JPH05306544A - Device for joining precast reinforced concrete column and beam - Google Patents

Abstract

PURPOSE:To improve construction property and reduce cost of members and erection cost. CONSTITUTION:Oppositely disposed precast reinforced concrete beams 6, wherein rib bars are provided and under-beam bars 5 are projected horizontally and then bent upward so that they do not interfere with one another, are mounted on a precast reinforced concrete column 1, wherein column main bars 2 are projected from the top thereof and vertical auxiliary bars 3 and hoop bars 4 in a panel zone are provided. A lower end bar protruding part of each of the beams 6 is inserted into the panel zone and auxiliary hoop bars 7 are wound around the bars 3 in said zone and then concrete is placed in the panel zone together with a slab.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast reinforced concrete beam-column joining apparatus.

[0002]

2. Description of the Related Art Conventionally, the reinforcing bar in this type of beam-column joint has been fixed by bending the upper end bar of the beam through the bar and projecting the beam end projection of the main bar of the lower end into the panel zone.

[0003]

In the above-mentioned conventional structure, since the beam lower end streaks from both sides overlap in the panel zone, it is necessary to increase the beam width due to the regulation of the cover and the restriction on the design. In addition, there is no freedom in erection of beams in the X and Y directions, and erection plans are restricted. Since the beam width is increased in this way, member costs and erection costs increase.

The present invention has been proposed in view of the above-mentioned problems of the prior art, and the object thereof is to improve the workability and reduce the member cost and the erection cost of precast reinforced concrete beam-column joints. The point is to provide a device.

[0005]

In order to achieve the above-mentioned object, a precast reinforced concrete beam-column joining device according to the present invention is provided with a required length projecting from a column main column column head for joining with a column member on an upper floor, and a vertical assist. Precast reinforced concrete columns with built-in reinforcements and hoop reinforcements are mounted with opposite precast reinforced concrete beams that have built-in ribs and are horizontally projected and bent up so that the beam bottom ends do not overlap each other. The projection of the lower end reinforcement of each beam is inserted into the panel zone, the auxiliary hoop reinforcement is wound around the outer periphery of the vertical auxiliary reinforcement in the panel zone, and concrete is placed in the panel zone together with the slab. Is.

[0006]

According to the present invention, since the lower end reinforcements of both precast reinforced concrete beams facing each other are bent and fixed in the panel zone before overlapping without overlapping with each other, this fixing mechanism applies a tensile force to the lower end reinforcements of the beam. At this time, concrete compression struts are formed obliquely upward from the bending-up starting point.

At the end of the same compression strut, in order to balance the horizontal component and the vertical component, the auxiliary hoop reinforcements on the outer periphery of the vertical reinforcements in the panel zone and the vertical reinforcements of the columns in the above-mentioned panel zone are equal in amount to the beam bottom reinforcements. resist.

[0008]

The present invention will be described below with reference to the illustrated embodiments. In the embodiment shown in FIGS. 1 and 2, 1 is a precast reinforced concrete column in which concrete is placed under the beam, and a column main bar 2 and a vertical auxiliary bar 3 project from the column head. Reference numeral 4 in the figure denotes a hoop muscle in the panel wound around the main pillar muscle 2.

Then, the pillar 1 is erected at a predetermined position, then the end of the beam lower end reinforcement 5 is bent upward, and a precast reinforced concrete beam 6 having ribs is placed on the stigma, The bent end of the beam lower end streak 5 is fitted in the panel zone. Next, the spiral auxiliary hoop reinforcement 7 is dropped from above into the panel zone, the beam upper end reinforcement 8 is arranged, and concrete is cast in the panel zone together with the slab to join the precast reinforced concrete column beam.

FIGS. 3 and 4 show another embodiment of the present invention, in which the tips of the beams 6 which are adjacent to each other in the beam width direction and which are fitted in the panel zones of the beam lower end streaks 5 are narrowed to further increase the beam width. Has been saved.

[0011]

Since the present invention is constructed as described above, it is not necessary to increase the beam width because the bent end portion of the beam lower end streak is fitted in the panel zone and does not overlap. The beam can be erected freely, the erection plan is easy, and the material cost and erection cost are reduced.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a precast reinforced concrete beam-column joining apparatus according to the present invention.

FIG. 2 is a plan sectional view of FIG.

FIG. 3 is a vertical sectional view showing another embodiment of the present invention.

FIG. 4 is a plan sectional view of FIG.

[Explanation of symbols]

 1 Precast reinforced concrete columns 2 Column main bars 3 Vertical auxiliary bars 4 Hoop bars in panel 5 Beam bottom bars 6 Precast reinforced concrete beams 7 Auxiliary hoop bars 8 Beam top bars

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Matsubara 4-6-15 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd.

Claims (1)

[Claims] 1. A precast reinforced concrete column having a required length projecting from the column head for connection with a column member on the upper floor and having a vertical auxiliary bar and a hoop bar, and having ribs built therein,
The opposite precast reinforced concrete beams that are horizontally projected and bent up so that the beam bottom ends do not overlap with each other are placed, and the bottom end protrusions of each beam are inserted into the panel zone. A precast reinforced concrete beam-column joining apparatus characterized in that an auxiliary hoop reinforcement is wound around the outer periphery of the vertical auxiliary reinforcement in the panel zone, and concrete is placed in the panel zone together with the slab.