JP2017214720A - Junction structure and junction method between reinforced concrete column and beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a junction structure and a junction method between reinforced concrete column and beam that curtail construction period, enhance productivity, save manpower and furthermore reduce a cost.SOLUTION: A junction structure between reinforced concrete column and beam has a reinforced concrete column member 2 and a reinforced concrete beam member 3 joined to each other, and includes: a plurality of column junction reinforcing bars 4, 4,... protruding upward from a top edge surface of the column member 2; a precast concrete cylindrical member 5 disposed above the column member 2 and having a column concrete hollow part 51 formed inside into which the plurality of column junction reinforcing bars 4, 4, ... may be inserted; a concrete part cast in the column concrete hollow part 51 and a joint part between the cylindrical member 5 and the column member 2; and beam junction members 6, 6 formed integrally with the cylindrical member 5 and having the beam member 3 joined therewith.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a reinforced concrete column beam connection structure and a reinforced concrete column beam connection method.

Conventionally, when constructing super high-rise apartment buildings made of reinforced concrete, for the purpose of shortening the work period, improving productivity, and saving labor, precast concrete column beam connection members are used at the column beam connection portions of the column members and beam members. (See, for example, Patent Documents 1 and 2). Such a beam-column connecting member has a plurality of holes through which the reinforcing bars of the column member are inserted, a gap between the reinforcing bar inserted through the hole and the inner peripheral surface of the hole, and the beam-column connecting member Grout material is filled between the column members.
On the other hand, when building reinforced concrete super high-rise apartments, etc., for the purpose of cost reduction, the conventional method is to place concrete in the field without using precast concrete beam-column joints for beam-beam joints. A column member and a beam member may be joined by a construction method.

JP 2005-139730 A JP 2009-235680 A

  When connecting reinforced concrete column members and beam members, use precast concrete column beam connection members to shorten construction time, improve productivity, and save labor, but at the same cost as conventional methods There is a demand for a reinforced concrete column beam connection structure and a reinforced concrete column beam connection method.

  Accordingly, the present invention has an object to provide a reinforced concrete column beam connection structure and a reinforced concrete column beam connection method capable of shortening the work period, improving productivity, saving labor and reducing costs. And

  In order to achieve the above object, a reinforced concrete column-beam joint structure according to the present invention is a reinforced concrete column-beam joint structure in which a reinforced concrete column member and a beam member are joined to each other above the upper end surface of the column member. A plurality of column-bonding reinforcing bars protruding above, a cylindrical member made of precast concrete in which an empty space for column concrete is formed, which is disposed above the column member and into which the plurality of column-bonding reinforcing bars can be inserted, and the column A concrete empty portion, a concrete portion placed in a joint between the tubular member and the column member, a beam joining member formed integrally with the tubular member and joined to the beam member; It is characterized by having.

  In addition, a reinforced concrete column beam joining method according to the present invention is a reinforced concrete column beam joining method in which a reinforced concrete column member and a beam member are joined, and a tubular member made of precast concrete formed in a tubular shape is used. A cylindrical member installation step that is installed at the upper part of the column member, and inserts a plurality of column joint reinforcing bars protruding upward from the upper end surface of the column member into a column concrete space formed inside the cylindrical member; A concrete placing step for placing concrete in the space for the column concrete and a joint between the cylindrical member and the column member, and a beam joining member formed integrally with the cylindrical member. And a beam member joining step for joining the members.

In the present invention, the cylindrical member made of precast concrete is formed with a hollow part for column concrete into which a plurality of column joint reinforcing bars can be inserted, and a hollow part for column concrete into which a plurality of column joint reinforcing bars are inserted, In addition, the cylindrical member and the column member are joined together by integrally placing the concrete on the joint portion between the cylindrical member and the column member.
On the other hand, a conventional precast concrete column beam joint has a plurality of holes through which a plurality of column joint rebars are inserted, and the inside of the plurality of holes through which the column joint rebars are inserted, respectively. The column beam joint and the column member are joined by filling the joint between the column beam joint and the column member with a grout material.
Thus, in the present invention, instead of filling the grout material in each of the plurality of hole portions, the concrete may be placed in the column concrete empty space of the cylindrical member, and the column concrete empty space, and the cylindrical shape Since concrete can be cast integrally in the joint between the member and the column member, it is possible to shorten the work period, improve productivity, and save labor in joining the column member and the beam member. Reduction can be achieved.

Moreover, in the reinforced concrete column beam connection structure according to the present invention, it is preferable that the beam connection member is formed with a beam concrete empty portion into which concrete is placed integrally with the concrete of the beam member.
With such a configuration, the beam joining member and the beam member can be easily joined. Therefore, in the joining of the column member and the beam member, it is possible to shorten the work period, improve productivity, and save labor. As well as cost reduction.

  ADVANTAGE OF THE INVENTION According to this invention, in joining of a column member and a beam member, a work period can be shortened, productivity improvement and labor saving can be achieved, and cost reduction can be achieved.

It is a front view showing an example of a reinforced concrete column beam connection structure according to an embodiment of the present invention. FIG. 2 is a top view of FIG. 1. It is a perspective view of a beam-column joining member. It is a figure explaining the column beam joining method of a reinforced concrete structure.

Hereinafter, a reinforced concrete column beam connection structure and a reinforced concrete column beam connection method according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.
As shown in FIG. 1 and FIG. 2, the reinforced concrete column beam connection structure according to the present embodiment is a column beam connection portion of a column member 2 and a beam member 3 in a reinforced concrete super high-rise apartment (reinforced concrete column beam connection structure). ) 1. In FIGS. 1 and 2, only the outer shape of the beam member 3 is indicated by a broken line.
In the following, one of the horizontal directions orthogonal to each other is defined as the X direction, and the other as the Y direction.
The column member 2 is formed in a prismatic shape having a substantially rectangular cross section. The column member 2 is disposed such that the outer peripheral surface faces the X direction and the Y direction.

  The column beam joint portion 1 has a plurality of column joint reinforcing bars 4, 4... Which are embedded in the column member 2 on the lower side and protrude upward from the upper end surface 21 of the column member 2, and an empty space 51 for column concrete which opens up and down. A cylindrical member 5 made of precast concrete, which is formed above the column member 2 in a state where the plurality of column joining rebars 4, 4... Are inserted, and the cylindrical member 5. A pair of beam-casting members 6 and 6 made of precast concrete to which the beam member 3 is joined, a tubular member 5, a plurality of beam-joined reinforcing bars 7, 7. And a concrete portion 8 that is integrally cast on the joint portion 52 between the cylindrical member 5 and the column member 2.

The plurality of column joining rebars 4, 4... Are arranged at intervals so as to draw a substantially square in the vicinity of the outer peripheral portion of the column member 2 in plan view.
As shown in FIGS. 1 to 3, the cylindrical member 5 is formed in a rectangular tube shape and is disposed above the column member 2 (see FIGS. 1 and 2) in a direction penetrating in the vertical direction. The outer shape of the cylindrical member 5 is slightly larger than the outer shape of the column member 2 in plan view. In addition, the cylindrical member 5 and the column member 2 are formed in a dimension that the column member 2 cannot be inserted into the column concrete space 51 of the cylindrical member 5.
When the cylindrical member 5 is arranged above the column member 2, the column joining reinforcing bars 4, 4... (See FIGS. 1 and 2) are arranged in the vicinity of the inner peripheral surface of the cylindrical member 5.

The pair of beam joining members 6 and 6 are long members having a substantially U-shaped cross section, and are arranged in an attitude that extends in the X direction and opens upward. The pair of beam joining members 6 and 6 are configured such that concrete is placed therein. A portion where the concrete of the pair of beam joining members 6 and 6 is placed is referred to as a beam concrete empty portion 63.
One first beam joining member 61 of the pair of beam joining members 6, 6 is disposed on one side in the X direction of the tubular member 5, and the other second beam joining member 62 is composed of the tubular member 5. Arranged on the other side in the X direction.

The beam joining rebars 7, 7 ... are first beam joining rebars 71, 71 ... extending in the X direction, and second beam joining rebars 72, 72 ... (see FIGS. 2 and 3) extending in the Y direction. ,have.
The first beam joining rebars 71, 71... Respectively penetrate the tubular member 5 in the X direction, and are disposed inside the tubular member 5, the first beam joining member 61, and the second beam joining member 62. Both end portions in the direction protrude beyond the first beam joining member 61 and the second beam joining member 62 to the outside in the X direction (side away from the tubular member 5).
The second beam joining rebars 72, 72... Are arranged on the column concrete empty space 51 of the cylindrical member 5 on one side in the Y direction, and the other side protrudes from the cylindrical member 5 to the other side in the Y direction. The part which protrudes from the cylindrical member 5 among the 2nd beam joint reinforcement 72,72 ... is comprised so that it may be embed | buried under the concrete of the beam member (not shown) arrange | positioned at the Y direction other side of the cylindrical member 5. Has been.

The cylindrical member 5, the first beam joining member 61, the second beam joining member 62, the first beam joining rebars 71, 71... And the second beam joining rebars 72, 72. It has been carried to the site. The cylindrical member 5, the first beam joint member 61, the second beam joint member 62, the first beam joint reinforcing bars 71, 71... And the second beam joint reinforcing bars 72, 72. Nine.
The first beam joining rebars 71, 71..., The second beam joining rebars 72, 72... And the column joining rebars 4, 4,... Do not interfere with each other when the column beam joining member 9 is disposed on the column member 2. Is arranged.

Returning to FIG. 1, the portion of the concrete portion 8 that is filled in the hollow portion 51 for the column concrete of the tubular member 5 is defined as an internal concrete portion 81, and the space between the tubular member 5 and the upper end surface 21 of the pillar member 2. A portion filled in the joint portion 52 is referred to as a joint concrete portion 82.
The internal concrete portion 81 is fixed to the inner peripheral surface of the tubular member 5 and the column joining reinforcing bars 4, 4.
The joint concrete part 82 is fixed to the lower end surface of the tubular member 5 and the upper end surface 21 of the column member.

Next, a reinforced concrete column beam joining method will be described.
First, as shown in FIG. 4, the column member 2 is constructed so that the plurality of column joining reinforcing bars 4, 4... Protrude from the upper end surface 21 (column member construction step).
Subsequently, the column beam joining member 9 is installed on the column member 2 from above, and a plurality of column joining rebars 4, 4... Are inserted into the column concrete empty space 51 of the tubular member 5 as shown in FIG. Cylindrical member installation process). At this time, the column beam joining member 9 is installed so that the column joining rebar 4 does not interfere with the first beam joining rebars 71, 71... And the second beam joining rebars 72, 72. Further, the column beam joining member 9 is installed on the top of the column member 2 so as to leave a space for the joint portion 52 between the upper end surface 21 of the column member 2 and the lower end portion of the cylindrical member 5.
Then, concrete is cast in the hollow portion 51 for column concrete and the joint portion 52 of the tubular member 5 to form the concrete portion 8 (concrete placing step). At this time, the concrete of the concrete portion 8 is fixed to the inner peripheral surface, the lower end portion, the column joining reinforcing bars 4, 4... And the upper end surface 21 of the column member 2.

Subsequently, the concrete is cast into the inside of the form (not shown) of the beam member 3, the beam concrete empty portions 63 and 63 of the first beam joint member 61 and the second beam joint member 62, respectively. The beam member 3 joined to the member 61 and the second beam joining member 62 is constructed (beam member joining step). At this time, the reinforcing bars of the beam member 3 may be disposed in the beam concrete empty portions 63 and 63. The floor slab concrete may be placed together with the concrete of the beam member 3.
In this way, the column member 2 and the beam member 3 are joined via the column beam joint 1.

Next, operations and effects of the above-described reinforced concrete column beam joint structure and reinforced concrete column beam joint method will be described with reference to the drawings.
In the reinforced concrete column beam joint structure and the reinforced concrete column beam joint method according to the present embodiment described above, the column concrete empty space 51 of the tubular member 5 into which the plurality of column joint rebars 4 and 4 are inserted, and The cylindrical member 5 and the column member 2 are joined by putting concrete into the joint portion 52 integrally.
On the other hand, a conventional precast concrete column beam joint has a plurality of holes through which a plurality of column joint rebars are inserted, and the inside of the plurality of holes through which the column joint rebars are inserted, respectively. The column beam joint and the column member are joined by filling the joint between the column beam joint and the column member with a grout material.

  As described above, in this embodiment, instead of filling the grout material in each of the plurality of holes, concrete may be placed in the column concrete space 51 of the tubular member 5 and the column concrete space 51 may be used. In addition, since the concrete can be integrally cast on the joint portion 52 between the tubular member 5 and the column member 2, in the joining of the column member 2 and the beam member 3, the work period is shortened, the productivity is improved, and the saving is achieved. Humanization can be achieved and cost reduction can be achieved.

  Further, since the beam concrete empty portion 63 is formed in the beam joint members 6 and 6, the concrete is integrally placed with the concrete of the beam member 3 in the beam concrete empty portion 63, thereby forming a cylindrical shape. The member 5 and the beam member 3 can be easily joined. As a result, the column member 2 and the beam member 3 can be easily joined.

The embodiments of the reinforced concrete column beam joint structure and the reinforced concrete column beam joint method according to the present invention have been described above, but the present invention is not limited to the above embodiments and does not depart from the gist thereof. The range can be changed as appropriate.
For example, in the above-described embodiment, the two beam joining members 6 and 6 of the first beam joining member 61 and the second beam joining member 62 are integrally formed with the cylindrical member 5, but one or three or more The beam joining member 6 may be formed integrally with the tubular member 5. Moreover, the position where the beam joining member 6 is provided with respect to the cylindrical member 5 may be set as appropriate.

Moreover, in said embodiment, although the column member 2 is formed in prismatic shape, and the cylindrical member 5 is formed in square cylinder shape, the column member 2 is formed in shapes other than square columns, such as a column shape, The tubular member 5 may be formed in a shape other than a column such as a column.
In the above embodiment, the beam joint member 6 is formed with the beam concrete empty portion 63, but it may not be formed.
Moreover, in said embodiment, although the beam joining member 6 is a product made from precast concrete, you may form other than precast concrete. For example, it may be composed of a reinforcing bar that is connected to the tubular member 5 and joined to the beam member 3. The method for joining the beam joining member 6 and the beam member 3 may be set as appropriate.

1 Beam-column joint (column-beam joint structure made of reinforced concrete)
2 Column member 3 Beam member 4 Column joint rebar 5 Tubular member 6 Beam joint member 7 Beam joint rebar 8 Concrete part 9 Column beam joint member 21 Upper end surface 51 Column concrete empty part 52 Joint part 63 Beam concrete empty part

Claims (3)

In the reinforced concrete column beam connection structure in which the reinforced concrete column member and beam member are joined,
A plurality of column joining reinforcing bars protruding upward from the upper end surface of the column member;
A tubular member made of precast concrete in which a hollow portion for column concrete is formed, which is disposed above the column member and into which the plurality of column joint reinforcing bars can be inserted,
A concrete part placed in a joint between the hollow part for pillar concrete and the tubular member and the pillar member;
A reinforced concrete column beam connection structure comprising: a beam connection member formed integrally with the cylindrical member and to which the beam member is bonded.   2. The reinforced concrete column beam connection structure according to claim 1, wherein the beam joint member is formed with an empty portion for beam concrete in which concrete is cast integrally with the concrete of the beam member. 3. In the reinforced concrete column beam connection method for joining reinforced concrete column members and beam members,
A cylindrical member made of precast concrete formed in a cylindrical shape is installed on the top of the column member, and protrudes upward from the upper end surface of the column member into a column concrete space formed inside the cylindrical member. A cylindrical member installation step for inserting a plurality of column-joined reinforcing bars;
A concrete placing step for placing concrete in a joint portion between the column concrete space and the cylindrical member and the column member;
A beam member joining step of joining the beam member to a beam joining member formed integrally with the tubular member.

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