Frame structure

Abstract

To provide a frame structure capable of improving axial strength, flexural strength and flexural rigidity of the entire frame including two columns which are coupled H-shaped steels.SOLUTION: A frame structure comprises a first column which is an H-shaped steel, a second column which is the H-shaped steel and is arranged next to the first column, and a third column coupling the first column and the second column and extending in the same direction as a longitudinal direction of the first column. The thickness directions of a flange of the first column and the flange of the second column are parallel to the direction in which the first column and the second column are aligned. The third column comprises a column body which is made of concrete, a main reinforcement embedded in the column body and a hoop embedded in the column body. The column body covers a pair of flanges and a web of the first column and the pair of flanges and the web of the second column and does not cover the H-shaped steel except for the first column and the second column, and the outer diameter of a cross section cut in the cross section orthogonal to the longitudinal direction is in a rectangular shape. The plurality of main reinforcements are arranged enclosing the first column and the second column and the hoop is arranged enclosing the plurality of main reinforcements.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a framed structure. [Background technology]

[0002] In buildings, large columns are sometimes used to increase rigidity. In this case, the portion of the pillar that protrudes from the wall becomes large, which restricts the use of the interior space. For example, Patent Document 1 describes a technology for suppressing the overhang of columns from the wall surface. Patent Document 1 describes a connecting column having a pair of connected H-shaped steel beams. do. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-69839 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the slenderness ratio around the weak axis of the H-shaped steel tends to be large, so the axis of the two connected columns It is difficult to improve the strength (buckling strength). Also, the moment of inertia around the weak axis of the H-shaped steel is Therefore, it is necessary to improve the bending strength and bending rigidity of the two connected columns. It's difficult.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and provides a method for manufacturing a steel structure having two connected H-shaped steel beams. A structural frame that can improve the axial strength, bending strength, and bending rigidity of the entire structure, including the columns. The purpose of this document is to provide a structure. [Means for solving the problem]

[0006] In order to achieve the above object, a frame structure according to one embodiment of the present disclosure includes a first column which is an H-shaped steel, A second column is an H-shaped steel and is arranged next to the first column, and connects the first column and the second column. and a third column extending in the same direction as the longitudinal direction of the first column, The thickness direction of the flange of the first pillar and the flange of the second pillar is parallel to the direction in which the first pillar and the second pillar are arranged. The cross section of the third pillar with respect to an axis parallel to the direction in which the first pillar and the second pillar are arranged is The second moment is smaller than the second moment of area of ​​the first and second columns about the axis. big.

[0007] As a preferred embodiment of the above frame structure, the third column has a column body made of concrete. Prepare.

[0008] As a preferred embodiment of the above frame structure, the column body is a pair of flanges of the first column. and web, as well as a pair of flanges and web of the second pillar.

[0009] As a preferred embodiment of the above frame structure, the third column is an H-shaped steel, and The thickness direction of the flange is perpendicular to the thickness direction of the flange of the first pillar.

[0010] As a preferred embodiment of the above frame structure, the depth parallel to the thickness direction of the web of the first pillar is the length of the third pillar in the direction is the length of the flange of the first pillar in the depth direction, and is equal to or less than the length of the flange of the second pillar in the depth direction.

[0011] As a preferred embodiment of the above frame structure, in the longitudinal direction of the first pillar, The length of the first pillar and the second pillar is equal to or less than the length of the first pillar and the second pillar. Effect of the Invention

[0012] According to the frame structure disclosed in the present disclosure, the axial resistance of the entire frame including the two columns, which are connected H-shaped steel, is The strength, bending strength, and bending rigidity can be improved. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a front view of a frame structure according to an embodiment. [Diagram 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Diagram 3] FIG. 3 is a cross-sectional view taken along line BB in FIG. [Figure 4] FIG. 4 is a front view of the frame structure of the first modified example. [Diagram 5] FIG. 5 is a cross-sectional view taken along line CC in FIG. [Figure 6] FIG. 6 is a front view of the frame structure of the second modified example. [Figure 7] FIG. 7 is a front view of the frame structure of the third modified example. [Figure 8] FIG. 8 is a cross-sectional view taken along line DD in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The present invention will be described in detail below with reference to the drawings. The present invention is not limited to the embodiments. The components in the form include those that a person skilled in the art can easily imagine, those that are substantially the same, or Furthermore, the components disclosed in the following embodiments may be appropriately combined. It is possible to match.

[0015] (Embodiment) FIG. 1 is a front view of the frame structure of the embodiment. FIG. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 3 is a cross-sectional view taken along the line BB in FIG. 2. The frame structure 100 is used as a structure for buildings. The frame structure 100 is a structure that supports floors and the like with columns and beams. It is made of.

[0016] As shown in FIG. 1 and FIG. 2, the frame structure 100 includes a first column 10, a second column 20, and a beam 4. 0, a rib 15, a rib 25, a stud 19, a stud 29, and a third post 30. The longitudinal direction of the first pillar 10 and the second pillar 20 is parallel to the vertical direction. The second columns 20 are arranged side by side in the horizontal direction. The beam 40 is arranged so that the first columns 10 and the second columns 20 are arranged side by side. The frame structure 100 includes a first column 10 and a second column 20 that are connected to each other. The structure comprises a number of pillars supporting the building and a number of beams 40 connecting the pillars to each other.

[0017] In the following description, XYZ orthogonal coordinate axes are used. The X axis represents the first column 10 and the second column 11. The Z axis is parallel to the longitudinal direction of the first column 10 and the second column 20. The Y axis is perpendicular to the X and Z axes. The direction parallel to the X axis is The direction parallel to the Y axis is called the Y direction. The direction parallel to the Z axis is called the This is referred to as the Z direction. Of the X directions, the direction from the first pillar 10 to the second pillar 20 is referred to as the +X direction. The right direction when facing the +X direction is the +Y direction. The upward direction in the Z direction is the +Z direction. The direction is as follows.

[0018] As shown in FIG. 1, the first pillar 10 extends along the Z direction. The longitudinal direction of the first pillar 10 is The water pressure of the first column 10 is parallel to the Z direction. As shown in FIG. 2, the first column 10 is an H-shaped steel. The horizontal cross section is H-shaped. The first column 10 has a flange 11, a flange 12, and a web 13. The thickness direction (plate thickness direction) of the flange 11 is parallel to the X direction. means a direction perpendicular to the surface of the plate-like member having the largest area, and in the following description, The thickness direction of the flange 12 is parallel to the X direction. The flange 12 is parallel to the flange 11. The thickness direction of the web 13 is parallel to the Y direction. The web 13 is perpendicular to the flanges 11 and 12 .

[0019] As shown in FIG. 1, the second pillar 20 extends along the Z direction. The longitudinal direction of the second pillar 20 is The second column 20 is an H-shaped steel. The horizontal cross section of the second column 20 is H-shaped. The second pillar 20 is disposed next to the first pillar 10 in the X direction. The flange 21 has a thickness direction of: The flange 21 faces the flange 12 of the first column 10. The thickness direction of flange 2 is parallel to the X direction. Flange 22 is parallel to flange 21. The thickness direction of the web 23 is parallel to the Y direction. It is perpendicular to 22.

[0020] In the first column 10 and the second column 20, the rigidity against bending moment around the Y axis is The rigidity against bending moment around the first column 10 and the second column 20 is higher than that of the Y The bending moment around the axis is called the bending moment around the strong axis. In the column 20, the bending moment about the X-axis is called the bending moment about the weak axis.

[0021] As shown in FIG. 1, the beam 40 extends along the X direction. The beam 40 is an H-shaped steel. The vertical cross section of the beam 40 is H-shaped. The beam 40 is The flange 41 has a flange 42 and a web 43. The thickness direction of the flange 41 is , is parallel to the Z direction. The thickness direction of the flange 42 is parallel to the Z direction. The thickness direction of the web 43 is parallel to the Y direction. 43 is perpendicular to the flange 41 and the flange 42. The beam 40 is connected to the first column 10 and The beam 40 is joined to the first column 10 and the second column 20 by, for example, welding. One end of the beam 40 is joined to the first column 10. The other end of the beam 40 is joined to the second column 20. do.

[0022] In a building to which the frame structure 100 is applied, a wall is made up of a first column 10, a second column 20 and a beam. 40. In other words, the walls of the building are arranged along the plane formed by the XZ plane. The thickness direction of the building wall is parallel to the Y direction.

[0023] 1, the rib 15 is a flat plate-shaped member. The thickness direction of the rib 15 is the Z direction. The rib 15 is parallel to the flange 11, the flange 12, and the web 13. The rib 15 is connected to the flanges 11, 12 and welded together, for example, by welding. It is joined to B13.

[0024] As shown in FIG. 1, the position of one of the plurality of ribs 15 in the Z direction is The Z-direction position of one of the plurality of ribs 15 is the same as the Z-direction position of the beam 4 0 of the flange 42 in the Z direction. That is, one of the multiple ribs 15 overlaps with the flange 41 or the flange 42 when viewed in the YZ plane.

[0025] 1, the rib 25 is a flat plate-shaped member. The thickness direction of the rib 25 is the Z direction. The rib 25 is parallel to the flange 21, the flange 22, and the web 23. The rib 25 is fixed to the flanges 21, 22 and welded to each other by, for example, welding. It is joined to bore 23.

[0026] As shown in FIG. 1, the position of one of the plurality of ribs 25 in the Z direction is The Z-direction position of one of the plurality of ribs 25 is the same as the Z-direction position of the beam 4 0 of the flange 42 in the Z direction. That is, one of the multiple ribs 25 overlaps with the flange 41 or the flange 42 when viewed in the YZ plane.

[0027] As shown in FIG. 2, the stud 19 is provided on the first post 10. The stud 19 is The stud 19 protrudes from the flange 12 in the +X direction. As shown in FIG. 2 and FIG. 3, the plurality of studs 19 are arranged in the Y direction and the Z direction. It will be placed.

[0028] As shown in FIG. 2, the stud 29 is provided on the second post 20. The stud 29 is The stud 29 protrudes from the flange 21 in the -X direction. As shown in FIG. 2 and FIG. 3, the plurality of studs 29 are arranged in the Y direction and the Z direction. It will be placed.

[0029] As shown in FIG. 1, the third column 30 extends along the Z direction. The longitudinal direction of the third column 30 is 2, the length L3 of the third column 30 in the Y direction is The length L1 of the flange 11 (flange 12) in the Y direction and the length L2 of the flange 21 in the Y direction It is desirable that the length L2 of the flange 22 is equal to or less than the length L 3 is equal to length L1 and length L2. The second moment of area of ​​the third pillar 30 with respect to the X-axis is , which is greater than the second moment of area of ​​the first pillar 10 and the second pillar 20 with respect to the X-axis.

[0030] The third pillar 30 is a pillar of reinforced concrete (RC) structure. The column 30 includes a column body 31, a main bar 32, and a tie bar 33. The column body 31 is a concrete The cross section of the column body 31 cut along a plane perpendicular to the longitudinal direction ( The shape of the horizontal cross section is rectangular. The main reinforcement 32 and the tie bars 33 are embedded in the column body 31. The main reinforcement 32 is, for example, a deformed steel bar. The main reinforcement 32 extends along the Z direction. The longitudinal direction is parallel to the Z direction. The tie bars 33 are arranged to surround the multiple main bars 32. The hoop 33 is, for example, a deformed steel bar. The hoop 33 is also called a hoop.

[0031] As shown in FIG. 2 and FIG. 3, the stud 19 and the stud 29 are embedded in the column body 31. The stud 19 improves the joint strength between the third column 30 and the first column 10. The tads 29 improve the strength of the connection between the third post 30 and the second post 20 .

[0032] As described above, the frame structure 100 includes a first column 10 and a second column 20 that are connected to each other. The frame structure 100 uses fewer columns (the first column 10 and Therefore, according to the frame structure 100, This allows for greater freedom in using the interior space.

[0033] In the frame structure 100, the rib 15 and the rib 25 overlap with the beam 40 when viewed in the YZ plane. This allows the beam 40 to be attached to the first column 10 and the second column 20 in the X-direction. Deformation of the flange 11, the flange 12, the flange 21, and the flange 22 is suppressed. Therefore, the bending rigidity around the Y axis (strong axis) of the first column 10 and the second column 20 is improved. In the Z-plane view, the web 13 of the first column 10, the web 23 of the second column 20, and the web 43 of the beam 40 As a result, the bending rigidity of the first column 10 and the second column 20 around the Y axis (around the strong axis) is Further, in the frame structure 100, the first column 10 and the second column 20 are Z It continues without being interrupted by direction.

[0034] The frame structure 100 has the above-mentioned structure, and thus is resistant to horizontal deformation of the building caused by an earthquake. The deformation of the first column 10 and the second column 20 when a force is applied can be suppressed. This reduces the inter-story displacement (the horizontal displacement of the upper floor relative to the lower floor). 00 can improve earthquake resistance.

[0035] The third column 30 does not necessarily have to be a column of reinforced concrete structure. For example, the third column 30 may be made of steel. The third column 30 may be made of steel reinforced concrete (SRC). In addition, in the Z direction, the third column 30 is The upper end of the third column 30 may be shorter than the upper end of the second column 20. It may be placed in between.

[0036] As described above, the frame structure 100 of this embodiment includes the first column 10 and the second column 20. The first column 10 is an H-shaped steel. The second column 20 is The third column 30 is an H-shaped steel and is placed next to the first column 10. The third column 30 is connected to the first column 10 and the second column 20. The flange of the first pillar 10 connects the first pillar 10 and extends in the same direction as the longitudinal direction of the first pillar 10. The thickness direction of the flange 11 (flange 12) of the second column 20 and the flange 21 (flange 22) of the second column 20 is The direction in which the first pillar 10 and the second pillar 20 are arranged is parallel to the direction in which the first pillar 10 and the second pillar 20 are arranged. The second moment of area of ​​the third column 30 about an axis (X-axis) parallel to the 0 and is greater than the second moment of area of ​​the second pillar 20.

[0037] As a result, the third column 30 is arranged around an axis parallel to the direction in which the first column 10 and the second column 20 are arranged. Therefore, the deformation of the first column 10 and the second column 20 around the X-axis is suppressed. The axial strength (buckling strength) is improved. Also, the third column 30 bears the bending moment. Therefore, the bending strength and bending rigidity of the entire frame are improved. To improve the axial strength, bending strength, and bending rigidity of the entire structure, including the two steel columns. can be done.

[0038] In the frame structure 100, the third column 30 has a column body 31 made of concrete. .

[0039] As a result, the frame structure 100 is constructed so that the entire frame including the two connected H-shaped steel columns can be secured to the ground. The axial strength, bending strength, and bending rigidity can be further improved.

[0040] In the frame structure 100, the depth direction ( The length L3 of the third column 30 in the Y direction is the length L2 of the flange 11 of the first column 10 in the depth direction. The length L1 of the flange 12 and the flange 21 of the second column 20 in the depth direction It is preferable that the length of the wire 22 is equal to or less than L2.

[0041] As a result, in a building to which the frame structure 100 is applied, The frame structure 100 allows for more flexible use of the interior space. to.

[0042] It should be noted that the length L3 shown in FIG. 2 does not necessarily have to be equal to the length L1 and the length L2. The length L3 may be smaller or larger than the length L1 and the length L2. Also, the second moment of area of ​​the third column 30 with respect to the X-axis is It is sufficient if it is larger than the second moment of area of ​​the pillar 20.

[0043] (First Modification) Fig. 4 is a front view of the frame structure of the first modification; Fig. 5 is a cross-sectional view taken along line CC in Fig. 4; The same components as those described in the above embodiment are denoted by the same reference numerals. Duplicate explanations will be omitted.

[0044] As shown in FIG. 4 and FIG. 5, the frame structure 100A of the first modified example includes a connecting member 50 and a third As shown in FIG. 4, the connecting member 50 is an H-shaped steel. The cross section is H-shaped. The connecting member 50 includes a flange 51, a flange 52, and a web 53. The thickness direction of the flange 51 is parallel to the Z direction. is parallel to the Z direction. The flange 52 is parallel to the flange 51. The flange 52 is , overlapping with the flange 51 in the XY plane view. The thickness direction of the web 53 is parallel to the Y direction. The web 53 is perpendicular to the flanges 51 and 52. The position is the same as the Y-direction position of web 13, web 23 and web 43. 3 overlaps with the web 13, the web 23 and the web 43 when viewed in the YZ plane.

[0045] As shown in FIG. 4, the connecting member 50 is disposed between the first pillar 10 and the second pillar 20. The position of the member 50 in the Z direction is the same as the position of the beam 40 in the Z direction. The connecting member 50 is connected to the first column 10 and the second column 20 by, for example, welding. are combined.

[0046] As shown in Fig. 4, the third column 30A extends along the Z direction. is parallel to the Z direction. The second moment of area of ​​the third column 30A with respect to the X axis is The moment of inertia of the first pillar 10 and the second pillar 20 is larger than that of the second pillar 20.

[0047] The third column 30A is a column having a reinforced concrete (RC) structure. The third column 30A includes a column body 31A, a main bar 32A, and a tie bar 33A. A is concrete. A cross section of the column body 31A cut along a plane perpendicular to the longitudinal direction. The shape of the column body 31A (horizontal cross section) is rectangular. The column body 31A is the same as the frame of the first column 10. The flange 11, the flange 12 and the web 13, and the flange 21 of the second column 20, the flange 2 2 and the web 23. In the first modification, the pillar body 31A covers the entire first pillar 10. It covers the entire body and second pillar 20.

[0048] The main reinforcement 32A and the tie bars 33A are embedded in the column body 31A. The main reinforcement 32A extends along the Z direction. The main reinforcement 32A is a shaped steel bar. and is arranged to surround the second column 20. The longitudinal direction of the main reinforcement 32A is parallel to the Z direction. The tie bars 33A are, for example, deformed steel bars. The tie bars 33A are arranged so as to surround the multiple main reinforcements 32A. To be placed.

[0049] As described above, in the framed structure 100A of the first modified example, the column main body 31A is A pair of flanges (flanges 11 and 12) and a web 13 of the first column 10, and A pair of flanges (flanges 21 and 22) of the second column 20 and a web 23 are covered. do.

[0050] As a result, the first pillar 10 and the second pillar 20 are more firmly attached than in the above-described embodiment. The third pillar 30A is arranged around an axis parallel to the direction in which the first pillar 10 and the second pillar 20 are arranged. The deformation of the first column 10 and the second column 20 (around the X-axis) is further suppressed. The axial strength of the third column 30A is improved. Also, the third column 30A bears the bending moment. The overall bending strength and bending rigidity are improved. The frame structure 100A is made of connected H-shaped steel. The axial strength, bending strength, and bending rigidity of the entire structure including the two columns can be improved. do.

[0051] (Second Modification) FIG. 6 is a front view of the frame structure of the second modified example. The same components are designated by the same reference numerals and duplicated explanations are omitted.

[0052] As shown in FIG. 6, the frame structure 100B of the second modified example includes a third column 30B. The pillar 30B extends along the Z direction. The longitudinal direction of the third pillar 30B is parallel to the Z direction. In the Z direction, the length of the third pillar 30B is equal to or less than the lengths of the first pillar 10 and the second pillar 20. For example, in the frame structure 100B, the length of the third column 30B is the same as that of the first column 10 and the second column 2. 0. In other words, in the Z direction, the third column 30B is shorter than the length of the first column 10 and The third pillar 30B is shorter than the second pillar 20. The third pillar 30B covers a part of the first pillar 10 and a part of the second pillar 20. The upper end of the third pillar 30B is disposed between two beams 40 arranged in the Z direction. The internal structure of B is the same as that of the third pillar 30A of the first modified example.

[0053] As described above, in the frame structure 100B of the second modified example, the first column 10 has a longitudinal direction In the Z direction, the length of the third column 30B is less than or equal to the lengths of the first column 10 and the second column 20. do.

[0054] As a result, the frame structure 100B is easier to use than the frame structure 100A of the first modified example. The amount of concrete used can be reduced. The length of the part protruding from the upper end of OB is shorter than the total length of the first pillar 10 and the second pillar 20. Therefore, the portion of the first pillar 10 and the second pillar 20 that protrudes from the upper end of the third pillar 30B The axial strength, bending strength, and bending rigidity of the third column 30B are greater than those in the case where the third column 30B is not provided.

[0055] (Third Modification) Fig. 7 is a front view of the frame structure of the third modified example. Fig. 8 is a cross-sectional view taken along line DD in Fig. 7. The same components as those described in the above embodiment are denoted by the same reference numerals. Duplicate explanations will be omitted.

[0056] As shown in FIG. 7, the frame structure 100C of the third modified example includes a third column 30C. The pillars 30 extend along the Z direction. The longitudinal direction of the third pillar 30C is parallel to the Z direction. The second moment of area of ​​the third column 30C with respect to the axis is the second moment of area of ​​the first column 10 and the second column 2 with respect to the X axis. The second moment of area of ​​the third column 30C in the Y direction is greater than that of the third column 30C. It is preferable that the length L3C is equal to or less than the length L1 and the length L2. Length L1 and length L2 are equal.

[0057] The third column 30C is an H-shaped steel. The horizontal cross section of the third column 30C is H-shaped. 0C includes a flange 35, a flange 36, and a web 37. The thickness of the flange 35 is The thickness direction of the flange 36 is parallel to the Y direction. The flange 36 is parallel to the flange 35. The thickness direction of the flanges 35 and 36 is as follows: The flange 11 (flange 12) of the first column 10 and the flange 21 (flange 2) of the second column 20 The thickness direction of the web 37 is parallel to the X direction. The flange 37 is perpendicular to the flanges 35 and 36 .

[0058] The third column 30C is relatively strong against bending moment around the X-axis and relatively strong against bending moment around the Y-axis. In the third column 30C, the bending moment around the X-axis is relatively weak against the strong axis. In the third column 30C, the bending moment around the Y axis is weak. This is the bending moment around the axis.

[0059] The third column 30C is joined to the first column 10 and the second column 20 by, for example, welding. The end of the flange 35 in the -X direction is joined to the end of the flange 12 in the +Y direction. The +X end of the flange 36 is joined to the +Y end of the flange 21. The end of the flange 36 in the +X direction is joined to the end of the flange 12 in the -Y direction. The end is joined to the end of the flange 21 in the −Y direction.

[0060] In addition, the third column 30C may be shorter than the first column 10 and the second column 20 in the Z direction. The upper end of the third pillar 30C may be disposed between two beams 40 aligned in the Z direction.

[0061] As described above, in the frame structure 100C of the third modified example, the third column 30C is an H-shaped The flange 35 (flange 36) of the third column 30C is made of steel. The direction is perpendicular to the thickness direction of the flange 11 (flange 12).

[0062] As a result, the third column 30C is arranged along an axis parallel to the direction in which the first column 10 and the second column 20 are arranged. Therefore, the deformation of the first column 10 and the second column 20 around the center axis (around the X-axis) is suppressed. The axial strength (buckling strength) of the third column 30C is improved. Also, the third column 30C bears the bending moment. Therefore, the bending strength and bending rigidity of the entire frame are improved. The axial strength, bending strength, and bending rigidity of the entire structure, including the two H-shaped steel columns, were improved. It is possible.

[0063] In the frame structure 100C, the depth direction parallel to the thickness direction of the web 13 of the first column 10 The length L3C of the third column 30C in the Y direction is the length of the flange of the first column 10 in the depth direction. The length L1 of the flange 12 of the second column 20 in the depth direction The length of the flange 22) is equal to or less than L2.

[0064] As a result, in a building to which the frame structure 100C is applied, the wall surface of the third column 30C The frame structure 100C allows for more flexible use of the interior space. This makes it possible. [Explanation of symbols]

[0065] 10 Pillar 1 11, 12 Flange 13. Web 15 Ribs 19 Stud 21, 22 Flange 23 Web 25 Ribs 29 Stud 30, 30A, 30B, 30C Pillar 3 31, 31A Pillar body 32, 32A Main reinforcement 33, 33A stirrup 35, 36 flange 37 Web 40 Beam 41, 42 Flange 43 Web 50 Connecting material 51, 52 Flange 53 Web 100, 100A, 100B, 100C frame structure

Claims

1. The first column is an H-shaped steel. A second column which is an H-shaped steel and is disposed adjacent to the first column; a third pillar extending in the same direction as the longitudinal direction of the first pillar; A beam that is an H-shaped steel whose flange thickness direction is parallel to the Z direction and extends in a direction perpendicular to the longitudinal direction of the first column; A connecting member is an H-shaped steel in which the thickness direction of the flange is parallel to the Z direction, and is disposed between the first column 10 and the second column 20, and is connected to the first column 10 and the second column 20 at the same position in the Z direction as the beam; Equipped with a thickness direction of the flange of the first pillar and the flange of the second pillar is parallel to a direction in which the first pillar and the second pillar are arranged, The third column comprises a column body made of concrete, a main bar embedded in the column body, and a tie bar embedded in the column body, The column body covers a pair of flanges and a web of the first column and a pair of flanges and a web of the second column, does not cover H-shaped steel extending in the longitudinal direction of the first column other than the first column and the second column, and has an outer diameter of a cross section cut perpendicular to the longitudinal direction, the outer diameter being rectangular; The plurality of main reinforcements are arranged surrounding the first column and the second column, The tie bars are arranged around the plurality of main bars. Frame structure.

2. The second moment of area of ​​the third pillar about an axis parallel to a direction in which the first pillar and the second pillar are arranged is larger than the second moment of area of ​​the first pillar and the second pillar about the axis. The frame structure according to claim 1.

3. The plurality of main reinforcements surround the first column and the second column and are disposed on the first column and the second column. A frame structure according to claim 1 or 2.

4. In the column body, the length in the direction in which the first column and the second column are arranged is longer than the length in the direction perpendicular to the direction in which the first column and the second column are arranged on a plane perpendicular to the longitudinal direction of the first column. A framed structure according to any one of claims 1 to 3.

5. In the longitudinal direction of the first pillar, the length of the third pillar is equal to or less than the lengths of the first pillar and the second pillar. A framed structure according to any one of claims 1 to 4.

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