JP7832037B2 - Joining member, method for manufacturing a joining member, joining structure between column and beam - Google Patents

Description

This invention relates to a joining member, etc., for joining beams of different heights to a rectangular steel pipe column.

Conventionally, in structures using rectangular steel pipe columns, beams made of H-shaped steel are sometimes joined. When joining columns and beams, it is necessary to efficiently transfer stress from the beam to the column at the joint. For this purpose, a through-diaphragm corresponding to the height of the beam's flange is required. A through-diaphragm is a plate-like member joined between columns by welding or other means. When a through-diaphragm is used, the beam's flange is butted against the side of the through-diaphragm and welded.

However, the size (height) of the beams joined to the columns may not be the same in all directions. For example, a beam with a lower height may be joined in only one direction. In such cases, at least one of the upper or lower flanges of that beam cannot be joined to the through diaphragm to which the other beams are joined.

As a column-beam joint structure for joining beams of different heights, a method has been disclosed (Patent Document 1) in which, when there is a step difference in the flanges of the left and right beams, multiple diaphragms are provided at the respective flange positions, and the beams are joined by non-scallop welding, which does not provide scallops (notches for welding) at the ends of the beams, in order to create a structure with excellent mechanical properties such as deformation performance.

Japanese Patent Publication No. 2001-329613

However, as described in Patent Document 1, the process of installing an internal diaphragm inside the column has problems such as requiring a large amount of welding and poor workability. Furthermore, the structure described in Patent Document 1 requires the column-beam joint to be integrally molded, resulting in a large mass of metal parts and high cost.

Furthermore, joining the internal diaphragm to the column requires working space for welding. However, if the heights of the beams being joined differ, and the difference is small, the internal diaphragm and the through diaphragm will be too close together, making it impossible to secure sufficient space for welding. In such cases, the internal diaphragm cannot be joined.

Furthermore, the diaphragms used to connect beams are typically selected according to the size of the columns. Therefore, to accommodate multiple column sizes, a diaphragm of each size is required. This results in a large variety of components, making inventory management and on-site handling difficult.

This invention has been made in view of the above problems, and aims to provide a joining member that can accommodate beams of different heights when joining them to a square steel pipe column, even when the difference in beam height is small, and that can easily accommodate columns of different sizes.

To achieve the aforementioned objective, the first invention is a beam joining member for a column, characterized in that it is a substantially rectangular annular member formed by joining four plate-shaped segments corresponding to the sides of the column and four corner segments corresponding to the corners of the column, at least two of the plate-shaped segments have protruding portions that project outward and to which the flange portion of the beam is joined, the height positions at which the protruding portions are formed on at least two of the plate-shaped segments are different from each other, a flat surface is formed on a part of the outer surface of the corner segment, and the flat surface of the corner segment and the outer surface of the protruding portion of the plate-shaped segment are substantially the same plane .

The second invention is a beam joining member for a column, characterized in that it is a substantially rectangular annular member formed by joining four plate-shaped segments corresponding to the sides of the column and four corner segments corresponding to the corners of the column, at least two of the plate-shaped segments have protrusions that project outward and to which the flange portion of the beam is joined, the height positions at which the protrusions are formed on at least two of the plate-shaped segments are different from each other, and a projection is formed on the joining surface of the corner segment with the plate-shaped segments, and the positioning of the corner segment and the plate-shaped segments is possible by the projection contacting the plate-shaped segments .

According to the first and second inventions, in a substantially rectangular annular member, protrusions are formed on at least two surfaces (two directions) to which the flanges of beams are joined, and by changing the height position where the protrusions are located depending on the direction, beams of different sizes can be joined.

Furthermore, since the connecting member is formed by joining and integrating multiple plate-shaped segments and corner segments, many variations can be accommodated by combining a minimum number of segment types. In this case, because four plate-shaped segments are joined and integrated, the beam's connection position can be changed for each of the four faces (four directions).

Furthermore, if the outer surface of the corner segment and the outer surface of the protruding portion of the plate-shaped segment are approximately aligned, the beam can be joined so as to span both the corner segment and the plate-shaped segment. This allows for a longer beam joint length, enabling more efficient stress transfer from the beam to the column.

Furthermore, by forming a projection on the joint surface of the corner segment with the plate-shaped segment, and bringing the projection into contact with the plate-shaped segment, the positioning of the corner segment and the plate-shaped segment becomes easier.

The third invention is a method for manufacturing a joining member according to the first and second inventions, characterized in that plate-shaped segmented pieces of the same cross-sectional shape but different lengths are prepared, the corner segmented piece is used as a common member, and by selecting plate-shaped segmented pieces of different lengths according to the size of the column, it is possible to manufacture joining members of different sizes.

According to the third invention, plate-shaped segments of the same cross-sectional shape but different lengths are prepared from a long extruded material, and the corner segments are used as common members, so that plate-shaped segments of different lengths can be selected according to the size of the column. Therefore, joining members of different sizes can be easily manufactured.

The fourth invention is a method for manufacturing a joining member according to the second invention, characterized in that a groove is formed on the inner surface of the plate-shaped segment, the projection is brought into contact with the outer surface of the plate-shaped segment, and when welding from the inner surface of the plate-shaped segment, the projection functions as a backing for the groove.

According to the fourth invention, by forming a groove on the inner surface of the plate-shaped segment and bringing the projection of the corner segment into contact with the outer surface of the plate-shaped segment, the positioning of the corner segment and the plate-shaped segment is made easy. Furthermore, when welding from the inner surface of the plate-shaped segment, the projection can function as a backing for the weld.

The fifth invention is a column-beam joint structure using the joint members according to the first and second inventions, characterized in that the joint members are joined to the column, beams of different heights are arranged in different directions of the joint members, and the upper and/or lower flange portions of the beams are joined to the protruding portion.

According to the fifth invention, a joint structure can be obtained in which beams of different heights are arranged on different surfaces of a joint member joined to a column.

According to the present invention, when joining beams of different heights to a rectangular steel pipe column, it is possible to accommodate even small differences in beam height, and it is possible to provide joining members that can easily accommodate columns of different sizes.

A perspective view showing column-beam joint structure 1. A perspective view showing the joining member 3. (a) is a perspective view showing plate-shaped segment 5a, and (b) is a perspective view showing plate-shaped segment 5b. (a) is a perspective view showing the corner division piece 4, and (b) is a plan view of the corner division piece 4. (a) and (b) are diagrams showing the joint structure of the connecting member 3 and beams 7a and 7b when viewed from different directions. (a) and (b) are diagrams showing other forms of the protruding portion 11. (a) is a diagram showing the corner-shaped segmented material 23, (b) is a diagram showing the plate-shaped segmented material 24a, and (c) is a diagram showing the plate-shaped segmented material 24b. (a) and (b) are diagrams showing connecting members 3 of different sizes. A perspective view showing the corner division piece 4a. (a) to (c) are diagrams showing the manufacturing process of the joining member using the corner division piece 4a.

The following describes a column-beam joint structure 1 according to an embodiment of the present invention. Figure 1 is a perspective view showing the column-beam joint structure 1. The column-beam joint structure 1 is a structure in which multiple beams 7a and 7b are joined to the side surface of a column 6.

Column 6 is a hollow rectangular steel pipe column, and beams 7a and 7b are H-shaped steel beams. Beams 7a and 7b have different heights. In the example shown in Figure 1, beam 7a is formed in one direction of column 6, and beams 7b are formed in the other three adjacent directions. However, this is not limited to this configuration, and beams 7a may be provided in multiple directions.

A diaphragm 9 is joined to the column 6. The diaphragm 9 is a through-diaphragm that protrudes outward from the column 6. A connecting member 3 is provided at a predetermined distance from the column 6 to the diaphragm 9. The dimensions of the connecting member 3 and the diaphragm 9 in plan view are approximately the same. That is, the amount of protrusion of the diaphragm 9 and the connecting member 3 relative to the side surface of the column 6 is approximately the same. In the illustrated example, the diaphragm 9 is provided above and the connecting member 3 is provided below, but this may be reversed, or instead of the diaphragm 9, a pair of connecting members 3 may be arranged vertically at a predetermined distance.

The ends of the upper and lower flanges of beam 7a are joined to the diaphragm 9 and the connecting member 3 by welding, respectively. Similarly, the ends of the upper and lower flanges of beam 7b are joined to the diaphragm 9 and the connecting member 3 by welding, respectively. In other words, the diaphragm 9 and the connecting member 3 serve as the components that connect beams 7a and 7b to the column 6.

Figure 2 is a perspective view of the joining member 3, Figure 3(a) is a perspective view showing the plate-shaped segment 5a, Figure 3(b) is a perspective view showing the plate-shaped segment 5b, and Figure 4(a) is a perspective view showing the corner segment 4. The joining member 3 is a roughly rectangular annular member having four faces corresponding to the sides of the column, and has a roughly square outer shape in plan view. The joining member 3 is constructed by joining and integrating four plate-shaped segments 5a and 5b with four corner segment segments 4. The plate-shaped segments 5a and 5b correspond to the respective faces of the column 6, and the corner segment segments 4 correspond to the corners of the column 6. Since the corner segment segments 4 and the plate-shaped segments 5a and 5b are joined by welding, grooves for welding may be formed, for example, on the outer or inner surface.

As shown in Figure 3(a), a projection 11 is formed on the outer surface of the plate-shaped segmented piece 5a, projecting outward. The projection 11 extends along its entire length in the longitudinal direction. Here, A in the figure represents the height direction, and B represents the thickness direction. That is, the projection 11 is the part that is thicker than other parts. Furthermore, in the plate-shaped segmented piece 5a, the projection 11 is formed approximately in the center in the height direction.

As shown in Figure 3(b), the plate-shaped segment 5b, like the plate-shaped segment 5a, has a projection 11 that protrudes outward on its outer surface. In the plate-shaped segment 5b, the projection 11 is formed along the entire length in the longitudinal direction at one end (lower end) in the height direction. That is, the height at which the projection 11 is formed (the height position of the center of the projection 11 in the height direction) differs between the plate-shaped segment 5a and the plate-shaped segment 5b.

Furthermore, as shown in Figure 4(a), the corner division piece 4 has curved portions on its inner and outer surfaces that correspond to the curved shape of the corner of the column 6. Here, as shown in Figure 4(b), a flat surface 17 is formed on the outer surface of the corner division piece 4, continuous with the curved portion. As will be described in detail later, the flat surface 17 becomes part of the joint with the beam.

Here, the plate-shaped segments 5a and 5b both have the same cross-sectional shape in the longitudinal direction (direction C in Figures 3(a) and 3(b)). Furthermore, the corner segment 4 has the same cross-sectional shape in the height direction (direction A in Figure 4(a)).

As shown in Figure 2, by combining four plate-like segments 5a and 5b of approximately the same length with a corner segment 4, a roughly rectangular annular member is formed. Here, the heights of all corner segment 4 and plate-like segments 5a and 5b are approximately the same. The upper and lower surfaces of the joining member 3 become the column joint 13 to which the column 6 is joined. In this case, a curved shape corresponding to the shape of the column 6 is formed on the inner surface of the joining member 3, allowing the thickness of the column 6 and the thickness of each plate-like segment 5a and 5b (excluding the protruding portion 11) to be brought close together.

Figure 5(a) shows the joint structure between the column and beam as viewed from the beam 7b side, and Figure 5(b) shows the joint structure between the column and beam as viewed from the beam 7a side. As mentioned above, beams 7a and 7b are H-shaped steel beams consisting of a pair of flange portions 19 and a web portion 21 that connects the flange portions 19.

The upper flange portions 19 of beams 7a and 7b are joined to the diaphragm 9 by welding. The lower flange portions 19 of beams 7a and 7b are joined to the connecting member 3 by welding. That is, the distance between the diaphragm 9 and the protruding portion 11 of the connecting member 3, with respect to each direction (side) of the column 6, coincides with the distance between the flange portions 19 of beams 7a and 7b.

As mentioned above, the plate-shaped segment 5a and plate-shaped segment 5b have different heights at which the protruding portion 11 is formed. Furthermore, the protruding portion 11 forms the joint portion of the flange portion 19 of beams 7a and 7b. That is, the height at which the flange portion 19 is joined differs depending on the direction in which plate-shaped segment 5a is positioned and the direction in which plate-shaped segment 5b is positioned. Therefore, in the direction in which plate-shaped segment 5a is positioned, the distance between the diaphragm 9 and the protruding portion 11 of the joining member 3 is relatively narrow, and the lower beam 7a is joined. Conversely, in the direction in which plate-shaped segment 5b is positioned, the distance between the diaphragm 9 and the protruding portion 11 of the joining member 3 is relatively wide, and the higher beam 7a is joined. Thus, in the column-beam joint structure 1, beams 7a and 7b of different heights are positioned on different faces of the joining member 3, and the upper and/or lower flange portions 19 of beams 7a and 7b are joined to the protruding portion 11.

As shown in Figure 2, the protruding portion 11 is positioned outward and forms a beam joint 15 to which either beam 7a or beam 7b is joined. Here, the length of the side end of the corner division piece 4 (D in Figure 4(b)) and the total thickness of the protruding portion 11 of the plate-like division pieces 5a and 5b are approximately the same. Therefore, the outer surface of the corner division piece 4 and the outer surface position of the protruding portion 11 of the plate-like division pieces 5a and 5b are approximately coincidental, and no large step difference is formed between the protruding portion 11 and the corner division piece 4.

Furthermore, as mentioned above, a flat surface 17 of a predetermined length is formed on the outer surface of the corner division piece 4. That is, the outer surface of the protrusion 11 and the flat surface 17 of the corner division piece 4 form the same plane. In other words, a flat surface 17 is formed on a portion of the outer surface of the corner division piece 4, and the flat surface 17 of the corner division piece 4 and the outer surface of the protrusion 11 of the plate-shaped division piece 5a or plate-shaped division piece 5b are substantially on the same plane. Therefore, the beam joint 15 is formed to span both the protrusion 11 of the plate-shaped division pieces 5a and 5b and the flat surface 17 of the corner division piece 4. As a result, the flange portions 19 of the beams 7a and 7b can be joined so as to span both the plate-shaped division pieces 5a and 5b and the corner division piece 4. This ensures that the joining length of the flange portions 19 of the beams 7a and 7b is secured, and stress from the beams 7a and 7b can be reliably transmitted to the column 6.

Here, the height difference in which the protrusions 11 are formed on the plate-shaped segmented pieces 5a and 5b is, for example, 100 mm or less, and may be even 50 mm or less. Thus, this embodiment is particularly effective when it is difficult to install an internal diaphragm, such as when the height difference between beams 7a and 7b is 100 mm or less, and even 50 mm or less.

The cross-sectional shape of the protruding portion 11 does not have to be approximately rectangular. For example, as shown in Figure 6(a), it may be a trapezoidal shape in which the length of the protruding portion 11 in the height direction (direction A in the figure) decreases in a roughly linear fashion towards the tip side (right side in the figure) in the thickness direction (B in the figure). Alternatively, as shown in Figure 6(b), the length of the protruding portion 11 in the height direction (direction A in the figure) may decrease in a curved fashion towards the tip side (B in the figure). In other words, the protruding portion 11 may have a shape in which the width gradually changes from the tip to the base. The shape of the protruding portion 11 may be the same for the plate-like divided pieces 5a and 5b, or it may be different.

Next, the manufacturing method for the joining members will be described. Figure 7(a) shows the corner section material 23, Figure 7(b) shows the plate-shaped section material 24a, and Figure 7(c) shows the plate-shaped section material 24b. The corner section material 23, and the plate-shaped section materials 24a and 24b are all extruded materials having the same cross-sectional shape in the longitudinal direction. By cutting the corner section material 23 and the plate-shaped section materials 24a and 24b to predetermined lengths, the corner section 4 and the plate-shaped section pieces 5a and 5b can be formed.

As mentioned above, the height of the corner segment 4 (corresponding to the length direction of the corner segment material 23) is approximately the same as the height of the plate-like segments 5a and 5b (corresponding to the width direction of the plate-like segment materials 24a and 24b). Therefore, the height of the corner segment 4 is determined according to the plate-like segments 5a and 5b being combined. On the other hand, the length of the plate-like segments 5a and 5b (corresponding to the length direction of the plate-like segment materials 24a and 24b) can be varied for the same corner segment 4.

Figures 8(a) and 8(b) show a joint member 3 formed by joining a single corner section 4 with plate-shaped sections 5a and 5b of different lengths. In this way, by using the corner section 4 as a common member from plate-shaped section materials 24a and 24b, and preparing plate-shaped sections 5a and 5b of different lengths, it is possible to manufacture joint members 3 of different sizes by selecting plate-shaped sections 5a and 5b of different lengths according to the size of the column. Thus, the same corner section material 23 and plate-shaped section materials 24a and 24b can be used to manufacture joint members 3 of different sizes.

As described above, according to this embodiment, beams 7a and 7b of different heights can be joined to the column 6, and stress from beams 7a and 7b can be efficiently transmitted to the column 6. Furthermore, this method can be applied even when the height difference between beams 7a and 7b is small, such as when an internal diaphragm cannot be installed.

Furthermore, since the joining member 3 is formed by combining and joining corner division pieces 4 and plate-shaped division pieces 5a and 5b with different heights of protrusions 11, it is only necessary to select the plate-shaped division pieces 5a and 5b to be used according to the arrangement of beams 7a and 7b in relation to the direction of each column 6, thus allowing for many variations with a small number of parts. In the embodiment described above, two types of plate-shaped division pieces 5a and 5b were combined, but three or more types of division pieces with different heights of protrusions 11 may also be combined.

Furthermore, since the projection 11 is not formed at the center of the height of the plate-shaped segment 5b, the height of the projection 11 can be changed by using it upside down. For example, even with two types of plate-shaped segments 5a and 5b, the height of the projection 11 can be selected from three different heights: lower, central, and upper.

Furthermore, since the outer surface of the protruding portion 11 and the outer surface of the corner division piece 4 are formed on the same plane, the approximately entire length of the side of the joining member 3 can be used as the beam joint portion 15.

Next, a second embodiment will be described. Figure 9 is a perspective view showing the corner division piece 4a according to the second embodiment. In the following description, components that perform the same functions as those in the first embodiment are denoted by the same reference numerals as in Figures 1 to 8, and redundant explanations are omitted.

The corner division piece 4a has substantially the same structure as the corner division piece 4, but differs in that a projection 25 is formed on the joint surface of the corner division piece 4a with the plate-shaped division pieces 5a and 5b. In the illustrated example, the projection 25 is formed in all parts except the central part in the height direction.

Figures 10(a) to 10(c) illustrate the manufacturing process of a joint member using corner division pieces 4a. First, as shown in Figure 10(a), a plate-shaped division piece 5a is placed between a pair of corner division pieces 4a.

Next, as shown in Figure 10(b), the plate-shaped segment 5a is positioned from the inside of the corner segment 4a so as to contact the projection 25. At this time, the projection 11 of the plate-shaped segment 5a does not interfere with the projection 25 due to the notch in the projection 25 of the corner segment 4a. By bringing the plate-shaped segment 5a into contact with the projection 25 in this way, the outer surface of the projection 11 and the outer surface of the corner segment 4a become substantially flush. In other words, the projection 25 facilitates the positioning of the plate-shaped segment 5a relative to the corner segment 4a.

Here, grooves 27 are formed on the inner surfaces of both ends of the plate-shaped segmented piece 5a (the surfaces opposite to the surface where the protrusion 11 is formed). The grooves 27 are the areas for welding the plate-shaped segmented piece 5a to the corner segmented piece 4a.

As shown in Figure 10(c), the projection 25 is brought into contact with the outer surface of the plate-shaped segment 5a (the outer surface other than the protruding portion 11), and the plate-shaped segment 5a and the corner segment 4a can be joined by welding from the inner side of the plate-shaped segment 5a in the groove 27. In this case, since the projection 25 is located on the back side of the groove 27, it can function as a backing during welding.

In the example described above, the method for joining the plate-shaped segment 5a was explained. However, when joining with the plate-shaped segment 5b, as shown in Figure 9, the projection 25 only needs to be formed on one end in the height direction corresponding to the protruding portion 11 of the plate-shaped segment 5b. Furthermore, when joining the plate-shaped segment 5a and plate-shaped segment 5b to both sides of a single corner segment 4a, the notch position of the projection 25 may be changed depending on the two directions (joining surfaces) of the corner segment 4a. For example, on one end of the corner segment 4a, the projection 25 may be formed except for the approximately central part in the height direction, and on the other end of the corner segment 4a, the projection 25 may be formed except for one end in the height direction.

Furthermore, as mentioned above, the corner segment 4a is manufactured from the corner segment material 23 having the same cross-sectional shape, and notches are formed only at the protruding portion 11 of the plate-shaped segment pieces 5a and 5b to be joined (the projections 25 are removed). In this way, the corner segment 4a can be easily manufactured.

Alternatively, a projection 25 may be formed along the entire height of the corner segment 4a, and a notch may be formed on the plate-shaped segment 5a and 5b to be joined to avoid interference with the projection 25. In this case, the projection 25 of the corner segment 4a can be slid into the notched groove of the plate-shaped segment 5a and 5b from the top and bottom.

According to the second embodiment, the same effects as the first embodiment can be obtained. Furthermore, by forming a projection 25 on the end face of the corner segment 4a, positioning between the plate-shaped segment 5a, 5b and the corner segment 4a becomes easier. Also, by providing a groove 27 on the plate-shaped segment 5a, 5b on the side opposite to the contact surface with the projection 25, the projection 25 can function as a backing for welding.

The embodiments of the present invention have been described above with reference to the attached figures, but the technical scope of the present invention is not limited to the embodiments described above. It will be clear to those skilled in the art that various modifications or alterations can be conceived within the scope of the technical idea described in the claims, and these will naturally also fall within the technical scope of the present invention.

For example, it goes without saying that the configurations in each of the embodiments described above can be combined with each other. Furthermore, the surface opposite to the surface where the protrusion 11 is formed, other than the column joint 13, may be thinned. Also, although the example shown illustrates all columns 6 being of the same size, the sizes of the columns joined above and below the joining member or diaphragm 9 may be varied, for example.

Furthermore, the protrusion 11 only needs to be formed in the direction in which the beams are joined. That is, the joining member is composed of a plate-like segment having protrusions 11 projecting outward on at least two surfaces, and the height positions at which the protrusions 11 are formed on at least two surfaces are different. Thus, at least one surface may be composed of a plate-like segment (flat plate) without the protrusion 11.

Furthermore, the height-direction length of the protrusion 11 (length in direction A in Figure 3) may be increased for each segmented piece, allowing the flange portion 19 to be joined at different height positions using a single protrusion 11. Alternatively, multiple protrusions 11 may be arranged at different height positions for a single segmented piece.

1...Column and beam joint structure 3...Joint members 4, 4a...Corner division pieces 5a, 5b...Plate-shaped division pieces 6...Column 7a, 7b...Beam 9...Diaphragm 11...Protrusion 13...Column joint 15...Beam joint 17...Flat surface 19...Flange portion 21...Web portion 23...Corner division piece material 24a, 24b...Plate-shaped division piece material 25...Protrusion 27...Bevel

Claims (5)

A connecting member for a beam to a column,
It is a roughly rectangular annular member formed by joining together four plate-like segments corresponding to the sides of the column and four corner segments corresponding to the corners of the column.
At least two of the plate-shaped segmented pieces have protruding portions that project outward and to which the flange portion of the beam is joined.
The height positions at which the protrusions are formed in at least two of the plate-shaped divided pieces are different from each other.
A joining member characterized in that a flat surface is formed on a part of the outer surface of the corner division piece, and the flat surface of the corner division piece and the outer surface of the protruding portion of the plate-shaped division piece are substantially on the same plane . A connecting member for a beam to a column,
It is a roughly rectangular annular member formed by joining together four plate-like segments corresponding to the sides of the column and four corner segments corresponding to the corners of the column.
At least two of the plate-shaped segmented pieces have protruding portions that project outward and to which the flange portion of the beam is joined.
The height positions at which the protrusions are formed in at least two of the plate-shaped divided pieces are different from each other.
A protrusion is formed on the joint surface of the corner segment with the plate-shaped segment.
A joining member characterized in that the projection contacts the plate-shaped segment, thereby enabling the positioning of the corner segment and the plate-shaped segment . A method for manufacturing a joining member according to claim 1 or claim 2 ,
Prepare the aforementioned plate-shaped segments with the same cross-sectional shape but different lengths,
A method for manufacturing a joint member, characterized in that the corner division piece is used as a common member, and by selecting the plate-shaped division piece of different lengths according to the size of the column, it is possible to manufacture joint members of different sizes. A method for manufacturing a joining member according to claim 2 ,
A groove is formed on the inner surface of the plate-shaped segmented piece.
A method for manufacturing a jointed member, characterized in that the projection is brought into contact with the outer surface of the plate-shaped segment, and the projection functions as a backing for the groove when welding from the inner surface side of the plate-shaped segment. A column-to-beam joint structure using the joint member described in claim 1 or claim 2 ,
A column-beam joint structure characterized in that the joining member is joined to the column, beams of different heights are arranged in different directions of the joining member, and the upper and/or lower flange portions of the beams are joined to the protruding portion.