JP2955964B2 - Precast reinforced concrete beam-column jointing equipment - Google Patents

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 jointing apparatus.

[0002]

2. Description of the Related Art Heretofore, the reinforcement at a beam-column joint of this type has been fixed by bending the upper end of the beam through the upper end of the beam and bending the projecting portion of the lower end main reinforcement into the panel zone.

[0003]

In the above-mentioned conventional structure, the lower end of the beam from both sides overlaps in the panel zone, so that it is necessary to increase the beam width due to restrictions on the covering and design restrictions. In addition, there is no degree of freedom in the construction of the beams in the X and Y directions, and the construction plan is restricted. Since the beam width is increased in this manner, member costs and construction costs increase.

[0004] 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 construction cost of a precast reinforced concrete beam-column joint. The point is to provide a device.

[0005]

In order to achieve the above object, a precast reinforced concrete beam-column jointing apparatus according to the present invention has a column main reinforcement for connecting to a column member on an upper floor, which is required to protrude from a column head by a required length. A precast reinforced concrete column with built-in reinforcement bars and hoop bars, with built-in ribs, and all of the lower ends of the beams are mounted with opposing precast reinforced concrete beams bent up before the column center line. The bent-up end of the lower end of the beam is inserted into the panel zone, and a spiral auxiliary hoop is wound around the vertical reinforcing bar in the panel zone, and concrete is poured into the panel zone together with the slab. It is characterized by becoming.

[0006]

According to the present invention, the lower reinforcing bars of the opposing precast reinforced concrete beams are bent up and fixed in front of the column center line without overlapping each other in the panel zone. In this fixing mechanism, when a tensile force acts on the lower end muscle of the beam, a compression strut of concrete is formed obliquely upward from the bending start point.

At the end of the compression strut, the horizontal hoop and the vertical hoop are balanced by an auxiliary hoop streak around the perimeter of the vertical reinforcement in the panel zone and the vertical reinforcement of the column, each having the same amount as the lower end of the beam. resist.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. In the embodiment shown in FIG. 1 and FIG. 2, reference numeral 1 denotes a precast reinforced concrete column, concrete is cast down to the bottom of the beam, and a column main bar 2 and a vertical auxiliary bar 3 are protruded from the column head. In the figure, reference numeral 4 denotes a hoop rein in the panel zone wound around the column main rein 2.

[0009] Precast reinforced concrete column 1
Is built in a predetermined position, and then the protruding end of the beam bottom reinforcement 5 is bent upward before the column center line, and the precast reinforced concrete beam 6 provided with the ribs is mounted on the column capital, and each beam bottom reinforcement is mounted. The bent-up end of No. 5 is fitted into the panel zone. Next, the spiral auxiliary hoop bar 7 is dropped into the panel zone from above, wound around the outer circumference of the vertical auxiliary bar 3 in the panel zone, the beam upper bar 8 is provided, and concrete is placed in the panel zone together with the slab. To join precast reinforced concrete columns and beams.

FIGS. 3 and 4 show another embodiment of the present invention. In this embodiment, the distal end of each beam 6 which fits into the panel zone of the lower end bar 5 adjacent to each other in the beam width direction is narrowed. Thus, the beam width is further reduced.

[00011]

According to the precast reinforced concrete beam-column jointing apparatus of the present invention, as described above, all of the lower end bars of the precast reinforced concrete beams are bent up before the column center line and fitted into the panel zone, so that they overlap. There is no need to increase the beam width. Therefore, the degree of freedom in the construction of the beam can be increased, the construction plan is easy, and the member cost and the construction cost are reduced.

[Brief description of the drawings]

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

FIG. 2 is a plan sectional view of FIG.

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

FIG. 4 is a longitudinal sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Precast reinforced concrete column 2 Column main reinforcement 3 Vertical reinforcement 4 Hoop reinforcement in panel 5 Beam bottom reinforcement 6 Precast reinforced concrete beam 7 Auxiliary hoop reinforcement 8 Beam top reinforcement

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoji Matsubara 4-6-1 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd. (56) References JP-A-62-59708 (JP, A) (58) Investigated Field (Int.Cl. ⁶ , DB name) E04B 1/16-1/22

Claims (1)

(57) [Claims] 1. A precast reinforced concrete column in which a main bar for connecting to a column member on an upper floor is protruded from a column capital by a required length, and a vertical reinforcing bar and a hoop bar are built in, a rib bar is built in, and All mounted opposite precast reinforced concrete beams bent up before the column center line,
The bent-up end of the lower end bar of each beam is fitted into the panel zone, and a spiral auxiliary hoop bar is wound around the outer perimeter of the vertical bar in the panel zone, and concrete is inserted into the panel zone together with the slab. A precast reinforced concrete beam-column jointing device characterized by casting.