JPS6037347A - Pillar and beam connecting structure in reinforced concrete structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION In a reinforced concrete rigid frame structure, the joints between columns and beams must be rigidly connected by the anchoring effect of the ends of the beam main reinforcements. For this reason, the reinforcing bars used for the main beam reinforcement are limited to those with a certain diameter (25 wm) or less due to bending workability and the strength of reinforced concrete adhesion stress. Therefore, when using large diameter reinforcing bars as beam main reinforcements,
New ingenuity is required for the column-beam joints.

The present invention was proposed to meet such demands, and includes disposing a shaped steel at the center of a column constituting a reinforced concrete rigid frame structure, making the main reinforcement of the beam that intersects with the stud penetrate through the shaped steel, This invention relates to a column-to-beam joint structure in a reinforced concrete structure, characterized in that the main beam reinforcement is anchored to both sides of the shaped steel by sandwiching it through an anchoring device.

In the present invention, as described above, a shaped copper such as an H-shaped steel or a steel pipe is arranged in the center of a column constituting a reinforced concrete frame, and the main reinforcement of the beam is passed through the same shaped steel, and sleeves for cold crimp joints and screws are installed. Since the shaped steel is clamped and firmly anchored to both sides of the shaped steel via an anchoring tool such as an anchoring nut for a jointed deformed steel bar, the beam main reinforcement of a sufficiently large diameter can also be firmly joined and anchored to the shaped copper.

As a result, the stress in the beam is effectively transmitted to the column via the shaped steel, making it possible to integrate and rigidly connect the column and beam joints.

The present invention will be described below with reference to the illustrated embodiments.

As shown in Figure 1, an H-shaped steel (
4) is erected, and after fixing the tops of the H-type steel by connecting temporary head connecting members (B) between the tops of each H-type steel to maintain verticality, the foundation beams (C) are constructed using the conventional construction method.

Note that the H-shaped steel (4) has a length of one section approximately equal to the height of 6 stories.

Next, as shown in Fig. 2, the main reinforcement (E) of the beam, on which the cold crimp joint sleeve (D) has been attached in advance, is passed through the through hole drilled in the H-shaped steel (4) to connect the adjacent beam. The main reinforcement (E) is joined by pressure welding or the like to form a continuous beam main reinforcement. In the figure (
W) indicates the joint location of the main beam reinforcement (E).

Next, the cold crimp joint sleeve (D), which has been previously attached to the beam main reinforcement (F), is crimped to the beam main reinforcement (E) at a position where it contacts the outer surface of the H-beam flange or web (see Figure 6). ) Assemble the column reinforcement such as the longitudinal reinforcement (G1) and hoop reinforcement (G2) on the outside of the column, and the beam reinforcement such as the cost reinforcement (H) that connects the upper and lower main reinforcement of the beam (see Figure 4). Next, as shown in FIG. 5, after pouring concrete (I) and (J) for the columns and beams, the reinforcing bars for the upper floor are assembled in the same order as above. Next, the temporary head connecting material (B) of the first section indicated by the dotted line in Figure 6
The reinforced concrete structure is constructed by repeating the same steps as above, such as assembling the H-shaped steel Buddha (2nd section and above) and arranging the temporary head connecting material (B).

Figures 7 and 8 show details of the joint between the inner column and the beam,
The cold crimp joint sleeve (D) attached to the beam main reinforcement (El) penetrated through the through hole drilled in the flange (1) and web (2) of the H-shaped steel frame is attached to the outer surface of the flange (1), respectively. And on both sides of the web (2), press the beam main reinforcing bars (El) so that they come into contact with the H-shaped steel (A) from the outside at the position where they are sandwiched between them.
Main beam reinforcement (flange (1) and web of H-shaped steel frame)
2).

Therefore, the stress in the beam is greater than the beam main reinforcement fEJ due to cold crimping.
It is effectively transmitted to the column via the H type steel cage as well as the (D),
It is possible to integrate and rigidly connect the column and beam joints.

FIG. 9 shows a beam-to-column joint in the outer column part, and parts in the figure that are equivalent to those in the previous figures are designated by the same reference numerals (X,).

Fig. 10 shows the anchoring part of the beam main reinforcement (the H-shaped steel (A)) by the cold crimping sleeve (D).

Figure 11 shows a case where an anchoring nut (D') for threaded deformed steel bar is used instead of the cold crimping sleeve (D). screwed on,
It is anchored to the outer surface of the H-shaped steel fAl.

Fig. 12 and Fig. 13 show a steel pipe α instead of the above-mentioned shaped steel (4).
The sleeve for cold crimp joints (D) or the anchor for screw connections is attached to the beam main reinforcement (E) that passes through the through hole drilled on the outer peripheral surface of the steel pipe (A”). The main beam reinforcement (R) is firmly anchored to the steel pipe (A) by anchoring the anchoring nut in contact with the outer peripheral surface of the steel pipe (A').

In the figure, parts equivalent to those of the above embodiment are given the same reference numerals.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of drawings]

1 to 6 are front views showing construction steps of a reinforced concrete structure having a beam-column joining device according to the present invention, and FIG.
8 and 8 are a longitudinal sectional front view of the right half and a longitudinal sectional front view of the right half, respectively, showing the case where the present invention is applied to the column-beam joining device for the inner column portion, and FIG. 9 is the column-beam joint for the outer column portion. 10 and 11 are cross-sectional plan views of the right half showing the case where the present invention is applied to the device.
The figure is a side view showing the anchorage of the shaped steel and the main beam reinforcement, respectively.
This figure and FIG. 13 are a cross-sectional plan view and a right-half longitudinal cross-sectional front view showing still another embodiment of the present invention, respectively. (A)...Shaped steel, (f)...Steel pipe, (Sleeve for cold crimp joints, (D')...Anchoring nut for threaded deformed steel bar, (8)... Liang Chinsuji Agent Patent Attorney Okamoto 1 6 outsiders Figure 1 Figure 2 Figure 3 Figure 4 Figure 7 Figure 8

Claims (1)

[Claims] A shaped steel is placed in the center of the column that makes up the reinforced concrete two-men structure, and the main reinforcement of the beam that intersects with the stud is passed through the shaped steel, and the main reinforcement of the beam is placed between the shaped steel via an anchoring device and attached on both sides. A column-beam joint structure in a reinforced concrete structure characterized by being anchored to a surface.