Column beam joint structure and construction method of column beam joint structure

Abstract

To achieve a column beam joint structure which can be easily constructed and to achieve a construction method of the column beam joint structure.SOLUTION: A column beam joint structure 1 does not require welding, and it can be easily constructed by fixing a first flat plate member 41 and a second flat plate member 42 by a bolt B with respect to a column 10, a first beam 20 and a second beam 30. Especially, in this column beam joint structure 1, four flat plate members 40 (two first flat plate members 41 and two second flat plate members 42) arranged in a substantially four-swirling shape in an upper surface view on an upper end side of the column 10 fix the column 10, the first beam 20 and the second beam 30, so that it does not become eccentric even when a large vibration such as an earthquake acts, and a twist hardly occurs in the column 10. Thus, the column beam joint structure 1 has a favorable bearing force.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a beam-column joint structure and a method for constructing the beam-column joint structure. [Background technology]

[0002] BACKGROUND ART Conventionally, there is known a technique for constructing a beam-column joint structure by fixing a steel beam to a steel column with bolts, without requiring on-site welding (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-168653 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the technology of Patent Document 1, there are problems such as the need to carry out certain processing in advance, such as welding a diaphragm to the column, and the inability to use a through beam structure, which increases the number of beam components and the number of joints, which can increase the construction period and cost.

[0005] An object of the present invention is to provide a column-beam joint structure that can be easily constructed and a construction method for a column-beam joint structure. [Means for solving the problem]

[0006] In order to achieve the above object, one invention of the present application is a column-beam joint structure, A column erected in a vertical direction and having two pairs of side surfaces arranged opposite each other, the paired side surfaces being parallel to each other and the non-paired side surfaces being perpendicular to each other; a first beam perpendicular to the column and installed on the upper end of the column; a second beam that is perpendicular to the first beam and is installed on the first beam, and is also perpendicular to the column; Equipped with A pair of flat plate members are configured so that one side surface of the column that is arranged opposite to the other and forms a pair of sides of the first beam is flush with the pair of sides of the first beam, and are fixed in surface contact with the one side surface of the column and the side surface of the first beam that are flush with each other; The other side surfaces of the column that are arranged opposite to each other and that form a pair of sides of the second beam are configured to be flush with each other with the first beam sandwiched therebetween, and a set of flat plate members that are fixed in surface contact with the other side surfaces of the column and the side surfaces of the second beam that are flush with each other; It has The four flat plate members of the two sets of flat plate members are arranged on the pillars in a generally four-legged cross shape when viewed from above. Here, a pillar that is erected in the vertical direction and has two pairs of side surfaces that are arranged opposite each other, with the paired side surfaces being parallel to each other and the unpaired side surfaces being perpendicular to each other, is, for example, a pillar whose cross section in a direction that intersects with its longitudinal direction is rectangular, or a pillar whose cross section in a direction that intersects with its longitudinal direction is approximately octagonal. In the case of a column whose cross section intersecting the longitudinal direction is approximately octagonal, the surfaces other than the two pairs of side surfaces arranged opposite each other do not have to be flat. In the following [Embodiment for carrying out the invention], a column erected in the vertical direction is a column whose cross section in a direction intersecting its longitudinal direction is rectangular.

[0007] A column-beam joint structure of this configuration does not require welding and can be constructed relatively easily by fixing four flat plate members to the column, first beam, and second beam with bolts or the like. In particular, in this column-beam joint structure, four flat plate members arranged in an approximately four-legged shape (propeller-shaped, swastika-shaped) when viewed from above on the upper end of the column secure the column, the first beam, and the second beam, making it less likely to become eccentric even when subjected to large vibrations such as those caused by an earthquake, and making it less likely for the column to twist. Since the four flat plate members arranged and fixed in this manner in a roughly four-legged shape when viewed from above can withstand large stresses, a column-beam joint structure equipped with such four flat plate members can be suitably used as a column-beam joint structure with bearing capacity.

[0008] Also, preferably, A reinforcing member is attached to the flat plate member. By reinforcing the flat plate member with a reinforcing member, it becomes possible to withstand greater stress, thereby improving the strength and yield strength of the beam-column joint structure.

[0009] In addition, other inventions according to the present application include: A construction method for constructing the above-mentioned column-beam joint structure, a step of fixing the four flat plate members to the upper end sides of the pillars in a generally four-legged arrangement when viewed from above; a step of placing the first beam between the pair of flat plate members fixed to the pair of side surfaces of the pillar, and erecting the first beam perpendicular to an upper end of the pillar; a step of disposing the second beam between the pair of flat plate members fixed to the other pair of side surfaces of the column, and erecting the second beam perpendicular to the first beam; a step of fixing the first beam to the set of flat plate members fixed to the one side surface; a step of fixing the second beam to the set of flat plate members fixed to the other side surface; It has been made to have.

[0010] This construction method for a column-beam joint structure makes it possible to easily construct a column-beam joint structure. In particular, when erecting a first beam perpendicular to the upper end of a column, the pair of flat plate members fixed to one pair of side surfaces of the column serve as guides when erecting the first beam, making it easy to adjust the position of the first beam. Similarly, when erecting a second beam perpendicular to the first beam, the pair of flat plate members fixed to the other pair of side surfaces of the column serve as guides when erecting the second beam, making it easy to adjust the position of the second beam. Furthermore, in a column-beam joint structure in which four flat plate members arranged in an approximately four-pronged shape (propeller-shaped or swastika-shaped) on the upper end of the column secure the column to the first and second beams, the column is less likely to become eccentric even when subjected to large vibrations such as those caused by an earthquake, making it less likely for the column to twist. Since the four flat plate members arranged and fixed in this manner in a roughly four-legged cross shape when viewed from above can withstand large stresses, a column-beam joint structure equipped with such four flat plate members can be suitably used as a column-beam joint structure with bearing capacity.

[0011] In addition, other inventions according to the present application include: A construction method for constructing the above-mentioned column-beam joint structure, a step of orthogonally connecting the first beam to the upper end of the column and erecting the first beam so that the pair of side surfaces of the column and the pair of side surfaces of the first beam are flush with each other; a step of orthogonally placing the second beam on the first beam and erecting the second beam so that the other side surface paired with the column and the pair of side surfaces of the second beam are flush with each other across the first beam; a step of fixing the set of flat plate members in surface contact with the one side surface of the column and the side surface of the first beam, which are flush with each other; a step of fixing the set of flat plate members in surface contact with the other side surface of the column and the side surface of the second beam, which are flush with each other; It has been made to have.

[0012] This construction method for a column-beam joint structure makes it possible to easily construct a column-beam joint structure. Furthermore, in a column-beam joint structure in which four flat plate members arranged in an approximately four-pronged shape (propeller-shaped or swastika-shaped) on the upper end of the column secure the column to the first and second beams, the column is less likely to become eccentric even when subjected to large vibrations such as those caused by an earthquake, making it less likely for the column to twist. Since the four flat plate members arranged and fixed in this manner in a roughly four-legged cross shape when viewed from above can withstand large stresses, a column-beam joint structure equipped with such four flat plate members can be suitably used as a column-beam joint structure with bearing capacity. [Effects of the Invention]

[0013] According to the present invention, a beam-column joint structure can be easily constructed. [Brief explanation of the drawings]

[0014] [Figure 1] 1A and 1B are perspective views showing the beam-column joint structure of this embodiment, viewed from different angles. [Figure 2] 1 is an exploded perspective view showing a beam-column joint structure according to an embodiment of the present invention; [Figure 3] FIG. 10 is an explanatory diagram showing the arrangement of four flat plate members in a beam-column joint structure as viewed from above. [Figure 4] FIG. 2 is a front view showing a first flat plate member (a) and a second flat plate member (b) in the beam-column joint structure. [Figure 5] 1A, 1B, 1C, and 1D are explanatory diagrams relating to the construction procedure of the beam-column joint structure of this embodiment. [Figure 6] 1A, 1B, and 1C are explanatory diagrams relating to the construction procedure of the beam-column joint structure of this embodiment. [Figure 7] FIG. 10 is a perspective view showing a modified example (c) of the beam-column joint structure together with construction procedures (a) and (b). [Figure 8] 1A and 1B are perspective views showing a modified example of a beam-column joint structure, viewed from different angles. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of a beam-column joint structure and a method for constructing a beam-column joint structure according to the present invention will be described in detail with reference to the drawings. However, although the embodiments described below have various limitations that are technically preferable for implementing the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

[0016] The column-beam joint structure 1 of this embodiment is a structure that can be used, for example, as a shed for a station platform, and can be used as a structure that supports the roof of a shed that has a roof installed on top of the column-beam joint structure 1.

[0017] The column-beam joint structure 1 of this embodiment, as shown in Figures 1(a)(b) and 2, for example, has a rectangular cross section in a direction intersecting the longitudinal direction and comprises a column 10 erected in the vertical direction, a first beam 20 erected on the upper end of the column 10 perpendicular to the column 10, and a second beam 30 erected on top of the first beam 20 perpendicular to the first beam 20 and also perpendicular to the column 10. For example, the long pillar 10 is arranged so as to extend along the Z-axis direction (vertical direction), the long first beam 20 is arranged so as to extend along the X-axis direction, and the long second beam 30 is arranged so as to extend along the Y-axis direction.

[0018] When this column-beam joint structure 1 is used as a shed for a station platform, for example, multiple columns 10 are arranged in two rows on the station platform extending in the Y-axis direction, a first beam 20 is hung across the left and right columns 10 lined up in the X-axis direction, and a second beam 30 is hung across the columns 10 lined up in the Y-axis direction to construct the column-beam joint structure 1, and a roof is then installed on the column-beam joint structure 1.

[0019] The column-beam joint structure 1 is configured so that one side surface 11 of the column 10, which is arranged opposite to each other, and a pair of side surfaces 21 of the first beam 20 are flush with each other, and includes a set of flat plate members 40 (41) that are fixed in face-to-face contact with the one side surface 11 of the column 10 and the side surfaces 21 of the first beam 20, which are flush with each other, and the other side surface 12 of the column 10, which is arranged opposite to each other, and a pair of side surfaces 31 of the second beam 30, which are flush with each other, with the first beam 20 sandwiched between them, and includes a set of flat plate members 40 (42) that are fixed in face-to-face contact with the other side surface 12 of the column 10 and the side surfaces 31 of the second beam 30, which are flush with each other. In particular, the four flat plate members 40 that make up the two sets of flat plate members 40 are arranged in a roughly four-legged cross shape in top view relative to the pillar 10, as shown in Fig. 3. The roughly four-legged cross shape arrangement here can be rephrased as a propeller-shaped arrangement or a swastika-shaped arrangement.

[0020] The column 10 is, for example, a square steel pipe having a substantially square cross section. The first beam 20 and the second beam 30 are also rectangular steel pipes with a substantially square cross section. In order to ensure that one side 11 of the column 10 is flush with the side 21 of the first beam 20, and that the other side 12 of the column 10 is flush with the side 31 of the second beam 30 with the first beam 20 sandwiched between them, square steel pipes with the same square cross-sectional shape are used for the column 10, the first beam 20, and the second beam 30. Here, a square steel pipe with a cross section of 150 mm on each side is used. Of course, the column 10, the first beam 20, and the second beam 30 each have a different predetermined length, and square steel pipes of different lengths are used. Furthermore, the first beam 20 and the second beam 30 are not divided at the point where they intersect with the column 10, but are continuous with each other in the form of a through beam (through beam). In other words, at the point where they intersect with the column 10, long square steel pipes are used for the first beam 20 and the second beam 30, and the square steel pipes are arranged in a manner that they extend in a predetermined direction on the column 10.

[0021] Incidentally, the state in which one side surface 11 of the column 10 and the side surface 21 of the first beam 20 are flush with each other means, in other words, the state in which one side surface 11 of the column 10 and the side surface 21 of the first beam 20 are in the same plane. Similarly, the state in which the other side 12 of the column 10 and the side 31 of the second beam 30 are flush with each other with the first beam 20 in between means, in other words, that the other side 12 of the column 10 and the side 31 of the second beam 30 are spaced apart with the first beam 20 in between, but the other side 12 of the column 10 and the side 31 of the second beam 30 are in the same plane.

[0022] The flat plate member 40 fixed in surface contact with the one side surface 11 of the pillar 10 and the side surface 21 of the first beam 20, which are flush with each other, is the first flat plate member 41 of this embodiment. The first flat plate member 41 is a pentagonal plate member formed by cutting out a right-angled isosceles triangle portion from a square steel plate, and has a corner where two long sides intersect at right angles. The first flat plate member 41 is arranged with one of its two long sides aligned along the upper edge of the side surface 21 of the first beam 20 and the other long side aligned along the edge of one side surface 11 of the column 10, and is fixed to the column 10 and the first beam 20 with a plurality of bolts B in surface contact with the one side surface 11 of the column 10 and the side surface 21 of the first beam 20. The edge of one long side of the first flat plate member 41 abuts against the underside of the second beam 30. In this embodiment, eight bolts B are fastened to the column 10 side and eight bolts B are fastened to the first beam 20 side, but the number of bolts B is determined by structural calculations, and the number and arrangement are not limited to those shown in the illustration. Also, when screws are used instead of bolts, the number and arrangement of the screws are determined by structural calculations. As shown in FIG. 2, the first flat plate member 41 is provided with a plurality of small holes H in advance in accordance with the fastening positions of the bolts B. Here, as shown in FIG. 4(a), a first flat plate member 41 is formed by cutting out an isosceles right triangle with two perpendicular sides of 425 mm from a square steel plate with one side of 570 mm.

[0023] The flat plate member 40 fixed in surface contact with the other side surface 12 of the column 10 and the side surface 31 of the second beam 30, which are flush with each other, is the second flat plate member 42 of this embodiment. This second flat plate member 42 is a plate-like member in which a right-angled isosceles triangle portion is cut out from one diagonal corner of a square steel plate, and a rectangular portion is cut out from the other diagonal corner to form a rectangular cutout portion 42a, with the two long sides arranged perpendicular to each other across the cutout portion 42a. The second flat plate member 42 is arranged with one of its two long sides aligned along the upper edge of the side surface 31 of the second beam 30 and the other long side aligned along the edge of the other side surface 12 of the column 10, and is in surface contact with the other side surface 12 of the column 10 and the side surface 31 of the second beam 30, and is fixed to the column 10 and the second beam 30 with a plurality of bolts B. The edge of the cutout 42a abuts against the side surface 21 and the underside of the first beam 20. In this embodiment, eight bolts B are fastened to the column 10 side and eight bolts B are fastened to the second beam 30 side, but the number of bolts B is determined by structural calculations, and the number and arrangement are not limited to those shown in the illustration. Also, when screws are used instead of bolts, the number and arrangement of the screws are determined by structural calculations. As shown in FIG. 2, the second flat plate member 42 is provided with a plurality of small holes H in advance in accordance with the fastening positions of the bolts B. Here, as shown in Figure 4(b), a second flat plate member 42 having a cutout portion is formed by cutting out a square steel plate with one side measuring 720 mm into an isosceles right triangle with two perpendicular sides of 575 mm, and also by cutting out a rectangle measuring 145 mm x 290 mm.

[0024] Next, a procedure for constructing the beam-column joint structure 1 of this embodiment will be described. Below are examples of two typical construction procedures (first construction method and second construction method).

[0025] (First construction method) First, the first construction method will be described. 5(a) and 5(b), four flat plate members (two first flat plate members 41 and two second flat plate members 42 in this example) are fixed to the upper end side of the pillar 10 with bolts B in a roughly four-legged arrangement (propeller-shaped arrangement, swastika-shaped arrangement) when viewed from above. Here, the short edge of the cutout portion 42a of the second flat plate member 42 is arranged along the edge of the upper end of the pillar 10. In addition, the procedure may be to fix the four flat plate members 41, 42 to the pillar 10 and then erect the pillar 10, or to erect the pillar 10 at a predetermined location and then fix the four flat plate members 41, 42 to the pillar 10. The pillars 10 are also set up in a row with a predetermined distance between them, with a plurality of pillars 10 arranged in an array.

[0026] 5(c), the first beam 20 is placed between a pair of first flat plate members 41 fixed to one of the paired side surfaces 11 of the column 10, and the first beam 20 is erected perpendicular to the upper end of the column 10. At this time, the pair of first flat plate members 41 act as a guide when erecting the first beam 20, so that the position of the first beam 20 can be easily adjusted. The first beam 20 is also installed on the adjacent pillar 10 in the same manner. 5(c), the second beam 30 is placed between a pair of second flat plate members 42 fixed to the other pair of side surfaces 12 of the pillar 10, and the second beam 30 is erected perpendicular to the first beam 20. At this time, the pair of second flat plate members 42 act as guides when erecting the second beam 30, making it easy to adjust the position of the second beam 30. The second beam 30 is similarly erected on the first beam 20 erected on the adjacent pillar 10.

[0027] Next, as shown in FIG. 5(d), the first beam 20 is fixed with bolts B to a set of first flat plate members 41 fixed to one side surface 11 of the pillar 10. 5(d), the second beam 30 is fixed with bolts B to a set of second flat plate members 42 fixed to the other side surface 12 of the pillar 10.

[0028] As described above, it is of course possible to first erect the first beam 20 and the second beam 30 together and then fix each of them to the first flat plate member 41 and the second flat plate member 42 with bolts B, but it is also possible to first fix the first beam 20 erected between a set of first flat plate members 41 with bolts B, and then fix the second beam 30 erected between a set of second flat plate members 42 with bolts B.

[0029] The beam-column joint structure 1 can be constructed using this procedure. According to the procedure of this first construction method, when erecting the first beam 20 perpendicular to the upper end of the column 10, a set of first flat plate members 41 serves as a guide when erecting the first beam 20, making it easy to adjust the position of the first beam 20. Similarly, when erecting the second beam 30 perpendicular to the first beam 20, a set of second flat plate members 42 serves as a guide when erecting the second beam 30, making it easy to adjust the position of the second beam 30.

[0030] (Second construction method) Next, the second construction method will be described. As shown in Figure 6(a), a first beam 20 is perpendicular to the upper end of an erected pillar 10, and is erected in an arrangement in which one side surface 11 of the pillar 10 and a pair of side surfaces 21 of the first beam 20 are flush with each other. Next, as shown in Figure 6(a), a second beam 30 is placed perpendicular to the first beam 20 installed at the upper end of the column 10, and is installed so that the other pair of side surfaces 12 of the column 10 and a pair of side surfaces 31 of the second beam 30 are flush with each other across the first beam 20. It is assumed that the pillars 10 are erected in a manner in which a plurality of pillars 10 are arranged in a row at predetermined intervals.

[0031] Next, as shown in Figures 6(b) and (c), a set of first flat plate members 41 are fixed with bolts B in face contact with one side surface 11 of the column 10 and the side surface 21 of the first beam 20, which are flush with each other. Also, as shown in Figures 6(b) and (c), a set of second flat plate members 42 are fixed with bolts B in face contact with the other side surface 12 of the column 10, which is flush with the side surface 31 of the second beam 30. The set of first flat plate members 41 and the set of second flat plate members 42 are similarly fixed to the multiple columns 10 and the first beams 20 and second beams 30 erected on the columns 10.

[0032] Even with this procedure, the beam-column joint structure 1 can be constructed. The second construction method may be as follows:

[0033] For example, after erecting a first beam 20 perpendicular to the upper end of an upright column 10, a set of first flat plate members 41 are fixed with bolts B in face contact with one side surface 11 of the column 10 and a side surface 21 of the first beam 20, which are flush with each other. Next, a second beam 30 is erected perpendicularly on top of the first beam 20 erected at the upper end of the column 10, and then a set of second flat plate members 42 are fixed with bolts B so that they are in surface contact with the other side surface 12 of the column 10, which is flush with the side surface 31 of the second beam 30. This procedure also allows the construction of a beam-column joint structure 1.

[0034] In addition, after erecting a first beam 20 perpendicular to the upper end of the erected column 10, a set of first flat plate members 41 are fixed with bolts B by bringing them into surface contact with one side surface 11 of the column 10 and a side surface 21 of the first beam 20, which are flush with each other. Next, a set of second flat plate members 42 are fixed to the other side surface 12 of the pillar 10 with bolts B. Next, the second beam 30 is disposed between the pair of second flat plate members 42 and erected so that the second beam 30 is perpendicular to the first beam 20 . Next, the second beam 30 is fixed with bolts B to a set of second flat plate members 42 fixed to the other side surface 12 of the column 10 . This procedure also allows the construction of a beam-column joint structure 1.

[0035] As described above, the column-beam joint structure 1 of this embodiment does not require welding and can be constructed by fixing the first flat plate member 41 and the second flat plate member 42 to the column 10, the first beam 20, and the second beam 30 with bolts B. Such a beam-column joint structure 1 can be constructed relatively easily. In particular, in this column-beam joint structure 1, four flat plate members 40 (here, two first flat plate members 41 and two second flat plate members 42) arranged in a roughly four-legged cross shape when viewed from above on the upper end side of the column 10 secure the column 10 to the first beam 20 and the second beam 30, making it less likely to become eccentric even when subjected to large vibrations such as those caused by an earthquake, and making it less likely for twisting to occur in the column 10. The four flat plate members 40 arranged and fixed in this manner in a roughly four-way cross-section when viewed from above can withstand large stresses, making the beam-column joint structure 1 equipped with the four flat plate members 40 less susceptible to problems such as damage. Furthermore, in this column-beam joint structure 1, the first beam 20 and the second beam 30 form a through beam (through beam) structure at the upper end of the column 10, which is preferable because it stabilizes the strength at the point where the first beam 20 and the second beam 30 intersect, improving the bearing capacity of the column-beam joint structure 1.

[0036] (Other construction methods) In the first and second construction methods described above, a column-beam joint structure 1 was constructed using one set of first flat plate members 41 and one set of second flat plate members 42, but it is also possible to construct a column-beam joint structure 1 using two sets of second flat plate members 42.

[0037] 7(a)(b), for example, four second flat plate members 42 (two sets of second flat plate members 42) are fixed to the upper end side of the pillar 10 with bolts B in a roughly four-legged arrangement (propeller-shaped arrangement, swastika-shaped arrangement) when viewed from above. Here, the short edges of the cutout portions 42a of the second flat plate members 42 are arranged along the edge of the upper end of the pillar 10. Next, as shown in Figure 7(c), a first beam 20 is placed between a pair of second flat plate members 42 fixed to one of the paired side surfaces 11 of the column 10, and the first beam 20 is erected perpendicular to the upper end of the column 10. Next, as shown in Figure 7(c), a second beam 30 is placed between a pair of second flat plate members 42 fixed to the other pair of side surfaces 12 of the column 10, and the second beam 30 is erected perpendicular to the first beam 20. Next, as shown in Fig. 7(c), the first beam 20 is fixed with bolts B to a set of second flat plate members 42 fixed to one side surface 11 of the column 10. Also, as shown in Fig. 7(c), the second beam 30 is fixed with bolts B to a set of second flat plate members 42 fixed to the other side surface 12 of the column 10. By this procedure, the beam-column joint structure 1 shown in FIG. 7(c) can be constructed. Here, the column-beam joint structure 1 shown in Figure 7(c) was constructed using a procedure similar to the first construction method described above, but the column-beam joint structure 1 shown in Figure 7(c) may also be constructed using a procedure similar to the second construction method described above.

[0038] If the beam-column connection structure 1 is constructed using four second flat plate members 42 in this way, the first flat plate member 41 becomes unnecessary, and the number of parts can be reduced. In the case of a column-beam joint structure 1 constructed using four second flat plate members 42, as shown in Figure 7(c), the upper part of the second flat plate member 42 will protrude above the first beam 20, but this portion of the upper part of the second flat plate member 42 protruding above the first beam 20 does not interfere with the use of the column-beam joint structure 1, so this is not a problem.

[0039] The present invention is not limited to the above embodiment. For example, as shown in FIGS. 8(a) and 8(b), a reinforcing member 50 may be attached to a flat plate member 40 (a first flat plate member 41, a second flat plate member 42) in a beam-column joint structure 1. The reinforcing member 50 is a plate-like member made of steel plate, and is fixed to one surface of the first flat plate member 41 and the second flat plate member 42 by, for example, welding. The reinforcing member 50 has the function of reinforcing the flat plate member 40 . In this embodiment, a reinforcing member 50 having an approximately trapezoidal shape is fixed to the first flat plate member 41 and the second flat plate member 42, but the shape and size of the reinforcing member 50 are arbitrary, and the shape and size of the reinforcing member 50 may be determined by structural calculations, etc.

[0040] In this way, by attaching reinforcing members 50 to the flat plate members 40 (first flat plate member 41, second flat plate member 42) and reinforcing the flat plate members 40, it becomes possible to withstand greater stress, thereby improving the strength and yield strength of the column-beam joint structure 1. For example, it is not limited to attaching a reinforcing member 50 to a flat plate member 40 in advance and constructing a column-beam connection structure 1 using the flat plate member 40 to which the reinforcing member 50 has been attached, but it is also possible to later fix the reinforcing member 50 to the flat plate member 40 assembled to the column-beam connection structure 1 in order to improve the strength and bearing capacity of the constructed column-beam connection structure 1.

[0041] Furthermore, the reinforcement of the flat plate member 40 is not limited to the addition of the reinforcing member 50 . For example, the flat plate member 40 may be provided with a reinforcing portion having projections and depressions formed by beading or embossing.

[0042] In the above embodiment, the first flat plate member 41 and the second flat plate member 42 shown in Figures 4(a) and (b) are fixed to the column 10 and the first beam 20 and the second beam 30 erected on the column 10 to construct the column-beam joint structure 1, but the shape of the flat plate member 40 (first flat plate member 41, second flat plate member 42) is not limited to this, and flat plate members of other shapes may also be used.

[0043] Furthermore, it goes without saying that other specific detailed structures and the like can be modified as appropriate. [Explanation of symbols]

[0044] 1 Column-beam joint structure 10 pillars 11 One Side 12 Other Aspects 20 First Beam 21 Side 30 Second Beam 31 Side 40 Flat Plate Members 41 First flat plate member 42 Second flat plate member 42a Notch 50 Reinforcement member B Bolt H small hole

Claims

1. A column that is erected in a vertical direction and has two pairs of side surfaces that are arranged opposite each other to form a pair, the paired side surfaces being parallel to each other and the non-paired side surfaces being perpendicular to each other; A first beam perpendicular to the pillar and installed on an upper end of the pillar; A second beam that is perpendicular to the first beam and is installed on the first beam and perpendicular to the column; Equipped with A pair of flat plate members are configured so that one side surface of the column that is disposed opposite to the other and forms a pair of sides of the first beam is flush with the pair of sides of the first beam, and the pair of flat plate members are fixed in surface contact with the one side surface of the column and the side surface of the first beam that are flush with each other; The other side of the column that is disposed opposite to the other side of the column and the pair of side surfaces of the second beam are configured to be flush with each other with the first beam in between, and a pair of flat plate members are fixed in surface contact with the other side of the column and the side of the second beam that are flush with each other; It has A column-beam joint structure characterized in that the two sets of four flat plate members are arranged in a roughly four-cornered shape on the columns when viewed from above.

2. 2. The beam-column joint structure according to claim 1, wherein a reinforcing member is attached to the flat plate member.

3. A method for constructing the column-beam joint structure according to claim 1 or 2, comprising the steps of: Fixing the four flat plate members to the upper end sides of the columns in a generally four-cornered configuration when viewed from above; a step of disposing the first beam between the pair of flat plate members fixed to the pair of side surfaces of the pillar and erecting the first beam perpendicular to an upper end of the pillar; a step of disposing the second beam between the pair of flat plate members fixed to the other side surface of the pillar and erecting the second beam perpendicular to the first beam; fixing the first beam to the set of flat plate members fixed to the one side surface; fixing the second beam to the set of flat plate members fixed to the other side surface; A construction method for a column-beam joint structure, comprising the steps of:

4. A method for constructing the column-beam joint structure according to claim 1 or 2, comprising the steps of: a step of orthogonally connecting the first beam to an upper end of the column so that the pair of side surfaces of the column and the pair of side surfaces of the first beam are flush with each other; a step of orthogonally placing the second beam on the first beam and erecting the second beam so that the other side surface of the column and the pair of side surfaces of the second beam are flush with each other across the first beam; a step of fixing the set of flat plate members in surface contact with the one side surface of the column and the side surface of the first beam, the one side surface being flush with the other; a step of fixing the set of flat plate members in surface contact with the other side surface of the column and a side surface of the second beam, which are flush with each other; A construction method for a column-beam joint structure, comprising the steps of:

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