Column-beam connection structure and construction method thereof

Abstract

To construct a connection structure by connecting columns and beams, which improves work efficiency on-site when precast members are used, and has the same bearing capacity as conventional ones.SOLUTION: In a construction method of the connecting structure of column and beam, a pair of beam members facing each other in a plurality of the beam members are arranged so that beam main reinforcements protruding from the end sides of the beam members and extending in opposite directions to each other are located on the upper surface of the column members, and after connecting one beam reinforcement and the other beam reinforcement of the pair of opposed beam members by a reinforcement joint, a cage reinforcement formed in a cage shape by combining the plurality of reinforcements is lowered onto the upper surface of the column member from above, and the part of reinforcements constituting the cage reinforcement is connected to a column main reinforcement whose whole length or a part is buried in the column member by the reinforcement joint, and the cage reinforcement and the beam main reinforcement projected from the end side face of the beam member and connected to each other are integrated by placing cast-in-place concrete in a state where the beam main reinforcement is included in the cage reinforcement.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] In the construction of concrete composite structures and buildings with reinforcing bars, such as reinforced concrete structures, it is known to connect columns and beams to construct a connection structure, for example, on the top floor. In this case, sufficient strength is obtained at the connection part (connection structure) between the column member and the beam member by fixing and connecting the reinforcing bars protruding from the inside of each member within the connection structure. For example, at the intersection where the main reinforcing bars of the beam member and the main reinforcing bars of the column member are bent and fixed, multiple reinforcing bars are intertwined to ensure shear strength, etc.

[0003] Moreover, in recent years, from the standpoint of ease of construction and shortening construction time, a technique has become common in the construction of reinforced concrete structures, in which components prefabricated in factories or elsewhere are transported to the site and assembled to existing components, known as precast concrete components (also simply called precast components), which are then combined with cast-in-place concrete.

[0004] For example, Patent Document 1 discloses a joint structure in which the column-beam joints of reinforced concrete structures have a reinforcement configuration in which the column main reinforcement and the beam main reinforcement are restrained by corner reinforcement bars, making it easy to construct while still providing sufficient strength. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2008-240329 A Summary of the Invention [Problem to be solved by the invention]

[0006] In the above-mentioned Patent Document 1, straight column and beam reinforcements and L-shaped corner reinforcements are used for reinforcement, ensuring ease of construction and strength. However, in the Patent Document 1, various reinforcing bars such as column reinforcements, beam reinforcements, corner reinforcements, and U-shaped reinforcements are intertwined in the column-beam joints, which may complicate on-site work.

[0007] In addition, when constructing concrete composite structures or buildings, it is known to combine precast members with cast-in-place concrete to improve workability and shorten construction time, but when using precast members to improve work efficiency, there are cases where the precast members are hung from above the structure on-site to proceed with work. In such cases, in places where many rebars are intertwined, such as column-beam joints, it is desirable to prevent interference between the rebars and to improve workability.

[0008] In view of the above circumstances, an object of the present invention is to provide a column-beam connection structure and a construction method thereof that improves work efficiency on-site when using precast members to connect columns and beams to construct a connection structure, and that makes it possible to construct a connection structure having the same strength as conventional connection structures. [Means for solving the problem]

[0009] In order to achieve the above object, according to the present invention, At the top of the building, A method for constructing a column-beam connection structure in which a column member made of reinforced concrete is connected to a plurality of beam members which are connected to each other on their top surfaces, the method comprising: arranging a pair of opposing beam members among the plurality of beam members such that the beam main reinforcements protruding from the end side surfaces of the beam members and extending in opposing directions are positioned on the top surface of the column member; connecting one beam reinforcement bar of the pair of opposing beam members to the other beam reinforcement bar of the pair of opposing beam members with a reinforcing bar joint; and then, The ceiling is made of vertically extending reinforcing bars bent into an L shape, and is surrounded by tie bars. A cage-shaped reinforcing bar is lowered onto the upper surface of the column member from above to form the cage reinforcing bar. The lower end of the reinforcing bar extending in the vertical directionthe cage reinforcing bars and the beam main bars protruding from the end side of the beam member and connected to each other are integrated by pouring in-situ concrete with the beam main bars enclosed in the cage reinforcing bars.

[0010] The reinforcing bar joint that connects the column main reinforcement and a part of the reinforcing bar that constitutes the cage reinforcement may be a sleeve joint embedded in the column member.

[0011] The reinforcing bar joint connecting the column main reinforcement and the cage reinforcing bar may be a sleeve joint connecting the upper end of the column main reinforcement protruding from the top surface of the column member and a part of the reinforcing bar that constitutes the cage reinforcing bar.

[0012] According to another aspect of the present invention, At the top of the building, A column-beam connection structure in which a column member made of reinforced concrete and a plurality of beam members connected to each other on the upper surface of the column member are connected, The ceiling is made of several vertically extending reinforcing bars bent into an L shape, and the surrounding area is surrounded by hoops to form a cage-like shape. The present invention provides a method for constructing a structure comprising: a cage-shaped cage reinforcing bar; a beam main reinforcing bar protruding from the end side surface of the beam member and extending toward the inside of the cage reinforcing bar; and a column main reinforcing bar whose entire length or part is embedded in the column member; and the cage reinforcing bar. The lower end of the reinforcing bar extending in the vertical direction The present invention provides a column-beam connection structure, characterized in that the cage reinforcing bars and the main beam reinforcement bars are connected by reinforcing bar joints, and the cage reinforcing bars and the main beam reinforcement bars are contained by pouring in-situ concrete.

[0013] The multiple beam members may consist of at least a pair of beam members facing each other on the upper surface of the column member, and the main beam reinforcement bars protruding from the end side surfaces of the pair of beam members facing each other may be connected to each other by reinforcing bar joints inside the cage reinforcement bar.

[0014] The reinforcing bar joint that connects the column main reinforcement and a part of the reinforcing bar that constitutes the cage reinforcement may be a sleeve joint embedded in the column member.

[0015] The reinforcing bar joint connecting the column main reinforcement and the cage reinforcing bar may be a sleeve joint connecting the upper end of the column main reinforcement protruding from the top surface of the column member and a part of the reinforcing bar that constitutes the cage reinforcing bar. Effect of the Invention

[0016] According to the present invention, when connecting columns and beams to construct a connection structure, it is possible to improve work efficiency on site when using precast members and to construct a connection structure having the same strength as conventional connection structures. [Brief description of the drawings]

[0017] [Figure 1] FIG. 2 is a schematic explanatory diagram of a structure including a connection structure. [Diagram 2] FIG. 2 is a schematic diagram of a cage reinforcing bar. [Diagram 3] FIG. 2 is a schematic explanatory diagram of a connection structure. [Figure 4] 1A to 1C are schematic explanatory diagrams showing a method for constructing a connection structure. [Diagram 5] 1A to 1C are schematic explanatory diagrams showing a method for constructing a connection structure. [Figure 6] 1A to 1C are schematic explanatory diagrams showing a method for constructing a connection structure. [Figure 7] 1A to 1C are schematic explanatory diagrams showing a method for constructing a connection structure. [Figure 8] FIG. 4 is a schematic explanatory diagram of a connection structure according to a first modified example of the present invention. [Figure 9] FIG. 11 is a schematic explanatory diagram showing a method for constructing a connection structure according to a first modified example. [Figure 10] FIG. 11 is a schematic explanatory diagram showing a method for constructing a connection structure according to a first modified example. [Figure 11] FIG. 11 is a schematic explanatory diagram showing a method for constructing a connection structure according to a first modified example. [Figure 12] FIG. 11 is a schematic explanatory diagram showing a method for constructing a connection structure according to a first modified example. [Figure 13] FIG. 11 is a schematic explanatory diagram of a connection structure according to a second modified example of the present invention. [Figure 14]FIG. 11 is a schematic explanatory diagram showing a method for constructing a connection structure according to a second modified example. [Figure 15] FIG. 11 is a schematic explanatory diagram showing a method for constructing a connection structure according to a second modified example. [Figure 16] FIG. 11 is a schematic explanatory diagram showing a method for constructing a connection structure according to a second modified example. [Figure 17] FIG. 11 is a schematic explanatory diagram showing a method for constructing a connection structure according to a second modified example. [Figure 18] FIG. 13 is a schematic explanatory diagram of a connection structure according to a third modified example of the present invention. [Figure 19] FIG. 13 is a schematic explanatory diagram showing a method for constructing a connection structure according to a third modified example. [Figure 20] FIG. 13 is a schematic explanatory diagram showing a method for constructing a connection structure according to a third modified example. [Figure 21] FIG. 13 is a schematic explanatory diagram showing a method for constructing a connection structure according to a third modified example. [Figure 22] FIG. 13 is a schematic explanatory diagram showing a method for constructing a connection structure according to a third modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this specification and the drawings, components having substantially the same functional configuration may be given the same reference numerals to avoid repetitive explanation. In addition, in this specification, for the purpose of explanation, some illustrations of the reinforcement structure and reinforcement arrangement may be omitted, or reinforcement inside a member that is not normally visible may be illustrated.

[0019] (Column-beam connection structure according to an embodiment of the present invention) Fig. 1 is a schematic explanatory diagram of a structure 10 including a connection structure 1 according to an embodiment of the present invention, and is a top view of the structure 10. As shown in Fig. 1, the structure 10 includes a plurality of column members 20 (here, 9 positions arranged in a 3 x 3 pattern at equal intervals in a plan view) and a plurality of beam members 30 (here, 12 beam members) provided to connect the column members 20 together. A group of reinforcing bars 31 is provided on the top surface of the beam members 30 to reinforce the shear strength when concrete is poured.

[0020] Also, as shown by the dashed line in the figure, when a beam member 30 is provided to connect column members 20 to each other, a plurality of beam members 30 are connected on the upper surface of the column member 20 to form the connection structure 1. Reinforcing bars (column main reinforcement bars 22 described later) not shown are arranged inside the column member 20, and the column main reinforcement bars 22 may be arranged to protrude upward from the upper surface of the column member 20. Reinforcing bars (beam main reinforcement bars 32 described later) not shown are arranged inside the beam member 30, and the beam main reinforcement bars 32 may be arranged to protrude from the end side of the beam member 30. That is, in the structure 10, the column main reinforcement bars 22 protruding upward on the upper surface of the column member 20 and the beam main reinforcement bars 32 protruding from the end side of the beam member 30 toward the connection structure 1 are included in the connection structure 1. The connection structure 1 is constructed by pouring cast-in-place concrete in such a reinforcement arrangement state. The detailed configuration of the reinforcing bar in the connection structure 1 will be described later with reference to FIG.

[0021] In the connection structure 1 according to the present embodiment, a cage reinforcing bar 40 is provided on the upper surface of the column member 20. FIG. 2 is a schematic explanatory diagram of the cage reinforcing bar 40. The cage reinforcing bar 40 has a so-called cage shape, and is composed of a plurality of L-shaped reinforcing bars 42 formed by bending reinforcing bars at about 90 degrees into an approximately L-shape, and a plurality of tie bars 44 surrounding the periphery so as to bundle the plurality of L-shaped reinforcing bars 42. For example, the cage reinforcing bar 40 has a substantially square shape in a plan view. In this case, the L-shaped reinforcing bars 42 are a group of reinforcing bars that bend toward the inside of the square shape in a plan view, and may be arranged so that the plurality of L-shaped reinforcing bars 42 bend toward the inside from the four sides of the square shape as shown in the figure, forming a so-called cage shape. The tie bars 44 are hoop-shaped reinforcing bars that surround the four sides of the square shape, and may be provided in multiple numbers in the height direction. These L-shaped reinforcing bars 42 and tie bars 44 are integrated by means of welding or bundling, etc., to form the cage reinforcing bar 40 as shown in the figure. The cage reinforcing bars 40 may be manufactured in advance as an integrated unit in a factory, etc. In manufacturing the cage reinforcing bars 40, the number, shapes, arrangement, etc. of the L-shaped reinforcing bars 42 and the tie bars 44 are optional and are not limited to the form shown in the figure.

[0022] 3 is a schematic explanatory diagram of the connection structure 1 according to this embodiment, and is an enlarged longitudinal sectional view of the connection structure 1. As shown in Fig. 3, a column member 20 is provided with a plurality of column main reinforcements 22 extending in the vertical direction (longitudinal direction in the figure) and column distribution reinforcements 24 perpendicular to the column main reinforcements 22. The upper ends of the column main reinforcements 22 protrude upward from the upper surface of the column member 20.

[0023] Additionally, the beam member 30 is provided with a plurality of beam main reinforcements 32 extending in the horizontal direction (horizontal direction in the drawing). The beam main reinforcements 32 protrude from the end side surface of the beam member 30 toward the inside of the cage reinforcing bar 40 (the center of the connection structure 1), and the beam main reinforcements 32, 32 protruding from a pair of beam members 30, 30 facing each other are connected to each other by reinforcing bar joints 35 as shown in the drawing.

[0024] In the connection structure 1, a cage reinforcing bar 40 is disposed above the column member 20. The lower end portions 42a of the L-shaped reinforcing bars 42 of the cage reinforcing bars 40 are configured so that the upper end portions 22a of the column main reinforcements 22 protruding upward from the upper surface of the column member 20 butt against each other, and these end portions are connected to each other by a reinforcing bar joint 45. For example, if the reinforcing bar joint 45 is a sleeve-type joint, a sleeve member may be attached to the lower end portions 42a of the L-shaped reinforcing bars 42 in advance.

[0025] The structure of the reinforcing bar joint 35 and the reinforcing bar joint 45 is arbitrary, and may be, for example, a sleeve type joint, a coupler type joint, a bolt-nut type joint, or any other joint of various structures.

[0026] (Method of constructing a connection structure) 4 to 7 are schematic explanatory diagrams showing a method for constructing the connection structure 1 according to this embodiment. First, as shown in Fig. 4, a column member 20 is prepared with the column main reinforcements 22 protruding from its upper surface, and a joint sleeve 50 is placed on the upper end 22a. The number and arrangement of the column main reinforcements 22 are arbitrary and vary depending on the design, but here, the column main reinforcements 22 are provided at predetermined intervals along the four sides of the column member 20, which is approximately square in plan view. The column member 20 may be prepared as a cast-in-place concrete member at the construction site, or may be a precast member manufactured in advance in a factory or the like.

[0027] Next, as shown in Fig. 5, four (two pairs) beam members 30 are arranged on all four sides around the column member 20, with each pair facing each other. Then, the beam main reinforcements 32, 32 protruding from each pair of beam members 30, 30 facing each other are connected to each other by reinforcing bar joints 35. The beam members 30 are precast members fabricated in advance in a factory or the like, and are designed in advance so that the column main reinforcements 22 and the beam main reinforcements 32 do not interfere with each other during construction.

[0028] 6, the cage reinforcing bars 40 are hung down from above the column member 20. At this time, the L-shaped reinforcing bars 42 of the cage reinforcing bars 40 are designed in advance so that their lower ends 42a are housed in their respective sleeves 50. In other words, the upper ends 22a of the column main reinforcements 22 and the lower ends 42a of the L-shaped reinforcing bars 42 of the cage reinforcing bars 40 are designed in advance so that their numbers and arrangements correspond to each other.

[0029] 7, the cage reinforcing bars 40 suspended from above the column member 20 are lowered. As a result, the lower ends 42a of the L-shaped reinforcing bars 42 are housed in the respective sleeves 50 and are connected to the upper ends 22a of the column main reinforcing bars 22 by reinforcing bar joints 45 using the sleeves 50. That is, the column member 20 and the cage reinforcing bars 40 are connected via the reinforcing bar joints 45. In this state, cast-in-place concrete (not shown) is poured to enclose the beam main reinforcing bars 32 and the cage reinforcing bars 40, integrating them and constructing the connection structure 1.

[0030] (Action and effect) According to the connection structure 1 and its construction method of this embodiment, the beam members 30, 30 arranged facing each other above the column member 20 are connected to each other with reinforcing bar joints 35, and then the cage reinforcing bar 40, which has been manufactured in advance as a single unit, is hung from above and connected to the column member 20 with reinforcing bar joints 45. As a result, when arranging the beam member 30, which is a precast member, around the column member 20, there is no need to worry about unnecessarily entangling the reinforcing bars, and problems such as interference between the reinforcing bars do not occur, improving work efficiency and productivity on site.

[0031] Furthermore, by using precast members for the beam members 30 and manufacturing the cage reinforcing bars 40 as an integrated unit in advance at a factory or the like, workability at the site is improved and construction time is shortened. In addition, since the reinforcing bar configuration of the cage reinforcing bars 40 is appropriately designed according to the design of the connection structure 1 and the structure 10 that will ultimately be constructed, it is possible to configure the reinforcing bars to ensure strength equal to or greater than that of the past. In other words, it is possible to achieve both efficient workability and sufficient strength with a simple configuration.

[0032] Although an example of an embodiment of the present invention has been described above, the present invention is not limited to the illustrated embodiment. It is clear that a person skilled in the art can conceive of various modified or amended examples within the scope of the ideas described in the claims, and it is understood that these naturally fall within the technical scope of the present invention. Therefore, modified examples of the present invention will be described below. In the following modified examples, components having the same functional configuration as the above embodiment are illustrated with the same reference numerals, and their description will be omitted.

[0033] (First Modification of the Invention) In the above embodiment, when the column member 20 and the cage reinforcing bar 40 are connected via the reinforcing bar joint 45, a configuration in which the reinforcing bar joint 45 is located above the upper surface of the column member 20 has been illustrated and described, but the configuration of the present invention is not limited to this. Fig. 8 is a schematic explanatory diagram of a connection structure 1a according to a first modified example of the present invention, and is a vertical sectional view showing an enlarged view of the connection structure 1a. Figs. 9 to 12 are schematic explanatory diagrams showing a method of constructing the connection structure 1a according to the first modified example.

[0034] As shown in Fig. 8, in the connection structure 1a according to this modification, the sleeve joint 60 is embedded from the top surface of the column member 20 toward the inside. Accordingly, the upper ends of the column main reinforcements 22 provided in the column member 20 do not protrude from the top surface of the column member 20, but are embedded inside the member. Also, the length of the L-shaped reinforcement bars 42 of the cage reinforcement bars 40 is designed to be longer than that of the above embodiment.

[0035] As shown in Figures 9 to 12, the connection structure 1a according to this modified example is basically constructed by the construction method described in the above embodiment. However, the column main reinforcement 22 and the L-shaped reinforcing bar 42 are connected by a sleeve joint 60 embedded inside the column member 20. With this configuration, it is possible to prevent the reinforcing bars from becoming entangled near the top surface of the column member 20, and workability is further improved.

[0036] (Second Modification of the Invention) 13 is a schematic diagram of a connection structure 1b according to a second modified example of the present invention, where (a) is an enlarged longitudinal sectional view of the connection structure 1b, and (b) is a cross section taken along line AA in (a). Also, Figs. 14 to 17 are schematic diagrams showing a method of constructing the connection structure 1b according to the second modified example.

[0037] As shown in Fig. 13, in the connection structure 1b according to this modification, a through hole 70 having a depth L1 from the upper surface of the column member 20 is formed in a predetermined design. Moreover, the upper end of the column main reinforcement 22 provided in the column member 20 is not configured to protrude from the upper surface of the column member 20, but is embedded below the through hole 70. Moreover, a sleeve joint 75 is embedded in advance in the vicinity of the lower end of the through hole 70 (i.e., in the vicinity of the upper end of the column main reinforcement 22). Moreover, compared to the above embodiment and the first modification, the length of the L-shaped reinforcement 42 of the cage reinforcement 40 is designed to be longer, and the vertical length of the L-shaped reinforcement 42 is designed to be longer than the depth L1 of the through hole 70.

[0038] The connection structure 1b according to this modified example is basically constructed by the construction method described in the above embodiment, as shown in Figures 14 to 17. However, the column main reinforcement 22 and the L-shaped reinforcement 42 are connected by a sleeve joint 75 embedded inside the column member 20 after the L-shaped reinforcement 42 is inserted into the through hole 70 to a predetermined depth when the cage reinforcement 40 is hung from above the column member 20 and lowered.

[0039] In the construction of concrete composite structures or buildings having a structure in which columns and beams are connected, it may be desirable to locate the connection portion between the reinforcing bars as far away as possible from the connection portion between the column and the beam in order to improve earthquake resistance and strength. In the configuration according to this modification, the sleeve joint 75 is embedded at a position spaced a depth L1 from the top surface of the column member 20. That is, the connection portion between the L-shaped reinforcing bar 42 and the column main reinforcement 22 is located at a position spaced a distance L1 or more from the vicinity of the top surface of the column member 20, which is the connection portion between the column and the beam. This achieves further improvement in earthquake resistance and strength of the connection structure 1b in addition to the effects described in the above embodiment, and realizes improvement in earthquake resistance and strength of the entire structure using the connection structure 1b.

[0040] (Third Modification of the Invention) 18 is a schematic diagram of a connection structure 1c according to a third modified example of the present invention, where (a) is an enlarged longitudinal sectional view of the connection structure 1c, and (b) is a cross section taken along line AA in (a). Also, Figs. 19 to 22 are schematic diagrams showing a method of constructing the connection structure 1b according to the second modified example.

[0041] 18, in the connection structure 1c according to this modified example, a hole 80 having a depth L2 from the top surface of the pillar member 20 is formed in the pillar member 20. The hole 80 has a substantially square shape in a plan view, and the periphery of the hole 80 is thickened compared to a lower part of the pillar member 20 where the hole 80 is not formed, and a thickened part 81 is provided. The thickened part 81 is provided for arranging the beam member 30 when the connection structure 1c is constructed.

[0042] Moreover, the upper ends of the column main reinforcements 22 provided in the column member 20 do not protrude from the upper surface of the column member 20, but are embedded in the inner bottom surface of the hole 80. A sleeve joint 85 is embedded in the bottom surface of the hole 80 in advance. Moreover, compared with the above embodiment and the first modified example, the length of the L-shaped reinforcement bars 42 of the cage reinforcement bars 40 is designed to be longer, and the vertical length of the L-shaped reinforcement bars 42 is designed to be longer than the depth L2 of the hole 80.

[0043] As shown in Figs. 19 to 22, the connection structure 1c according to this modification is basically constructed by the construction method described in the above embodiment. However, the connection between the column main reinforcement 22 and the L-shaped reinforcement 42 is performed by the sleeve joint 85 embedded in the inner bottom surface of the hole 80 after the L-shaped reinforcement 42 is lowered to a predetermined depth of the hole 80 when the cage reinforcement 40 is hung down from above the column member 20. In the configuration according to this modification, the sleeve joint 85 is located at a position separated by a depth L2 from the upper surface of the column member 20 by the configuration using the hole 80. That is, the connection part between the L-shaped reinforcement 42 and the column main reinforcement 22 is located at a position separated by a distance L2 or more from the vicinity of the upper surface of the column member 20, which is the connection part between the column and the beam. As a result, in addition to the action and effect described in the above embodiment, the earthquake resistance and strength of the connection structure 1b are further improved, and the earthquake resistance and strength of the entire structure using the connection structure 1b are improved. [Industrial Applicability]

[0044] The present invention can be applied to a column-beam connection structure and a method for constructing the same. [Explanation of symbols]

[0045] 1. Connection structure 1a to 1c...Connection structures (related to modified examples) 10...Structure 20...Column member 22…Column main reinforcement 24…Column distribution reinforcement 30…Beam member 31...Reinforcing bars 32…Beam main reinforcement 35…Reinforcing bar joint 40…Cage steel bar 42…L-shaped rebar 44…Stitch 45…Reinforcing bar joint 50…Sleeve 60...Sleeve joint 70...Through hole 75...Sleeve joint 80...hole 81…Bank 85...Sleeve joint

Claims

1. A method for constructing a column-beam connection structure in which a column member made of reinforced concrete is connected to a plurality of beam members which are connected to each other on the upper surface of the column member in the top floor of a building, comprising: A pair of opposing beam members among the plurality of beam members are arranged so that the beam main reinforcements protruding from the end side surfaces of the beam members and extending in directions opposing each other are located on the upper surface of the column member, After connecting one beam reinforcing bar of a pair of opposing beam members to the other beam reinforcing bar with a reinforcing bar joint, A ceiling portion is provided which is constructed by bending a plurality of reinforcing bars extending in the vertical direction into an L-shape, and a cage reinforcing bar which is surrounded by hoops and has a cage-like shape is lowered from above onto the upper surface of the column member, and the lower end of the reinforcing bar which constitutes the cage reinforcing bar and extends in the vertical direction is connected to a column main reinforcing bar whose entire length or part is embedded in the column member by a reinforcing bar joint, A method for constructing a column-beam connection structure, characterized in that the cage reinforcing bars and the main beam reinforcing bars protruding from the end side surfaces of the beam member and connected to each other are integrated by pouring in-situ concrete with the main beam reinforcing bars enclosed in the cage reinforcing bars.

2. 2. The method for constructing a column-beam connection structure according to claim 1, wherein a reinforcing bar joint connecting the column main reinforcement and a part of the reinforcing bar constituting the cage reinforcement is a sleeve joint embedded in the column member.

3. 2. The method for constructing a column-beam connection structure according to claim 1, wherein the reinforcing bar joint connecting the column main bars and the cage reinforcing bars is a sleeve joint connecting an upper end of the column main bars protruding from an upper surface of the column member and a part of the reinforcing bars constituting the cage reinforcing bars.

4. A column-beam connection structure in which a column member made of reinforced concrete is connected to a plurality of beam members which are connected to each other on the upper surface of the column member in the top floor of a building, A cage-shaped cage reinforcing bar is located on the upper surface of the column member and has a ceiling portion formed by bending a plurality of reinforcing bars extending in the vertical direction into an L-shape, and is further surrounded by hoops to form a cage-shaped shape; A beam main bar protruding from the end side surface of the beam member and extending toward the inside of the cage reinforcing bar, The column main reinforcement, the entire length or part of which is embedded in the column member, and the lower end of the reinforcing bar that constitutes the cage reinforcing bar and extends in the vertical direction are connected by a reinforcing bar joint, A column-beam connection structure, characterized in that the cage reinforcement and the beam main reinforcement are contained by pouring in-situ concrete.

5. The plurality of beam members each include at least a pair of beam members facing each other on an upper surface of the column member, The column-beam connection structure according to claim 4, characterized in that the main beam reinforcements protruding from the end side surfaces of a pair of beam members facing each other are connected to each other inside the cage reinforcement by a reinforcing bar joint.

6. 6. The column-beam connection structure according to claim 4, wherein a reinforcing bar joint connecting the column main reinforcement and a part of the reinforcing bar constituting the cage reinforcement is a sleeve joint embedded in the column member.

7. 6. The column-beam connection structure according to claim 4 or 5, characterized in that the reinforcing bar joint connecting the column main bars and the cage reinforcing bars is a sleeve joint connecting an upper end of the column main bars protruding from an upper surface of the column member and a part of the reinforcing bars constituting the cage reinforcing bars.

Images