JPS6347857B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a joint structure between, for example, a precast concrete beam and a cast-in-place steel reinforced concrete column.

Conventionally, the beam main reinforcing bars and plate material fixed inside the precast beam material were made to protrude from this beam material, and this plate material was joined to a joint steel plate protruding from the H-shaped steel frame column, and further, the flange of the H-shaped steel frame was pre-drilled. A structure is known in which a column and a beam are joined by passing a support reinforcement through a through hole and welding the support reinforcement against the beam main reinforcement (for example, Japanese Patent Publication No. 52-19006).

However, in the prior art, a through hole is drilled in the flange of the steel column, which causes a cross-sectional defect in the steel column, and alignment of the splint reinforcement and the beam main reinforcement is determined by the tolerance of the inner diameter of the through hole drilled in the steel column. This work required an extremely high degree of skill, as it had to be carried out with sufficient consideration in advance of the tolerance of the outer diameter of the reinforcement of the reinforcing bars of different diameters that pass through the through-holes.

Therefore, the present invention eliminates the drawbacks of the prior art, and the feature of the present invention is to provide both a column joint main pipe and a beam joint pipe connected to the beam main reinforcement at a predetermined location of a steel column. It is equipped with a threaded rod that can be screwed into both of the joint pipes at the same time.

Embodiments of the present invention will be described based on the drawings.

In Fig. 1, column joint pipes 3, ..., 3a, ... ...is fixedly protruding in the horizontal direction by groove welding. Joint iron plates 4, 4a are vertically protruded from the end faces surrounded by the column joint pipes 3, . . . , 3a, . If necessary, stiffeners 5, . . . are provided to connect the inner surfaces of the flanges 2, 2a where the column joint pipes 3, . . . , 3a, .

On the other hand, beam main reinforcements 7, . . . at the upper and lower ends protrude from the end faces of the precast concrete beams 6, 6a,
Each main reinforcement has a beam joint pipe 8, as shown in the second figure.
..., 8a, ... are connected by crimping means. The beam joint pipes 8, 8a are in a corresponding positional relationship with the column joint pipes 3, 3a. Also beams 6,6
Joint iron plates 9, 9a are protruded from the end face of a in a positional relationship that allows them to be joined to the joint iron plates 4, 4a of the column 1.

Also, the joint pipes 3,..., 3a,... for columns and beams
. . , 8, . . . , 8a, . and joint pipes 3, 3a
Both ends of a threaded rod 10 are screwed between and 8, 8a to connect both pipes, and this threaded rod introduces torque through nuts 11, 11 to complete the stress transmission of the reinforcing bar joint. ing.

Next, the process of connecting columns and beams according to the present invention will be explained.

First, the joining iron plates 9, 9a of the precast concrete beams 6, 6a are connected to the joining iron plates 4, 4a of the steel column 1, respectively, with bolts. At this time, the column joint pipes 3, ..., 3a, ... are already protruding from the flanges 2, 2a of the steel column 1, and one end of the threaded rod 10 is screwed into each pipe sufficiently deeply. This threaded rod has nuts 11 and 1.
1 are screwed together. Then, while rotating the threaded rod 10, pull it out from the column joint pipes 3, ..., 3a, ..., and attach the tip of this threaded rod to the beam joint pipes 8, 8.
Connect both joint pipes by screwing into the tip opening of a. Finally, rotate the nut 11 to connect the column joint pipes 3, 3 as shown in the second figure.
a and each tip of the beam joint pipes 8 and 8a.

In the above embodiment, the precast concrete beams 6, 6a were connected to the steel column 1.
The present invention is not limited to this, but as shown in the third figure, the beam joint pipes 8 and 8a are pressure-welded in advance to the ends of the main beam reinforcements 7 and 7a, and the column joint pipes 3 and . . , 3a, . . . , and stirrups 12, 12a are wrapped around the beam main reinforcements, and then concrete may be cast on site together with the steel column 1.

Since the present invention has the above configuration, there is no cross-sectional loss in the steel column unlike in the prior art, and since the column joint pipe and the beam joint pipe are connected by a threaded rod, this work does not require skill. It is something that can be done easily.

[Brief explanation of the drawing]

Figure 1 is a slope view, Figure 2 is an enlarged sectional view of the main parts,
FIG. 3 is a perspective view showing another embodiment. 1... Steel column, 2, 2a... Flange, 3, 3
a... Column joint pipe, 6, 6a... Beam, 7, 7a
... Beam main reinforcement, 8, 8a ... Beam joint pipe, 10...
...Threaded rod.

Claims (1)

[Scope of Claims] 1. A column joint pipe that protrudes horizontally and is fixed to a predetermined location on the outer peripheral surface of a steel frame column; A beam joint pipe that is in a corresponding positional relationship with the column joint pipe and connected to the main beam reinforcement; A column-to-beam joint structure consisting of a threaded rod screwed into both joint pipes at both ends.