate 160a so as to bridge the inner side surface from the first surface 11 to the third surface 13. The first inner reinforcing plate 160a is provided with a recess 162a at the end facing the first through hole 120a and the third through hole 120c.

As shown in Figures 11 (A) and (B) in the steel pipe column, a first inner reinforcing plate 160a and a second inner reinforcing plate 160b are provided in contact with both inner side surfaces of the opposing surfaces on which the through holes are provided, thereby compensating for the reduction in strength (rigidity) caused by the provision of the through holes. The other configurations of the steel pipe column according to this embodiment are the same as those of the first embodiment, and the same effects can be achieved. Note that this embodiment can be implemented by appropriately incorporating the configurations of the second and third embodiments.

100: bolted joint, 100a: first bolted joint, 100b: second bolted joint, 100c: third bolted joint, 100d: fourth bolted joint, 102: first steel pipe column, 104a: first protrusion (of first steel pipe column), 104b: second protrusion (of first steel pipe column), 106a: first notch (of first steel pipe column), 106b: second notch (of first steel pipe column), 108a: first bolt hole (of first steel pipe column), 108b: second bolt (of first steel pipe column) hole, 108c...third bolt hole (of the first steel pipe column), 112...second steel pipe column, 114a...first protrusion (of the second steel pipe column), 114b...second protrusion (of the second steel pipe column), 114c...third protrusion (of the second steel pipe column), 114d...fourth protrusion (of the second steel pipe column), 116a...first notch (of the second steel pipe column), 116b...second notch (of the second steel pipe column), 118a...first bolt hole (of the second steel pipe column), 118b...second bolt hole (of the second steel pipe column), 118c...・Third bolt hole (of the second steel pipe column), 120... through hole, 120a... first through hole, 120b... second through hole, 120c... third through hole, 120d... fourth through hole, 122a... first reinforcing plate, 122b... second reinforcing plate, 122c... third reinforcing plate, 122d... fourth reinforcing plate, 124a... first opening, 124b... second opening, 124c... third opening, 124d... fourth opening, 130a... first splice plate, 130b... second splice plate, 130c... third splice plate, 132a...bolt hole of first splice plate, 132b...bolt hole of second splice plate, 140a...splice plate opposite to first splice plate, 140b...splice plate opposite to second splice plate, 140c...splice plate opposite to third splice plate, 142a...bolt hole of splice plate opposite to first splice plate, 142b...bolt hole of splice plate opposite to second splice plate, 150...bolt, 152...nut, 160a...first inner reinforcing plate, 160b...second inner reinforcing plate, 162a...recess, 162b...recess

Claims (9)

A first steel pipe column having a first through hole on a side surface thereof;
A second steel pipe column having a second through hole on a side surface thereof;
A first splice plate and a second splice plate;
a first reinforcing plate having a first opening and a second reinforcing plate having a second opening;
Including,
The first reinforcing plate is joined to the first steel pipe column so that the first opening overlaps the first through hole,
The second reinforcing plate is joined to the second steel pipe column so that the second opening overlaps the second through hole,
The first steel pipe pole and the second steel pipe pole are bolted together using the first splice plate and the second splice plate,
In the material axis direction of the first steel pipe pole and the second steel pipe pole, the first splice plate is adjacent to the first reinforcing plate, and the second splice plate is adjacent to the second reinforcing plate ,
In a direction intersecting the material axis direction of the first steel pipe column and the second steel pipe column, the first reinforcing plate is adjacent to a portion bolted using the second splice plate, and the second reinforcing plate is adjacent to a portion bolted using the first splice plate,
In the material axis direction of the first steel pipe column and the second steel pipe column, an end portion of the first reinforcing plate opposite to the first splice plate extends outward from a portion bolted using the second splice plate, and an end portion of the second reinforcing plate opposite to the second splice plate extends outward from a portion bolted using the first splice plate.
Steel pipe column joint structure. 2. A steel pipe column joint structure as described in claim 1, wherein an end of the first reinforcing plate is arranged to contact an end of the first support plate, and an end of the second reinforcing plate is arranged to contact an end of the second support plate. The steel pipe column joint structure according to claim 1, wherein the first reinforcing plate is arranged at a distance from the first support plate, and the second reinforcing plate is arranged at a distance from the second support plate. The steel pipe pole joint structure according to any one of claims 1 to 3, wherein the first reinforcing plate is welded to the outer side of the first steel pipe pole, and the second reinforcing plate is welded to the outer side of the second steel pipe pole. The steel pipe pole joint structure according to any one of claims 1 to 3, wherein the first reinforcing plate is welded to the inner side surface of the first steel pipe pole, and the second reinforcing plate is welded to the outer side surface of the second steel pipe pole. 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 of a steel pipe column according to any one of claims 1 to 5 . The first steel pipe pole has a notched portion at one end thereof and a protruding portion protruding from an end portion of the first steel pipe pole recessed by the notched portion,
The second steel pipe pole has a notched portion at one end thereof and a protruding portion protruding from an end portion of the second steel pipe pole recessed by the notched portion,
The joint structure of the steel pipe pole according to any one of claims 1 to 6, wherein the notch of the first steel pipe pole and the protruding portion of the second steel pipe pole, and the protruding portion of the first steel pipe pole and the notch of the second steel pipe pole are arranged to interlock with each other. The steel pipe pole joint structure according to any one of claims 1 to 7, wherein the cross-sectional shapes of the first steel pipe pole and the second steel pipe pole are rectangular. The first splice plate and the second splice plate are in contact with different surfaces of the first steel pipe pole and the second steel pipe pole.
A joint structure for a steel pipe column according to any one of claims 1 to 8.

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