Steel pipe column joint structure

Abstract

To provide a steel pipe column joint structure which prevents decrease in strength.SOLUTION: A square steel pipe column joint structure comprises a first steel pipe column with a first through hole on the side surface, a second steel pipe column with a second through hole on the side surface, first and second doubling plates, a first reinforcing plate with a first opening part, and a second reinforcing plate with a second opening part. The first reinforcing plate is joined to the first steel pipe column such that the first opening part overlaps the first through hole, the second reinforcing plate is joined to the second steel pipe column such that the second opening part overlaps the second through hole, the first steel pipe column and the second steel pipe column are joined with bolts using the first doubling plate and the second doubling plate so that the first doubling plate is arranged adjacent to the first reinforcing plate and the second doubling plate is arranged adjacent to the second reinforcing plate.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] One embodiment of the present invention relates to a joint structure of a steel pipe column used in a building structure. [Background technology]

[0002] At construction sites of buildings, welding and bolting are used as methods for joining steel frame members. While welding can ensure 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 that it can shorten the construction period and makes quality control easy. 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). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP-A-5-179702 (Patent No. 3122209) [Patent Document 2] JP 2004-293196 A (Patent No. 4038449) Summary of the Invention [Problem to be solved by the invention]

[0004] When bolting steel members, it is easy to bolt members with an open cross-section such as H-beams. However, when bolting to connect tubular members such as square steel pipe columns, construction is not easy. It is possible to process a part of the steel pipe column to make construction easier, but this raises concerns that the strength of the joints will decrease.

[0005] One of the objects of the present invention is to provide a joint structure for a steel pipe column to solve such problems. [Means for solving the problem]

[0006] A joint structure for a steel pipe pole according to one embodiment of the present invention includes a first steel pipe pole having a first through hole on a side surface, a second steel pipe pole 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 pole so that the first opening overlaps with the first through hole, and the second reinforcing plate is provided in contact with the second steel pipe pole so that the second opening overlaps with the second through hole. A first steel pipe column and a second steel pipe column are arranged in a vertical direction, a first splice plate is provided adjacent to the first reinforcing plate and in contact with side surfaces of the first steel pipe column and the second steel pipe column including a boundary between the first steel pipe column and the second steel pipe column, and a second splice plate is provided adjacent to the second reinforcing plate and in contact with side surfaces of the first steel pipe column and the second steel pipe column including a 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. Effect of the Invention

[0007] According to the steel pipe joint structure of the present invention, the bolt joint of the steel pipe column can be easily performed. Furthermore, according to the steel pipe pole joint structure of the present invention, the strength of the bolt joint portion can be prevented from decreasing. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a joint structure of a steel pipe column according to one embodiment of the present invention, in which (A) shows an exploded view and (B) shows a bolted joint in the joint structure of two steel pipe columns. [Diagram 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. [Diagram 3] The cross-sectional structure of the bolted joint in the joint structure of the steel pipe column shown in Figure 2 is shown. [Figure 4] 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. [Diagram 5] FIG. 1 is a perspective view of a joint structure of a steel pipe column according to one embodiment of the present invention, in which (A) shows an exploded view and (B) shows a bolted joint in the joint structure of two steel pipe columns. [Figure 6] The cross-sectional structure of the bolted joint in the joint structure of the steel pipe column shown in Figure 5 is shown. [Figure 7] FIG. 1 is a perspective view of a joint structure of a steel pipe column according to one embodiment of the present invention, in which (A) shows an exploded view and (B) shows a bolted joint in the joint structure of two steel pipe columns. [Figure 8] The cross-sectional structure of the bolted joint in the joint structure of the steel pipe column shown in Figure 7 is shown. [Figure 9] FIG. 1 is a perspective view of a joint structure of a steel pipe column according to one embodiment of the present invention, in which (A) shows an exploded view and (B) shows a bolted joint in the joint structure of two steel pipe columns. [Figure 10] 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. [Figure 11] The cross-sectional structure of a bolted joint in the joint structure of the steel pipe column shown in Figure 9 is shown. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the contents of the embodiment of the present invention will be described 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 a certain drawing and an element shown in another drawing are identical or correspond to each other, the same symbol (or a symbol with a, b, etc. added after 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.

[0010] [First embodiment] The joint structure of a steel pipe pole according to one embodiment of the present invention has a structure in which a first steel pipe pole and a second steel pipe pole 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 pole will be exemplified as a type of steel pipe pole.

[0011] Fig. 1(A) shows a development view of a joint portion in a joint structure of a steel pipe pole according to this embodiment, and Fig. 1(B) shows a perspective view of the joint structure of a steel pipe pole according to this embodiment. Note that in Fig. 1(A), fastening members such as bolts and nuts are omitted.

[0012] 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, and the second steel pipe column 112 is similarly 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.

[0013] As shown in FIG. 1(A), the first steel pipe pole 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 pole 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. When the end portion recessed by the formation of the first notch 106a and the second notch 106b is used as a reference, the first protruding portion 104a and the second protruding portion 104b are provided at one end of the first steel pipe pole 102, which protrude from the recessed end portion. 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.

[0014] The second steel pipe pole 112 is provided with 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 pole 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 to the first surface 21 over a predetermined length in the material axis direction. At one end of the second steel pipe pole 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 pole 112, and the second protrusion 104b of the first steel pipe pole is provided on the fourth surface 24.

[0015] The first steel pipe column 102 has a plurality of first bolt holes 108a in the region forming the first protruding portion 104a on the first surface 11, and a plurality of second bolt holes 108b in the region adjacent to the first notch portion 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 portion 116a on the first surface 21, and a plurality of second bolt holes 118b in the region forming the first protruding portion 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, as well as the first bolt hole 118a and the second bolt hole 118b of the second steel pipe column 112, have a diameter sufficient to insert a bolt and are through holes that penetrate the steel pipe columns.

[0016] The first splice plate 130a and the second splice plate 130b are arranged on the outside of the first steel pipe pole 102 and the second steel pipe pole 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 pole 102 and the second steel pipe pole 112. The first splice plate 130a is provided with a first splice plate bolt hole 132a corresponding to the first bolt hole 108a of the first steel pipe pole 102 and the first bolt hole 118a of the second steel pipe pole 112, and the second splice plate 130b is provided with a second splice plate bolt hole 132b corresponding to the second bolt hole 108b of the first steel pipe pole 102 and the second bolt hole 118b of the second steel pipe pole 112. The support plate 140a facing the first support plate has bolt holes 142a formed therein 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, and the support plate 140b facing the second support plate has bolt holes 142b formed therein 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.

[0017] 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 protruding portion 104a on the first surface 11, and the third through hole 120c is provided adjacent to the second protruding portion 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 protruding portion 114a on the second surface 22, and the fourth through hole (not shown) is provided adjacent to the second protruding portion 114b on the fourth surface 24.

[0018] The first steel pipe column 102 is provided with 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 is provided with 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.

[0019] 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).

[0020] When the first steel pipe pole 102 and the second steel pipe pole 112 are joined, the first reinforcing plate 122a and the first splice plate 130a are provided on the same surface (the first surface 11 and the 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 apart from each other. This relationship also applies to the second reinforcing plate 122b and the second splice plate 130b.

[0021] 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, a peripheral end of the first reinforcing plate 122a is joined to the first steel pipe column 102 by welding, and a peripheral end of the second reinforcing plate 122b is joined to the second steel pipe column 112 by welding.

[0022] As shown in Fig. 1(B), the first protruding portion 104a and the second protruding portion 104b of the first steel pipe pole 102 are fitted to the first notch portion 116a and the second notch portion 116b of the second steel pipe pole 112, and the first notch portion 106a and the second notch portion 106b of the first steel pipe pole 102 are fitted to the first protruding portion 114a and the second protruding portion 114b of the second steel pipe pole 112. Then, a first splice plate 130a and a second splice plate 130b are applied from the outside, and a splice plate 140a facing the first splice plate and a 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. 1(B), bolted joints are formed on each surface of the steel pipe column (four surfaces in the case of a square steel pipe column). As shown in the figure, the first through hole 120a is disposed adjacent to the first bolted joint 100a, and the second through hole 120b is disposed adjacent to the second bolted joint 100b.

[0023] The first steel pipe pole 102, the second steel pipe pole 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. FIG. 1(A) shows a configuration in which the first splice plate 130a and the second splice plate 130b are arranged on the outer side of the first steel pipe pole 102 and the second steel pipe pole 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 inner side, sandwiching the first and second steel pipe poles from both the outer and inner sides, but if the strength of the joint portion is sufficiently maintained, the splice plate abutting the inner or outer side can be omitted.

[0024] FIG. 2 shows a front view of the joint structure of the steel pipe pole according to this embodiment. A first bolt joint 100a is formed on the first surface 11 of the first steel pipe pole 102 and the first surface 21 of the second steel pipe pole 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 abuts both the first steel pipe pole 102 and the second steel pipe pole 112. The first splice plate 130a abuts against the first steel pipe pole 102 and the second steel pipe pole 112 from the outer side, and the splice plate 140a facing the first splice plate abuts against the first steel pipe pole 102 and the second steel pipe pole 112 from the inner side, and are fastened by fasteners (bolts 150 and nuts 152). The same configuration is also applied to the second bolted joint 100b and the third bolted joint 100c.

[0025] As described with reference to Figures 1(A) and (B), the protrusions and notches of the steel pipe poles arranged above and below are arranged to fit together, so that the heights of the first bolted joint 100a and the third bolted joint 100c are arranged to be different from the height of the second bolted joint 100b. As shown in Figure 2, the second bolted joint 100b is formed at a lower position than the first bolted joint 100a and the third bolted joint 100c. A second through hole 120b and a second reinforcing plate 122b are provided on the second surface 22 of the second steel pipe pole 112 so as to be sandwiched between the first bolted joint 100a and the third bolted joint 100c and adjacent to the second bolted 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 positions of the through hole 120 and the reinforcing plate 122 are arranged so as to differ 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 force and bending stress acting on the steel pipe column.

[0026] As shown in FIG. 2, by arranging a plurality of through holes at different heights for one bolt joint (for example, the second bolt joint 100b) (for example, 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 perform the work of joining 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, by arranging the first through hole 120a and the third through hole 120c at different heights with respect to the second through hole 120b, it becomes possible to insert tools, etc. into the inside of the steel pipe column from various angles, and the degree of freedom of the work can be increased.

[0027] 3A shows a cross-sectional structure of the area sandwiched between arrows A1 and A2 in FIG. 2, and FIG. 3B shows a cross-sectional structure of the area sandwiched between arrows B1 and B2 in FIG.

[0028] As shown in FIG. 3(A), the second steel pipe pole 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 pole 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 portions where the first to fourth bolt joints 100a, 100b, 100c, 100d are formed, so that the cross-sectional areas of the first steel pipe pole 102 and the second steel pipe pole 112 become relatively smaller than other portions. As a result, there is a concern that the strength of the steel pipe pole will decrease. In order to prevent the strength of steel pipe columns from decreasing, it is possible to reduce the number of through holes or to make the diameter of the through holes smaller, but such measures would reduce workability.

[0029] 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 corresponding to the second through hole 120b, and a fourth reinforcing plate 122d corresponding to the fourth through hole 120d. Then, as shown in Fig. 3(B), the first steel pipe column 102 is provided with a first reinforcing plate 122a corresponding to the first through hole 120a, and a third reinforcing plate 122c corresponding to the third through hole 120c. With this configuration, it is 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.

[0030] 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 pole 102 and the second steel pipe pole 112. In order to compensate for the reduction in strength caused by providing a through hole in the steel pipe pole, the cross-sectional area of ​​the reinforcing plate and the cross-sectional area of ​​the steel pipe pole provided with the through hole may be set so as to satisfy the relationship shown in formula (1). [Cross-sectional area of ​​the reinforcing plate] ≥ [Cross-sectional area of ​​the through hole of the steel pipe column with a 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.

[0031] 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 holes)] ≦ [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).

[0032] The first to fourth reinforcing plates 122a, 122b, 122c, and 122d may be joined to the inner side surfaces of the first steel pipe pole 102 and the second steel pipe pole 112, respectively, or may be provided on both sides of the outer side surface and the inner side surface. 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 pole 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 pole 112 by welding, thereby obtaining an effect substantially similar to that of increasing the wall thickness of each steel pipe pole. That is, by providing reinforcing plates so as to surround the periphery of the through hole provided in the steel pipe pole, 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.

[0033] The first opening 124a provided in the first reinforcing plate 122a has a diameter that is substantially the same as or larger than that of 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).

[0034] 1(A) and (B) show an example in which one through hole is provided on each surface of the steel pipe pole, but an embodiment of the present invention is not limited to such an example, and multiple through holes can be provided on each surface of the steel pipe pole. Even in such a case, a decrease in the strength (rigidity) of the steel pipe pole can be prevented by providing reinforcing plates corresponding to each of the multiple through holes.

[0035] Thus, according to this embodiment, when the first steel pipe column 102 and the second steel pipe column 112 are joined, the workability of the bolt joint can be improved by providing a through hole in each steel pipe column, and the reduction in strength of the joint portion can be suppressed by providing a reinforcing plate having an opening in accordance with the through hole, and a strength equal to or greater than that of the other portion of the steel pipe column can be obtained. Note that, although this embodiment shows a joint structure of 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.

[0036] [Second embodiment] This embodiment shows an aspect in which the configuration of the reinforcing plate is different from that of the first embodiment. The following description will focus on the differences from the first embodiment.

[0037] Fig. 4 shows a front view of the joint structure of a steel pipe pole 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. On the other hand, as shown in Fig. 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.

[0038] Specifically, the length L2 of the second reinforcing plate 122b (the length in the material axis direction of the second steel pipe pole) is such that the end ED2 (the end of one side intersecting with the material axis direction of the second steel pipe pole 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 pole 112 (the ends of the bolt holes located at the farthest positions 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 pole 112. Note that the length k2 can be defined as the distance from the end of the bolt hole located at the farthest position 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.

[0039] In the second steel pipe pole 112, in addition to the second through hole 120b formed on the second surface 22, a plurality of first bolt holes 118a and third bolt holes 118c are formed on the first surface 21 and the third surface 23. Therefore, the effective cross-sectional area of ​​the second steel pipe pole 112 is reduced, and there is a concern that the strength of the joint portion may decrease. However, by arranging 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 pole 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 of the adjacent surface is provided can also be compensated for.

[0040] This is also true for the first steel pipe pole 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 pole 102. The length L1 (length in the material axis direction of the first steel pipe pole) 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 pole 102) protrudes outward by a length k1 from the end of the second bolt hole 108b of the first steel pipe pole 102. This makes it possible to compensate for the strength of the portion where the first through hole 120a is provided, and also to compensate 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. In addition, the 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, as shown in Figure 4.

[0041] On the other hand, the second reinforcing plate 122b and the second attachment plate 130b may be arranged so that their opposing ends are in contact with each other, or may be arranged to be spaced apart from each other. This relationship also applies to the first reinforcing plate 122a and the first attachment plate 130a, and the third reinforcing plate 122c and the third attachment plate 130c.

[0042] The length by which the reinforcing plate protrudes from the splice plate can be set arbitrarily. Although not shown, the same effect can be obtained even if the end of the reinforcing plate and the end of the splice 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 have high resistance 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 (similarly for the third reinforcing plate 122c and the fourth reinforcing plate).

[0043] The joint structure of the steel pipe pole 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 pole of this embodiment not only exhibits the same effects as those of the first embodiment, but also compensates for the reduction in strength caused by the formation of the bolt holes.

[0044] [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.

[0045] Fig. 5(A) shows a development view of the joint part of the steel pipe pole according to this embodiment, and Fig. 5(B) shows a perspective view of the joint part of the steel pipe pole. Fig. 6(A) and Fig. 6(B) show the cross-sectional structures of the C1 part and the C2 part shown in Fig. 5(B). Note that in Fig. 5(A), fasteners such as bolts and nuts are omitted.

[0046] As shown in FIG. 5(A), the first steel pipe column 102 has a first cutout 106a and a second cutout 106b on the second surface 12 and the third surface 13, and when the end portion set back by these cutouts is used as a reference, a first protrusion 104a and a second protrusion 104b protruding from the setback end are provided on the first surface 11 and the fourth surface 14. The second steel pipe column 112 has a first cutout 116a and a second cutout 116b on the first surface 21 and the fourth surface 24, and when the end portion set back by these cutouts is used as a reference, a first protrusion 114a and a second protrusion 114b protruding from the setback 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 so as to cut out two consecutive sides of the first steel pipe column 102, and the first notch portion 116a and the second notch portion 116b are formed so as to cut out two consecutive sides of the second steel pipe column 112.

[0047] The first notch 106a and the second notch 106b of the first steel pipe pole 102 are fitted to the first protruding portion 114a and the second protruding portion 114b of the second steel pipe pole 112, and the first protruding portion 104a and the second protruding portion 104b of the first steel pipe pole 102 are fitted to the first notch 116a and the second notch 116b of the second steel pipe pole 112. Then, a first splice plate 130a and a second splice plate 130b are attached from the outside, and a splice plate 140a facing the first splice plate and a 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. 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.

[0048] 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 provided on the first surface 11 in alignment with the position of the first through hole 120a, and a second reinforcing plate 122d provided on the fourth surface 14 in alignment with the position of the fourth through hole 120d.

[0049] As shown in Figures 6(A) and (B), a through hole can be provided on each surface of the steel pipe pole by providing a notch portion on two adjacent surfaces of the steel pipe pole (in other words, providing a protrusion portion on two adjacent surfaces). Even in this case, through holes of different heights (a first through hole 120a, a second through hole 120b) can be provided on adjacent surfaces of the steel pipe pole as shown in Figure 5(B).

[0050] In this way, by arranging a plurality of through holes 120 with different heights for one bolt joint 100, the worker can easily perform the work of joining the first steel pipe pole 102 and the second steel pipe pole 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 the first bolt joint 100a and the second bolt joint 100b extending in the vertical direction are fastened with bolts. For example, when fastening the first bolt joint 100a with a bolt, the worker can insert a tool or the like not only through the first through hole 120a but also through the second through hole 120b to perform the work.

[0051] In this embodiment as well, when the first steel pipe pole 102 and the second steel pipe pole 112 are joined, the workability of the bolt joint can be improved by providing a through hole in each steel pipe pole. Furthermore, by providing a reinforcing plate in accordance with the through hole, the decrease in strength of the joint portion can be suppressed, and the strength can be equal to or greater than that of the other portions of the steel pipe pole. This embodiment can be implemented by appropriately incorporating the configuration of the second embodiment.

[0052] [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.

[0053] Fig. 7(A) shows a development view of the joint part of the steel pipe pole according to this embodiment, and Fig. 7(B) shows a perspective view of the joint part of the steel pipe pole. Fig. 8(A) and Fig. 8(B) show the cross-sectional structures of the D1 part and the D2 part shown in Fig. 7(B). Note that in Fig. 7(A), fasteners such as bolts and nuts are omitted.

[0054] Figure 7(A) shows a configuration in which the configuration of the cutout portion is different from that of Figure 1(A) and Figure 5(A). The configuration shown in Figure 7(A) shows an embodiment in which three faces (second face 12, third face 13, fourth face 14) of the first steel pipe column 102 are cut out, and a first cutout portion 116a is provided on the first face 21 of the second steel pipe column 112. The first steel pipe column 102 is provided with a first protruding portion 104a on the first face 11, and the second steel pipe column 112 is provided with a second protruding portion 114b on the second face 22, a third protruding portion 114c on the third face 23, and a fourth protruding portion 114d on the fourth face 24.

[0055] As shown in FIG. 7(B), the first protruding portion 104a of the first steel pipe pole 102 and the first notch portion 116a of the second steel pipe pole 112 are arranged to mesh with each other. In the first steel pipe pole 102 and the second steel pipe pole 112, even if a notch portion is provided on one surface (or a part) of one steel pipe pole and a protruding portion is provided on the corresponding surface of the other steel pipe pole as described above, the first bolted joint portion 100a, the second bolted joint portion 100b, the third bolted joint portion 100c, and the fourth bolted joint portion 100d can be arranged in an oblique shape. 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.

[0056] Thus, in this embodiment as well, when joining the first steel pipe pole 102 and the second steel pipe pole 112, the workability of the bolt joint can be improved by providing a through hole 120 in each steel pipe pole. 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 other portions of the steel pipe pole can be obtained. Note that this embodiment can be implemented by appropriately incorporating the configuration of the second embodiment.

[0057] [Fifth embodiment] This embodiment shows an example in which a third reinforcing plate is further provided in the joint structure of a steel pipe column shown in the first embodiment. In the following, the differences from the first embodiment will be mainly described.

[0058] Fig. 9(A) shows a development view of a joint portion in a joint structure of a steel pipe pole according to this embodiment, and Fig. 9(B) shows a perspective view of the joint structure of a steel pipe pole according to this embodiment. Note that in Fig. 9(A), fastening members such as bolts and nuts are omitted.

[0059] As shown in FIG. 9(A), the first inner reinforcing plate 160a is provided on the inside of the first steel pipe pole 102. The first inner reinforcing plate 160a is erected in a direction parallel to the material axis direction of the first steel pipe pole 102 and 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. In the second steel pipe pole 112, a second inner reinforcing plate 160b is similarly provided.

[0060] 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 arranged to be stored inside the steel pipe column.

[0061] FIG. 10 shows a front view of the joint structure of the steel pipe pole according to this embodiment. A first inner reinforcing plate 160a is provided on the inside of the first steel pipe pole 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 pole. 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 pole 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 pole 102 can be supplemented.

[0062] 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, and may have a semicircular shape having a diameter substantially the same as that of the first through hole 120a and the third through hole 120c, for example. 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 in the second steel pipe column 112 has a similar configuration to the first inner reinforcing plate 160a provided in the first steel pipe column 102.

[0063] 11(A) shows the cross-sectional structure of the area between arrows E1 and E2 in FIG. 10, and FIG. 11(B) shows the cross-sectional structure of the area between arrows F1 and F2 in FIG.

[0064] 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 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.

[0065] As shown in Figures 11(A) and (B), in a steel pipe pole, 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 making it possible to compensate for the decrease in strength (rigidity) caused by the provision of the through holes. The other configurations of the steel pipe pole according to this embodiment are the same as those according to the first embodiment, and the same effects can be achieved. Note that this embodiment can be implemented by appropriately incorporating the configurations of the second and third embodiments. [Explanation of symbols]

[0066] 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 the first steel pipe column), 104b: second protrusion (of the first steel pipe column), 106a: first notch (of the first steel pipe column), 106b: second notch (of the first steel pipe column), 108a: first bolt hole (of the first steel pipe column), 108b: second bolt (of the 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... 3rd 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 a splice plate, 132a...bolt hole of first splice plate, 132b...bolt hole of second splice plate, 140a...splice plate opposite to the first splice plate, 140b...splice plate opposite to the second splice plate, 140c...splice plate opposite to the third splice plate, 142a...bolt hole of splice plate opposite to the first splice plate, 142b...bolt hole of splice plate opposite to the second splice plate, 150...bolt, 152...nut, 160a...first inner reinforcing plate, 160b...second inner reinforcing plate, 162a...recess, 162b...recess

Claims

1. 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. An end of the first reinforcing plate is disposed so as to contact an end of the first splice plate, and an end of the second reinforcing plate is disposed so as to contact an end of the second splice plate. A joint structure for a steel pipe column according to claim 1.

3. The first reinforcing plate is disposed at a distance from the first support plate, and the second reinforcing plate is disposed at a distance from the second support plate. A joint structure for a steel pipe column according to claim 1.

4. 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. A joint structure for a steel pipe column according to any one of claims 1 to 3.

5. The first reinforcing plate is welded to an inner side surface of the first steel pipe pole, and the second reinforcing plate is welded to an outer side surface of the second steel pipe pole. A joint structure for a steel pipe column according to any one of claims 1 to 3.

6. The first through hole and the second through hole have different heights in the material axis direction of the first steel pipe column and the second steel pipe column. A joint structure for a steel pipe column according to any one of claims 1 to 5.

7. 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 notch portion 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 portion of the second steel pipe pole are arranged to interlock with each other. A joint structure for a steel pipe column according to any one of claims 1 to 6.

8. The first steel pipe column and the second steel pipe column have a rectangular cross-sectional shape. A joint structure for a steel pipe column according to any one of claims 1 to 7.

9. 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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