JP2023126445A - frame structure - Google Patents

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

Application for application of Article 30, Paragraph 2 of the Patent Act has been filed Architectural Institute of Japan Conference Academic Lecture Abstracts (Tohoku) September 2018, pages 831-840, Architectural Institute of Japan Publication date July 20, 2018 2018 Architectural Institute of Japan Annual Conference (Tohoku) Tohoku University Kawauchi Kita Campus (41 Kawauchi, Aoba-ku, Sendai, Miyagi Prefecture) Date: September 4, 2018

TECHNICAL FIELD The present invention relates to frame-based structures.

Large columns are sometimes used in buildings to increase rigidity. However, in this case, the portion of the pillar that protrudes from the wall surface becomes large, which may restrict the use of indoor space. For example, as a technique for suppressing the overhang from the wall surface of columns, Patent Document 1
can be mentioned. Patent Document 1 describes a connecting column including a pair of connected H-shaped steels.

Unexamined Japanese Patent Publication No. 2016-69839

However, since the slenderness ratio around the weak axis of the H-shaped steel tends to increase, it is difficult to improve the axial strength (buckling strength) of the two connected columns. Furthermore, since the moment of inertia of the H-section steel around the weak axis tends to be small, it is difficult to improve the bending strength and bending rigidity of the two connected columns.

The present disclosure has been made in view of the above problems, and is a frame structure that can improve the axial strength, bending strength, and bending rigidity of the entire frame including two columns that are connected H-shaped steel. The purpose is to provide structure.

In order to achieve the above object, a frame structure according to one aspect of the present disclosure includes a first column that is an H-beam steel;
a second column that is made of H-shaped steel and is placed next to the first column; and a third column that connects the first column and the second column and extends 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 lined up, and A moment of inertia of area of the third column with respect to an axis parallel to the direction in which the lines are arranged is larger than a moment of inertia of area of the first column and the second column with respect to the axis.

In a desirable embodiment of the above-mentioned frame structure, the third pillar includes a pillar body made of concrete.

In a desirable embodiment of the above-mentioned frame structure, the column main 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.

As a desirable aspect of the above-mentioned frame structure, the third column is made of H-beam steel, and the thickness direction of the flange of the third column is orthogonal to the thickness direction of the flange of the first column.

As a desirable aspect of the above-mentioned frame type structure, the length of the third column in the depth direction parallel to the thickness direction of the web of the first column is the length of the flange of the first column in the depth direction,
and the length of the flange of the second pillar in the depth direction or less.

As a desirable aspect of the above-mentioned frame type structure, in the longitudinal direction of the first column, the length of the third column is equal to or less than the lengths of the first column and the second column.

According to the frame structure of the present disclosure, it is possible to improve the axial yield strength, bending yield strength, and bending rigidity of the entire frame including two pillars that are connected H-section steel.

FIG. 1 is a front view of the frame structure of the embodiment. FIG. 2 is a sectional view taken along line AA in FIG. FIG. 3 is a sectional view taken along line BB in FIG. FIG. 4 is a front view of the frame type structure of the first modification. FIG. 5 is a cross-sectional view taken along line CC in FIG. FIG. 6 is a front view of the frame type structure of the second modification. FIG. 7 is a front view of the frame type structure of the third modification. FIG. 8 is a sectional view taken along line DD in FIG.

Hereinafter, the present invention will be explained in detail with reference to the drawings. Note that the present invention is not limited to the modes for carrying out the present invention (hereinafter referred to as embodiments). Furthermore, the constituent elements in the embodiments below include those that can be easily imagined by those skilled in the art, those that are substantially the same, and those that are within the so-called equivalent range. Furthermore, the components disclosed in the embodiments below can be combined as appropriate.

(Embodiment)
FIG. 1 is a front view of the frame structure of the embodiment. FIG. 2 is a sectional view taken along line AA in FIG. FIG. 3 is a sectional view taken along line BB in FIG. The frame type structure 100 of this embodiment is used as a structure of a building. The frame type structure 100 is a structure in which a floor and the like are supported by columns and beams.

As shown in FIGS. 1 and 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 pillar 30. The longitudinal direction of the first pillar 10 and the second pillar 20 is parallel to the vertical direction. The first pillar 10 and the second pillar 20 are arranged side by side in the horizontal direction. The beam 40 extends along the direction in which the first pillar 10 and the second pillar 20 are lined up. The frame type structure 100 is a structure that includes a plurality of columns including a first column 10 and a second column 20 that are connected, and a plurality of beams 40 that connect the columns.

In the following description, XYZ orthogonal coordinate axes are used. The X axis is the first pillar 10 and the second pillar 10.
This is an axis parallel to the direction in which the pillars 20 are lined up. The Z axis is an axis parallel to the longitudinal direction of the first pillar 10 and the second pillar 20. The Y-axis is an axis perpendicular to the X-axis and the Z-axis. The direction parallel to the X axis is
It is described as the X direction. A direction parallel to the Y axis is described as a Y direction. The direction parallel to the Z axis is
It is described as the Z direction. Among the X directions, the direction from the first pillar 10 to the second pillar 20 is defined as the +X direction. The right direction when facing the +X direction is the +Y direction. The upper direction of the Z direction is defined as the +Z direction.

As shown in FIG. 1, the first pillar 10 extends along the Z direction. The longitudinal direction of the first pillar 10 is
It is parallel to the Z direction. As shown in FIG. 2, the first column 10 is an H-beam steel. The horizontal cross section of the first pillar 10 is H-shaped. The first pillar 10 includes a flange 11, a flange 12, and a web 13.
and. The thickness direction (plate thickness direction) of the flange 11 is parallel to the X direction. The thickness direction means the direction perpendicular to the surface with the largest area in the plate member, and is used in the same meaning in the following description. The thickness direction of the flange 12 is parallel to the X direction. Flange 12 is parallel to 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.

As shown in FIG. 1, the second pillar 20 extends along the Z direction. The longitudinal direction of the second pillar 20 is
It is parallel to the Z direction. The second pillar 20 is an H-shaped steel. The horizontal cross section of the second pillar 20 is H-shaped. The second pillar 20 is arranged adjacent to the first pillar 10 in the X direction. The second pillar 20 includes a flange 21, a flange 22, and a web 23. The thickness direction of the flange 21 is
It is parallel to the X direction. The flange 21 faces the flange 12 of the first column 10. Flange 2
The thickness direction of No. 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. The web 23 is perpendicular to the flanges 21 and 22.

In the first column 10 and the second column 20, the rigidity against a bending moment around the Y-axis is higher than the rigidity against a bending moment around the X-axis. In the first pillar 10 and the second pillar 20, Y
The bending moment about the axis is called the bending moment about the strong axis. 1st pillar 10 and 2nd pillar
In the column 20, the bending moment about the X-axis is called the bending moment about the weak axis.

As shown in FIG. 1, the beam 40 extends along the X direction. The longitudinal direction of the beam 40 is parallel to the X direction. The beam 40 is an H-section steel. The vertical cross section of the beam 40 is H-shaped. The beam 40 is
It includes a flange 41, a flange 42, and a web 43. The thickness direction of the flange 41 is parallel to the Z direction. The thickness direction of the flange 42 is parallel to the Z direction. Flange 42
is parallel to the flange 41. The thickness direction of the web 43 is parallel to the Y direction. Web 43 is orthogonal to flange 41 and flange 42 . The beam 40 is joined to the first column 10 and the second column 20. 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 pillar 10. The other end of the beam 40 is joined to the second pillar 20.

In a building to which the frame structure 100 is applied, a wall is provided along a plane formed by the first pillar 10, the second pillar 20, and the beam 40. That is, the walls of the building are parallel to the XZ plane. The thickness direction of the building wall is parallel to the Y direction.

As shown in FIG. 1, the rib 15 is a flat member. The thickness direction of the rib 15 is parallel to the Z direction. The ribs 15 are orthogonal to each of the flanges 11, 12 and webs 13. The rib 15 is joined to the flange 11, flange 12 and web 13, for example by welding.

As shown in FIG. 1, the position of one of the plurality of ribs 15 in the Z direction is the same as the position of the flange 41 of the beam 40 in the Z direction. The position of one of the plurality of ribs 15 in the Z direction is
This is the same position in the Z direction of the flange 42 of No. 0. That is, one of the plurality of ribs 15 overlaps with the flange 41 or 42 in the YZ plane view.

As shown in FIG. 1, the rib 25 is a flat member. The thickness direction of the rib 25 is parallel to the Z direction. The rib 25 is orthogonal to each of the flanges 21, 22, and webs 23. Rib 25 is joined to flange 21, flange 22 and web 23, for example by welding.

As shown in FIG. 1, the position of one of the plurality of ribs 25 in the Z direction is the same as the position of the flange 41 of the beam 40 in the Z direction. The position of one of the plurality of ribs 25 in the Z direction is
This is the same position in the Z direction of the flange 42 of No. 0. That is, one of the plurality of ribs 25 overlaps with the flange 41 or 42 in the YZ plane view.

As shown in FIG. 2, the stud 19 is provided on the first post 10. The stud 19 projects from the flange 12 in the +X direction. Stud 19 is joined to flange 12 by, for example, welding. As shown in FIGS. 2 and 3, the plurality of studs 19 are arranged in the Y direction and the Z direction.

As shown in FIG. 2, the stud 29 is provided on the second post 20. The stud 29 projects from the flange 21 in the −X direction. The stud 29 is joined to the flange 21 by, for example, welding. As shown in FIGS. 2 and 3, the plurality of studs 29 are arranged in the Y direction and the Z direction.

As shown in FIG. 1, the third pillar 30 extends along the Z direction. The longitudinal direction of the third pillar 30 is
It is parallel to the Z direction. As shown in FIG. 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 L1 of the flange 21 in the Y direction.
It is desirable that the length (of the flange 22) is equal to or less than L2. In this embodiment, the length L
3 is equal to length L1 and length L2. The moment of inertia of the third column 30 with respect to the X-axis is larger than the moment of inertia of the first column 10 and the second column 20 with respect to the X-axis.

The third column 30 is a column with a reinforced concrete (RC) structure. The third column 30 includes a column body 31, a main reinforcement 32, and a tie bar 33. The column body 31 is made of concrete. The shape of a cross section (horizontal cross section of the column body 31) taken by cutting the column body 31 along a plane perpendicular to the longitudinal direction is rectangular.The main reinforcement 32 and the tie reinforcement 33 are embedded in the column body 31.The main reinforcement 32 is, for example, a deformed steel bar. The main reinforcing bars 32 extend along the Z direction. The longitudinal direction of the main reinforcing bars 32 is parallel to the Z direction. The tie bars 33 are arranged so as to surround the plurality of main reinforcing bars 32. The tie bar 33 is, for example, a deformed steel bar.The tie bar 33 is also called a hoop.

As shown in FIGS. 2 and 3, the studs 19 and 29 are embedded in the column body 31. The stud 19 improves the bonding strength between the third pillar 30 and the first pillar 10. The stud 29 improves the joint strength between the third pillar 30 and the second pillar 20.

As described above, the frame type structure 100 includes the first pillar 10 and the second pillar 20 that are connected. The frame type structure 100 can suppress the protrusion of the pillars (the first pillar 10 and the second pillar 20) from the wall surface, compared to the case where one large pillar is used. Therefore, according to the frame structure 100,
It is possible to use the indoor space more freely.

In the frame structure 100, the ribs 15 and 25 overlap the beams 40 in the YZ plane view. This suppresses deformation of the flanges 11, 12, 21, and 22 when a load in the X direction is applied from the beam 40 to the first column 10 and the second column 20. Therefore, the bending rigidity of the first column 10 and the second column 20 around the Y axis (around the strong axis) is improved. Also, Y
Web 13 of first column 10, web 23 of second column 20, and web 43 of beam 40 in Z plane view
overlap. This further improves the bending rigidity of the first column 10 and the second column 20 around the Y axis (around the strong axis). Furthermore, in the frame structure 100, the first pillar 10 and the second pillar 20 are
Continuous without being divided by direction.

By having the above-described structure, the frame type structure 100 can suppress deformation of the first column 10 and the second column 20 when a horizontal force is applied to the building due to an earthquake. The frame structure 100 can reduce interstory displacement (relative horizontal displacement of the upper floor with respect to the lower floor). Frame structure 1
00 can improve earthquake resistance.

The third pillar 30 does not necessarily have to be a pillar of RC structure. For example, the third pillar 30 may be made of steel. The third pillar 30 is made of steel reinforced concrete (SRC).
crete) may be the pillars of the structure. Furthermore, the third pillar 30 may be shorter than the first pillar 10 and the second pillar 20 in the Z direction. The upper end of the third pillar 30 may be arranged between two beams 40 aligned in the Z direction.

As explained above, the frame type structure 100 of this embodiment includes the first column 10 and the second column 20.
, a third pillar 30, and a beam 40. The first pillar 10 is an H-section steel. The second pillar 20 is
It is an H-shaped steel and is placed next to the first column 10. The third pillar 30 connects the first pillar 10 and the second pillar 20, and extends along the same longitudinal direction as the first pillar 10. The thickness direction of the flange 11 (flange 12) of the first column 10 and the flange 21 (flange 22) of the second column 20 is parallel to the direction in which the first column 10 and the second column 20 are lined up. The moment of inertia of the third column 30 with respect to the axis (X-axis) parallel to the direction in which the first column 10 and the second column 20 are lined up is the moment of inertia of the first column 1 with respect to the X-axis.
0 and the moment of inertia of the second column 20.

Thereby, the third pillar 30 suppresses deformation of the first pillar 10 and the second pillar 20 around an axis parallel to the direction in which the first pillar 10 and the second pillar 20 are lined up (around the X axis). Therefore, the axial strength (buckling strength) of the entire frame is improved. Further, the third pillar 30 bears the bending moment. Therefore, the bending strength and bending rigidity of the entire frame are improved. The frame structure 100 includes connected H
It is possible to improve the axial strength, bending strength, and bending rigidity of the entire frame including the two shaped steel columns.

In the frame structure 100, the third column 30 includes a column body 31 made of concrete.

Thereby, the frame type structure 100 can further improve the axial yield strength, bending yield strength, and bending rigidity of the entire frame including the two pillars that are connected H-beams.

In the frame structure 100, the depth direction (
The length L3 of the third column 30 in the Y direction) is the length L3 of the third column 30 in the depth direction
It is preferable that the length L1 (of the flange 12) and the length L2 of the flange 21 (flange 22) of the second pillar 20 in the depth direction be equal to or less than.

Thereby, in a building to which the frame structure 100 is applied, it is possible to suppress the third pillar 30 from protruding from the wall surface. The frame structure 100 allows more free use of interior space.

Note that the length L3 shown in FIG. 2 does not necessarily have to be equal to the length L1 and the length L2.
Length L3 may be smaller or larger than length L1 and length L2. At least, the moment of inertia of the third column 30 with respect to the X-axis is
It only needs to be larger than the moment of inertia of the column 20.

(First modification)
FIG. 4 is a front view of the frame type structure of the first modification. FIG. 5 is a cross-sectional view taken along line CC in FIG. Note that the same components as those described in the embodiments described above are given the same reference numerals and redundant explanations will be omitted.

As shown in FIGS. 4 and 5, the frame type structure 100A of the first modification includes a connecting member 50 and a third
A pillar 30A is provided. As shown in FIG. 4, the connecting member 50 is an H-shaped steel. The vertical cross section of the connecting member 50 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. The thickness direction of the flange 52 is parallel to the Z direction. Flange 52 is parallel to flange 51. The flange 52 overlaps with the flange 51 in the XY plane view. The thickness direction of the web 53 is parallel to the Y direction.
Web 53 is perpendicular to flanges 51 and 52. The position of the web 53 in the Y direction is the same as the positions of the webs 13, 23, and 43 in the Y direction. web 5
3 overlaps with the web 13, web 23, and web 43 in YZ plane view.

As shown in FIG. 4, the connecting member 50 is arranged between the first pillar 10 and the second pillar 20. The position of the connecting member 50 in the Z direction is the same as the position of the beam 40 in the Z direction. The connecting member 50 overlaps the beam 40 in the YZ plane view. The connecting member 50 is joined to the first column 10 and the second column 20 by, for example, welding.

As shown in FIG. 4, the third pillar 30A extends along the Z direction. The longitudinal direction of the third pillar 30A is parallel to the Z direction. The moment of inertia of the third column 30A with respect to the X-axis is larger than the moment of inertia of the first column 10 and the second column 20 with respect to the X-axis.

The third column 30A is a column of reinforced concrete (RC) structure.
The third column 30A includes a column main body 31A, a main reinforcement 32A, and a tie reinforcement 33A. Pillar body 31
A is concrete. The shape of a cross section (horizontal cross section of the column body 31A) taken by cutting the column body 31A along a plane perpendicular to the longitudinal direction is rectangular. The pillar body 31A includes the flange 11, flange 12, and web 13 of the first pillar 10, and the flange 21, flange 2 of the second pillar 20.
2 and web 23 are coated. In the first modification, the pillar body 31A covers the entire first pillar 10 and the entire second pillar 20.

The main reinforcement 32A and the tie reinforcement 33A are embedded in the column main body 31A. The main reinforcement 32A is, for example, a deformed steel bar. The main reinforcement 32A extends along the Z direction. The plurality of main reinforcements 32A are the first pillars 10
and are arranged so as to surround the second pillar 20. The longitudinal direction of the main reinforcement 32A is parallel to the Z direction. The tie reinforcement 33A is, for example, a deformed steel bar. The tie reinforcements 33A are arranged so as to surround the plurality of main reinforcements 32A.

As explained above, in the frame type structure 100A of the first modification, the column main body 31A is
A pair of flanges (flange 11 and flange 12) and web 13 of the first column 10 and a pair of flanges (flange 21 and flange 22) and web 23 of the second column 20 are covered.

Thereby, the first pillar 10 and the second pillar 20 are more firmly restrained compared to the embodiment described above. The third pillar 30A further suppresses deformation of the first pillar 10 and the second pillar 20 around an axis parallel to the direction in which the first pillar 10 and the second pillar 20 are lined up (around the X axis). Therefore, the axial strength of the entire frame is improved. Further, the third pillar 30A bears the bending moment. Therefore, the bending strength and bending rigidity of the entire frame are improved. The frame type structure 100A can improve the axial strength, bending strength, and bending rigidity of the entire frame including two pillars that are connected H-beams.

(Second modification)
FIG. 6 is a front view of the frame type structure of the second modification. Note that the same components as those described in the embodiments described above are given the same reference numerals and redundant explanations will be omitted.

As shown in FIG. 6, the frame type structure 100B of the second modification includes a third pillar 30B. Third
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 length 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.
Less than the length of 0. That is, the third pillar 30B is shorter than the first pillar 10 and the second pillar 20 in the Z direction. 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 arranged between two beams 40 arranged in the Z direction. 3rd pillar 30
The internal structure of B is the same as the third pillar 30A of the first modification.

As explained above, in the frame type structure 100B of the second modification, in the longitudinal direction (Z direction) of the first pillar 10, the length of the third pillar 30B is the same as that of the first pillar 10 and the second pillar 20. less than or equal to the length.

Thereby, the frame type structure 100B can reduce the amount of concrete used compared to the frame type structure 100A of the first modification. Also, the third pillar 3 among the first pillar 10 and the second pillar 20
The length of the portion protruding from the upper end of 0B is shorter than the total length of the first pillar 10 and the second pillar 20. Therefore, the axial strength, bending strength, and bending rigidity of the portion of the first pillar 10 and second pillar 20 that protrudes from the upper end of the third pillar 30B are larger than in the case where the third pillar 30B is not present. .

(Third modification)
FIG. 7 is a front view of the frame type structure of the third modification. FIG. 8 is a sectional view taken along line DD in FIG. Note that the same components as those described in the embodiments described above are given the same reference numerals and redundant explanations will be omitted.

As shown in FIG. 7, the frame type structure 100C of the third modification includes a third pillar 30C. Third
The pillar 30 extends along the Z direction. The longitudinal direction of the third pillar 30C is parallel to the Z direction. X
The moment of inertia of the third column 30C with respect to the axis is the second column 10 and the second column 2 with respect to the X axis.
It is larger than the second moment of area of 0. It is desirable that the length L3C of the third pillar 30C in the Y direction is equal to or less than the length L1 and the length L2. In the third modification, the length L3C is
Equal to length L1 and length L2.

The third column 30C is an H-shaped steel. The horizontal cross section of the third pillar 30C is H-shaped. 3rd pillar 3
0C includes a flange 35, a flange 36, and a web 37. The thickness direction of the flange 35 is parallel to the Y direction. The thickness direction of the flange 36 is parallel to the Y direction. Flange 36 is parallel to flange 35. The thickness direction of the flange 35 and the flange 36 is
The flange 11 (flange 12) of the first column 10 and the flange 21 (flange 2) of the second column 20
It is perpendicular to the thickness direction of 2). The thickness direction of the web 37 is parallel to the X direction. Web 37 is perpendicular to flanges 35 and 36.

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

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. Flange 35
The +X direction end of the flange 21 is joined to the +Y direction end of the flange 21 . -X of flange 36
The end in the -Y direction is joined to the end of the flange 12 in the -Y direction. The end of the flange 36 in the +X direction is joined to the end of the flange 21 in the -Y direction.

Note that the third pillar 30C may be shorter than the first pillar 10 and the second pillar 20 in the Z direction. The upper end of the third pillar 30C may be arranged between two beams 40 aligned in the Z direction.

As explained above, in the frame type structure 100C of the third modification, the third column 30C is an H-beam steel. The thickness direction of the flange 35 (flange 36) of the third column 30C is orthogonal to the thickness direction of the flange 11 (flange 12) of the first column 10.

Thereby, the third pillar 30C suppresses deformation of the first pillar 10 and the second pillar 20 around an axis (around the X axis) parallel to the direction in which the first pillar 10 and the second pillar 20 are lined up. Therefore, the axial strength (buckling strength) of the entire frame is improved. Further, the third pillar 30C bears the bending moment. Therefore, the bending strength and bending rigidity of the entire frame are improved. The frame type structure 100C can improve the axial strength, bending strength, and bending rigidity of the entire frame including two pillars that are connected H-beams.

In the frame type structure 100C, the length L3C of the third column 30C in the depth direction (Y direction) parallel to the thickness direction of the web 13 of the first column 10 is the length L3C of the third column 30C in the depth direction parallel to the thickness direction of the web 13 of the first column 10. 12) Length L1 and flange 21 (
The length of the flange 22) is equal to or less than L2.

Thereby, in a building to which the frame structure 100C is applied, it is possible to suppress the third pillar 30C from protruding from the wall surface. The frame type structure 100C allows the interior space to be used more freely.

10 First pillars 11, 12 Flange 13 Web 15 Rib 19 Studs 21, 22 Flange 23 Web 25 Rib 29 Studs 30, 30A, 30B, 30C Third pillars 31, 31A Pillar bodies 32, 32A Main bars 33, 33A Stir bars 35, 36 Flange 37 Web 40 Beams 41, 42 Flange 43 Web 50 Connecting members 51, 52 Flange 53 Web 100, 100A, 100B, 100C Frame structure

Claims (5)

The first column is H-shaped steel,
a second column that is an H-shaped steel and is arranged next to the first column;
a third pillar connecting the first pillar and the second pillar and extending in the same direction as the longitudinal direction of the first pillar;
Equipped with
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 lined up,
The third pillar includes a pillar main body made of concrete, a main reinforcement embedded in the pillar main body, and a tie reinforcement embedded in the pillar main body,
The column main 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 any H-shaped steel other than the first column and the second column, and has a longitudinal length. The outer diameter of the cross section cut perpendicular to the direction is rectangular,
The plurality of main reinforcements are arranged surrounding the first pillar and the second pillar,
A frame type structure in which the straps are arranged surrounding the plurality of main reinforcements. The moment of inertia of the third column with respect to an axis parallel to the direction in which the first column and the second column are arranged is larger than the moment of inertia of the first column and the second column with respect to the axis. 1. The frame structure according to 1. The frame type structure according to claim 1 or 2, wherein the plurality of main reinforcements surround the first pillar and the second pillar and are arranged on the first pillar and the second pillar. In the pillar body, the length in the direction in which the first pillar and the second pillar are arranged is longer than the length in the direction perpendicular to the direction in which the first pillar and the second pillar are arranged. The frame structure according to any one of the above. The frame type structure according to any one of claims 1 to 4, wherein the length of the third pillar in the longitudinal direction of the first pillar is equal to or less than the length of the first pillar and the second pillar.

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