JPH10183776A - Connection part of concrete filled type steel pipe column and brace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection part of a concrete filled type steel pipe column (CFT column) and a brace which transmit stress of the brace to a rear surface of the CFT column widely and efficiently through a stress transmission member having a clear structure. SOLUTION: In a connection part of a CFT column 3 and a brace 4, an outwardly winding type stress transmission member 5 such as a band plate is wound around at least outer periphery 3a of a rear surface of the CFT column 3. An end part of the outwardly winding type stress transmission member 5 and an end part of the brace 4 are joined by using a connection member 6 so that the stress of the brace 4 can be transmitted to the CFT column 3 through the outwardly winding type stress transmission member 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of incorporating a brace into a concrete-filled steel pipe column (hereinafter, may be abbreviated as a CFT column) which is used for constructing a high-rise building, a large-scale building, and the like. More particularly, the present invention relates to a connection between a CFT column and a brace that is implemented so that stress of the brace can be transmitted to the CFT column.

[0002]

2. Description of the Related Art A so-called concrete-filled steel pipe column exerts a high compressive force even on a thin steel pipe by maximizing the confining effect of concrete filled in the steel pipe, and has excellent earthquake resistance. In order to secure the rigidity required for the frame of a high-rise building, to apply it to a mega frame, etc., and to reduce the amount of steel frames for the purpose of reducing costs while taking advantage of the excellent characteristics of these CFT columns , Without a combination with braces.

Conventionally, an outer diaphragm type ring plate has been generally used for joining a CFT column and a beam due to the filling property of concrete and the ease of processing a steel frame. FIG. 9 shows a form in which a member having a high axial force such as a brace is attached to the CFT column without changing the basics. A CFT column a and a beam g, each of which is filled with concrete c in a steel tube column b, are joined via a lower ring plate e and an upper ring plate e ′ attached to the outer periphery of the CFT column a, and the upper surface thereof Is formed with a floor slab f.
Then, the CFT column a and the brace d are joined by attaching a ring plate e ″ to the outer periphery of the CFT column a further above the upper ring plate e ′ and the floor slab f, and connecting the upper ring plate e ′ with the upper ring plate e ′. The end of the brace d is joined to the end of the uppermost ring plate e ″.

In recent years, a connection portion between a CFT column and a brace as illustrated in FIGS. 11 and 12A and 12B has been developed (see Japanese Patent Publication No. 6-10380). The joint shown in FIG. 11 is configured such that an end of a brace d is coupled to a mounting member n protruding from the outer periphery of the CFT column a on the brace joining side with a bolt h and a nut i, and a tensile force transmitting member k Is continuous with the mounting member n via the wall surface of the steel pipe column b, and C
The FT column a is joined to the inner wall surface of the steel tube column b by welding so as to cross the inside of the FT column a in the radial direction. The joint shown in FIG. 12 is basically the same as the joint shown in FIG. 11, except that the tensile force transmitting member k shown in FIG. 11 is provided in the CFT column a. Is different in that the tensile force transmitting member m is provided so as to penetrate the wall surface of the steel pipe column b on the brace joining side. That is, the steel pipe column b has a vertically long opening p.
The tensile force transmitting member m joined to the end of the brace d by the bolt h and the nut i is inserted into the CFT column a through the through hole p, and the end of the tensile force transmitting member m is inserted into the steel tube column b. It is fixed to the wall by welding.

[0005]

The connection between the conventional CFT column a and the brace d shown in FIG. 9 is constructed because the uppermost ring plate e "is located on the floor slab f. Therefore, it is conceivable to attach the brace d directly to the steel tube column b. However, in the case of a CFT column using a thin steel tube, the force from the brace is applied to many portions of the steel tube. Since it is necessary to transmit the signal as widely as possible, it is impossible to perform direct joining, especially when the brace force acts as a tensile force as shown in FIG. ), And transmit the force to the back and back of the CFT column a (see the right arrow in the figure),
It is important to balance forces.

In this regard, the connection shown in FIGS. 11 and 12 has a mechanism for transmitting the tensile force of the brace d to the rear side of the CFT column a. However, this connection portion transmits the tensile force of the brace to the inside of the wall surface of the steel pipe column b via the tensile force transmitting member k (or m), and transmits the concrete c to the direction indicated by the arrow in FIG. It is a structure for transmitting the bearing pressure and not transmitting the stress (tensile force) of the brace to the outside (rear back surface) of the wall surface of the steel pipe column b. In addition, the work of welding the end of the tensile force transmitting member k (or m) to the inner wall surface of the steel pipe column b is very troublesome and troublesome. In particular, so that the tensile force transmitting members k and m are located on the extension of the brace d,
It must be welded to the inner wall surface of the steel pipe column b with high accuracy, and an accurate operation is required. FIG.
In the case of using the second tensile force transmitting member m, there is also a problem that a work for forming a large opening p in the wall surface of the steel pipe b is required, which is troublesome.

Therefore, the main object of the present invention is to provide a CF
When joining the brace to the CFT column by exhibiting the characteristics of the T column, the CFT column and the brace efficiently transmit the stress of the brace widely to the rear and back (outside) of the CFT column via a stress transmitting member having a clear structure. And to provide a connection. Next, even if the method is carried out with an opening provided in the steel pipe wall of the CFT column, the stress of the brace can be efficiently and simply reduced by the CFT.
Provide a connection that can be transmitted to the pillar.

[0008]

As a means for solving the above-mentioned problems of the prior art, a CFT according to the first aspect of the present invention is used.
The connection between the column and the brace is CFT
An outer winding type stress transmitting member 5 such as a band plate is wound around the outer peripheral surface of the column 3 and the outer winding type stress transmitting member 5 and the end of the brace 4 are joined. It is characterized in that it can be transmitted to the CFT column 3 via the transmission member 5.

The joint between the CFT column and the brace according to the second aspect of the present invention is: a) the CFT column 3 and the brace 4 are connected via the outer winding type stress transmitting member 5 and the connecting member 6; B) The outer winding type stress transmitting member 5 is formed of a band plate capable of winding the outer periphery of the CFT column 3, and the band plate 5 is wound around at least the outer periphery 3 a of the rear surface of the CFT column 3. C) the connecting member 6 has a flange-like overall shape, and the front portion 6c is formed in a shape such as a curved shape along the outer periphery 3b of the CFT column 3 on the brace side; d) the brace 4 Is that the upper and lower ends of the flanges 4a, 4a are cut out so as to be able to join the connecting member 6, respectively. E) The front part 6c of the connecting member 6 is attached to the outer periphery 3b on the brace side of the CFT column 3 Welded and joined on both left and right sides 6a, 6
a is welded to the brace side end 5 a of the band plate 5, and the rear portion 6 b is cut out of the notch flange 4 of the brace 4.
a, 4a, and the upper or lower surface thereof is welded to the lower or upper surface of the web 4b of the brace 4, and the tip of the web 4b of the brace 4 is attached to the outer periphery 3b of the CFT column 3 on the brace side. F) that the stress of the brace 4 can be transmitted to the CFT column 3 via the connecting member 6 and the band plate 5;
Are characterized.

In the joint between the CFT column and the brace according to the third aspect of the present invention, in the joint, washers 8 and 8 are respectively installed on the outer periphery 3a on the back rear surface of the steel tube column 1 and the outer periphery 3b on the brace side. Then, the washer 8 on the brace side and the end of the brace 4 are joined, and the through-type stress transmitting member 7 such as a long bolt is connected to the washer 8.
And the through-hole type stress transmitting member 7
Is fastened by a nut 10 on the washer 8 to fill the steel pipe column 1 with concrete 2 so that the stress of the brace 4 can be transmitted to the CFT column 3 via the penetrating type stress transmission member 7. It is characterized by having done.

According to a fourth aspect of the present invention, in the joint between the CFT column and the brace, an opening 20 is provided on the brace-side wall surface of the steel pipe column 1 in the joint, and a lid for closing the opening 20 is provided. An internal stress transmitting member 11 is installed on the inner surface of the body 12, concrete 2 is filled in the steel pipe column 1, the internal stress transmitting member 11 is fixed inside the CFT column 3, and the brace 4 is fixed. The end is joined to the outer surface of the lid 12, the brace 4 and the internal stress transmitting member 11 are provided continuously with the lid 12 interposed therebetween, and the stress of the brace 4 is reduced by the internal stress transmitting member 11. Through the CFT column 3.

According to a fifth aspect of the present invention, in the joint between the CFT column and the brace, an opening 20 is provided in the brace-side wall surface of the steel pipe column 1 in the joint, and a lid for closing the opening 20 is provided. An internal stress transmitting member 11 is installed on the inner side surface of the body 12, and the steel pipe column 1 is filled with concrete 2 to fix the internal stress transmitting member 11 inside the CFT column 3.

The joint between the CFT column and the brace according to the invention of claim 6 is provided with the internal type stress transmitting member 11 fixed inside the CFT column 3 according to claim 4 or 5 and the brace 4. Fixing members 13, 14, 15 for reinforcing stress transmission
Is provided.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The connection between concrete filled steel pipe columns (CFT columns) and braces according to the first to sixth aspects of the present invention is implemented for building high-rise buildings or large-scale buildings. When a brace 4 for reinforcing the strength is incorporated into a frame (see FIG. 7) composed of the CFT columns 3 and the beams 22, the brace 4
The stress is transmitted to the CFT column 3 at the joint (joint) between the CFT column 3 and the brace 4. The steel pipe column 1 is preferably a thin circular pipe in the illustrated example, but is not limited thereto, and may be a square steel pipe (not shown). In addition to the implementation in a bonded state, it is also possible to provide an isolation layer (not shown) between the two, and to implement in an unbonded state. The brace 4 is made of H-shaped steel and its CFT
Upper and lower flanges 4a, 4 at the ends joined to the columns 3
a is cut out and formed (however, the end of the brace 4 used together with the internal stress transmitting member 11 described later is not cut out).

The stress transmitting members for transmitting the stress of the brace 4 are roughly classified into the following three types: an externally wound type, a through type and an internal type. The invention according to claims 1 and 2 relates to an externally wound type stress transmission member. The CFT column 3 and the brace 4 are joined via the outer winding type stress transmitting member 5 and the connecting member 6. FIGS. 1 and 2 show the externally wound type stress transmitting member 5.
The band plate 5 shown in FIG. The band plate 5 is formed in a band shape from a thin steel plate having a short width and a length substantially equal to the length of the outer periphery of the CFT column 3 (steel tube column 1) so that the entire length can be wound around the outer periphery.
The band plate 5 is usually used in pairs.
The outer periphery 3a of the rear surface of the CFT column 3 (about a half of the entire outer peripheral surface of the CFT column 3) is folded in a U-shape when viewed from the plane, wound around, and fixed to the CFT column 3 by welding. (FIG. 1B, FIG. 2).

As shown in FIG. 2, the connecting member 6 is formed in a flange shape by a steel plate, and its front portion 6c is fitted along the outer periphery 3b of the CFT column 3 on the brace side. It is formed in a curved shape (however, when used for a square steel pipe, the front portion 6c is formed in a straight line). The rear portion 6b of the connection member 6 is formed in a straight line so as to be able to be joined to the end of the flange 4a of the brace 4. Also,
The left and right side portions 6a, 6a are also formed linearly in the tangential direction of the band plate 5, and the width between the side portions 6a, 6a is formed to a length substantially corresponding to the diameter of the CFT column 3. (FIG. 1B). The connecting member 6 is used as a pair of upper and lower members, and each rear portion 6b is joined to one end of the upper and lower cutout flanges 4a, 4a of one brace 4 by welding. The upper and lower surfaces of the upper and lower connecting members 6, 6 are welded to upper and lower ends of the web 4b so as to sandwich the web 4b from above and below, and are integrated with the brace 4 in advance (FIG. 2). . Thus, the curved front portion 6c of the connecting member 6 is joined to the outer periphery 3b on the brace side of the CFT column 3 by welding, and both left and right side portions 6a, 6a are wound around the CFT column 3 of the band plate 5. It is welded to the inner ends of the open ends 5a, 5a which are not provided. The tip of the web 4b of the brace 4 is C
It is welded to the outer periphery 3b of the FT column 3 on the brace side (FIG. 1B). However, the connecting member 6 is not joined to the end of the brace 4 in advance, but is joined to the outer periphery 3b on the brace side of the CFT column 3 and the inner surface of the end 5a of the band plate 5 (not shown). It is also possible to carry out. Accordingly, since the end of the brace 4 is integrally connected to the CFT column 3 via the band plate 5 and the connecting member 6, the stress (particularly, tensile force) of the brace 4 is reduced by the connecting member 6. , Is widely transmitted to the rear surface (outside) of the CFT column 3 through the band plate 5, and the force can be balanced.

The brace 4 is arranged horizontally and the CFT columns 3
However, as shown in FIGS. 3A and 3B, an embodiment in which the brace 4 is inclined and joined to the CFT column 3 is also generally adopted, and the brace stress from the inclined direction is reduced in the same manner as described above. C via plate 5 (connection member 6)
The power is transmitted to the rear surface 3a of the FT column 3. 3A, a horizontal connecting member 6 is welded to the upper and lower flanges 4a and 4a ends of the inclined brace 4, and the connecting member 6 is horizontally wound around the CFT column 3 as described above. It is welded to the plates 5,5. In the case of FIG. 3B, the band plate 5 is wound around the CFT column 3 while being inclined at the same angle as the inclination angle of the brace 4, and the connecting member 6 is also welded to the end of the inclined brace 4 in the inclined state. The connecting member 6 is welded and joined to the band plate 5 in an inclined state, so that the brace stress is smoothly transmitted to the CFT column 3.

The connection between the CFT column and the brace may be more rationally implemented in the manner shown in FIGS. The connecting member 6 'shown in FIG.
The width of b 'is formed to be substantially equal to the width of the flange 4a of the brace 4, and the left and right ends 6a' and 6a 'converge according to a tangent which narrows the band plate 5 to the width of the rear end 6b'. It is formed as follows. Therefore, CFT pillar 3
The ends 5a, 5a of the band plate 5 wound around the connecting member 6 are bent so as to converge and are joined along the left and right side ends 6a ', 6a' of the connecting member 6 '. Can be further firmly wound around the CFT column 3, and the transmission of the brace stress to the CFT column can be performed more smoothly.

In the connection shown in FIG. 5, one (single) band plate 5 "is used. That is, the band plate 5 shown in FIG. The band plate 5 "shown in FIG.
Is formed by a single plate having a width slightly larger than that of the brace 4, and upper and lower flanges 4a, 4a of the brace 4 are commonly welded to the end 5a "on the brace side of the band plate 5". I have. This band plate 5 "
If two band plates 5 are used as described above,
It is possible to save time and effort in winding the CRT column 3 around the outer periphery of the CFT column 3 by adjusting the positions of the flanges 4 to the upper and lower flanges 4a and 4a of the brace 4, thereby enabling efficient implementation.

The invention according to claim 3 relates to a through-type stress transmitting member. As the penetration type stress transmission member, FIG.
A long bolt 7 as shown in FIG. The long bolt 7 has an effective length longer than the diameter of the steel pipe column 1 as it completely penetrates the steel pipe column 1 in the diameter direction, and is fastened in a bonded state or an unbonded state.
In the figure, reference numeral 16 indicates a bolt hole formed in the steel pipe column 1. Reference numeral 8 denotes a washer whose inner surface is formed in a curved shape along the outer peripheral surface of the steel pipe column 1, reference numeral 17 denotes a mortar filling port provided in the washer 8, and reference numeral 18 denotes a bolt hole formed in the washer 8. I have. Reference numeral 9 denotes an end plate welded to the end of the brace 4, and reference numeral 19 denotes a bolt hole formed in the end plate 9.

Accordingly, the outer periphery 3a on the rear surface of the steel tube column 1 and the outer periphery 3b on the brace side are sandwiched by the steel tube column 1.
Then, the washers 8, 8 are respectively applied to the steel pipes 1 and, if necessary, positioned and fixed to the steel pipe column 1 by welding. The outer end face of the end plate 9 joined to the end of the brace 4 is joined to the end face of the washer 8 on the brace side. Then, a total of eight long bolts 7 (however, the number of bolts is not limited to eight and a plurality of long bolts may be used) are inserted into the bolt holes 16-18-19 each having a common position. Nut 1 from both ends
It is tightened and fixed at 0 and 10. Concrete 2 is filled in the steel pipe column 1 and a mortar filling port 1 of a washer 8 is provided.
The mortar is filled by using No. 7. That is, according to this embodiment, the plurality of long bolts 7 are completely provided in the inside of the CFT column 3, and the long bolts 7 are provided.
Are firmly fixed on the outer periphery 3a on the rear rear surface of the CFT column 3 and the outer periphery 3b on the brace side via the washers 8 and 8, so that the stress of the brace 4 is reduced. Through the shank bolts 7..., It can be sufficiently transmitted to the rear surface of the CFT column 3 on the surface of the washer 8 in a wide range.

The invention according to claims 4 and 5 relates to an intrinsic stress transmitting member. As shown in FIGS. 7 and 8, an opening 20 is provided in the wall surface on the brace side of the steel pipe column 1,
The internal stress transmitting member 11 is installed on the inner surface of the lid 12 closing the opening 20 by welding. The internal stress transmission member 11 is made of an H-shaped steel having a size that can be inserted in a horizontal arrangement inside the steel pipe column 1. By filling the steel pipe column 1 with the concrete 2, the internal stress transmission member 11 is completely embedded and fixed inside the CFT column 3. The ends of the upper and lower flanges 4a, 4a of the brace 4 and the end of the web 4b are welded to the outer surface of the lid 12, and thus each of the flange 4a, the web 4b of the brace 4 and the internal stress transmitting member. 11 flanges 4
a ′ and the web 4b ′ are continuously provided with the lid 12 interposed therebetween. Therefore, the stress of the brace 4 can be easily and rationally transmitted to the CFT column 3 using the internal stress transmission member 11 that is joined to the lid 12 that closes the opening 20 in advance.

The internal stress transmitting member 11 fixed inside the CFT column 3 is provided with a fixing member for reinforcing the stress transmission of the brace 4 as described in claim 6. More preferred. As the fixing member, a stud bolt indicated by reference numeral 13 in FIG. 7 and a bearing plate indicated by reference numeral 14 are suitable. In addition, as shown by reference numeral 15 in FIG. Those having a projection are also suitable. Although illustration is omitted,
By fixing the flange 4a 'of the internal stress transmission member 11 with a striped steel plate, the fixing force is further increased.

[0024]

According to the present invention, the CF according to any one of claims 1 to 6 is provided.
According to the connection between the T-column and the brace, the CFT column demonstrates its excellent seismic resistance and other characteristics, and then uses an externally wound, through-type or internal-type stress transmitting member with a clear and simple structure. The stress of the brace can be reasonably and surely widely transmitted to the rear surface (outside) of the CFT column via the CFT column, and the rigidity of the CFT frame is ensured. In particular, if an externally wound stress transmitting member such as a band plate is used, the brace stress is most efficiently transmitted to the rear surface of the CFT column without damaging the CFT column.
In addition, by combining the brace with the CFT column using the stress transmitting member such as the outer winding type, it also contributes to lowering the construction cost of the entire CFT frame.

[Brief description of the drawings]

FIGS. 1A and 1B are a front view and a plan view showing a joining state of a CFT column and a brace by an externally wound stress transmitting member.

FIG. 2 Brace / connecting member and externally wound type stress transmitting member
It is the perspective view which showed the junction point with a CFT pillar.

FIGS. 3A and 3B are front views showing different embodiments of FIG. 1A.

FIG. 4 is a plan view showing a different embodiment of FIG. 1B.

FIG. 5 is a front view of a different band plate.

FIGS. 6A and 6B are a front view and a plan view showing a joining state by a through-type stress transmitting member.

FIG. 7 is a cross-sectional view showing an internal stress transmission member.

FIG. 8 is a sectional view showing a different intrinsic stress transmitting member.

FIG. 9 is a front view of a conventional CFT column and a brace, which are joined together.

FIG. 10 is a partially cutaway front view showing a connection between a CFT column and a brace.

FIG. 11 is a cross-sectional view showing a conventional joint between a CFT column and a brace.

12A is a longitudinal sectional view showing a different conventional example, and FIG.
FIG. 3 is a sectional view taken along the line BB in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel pipe 2 Concrete 3 Concrete filled steel pipe column (CFT) 4 Brace 5 Outer winding type stress transmitting member (band plate) 6 Connecting member 7 Penetrating type stress transmitting member (long bolt) 10 Nut 11 Internal stress transmitting member 12 Lid Body 13, 14, 15 Fixing member

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁶ Identification code FI E04B 2/56 652 E04B 2/56 652J (72) Inventor Hirofumi Kaneko 1-5-1, Otsuka, Inzai-shi, Chiba Pref. Takenaka Corporation (72) Inventor Takahiro Moi 1-5-1, Otsuka, Inzai-shi, Chiba Prefecture, Japan Takenaka Corporation Technical Research Institute

Claims (6)

[Claims] An externally wound type stress transmitting member such as a band plate is wound around an outer peripheral surface of a concrete-filled steel pipe column and a brace at a connection portion between the concrete-filled steel pipe column and a brace formed by filling concrete into a steel pipe column. The outer winding type stress transmitting member and the end of the brace are joined, and the structure is configured such that the stress of the brace can be transmitted to the concrete filled steel pipe column via the outer winding type stress transmitting member. The connection between the concrete-filled steel pipe column and the brace. 2. A connection between a concrete-filled steel tubular column and a brace, wherein concrete is filled in a steel tubular column, and a) the concrete-filled steel tubular column and the brace are formed by an externally wound type stress transmitting member and a connecting member. B) the externally wound type stress transmitting member is constituted by a band plate capable of externally winding around the outer periphery of the concrete-filled steel tubular column;
The band plate is wound around at least the outer periphery of the rear surface of the concrete-filled steel pipe column. C) The connecting member has a flange-like overall shape, and its front portion is on the brace side of the concrete-filled steel pipe column. D) the brace is formed by cutting out the upper and lower flange ends of the brace so that the connection member can be joined to the brace, and e) the brace is formed. The front part of the connecting member is welded to the outer periphery of the brace side of the concrete filled steel pipe column, the left and right sides are welded to the brace side end of the band plate, and the rear part is welded to the notch flange end of the brace The upper or lower surface is welded to the lower or upper surface of the web of the brace, and the tip of the web of the brace is connected to the brace of the concrete-filled steel pipe column. F) a stress of the brace is configured to be transmitted to the concrete-filled steel pipe column via the connection member and the band plate, and Connection between steel pipe columns and braces. 3. A connection portion between a concrete-filled steel pipe column and a brace formed by filling concrete in a steel pipe column, and a washer is installed on an outer periphery of a rear surface of the steel pipe column and an outer periphery of a brace side, respectively. The washer and the end of the brace are joined together, and a through-type stress transmitting member such as a long bolt is provided through the washer and the steel pipe column, and the end of the through-type stress transmitting member is a nut on the washer. The concrete-filled steel pipe is characterized in that concrete is filled in the steel pipe column, and the brace stress is configured to be transmitted to the concrete-filled steel pipe column through the penetrating stress transmitting member. Connection between pillar and brace. 4. A connecting portion between a concrete-filled steel pipe column and a brace formed by filling concrete in a steel pipe column, and an opening is provided on a wall surface on a brace side of the steel tube column, and a lid for closing the opening is provided. An internal stress transmission member is installed on the inner surface of the body, the concrete is filled in the steel pipe column, the internal stress transmission member is fixed inside the concrete filled steel pipe column, and the end of the brace is The brace and the intrinsic stress transmitting member are joined to the outer surface of the lid, and the brace and the internal stress transmitting member are provided continuously with the lid interposed therebetween, and the stress of the brace is supplied to the concrete-filled steel pipe via the internal stress transmitting member. A connection between a concrete-filled steel pipe column and a brace, characterized in that it can be transmitted to the column. 5. A connection portion between a steel tube column and a concrete-filled steel tube column in which concrete is filled in a steel tube column, and a brace-side wall surface of the steel tube column having an opening, and a lid for closing the opening. Concrete, wherein an intrinsic stress transmitting member is installed on the inner surface of the body, concrete is filled in the steel pipe column, and the intrinsic stress transmitting member is anchored inside the concrete filled steel tubular column. Connection between filled steel pipe column and brace. 6. An internal stress transmitting member fixed inside the concrete-filled steel tubular column according to claim 4 or 5, wherein a fixing member for reinforcing stress transmission of the brace is provided. , Concrete-filled steel pipe columns and braces.