Connection structure of steel material and building

Abstract

To provide a connection structure of steel material and a building hardly generating local buckling of a column.SOLUTION: A connection structure 10 of steel material comprises: a steel beam 12 extending along a horizontal direction; a steel column 13 extending along a vertical direction; a connection member 16; and a spacer 17. The beam 12 has a beam web 20, a first beam flange 21, and a second beam flange. The column 13 had a column web 30, a first column flange 31, and a second column flange 32. The connection member 16 connects the first beam flange 21 and the column 13. The spacer 17 is placed between the connection member 16 and the first beam flange 21. A first main gap G11 is provided between the first beam flange 21 and the first column flange 31. A second main gap G12 is provided between the first beam flange 21 and the second column flange 32.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a connection structure of steel materials and a building.

Background Art

[0002] In Patent Document 1, a steel cross member and a steel column are connected by a connecting member. The cross member is, for example, a beam. The beam is composed of, for example, an H-shaped steel. The column is composed of an H-shaped steel. The connecting member is, for example, a split tee. The split tee has a bottom piece portion extending in the horizontal direction and a standing piece portion extending in the vertical direction. The split tee connects the beam and the column in a state where the entire bottom piece portion contacts the flange of the beam and the entire standing piece portion contacts the flange of the column.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Due to an earthquake or the like, the column may undergo local buckling. When the column undergoes local buckling, the load-bearing capacity of the column rapidly decreases, which is not preferable.

Means for Solving the Problems

[0005] (1) The steel connection structure for solving the above problems includes a horizontal girder web, a first horizontal girder flange, and a second horizontal girder flange, and a steel horizontal girder extending along the horizontal direction, a column web, a first column flange, and a second column flange, and a steel column extending along the vertical direction, a connecting member connecting the first horizontal girder flange and the column, and a spacer disposed between the connecting member and the first horizontal girder flange. A first main gap is provided between the first horizontal girder flange and the first column flange, and a second main gap is provided between the first horizontal girder flange and the second column flange.

[0006] According to this configuration, the first main gap and the second main gap make it difficult for a load to be applied to the column. In addition, the connecting member becomes fully plastic before the column. Therefore, it becomes difficult for the column to undergo local buckling.

[0007] (2) In the connection structure of the steel material as described in (1) above, the connection member includes a first vertical portion extending along a first inner surface which is the inner surface of the first column flange and is located on one side of the column web, and a first horizontal portion orthogonal to the first vertical portion and extending along the first cross-member flange, which is a first angle; a second vertical portion extending along a second inner surface which is the inner surface of the first column flange and is located on the other side of the column web, and a second horizontal portion orthogonal to the second vertical portion and extending along the first cross-member flange, which is a second angle; a third vertical portion extending along a third inner surface which is the inner surface of the second column flange and is located on one side of the column web, and a third horizontal portion orthogonal to the third vertical portion and extending along the first cross-member flange, which is a third angle; a fourth vertical portion extending along a fourth inner surface which is the inner surface of the second column flange and is located on the other side of the column web, and a fourth horizontal portion orthogonal to the fourth vertical portion and extending along the first cross-member flange, which is a fourth angle; a fifth vertical portion extending along a first outer surface of the first column flange, and a fifth horizontal portion orthogonal to the fifth vertical portion and extending along the first cross-member flange, which is a fifth angle; a sixth vertical portion extending along a second outer surface of the second column flange, and a sixth horizontal portion orthogonal to the sixth vertical portion and extending along the first cross-member flange, which is a sixth angle. According to this configuration, each L-shaped angle can deform in a ductile manner. Therefore, it is possible to avoid a sudden decrease in the load-bearing capacity when the angle deforms.

[0008] (3) In the connection structure of the steel material as described in (1) above, the connection member is a plate member to which the end portion in the extending direction of the column is welded, and a pair of slits are provided in the connection member on both sides of the column web in the thickness direction of the column web and extending along the column web.

[0009] According to this configuration, due to the pair of slits, the portion located inside the pair of slits in the connecting member, that is, the portion where the column web is welded, and the portion located outside the pair of slits in the connecting member are separated. Therefore, it becomes difficult for a load to be applied to the column web. Thus, the deformation of the column can be more effectively suppressed. Furthermore, compared with the case where the connecting member has a plurality of angles, the number of parts of the connecting member is reduced. Therefore, the construction becomes easier and the cost can be reduced.

[0010] (4) In the connection structure of any one of the steel materials described in (1) to (3) above, the connecting member includes a first connection portion located between the first column flange and the second column flange in the extending direction of the transverse member, a second connection portion located on the side opposite to the column web with the first column flange interposed therebetween in the extending direction of the transverse member, and a third connection portion located on the side opposite to the column web with the second column flange interposed therebetween in the extending direction of the transverse member. The spacer includes a first spacer member disposed between the first connection portion and the first transverse member flange, a second spacer member disposed between the second connection portion and the first transverse member flange, and a third spacer member disposed between the third connection portion and the first transverse member flange. Between the first connection portion and the first transverse member flange, a first sub-gap communicating with the first main gap and a second sub-gap communicating with the second main gap are provided. Between the second connection portion and the first transverse member flange, a third sub-gap communicating with the first main gap is provided. Between the third connection portion and the first transverse member flange, a fourth sub-gap communicating with the second main gap is provided.

[0011] According to this configuration, the first sub-gap and the second sub-gap function as spaces for the first connection portion to deform when a load is applied to the connecting member. The third sub-gap functions as a space for the second connection portion to deform when a load is applied to the connecting member. The fourth sub-gap functions as a space for the third connection portion to deform when a load is applied to the connecting member. Therefore, the connecting member is more likely to deform.

[0012] (5) In the connection structure of any one of the steel materials (1) to (4) above, the cross member further has a stiffener provided on the web of the cross member and connecting the first cross member flange and the second cross member flange. According to this configuration, since the beam is reinforced by the stiffener, deformation of the first beam flange and the second beam flange can be suppressed.

[0013] (6) In the connection structure of the steel material (5) above, the cross member has a first stiffener as the stiffener overlapping the first column flange in the vertical direction and a second stiffener as the stiffener overlapping the second column flange in the vertical direction.

[0014] According to this configuration, among the first beam flange and the second beam flange, the portion overlapping the first column flange in the vertical direction, which is a portion where load is particularly likely to be applied, is reinforced by the first stiffener. Also, among the first beam flange and the second beam flange, the portion overlapping the second column flange in the vertical direction, which is a portion where load is particularly likely to be applied, is reinforced by the second stiffener. Therefore, deformation of the first beam flange and the second beam flange can be more effectively suppressed.

[0015] (7) The building that solves the above problems has a connection structure of any one of the steel materials (1) to (6) above. According to this configuration, due to the first main gap and the second main gap, it becomes difficult for load to be applied to the column. Also, the connecting member becomes fully plastic before the column. Therefore, it becomes difficult for the column to undergo local buckling.

[0016] (8) In the building of (7) above, a first body structure having a first column and a first beam, and a second body structure having a second column and a second beam and provided on the first body structure are provided. The first body structure has a column-win ramen structure in which the first column is passed through preferentially to the first beam at a portion where the first column and the first beam intersect. The second body structure has a beam-win ramen structure in which the second beam is passed through preferentially to the second column at a portion where the second column and the second beam intersect. The cross member is the first beam, and the column is the second column.

[0017] When a second body structure with a beam-win ramen structure is provided on a first body structure with a column-win ramen structure, when a load is applied to the building from the ground due to an earthquake or the like, a relatively large load may be applied to the connection portion between the beam of the first body structure and the column of the second body structure compared to the connection portions of other parts. Therefore, it is particularly effective to make the column less likely to undergo local buckling at the connection portion between the beam of the first body structure and the column of the second body structure.

Effect of the Invention

[0018] According to the steel connection structure and the building of the present invention, the column is less likely to undergo local buckling.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Mode for Carrying Out the Invention

[0020] <First Embodiment> With reference to FIGS. 1 to 8, the connection structure 10 of steel materials and the building 100 of the first embodiment will be described. Examples of the building 100 include a detached house, an apartment house, a commercial facility, and a public facility.

[0021] The building 100 has a first body structure 101 and a second body structure 102. The second body structure 102 is provided on the first body structure 101. In this embodiment, the first floor of the building 100 is constituted by the first body structure 101. The second floor and above of the building 100 are constituted by the second body structure 102.

[0022] The first body structure 101 of this embodiment includes a plurality of first columns 11 extending along the vertical direction and a first beam 12 as a horizontal member extending along the horizontal direction. The first body structure 101 may further include girders as horizontal members. The first columns 11 extend vertically upward from the base portion 103. The base portion 103 has a foundation. At the intersection of the first column 11 and the first beam 12, the first column 11 is passed through prior to the first beam 12. The first beam 12 is located between adjacent first columns 11. The first column 11 and the first beam 12 are joined. The first body structure 101 of this embodiment has a column-priority ramen structure.

[0023] The second body structure 102 of this embodiment includes one or more second columns 13 extending along the vertical direction, one or more support columns 14 extending along the vertical direction, and a second beam 15 as a horizontal member extending along the horizontal direction. The second body structure 102 may further include girders as horizontal members. The second columns 13 are provided at positions that do not overlap with the first columns 11 in the vertical direction. On the other hand, the support columns 14 may be provided at positions that overlap with the first columns 11 in the vertical direction. The support columns 14 are composed of, for example, square pipes. At the intersection of the second column 13 and the second beam 15, the second beam 15 is passed through prior to the second column 13. The second beam 15 is placed on the second column 13. The second column 13 and the second beam 15 are joined. The second body structure 102 has a beam-priority ramen structure.

[0024] In this embodiment, the steel connection structure 10 is applied to the connection between the first beam 12 of the first body structure 101 and the second column 13 of the second body structure 102. Hereinafter, the "first beam 12" will be simply referred to as "beam 12". Also, the "second column 13" will be simply referred to as "column 13".

[0025] <Steel connection structure> As shown in FIG. 2, the steel connection structure 10 includes a beam 12, a column 13, a connecting member 16 that connects the beam 12 and the column 13, and a spacer 17 disposed between the beam 12 and the connecting member 16.

[0026] The beam 12 is composed of an H-shaped steel. The beam 12 has a beam web 20 as a transverse member web, a first beam flange 21 as a first transverse member flange, and a second beam flange 22 as a second transverse member flange. The beam web 20, the first beam flange 21, and the second beam flange 22 are each in a flat plate shape. The first beam flange 21 is provided at a first end in the width direction of the beam web 20. The second beam flange 22 is provided at a second end in the width direction of the beam web 20. The first beam flange 21 and the second beam flange 22 face each other in the vertical direction. The first beam flange 21 is located above the beam web 20. The second beam flange 22 is located below the beam web 20.

[0027] As shown in FIG. 3, the first beam flange 21 is provided with beam flange through holes 21h. The beam flange through holes 21h are provided at four locations at intervals in the extending direction of the beam 12 in a portion of the first beam flange 21 located on one side of the beam web 20. Also, the beam flange through holes 21h are provided at four locations at intervals in the extending direction of the beam 12 in a portion of the first beam flange 21 located on the other side of the beam web 20.

[0028] The beam 12 of the present embodiment further has a plurality of stiffeners 23. Each stiffener 23 is provided on the beam web 20. Each stiffener 23 connects the first beam flange 21 and the second beam flange 22.

[0029] As shown in FIG. 4, the column 13 is composed of an H-shaped steel. The column 13 has a column web 30, a first column flange 31, and a second column flange 32. The column web 30, the first column flange 31, and the second column flange 32 are each in a flat plate shape. The first column flange 31 is provided at a first end in the width direction of the column web 30. The second column flange 32 is provided at a second end in the width direction of the column web 30. The first column flange 31 and the second column flange 32 face each other in the extending direction of the beam 12. In the present embodiment, the cross section of the column 13 is smaller than the cross section of the beam 12.

[0030] The first column flange 31 has a first outer surface 31a, a first inner surface 31b, and a second inner surface 31c. The first inner surface 31b is the inner surface of the first column flange 31 and is located on one side of the column web 30. The second inner surface 31c is the inner surface of the first column flange 31 and is located on the other side of the column web 30.

[0031] The second column flange 32 has a second outer surface 32a, a third inner surface 32b, and a fourth inner surface 32c. The third inner surface 32b is the inner surface of the second column flange 32 and is located on one side of the column web 30. The fourth inner surface 32c is the inner surface of the second column flange 32 and is located on the other side of the column web 30.

[0032] The first inner surface 31b of the first column flange 31 faces the third inner surface 32b of the second column flange 32. The second inner surface 31c of the first column flange 31 faces the fourth inner surface 32c of the second column flange 32.

[0033] The first column flange 31 is provided with first column flange through holes 31h. Three first column flange through holes 31h are provided at intervals in the extending direction of the column 13 in a portion of the first column flange 31 located on one side of the column web 30. Also, three first column flange through holes 31h are provided at intervals in the extending direction of the column 13 in a portion of the first column flange 31 located on the other side of the column web 30.

[0034] The second column flange 32 is provided with second column flange through holes 32h. Three second column flange through holes 32h are provided at intervals in the extending direction of the column 13 in a portion of the second column flange 32 located on one side of the column web 30. Also, three second column flange through holes 32h are provided at intervals in the extending direction of the column 13 in a portion of the second column flange 32 located on the other side of the column web 30.

[0035] <Connecting member> The connecting member 16 has a first connecting portion 61, a second connecting portion 62, and a third connecting portion 63. The first connecting portion 61 is located between the first column flange 31 and the second column flange 32 in the extending direction of the beam 12. The second connecting portion 62 is located on the side opposite to the column web 30 with the first column flange 31 interposed therebetween in the extending direction of the beam 12. The third connecting portion 63 is located on the side opposite to the column web 30 with the second column flange 32 interposed therebetween in the extending direction of the beam 12.

[0036] The connecting member 16 of the present embodiment has L-shaped first to sixth angles 41 to 46. The first to fourth angles 41 to 44 are located between the first column flange 31 and the second column flange 32 in the extending direction of the beam 12. That is, the first to fourth angles 41 to 44 constitute the first connecting portion 61. The fifth angle 45 is located on the side opposite to the column web 30 with the first column flange 31 interposed therebetween in the extending direction of the beam 12. That is, the fifth angle 45 constitutes the second connecting portion 62. The sixth angle 46 is located on the side opposite to the column web 30 with the second column flange 32 interposed therebetween in the extending direction of the beam 12. That is, the sixth angle 46 constitutes the third connecting portion 63. The fifth angle 45 and the sixth angle 46 are each wider than each of the first to fourth angles 41 to 44.

[0037] As shown in FIG. 3, the first angle 41 has a first vertical portion 411 and a first horizontal portion 412 perpendicular to the first vertical portion 411. The first angle 41 is arranged such that the first vertical portion 411 is along the first inner surface 31b of the first column flange 31 and the first horizontal portion 412 is along the outer surface 21a of the first beam flange 21. The first vertical portion 411 extends in the extending direction of the column 13. The first horizontal portion 412 extends in the extending direction of the beam 12. The first angle 41 is provided with a first angle through-hole 41h. Three first angle through-holes 41h are provided at intervals in the extending direction of the column 13 in the first vertical portion 411. The first angle through-hole 41h is also provided in the first horizontal portion 412.

[0038] As shown in FIGS. 4 and 5, the second angle 42 has a second vertical portion 421 and a second horizontal portion 422 perpendicular to the second vertical portion 421. The second angle 42 is arranged such that the second vertical portion 421 is along the second inner surface 31c of the first column flange 31 and the second horizontal portion 422 is along the outer surface 21a of the first beam flange 21. The second vertical portion 421 extends in the extending direction of the column 13. The second horizontal portion 422 extends in the extending direction of the beam 12. The second angle 42 is provided with a second angle through hole 42h. Three second angle through holes 42h are provided at intervals in the extending direction of the column 13 in the second vertical portion 421. The second angle through hole 42h is also provided in the second horizontal portion 422.

[0039] As shown in FIG. 3, the third angle 43 has a third vertical portion 431 and a third horizontal portion 432 perpendicular to the third vertical portion 431. The third angle 43 is arranged such that the third vertical portion 431 is along the third inner surface 32b of the second column flange 32 and the third horizontal portion 432 is along the outer surface 21a of the first beam flange 21. The third vertical portion 431 extends in the extending direction of the column 13. The third horizontal portion 432 extends in the extending direction of the beam 12. The third angle 43 is provided with a third angle through hole 43h. Three third angle through holes 43h are provided at intervals in the extending direction of the column 13 in the third vertical portion 431. The third angle through hole 43h is also provided in the third horizontal portion 432.

[0040] As shown in FIGS. 4 and 6, the fourth angle 44 has a fourth vertical portion 441 and a fourth horizontal portion 442 perpendicular to the fourth vertical portion 441. The fourth angle 44 is arranged such that the fourth vertical portion 441 is along the fourth inner surface 32c of the second column flange 32 and the fourth horizontal portion 442 is along the outer surface 21a of the first beam flange 21. The fourth vertical portion 441 extends in the extending direction of the column 13. The fourth horizontal portion 442 extends in the extending direction of the beam 12. The fourth angle 44 is provided with a fourth angle through hole 44h. Three fourth angle through holes 44h are provided at intervals in the extending direction of the column 13 in the fourth vertical portion 441. The fourth angle through hole 44h is also provided in the fourth horizontal portion 442.

[0041] As shown in FIG. 3, the fifth angle 45 has a fifth vertical portion 451 and a fifth horizontal portion 452 perpendicular to the fifth vertical portion 451. The fifth angle 45 is arranged such that the fifth vertical portion 451 is along the first outer surface 31a of the first column flange 31 and the fifth horizontal portion 452 is along the outer surface 21a of the first beam flange 21. The fifth vertical portion 451 extends in the extending direction of the column 13. The fifth horizontal portion 452 extends in the extending direction of the beam 12.

[0042] The fifth angle 45 is provided with fifth angle through-holes 45h. The fifth angle through-holes 45h are provided in three at intervals in the extending direction of the column 13 in a portion of the fifth vertical portion 451 located on one side of the column web 30. Also, the fifth angle through-holes 45h are provided in three at intervals in the extending direction of the column 13 in a portion of the fifth vertical portion 451 located on the other side of the column web 30.

[0043] As shown in FIG. 7, the fifth angle through-holes 45h are also provided in the fifth horizontal portion 452. The fifth angle through-holes 45h are provided one by one in portions of the fifth horizontal portion 452 located on both sides of the beam web 20.

[0044] As shown in FIG. 3, the sixth angle 46 has a sixth vertical portion 461 and a sixth horizontal portion 462 perpendicular to the sixth vertical portion 461. The sixth angle 46 is arranged such that the sixth vertical portion 461 is along the second outer surface 32a of the second column flange 32 and the sixth horizontal portion 462 is along the outer surface 21a of the first beam flange 21. The sixth vertical portion 461 extends in the extending direction of the column 13. The sixth horizontal portion 462 extends in the extending direction of the beam 12.

[0045] The sixth angle 46 is provided with a sixth angle through-hole 46h. The sixth angle through-hole 46h is provided in three numbers at intervals in the extending direction of the column 13 in a portion located on one side of the column web 30 in the sixth vertical portion 461. Further, the sixth angle through-hole 46h is provided in three numbers at intervals in the extending direction of the column 13 in a portion located on the other side of the column web 30 in the sixth vertical portion 461.

[0046] As shown in FIG. 8, the sixth angle through-hole 46h is also provided in the sixth horizontal portion 462. The sixth angle through-hole 46h is provided one by one in portions located on both sides of the beam web 20 in the sixth horizontal portion 462.

[0047] As shown in FIG. 4, a portion of the first column flange 31 located on one side of the column web 30 is sandwiched between the first vertical portion 411 of the first angle 41 and the fifth vertical portion 451 of the fifth angle 45. The first angle 41, the first column flange 31, and the fifth angle 45 are clamped together by screwing a high-strength bolt B inserted through the first angle through-hole 41h, the first column flange through-hole 31h, and the fifth angle through-hole 45h into a nut N.

[0048] A portion of the first column flange 31 located on the other side of the column web 30 is sandwiched between the second vertical portion 421 of the second angle 42 and the fifth vertical portion 451 of the fifth angle 45. The second angle 42, the first column flange 31, and the fifth angle 45 are clamped together by screwing a high-strength bolt B inserted through the second angle through-hole 42h, the first column flange through-hole 31h, and the fifth angle through-hole 45h into a nut N.

[0049] The portion of the second column flange 32 located on one side of the column web 30 is sandwiched between the third longitudinal portion 431 of the third angle 43 and the sixth longitudinal portion 461 of the sixth angle 46. The third angle 43, the second column flange 32, and the sixth angle 46 are clamped together by screwing a high-strength bolt B inserted through the third angle through-hole 43h, the second column flange through-hole 32h, and the sixth angle through-hole 46h into a nut N.

[0050] The portion of the second column flange 32 located on the other side of the column web 30 is sandwiched between the fourth longitudinal portion 441 of the fourth angle 44 and the sixth longitudinal portion 461 of the sixth angle 46. The fourth angle 44, the second column flange 32, and the sixth angle 46 are clamped together by screwing a high-strength bolt B inserted through the fourth angle through-hole 44h, the second column flange through-hole 32h, and the sixth angle through-hole 46h into a nut N.

[0051] In this way, the first angle 41, the second angle 42, and the fifth angle 45 are fixed to the first column flange 31. The third angle 43, the fourth angle 44, and the sixth angle 46 are fixed to the second column flange 32. Therefore, the connecting member 16 is fixed to the column 13.

[0052] As shown in FIG. 3, in the present embodiment, the lower end surface 13a of the column 13 is located above the surface facing the outer surface 21a of the first beam flange 21 in the first to sixth angles 41 to 46.

[0053] <Spacer> The spacer 17 has first to third spacer members 71 to 73. The first spacer member 71 is disposed between the first connection portion 61 of the connecting member 16 and the first beam flange 21. The second spacer member 72 is disposed between the second connection portion 62 of the connecting member 16 and the first beam flange 21. The third spacer member 73 is disposed between the third connection portion 63 of the connecting member 16 and the first beam flange 21.

[0054] As shown in FIG. 4, in the present embodiment, the first spacer member 71 is a rectangular plate member. The second spacer member 72 and the third spacer member 73 are each a rectangular plate member.

[0055] As shown in FIGS. 5 and 6, the first spacer member 71 is provided with a first spacer through hole 71h. The first spacer through hole 71h is provided at each corner of the first spacer member 71.

[0056] The first spacer member 71 is disposed between the first horizontal portion 412 of the first angle 41, the second horizontal portion 422 of the second angle 42, the third horizontal portion 432 of the third angle 43, and the fourth horizontal portion 442 of the fourth angle 44, and the first beam flange 21.

[0057] As shown in FIGS. 3 and 4, the first spacer member 71 is disposed between the portion of the first horizontal portion 412 and the second horizontal portion 422 that is away from the first column flange 31 in the extending direction of the beam 12 and the first beam flange 21. The first spacer member 71 is not disposed between the portion of the first horizontal portion 412 and the second horizontal portion 422 that is close to the first column flange 31 in the extending direction of the beam 12 and the first beam flange 21.

[0058] The first spacer member 71 is disposed between the portion of the third horizontal portion 432 and the fourth horizontal portion 442 that is away from the second column flange 32 in the extending direction of the beam 12 and the first beam flange 21. The first spacer member 71 is not disposed between the portion of the third horizontal portion 432 and the fourth horizontal portion 442 that is close to the second column flange 32 in the extending direction of the beam 12 and the first beam flange 21.

[0059] As shown in FIG. 5, the first angle 41, the first spacer member 71, and the first beam flange 21 are clamped together by screwing a high-strength bolt B inserted through the first angle through hole 41h, the first spacer through hole 71h, and the beam flange through hole 21h into a nut N. Thereby, the first angle 41 is fixed to the first beam flange 21 via the first spacer member 71.

[0060] The second angle 42, the first spacer member 71, and the first beam flange 21 are clamped together by screwing a high-strength bolt B inserted through a second angle through-hole 42h, a first spacer through-hole 71h, and a beam flange through-hole 21h into a nut N. Thereby, the second angle 42 is fixed to the first beam flange 21 via the first spacer member 71.

[0061] As shown in FIG. 6, the third angle 43, the first spacer member 71, and the first beam flange 21 are clamped together by screwing a high-strength bolt B inserted through a third angle through-hole 43h, a first spacer through-hole 71h, and a beam flange through-hole 21h into a nut N. Thereby, the third angle 43 is fixed to the first beam flange 21 via the first spacer member 71.

[0062] The fourth angle 44, the first spacer member 71, and the first beam flange 21 are clamped together by screwing a high-strength bolt B inserted through a fourth angle through-hole 44h, a first spacer through-hole 71h, and a beam flange through-hole 21h into a nut N. Thereby, the fourth angle 44 is fixed to the first beam flange 21 via the first spacer member 71. Therefore, the first connection portion 61 is fixed to the beam 12 via the first spacer member 71.

[0063] As shown in FIG. 7, two second spacer through-holes 72h are provided in the second spacer member 72. The two second spacer through-holes 72h are arranged at intervals in the longitudinal direction of the second spacer member 72.

[0064] The second spacer member 72 is disposed between the fifth horizontal portion 452 of the fifth angle 45 and the first beam flange 21. The longitudinal direction of the second spacer member 72 coincides with the width direction of the fifth angle 45. The short direction of the second spacer member 72 coincides with the extending direction of the beam 12.

[0065] As shown in FIGS. 3 and 4, the second spacer member 72 is disposed between a portion of the fifth horizontal portion 452 that is away from the first column flange 31 in the extending direction of the beam 12 and the first beam flange 21. The second spacer member 72 is not disposed between a portion of the fifth horizontal portion 452 that is close to the first column flange 31 in the extending direction of the beam 12 and the first beam flange 21.

[0066] As shown in FIG. 7, the fifth angle 45, the second spacer member 72, and the first beam flange 21 are clamped together by screwing a high-strength bolt B inserted through the fifth angle through-hole 45h, the second spacer through-hole 72h, and the beam flange through-hole 21h into a nut N. Thereby, the fifth angle 45, that is, the second connecting portion 62, is fixed to the first beam flange 21 of the beam 12 via the second spacer member 72.

[0067] As shown in FIG. 8, two second spacer through-holes 73h are provided in the third spacer member 73. The two second spacer through-holes 73h are arranged at intervals in the longitudinal direction of the third spacer member 73.

[0068] The third spacer member 73 is disposed between the sixth horizontal portion 462 of the sixth angle 46 and the first beam flange 21. The longitudinal direction of the third spacer member 73 coincides with the width direction of the sixth angle 46. The short-side direction of the third spacer member 73 coincides with the extending direction of the beam 12.

[0069] As shown in FIGS. 3 and 4, the third spacer member 73 is disposed between a portion of the sixth horizontal portion 462 that is away from the second column flange 32 in the extending direction of the beam 12 and the first beam flange 21. The third spacer member 73 is not disposed between a portion of the sixth horizontal portion 462 that is close to the second column flange 32 in the extending direction of the beam 12 and the first beam flange 21.

[0070] As shown in FIG. 8, the sixth angle 46, the third spacer member 73, and the first beam flange 21 are clamped together by screwing a high-strength bolt B inserted through a sixth angle through-hole 46h, a third spacer through-hole 73h, and a beam flange through-hole 21h into a nut N. Thereby, the sixth angle 46, that is, the third connection portion 63, is fixed to the first beam flange 21 of the beam 12 via the third spacer member 73.

[0071] Therefore, the connecting member 16 is fixed to the beam 12 via the spacer 17. As described above, the connecting member 16 is fixed to the column 13. Therefore, the connecting member 16 connects the beam 12 and the column 13.

[0072] As shown in FIG. 3, the plurality of stiffeners 23 of the beam 12 include a first stiffener 23a provided so as to overlap the first column flange 31 in the vertical direction and a second stiffener 23b provided so as to overlap the second column flange 32 in the vertical direction.

[0073] A first main gap G11 is provided between the first column flange 31 and the first beam flange 21. A second main gap G12 is provided between the second column flange 32 and the first beam flange 21. A gap is provided between the column web 30 and the first spacer member 71. Therefore, a third main gap G13 is provided between the column web 30 and the first beam flange 21. Therefore, the entire lower end surface 13a of the column 13 is in a floating state from other members.

[0074] A first sub-gap G21 communicating with the first main gap G11 and a second sub-gap G22 communicating with the second main gap G12 are provided between the first connection portion 61 and the first beam flange 21. In the present embodiment, the first sub-gap G21 is provided between the first horizontal portion 412 of the first angle 41 and the second horizontal portion 422 of the second angle 42 and the first beam flange 21. The second sub-gap G22 is provided between the third horizontal portion 432 of the third angle 43 and the fourth horizontal portion 442 of the fourth angle 44 and the first beam flange 21.

[0075] A third secondary gap G23 communicating with the first main gap G11 is provided between the second connection portion 62 and the first beam flange 21. In the present embodiment, the third secondary gap G23 is provided between the fifth horizontal portion 452 of the fifth angle 45 and the first beam flange 21.

[0076] A fourth secondary gap G24 communicating with the second main gap G12 is provided between the third connection portion 63 and the first beam flange 21. In the present embodiment, the fourth secondary gap G24 is provided between the sixth horizontal portion 462 of the sixth angle 46 and the first beam flange 21.

[0077] [Operation of the Present Embodiment] The operation of the present embodiment will be described. In a structure in which a steel column 13 is connected so as to intersect a steel beam 12, if there is no gap between the column flanges 31, 32 of the column 13 and the beam 12, when the building 100 sways due to an earthquake or the like, a direct load is applied from the column 13 to the beam 12. If the beam 12 is difficult to deform, there is a risk that the column 13 will buckle due to a large load being applied to the column 13 as a reaction force from the beam 12. When the column 13 buckles, the load-bearing capacity of the building 100 is greatly reduced. Also, when the column 13 buckles, it is difficult to repair the building 100.

[0078] In the present embodiment, the steel connection structure 10 includes a steel beam 12, a steel column 13, a connecting member 16 that connects the first beam flange 21 of the beam 12 and the column 13, and a spacer 17 disposed between the connecting member 16 and the first beam flange 21 of the beam 12. A first main gap G11 is provided between the first beam flange 21 of the beam 12 and the first column flange 31 of the column 13. A second main gap G12 is provided between the first beam flange 21 of the beam 12 and the second column flange 32 of the column 13.

[0079] Since the first main gap G11 and the second main gap G12 are provided, when the building 100 sways due to an earthquake or the like, the load directly applied from the column 13 to the beam 12 can be reduced. The load applied to the column 13 is applied to the beam 12 via the connecting member 16. Since the connecting member 16 receives a large load, the connecting member 16 becomes fully plastic before the column 13. Therefore, it becomes difficult for the column 13 to undergo local buckling.

[0080] Further, the connecting member 16 has L-shaped first to sixth angles 41 to 46. The L-shaped structure has higher toughness than a linear structure such as the column 13. For this reason, even when the connecting member 16 is in a fully plastic state, a sudden decrease in the strength of the building 100 is less likely to occur compared to the case where the column 13 is in a fully plastic state.

[0081] Furthermore, in the present embodiment, between the first connecting portion 61 of the connecting member 16 and the first beam flange 21, a first sub-gap G21 communicating with the first main gap G11 and a second sub-gap G22 communicating with the second main gap G12 are provided. The first sub-gap G21 and the second sub-gap G22 function as spaces for the first connecting portion 61 to deform when a load is applied to the connecting member 16. Between the second connecting portion 62 of the connecting member 16 and the first beam flange 21, a third sub-gap G23 communicating with the first main gap G11 is provided. The third sub-gap G23 functions as a space for the second connecting portion 62 to deform when a load is applied to the connecting member 16. Between the third connecting portion 63 of the connecting member 16 and the first beam flange 21, a fourth sub-gap G24 communicating with the second main gap G12 is provided. The fourth sub-gap G24 functions as a space for the third connecting portion 63 to deform when a load is applied to the connecting member 16. Therefore, the connecting member 16 is more likely to deform.

[0082] [Effects of the Present Embodiment] The effects of the present embodiment will be described. (1-1) The steel connection structure 10 includes a connection member 16 that connects the first beam flange 21 of the beam 12 and the column 13, and a spacer 17 disposed between the connection member 16 and the first beam flange 21. A first main gap G11 is provided between the first beam flange 21 and the first column flange 31 of the column 13. A second main gap G12 is provided between the first beam flange 21 and the second column flange 32 of the column 13. According to this configuration, the first main gap G11 and the second main gap G12 make it difficult for a load to be applied to the column 13. Also, the connection member 16 becomes fully plastic before the column 13. Therefore, it becomes difficult for the column 13 to undergo local buckling.

[0083] (1-2) The connection member 16 has first to sixth angles 41 to 46. The first angle 41 has a first longitudinal portion 411 extending along the first inner surface 31b of the first column flange 31, and a first transverse portion 412 orthogonal to the first longitudinal portion 411 and extending along the first beam flange 21. The second angle 42 has a second longitudinal portion 421 extending along the second inner surface 31c of the first column flange 31, and a second transverse portion 422 orthogonal to the second longitudinal portion 421 and extending along the first beam flange 21. The third angle 43 has a third longitudinal portion 431 extending along the third inner surface 32b of the second column flange 32, and a third transverse portion 432 orthogonal to the third longitudinal portion 431 and extending along the first beam flange 21. The fourth angle 44 has a fourth longitudinal portion 441 extending along the fourth inner surface 32c of the second column flange 32, and a fourth transverse portion 442 orthogonal to the fourth longitudinal portion 441 and extending along the first beam flange 21. The fifth angle 45 has a fifth longitudinal portion 451 extending along the first outer surface 31a of the first column flange 31, and a fifth transverse portion 452 orthogonal to the fifth longitudinal portion 451 and extending along the first beam flange 21. The sixth angle 46 has a sixth longitudinal portion 461 extending along the second outer surface 32a of the second column flange 32, and a sixth transverse portion 462 orthogonal to the sixth longitudinal portion 461 and extending along the first beam flange 21.

[0084] According to this configuration, the first to sixth angles 41 to 46, which are L-shaped, can undergo a ductile deformation. Therefore, it is possible to avoid a sharp decrease in the load-bearing capacity when the first to sixth angles 41 to 46 are deformed.

[0085] (1-3) The connecting member 16 has first to third connecting portions 61 to 63. The first connecting portion 61 is located between the first column flange 31 and the second column flange 32 in the extending direction of the beam 12. The second connecting portion 62 is located on the side opposite to the column web 30 with the first column flange 31 interposed therebetween in the extending direction of the beam 12. The third connecting portion 63 is located on the side opposite to the column web 30 with the second column flange 32 interposed therebetween in the extending direction of the beam 12.

[0086] The spacer 17 has first to third spacer members 71 to 73. The first spacer member 71 is disposed between the first connecting portion 61 and the first beam flange 21. The second spacer member 72 is disposed between the second connecting portion 62 and the first beam flange 21. The third spacer member 73 is disposed between the third connecting portion 63 and the first beam flange 21.

[0087] Between the first connecting portion 61 and the first beam flange 21, a first secondary gap G21 communicating with the first main gap G11 and a second secondary gap G22 communicating with the second main gap G12 are provided. Between the second connecting portion 62 and the first beam flange 21, a third secondary gap G23 communicating with the first main gap G11 is provided. Between the third connecting portion 63 and the first beam flange 21, a fourth secondary gap G24 communicating with the second main gap G12 is provided.

[0088] According to this configuration, the first secondary gap G21 and the second secondary gap G22 function as spaces for the first connecting portion 61 to deform when a load is applied to the connecting member 16. The third secondary gap G23 functions as a space for the second connecting portion 62 to deform when a load is applied to the connecting member 16. The fourth secondary gap G24 functions as a space for the third connecting portion 63 to deform when a load is applied to the connecting member 16. Therefore, the connecting member 16 is more likely to deform.

[0089] (1-4) The beam 12 is provided on the beam web 20 and has a stiffener 23 that connects the first beam flange 21 and the second beam flange 22. According to this configuration, since the beam 12 is reinforced by the stiffener 23, deformation of the first beam flange 21 and the second beam flange 22 can be suppressed.

[0090] (1-5) The beam 12 has a first stiffener 23a as the stiffener 23 that vertically overlaps with the first column flange 31, and a second stiffener 23b as the stiffener 23 that vertically overlaps with the second column flange 32. According to this configuration, among the first beam flange 21 and the second beam flange 22, the portion that vertically overlaps with the first column flange 31, which is a portion where load is particularly likely to be applied, is reinforced by the first stiffener 23a. Also, among the first beam flange 21 and the second beam flange 22, the portion that vertically overlaps with the second column flange 32, which is a portion where load is particularly likely to be applied, is reinforced by the second stiffener 23b. Therefore, deformation of the first beam flange 21 and the second beam flange 22 can be suppressed more effectively.

[0091] (1-6) The building 100 includes a first body structure 101 having a first column 11 and a first beam 12, and a second body structure 102 having a second column 13 and a second beam 15 and provided on the first body structure 101. The first body structure 101 has a column-priority ramen structure in which the first column 11 is passed through prior to the first beam 12 at the intersection of the first column 11 and the first beam 12. The second body structure 102 has a beam-priority ramen structure in which the second beam 15 is passed through prior to the second column 13 at the intersection of the second column 13 and the second beam 15. The steel connection structure 10 of the present embodiment is applied to the connection between the first beam 12 of the first body structure 101 and the second column 13 of the second body structure 102.

[0092] When the second body structure 102 of the beam-supported ramen structure is provided on the first body structure 101 of the column-supported ramen structure, when a load is applied to the building 100 from the ground due to an earthquake or the like, a larger load may be applied to the connection portion between the beam 12 of the first body structure 101 and the column 13 of the second body structure 102 than to the connection portions of other parts. Therefore, it is effective to make it difficult for the column 13 to locally buckle at the connection portion between the beam 12 of the first body structure 101 and the column 13 of the second body structure 102. In particular, in this embodiment, since the cross-section of the column 13 is smaller than that of the beam 12, the strength and rigidity of the column 13 are lower than those of the beam 12. For this reason, the column 13 is more likely to locally buckle earlier than the beam 12. Therefore, it is particularly effective to make it difficult for the column 13 to locally buckle.

[0093] For example, when the first body structure 101 is a beam-supported ramen structure, the first column 11 may be arranged on the opposite side of the second column 13 across the first beam 12. In this case, depending on the position of the stiffener 23 provided on the first beam 12 and the position of the high-strength bolt B for connecting the first column 11 and the first beam 12, the connection work between the first column 11 and the first beam 12 may be hindered because the high-strength bolt B interferes with the stiffener 23. On the other hand, in this embodiment, since the first body structure 101 is a column-supported ramen structure, the first column 11 is not arranged on the opposite side of the second column 13 across the first beam 12. Therefore, even if the stiffener 23 is provided as a reinforcing member of the beam 12, the connection work between the first column 11 and the first beam 12 is less likely to be hindered.

[0094] (1-7) For example, the connecting member 16 may have, as the first connecting portion 61, a member to which the first angle 41 and the third angle 43 are connected and a member to which the second angle 42 and the fourth angle 44 are connected. However, in this case, due to the dimensional intersection of the first connecting portion 61 in the extending direction of the beam 12 and the column 13, a gap may be generated between the first connecting portion 61 and the inner surfaces of the column flanges 31 and 32, or the first connecting portion 61 may not be arranged between the first column flange 31 and the second column flange 32. On the other hand, the connecting member 16 of the present embodiment has the first to fourth angles 41 to 44 as the first connecting portion 61. Therefore, the above problems caused by dimensional tolerances can be avoided. In addition, since the angles are commercially available, the procurement of the connecting member 16 becomes easy.

[0095] (1-8) The connecting member 16 of the present embodiment is fixed to the column 13 by high-strength bolts B and nuts N. Therefore, compared with the case where the connecting member 16 is fixed to the column 13 by welding as in the second embodiment described later, the adjustment of the vertical displacement at the construction site becomes easy.

[0096] (1-9) In the present embodiment, the first column flange 31 is sandwiched between the first vertical portion 411, the second vertical portion 421, and the fifth vertical portion 451. Therefore, the load-bearing capacity can be improved as compared with the case where split tees are used instead of the first angle 41, the second angle 42, and the fifth angle 45.

[0097] Similarly, the second column flange 32 is sandwiched between the third vertical portion 431, the fourth vertical portion 441, and the sixth vertical portion 461. Therefore, the load-bearing capacity can be improved as compared with the case where split tees are used instead of the third angle 43, the fourth angle 44, and the sixth angle 46.

[0098] (1-10) The first spacer member 71 is a single plate member. Therefore, the construction becomes easier as compared with the case where the first spacer member 71 is divided. <Second Embodiment> Referring to FIGS. 9 to 15, the steel material connection structure 10 and the building 100 of the second embodiment will be described. In this embodiment, for the components common to the first embodiment, the same reference numerals as those in the first embodiment are used. The description of the overlapping components will be omitted.

[0099] <Connecting member> As shown in FIGS. 9 and 10, the connecting member 16 of this embodiment is a plate member. The lower end portion of the column 13 in the extending direction is welded to the upper surface of the connecting member 16. The longitudinal direction of the connecting member 16 coincides with the direction in which the first column flange 31 and the second column flange 32 face each other. Therefore, the longitudinal direction of the connecting member 16 coincides with the extending direction of the beam 12. The connecting member 16 has a first connecting portion 61, a second connecting portion 62, and a third connecting portion 63.

[0100] In this embodiment, the first connecting portion 61 is a portion of the connecting member 16 that is located between the first column flange 31 and the second column flange 32 in the extending direction of the beam 12. The second connecting portion 62 is a portion of the connecting member 16 that is located on the side opposite to the column web 30 with the first column flange 31 interposed therebetween in the extending direction of the beam 12. The third connecting portion 63 is a portion of the connecting member 16 that is located on the side opposite to the column web 30 with the second column flange 32 interposed therebetween in the extending direction of the beam 12.

[0101] As shown in FIG. 11, a pair of slits 64, 65 are provided in the first connecting portion 61. Each slit 64, 65 extends in the longitudinal direction of the connecting member 16. Each slit 64, 65 penetrates the connecting member 16 in the plate thickness direction. The column web 30 is located between the pair of slits 64, 65. In other words, the pair of slits 64, 65 are located on both sides of the column web 30 in the thickness direction of the column web 30. Each slit 64, 65 extends along the column web 30. One slit 64 is located on one side of the column web 30 in the short side direction of the connecting member 16. The other slit 65 is located on the other side of the column web 30 in the short side direction of the connecting member 16.

[0102] As shown in FIGS. 12 and 13, the first connection portion 61 is provided with a first through hole 61h. The first through holes 61h are provided in two spaced-apart positions in the longitudinal direction of the connection member 16 on each of the portions of the first connection portion 61 located on both sides of the pair of slits 64 and 65.

[0103] As shown in FIG. 11, the first connection portion 61 is provided with a pair of communication portions 66 and 67. Each communication portion 66 and 67 extends in the short side direction of the connection member 16. Each communication portion 66 and 67 penetrates the connection member 16 in the plate thickness direction. Each communication portion 66 and 67 is located between two first through holes 61h arranged in the longitudinal direction of the connection member 16. One communication portion 66 communicates with one slit 64, and the other communication portion 67 communicates with the other slit 65. Each communication portion 66 and 67 opens at the end surface in the short side direction of the connection member 16.

[0104] As shown in FIG. 14, the second connection portion 62 is provided with two second through holes 62h. The two second through holes 62h are arranged at intervals in the short side direction of the connection member 16.

[0105] As shown in FIG. 15, the third connection portion 63 is provided with two third through holes 63h. The two third through holes 63h are arranged at intervals in the short side direction of the connection member 16.

[0106] <Spacer> As shown in FIG. 11, the spacer 17 has first to third spacer members 71 to 73. The first spacer member 71 of the present embodiment has first to fourth spacer pieces 711 to 714. The first to fourth spacer pieces 711 to 714 are each a rectangular plate member. Note that the second spacer member 72 and the third spacer member 73 have the same configuration as that of the first embodiment.

[0107] As shown in FIGS. 12 and 13, the first to fourth spacer pieces 711 to 714 are each provided with a first spacer through hole 71h. As shown in FIGS. 10 and 11, the first to fourth spacer pieces 711 to 714 are disposed between the first connection portion 61 and the first beam flange 21.

[0108] Specifically, the first spacer piece 711 and the second spacer piece 712 are located closer to the first column flange 31 than the pair of communication portions 66, 67 in the longitudinal direction of the connecting member 16. The first spacer piece 711 and the second spacer piece 712 are disposed between a portion of the first connection portion 61 close to the pair of communication portions 66, 67 in the longitudinal direction of the connecting member 16 and the first beam flange 21. The first spacer piece 711 and the second spacer piece 712 are not disposed between a portion of the first connection portion 61 close to the first column flange 31 in the longitudinal direction of the connecting member 16 and the first beam flange 21.

[0109] The third spacer piece 713 and the fourth spacer piece 714 are located closer to the second column flange 32 than the pair of communication portions 66, 67 in the longitudinal direction of the connecting member 16. The third spacer piece 713 and the fourth spacer piece 714 are disposed between a portion of the first connection portion 61 close to the pair of communication portions 66, 67 in the longitudinal direction of the connecting member 16 and the first beam flange 21. The third spacer piece 713 and the fourth spacer piece 714 are not disposed between a portion of the first connection portion 61 close to the second column flange 32 in the longitudinal direction of the connecting member 16 and the first beam flange 21.

[0110] The pair of slits 64, 65 are located between the first spacer piece 711 and the third spacer piece 713 and between the second spacer piece 712 and the fourth spacer piece 714 in the short direction of the connecting member 16. Therefore, the first spacer member 71 is not disposed between the portion of the connecting member 16 located between the pair of slits 64, 65, that is, the portion where the column web 30 of the connecting member 16 is welded and the first beam flange 21.

[0111] As shown in Fig. 12, the first connection part 61, the first spacer piece 711, and the first beam flange 21 are clamped together by screwing a high-strength bolt B inserted through the first through-hole 61h, the first spacer through-hole 71h, and the beam flange through-hole 21h into a nut N.

[0112] The first connection part 61, the second spacer piece 712, and the first beam flange 21 are clamped together by screwing a high-strength bolt B inserted through the first through-hole 61h, the first spacer through-hole 71h, and the beam flange through-hole 21h into a nut N.

[0113] As shown in Fig. 13, the first connection part 61, the third spacer piece 713, and the first beam flange 21 are clamped together by screwing a high-strength bolt B inserted through the first through-hole 61h, the first spacer through-hole 71h, and the beam flange through-hole 21h into a nut N.

[0114] The first connection part 61, the fourth spacer piece 714, and the first beam flange 21 are clamped together by screwing a high-strength bolt B inserted through the first through-hole 61h, the first spacer through-hole 71h, and the beam flange through-hole 21h into a nut N. Thereby, the first connection part 61 is fixed to the first beam flange 21 via the first spacer member 71.

[0115] As shown in Fig. 10, the second spacer member 72 is disposed between the second connection part 62 and the first beam flange 21. The short-side direction of the second spacer member 72 coincides with the extending direction of the beam 12. The second spacer member 72 is disposed between a portion of the second connection part 62 that is away from the first column flange 31 in the extending direction of the beam 12 and the first beam flange 21. The second spacer member 72 is not disposed between a portion of the second connection part 62 that is close to the first column flange 31 in the extending direction of the beam 12 and the first beam flange 21.

[0116] As shown in FIG. 14, the second connection portion 62, the second spacer member 72, and the first beam flange 21 are jointly fastened by screwing a high-strength bolt B inserted through the second through-hole 62h, the second spacer through-hole 72h, and the beam flange through-hole 21h into a nut N. Thereby, the second connection portion 62 is fixed to the first beam flange 21.

[0117] As shown in FIG. 10, the third spacer member 73 is disposed between the third connection portion 63 and the first beam flange 21. The short-side direction of the third spacer member 73 coincides with the extending direction of the beam 12. The third spacer member 73 is disposed between a portion of the third connection portion 63 that is away from the second column flange 32 in the extending direction of the beam 12 and the first beam flange 21. The third spacer member 73 is not disposed between a portion of the third connection portion 63 that is close to the second column flange 32 in the extending direction of the beam 12 and the first beam flange 21.

[0118] As shown in FIG. 15, the third connection portion 63, the third spacer member 73, and the first beam flange 21 are jointly fastened by screwing a high-strength bolt B inserted through the third through-hole 63h, the third spacer through-hole 73h, and the beam flange through-hole 21h into a nut N. Thereby, the third connection portion 63 is fixed to the first beam flange 21. Accordingly, the connecting member 16 is fixed to the first beam flange 21.

[0119] As shown in Fig. 10, a gap is provided between the portion of the first column flange 31 in the connecting member 16 where it is welded and the first beam flange 21. Therefore, a first main gap G11 is provided between the first column flange 31 and the first beam flange 21. A gap is provided between the portion of the second column flange 32 in the connecting member 16 where it is welded and the first beam flange 21. Therefore, a second main gap G12 is provided between the second column flange 32 and the first beam flange 21. As described above, no spacer 17 is arranged between the portion of the column web 30 in the connecting member 16 where it is welded and the first beam flange 21. For this reason, a third main gap G13 is provided between the column web 30 and the first beam flange 21. Therefore, the entire portion of the column 13 in the connecting member 16 where it is welded is in a floating state from other members.

[0120] Between the first connection part 61 and the first beam flange 21, a first secondary gap G21 communicating with the first main gap G11 and a second secondary gap G22 communicating with the second main gap G12 are provided. Between the second connection part 62 and the first beam flange 21, a third secondary gap G23 communicating with the first main gap G11 is provided. Between the third connection part 63 and the first beam flange 21, a fourth secondary gap G24 communicating with the second main gap G12 is provided.

[0121] [Effects of the present embodiment] The effects of the present embodiment will be described. In the present embodiment, in addition to the same effects as (1-1), (1-3) to (1-6) of the first embodiment, the following effects can be obtained.

[0122] (2-1) The connecting member 16 is a plate member to which the lower end portion in the extending direction of the column 13 is welded. The connecting member 16 is provided with a pair of slits 64 and 65 that are located on both sides of the column web 30 in the thickness direction of the column web 30 and extend along the column web 30.

[0123] According to this configuration, due to the pair of slits 64 and 65, the portion of the connecting member 16 located inside the pair of slits 64 and 65, that is, the portion where the column web 30 is welded, and the portion of the connecting member 16 located outside the pair of slits 64 and 65 are separated. Therefore, it becomes difficult for a load to be applied to the column web 30. Thus, deformation of the column 13 can be further suppressed.

[0124] Furthermore, compared with the case where the connecting member 16 has a plurality of angles as in the first embodiment, the number of parts of the connecting member 16 is reduced. Therefore, construction becomes easier and costs can be reduced.

[0125] (2-2) Since no spacer 17 is arranged between the portion of the column web 30 welded to the connecting member 16 and the first beam flange 21, a third main gap G13 is provided between the column web 30 and the first beam flange 21. According to this configuration, since it becomes difficult for a load to be applied to the column web 30, deformation of the column 13 can be further suppressed.

[0126] <Modification Example> The above embodiment is an exemplification of the forms that the steel connection structure 10 and the building 100 can take, and is not intended to limit that form. The steel connection structure 10 and the building 100 can take forms different from those exemplified in the above embodiment. Examples thereof are forms in which a part of the configuration of the embodiment is replaced, changed, or omitted, or forms in which a new configuration is added to the embodiment. Modification examples of the embodiment are shown below.

[0127] · The steel connection structure 10 may be applied to the connection between a girder as a lateral member and a column. · In the above embodiment, the first building structure 101 was of a steel frame structure, but it is not limited thereto. The first building structure 101 may be of an SRC structure.

[0128] · The beam 12 may not have the stiffener 23. · The stiffener 23 may not include the first stiffener 23a and the second stiffener 23b.

[0129] · The number of stiffeners 23 and the interval between the stiffeners 23 in the extending direction of the beam 12 may be appropriately changed according to the thickness of the first beam flange 21 and the second beam flange 22, etc. · In the first embodiment, the connecting member 16 may have, as the first connecting portion 61, a member in which the first horizontal portion 412 of the first angle 41 and the third horizontal portion 432 of the third angle 43 are connected. The connecting member 16 may have, as the first connecting portion 61, a member in which the second horizontal portion 422 of the second angle 42 and the fourth horizontal portion 442 of the fourth angle 44 are connected.

[0130] · In the first embodiment, the first angle 41, the second angle 42, and the fifth angle 45 may be changed to split ties. The third angle 43, the fourth angle 44, and the sixth angle 46 may be changed to split ties.

[0131] · In the first embodiment, the first spacer member 71 may be divided into a portion located between the first angle 41 and the second angle 42 and the first beam flange 21, and a portion located between the third angle 43 and the fourth angle 44 and the first beam flange 21.

[0132] · In the second embodiment, the communication portion 66 of the connecting member 16 may be omitted. That is, the portions located on both sides of the communication portion 66 in the longitudinal direction of the connecting member 16 may be connected. Also, the communication portion 67 of the connecting member 16 may be omitted. That is, the portions located on both sides of the communication portion 67 in the longitudinal direction of the connecting member 16 may be connected. Even in this case, the effect (2-1) of the second embodiment can be obtained. · In the second embodiment, the first spacer piece 711 and the third spacer piece 713 may be connected. The second spacer piece 712 and the fourth spacer piece 714 may be connected.

[0133] This specification discloses the following technology. [Appendix 1] A steel connection structure, comprising a horizontal girder having a web of the horizontal girder, a first flange of the horizontal girder, and a second flange of the horizontal girder, the horizontal girder being made of steel and extending along the horizontal direction; a column having a web of the column, a first flange of the column, and a second flange of the column, the column being made of steel and extending along the vertical direction; a connecting member connecting the first flange of the horizontal girder and the column; and a spacer disposed between the connecting member and the first flange of the horizontal girder, wherein a first main gap is provided between the first flange of the horizontal girder and the first flange of the column, and a second main gap is provided between the first flange of the horizontal girder and the second flange of the column.

[0134] [Appendix 2] In the steel connection structure according to Appendix 1, the connecting member includes a first angle having a first vertical portion extending along a first inner surface located on one side of the column web on the inner surface of the first column flange, and a first horizontal portion orthogonal to the first vertical portion and extending along the first flange of the horizontal girder; a second angle having a second vertical portion extending along a second inner surface located on the other side of the column web on the inner surface of the first column flange, and a second horizontal portion orthogonal to the second vertical portion and extending along the first flange of the horizontal girder; a third angle having a third vertical portion extending along a third inner surface located on one side of the column web on the inner surface of the second column flange, and a third horizontal portion orthogonal to the third vertical portion and extending along the first flange of the horizontal girder; a fourth angle having a fourth vertical portion extending along a fourth inner surface located on the other side of the column web on the inner surface of the second column flange, and a fourth horizontal portion orthogonal to the fourth vertical portion and extending along the first flange of the horizontal girder; a fifth angle having a fifth vertical portion extending along a first outer surface of the first column flange, and a fifth horizontal portion orthogonal to the fifth vertical portion and extending along the first flange of the horizontal girder; and a sixth angle having a sixth vertical portion extending along a second outer surface of the second column flange, and a sixth horizontal portion orthogonal to the sixth vertical portion and extending along the first flange of the horizontal girder.

[0135] [Appendix 3] In the steel material connection structure described in Supplementary Note 1, the connection member is a plate member to which the end portion in the extending direction of the column is welded, and a pair of slits are provided in the connection member on both sides of the column web in the thickness direction of the column web and extending along the column web.

[0136] [Supplementary Note 4] In the steel material connection structure described in Supplementary Note 1, the connection member has a first connection portion located between the first column flange and the second column flange in the extending direction of the cross member, a second connection portion located on the side opposite to the column web with the first column flange interposed therebetween in the extending direction of the cross member, and a third connection portion located on the side opposite to the column web with the second column flange interposed therebetween in the extending direction of the cross member. The spacer has a first spacer member disposed between the first connection portion and the first cross member flange, a second spacer member disposed between the second connection portion and the first cross member flange, and a third spacer member disposed between the third connection portion and the first cross member flange. A first sub-gap communicating with the first main gap and a second sub-gap communicating with the second main gap are provided between the first connection portion and the first cross member flange. A third sub-gap communicating with the first main gap is provided between the second connection portion and the first cross member flange. A fourth sub-gap communicating with the second main gap is provided between the third connection portion and the first cross member flange.

[0137] [Supplementary Note 5] In the steel material connection structure described in Supplementary Note 1, the cross member further has a stiffener provided on the cross member web and connecting the first cross member flange and the second cross member flange.

[0138] [Supplementary Note 6] In the steel material connection structure described in Supplementary Note 5, the cross member has a first stiffener as the stiffener overlapping the first column flange in the vertical direction and a second stiffener as the stiffener overlapping the second column flange in the vertical direction.

[0139] [Supplementary Note 7] A building having the steel connection structure according to any one of claims 1 to 6. [Appendix 8] In the building according to Appendix 7, a first body structure having a first column and a first beam, and a second body structure having a second column and a second beam and provided on the first body structure, wherein the first body structure has a column-priority ramen structure in which the first column is passed through prior to the first beam at a portion where the first column and the first beam intersect, the second body structure has a beam-priority ramen structure in which the second beam is passed through prior to the second column at a portion where the second column and the second beam intersect, the horizontal member is the first beam, and the column is the second column.

Explanation of Reference Numerals

[0140] 10... Steel connection structure, 11... First column, 12... First beam as a beam, 13... Second column as a column, 15... Second beam, 16... Connecting member, 17... Spacer, 20... Beam web as a horizontal member web, 21... First beam flange as a first horizontal member flange, 22... Second beam flange as a second horizontal member flange, 23... Stiffener, 23a... First stiffener, 23b... Second stiffener, 30... Column web, 31... First column flange, 31a... First outer surface, 31b... First inner surface, 31c... Second inner surface, 32... Second column flange, 32a... Second outer surface, 32b... Third inner surface, 32c... Fourth inner surface, 41... First angle, 42... Second angle, 43... Third angle, 44... Fourth angle, 45... Fifth angle, 46... Sixth angle, 61... First connection portion, 62... Second connection portion, 63... Third connection portion, 64... Slit, 65... Slit, 71... First spacer member, 72... Second spacer member, 73... Third spacer member, 100... Building, 101... First body structure, 102... Second body structure, 411... First vertical portion, 412... First horizontal portion, 421... Second vertical portion, 422... Second horizontal portion, 431... Third vertical portion, 432... Third horizontal portion, 441... Fourth vertical portion, 442... Fourth horizontal portion, 451... Fifth vertical portion, 452... Fifth horizontal portion, 461... Sixth vertical portion, 462... Sixth horizontal portion, G11... First main gap, G12... Second main gap, G21... First sub-gap, G22... Second sub-gap, G23... Third sub-gap, G24... Fourth sub-gap.

Claims

1. A connection structure for steel materials, comprising: a steel cross member having a cross member web, a first cross member flange, and a second cross member flange, and extending along the horizontal direction; a steel column having a column web, a first column flange, and a second column flange, and extending along the vertical direction; a connecting member connecting the first cross member flange and the column; a spacer disposed between the connecting member and the first cross member flange; wherein a first main gap is provided between the first cross member flange and the first column flange; a second main gap is provided between the first cross member flange and the second column flange. A connection structure for steel materials.

2. The connecting member includes: a first angle having a first longitudinal portion extending along a first inner surface which is the inner surface of the first column flange and is located on one side of the column web, and a first transverse portion orthogonal to the first longitudinal portion and extending along the first cross member flange; a second angle having a second longitudinal portion extending along a second inner surface which is the inner surface of the first column flange and is located on the other side of the column web, and a second transverse portion orthogonal to the second longitudinal portion and extending along the first cross member flange; a third angle having a third longitudinal portion extending along a third inner surface which is the inner surface of the second column flange and is located on one side of the column web, and a third transverse portion orthogonal to the third longitudinal portion and extending along the first cross member flange; a fourth angle having a fourth longitudinal portion extending along a fourth inner surface which is the inner surface of the second column flange and is located on the other side of the column web, and a fourth transverse portion orthogonal to the fourth longitudinal portion and extending along the first cross member flange; a fifth angle having a fifth longitudinal portion extending along a first outer surface of the first column flange, and a fifth transverse portion orthogonal to the fifth longitudinal portion and extending along the first cross member flange; a sixth angle having a sixth longitudinal portion extending along a second outer surface of the second column flange, and a sixth transverse portion orthogonal to the sixth longitudinal portion and extending along the first cross member flange. The connection structure for steel materials according to Claim 1.

3. The connecting member is a plate member to which an end portion in the extending direction of the column is welded. The connection structure of steel materials according to claim 1, wherein a pair of slits are provided in the connecting member, which are located on both sides of the column web in the thickness direction of the column web and extend along the column web.

4. The connecting member is a first connection portion located between the first column flange and the second column flange in the extending direction of the cross member, a second connection portion located on the side opposite to the column web with the first column flange interposed therebetween in the extending direction of the cross member, a third connection portion located on the side opposite to the column web with the second column flange interposed therebetween in the extending direction of the cross member, and has The spacer is a first spacer member disposed between the first connection portion and the first cross member flange, a second spacer member disposed between the second connection portion and the first cross member flange, a third spacer member disposed between the third connection portion and the first cross member flange, and has a first secondary gap communicating with the first main gap and a second secondary gap communicating with the second main gap are provided between the first connection portion and the first cross member flange, a third secondary gap communicating with the first main gap is provided between the second connection portion and the first cross member flange, a fourth secondary gap communicating with the second main gap is provided between the third connection portion and the first cross member flange. The connection structure of steel materials according to claim 1.

5. The cross member further has a stiffener provided on the cross member web and connecting the first cross member flange and the second cross member flange. The connection structure of steel materials according to claim 1.

6. The cross member is a first stiffener as the stiffener overlapping the first column flange in the vertical direction, a second stiffener as the stiffener overlapping the second column flange in the vertical direction, and has. The connection structure of steel materials according to claim 5.

7. A building having the connection structure of steel materials according to any one of claims 1 to 6.

8. A first body structure having a first column and a first beam, a second body structure having a second column and a second beam and provided on the first body structure, and includes The first body structure has a column-priority ramen structure in which the first column is passed through preferentially over the first beam at a portion where the first column and the first beam intersect, The second body structure has a beam-priority ramen structure in which the second beam is passed through preferentially over the second column at a portion where the second column and the second beam intersect. The building according to claim 7, wherein the horizontal member is the first beam and the column is the second column.

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