Connection structure for steel material and building

Abstract

A connection structure (10) for a 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) has 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 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). A second main gap (G12) is provided between the first beam flange (21) and the second column flange (32).

Description

Steel connection structures and buildings

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

[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 made of H-shaped steel. The column is made of H-shaped steel. The connecting member is, for example, a split tee. The split tee has a bottom piece extending horizontally and an upright piece extending vertically. The split tee connects the beam and the column with the entire bottom piece contacting the flange of the beam and the entire upright piece contacting the flange of the column.

[0003] Japanese Patent Application Publication No. 7-268880

[0004] Columns may undergo local buckling due to earthquakes, etc. This is undesirable because it causes a sudden drop in the column's strength.

[0005] (1) A steel connection structure that is one aspect of the present disclosure comprises a steel cross member having a cross member web, a first cross member flange, and a second cross member flange and extending horizontally; a steel column having a column web, a first column flange, and a second column flange and extending vertically; a connection member that connects the first cross member flange to the column; and a spacer that is arranged between the connection 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, and a second main gap is provided between the first cross member flange and the second column flange.

[0006] With this configuration, the first and second main gaps make it difficult for a load to be applied to the column. Also, the connecting member reaches a fully plastic state before the column. Therefore, the column is less likely to buckle locally.

[0007] (2) In the connection structure of steel materials described in (1) above, the connection member comprises a first angle having a first vertical portion extending along a first inner surface of the first column flange located on one side of the column web, and a first horizontal portion perpendicular to the first vertical portion and extending along the first cross-member flange; a second angle having a second vertical portion extending along a second inner surface of the first column flange located on the other side of the column web, and a second horizontal portion perpendicular to the second vertical portion and extending along the first cross-member flange; a third vertical portion extending along a third inner surface of the second column flange located on one side of the column web, and a second horizontal portion perpendicular to the third vertical portion and extending along the first cross-member flange; a third angle having a third horizontal portion extending along the first cross member flange; a fourth angle having a fourth vertical portion extending along a fourth inner surface of the second column flange that is located on the other side of the column web, and a fourth horizontal portion perpendicular to the fourth vertical portion and extending along the first cross member flange; a fifth angle having a fifth vertical portion extending along a first outer surface of the first column flange and a fifth horizontal portion perpendicular to the fifth vertical portion and extending along the first cross member flange; 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 perpendicular to the sixth vertical portion and extending along the first cross member flange.

[0008] According to this configuration, each L-shaped angle can deform with ductility. Therefore, a sudden drop in strength can be avoided when the angle deforms. (3) In the connection structure of steel materials described in (1) above, the connection member is a plate member to which the end of the column in the extension direction is welded, and the connection member is provided with a pair of slits located 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, the pair of slits separate the part of the connecting member located inside the pair of slits, i.e., the part where the column web is welded, from the part of the connecting member located outside the pair of slits. This makes it difficult for a load to be applied to the column web, thereby further suppressing column deformation.

[0010] Furthermore, the number of parts of the connection member is reduced compared to when the connection member has multiple angles. Therefore, construction is easier and costs can be reduced. (4) In the connection structure of any one of the steel members described above in (1) to (3), 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 opposite side of the column web across the first column flange in the extending direction of the cross member, and a third connection portion located on the opposite side of the column web across the second column flange in the extending direction of the cross member, and the spacer includes a first spacer member arranged between the first connection portion and the first cross member flange, and a second spacer member arranged on the opposite side of the second connection portion in the extending direction of the cross member. The joint has a second spacer member arranged between the connection portion and the first cross member flange, and a third spacer member arranged between the third connection portion and the first cross member flange, and 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, and a fourth sub-gap communicating with the second main gap is provided between the third connection portion and the first cross member flange.

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

[0012] (5) In any one of the steel connection structures (1) to (4) above, 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.

[0013] 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. (6) In the connection structure of steel members described above in (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.

[0014] According to this configuration, the portions of the first and second beam flanges that vertically overlap with the first column flange, which are particularly susceptible to load application, are reinforced by the first stiffener. Also, the portions of the first and second beam flanges that vertically overlap with the second column flange, which are particularly susceptible to load application, are reinforced by the second stiffener. Therefore, deformation of the first and second beam flanges can be more effectively suppressed.

[0015] (7) A building according to one aspect of the present disclosure has a steel connection structure according to any one of (1) to (6) above. With this configuration, the first main gap and the second main gap make it difficult for a load to be applied to the column. Furthermore, the connection member reaches a fully plastic state before the column. Therefore, the column is less likely to buckle locally.

[0016] (8) The building of (7) above comprises 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 is a column-oriented rigid frame structure in which the first column passes through before the first beam at the intersection of the first column and the first beam, and the second body structure is a beam-oriented rigid frame structure in which the second beam passes through before the second column at the intersection of the second column and the second beam, and the cross member is the first beam and the column is the second column.

[0017] When a second skeleton structure of beam-supported rigid frame construction is installed on a first skeleton structure of column-supported rigid frame construction, if a load is applied to the building from the ground due to an earthquake or the like, the connection parts between the beams of the first skeleton structure and the columns of the second skeleton structure may be subjected to a larger load than the connection parts in other parts. Therefore, it is particularly effective to make the columns at the connection parts between the beams of the first skeleton structure and the columns of the second skeleton structure less susceptible to local buckling.

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

[0019] 11. A schematic diagram of a building. A perspective view showing the steel connection structure in the first embodiment. A front view showing the steel connection structure in the first embodiment. A plan view showing the steel connection structure in the first embodiment. A cross-sectional view showing the steel connection structure along line 1-1 in FIG. 4. A cross-sectional view showing the steel connection structure along line 2-2 in FIG. 4. A cross-sectional view showing the steel connection structure along line 3-3 in FIG. 4. A cross-sectional view showing the steel connection structure along line 4-4 in FIG. 4. A perspective view showing the steel connection structure in the second embodiment. A front view showing the steel connection structure in the second embodiment. A plan view showing the steel connection structure in the second embodiment. A cross-sectional view showing the steel connection structure along line 5-5 in FIG. 11. A cross-sectional view showing the steel connection structure along line 6-6 in FIG. 11. A cross-sectional view showing the steel connection structure along line 7-7 in FIG. 11. A cross-sectional view showing the steel connection structure along line 8-8 in FIG. 11.

[0020] 1 to 8, a steel material connection structure 10 and a building 100 according to a first embodiment will be described. Examples of the building 100 include a detached house, an apartment building, a commercial facility, and a public facility.

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

[0022] The first skeleton structure 101 of this embodiment includes a plurality of first columns 11 extending vertically and first beams 12 extending horizontally as cross members. The first skeleton structure 101 may further include girders as cross members. The first columns 11 extend vertically upward from a foundation portion 103. The foundation portion 103 has a foundation. At the intersections between the first columns 11 and the first beams 12, the first columns 11 are passed through with priority over the first beams 12. The first beams 12 are located between adjacent first columns 11. The first columns 11 and the first beams 12 are joined. The first skeleton structure 101 of this embodiment is a column-supported rigid frame structure.

[0023] The second skeleton structure 102 of this embodiment includes one or more second columns 13 extending vertically, one or more support columns 14 extending vertically, and second beams 15 extending horizontally as cross members. The second skeleton structure 102 may further include girders as cross members. The second columns 13 are positioned so as not to overlap the first columns 11 in the vertical direction. On the other hand, the support columns 14 may be positioned so as to overlap the first columns 11 in the vertical direction. The support columns 14 are formed, for example, from square pipes. At the intersection between the second columns 13 and the second beams 15, the second beams 15 are passed through with priority over the second columns 13. The second beams 15 are placed on top of the second columns 13. The second columns 13 and the second beams 15 are joined. The second skeleton structure 102 has a beam-supported rigid frame structure.

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

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

[0026] The beam 12 is made of H-shaped steel. The beam 12 has a beam web 20 as a cross member web, a first beam flange 21 as a first cross member flange, and a second beam flange 22 as a second cross member flange. The beam web 20, the first beam flange 21, and the second beam flange 22 are each flat. The first beam flange 21 is provided at a first end of the beam web 20 in the width direction. The second beam flange 22 is provided at a second end of the beam web 20 in the width direction. 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] 3, beam flange through holes 21h are provided in the first beam flange 21. Four beam flange through holes 21h are provided at intervals in the extension direction of the beam 12 in a portion of the first beam flange 21 located on one side of the beam web 20. Four beam flange through holes 21h are provided at intervals in the extension 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 this 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 Figure 4, the column 13 is made of 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 flat plate-shaped. The first column flange 31 is provided at a first end of the column web 30 in the width direction. The second column flange 32 is provided at a second end of the column web 30 in the width direction. The first column flange 31 and the second column flange 32 face each other in the extension direction of the beam 12. In this 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] First column flange through holes 31h are provided in the first column flange 31. Three first column flange through holes 31h are provided at intervals in the extension direction of the column 13 in a portion of the first column flange 31 located on one side of the column web 30. In addition, three first column flange through holes 31h are provided at intervals in the extension 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] Second column flange through holes 32h are provided in the second column flange 32. Three second column flange through holes 32h are provided at intervals in the extension direction of the column 13 in a portion of the second column flange 32 located on one side of the column web 30. In addition, three second column flange through holes 32h are provided at intervals in the extension 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] <Connection member> The connection member 16 has a first connection portion 61, a second connection portion 62, and a third connection portion 63. The first connection portion 61 is located between the first column flange 31 and the second column flange 32 in the extension direction of the beam 12. The second connection portion 62 is located on the opposite side of the column web 30 across the first column flange 31 in the extension direction of the beam 12. The third connection portion 63 is located on the opposite side of the column web 30 across the second column flange 32 in the extension direction of the beam 12.

[0036] The connecting member 16 of this embodiment has L-shaped first to sixth angle members 41 to 46. The first to fourth angle members 41 to 44 are located between the first column flange 31 and the second column flange 32 in the extension direction of the beam 12. In other words, the first to fourth angle members 41 to 44 constitute a first connection portion 61. The fifth angle member 45 is located on the opposite side of the column web 30 across the first column flange 31 in the extension direction of the beam 12. In other words, the fifth angle member 45 constitutes a second connection portion 62. The sixth angle member 46 is located on the opposite side of the column web 30 across the second column flange 32 in the extension direction of the beam 12. In other words, the sixth angle member 46 constitutes a third connection portion 63. The fifth angle member 45 and the sixth angle member 46 are each wider than the first to fourth angle members 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 so 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 extension direction of the column 13. The first horizontal portion 412 extends in the extension direction of the beam 12. The first angle 41 has first angle through holes 41h. Three first angle through holes 41h are provided in the first vertical portion 411 at intervals in the extension direction of the column 13. The first angle through holes 41h are also provided in the first horizontal portion 412.

[0038] As shown in Figures 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 so 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 extension direction of the column 13. The second horizontal portion 422 extends in the extension direction of the beam 12. The second angle 42 has second angle through holes 42h. Three second angle through holes 42h are provided in the second vertical portion 421 at intervals in the extension direction of the column 13. The second angle through holes 42h are 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 so 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 extension direction of the column 13. The third horizontal portion 432 extends in the extension direction of the beam 12. The third angle 43 has third angle through holes 43h. Three third angle through holes 43h are provided in the third vertical portion 431 at intervals in the extension direction of the column 13. The third angle through holes 43h are also provided in the third horizontal portion 432.

[0040] As shown in Figures 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 so 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 extension direction of the column 13. The fourth horizontal portion 442 extends in the extension direction of the beam 12. The fourth angle 44 has fourth angle through holes 44h. Three fourth angle through holes 44h are provided in the fourth vertical portion 441 at intervals in the extension direction of the column 13. Fourth angle through holes 44h are also provided in the fourth horizontal portion 442.

[0041] 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 so that the fifth vertical portion 451 is along the first outer surface 31 a of the first column flange 31 and the fifth horizontal portion 452 is along the outer surface 21 a of the first beam flange 21. The fifth vertical portion 451 extends in the extension direction of the column 13. The fifth horizontal portion 452 extends in the extension direction of the beam 12.

[0042] Fifth angle through holes 45h are provided in the fifth angle 45. Three fifth angle through holes 45h are provided at intervals in the extension direction of the column 13 in a portion of the fifth vertical portion 451 located on one side of the column web 30. Three fifth angle through holes 45h are provided at intervals in the extension 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] 7, the fifth angle through-holes 45h are also provided in the fifth horizontal portion 452. One fifth angle through-hole 45h is provided in each portion of the fifth horizontal portion 452 located on each side of the beam web 20.

[0044] 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 so 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 extension direction of the column 13. The sixth horizontal portion 462 extends in the extension direction of the beam 12.

[0045] Sixth angle through holes 46h are provided in the sixth angle 46. Three sixth angle through holes 46h are provided at intervals in the extension direction of the column 13 in a portion of the sixth vertical portion 461 located on one side of the column web 30. In addition, three sixth angle through holes 46h are provided at intervals in the extension direction of the column 13 in a portion of the sixth vertical portion 461 located on the other side of the column web 30.

[0046] 8, the sixth angle through-holes 46h are also provided in the sixth horizontal portion 462. The sixth angle through-holes 46h are provided in the sixth horizontal portion 462, one in each of the portions located on both sides of the beam web 20.

[0047] As shown in Figure 4, the 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, first column flange 31, and fifth angle 45 are fastened together by screwing high-strength bolts B into nuts N, which are inserted through the first angle through-holes 41h, first column flange through-holes 31h, and fifth angle through-holes 45h.

[0048] The 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, first column flange 31, and fifth angle 45 are fastened together by screwing high-strength bolts B into nuts N, which are inserted through the second angle through-holes 42h, first column flange through-holes 31h, and fifth angle through-holes 45h.

[0049] The portion of the second column flange 32 located on one side of the column web 30 is sandwiched between the third vertical portion 431 of the third angle 43 and the sixth vertical portion 461 of the sixth angle 46. The third angle 43, second column flange 32, and sixth angle 46 are fastened together by screwing high-strength bolts B, which are inserted into the third angle through-holes 43h, second column flange through-holes 32h, and sixth angle through-holes 46h, into nuts 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 vertical portion 441 of the fourth angle 44 and the sixth vertical portion 461 of the sixth angle 46. The fourth angle 44, second column flange 32, and sixth angle 46 are fastened together by screwing high-strength bolts B, which are inserted into the fourth angle through-holes 44h, second column flange through-holes 32h, and sixth angle through-holes 46h, into nuts 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 Figure 3, in this 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] <Spacers> 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 connection member 16 and the first beam flange 21. The second spacer member 72 is disposed between the second connection portion 62 of the connection member 16 and the first beam flange 21. The third spacer member 73 is disposed between the third connection portion 63 of the connection member 16 and the first beam flange 21.

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

[0055] 5 and 6, first spacer through-holes 71h are provided in the first spacer member 71. The first spacer through-holes 71h are provided at each corner of the first spacer member 71.

[0056] The first spacer member 71 is arranged 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] 3 and 4 , the first spacer member 71 is disposed between the first beam flange 21 and the portions of the first horizontal portion 412 and the second horizontal portion 422 that are far from the first column flange 31 in the extension direction of the beam 12. The first spacer member 71 is not disposed between the first beam flange 21 and the portions of the first horizontal portion 412 and the second horizontal portion 422 that are close to the first column flange 31 in the extension direction of the beam 12.

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

[0059] 5, the first angle 41, the first spacer member 71, and the first beam flange 21 are fastened together by threading high-strength bolts B, which are inserted through the first angle through-holes 41h, the first spacer through-holes 71h, and the beam flange through-holes 21h, into nuts N. In this way, 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 fastened together by threading high-strength bolts B, which are inserted through the second angle through-holes 42h, the first spacer through-holes 71h, and the beam flange through-holes 21h, into nuts N. In this way, the second angle 42 is fixed to the first beam flange 21 via the first spacer member 71.

[0061] 6, the third angle 43, the first spacer member 71, and the first beam flange 21 are fastened together by threading high-strength bolts B, which are inserted through the third angle through-holes 43h, the first spacer through-holes 71h, and the beam flange through-holes 21h, into nuts N. In this way, 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 fastened together by screwing high-strength bolts B, which are inserted through the fourth angle through-holes 44h, the first spacer through-holes 71h, and the beam flange through-holes 21h, into nuts N. This fixes the fourth angle 44 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] 7, two second spacer through holes 72h are provided in the second spacer member 72. The two second spacer through holes 72h are arranged side by side in the longitudinal direction of the second spacer member 72 with a gap therebetween.

[0064] The second spacer member 72 is disposed between the fifth horizontal portion 452 of the fifth angle member 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 member 45. The lateral direction of the second spacer member 72 coincides with the extension direction of the beam 12.

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

[0066] 7, the fifth angle 45, the second spacer member 72, and the first beam flange 21 are fastened together by threading high-strength bolts B, which are inserted through the fifth angle through-holes 45h, the second spacer through-holes 72h, and the beam flange through-holes 21h, into nuts N. As a result, the fifth angle 45, i.e., the second connection portion 62, is fixed to the first beam flange 21 of the beam 12 via the second spacer member 72.

[0067] 8, two third spacer through holes 73h are provided in the third spacer member 73. The two third spacer through holes 73h are arranged side by side in the longitudinal direction of the third spacer member 73 with a gap therebetween.

[0068] The third spacer member 73 is disposed between the sixth horizontal portion 462 of the sixth angle member 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 member 46. The lateral direction of the third spacer member 73 coincides with the extension direction of the beam 12.

[0069] 3 and 4 , the third spacer member 73 is disposed between a portion of the sixth horizontal portion 462 that is far from the second column flange 32 in the extension 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 extension direction of the beam 12 and the first beam flange 21.

[0070] 8, the sixth angle 46, the third spacer member 73, and the first beam flange 21 are fastened together by threading high-strength bolts B, which are inserted through the sixth angle through-holes 46h, the third spacer through-holes 73h, and the beam flange through-holes 21h, into nuts N. As a result, the sixth angle 46, i.e., 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 Figure 3, the multiple stiffeners 23 of the beam 12 include a first stiffener 23a arranged to overlap the first column flange 31 in the vertical direction, and a second stiffener 23b arranged 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 floating above the 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 this embodiment, the first sub-gap G21 is provided between the first horizontal portion 412 of the first angle member 41 and the second horizontal portion 422 of the second angle member 42 and the first beam flange 21. The second sub-gap G22 is provided between the third horizontal portion 432 of the third angle member 43 and the fourth horizontal portion 442 of the fourth angle member 44 and the first beam flange 21.

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

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

[0077] [Operation of this embodiment] The operation of this embodiment will be described. In a structure in which a steel column 13 is connected to a steel beam 12 so as to intersect with it, if there is no gap between the column flanges 31, 32 of the column 13 and the beam 12, a load is applied directly from the column 13 to the beam 12 when the building 100 shakes due to an earthquake or the like. If the beam 12 is not easily deformed, a large load is applied to the column 13 as a reaction force from the beam 12, which may cause the column 13 to buckle. If the column 13 buckles, the bearing capacity of the building 100 will be significantly reduced. Furthermore, if the column 13 buckles, it will be difficult to repair the building 100.

[0078] In this embodiment, the steel connection structure 10 includes a steel beam 12, a steel column 13, a connection member 16 that connects a first beam flange 21 of the beam 12 to the column 13, and a spacer 17 that is disposed between the connection 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 a 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 a second column flange 32 of the column 13.

[0079] By providing the first main gap G11 and the second main gap G12, the load applied directly from the column 13 to the beam 12 can be reduced when the building 100 is shaken by an earthquake or the like. The load applied to the column 13 is applied to the beam 12 via the connection member 16. Because the connection member 16 receives a large load, the connection member 16 reaches a fully plastic state before the column 13. Therefore, the column 13 is less likely to buckle locally.

[0080] Furthermore, the connecting member 16 has first to sixth L-shaped angles 41 to 46. An L-shaped structure has higher toughness than a linear structure such as the column 13. Therefore, even if the connecting member 16 becomes fully plastic, the strength of the building 100 is less likely to decrease suddenly compared to when the column 13 becomes fully plastic.

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

[0082] [Effects of this embodiment] The effects of this 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 to the column 13, and a spacer 17 that is 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. With 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. Furthermore, the connection member 16 reaches a fully plastic state before the column 13. Therefore, the column 13 is less likely to locally buckle.

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

[0084] This configuration allows the L-shaped first to sixth angle members 41 to 46 to deform with ductility, thereby preventing a sudden drop in yield strength when the first to sixth angle members 41 to 46 deform.

[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 extension direction of the beam 12. The second connecting portion 62 is located on the opposite side of the column web 30 across the first column flange 31 in the extension direction of the beam 12. The third connecting portion 63 is located on the opposite side of the column web 30 across the second column flange 32 in the extension 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 connection portion 61 and the first beam flange 21. The second spacer member 72 is disposed between the second connection portion 62 and the first beam flange 21. The third spacer member 73 is disposed between the third connection portion 63 and the first beam flange 21.

[0087] 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. A third sub-gap G23 communicating with the first main gap G11 is provided between the second connection portion 62 and the first beam flange 21. A fourth sub-gap G24 communicating with the second main gap G12 is provided between the third connection portion 63 and the first beam flange 21.

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

[0089] (1-4) The beam 12 has stiffeners 23 that are provided on the beam web 20 and connect the first beam flange 21 and the second beam flange 22. With this configuration, the beam 12 is reinforced by the stiffeners 23, so 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 overlaps the first column flange 31 in the vertical direction, and a second stiffener 23b as the stiffener 23 that overlaps the second column flange 32 in the vertical direction. With this configuration, the portions of the first beam flange 21 and the second beam flange 22 that overlap the first column flange 31 in the vertical direction, which are particularly susceptible to load application, are reinforced by the first stiffener 23a. Furthermore, the portions of the first beam flange 21 and the second beam flange 22 that overlap the second column flange 32 in the vertical direction, which are particularly susceptible to load application, are reinforced by the second stiffener 23b. Therefore, deformation of the first beam flange 21 and the second beam flange 22 can be more effectively suppressed.

[0091] (1-6) The building 100 comprises a first skeleton structure 101 having a first column 11 and a first beam 12, and a second skeleton structure 102 having a second column 13 and a second beam 15 and provided on the first skeleton structure 101. The first skeleton structure 101 is a column-supported rigid frame structure in which the first column 11 passes through with priority over the first beam 12 at the intersection between the first column 11 and the first beam 12. The second skeleton structure 102 is a beam-supported rigid frame structure in which the second beam 15 passes with priority over the second column 13 at the intersection between the second column 13 and the second beam 15. The steel connection structure 10 of this embodiment is applied to the connection between the first beam 12 of the first skeleton structure 101 and the second column 13 of the second skeleton structure 102.

[0092] When a second skeleton structure 102 of a beam-supported rigid frame structure is installed on a first skeleton structure 101 of a column-supported rigid frame structure, if 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 skeleton structure 101 and the column 13 of the second skeleton structure 102 than to other connection portions. Therefore, it is effective to make the column 13 at the connection portion between the beam 12 of the first skeleton structure 101 and the column 13 of the second skeleton structure 102 less susceptible to local buckling.

[0093] In particular, in this embodiment, the cross section of the column 13 is smaller than the cross section of the beam 12, and therefore the strength and rigidity of the column 13 are lower than the strength and rigidity of the beam 12. For this reason, the column 13 is more likely to locally buckle than the beam 12. Therefore, it is particularly effective to make the column 13 less susceptible to local buckling.

[0094] For example, if the first skeleton structure 101 is a beam-supported rigid frame structure, the first column 11 may be disposed on the opposite side of the second column 13 across the first beam 12. In this case, depending on the positions of the stiffeners 23 provided on the first beams 12 and the positions of the high-strength bolts B for connecting the first column 11 and the first beams 12, the high-strength bolts B may interfere with the stiffeners 23, which may hinder the connection work between the first column 11 and the first beams 12. In contrast, in this embodiment, because the first skeleton structure 101 is a column-supported rigid frame structure, the first column 11 is not disposed on the opposite side of the second column 13 across the first beam 12. Therefore, even if the stiffeners 23 are provided as reinforcing members for the beams 12, the connection work between the first column 11 and the first beams 12 is unlikely to be hindered.

[0095] (1-7) For example, the connection member 16 may have, as the first connection portion 61, a member connecting the first angle 41 and the third angle 43, and a member connecting the second angle 42 and the fourth angle 44. However, in this case, due to the dimensional tolerance between the first connection portion 61 and the column 13 in the extension direction of the beam 12, a gap may occur between the first connection portion 61 and the inner surfaces of the column flanges 31 and 32, or the first connection portion 61 may not be able to be positioned between the first column flange 31 and the second column flange 32. In contrast, the connection member 16 of this embodiment has the first to fourth angle portions 41 to 44 as the first connection portion 61. This avoids the above-mentioned problems caused by dimensional tolerances. Furthermore, since angles are commercially available, the connection member 16 is easily procured.

[0096] (1-8) The connecting member 16 in this embodiment is fixed to the column 13 by a high-strength bolt B and a nut N. Therefore, it is easier to adjust vertical misalignment at the construction site compared to when the connecting member 16 is fixed to the column 13 by welding as in the second embodiment described later.

[0097] (1-9) In this 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 bearing strength can be improved compared to when split tees are used instead of the first angle 41, the second angle 42, and the fifth angle 45.

[0098] 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 bearing strength can be improved compared to when split tees are used instead of the third angle 43, the fourth angle 44, and the sixth angle 46.

[0099] (1-10) The first spacer member 71 is a single plate member. Therefore, construction is easier than when the first spacer member 71 is divided. <Second embodiment> A steel connection structure 10 and a building 100 according to a second embodiment will be described with reference to Figures 9 to 15. In this embodiment, components that are common to the first embodiment are assigned the same reference numerals as those in the first embodiment. Descriptions of overlapping components will be omitted.

[0100] <Connection Member> As shown in Figures 9 and 10 , the connection member 16 of this embodiment is a plate member. The lower end of the column 13 in the extension direction is welded to the upper surface of the connection member 16. The longitudinal direction of the connection 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 connection member 16 coincides with the extension direction of the beam 12. The connection member 16 has a first connection portion 61, a second connection portion 62, and a third connection portion 63.

[0101] In this embodiment, the first connection portion 61 is a portion of the connection member 16 located between the first column flange 31 and the second column flange 32 in the extension direction of the beam 12. The second connection portion 62 is a portion of the connection member 16 located on the opposite side of the column web 30 across the first column flange 31 in the extension direction of the beam 12. The third connection portion 63 is a portion of the connection member 16 located on the opposite side of the column web 30 across the second column flange 32 in the extension direction of the beam 12.

[0102] As shown in Figure 11, the first connection portion 61 has a pair of slits 64, 65. Each slit 64, 65 extends in the longitudinal direction of the connection member 16. Each slit 64, 65 penetrates the connection 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 direction of the connection member 16. The other slit 65 is located on the other side of the column web 30 in the short direction of the connection member 16.

[0103] 12 and 13 , first through holes 61 h are provided in the first connection portion 61. Two first through holes 61 h are provided at a distance from each other in the longitudinal direction of the connection member 16 in portions of the first connection portion 61 located on both sides of the pair of slits 64, 65.

[0104] 11 , the first connection portion 61 is provided with a pair of communication portions 66, 67. Each communication portion 66, 67 extends in the short-side direction of the connection member 16. Each communication portion 66, 67 penetrates the connection member 16 in the plate thickness direction. Each communication portion 66, 67 is located between two first through holes 61h aligned 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, 67 opens at an end face of the connection member 16 in the short-side direction.

[0105] 14, two second through holes 62h are provided in the second connection portion 62. The two second through holes 62h are arranged side by side with a gap between them in the short-side direction of the connection member 16.

[0106] 15, two third through holes 63h are provided in the third connection portion 63. The two third through holes 63h are arranged side by side with a gap between them in the short-side direction of the connection member 16.

[0107] 11, the spacer 17 has first to third spacer members 71 to 73. The first spacer member 71 of this 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. The second spacer member 72 and the third spacer member 73 have the same configuration as in the first embodiment.

[0108] 12 and 13, a first spacer through-hole 71h is provided in each of the first to fourth spacer pieces 711 to 714. 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.

[0109] 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 communicating portions 66, 67 in the longitudinal direction of the connecting member 16. The first spacer piece 711 and the second spacer piece 712 are arranged between the first beam flange 21 and a portion of the first connection portion 61 that is close to the pair of communicating portions 66, 67 in the longitudinal direction of the connecting member 16. The first spacer piece 711 and the second spacer piece 712 are not arranged between the first beam flange 21 and a portion of the first connection portion 61 that is close to the first column flange 31 in the longitudinal direction of the connecting member 16.

[0110] The third spacer piece 713 and the fourth spacer piece 714 are located closer to the second column flange 32 than the pair of communicating portions 66, 67 in the longitudinal direction of the connecting member 16. The third spacer piece 713 and the fourth spacer piece 714 are arranged between the first beam flange 21 and a portion of the first connecting portion 61 that is close to the pair of communicating portions 66, 67 in the longitudinal direction of the connecting member 16. The third spacer piece 713 and the fourth spacer piece 714 are not arranged between the first beam flange 21 and a portion of the first connecting portion 61 that is close to the second column flange 32 in the longitudinal direction of the connecting member 16.

[0111] The pair of slits 64, 65 are located between the first spacer piece 711 and the third spacer piece 713 and 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 in the portion of the connecting member 16 located between the pair of slits 64, 65, i.e., between the portion of the connecting member 16 where the column web 30 is welded and the first beam flange 21.

[0112] As shown in Figure 12, the first connection portion 61, the first spacer piece 711, and the first beam flange 21 are fastened together by screwing a high-strength bolt B inserted into the first through hole 61h, the first spacer through hole 71h, and the beam flange through hole 21h into a nut N.

[0113] The first connection portion 61, the second spacer piece 712, and the first beam flange 21 are fastened together by screwing a high-strength bolt B inserted into the first through hole 61h, the first spacer through hole 71h, and the beam flange through hole 21h into a nut N.

[0114] As shown in Figure 13, the first connection portion 61, the third spacer piece 713, and the first beam flange 21 are fastened together by screwing a high-strength bolt B inserted into the first through hole 61h, the first spacer through hole 71h, and the beam flange through hole 21h into a nut N.

[0115] The first connecting portion 61, the fourth spacer piece 714, and the first beam flange 21 are fastened together by screwing a high-strength bolt B, which is inserted through the first through-hole 61 h, the first spacer through-hole 71 h, and the beam flange through-hole 21 h, into a nut N. In this way, the first connecting portion 61 is fixed to the first beam flange 21 via the first spacer member 71.

[0116] 10 , the second spacer member 72 is disposed between the second connection portion 62 and the first beam flange 21. The short side direction of the second spacer member 72 coincides with the extension direction of the beam 12. The second spacer member 72 is disposed between the first beam flange 21 and a portion of the second connection portion 62 that is distant from the first column flange 31 in the extension direction of the beam 12. The second spacer member 72 is not disposed between the first beam flange 21 and a portion of the second connection portion 62 that is close to the first column flange 31 in the extension direction of the beam 12.

[0117] 14 , the second connection portion 62, the second spacer member 72, and the first beam flange 21 are fastened together by screwing high-strength bolts B, which are inserted through the second through-holes 62 h, the second spacer through-holes 72 h, and the beam flange through-holes 21 h, into nuts N. In this way, the second connection portion 62 is fixed to the first beam flange 21.

[0118] As shown in Figure 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 extension direction of the beam 12. The third spacer member 73 is disposed between a portion of the third connection portion 63 that is distant from the second column flange 32 in the extension 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 extension direction of the beam 12 and the first beam flange 21.

[0119] 15 , the third connection portion 63, the third spacer member 73, and the first beam flange 21 are fastened together by screwing a high-strength bolt B, which is inserted through the third through-hole 63h, the third spacer through-hole 73h, and the beam flange through-hole 21h, into a nut N. This fixes the third connection portion 63 to the first beam flange 21. Therefore, the connection member 16 is fixed to the first beam flange 21.

[0120] As shown in Figure 10, a gap is provided between the portion of the connection member 16 where the first column flange 31 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 connection member 16 where the second column flange 32 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 disposed between the portion of the connection member 16 where the column web 30 is welded and the first beam flange 21. Therefore, a third main gap G13 is provided between the column web 30 and the first beam flange 21. Therefore, the entire portion of the connection member 16 where the column 13 is welded is floating from the other components.

[0121] 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. A third sub-gap G23 communicating with the first main gap G11 is provided between the second connection portion 62 and the first beam flange 21. A fourth sub-gap G24 communicating with the second main gap G12 is provided between the third connection portion 63 and the first beam flange 21.

[0122] [Advantages of this embodiment] The advantages of this embodiment will be described below. In addition to the advantages (1-1), (1-3) to (1-6) of the first embodiment, this embodiment also provides the following advantages.

[0123] (2-1) The connecting member 16 is a plate member to which the lower end in the extending direction of the column 13 is welded. The connecting member 16 is provided with a pair of slits 64, 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.

[0124] According to this configuration, the pair of slits 64, 65 separates the part of the connecting member 16 located inside the pair of slits 64, 65, i.e., the part where the column web 30 is welded, from the part of the connecting member 16 located outside the pair of slits 64, 65. This makes it difficult for a load to be applied to the column web 30. Therefore, deformation of the column 13 can be further suppressed.

[0125] Furthermore, compared to the first embodiment in which the connecting member 16 has a plurality of angles, the number of parts of the connecting member 16 is reduced, which makes installation easier and reduces costs.

[0126] (2-2) Since no spacer 17 is disposed between the portion of the connecting member 16 where the column web 30 is welded and the first beam flange 21, a third main gap G13 is provided between the column web 30 and the first beam flange 21. With this configuration, it is difficult for a load to be applied to the column web 30, so deformation of the column 13 can be further suppressed.

[0127] <Modifications> The above-described embodiments are examples of possible forms of the steel connection structure 10 and the building 100, and are not intended to limit the forms. The steel connection structure 10 and the building 100 may take forms different from those illustrated in the above-described embodiments. Examples include forms in which part of the configuration of the embodiment is replaced, changed, or omitted, or forms in which a new configuration is added to the embodiment. Modifications of the embodiments are shown below.

[0128] The steel connection structure 10 may be applied to connecting a girder and a column as a cross member. In the above embodiment, the first skeleton structure 101 is made of steel, but this is not limiting. The first skeleton structure 101 may be made of SRC.

[0129] The beam 12 does not have to have the stiffener 23. The stiffener 23 does not have to include the first stiffener 23a and the second stiffener 23b.

[0130] The number of stiffeners 23 and the spacing between the stiffeners 23 in the extension direction of the beam 12 may be changed as appropriate depending on the thicknesses 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 connection portion 61, a member connecting the first horizontal portion 412 of the first angle member 41 and the third horizontal portion 432 of the third angle member 43. The connecting member 16 may have, as the first connection portion 61, a member connecting the second horizontal portion 422 of the second angle member 42 and the fourth horizontal portion 442 of the fourth angle member 44.

[0131] In the first embodiment, the first angle 41, the second angle 42, and the fifth angle 45 may be changed to split tees. The third angle 43, the fourth angle 44, and the sixth angle 46 may be changed to split tees.

[0132] - 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.

[0133] 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 described above can be obtained.

[0134] In the second embodiment, the first spacer piece 711 and the third spacer piece 713 may be connected to each other. The second spacer piece 712 and the fourth spacer piece 714 may be connected to each other.

[0135] This specification discloses the following technology: [Supplementary Note 1] A connection structure for steel members, comprising: a steel cross member having a cross member web, a first cross member flange, and a second cross member flange and extending in a horizontal direction; a steel column having a column web, a first column flange, and a second column flange and extending in a vertical direction; a connection member connecting the first cross member flange to the column; and a spacer arranged between the connection 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 and a second main gap is provided between the first cross member flange and the second column flange.

[0136] [Supplementary Note 2] In the steel connection structure described in Supplementary Note 1, the connection member comprises a first angle having a first vertical portion extending along a first inner surface that is an inner surface of the first column flange and is located on one side of the column web, and a first horizontal portion that is perpendicular to the first vertical portion and extends along the first cross-member flange; a second angle having a second vertical portion extending along a second inner surface that is an inner surface of the first column flange and is located on the other side of the column web, and a second horizontal portion that is perpendicular to the second vertical portion and extends along the first cross-member flange; a third vertical portion extending along a third inner surface that is an inner surface of the second column flange and is located on one side of the column web, and a second horizontal portion that is perpendicular to the third vertical portion and extends along the first cross-member flange; a third angle having a third horizontal portion extending along the first cross member flange; a fourth angle having a fourth vertical portion extending along a fourth inner surface of the second column flange that is located on the other side of the column web, and a fourth horizontal portion perpendicular to the fourth vertical portion and extending along the first cross member flange; a fifth angle having a fifth vertical portion extending along a first outer surface of the first column flange and a fifth horizontal portion perpendicular to the fifth vertical portion and extending along the first cross member flange; 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 perpendicular to the sixth vertical portion and extending along the first cross member flange.

[0137] [Appendix 3] In the steel connection structure described in Appendix 1, the connection member is a plate member to which the end of the column in the extension direction is welded, and the connection member is provided with a pair of slits located on both sides of the column web in the thickness direction of the column web and extending along the column web.

[0138] [Supplementary Note 4] In the steel 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 opposite side of the column web across the first column flange in the extending direction of the cross member, and a third connection portion located on the opposite side of the column web across the second column flange in the extending direction of the cross member, and the spacer comprises a first spacer member arranged between the first connection portion and the first cross member flange, and a second spacer member arranged between the second connection portion and the The structure has a second spacer member arranged between the first cross member flange and a third spacer member arranged between the third connection portion and the first cross member flange, and 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, and a fourth sub-gap communicating with the second main gap is provided between the third connection portion and the first cross member flange.

[0139] [Appendix 5] In the steel connection structure described in Appendix 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.

[0140] [Appendix 6] In the steel connection structure described in Appendix 5, the cross member has a first stiffener that overlaps the first column flange in the vertical direction and serves as the stiffener, and a second stiffener that overlaps the second column flange in the vertical direction.

[0141] [Appendix 7] A building having a steel connection structure according to any one of Appendices 1 to 6. [Appendix 8] The building according to Appendices 7, comprising: a first skeleton structure having first columns and first beams; and a second skeleton structure having second columns and second beams and provided on the first skeleton structure, wherein the first skeleton structure is a column-based rigid frame structure in which the first columns pass through with priority over the first beams at the intersections between the first columns and the first beams, and the second skeleton structure is a beam-based rigid frame structure in which the second beams pass with priority over the second columns at the intersections between the second columns and the second beams, and the cross members are the first beams and the columns are the second columns.

[0142] DESCRIPTION OF SYMBOLS 10...Steel connection structure, 11...First column, 12...First beam as beam, 13...Second column as column, 15...Second beam, 16...Connection member, 17...Spacer, 20...Beam web as cross member web, 21...First beam flange as first cross member flange, 22...Second beam flange as second cross 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 connecting portion, 62...second connecting portion, 63...third connecting 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, 4 22...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 in a horizontal direction; a steel column having a column web, a first column flange, and a second column flange, and extending in a vertical direction; a connection member connecting the first cross member flange and the column; and a spacer arranged between the connection 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, and a second main gap is provided between the first cross member flange and the second column flange.

2. The connecting member comprises a first angle having a first vertical portion extending along a first inner surface of the first column flange located on one side of the column web, and a first horizontal portion extending along the first cross member flange, perpendicular to the first vertical portion; a second angle having a second vertical portion extending along a second inner surface of the first column flange located on the other side of the column web, and a second horizontal portion extending along the first cross member flange, perpendicular to the second vertical portion; a third angle having a third vertical portion extending along a third inner surface of the second column flange located on one side of the column web, and a third horizontal portion extending along the first cross member flange, perpendicular to the third vertical portion; and a fourth angle having a fourth vertical portion extending along a fourth inner surface of the second column flange located on the other side of the column web, and a fourth horizontal portion extending along the first cross member flange, perpendicular to the fourth vertical portion.

2. The steel connection structure according to claim 1, comprising: a fifth angle having a fifth vertical portion extending along a first outer surface of the first column flange and a fifth horizontal portion perpendicular to the fifth vertical portion and extending along the first cross member flange; 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 perpendicular to the sixth vertical portion and extending along the first cross member flange.

3. A steel connection structure as described in claim 1, wherein the connection member is a plate member to which the end in the extension direction of the column is welded, and the connection member is provided with a pair of slits located on both sides of the column web in the thickness direction of the column web and extending along the column web.

4. 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 opposite side of the column web across the first column flange in the extending direction of the cross member, and a third connection portion located on the opposite side of the column web across the second column flange in the extending direction of the cross member; the spacer has a first spacer member arranged between the first connection portion and the first cross member flange, a second spacer member arranged between the second connection portion and the first cross member flange, and a third spacer member arranged 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, and a third sub-gap communicating with the first main gap is provided between the second connection portion and the first cross member flange; A steel connection structure as described in any one of claims 1 to 3, wherein a fourth sub-gap communicating with the second main gap is provided between the third connection portion and the first cross member flange.

5. A steel connection structure as described in any one of claims 1 to 4, wherein 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.

6. A steel connection structure as described in claim 5, wherein the cross member has a first stiffener that overlaps vertically with the first column flange, and a second stiffener that overlaps vertically with the second column flange.

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

8. A building as described in claim 7, comprising: a first structural body having a first column and a first beam; and a second structural body having a second column and a second beam and provided on the first structural body, wherein the first structural body is a column-oriented rigid frame structure in which the first column has priority over the first beam at the intersection between the first column and the first beam; and the second structural body is a beam-oriented rigid frame structure in which the second beam has priority over the second column at the intersection between the second column and the second beam, and the cross member is the first beam and the column is the second column.

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