JP7064976B2 - RC beam structure, column beam frame - Google Patents

Description

The present invention relates to an RC beam structure in which beam main bars are arranged in an X shape, which is erected between columns of a building, and a column-beam structure composed of the RC beam structure and column members.

For example, Patent Document 1 discloses a configuration in which main bars arranged in the longitudinal direction of a beam are arranged in an X-shape in order to increase the rigidity and strength of a beam provided between columns adjacent to each other. Has been done.
When constructing a beam so that the main bars cross each other in an X shape and arrange the beams, for example, when the column is made of precast concrete, one end of the reinforcing bar is embedded in the column and the other end is. It may be provided in advance so as to protrude outward. In such a case, after installing the two columns so that the other ends of these reinforcing bars face each other, the other ends are joined to form the main bar of the beam.

For example, in Patent Document 2, an X-shaped sleeve is provided at a portion where main bars arranged in the longitudinal direction of a beam provided between adjacent columns intersect in an X-shape, and the end of each main bar is provided. The configuration to be inserted into the sleeve tube is disclosed.
In such a configuration, for example, when the column is made of precast concrete, the end portion of the reinforcing bar embedded in the column made of precast concrete is inserted into the X-shaped sleeve at the beam portion. However, the distance between the ends of the reinforcing bars extending from the columns provided on both sides of the beam is narrow, and it is difficult to insert the ends of the reinforcing bars into the X-shaped sleeve. Increasing the distance between the ends of the reinforcing bars extending from the columns provided on both sides of the beam will lead to a decrease in construction accuracy.

Further, Patent Document 3 discloses a configuration in which the end portions of reinforcing bars are bonded to an X-shaped cross portion joint hardware by superimposing two plate-shaped metal fittings and connecting them at a center point. .. In such a configuration, it is necessary to use a special cross joint hardware.

Japanese Unexamined Patent Publication No. 8-246550 Japanese Unexamined Patent Publication No. 8-246549 Japanese Unexamined Patent Publication No. 2002-206314

An object of the present invention is an RC beam structure in which beam main bars are arranged in an X shape between columns, which can be easily and accurately constructed without using special reinforcing bar joint hardware. It is to provide the used column beam frame.

The present invention employs the following means in order to solve the above problems.
The present inventors have an RC beam structure in which the beam main bars are arranged in an X shape between the columns, and the beams are arranged in an X shape in the central portion of the beam without using a special reinforcing bar joint metal fitting. Short connecting reinforcing bars were placed between the beam main bars, and both ends of the connecting reinforcing bars and the beam main bars were joined with general-purpose reinforcing bar joint hardware. Therefore, in the RC beam structure, by providing two reinforcing bar joint hardware adjacent to each other in the middle of the beam main bar arranged in the diagonal direction, the beam main bar can be provided by a plurality of reinforcing bar joint hardware. Focusing on the fact that RC beam structures with diagonal beam main bars arranged in an X shape can be realized without using special reinforcing bar joint hardware inside the beam members. , Which led to the present invention.
That is, the RC beam structure of the present invention is an RC beam structure in which the beam main bars are arranged in an X shape between the columns, and the beam main bars arranged in the X shape is one end of the beam. The first reinforcing bar on the portion side, the second reinforcing bar on the other end side, and the connecting reinforcing bar diagonally provided between them are provided, and the first reinforcing bar, the connecting reinforcing bar, and the second reinforcing bar are provided. The connecting reinforcing bars are each connected by a reinforcing bar joint jig.
According to such a configuration, the beam main reinforcing bar arranged in an X shape is composed of the first reinforcing bar, the second reinforcing bar, and the connecting reinforcing bar divided into three, and each reinforcing bar is a reinforcing bar joint. It is connected by a jig. Specifically, when connecting the reinforcing bars to each other using the reinforcing bar joint jig, the end portion of one of the reinforcing bars is inserted into the reinforcing bar joint jig. After that, with the end of one reinforcing bar facing the end of the other reinforcing bar, the reinforcing bar joint jig is moved to the other reinforcing bar side, and the end of the other reinforcing bar is placed inside the reinforcing bar joint jig. insert. As a result, the end portion of one reinforcing bar and the end portion of the other reinforcing bar are inserted into the reinforcing bar joint jig, and one reinforcing bar and the other reinforcing bar can be connected to each other. Using such a reinforcing bar joint jig, the first reinforcing bar and the connecting reinforcing bar and the second reinforcing bar and the connecting reinforcing bar are connected to each other. As a result, even when the distance between the first rebar and the connecting rebar and the distance between the second rebar and the connecting rebar are narrow, the first rebar and the connecting rebar and the second rebar and the connecting rebar can be connected, respectively. can. In this way, it is possible to realize an RC beam structure in which the first reinforcing bar, the connecting reinforcing bar, and the second reinforcing bar constituting the beam main bar are continuously arranged in an X shape without using a special reinforcing bar joint hardware. ..

In one aspect of the present invention, the RC beam structure of the present invention is characterized in that at least one of the reinforced concrete joint jigs is a mortar-filled joint jig.
According to such a configuration, between the first reinforcing bar and the connecting reinforcing bar constituting the X-shaped beam main reinforcing bar, and between the connecting reinforcing bar and the second reinforcing bar, only one or both of them are provided. A mortar-filled joint jig is arranged, and all reinforcing bars are joined to form a beam main bar.

In one aspect of the present invention, the beam-beam structure of the present invention is a beam-beam structure on the outer periphery of the building, and is of an RC beam structure as described above and a precast concrete structure provided on both sides of the RC beam structure. The RC beam structure is provided with a pillar member, the side surface of the RC beam structure on the inner side of the building is flush with the side surface of the pillar member on the inner side of the building, and at least one of the beam main bars constituting the RC beam structure is the pillar main bar. It is characterized by the fact that the inside is reinforced by a beam.
Alternatively, in one aspect of the present invention, the beam-beam structure of the present invention is a beam-beam structure on the outer periphery of the building, and the RC beam structure as described above and the precast concrete provided on both sides of the RC beam structure. The building interior side side surface of the RC beam structure is provided on the building interior side from the building interior side side surface of the pillar member, and at least one of the beam main bars constituting the RC beam structure is provided. Is characterized in that the inside of the pillar main bar is arranged through a beam.
According to such a configuration, in the beam-beam structure on the outer periphery of the building, the RC beam structure is provided flush with the side surface of the pillar member on the inside side of the building, or at least on the inside side of the building rather than the side surface of the pillar member on the inside side of the building. Since one of the beam main bars constituting the RC beam structure is arranged through the beam through the inside of the column main bar, the strength of the RC beam structure is formed even if the column and the RC beam structure are largely eccentrically joined. Since at least one of the beam main bars penetrates the inside of the beam main bars through the beam, the column and the RC beam structure can be firmly joined.
Further, since the pillar type does not project to the inside of the building, it is possible to increase the floor area of the room, and it is possible to realize a pillar-beam frame having a convenient building room.

According to the present invention, it is possible to provide an RC beam structure in which beam main bars are arranged in an X shape between columns, and a column-beam frame using the RC beam structure, which can be easily and accurately constructed. Will be.

It is a plan sectional view which shows the structure of the building provided with the RC beam structure and the column beam frame in this embodiment. It is a front view which shows the RC beam structure shown in FIG. 1 and the schematic structure of a column beam frame. FIG. 2 is a cross-sectional view taken along the line AA of the beam end position of the RC beam structure shown in FIG. It is a front view of the RC beam structure shown in FIG. FIG. 2 is a cross-sectional view taken along the line BB of the beam end position of the RC beam structure shown in FIG. It is a plan (downward view) of the RC beam structure shown in FIG. It is a partial cross-sectional view which shows the connection structure of the diagonal beam main bar of the RC beam structure shown in FIG. FIG. 1 is a construction explanatory view 1 (a state in which a pillar member made of PCaRC is built) of the RC beam structure shown in FIG. FIG. 2 is a construction explanatory view 2 (relationship between the beam main bar and the connecting reinforcing bar to which the reinforcing bar joint jig is attached) of the RC beam structure shown in FIG. FIG. 3 is a construction explanatory view 3 (joint state of the beam main bar and the reinforcing bar joint jig) of the RC beam structure shown in FIG. It is a modification 1 of this embodiment, and is a front view of the RC beam structure in which the connecting reinforcing bar has a smaller diameter than the beam main bar of the X-shaped reinforcing bar. FIG. 2 is a modification 2 of the present embodiment, and is a front view of an RC beam structure in which a mortar-filled joint jig is attached only to one end of a connecting reinforcing bar. FIG. 3 is a modification 3 of the present embodiment, and is a partial cross-sectional view in which the RC beam structure is provided on the inner side of the building from the pillar member. 13 is a partial perspective view of the column-beam frame of the present embodiment shown in FIGS. 13 and 3.

The present invention is an RC beam structure in which beam main bars are arranged in an X shape between columns, and a column-beam structure at the outer periphery of a building formed of the RC beam structure and precast concrete column members.
In the embodiment of the RC beam structure, the beam main bars are arranged in two stages in each of the upper and lower stages, and the outer beam main bars in both the upper and lower stages are arranged in parallel in the material axis direction of the beam, and the upper and lower stages are inner beam main bars. Is arranged in an X shape. Further, in the beam main bar arranged in an X shape, connecting reinforcing bars are arranged near the center of the beam, and general-purpose reinforcing bar joint jigs are provided at both ends of the connecting reinforcing bars. And the connecting reinforcing bars are joined (FIGS. 2 to 10).
Modification 1 is different from the above embodiment in that the outer diameter of the connecting reinforcing bar is smaller than that of the beam main bar of the X-shaped reinforcing bar, and is the same except for the above embodiment (FIG. 11).
In the second modification, the fitting joint jig is attached in advance to the end side of the beam main bar fixed to the column, and the mortar filling type joint jig is attached to only one end of the connecting reinforcing bar. Unlike the above embodiment, the others are the same (FIG. 12).
Modification 3 is different from the above embodiment in that the side surface of the RC beam structure on the inner side of the building is provided on the inner side of the building from the side surface of the pillar member on the inner side of the building, and the other aspects are the same (FIG. 13).

Hereinafter, with reference to the attached drawings, the RC beam structure and the embodiment for implementing the column-beam frame according to the present invention will be described with reference to the drawings.
FIG. 1 shows a plan sectional view showing the structure of a building provided with an RC beam structure and a column-beam frame in the present embodiment. FIG. 2 is a front view showing the RC beam structure shown in FIG. 1 and the schematic configuration of the column-beam frame. FIG. 3 is a cross-sectional view taken along the line AA of the beam end position of the RC beam structure shown in FIG. FIG. 4 is a front view of the RC beam structure shown in FIG. FIG. 5 is a cross-sectional view taken along the line BB at the beam end position of the RC beam structure shown in FIG. FIG. 6 is a plan (downward view) of the RC beam structure shown in FIG. FIG. 7 is a cross-sectional view showing the connection structure of the diagonal beam main bar of the RC beam structure shown in FIG. FIG. 8 is a construction explanatory view 1 (state in which a pillar member made of PCaRC is built) of the RC beam structure shown in FIG. 2, and is a diagram showing a state in which a pillar member made of precast concrete is built. FIG. 9 is a construction explanatory view 2 (relationship between the beam main bar and the connecting reinforcing bar to which the reinforcing bar joint jig is attached) of the RC beam structure shown in FIG. FIG. 10 is a construction explanatory view 3 (joining state of the beam main bar and the reinforcing bar joint jig) of the RC beam structure shown in FIG.
As shown in FIG. 1, the building 1 includes a foundation portion (not shown) constructed in the ground and a superstructure 2 constructed on the foundation portion.
The superstructure 2 has a plurality of floors in the vertical direction. The superstructure 2 includes a plurality of columns 3 and a beam 4 erected between columns 3 adjacent to each other.

A pillar-beam frame 20 as shown below is provided on the outer peripheral portion of the building 1.
As shown in FIGS. 1 and 2, the column-beam structure 20 includes a precast concrete column member (column) 30 and an RC (reinforced concrete) RC beam (RC beam structure, beam) 40. There is.
The pillar member 30 extends in the vertical direction. The pillar member 30 has a rectangular cross-sectional shape orthogonal to the axial direction extending in the vertical direction and has a long side in the horizontal direction along the outer peripheral surface of the building 1. As shown in FIG. 2, the column member 30 has a column main bar 31 extending in the vertical direction, a shear reinforcing bar (not shown), and a precast concrete portion 33.

The RC beam 40 is provided so as to extend in the horizontal direction between the pillar members 30 adjacent to each other in the horizontal direction along the outer peripheral surface of the building 1. The RC beam 40 has a vertically long rectangular shape whose long side is the vertical direction along the outer peripheral surface of the building 1 and whose vertical cross-sectional shape is orthogonal to the axial direction extending in the horizontal direction.
As shown in FIG. 3, the RC beam 40 is provided so that the side surface 40f on the inner side of the building is flush with the side surface 30f on the inner side of the building of the pillar member 30 so that the wall surface 5 is formed. In FIG. 3, the right side of the paper is the building inner side I, and the left side of the paper is the building outer side O.
As shown in FIGS. 3 and 4, the RC beam 40 includes a horizontal beam main bar 41, an oblique beam main bar (beam main bar) 42, a beam shear reinforcing bar 43, and a concrete portion 44.
The horizontal beam main bar 41 is arranged at the upper part and the lower part of the RC beam 40, respectively. In the present embodiment, the horizontal beam main bars 41 are spaced apart from each other in the horizontal direction (width direction of the RC beam 40) orthogonal to the wall surface 5 of the building 1 at the upper part and the lower part of the RC beam 40, for example, four by four. Is provided. The horizontal beam main bar 41 is embedded in the column member 30, and its end portion 41a projects laterally from the column member 30. The end 41a of the horizontal beam main bar 41 on the one end 40a side of the RC beam 40 and the end 41a of the horizontal beam main bar 41 on the other end 40b side of the RC beam 40 are connected by a mechanical joint 49. ing.
Further, as shown in FIG. 4, the beam shear reinforcing bar 43a embedded in the column member 30 at the end of the RC beam 40 in the length direction is provided with beam shear reinforcement in other portions. A large-diameter reinforcing bar that is one size larger than the reinforcing bar 43 is used. Instead of this, two beam shear reinforcing bars 43 provided in other portions may be wound adjacent to each other.

The diagonal beam main bar 42 is provided between the horizontal beam main bar 41 provided at the upper part of the RC beam 40 and the horizontal beam main bar 41 provided at the lower part of the RC beam 40 as shown in FIGS. There is. The diagonal beam main bar 42 is provided so as to extend diagonally between the column members 30 adjacent to each other. Specifically, the diagonal beam main bar 42 extends diagonally upward or diagonally downward from one end 40a side of the RC beam 40 toward the other end side. As shown in FIGS. 3, 5, and 6, in the present embodiment, for example, a total of four diagonal beam main bars 42 are provided at intervals in the width direction of the RC beam 40. As shown in FIGS. 3 to 5, the diagonal beam main bars 42 adjacent to each other in the width direction of the RC beam 40 are different from each other in the diagonal direction. That is, between the diagonal beam main bars 42 adjacent to each other in the width direction of the RC beam 40, one diagonal beam main bar 42A faces diagonally upward from one end 40a side of the RC beam 40 toward the other end side. It extends. The diagonal beam main bars 42 adjacent to each other in the width direction of the RC beam 40, and the other diagonal beam main bar 42B extends diagonally downward from one end 40a side of the RC beam 40 toward the other end side. ing.
As a result, when the RC beam 40 is viewed from the direction orthogonal to the wall surface 5 of the building 1 (the width direction of the RC beam 40), the diagonal beam main bars 42 adjacent to each other in the width direction of the RC beam 40 are arranged in an X shape. It is streaked.

As shown in FIGS. 4 and 7, the diagonal beam main bar 42A includes a first reinforcing bar 45A, a second reinforcing bar 46A, and a connecting reinforcing bar 47A. The first reinforcing bar 45A is provided on one end 40a side of the RC beam 40. The first reinforcing bar 45A is embedded in a column member 30 located on one end 40a side of the RC beam 40, and the end 45s projects laterally from the side surface of the column member 30. The end portion 45s of the first reinforcing bar 45A extends diagonally upward toward the other end portion 40b side of the RC beam 40.
The second reinforcing bar 46A is provided on the other end 40b side of the RC beam 40. The second reinforcing bar 46A is embedded in a column member 30 located on the other end portion 40b side of the RC beam 40, and the end portion 46s projects laterally from the side surface of the column member 30. The end portion 46s of the second reinforcing bar 46A extends diagonally downward toward one end portion 40a side of the RC beam 40.
The connecting reinforcing bar 47A is provided so as to extend diagonally between the end portion 45s of the first reinforcing bar 45A and the end portion 46s of the second reinforcing bar 46A.

As shown in FIG. 4, the diagonal beam main bar 42B includes a first reinforcing bar 45B, a second reinforcing bar 46B, and a connecting reinforcing bar 47B. The first reinforcing bar 45B is provided on one end 40a side of the RC beam 40. The first reinforcing bar 45B is embedded in a column member 30 located on one end 40a side of the RC beam 40, and the end 45t thereof projects laterally from the side surface of the column member 30. The end portion 45t of the first reinforcing bar 45B extends diagonally downward toward the other end portion 40b side of the RC beam 40.
The second reinforcing bar 46B is provided on the other end portion 40b side of the RC beam 40. The second reinforcing bar 46B is embedded in a column member 30 located on the other end 40b side of the RC beam 40, and the end portion 46t projects laterally from the side surface of the column member 30. The end portion 46t of the second reinforcing bar 46B extends diagonally upward toward one end portion 40a side of the RC beam 40.
The connecting reinforcing bar 47B is provided so as to extend diagonally between the end portion 45t of the first reinforcing bar 45B and the end portion 46t of the second reinforcing bar 46B.

As shown in FIG. 7, the first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B, and the second reinforcing bars 46A and 46B and the connecting reinforcing bars 47A and 47B are connected by the reinforcing bar joint jig 50, respectively. The diagonal beam main bar 42A and the diagonal beam main bar 42B differ only in the diagonal direction, and the connecting structure by the reinforcing bar joint jig 50 is the same. Therefore, in the following, the diagonal beam main bar 42A shown in FIG. 7 is used. The explanation will be given with reference to it.
The first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B are connected as a reinforcing bar joint jig 50 by a mortar filling type joint jig 51. As shown in FIG. 7, the mortar-filled joint jig 51 (for example, a trade name manufactured by Tokyo Steel Co., Ltd .: mortar-filled joint boltops) has a tubular jig main body 53 and a inside of the jig main body 53. The mortar 54 to be filled in is provided. The ends 45s and 45t of the first reinforcing bars 45A and 45B and the ends 47s and 47t of the connecting reinforcing bars 47A and 47B are inserted into the jig main body 53. The ends 45s and 45t of the first reinforcing bars 45A and 45B and the ends 47s and 47t of the connecting reinforcing bars 47A and 47B face each other at a predetermined distance in the jig main body 53. The jig main body 53 has an inner diameter larger than the outer diameter of the first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B, and can be slidably moved in the stretching direction of the first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B. ing. The jig main body 53 is provided with fixing bolts 53b and 53c. The fixing bolts 53b and 53c are provided so as to be able to advance and retreat in the radial direction of the jig main body 53. The fixing bolts 53b and 53c have their tips abutting against the first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B inserted in the jig main body 53, so that the jig main body 53 has the first reinforcing bars 45A and 45B. Fix the connecting reinforcing bars 47A and 47B so as not to move in the stretching direction. The mortar 54 is filled in the jig body 53 from the injection port 53h formed in the jig body 53, and is connected to the inner peripheral surface of the jig body 53 and the ends 45s, 45t of the first reinforcing bars 45A, 45B. The gap between the ends 47s and 47t of the reinforcing bars 47A and 47B is closed. When the mortar 54 is hardened, the first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B are joined by the mortar filling type joint jig 51.

The second reinforcing bars 46A and 46B and the connecting reinforcing bars 47A and 47B are fitting joint jigs 52 for threaded reinforcing bars (for example, trade name made by Tokyo Steel Co., Ltd .: threaded reinforcing bar joint free) as the reinforcing bar joint jig 50. It is connected by a joint). The fitting joint jig 52 for the threaded reinforcing bar has a cylindrical jig body 56. On the inner peripheral surface of the jig body 56, a screw groove (not shown) is formed to be screwed into a screw node (not shown) formed on the outer peripheral surfaces of the second reinforcing bars 46A and 46B and the connecting reinforcing bars 47A and 47B. There is. The screw joints (not shown) formed at the ends 46s and 46t of the second reinforcing bars 46A and 46B and the screw joints (not shown) formed at the ends 47u and 47v of the connecting reinforcing bars 47A and 47B are cured, respectively. It is screwed into the screw groove (not shown) of the tool body 56. Further, the end portions 46s, 46t of the second reinforcing bars 46A, 46B and the end portions 47u, 47v of the connecting reinforcing bars 47A, 47B face each other with a predetermined gap in the jig main body 56. The jig body 56 is filled with a filler 57 such as epoxy resin between the ends 46s and 46t of the second reinforcing bars 46A and 46B and the ends 47u and 47v of the connecting reinforcing bars 47A and 47B. As a result, the end portions 46s, 46t of the second reinforcing bars 46A, 46B and the end portions 47u, 47v of the connecting reinforcing bars 47A, 47B are joined by the fitting joint jig 52 for the thread joint reinforcing bar.

As shown in FIG. 4, the beam shear reinforcing bar 43 is wound around the central axis of the RC beam 40 so as to surround the horizontal beam main bar 41 and the diagonal beam main bar 42 as described above.
The concrete portion 44 is cast in the field so as to embed the horizontal beam main bar 41, the diagonal beam main bar 42, the mortar filling type joint jig 51, the fitting joint jig 52 for the threaded joint reinforcing bar, and the beam shear reinforcing bar 43. It is formed by cast concrete.

(RC beam construction method)
Next, the construction method of the RC beam 40 as described above will be described.
First, as shown in FIG. 8, the precast concrete pillar member 30 is built in a predetermined position. The upper and lower horizontal beam main bars 41, the first reinforcing bars 45A and 45B, and the second reinforcing bars 46A and 46B are embedded in the column member 30 in advance. The mechanical joint 49 for connecting the upper and lower horizontal beam main bars 41 to each other is provided close to one of the horizontal beam main bars 41 facing each other.
When the column member 30 is built in a predetermined position, the first reinforcing bar 45A located on one end 40a side of the RC beam 40 between the column members 30 adjacent to each other in the horizontal direction along the wall surface 5 of the building 1. , 45B end portions 45s, 45t and the end portions 46s, 46t of the second reinforcing bars 46A, 46B located on the other end portion 40b side of the RC beam 40 face each other in a diagonally spaced state.

Next, as shown in FIG. 9, the horizontal beam main bars 41 are connected to each other by the mechanical joint 49. Subsequently, the connecting reinforcing bars 47A and 47B are inserted between the upper and lower ends 45s and 45t of the first reinforcing bars 45A and 45B and the ends 46s and 46t of the second reinforcing bars 46A and 46B. At this time, the jig main body 53 of the mortar filling type joint jig 51 is attached to the ends 47s and 47t of the connecting reinforcing bars 47A and 47B, and the fitting joints for the screw joint reinforcing bars are attached to the ends 47u and 47v. The jig body 56 of the tool 52 is attached.
After inserting the connecting reinforcing bars 47A and 47B between the ends 45s and 45t of the first reinforcing bars 45A and 45B and the ends 46s and 46t of the second reinforcing bars 46A and 46B, as shown in FIG. The jig body 56 of the fitting joint jig 52 is rotated, and the ends 46s, 46t of the second reinforcing bars 46A, 46B are screwed into the jig body 56. Further, the jig body 53 of the mortar filling type joint jig 51 is slid toward the first reinforcing bars 45A and 45B, and the ends 45s and 45t of the first reinforcing bars 45A and 45B are inserted inside the jig body 53.
After that, a filler 57 such as epoxy resin is filled in the jig body 56 of the fitting joint jig 52 for the threaded reinforcing bar, and the mortar 54 is filled in the jig body 53 of the mortar filling type joint jig 51. Fill. After the filler 57 and the mortar 54 are hardened, the first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B, and the second reinforcing bars 46A and 46B and the connecting reinforcing bars 47A and 47B are connected.

After that, the beam shear reinforcing bar 43 is arranged around the horizontal beam main bar 41. Further, in order to form the concrete portion 44 of the RC beam 40, a formwork (not shown) is assembled and concrete is placed in the formwork. The concrete portion 44 is formed by curing the cast concrete for a predetermined period and developing a predetermined strength. After that, the RC beam 40 is formed by dismantling and removing the formwork.

(Action and effect of RC beam structure and column beam frame)
The effects of the RC beam structure and the column-beam frame described above will be described below.
According to the RC beam 40, the RC beam 40 is an RC beam 40 in which diagonal beam main bars 42 are arranged in an X shape between the column members 30, and the diagonal beam main bars 42A arranged in an X shape. , 42B are the first reinforcing bars 45A and 45B on the one end 40a side of the RC beam 40, the second reinforcing bars 46A and 46B on the other end 40b side, and the connecting reinforcing bars 47A diagonally provided between them. , 47B, and the first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B, and the second reinforcing bars 46A and 46B and the connecting reinforcing bars 47A and 47B are connected by a reinforcing bar joint jig 50, respectively.
According to such a configuration, when connecting the first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B, and the second reinforcing bars 46A and 46B and the connecting reinforcing bars 47A and 47B by using the reinforcing bar joint jig 50, the reinforcing bar joint is repaired. One of the connecting reinforcing bars 47A and 47B is inserted into the tool 50. After that, with the first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B, and the second reinforcing bars 46A and 46B and the connecting reinforcing bars 47A and 47B facing each other, the reinforcing bar joint jig 50 is used as the other first reinforcing bar 45A and 45B. , The second reinforcing bars 46A and 46B are moved, and the other first reinforcing bars 45A and 45B and the second reinforcing bars 46A and 46B are inserted inside the reinforcing bar joint jig 50. As a result, the first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B, and the second reinforcing bars 46A and 46B and the connecting reinforcing bars 47A and 47B are inserted into the reinforcing bar joint jig 50. Using such a reinforcing bar joint jig 50, the first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B, and the second reinforcing bars 46A and 46B and the connecting reinforcing bars 47A and 47B can be connected, respectively. As a result, even when the gaps between the first reinforcing bars 45A and 45B, the connecting reinforcing bars 47A and 47B, and the second reinforcing bars 46A and 46B constituting the diagonal beam main reinforcing bar 42 are narrow, the diagonal joint hardware is not used. It is possible to realize an RC beam 40 in which the beam main bars 42 are arranged in an X shape.
Therefore, it is possible to provide an RC beam 40 in which diagonal beam main bars 42 are arranged in an X shape between the column members 30 which can be easily and accurately constructed.

Further, according to the above configuration, the diagonal beam main bar 42 is divided into three, first reinforcing bars 45A and 45B, second reinforcing bars 46A and 46B, and connecting reinforcing bars 47A and 47B before construction. Therefore, for example, as compared with the case where the diagonal beam main bar is divided into two, a first reinforcing bar and a second reinforcing bar, and these are connected by a reinforcing bar joint jig, the first reinforcing bars 45A and 45B and the second reinforcing bar from the column member 30 are compared. The protrusion lengths of 46A and 46B can be shortened. Therefore, when the pillar member 30 is manufactured, for example, in a factory, it can be easily transported to the construction site.

Further, at least one of the reinforcing bar joint jigs 50 is a mortar filling type joint jig 51. More specifically, in the present embodiment, one of the reinforcing bar joint jigs 50 is a mortar filling type joint jig 51, and the other is a fitting joint jig 52 for threaded reinforcing bars.
According to such a configuration, the first reinforcing bars 45A and 45B, the connecting reinforcing bars 47A and 47B, and the second reinforcing bars 46A and 46B constituting the diagonal beam main bar 42 are connected to the mortar filling type joint jig 51 and other reinforcing bar joints. It can be connected by using a tool 50, for example, a fitting joint jig 52 for threaded reinforcing bars. At the time of construction, the second reinforcing bars 46A and 46B are connected to the connecting reinforcing bars 47A and 47B, and the first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B are connected to the mortar filling type joint by the fitting joint jig 52 for the thread joint reinforcing bar. Connect with the jig 51. The mortar-filled joint jig 51 fills the jig body 53 with the mortar 54 after inserting the first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B inside the tubular jig main body 53. Therefore, there is a radial gap in which the mortar 54 is filled between the inner peripheral surface of the jig body 53 and the outer peripheral surfaces of the first reinforcing bars 45A and 45B and the connecting reinforcing bars 47A and 47B. Therefore, after connecting the second reinforcing bars 46A and 46B and the connecting reinforcing bars 47A and 47B with the fitting joint jig 52 for the thread joint reinforcing bars, the ends 47s and 47t of the connecting reinforcing bars 47A and 47B and the first reinforcing bar 45A The first reinforcing bars 45A and 45B can be easily inserted into the jig body 53 of the mortar filling type joint jig 51 even if the ends 45s and 45t of the 45B are displaced from each other. Therefore, the construction can be easily performed.

As described above, in the mortar filling type joint jig 51, since it is not necessary to fit the reinforcing bars on both sides of the tubular jig main body 53 with the jig main body 53, the shape of the reinforcing bars and the outside of the reinforcing bars to some extent Even if the reinforcing bars have different diameters, they can be joined via a joining material (for example, mortar, grout material, adhesive), but on the other hand, between the reinforcing bar and the tubular jig body 53, It is necessary to secure a predetermined adhesion area, and as shown in FIG. 4, the joint portion of the mortar filling type joint jig 51 tends to be longer than that of the fitting joint jig 52 for threaded reinforcing bars. Further, in the case of the mortar filling type joint jig 51, the joining material is formed in a portion where the joining material between the tubular jig main body 53 and the reinforcing bar inserted into the tubular jig main body 53 is filled. The position of the reinforcing bar can be adjusted until it hardens. For example, in the case of the mortar filling type joint jig 51 for the deformed reinforcing bar D32, the thickness between the cylindrical jig main body 53 and the reinforcing bar inserted into the tubular jig main body 53 is thick in the outer peripheral direction. A portion filled with the 8 mm joint material is secured.
Therefore, in the beam body of the X-shaped reinforcing bar, there are cases where two mortar filling type joint jigs 51 can be installed near the center of the beam main bar of the X-shaped reinforcing bar, and one of them is filled with mortar as in the present embodiment. In some cases, a type joint jig 51 is installed, and a fitting joint jig 52 for threaded reinforcing bars is installed on the other side to join the beam main bars to each other. In the RC beam structure in which the mortar filling type joint jig 51 of the present embodiment and the fitting joint jig 52 for the threaded reinforcing bar are used in combination, the inside of the jig main body 56 constituting the fitting joint jig 52 for the threaded reinforcing bar No mortar filling is required, and there is no need to perform mortar filling work, and the construction period can be shortened. Further, the fitting joint jig 52 for the threaded reinforcing bar can have a shorter joint portion than the mortar filling type joint jig 51, has a wide range of application to the beam main bar of the X-shaped reinforcing bar, and is easy to use.
However, even if an attempt is made to connect the beam main bars of the X-shaped reinforcing bar by installing two sets of fitting joint jigs 52 for the threaded reinforcing bars, the fitting joint jig needs to be fitted with the threaded joint reinforcing bars. Therefore, at the joint position of the fitting joint jig 52 for the threaded rebar, the movable amount of the reinforcing bar for adjusting the position of the beam main bar is small, and the fitting joint jig 52 for the threaded reinforcing bar 2 is used. It is difficult to join the beam main bars together by using them together.
Therefore, in the RC beam structure in which the beam main bars are arranged in an X shape, the connecting reinforcing bars 47A and 47B are arranged between the beam main bars, and the connecting reinforcing bars 47A and 47B are fitted to one end of the connecting reinforcing bars for screw joint reinforcing bars. The combination of the joint jig 50 of the beam main bar with the joint joint jig 52 arranged and the mortar filling type joint jig 51 provided at the other end can be easily and accurately constructed without using special reinforcing bar joint hardware. It is preferable as a means for joining the main reinforcing bar of the beam.
Further, the beam end portion of the RC beam is provided with a beam shear reinforcing bar 43a having a larger amount of reinforcing bars than the beam shear reinforcing bar 43 provided in the beam main body portion other than the beam end portion, whereby the column and the RC beam are provided. Since the strength of the joint with the beam is increased, high structural safety can be ensured in the beam-beam structure.

Further, the column-beam structure 20 as described above is a column-beam structure 20 on the outer periphery of the building 1, and the RC beam 40 as described above and the precast concrete column members provided on both sides of the RC beam 40. The wall surface 5 is formed so that the side surface 40f on the inner side of the building of the RC beam 40 is flush with the side surface 30f on the inner side of the building of the pillar member 30.
According to such a configuration, the flush wall surface 5 can be constructed by the building internal side side surface 40f of the RC beam 40 and the building internal side side surface 30f of the pillar member 30. The pillar type and the beam type do not protrude on the indoor side I of the building 1. Therefore, it is possible to realize a pillar-beam frame 20 having a convenient building interior in which the pillar-shaped or beam-shaped does not protrude to the indoor side of the building 1.

(Modification example)
The RC beam structure and the column-beam frame of the present invention are not limited to the above-described embodiments described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
For example, in the first modification, as shown in FIG. 11, the connecting reinforcing bars 47A'and 47B'have a smaller outer diameter than the first reinforcing bars 45A and 45B and the second reinforcing bars 46A and 46B. As a result, the first reinforcing bars 45A and 45B and the second reinforcing bars 46A and 46B are inserted into the jig main body 53 of the mortar filling type joint jig 51 and the jig main body 56 of the fitting joint jig 52 for threaded reinforcing bars. At this time, the jig bodies 53 and 56 can be moved more in the radial direction thereof. Therefore, the first reinforcing bars 45A and 45B and the second reinforcing bars 46A and 46B can be easily inserted into the jig main bodies 53 and 56 to perform the connection work. Further, since the connecting reinforcing bars 47A'and 47B' have smaller diameters than the first reinforcing bars 45A and 45B and the second reinforcing bars 46A and 46B, the concrete filling performance in the RC beam can be improved.

In the above embodiment, as shown in FIG. 9, at the time of construction, the jig main body 53 of the mortar filling type joint jig 51 and the fitting joint jig for the threaded reinforcing bar are attached to both ends of the connecting reinforcing bars 47A and 47B. The jig main body 56 of 52 is attached, but the present invention is not limited to this.
For example, in the second modification, as shown in FIG. 12, only one of the jig main body 53 of the mortar filling type joint jig 51 and the jig main body 56 of the fitting joint jig 52 for threaded reinforcing bars is used. Is attached to the connecting reinforcing bars 47A and 47B, and the other is attached to the second reinforcing bars 46A and 46B (or the first reinforcing bars 45A and 45B). Further, if possible, the jig main body 53 of the mortar filling type joint jig 51 and the jig main body 56 of the fitting joint jig 52 for the thread-knot rebar are provided with the first reinforcing bars 45A and 45B and the second reinforcing bar. It may be attached to 46A and 46B. As a result, since the reinforcing bar joint jig 50 is attached to the tip of the beam main bar previously fixed to the column member 30, the amount of connection work between the connecting reinforcing bars 47A and 47B and the beam main bar at the construction site can be reduced. Therefore, it is possible to shorten the construction period.

Further, in the above embodiment, the building internal side side surface 30f of the pillar member 30 and the building internal side side surface 40f of the RC beam 40 are flush with each other, but the present invention is not limited to this.
For example, in the third modification, as shown in FIG. 13, the building interior side side surface 40f of the RC beam 40 may be provided on the building interior side I from the building interior side side surface 30f of the pillar member 30. As a result, the pillar type does not protrude toward the building interior side I, and the beam type joined to the upper part of the pillar protrudes from the pillar type toward the building interior side I, for example, as shown in FIG. 14 (b) described later. Therefore, it is possible to increase the floor area of the interior, and it is possible to realize a column-beam structure having a convenient building interior.

Further, in the above-described embodiment and each modification, at least one of the beam main bars 41 and 42 constituting the RC beam 40 is arranged with a beam through the inside of the column main bar 31 as shown in each drawing of FIG. It may be streaked.
FIG. 14A is a perspective view of a column-beam frame in the case where the building internal side side surface 40f of the RC beam 40 and the building internal side side surface 30f of the column member 30 are flush with each other, for example, as shown in FIG. Is. Further, FIG. 14B shows a case where the building internal side surface 40f of the RC beam 40 is provided on the building internal side I from the building internal side side surface 30f of the pillar member 30, as shown in FIG. 13 as a modification 3. It is a perspective view of a column beam frame.
In any case, at least one of the beam main bars 41 and 42 indicated by the alternate long and short dash line is the inside of the column main bar 31, that is, the beam on the building outer side O of the column main bar 31 provided on the building inner side I. Reinforcement is arranged through.
In such a structure, even if the column member 30 and the RC beam structure 40 are largely eccentrically joined, at least one of the beam main bars 41 and 42 forming the bearing capacity of the RC beam structure 40 is a beam inside the column main bar 31. Since it penetrates through, the column member 30 and the RC beam structure 40 can be firmly joined.
In addition to this, as long as it does not deviate from the gist of the present invention, it is possible to select the configuration described in the above embodiment or change it to another configuration as appropriate.

1 Building 41 Horizontal beam main bar 5 Wall surface 42, 42A, 42B Diagonal beam main bar (beam main bar)
20 Pillar beam frame 45A, 45B 1st reinforcing bar 30 Pillar member (pillar) 46A, 46B 2nd reinforcing bar 30f Building interior side side surface 47A, 47A', 47B, 47B'Connecting reinforcing bar 40 RC beam (RC beam structure, beam) 50 Reinforcing bar Joint jig 40a One end 51 Mortal filling type joint jig 40b The other end 52 Fitting joint jig 40f for threaded rebar 40f Inside side of the building

Claims (4)

It is an RC beam structure in which the beam main bars are arranged in an X shape between the columns.
The beam main reinforcing bars arranged in an X shape include a first reinforcing bar on one end side of the beam, a second reinforcing bar on the other end side, and a connecting reinforcing bar diagonally provided between them. Equipped with
An RC beam structure characterized in that the first reinforcing bar and the connecting reinforcing bar, and the second reinforcing bar and the connecting reinforcing bar are connected by a reinforcing bar joint jig, respectively. The RC beam structure according to claim 1, wherein at least one of the reinforcing bar joint jigs is a mortar-filled joint jig. It is a pillar-beam frame on the outer circumference of the building.
The RC beam structure according to claim 1 or 2,
A precast concrete column member provided on both sides of the RC beam structure is provided.
The side surface of the RC beam structure on the inner side of the building is flush with the side surface of the pillar member on the inner side of the building, and at least one of the beam main bars constituting the RC beam structure is arranged through a beam through the inside of the column main bar. A pillar-beam structure characterized by being made. It is a pillar-beam frame on the outer circumference of the building.
The RC beam structure according to claim 1 or 2,
A precast concrete column member provided on both sides of the RC beam structure is provided.
The side surface of the RC beam structure on the inner side of the building is provided on the inner side of the building from the side surface of the pillar member on the inner side of the building, and at least one of the beam main bars constituting the RC beam structure is passed through the inside of the column main bar. A column-beam structure characterized by the arrangement of reinforcement.

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