JP2712955B2 - Reinforced concrete beam rebar assembly method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling a reinforcing bar of a reinforced concrete beam, for example, and more particularly to an assembling method of attaching a reinforcing bar of a beam orthogonal to a column.

[0002]

2. Description of the Related Art Conventionally, in such a method of assembling a reinforcing bar of a reinforced concrete beam, a reinforcing bar of a beam pre-assembled into a reinforcing bar of a column is sequentially dropped into a predetermined position, so that a main bar of the beam penetrates the column portion and is connected to an adjacent span. It is bridged so that it is connected, and then the main bars are connected.

[0003] In this method, when the reinforcing bars of the beams are dropped, there is a case where the reinforcing bars of the beams come into contact with the main bars of the column and do not smoothly fall to a predetermined position. It takes a long time to arrange the reinforcing bars, and it is difficult to sufficiently achieve the effect of the rationalization by the assembled reinforcing bars.

In response to such a problem, for example, as shown in Japanese Patent Publication No. 52-20776, reinforcing bars of members such as columns and beams are prepared in advance, and prior to assembling the formwork on site. A construction method of assembling the reinforcing bars of columns and beams has been proposed. At this time, both ends of the beam upper main bar are formed to have a length that can be accommodated in the reinforcing bar of the column, while both ends of the beam lower main bar are formed to a length that does not fit in the reinforcing bar of the column. Hang the reinforcing bar of the beam above the reinforcing bar of the column, and suspend and support it. Adjacent main reinforcing bars are connected to each other by a joint, and the lower main bar of the beam is connected to the connecting portion via a reinforcing bar, whereby a reinforcing bar of the beam is attached to the column portion.

[0005] Regarding the attachment of a reinforcing bar to an orthogonal beam, a construction method disclosed in Japanese Patent Application Laid-Open No. 63-11769 has been proposed. In this publication, a lower rebar unit and an upper rebar unit in which beam rebars are assembled are formed, and portions of the lower rebar unit and the upper rebar unit which avoid the anchoring portion to the beam / column panel zone are respectively U-shaped. A stirrup and an inverted U-shaped stirrup are installed. Then, the lower reinforcing bar unit is first fixed to the column reinforcing bar, and then another lower reinforcing bar unit is fixed in a direction perpendicular to the lower reinforcing bar unit, and the hoop reinforcing bar is arranged on the column reinforcing bar located above the fixing portion. After that, the upper rebar unit is suspended, the joint between the upper rebar unit and the lower rebar unit, the stirrup attached to both units, and the adjacent upper rebar unit are overlapped and spliced, and both directions perpendicular to each other between the column rebars The main beams of the beam are established.

[0006]

However, in the former method, not only the connection of the main reinforcing bars is required, but also the time required for the rebar arrangement work on the slab is long, and the reinforcing bars are attached to the beams orthogonal to each other. There is a problem that it is difficult.

[0007] On the other hand, even in the latter method, there is a problem that the work of arranging the reinforcing bars on the slab takes a long time due to the overlapping and joining of the main reinforcing bars.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and is a reinforced concrete beam capable of reducing the labor of an assembling method for attaching a reinforcing bar of a beam orthogonal to a pillar portion and improving the workability thereof. An object of the present invention is to provide a method of assembling a reinforcing bar.

[0009]

According to the present invention, there is provided an assembling method for attaching a reinforcing bar of a reinforced concrete orthogonal beam to a pillar portion by attaching a U-shaped stirrup to a beam lower main bar of a beam reinforcing bar. Both ends of the beam bottom main reinforcement are formed in an L-shape bent downward,
The main end of the lower end of the beam is assembled into a column by bridging the character-shaped end between the columns, and a stirrup is attached to the main main beam of the orthogonal beam orthogonal to the main lower end of the beam at the post, and both ends are bent upward. The orthogonal beam is placed on the main bar at the lower end of the beam, and an inverted U-shaped stirrup is attached to the main bar at the upper end of the beam reinforcement, and the main bar at the upper end of the beam is suspended between columns. This is characterized in that it is mounted and fixed to the beam main reinforcement of the orthogonal beam.

[0010] Further, the swallowing length of the beam main reinforcement into the column is set to be not more than D / 2 with respect to the width D of the column.

[0011]

According to the above construction, in the method of assembling a reinforcing steel bar of a reinforced concrete beam according to the present invention, a beam reinforcing steel and an orthogonal beam can be formed in a factory or the like in advance. The L-shaped end of the beam is locked to bridge the beam reinforcement between the columns, and then the orthogonal beam is placed on the beam bottom reinforcement, and the beam reinforcement of the beam reinforcement is suspended between the columns, By attaching and fixing the beam to the beam main reinforcement of the orthogonal beam, the assembly process can be saved.

Also, the swirl bar of the beam lower main bar of the beam rebar is bent downward, while the swirl bar of the beam upper bar and the beam lower bar of the orthogonal beam are bent upward. Do not touch each other within.

Further, by setting the length of the main bar of the beam to be swallowed into the column at D / 2 or less with respect to the width D of the column, the beam can be formed so as not to come into contact with the swallowing bar from the adjacent span.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a beam reinforcing bar 10 in a method of assembling a reinforcing bar of a reinforced concrete beam according to a first embodiment of the present invention.
It is a side view of the beam bottom main reinforcement 11 of FIG. As shown in FIG. 2, the length of the main bar 11 at the lower end of the beam of the beam reinforcing bar 10 is obtained by adding the swallowing length into the column to the distance between the adjacent columns 20, 20, and the swallowing length into the column. With respect to the width D of the pillar 20 by D /
The number is set to 2 or less so as not to come into contact with the swirling reinforcing bar from the adjacent span. Also, a mesh-shaped U-shaped stirrup 12 is provided on the beam lower main bar 11 of the beam reinforcing bar 10.
Are attached, and the area is formed substantially equal to the distance between the adjacent columns 20, 20. Furthermore, beam reinforcing bars 10
Both ends 13 of the lower main bar 11 of the beam, that is, a portion of the swirling reinforcing bar are formed in an L-shape bent downward.

As shown in FIG. 2, the beam lower reinforcing bar 11 of the beam reinforcing bar 10 thus processed is
It is bridged between adjacent columns 20, 20 having column hoops 22 attached thereto, and both ends 13 of the beam bottom main bar 11 are respectively locked to the column hoops 22.

In the present invention, an orthogonal beam 30 as shown in FIG. 3 is assembled on the beam lower main bar 11 of the beam reinforcing bar 10.

The orthogonal beam 30 comprises a beam upper main bar 31 and a beam lower main bar 32 as shown in FIGS. The length is obtained by adding the swallowing length into the pillar to the distance between the adjacent pillars 20, 20. The swallowing length into the pillar is, as shown in FIG. D '
/ 2 or less so as not to come into contact with the swirling rebar from the adjacent span. As shown in FIG. 3, a mesh-shaped stirrup 33 is attached to the outer periphery of the orthogonal beam 30, and the length thereof is substantially equal to the distance between the columns 20. Further, both ends 34 and 35 of the beam upper main bar 31 and the beam lower main bar 32, that is, the swirling reinforcing bar portion are formed in an L-shape curved upward.

When the orthogonal beam 30 is placed on the main bar 11 at the lower end of the beam, the swirling bar is bent upward, so that it does not come into contact with the beam bar 10 in the column. . Thereafter, the column hoop bar 22 is attached to the column main bar 21 where the orthogonal beam 30 is placed (see FIG. 4).

After that, the beam upper main bar 14 of the beam reinforcing bar 10 as shown in FIG.

The length of the main bar 14 at the upper end of the beam is obtained by adding the swallowing length into the column to the distance between the columns 20, and the swallowing length into the column is D / 2 with respect to the width D of the column 20. As mentioned above,
It is formed so as to overlap with the swirling rebar from the adjacent span. Further, a mesh-shaped U-shaped stirrup 15 is attached to the main beam upper reinforcement 14, and the length thereof is formed substantially equal to the distance between the adjacent columns 20, 20. In addition, the end of the beam upper main bar 14 attached to the pillar located at the end is constituted by an anchor portion 16 bent downward.

The main beam upper reinforcement 14 thus formed is
As shown in FIG. 6, the beam is suspended between the columns 20, 20 at every span, the end of the beam upper main bar 14 is superimposed on the upper end of the beam upper main bar 31 of the orthogonal beam 30, and attached and fixed with a lap joint.

FIG. 9 shows another embodiment of the present invention. In this embodiment, the beam upper main bar 31a and the beam lower main bar 32a of the orthogonal beam 30a are separately constructed. That is, the beam upper main bar 31
The inverted U-shaped stirrup 36 is attached to a, and the U-shaped stirrup 37 is attached to the beam bottom main reinforcement 32a. In addition, it is preferable that the stirrups 36 and 37 have a mesh shape as necessary.

After the beam lower main bar 32a of the orthogonal beam 30a thus formed is placed on the beam lower bar main bar 11, the beam upper bar main bar 14 is hung between the columns 20, 20 every span.
Further, the beam upper main bar 31a of the orthogonal beam 30a is placed on the beam upper main bar 14, the end of the beam upper main bar 14 is overlapped with the lower end of the beam upper main bar 31a of the orthogonal beam 30a, and attached and fixed with a lap joint. .

As described above, the beam upper main bar 31 of the orthogonal beam 30a is provided.
The work of suspending the beam upper main bar 14 between the columns 20 becomes easier by dividing the a and the beam lower main bar 32a. Other configurations and operations are the same as those of the first embodiment.

It is needless to say that the rebar may be assembled either before or after assembling the beam and slab formwork.

[0027]

As described above, in the method of assembling the reinforcing steel of the reinforced concrete beam according to the present invention, the construction can be simplified by assembling the beam reinforcing steel and the beam reinforcing steel of the orthogonal beam for each span.

When the orthogonal beam is placed on the main bar at the lower end of the beam, the swirling reinforcing bar is bent upward.
Also, the problem that when the reinforced beam is dropped into the column without contacting the beam reinforcing bar, the column does not contact the main bar and does not drop smoothly is solved.

Furthermore, since the joint of the beam main reinforcement does not require pressure welding or the like by using a lap joint, the work of arranging the reinforcement on the slab can be greatly reduced, and a large labor saving can be achieved. Can be shortened,
Further, an excellent effect that workability is improved is exhibited.

[Brief description of the drawings]

FIG. 1 is a side view of a beam bottom main bar of a beam reinforcing bar according to a first embodiment of the present invention.

FIG. 2 is a side view showing a state in which a main bar at the lower end of the beam of the beam reinforcing bar is stretched between columns.

FIG. 3 is a sectional view of an orthogonal beam.

FIG. 4 is a side view showing a state where an orthogonal beam is placed in FIG. 2;

FIG. 5 is a side view of a beam upper main bar of the beam reinforcing bar.

FIG. 6 is a side view showing a state where a beam upper main bar is attached to FIG. 4;

FIG. 7 is a sectional view of an orthogonal beam.

FIG. 8 is a partially enlarged side view of FIG. 7;

FIG. 9 is a side view showing another embodiment of the present invention.

[Description of sign]

 DESCRIPTION OF SYMBOLS 10 Beam rebar 11 Beam main bar 12 U-shaped stirrup 13 Both ends 20 Column 21 Column main bar 22 Column hoop bar 30 Orthogonal beam 31 Beam upper main bar 32 Beam lower main bar 33 Stirrup 34, 35 Both ends

Claims (2)

(57) [Claims] 1. An assembling method for attaching a reinforcing bar of a reinforced concrete orthogonal beam to a pillar portion, wherein a U-shaped stirrup is attached to a beam lower main bar of the beam reinforcing bar, and both ends of the beam lower main bar are bent downward. The L-shaped end is spanned between columns, the lower main bar of the beam is assembled into a column, and a stirrup is attached to a beam main bar of an orthogonal beam orthogonal to the lower main bar of the beam at the column portion. Both ends are formed in an L-shape curved upward, the orthogonal beam is placed on the main bar at the lower end of the beam, and an inverted U-shaped stirrup is attached to the main bar at the upper end of the beam reinforcing bar. A method of assembling a reinforcing steel bar for a reinforced concrete beam, wherein an upper main reinforcing bar is suspended between columns and attached to a beam main reinforcing bar of the orthogonal beam. 2. A method for assembling a reinforcing steel bar of a reinforced concrete beam according to claim 1, wherein a length of the main reinforcing bar swallowed into the column is set to D / 2 or less with respect to a width D of the column. Reinforced concrete beam assembling method.