JP7529596B2 - Joint structure between steel pipe concrete column and steel beam and its construction method - Google Patents

Description

The present invention relates to a joint structure between a steel pipe concrete column and a steel beam and a method for constructing the same.

In recent years, construction methods that use steel and concrete for the framework of architectural structures have become widespread. The joint structure between the steel-reinforced concrete columns and the steel beams is a major factor that greatly determines the strength of architectural structures, and various innovations have been made in this joint structure (for example, Patent Document 1).
The beam-column joint structure of Patent Document 1 is a joint structure between an SRC column and a steel beam. The SRC column has a structure in which reinforcing bars are arranged around an H-shaped steel and concrete is poured around the H-shaped steel and the reinforcing bars, and compared to a joint structure between an RC column (reinforced concrete column) and a steel beam, the SRC column has improved axial strength and earthquake resistance, and can smoothly transmit stress between the SRC column and the steel beam.

Patent No. 6447777

However, the joint structure between the SRC column and the steel beam described in Patent Document 1 requires a lot of manpower for reinforcing bar arrangement and formwork work, and the work time is long, which poses problems in terms of shortening the construction period and improving workability.
Therefore, the present invention has been made in consideration of the above circumstances, and aims to provide a method for constructing a joint structure between a steel pipe concrete column and a steel beam that can shorten the construction period and improve workability. Also, a steel pipe concrete column with improved axial strength and earthquake resistance due to the increase in compressive strength of the concrete due to the restraining effect of the outer steel pipe is provided, and a joint structure that can smoothly transmit stress between the steel pipe concrete column and the steel beam is provided.

In order to achieve the above object , the joint structure between a steel concrete-filled pipe column and a steel beam according to the present invention is a structure in which a steel concrete-filled pipe column and a steel beam are joined at a column-beam joint, the steel concrete-filled pipe column comprises an inner steel pipe arranged extending in the vertical direction, an outer steel pipe arranged coaxially outside the inner steel pipe, and a first concrete filled in an annular space surrounded by the outside of the inner steel pipe and the inside of the outer steel pipe. The column-beam joint is an upper part of the inner steel pipe and comprises a joining steel pipe provided with a diaphragm on its outer periphery, a plurality of joints joining the steel beam via the diaphragm, a plurality of outer jacket members connected to the plurality of joints and surrounding the outer periphery of the joining steel pipe, and a first concrete filled in an outer jacket space surrounded by the outside of the joining steel pipe and the inside of the plurality of outer jacket members.

Furthermore, the method for constructing a joint structure between a steel concrete-filled column and a steel beam according to the present invention is a method for constructing a structure in which a steel concrete-filled column and a steel beam are joined at a column-beam joint, in which the steel concrete-filled column comprises an inner steel pipe and an outer steel pipe having an inner diameter larger than that of the inner steel pipe and composed of a plurality of segments divided into two or more in the circumferential direction. The column-beam joint is the upper part of the inner steel pipe and comprises a joining steel pipe with a diaphragm on its outer periphery, a plurality of joints that join the steel beam via the diaphragm, and a plurality of outer jacket members that are connected to the plurality of joints and can surround the outer periphery of the joining steel pipe. The method includes the steps of erecting the inner steel pipe on the foundation concrete, arranging the outer steel pipe by placing multiple division bodies on the outside of the inner steel pipe and joining them together, connecting the multiple outer sheath members to the multiple joints so that the outer circumferential space surrounded by the outside of the joining steel pipe and the inside of the multiple outer sheath members is connected to the annular space surrounded by the outside of the inner steel pipe and the inside of the outer steel pipe, and filling the annular space and the outer circumferential space that are connected to each other with the first concrete.

The joint structure between a steel pipe concrete column and a steel beam according to the present invention can improve axial strength and earthquake resistance.
In addition, the method for constructing a joint structure between a steel pipe concrete column and a steel beam can improve axial strength and earthquake resistance while shortening construction time and improving workability.

1 is a diagram showing a joint structure between a steel pipe concrete column and a beam according to a first embodiment of the present invention. FIG. FIG. 2 is a diagram showing an outer steel pipe that constitutes a steel pipe concrete column in the first embodiment. FIG. 2 is a diagram showing a joining steel pipe and a joint that constitute the column-beam joint of the first embodiment. FIG. 2 is a diagram showing a column-beam joint of the first embodiment. 1 is a diagram showing a method of constructing a joint structure between a steel pipe concrete column and a beam in the first embodiment. FIG. 11 is a diagram showing a joint structure between a steel pipe concrete column and a beam in a second embodiment according to the present invention. FIG. 11 is a diagram showing a joint structure between a steel pipe concrete column and a beam according to a third embodiment of the present invention.

Next, an embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are given the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the relationship between thickness and planar dimensions, the thickness ratio of each layer, etc., differ from the actual ones. Therefore, the specific thickness and dimensions should be determined with reference to the following explanation. In addition, it goes without saying that the drawings include parts with different dimensional relationships and ratios.

The embodiments shown below are merely examples of devices and methods for embodying the technical ideas of the present invention, and the technical ideas of the present invention do not specify the materials, shapes, structures, arrangements, etc. of the components as described below. The technical ideas of the present invention may be modified in various ways within the technical scope defined by the claims.

[Column-beam joint structure of the first embodiment]
FIG. 1 shows a column-beam joint structure of the first embodiment of the present invention, in which a steel pipe concrete column 2 (hereinafter referred to as SC column 2) rises from a foundation concrete 1 on the first floor, and a steel beam 4 extends horizontally and is joined via a column-beam joint 3 provided at the top of the SC column 2.

The SC column 2 comprises an inner steel pipe 5 made of a square steel pipe rising vertically from the foundation concrete 1, an outer steel pipe 6 made of a circular steel pipe arranged coaxially on the outside of the inner steel pipe 5, a first concrete 7 filled in the space surrounded by the outside of the inner steel pipe 5 and the inside of the outer steel pipe 6, and a second concrete 8 filled in the internal space of the inner steel pipe 5.
The lower end opening of the inner steel pipe 5 is closed by an anchor plate AP, and an anchor bolt 9 rising from inside the foundation concrete 1 is fixed by penetrating the anchor plate AP. In addition, a floor plate concrete 10 forming the floor surface is laid on the foundation concrete 1. Note that this example is based on the premise that the anchor bolt is fixed by penetrating the anchor plate, but is not limited to this, and can also be applied to other column base structures such as embedded column bases.

As shown in FIG. 2, the outer steel pipe 6 is composed of two divided bodies 6a and 6b formed by dividing a circular steel pipe in half in the circumferential direction, and flanges 6a1, 6a2, 6b1, and 6b2 extending in the longitudinal direction are formed on both circumferential edges of each divided body 6a and 6b. The flanges 6a1, 6b1 and 6a2, 6b2 that abut against each other are welded or bolted to form the outer steel pipe 6.

As shown in Fig. 3, the column-beam joint 3 is the upper part of the inner steel pipe 5 of the SC column 2, and includes a joining steel pipe 11 with two rectangular frame-shaped diaphragms 12a, 12b welded to its outer periphery at a distance from each other in the vertical direction, and four joints 13 made of H-shaped steel with flanges 13a, 13b welded to the diaphragms 12a, 12b and webs 13c welded to the joining steel pipe 11, extending in four directions perpendicular to each other in the horizontal direction. Also, as shown in Fig. 4, outer shell members 14 made of arc-shaped metal plates are welded between the joints 13, 13 adjacent in the horizontal direction so as to surround the outer periphery of the joining steel pipe 11 between the diaphragms 12a, 12b. The four outer shell members 14 are arranged between the four joints 13 with approximately the same diameter as the outer steel pipe 6. As shown in FIG. 1, the internal space of the connecting steel pipe 11 is filled with the second concrete 8 and is connected to the internal space of the inner steel pipe 5, and the space surrounded by the outside of the connecting steel pipe 11 and the inside of the four outer jacket members 14 is filled with the first concrete 7 and is connected to the space surrounded by the outside of the inner steel pipe 5 and the inside of the outer steel pipe 6.

As shown in FIG. 1, a steel beam 4 made of H-shaped steel is connected to the joint 13 of the column-beam joint 3 by bolting.
Furthermore, a concrete floor plate 10 is laid on the steel beams 4 as the floor of the second floor, and the lower end of the inner steel pipe 5 is welded to the upper end of the joining steel pipe 11 of the column-beam joint 3. Then, this inner steel pipe 5 is used as a component of the SC column 2 of the second floor, forming a column having the same structure as the SC column 2 of the first floor.
Here, a predetermined gap is provided between the lower end of the outer steel pipe 6 constituting the SC column 2 on the first floor, indicated by reference symbol A in FIG. 1, and the floor plate concrete 10 on the first floor. A predetermined gap is also provided between the upper end of the outer steel pipe 6 constituting the SC column 2 on the second floor, indicated by reference symbol B in FIG. 1, and the mantle member 14 welded to the joint 13 of the column-beam joint 3. A predetermined gap is also provided between the lower end of the outer steel pipe 6 constituting the SC column 2 on the second floor, indicated by reference symbol C in FIG. 1, and the floor plate concrete 10 on the second floor. In this way, by providing a gap between the lower end of the outer steel pipe 6 and the floor plate concrete 10 on the first and second floors, and by providing a gap between the upper end of the outer steel pipe 6 and the mantle member 14 of the column-beam joint 3, bending moment and axial force are not applied to the outer steel pipe 6, so there is no need to make the plate thickness of the outer steel pipe excessive, which is economical.

Next, the effects of the first embodiment will be described.
In the SC column 2 of the first embodiment, the axial compressive strength is increased by filling the first concrete 7 between the inner steel pipe 5 and the outer steel pipe 6, resulting in a column structure with improved axial strength compared to conventional steel reinforced concrete columns (SRC columns).
In addition, the SC column 2 has an axial compressive strength further increased by filling the inside of the inner steel tube 5 with the second concrete 8, and the filling of the second concrete 8 restrains the out-of-plane deformation of the inner steel tube 5, resulting in a column structure with improved buckling strength.
Furthermore, by filling the inside of the inner steel pipe 5 with the second concrete 8 and filling the space between the inner steel pipe 5 and the outer steel pipe 6 with the first concrete 7, the SC column 2 can withstand the stresses of an earthquake and exhibit ductile behavior even when repeated loads are applied during an earthquake, thereby providing a column structure with excellent earthquake resistance.

On the other hand, the column-beam joint 3 that joins the SC column 2 and the steel beam 4 in the first embodiment has a column-beam joint structure with improved axial strength because the first concrete 7 is filled between the joining steel pipe 11 and the four outer jacket members 14 surrounding the outer periphery of the joining steel pipe 11. In addition, the column-beam joint 3 has a column-beam joint structure with improved buckling strength because the out-of-plane deformation of the joining steel pipe 11 is restrained by filling the inside of the joining steel pipe 11 with the second concrete 8.
Therefore, the column-beam joint 3 of the first embodiment can smoothly transmit stress between the SC column 2 and the steel beam 4.
Here, the outer shell space described in the present invention corresponds to the space surrounded by the outside of the joining steel pipe 11 and the inside of the four outer shell members 14. Also, the second joining concrete described in the present invention corresponds to the second concrete 8.

[Method for constructing a column-beam joint structure according to the first embodiment]
Next, a method for constructing a structure including the SC column 2, the column-beam joint 3, and the steel beam 4 of the first embodiment will be described with reference to Figures 5 (a) to (e).
First, as shown in Fig. 5(a), the anchor plate AP at the lower end of the inner steel pipe 5A on the first floor is fixed in a state in which it is penetrated by the anchor bolt 9 rising from the foundation concrete 1, and the inner steel pipe 5 is erected on the foundation concrete 1. The upper part of the inner steel pipe 5 is the joining steel pipe 11 of the column beam joint 3, and the joint steel pipe 11 is joined to the joint 13 in advance at the factory via diaphragms 12a, 12b. Then, after the steel beam 4 is connected to the joint 13 of the column beam joint 3 by bolt joint, the upper end of the joint steel pipe 11 and the lower end of the inner steel pipe 5 on the second floor are welded. In addition, the floor plate concrete 10 is laid on the foundation concrete 1.

Next, as shown in FIG. 5(b), concrete is poured through a concrete pouring hole (not shown) provided on the side of the inner steel pipe 5 on the first floor. Once the entire internal space of the inner steel pipe 5 on the first floor is filled with concrete, concrete is poured into the internal space of the connecting steel pipe 11, whose internal space is connected to the inner steel pipe 5 on the first floor. Also, once the entire internal space of the connecting steel pipe 11 is filled with concrete, concrete is poured into the internal space of the inner steel pipe 5 on the second floor, whose internal space is connected to the connecting steel pipe 11. As a result, the second concrete 8 is poured into all internal spaces of the inner steel pipe 5 on the first floor, the connecting steel pipe 11, and the inner steel pipe 5 on the second floor.

Next, as shown in FIG. 5(c), the outer steel pipe 6 is placed coaxially on the outside of the inner steel pipe 5 on the first floor. When placing the outer steel pipe 6, the two divided bodies 6a, 6b are placed on the outside of the inner steel pipe 5, and the abutting flanges 6a1, 6b1 and 6a2, 6b2 are welded or bolted. In addition, four outer jacket members 14 are welded between the horizontally adjacent joints 13, 13 of the column-beam joint 3. The four outer jacket members 14 welded to the joints 13 of the column-beam joint 3 are placed with approximately the same diameter as the outer steel pipe 6 on the first floor, and the space between the outer steel pipe 6 and the inner steel pipe 5 on the first floor is connected to the space between the joint steel pipe 11 of the column-beam joint 3 and the four outer jacket members 14. Here, a gap-forming ring member (not shown) is placed between the lower end of the outer steel pipe 6 and the first floor concrete floor plate 10, and a gap-forming ring member (not shown) is placed between the upper end of the outer steel pipe 6 and the lower ends of the four outer jacket members 14 welded to the column-beam joint 3.

Next, as shown in FIG. 5(d), concrete is poured from a concrete pouring hole (not shown) provided on the side of the outer steel pipe 6 of the first floor. When the entire internal space between the outer steel pipe 6 and the inner steel pipe 5 of the first floor is filled with concrete, the space between the joining steel pipe 11 of the column beam joint 3 and the four outer jacket members 14 is filled with concrete. As a result, the first concrete 7 is filled in the space between the outer steel pipe 6 and the inner steel pipe 5 of the first floor and the space between the joining steel pipe 11 of the column beam joint 3 and the four outer jacket members 14. In addition, the floor plate concrete 10 is laid on the steel beam 4 as the floor of the second floor. Then, when the first concrete 7 solidifies, the annular gap forming ring member arranged between the lower end of the outer steel pipe 6 and the floor plate concrete 10 of the first floor and the gap forming ring member arranged between the upper end of the outer steel pipe 6 and the lower end of the outer jacket member 14 of the column beam joint 3 are removed. By removing the gap-forming circulation member in this way, a gap is provided between the lower end of the outer steel pipe 6 and the concrete floor plate 10 of the first and second floors, and a gap is provided between the upper end of the outer steel pipe 6 and the outer cover member 14 of the column-beam joint 3, so that bending moment and axial force are not applied to the outer steel pipe 6, and therefore there is no need to make the plate excessively thick, which is economical. Note that while an example of pouring concrete has been shown, this is not limited to this, and concrete can also be filled by dropping it in, etc.

Next, as shown in Fig. 5(e), the outer steel pipe 6 is placed coaxially on the outside of the inner steel pipe 5 of the second floor, and the first concrete 7 is filled into the space between the outer steel pipe 6 and the inner steel pipe 5 of the second floor, thereby constructing the SC column 2 of the second floor. Note that, although the method of construction for each floor has been shown, it is not limited to this, and a method of dropping in multiple layers at once is also possible.
In this way, by repeating the steps of Figures 5(a) to 5(e) for the second and upper floors, a structure comprising SC columns 2, column-beam joints 3, and steel beams 4 is constructed.

Next, the effects of the construction method of the first embodiment shown in FIG. 5(a) to FIG. 5(e) will be described.
In the construction method of this embodiment, the outer steel pipe 6 functions as reinforcement and formwork, making it possible to significantly shorten the construction period and improve workability.
In addition, the inner spaces of the inner steel pipe 5 of the SC column 2 and the connecting steel pipe 11 of the column-beam joint 3 are connected to each other, and the first concrete 7 is simultaneously filled into the inner steel pipe 5 and the connecting steel pipe 11 by a single concrete injection operation. In addition, the space between the inner steel pipe 5 and the outer steel pipe 6 of the SC column 2 and the space surrounded by the joint 13 and the outer mantle member 14 of the connecting steel pipe 11 of the column-beam joint 3 are also connected to each other, and the first concrete 7 is simultaneously filled between the inner steel pipe 5 and the outer steel pipe 6 and between the connecting steel pipe 11, the joint 13, and the outer mantle member 14 by a single concrete injection operation. In this way, the construction method of this embodiment can efficiently perform the concrete filling operation in a short time, thereby further improving the workability.

[Column-beam joint structure of the second embodiment]
Next, Fig. 6 shows a column-beam joint structure according to a second embodiment of the present invention. The same components as those in the first embodiment shown in Figs. 1 to 5 are given the same reference numerals and the description thereof will be omitted.
In this embodiment, as shown in Figure 6, linear column reinforcement bars 15 embedded in the first concrete 7 are arranged to extend continuously in the vertical direction into the space between the inner steel pipe 5 and the outer steel pipe 6 of the SC column 2 on the first floor, the space between the joining steel pipe 11 and the four outer sheath members 14 of the column-beam joint 3, and the space between the inner steel pipe 5 and the outer steel pipe 6 of the SC column 2 on the second floor.

These column reinforcement bars 15 are arranged at a specified interval in the circumferential direction inside the first concrete 7, and include divided column reinforcement bars 15a rising from the foundation concrete 1, divided column reinforcement bars 15b welded to the divided column reinforcement bars 15a and extending upward, divided column reinforcement bars 15c welded to the divided column reinforcement bars 15b and extending to the column-beam joint 3, and divided column reinforcement bars 15d welded to the divided column reinforcement bars 15c and extending between the inner steel pipe 5 and the outer steel pipe 6 of the SC column 2 on the second floor. Note that while an example of welded joints is shown, this is not limiting, and mechanical joints and lap joints are also envisioned.

In the SC column 2 of the second embodiment, the column reinforcement bars 15 are embedded in the first concrete 7 filled between the inner steel pipe 5 and the outer steel pipe 6, so that when a bending moment is applied, the tensile resistance force of the column reinforcement bars 15 acts, thereby improving the bending strength.
In addition, the bending strength of the column-beam joint 3 is improved by embedding column reinforcement bars 15 in the first concrete 7 filled between the joining steel pipe 11 and the four outer jacket members 14 surrounding the outer periphery of the joining steel pipe 11.

Therefore, the column-beam joint 3 of the second embodiment can also smoothly transmit stress between the SC column 2 and the steel beam 4.
As a modified example of the column-beam joint structure of the second embodiment, the divided column reinforcement 15b shown in FIG. 6 may be eliminated, and the bending moment of the column-beam joint 3 may be borne by the divided reinforcement bar 15c.
Here, the column-beam joint reinforcement described in the present invention corresponds to the split column reinforcement 15c extending vertically through the column-beam joint 3.

[Column-beam joint structure of the third embodiment]
Furthermore, FIG. 7 shows a column-beam joint structure according to a third embodiment of the present invention.
In this embodiment, similar to the column-beam joint structure of the second embodiment, multiple column reinforcement bars 15 are arranged extending continuously in the vertical direction in the space between the inner steel pipe 5 and outer steel pipe 6 of the SC column 2 on the first floor and in the space between the inner steel pipe 5 and outer steel pipe 6 of the SC column 2 on the second floor.
The present embodiment differs from the second embodiment in that the four outer cover members 14 that constituted the column-beam joint 3 in the second embodiment have been removed, and multiple joint reinforcement bars 16 are arranged so as to extend in a loop shape around the connecting steel pipe 11, penetrating the web 13c of the joint 13 of the column-beam joint 3, and a third concrete 17 in which the multiple joint reinforcement bars 16 are embedded is filled.

In the third embodiment, the column-beam joint 3 has multiple joint reinforcement bars 16 arranged around the joining steel pipe 11, and these multiple joint reinforcement bars 16 are embedded in the third concrete 17, thereby increasing the shear strength of the column-beam joint 3.
Therefore, the column-beam joint 3 of the third embodiment can also smoothly transmit stress between the SC column 2 and the steel beam 4.
In the above embodiment, the inner steel pipe 5 is a square steel pipe, but it may be a circular steel pipe or a polygonal steel pipe, and the outer steel pipe 6 is a circular steel pipe, but it may be a square steel pipe or a polygonal steel pipe.

In the first and second embodiments, the second concrete 8 is filled in the internal space of the inner steel pipe 5, and the first concrete 7 is filled in the space surrounded by the outside of the inner steel pipe 5 and the inside of the outer steel pipe 6, and the space surrounded by the outside of the connecting steel pipe 11 and the inside of the outer jacket member 14. However, if the cross-sectional area of the inner steel pipe 5 is increased to increase the axial compressive strength, it is not necessary to fill the second concrete 8 in the internal space of the inner steel pipe 5.

1. Foundation concrete 2. Steel pipe concrete pillar (SC pillar)
3 Column-beam joint 4 Steel beam 5 Inner steel pipe 6 Outer steel pipe 7 First concrete 8 Second concrete AP Anchor plate 9 Anchor bolt 10 Floor plate concrete 11 Joint steel pipe 6a, 6b Divided body 6a1, 6a2, 6b1, 6b2 Flange 12a, 12b Diaphragm 13 Connection 13a, 13b Flange 13c Web 14 Outer jacket member 15 Column reinforcement 15a, 15b, 15d Divided column reinforcement 15c Divided column reinforcement (column-beam joint reinforcement)
16 Joint reinforcement bar 17 Third concrete

Claims (10)

A structure in which a steel pipe concrete column and a steel beam are joined at a column-beam joint,
The steel pipe concrete column is
An inner steel pipe arranged to extend in the vertical direction;
An outer steel pipe arranged coaxially on the outside of the inner steel pipe;
a first concrete filled in an annular space surrounded by an outside of the inner steel pipe and an inside of the outer steel pipe;
The column-beam joint is
A joining steel pipe which is an upper part of the inner steel pipe and has a diaphragm on its outer periphery;
A plurality of connections that connect the steel beams via the diaphragm;
A plurality of outer jacket members connected to the plurality of joints and surrounding an outer periphery of the joining steel pipe;
an outer circumferential space surrounded by the outside of the joining steel pipe and the inside of the multiple outer jacket members and communicating with the annular space;
A joint structure between a steel pipe concrete column and a steel beam, characterized in that the outer space is filled with the same first concrete as the annular space. A structure in which a steel pipe concrete column and a steel beam are joined at a column-beam joint,
The steel pipe concrete column is
An inner steel pipe arranged to extend in the vertical direction;
An outer steel pipe arranged coaxially on the outside of the inner steel pipe;
a first concrete filled in an annular space surrounded by an outside of the inner steel pipe and an inside of the outer steel pipe;
The column-beam joint is
A joining steel pipe which is an upper part of the inner steel pipe and has a diaphragm on its outer periphery;
A plurality of connections that connect the steel beams via the diaphragm;
A plurality of outer jacket members connected to the plurality of joints and surrounding an outer periphery of the joining steel pipe;
The first concrete is filled in an outer peripheral space surrounded by the outside of the joining steel pipe and the inside of the multiple outer jacket members,
The steel pipe concrete column is provided with a second concrete filled in an internal space of the inner steel pipe,
A joint structure between a steel pipe concrete column and a steel beam, characterized in that the column-beam joint has the second concrete filled in the internal space of the connecting steel pipe. The joint structure between a steel pipe concrete column and a steel beam according to claim 1 or 2, characterized in that the outer steel pipe is composed of a plurality of segments divided into two or more in the circumferential direction, and the plurality of segments are joined together. The joint structure between a steel pipe concrete column and a steel beam as described in any one of claims 1 to 3, characterized in that a floor concrete is laid on top of the steel beam. A column reinforcing bar is embedded in the first concrete of the steel pipe concrete column so as to extend in the vertical direction,
A column-beam joint reinforcement is embedded in the first concrete of the column-beam joint so as to extend in the vertical direction,
The joint structure between a steel pipe concrete column and a steel beam as described in any one of claims 1 to 4, characterized in that the column reinforcement and the column-beam joint reinforcement are identical steel bars extending in the vertical direction. A method for constructing a structure in which a steel pipe concrete column and a steel beam are joined at a column-beam joint, comprising the steps of:
The steel pipe concrete column comprises an inner steel pipe and an outer steel pipe having an inner diameter larger than that of the inner steel pipe and composed of a plurality of divided bodies divided into two or more in the circumferential direction,
The column-beam joint is an upper portion of the inner steel pipe, and includes a joining steel pipe having a diaphragm on its outer periphery, a plurality of joints that join the steel beam via the diaphragm, and a plurality of outer jacket members that are connected to the plurality of joints and can surround the outer periphery of the joining steel pipe,
a step of erecting the inner steel pipe on a foundation concrete;
A step of arranging the plurality of split bodies on the outside of the inner steel pipe and joining them to arrange an outer steel pipe;
a step of connecting the multiple outer jacket members to the multiple joints so that an outer peripheral space surrounded by the outside of the joining steel pipe and the inside of the multiple outer jacket members is connected to an annular space surrounded by the outside of the inner steel pipe and the inside of the outer steel pipe;
A method for constructing a joint structure between a steel pipe concrete column and a steel beam, comprising a step of filling the annular space and the outer peripheral space, which are connected to each other, with a first concrete. A method for constructing a structure in which a steel pipe concrete column and a steel beam are joined at a column-beam joint, comprising the steps of:
The steel pipe concrete column comprises an inner steel pipe and an outer steel pipe having an inner diameter larger than that of the inner steel pipe and composed of a plurality of divided bodies divided into two or more in the circumferential direction,
The column-beam joint is an upper portion of the inner steel pipe, and includes a joining steel pipe having a diaphragm on its outer periphery, and a plurality of connections that join the steel beams via the diaphragm,
a step of erecting the inner steel pipe on a foundation concrete;
A step of arranging the plurality of split bodies on the outside of the inner steel pipe and joining them to arrange an outer steel pipe;
A step of arranging a joint reinforcement extending in a loop shape in an outer peripheral space of the joint steel pipe communicating with an annular space surrounded by the outside of the inner steel pipe and the inside of the outer steel pipe;
A method for constructing a joint structure between a steel pipe concrete column and a steel beam, comprising a step of filling the annular space and the outer peripheral space, which are connected to each other, with a first concrete. The method for constructing a joint structure between a steel pipe concrete column and a steel beam according to claim 6 or 7, characterized in that it includes a step of placing column reinforcement bars extending in the vertical direction in the annular space and the outer peripheral space. The method for constructing a joint structure between a steel pipe concrete column and a steel beam as described in claim 6 or 7, characterized in that it includes a step of placing a column-beam joint reinforcement bar extending in the vertical direction in the outer peripheral space. The method for constructing a joint structure between a steel concrete column and a steel beam according to any one of claims 6 to 9, further comprising a step of filling the internal space of the inner steel pipe and the connecting steel pipe with second concrete.

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