JPH06322821A - Construction of column-beam connecting part - Google Patents

Abstract

PURPOSE:To facilitate the connection between column and beam of reinforced concrete construction. CONSTITUTION:Reinforced concrete beams 3 in four directions of a connecting part are integrated together in the state where they are arranged nearly in cross to form a precast body 5 having a through-hole 4 for passing the reinforcements 2a of a reinforced concrete column 2 in the cross part. In the inner part of the through-hole 4, a number of reinforcements 3a of each reinforced concrete beam 3 are protruded and exposed in the crossed state, and the reinforcements 2a of the reinforced concrete column 2 can be inserted thereto. Further, after the reinforcements are inserted into the through-hole of the precast body 5, concrete is placed to connect and integrate the column 2 to the beams 3. By connecting each beam 3 to the column 2 in the cross part of the 3 in the precast body 5, rationalization such as reduction in assembling of reinforcements, increase in diversion of molds, and reduction in number of assembling processes is attained to enhance safety and reduce cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a joint between a column and a beam in a reinforced concrete structure, a so-called column-beam joint structure.

[0002]

2. Description of the Related Art Conventionally, as a pillar-beam joint structure of this type, a mold is installed in the shape of the joint for the pillar and the beam, and the pillar and the beam in the reinforced concrete structure are installed in the mold. It is generally known that reinforcing bars are arranged in order to do so, and then concrete is placed in each of the molds.

In this column-beam joint structure,
Various rationalization has been made by prefabricating rebars and increasing the size of formwork.

[0004]

However, in the conventional column-beam joint structure as described above, the rationalization is not sufficient, and the formation of the joint is troublesome and time-consuming. Therefore, it was not possible to easily join columns and beams in reinforced concrete construction.

The present invention was devised in view of the above circumstances, and an object thereof is to provide a column-beam joint structure capable of easily joining columns and beams in a reinforced concrete structure.

[0006]

According to the joint structure of the present invention, the four-sided, three-sided or two-sided reinforced concrete beams in the joint are preliminarily substantially cross-shaped, substantially T-shaped or substantially L-shaped.
The precast body is integrated in a state of being arranged in a letter shape, and has a through hole through which the reinforcing bar of the reinforced concrete column penetrates at the intersection thereof. Further, inside the through-hole in the precast body, the reinforcing bars of each reinforced concrete beam are projected and exposed in a state where a large number of them intersect, and the reinforcing bars of the reinforced concrete column are formed so that they can be inserted. Furthermore, the reinforced concrete columns and the reinforced concrete beams are joined and integrated by inserting concrete into the through holes of the precast body and then placing concrete.

The present invention is one step further from the conventional joint structure, and the reinforced concrete beam is made into a substantially cross-shaped, substantially T-shaped or substantially L-shaped precast body in which the panel zone of the reinforced concrete column is devised. In the precast body, at the intersection of each beam, by the method of joining to the column, the ratio of assembling the rebar, increasing the diversion of the formwork, reducing the number of assembling steps is rationalized, and safety and cost reduction are required. is there.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The pillar / beam joint structure of the present invention will be described below with reference to the illustrated embodiments. In this example,
The joint structure of reinforced concrete columns and four-sided reinforced concrete beams in this reinforced concrete column is described.

The joint structure 1 (see FIGS. 1 to 3) for joining the reinforced concrete columns 2 and the four reinforced concrete beams 3 in the reinforced concrete columns 2 has the four reinforced concrete beams 3 at the joints in advance. A precast body 5 is formed by forming through holes 4 through which the reinforcing bars 2a of the reinforced concrete columns 2 penetrate at the intersections of the reinforced concrete beams 3 while integrating them in a substantially cross shape.
Further, the inside of the through hole 4 in the precast body 5 is formed so that the reinforcing bars 3a of each reinforced concrete beam 3 project and are exposed in a state where a large number of them intersect each other, and the reinforcing bars 2a of the reinforced concrete columns 2 can be inserted. ing.

Then, the reinforced concrete column 2 and the reinforced concrete beam 3 are joined and integrated by inserting concrete into the through hole 4 of the precast body 5 after inserting the reinforcing bar 2a of the reinforced concrete column 2. Has become.

The precast body 5 in this embodiment
As shown in FIG. 2 and FIG. 3, each of the reinforced concrete beams 3 has four upper end bars 6 and seven lower end bars 7, which are the bar arrangements 3a.

As shown in FIG. 2 and FIG. 3, the inside of the through hole 4 of the precast body 5 is the upper end bar 6 and the lower end bar 7, that is, the bar arrangement 3a of each reinforced concrete beam 3.
Are exposed and intersect with each other, and a hoop muscle 8 as a shear reinforcing muscle is provided.

Further, at the joints of the reinforced concrete columns 2 with the respective reinforced concrete beams 3, four bar arrangements 2a are provided at the corners in the cross section of the reinforced concrete columns 2. And each bar 2a is
The precast body 5 is arranged so as to be inserted into the through hole 4 of the precast body 5.

To describe the case of joining columns and beams using the joint structure 1 having such a structure, first, for concrete use, concrete reinforced concrete columns 2 are formed up to the bottom of the beams.

Next, an approximately cross-shaped precast body 5 shown in FIGS. 2 and 3 in which the respective reinforced concrete beams 3 intersect each other is prepared on site. At the time of this creation, the through holes 4 are formed in the hoop muscles 8 at the intersections of the reinforced concrete beams 3,
It is formed into a cavity by using an outer lath stopper or an inner sand airbag stopper method.

Next, the precast body 5 prepared on site as described above is lifted by a crane (not shown) and is hung from the upper part of the reinforced concrete column 2 as shown in FIG. 1 (b). The precast body 5 is set on the reinforced concrete pillars 2 so that the reinforcing bars 2a of the reinforced concrete pillars 2 are located inside the through holes 4 of the precast body 5 (see FIG. 1 (a)) during the suspension. .

Then, concrete is placed in the through hole 4 of the precast body 5 into which the reinforcing bar 2a of the reinforced concrete column 2 is inserted. Then, when the concrete poured into the through holes 4 hardens, the reinforced concrete columns 2
And the reinforced concrete beams 3 arranged in a cross shape are joined.

In this way, according to the pillar / beam joint structure 1 of the present invention, the reinforced concrete pillars 2 and beams 3 can be easily joined.

[0019]

According to the joint structure of the present invention, each reinforced concrete beam arranged in a cross shape, a T shape, or an L shape is made into an integral precast body, so that formwork assembly, rebar arrangement, etc. It is possible to easily connect the reinforced concrete column and each reinforced concrete beam, such as reducing the on-site work.

Moreover, the fact that each reinforced concrete beam is used as a precast body and can be easily joined to a reinforced concrete column also increases the safety of work.

Further, it is possible to reduce the on-site work of the reinforcing bar and reduce the assembly cost by 20%. In addition, the diversion of the formwork can be increased, and the formwork cost can be reduced by 30%. In addition, labor costs are 20% due to the utilization of multi-purpose workers for rebar and formwork.
Can be reduced.

[Brief description of drawings]

FIG. 1A is a schematic perspective view showing a pillar / beam joint structure of the present invention, and FIG. 1B is a schematic perspective view showing a state before joining in the pillar / beam joint structure of the present invention.

FIG. 2 is a plan view showing a precast body in the pillar / beam joint structure of the present invention.

FIG. 3 is a view taken along the line AA of FIG.

[Explanation of symbols]

1 ... Joint structure, 2 ... Reinforced concrete column, 2a ... Bar arrangement,
3 ... Reinforced concrete beam, 3a ... Bar arrangement, 4 ... Through hole, 5 ...
Precast body, 6 ... upper end streak, 7 ... lower end streak, 8 ... hoop streak.

Claims (1)

[Claims] 1. A joint structure used for joining a reinforced concrete column and a four-way, three-way or two-way reinforced concrete beam in the reinforced concrete column, wherein the four-way, three-way or two-way reinforced concrete beam in the joint is previously formed. A precast body that is integrated in a state of being arranged in a substantially cross shape, a substantially T shape, or a substantially L shape, and that has a through hole through which the reinforcing bar of the reinforced concrete column penetrates at the intersection thereof. The inside of the through-hole in the precast body is formed so that the reinforcing bars of each reinforced concrete beam project and are exposed in a state where a large number of them intersect, and the reinforcing bars of the reinforced concrete column can be inserted into the through hole. And reinforced concrete beams, inside the through-hole of the precast body, the reinforcement of the reinforced concrete column A column-beam joint structure characterized by joining and integrating by inserting concrete after inserting.