JPH05331943A - Joining method of beam and girder in rc rigio frame - Google Patents

Abstract

PURPOSE:To reduce man-days and number of workers at a job site and to relieve the labor required for transport and clearing away of materials. CONSTITUTION:A steel frame beam 3 is supported by making its end bite a little into a side of a girder form 2 which is supported by timbering 1, and a deck plate 4 is installed as a slab form on the beam 3. Then, a stud bolt 5 is protrudingly installed through the deck plate 4 on the upper end of the steel frame beam 3, and after girder reinforcing bars 6 and a slab reinforcing bars 7 are arranged within the girder form 2 and over the deck plate 4, concrete 8 is monolithically placed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining a small beam and a large beam in an RC rigid frame structure.

[0002]

2. Description of the Related Art In the conventional method of joining beam and beam in RC frame structure, both beam and beam are integrally molded with cast-in-place concrete. It is generally practiced that the slab formwork is supported by the support work and built in one body, the reinforcing bars are arranged, and then the concrete is placed in one body.

[0003]

In the conventional construction method described above, in the construction part of the beam and the slab, the amount of work on site and the amount of support work are large, requiring a large number of man-hours and workers on site, and There was a defect that it took time to move and clean up.

Further, since the small beams as well as the large beams are manufactured on-site, there is a problem in that the quality tends to vary.

[0005]

According to the present invention, a girder steel frame 3 is supported on the side surface of a girder formwork 2 supported by a support structure 1 by supporting the girder steel frame 3 with its end slightly digging into the girder formwork 2. A deck plate 4 is laid as a slab form on the steel frame 3, a stud bolt 5 is projecting through the deck plate 4 at the upper end of the beam girder steel 3, and a girder rebar is provided inside the girder form 2 and on the deck plate 4. The present invention proposes a method for joining a small beam and a large beam in an RC rigid frame structure in which concrete 6 and slab reinforcing bars 7 are laid out and then concrete 8 is integrally cast.

[0006]

[Operation] By using the beam as a steel frame and adopting the deck plate for the slab formwork, the number of the beam and slab support and the formwork can be reduced, and the man-hours and the manpower can be reduced.

Since the end portion of the beam is integrated with the concrete of the beam and the upper end is supported by the slab via the stud bolt, the beam is stably installed and fixed with sufficient strength.

[0008]

EXAMPLE First, as shown in FIG. 3, a girder support 1 is installed, a girder form 2 is set on the girder support 1, and a girder steel frame 3 made of I-shaped steel or the like is attached to the side surface thereof as shown in FIG. To support.

As shown in FIGS. 1 and 2, the beam girder steel 3 is formed by cutting out the lower end of the end and fixing the support flange 3b to the upper end of the notch 3a by welding or the like to form the small edge 3c. The small edge 3c is bitten into the girder form 2 by about 50 mm and supported by the girder support 1.

Next, as shown in FIG. 5, a deck plate 4 is laid as a slab form on the beam girder 3 and spot-welded at a required portion to fix the beam to the beam girder 3, and as shown in FIG. At the upper end of the beam girder steel 3, a stud bolt 5 is projected through the deck plate 4.

As shown in FIGS. 6 and 7, the girder form 2
After arranging the girder rebar 6 and the slab rebar 7 inside and on the deck plate 4, concrete 8 is cast integrally to construct an RC rigid frame structure in which the girder 9, the girder steel frame 3 and the slab 10 are integrated.

[0012]

As described above, according to the present invention, the beam is made of steel and the deck plate is adopted for the slab formwork, so that the beam and slab support and the number of formwork are small, and the man-hours and the work are reduced. The number of personnel can be reduced, and the labor of moving and cleaning up the materials can be reduced.

Further, the slab portion can be installed easily as a slab form (no complicated metal parts are required) because the deck plate is placed on the girder steel frame and spot welding is performed at a required position.

Since the end portion of the beam is integrated with the concrete of the beam and the upper end is supported by the slab via the stud bolt, it is stably installed and fixed with sufficient strength (results of the fracture test show that It was found that a shear stress of up to 35 tons is possible).

Further, since the girder steel frame is processed in a factory, the uniformity as a product can be maintained, and on-site mounting can be sufficiently handled by a carpenter of a form, and it is not necessary to arrange a steel frame work.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a joint portion between a girder and a girder steel frame constructed according to the present invention.

FIG. 2 is a vertical cross-sectional front view of a girder steel frame portion according to the present invention.

FIG. 3 is a vertical sectional side view showing one embodiment of a construction process of the present invention.

FIG. 4 is a vertical sectional side view showing another embodiment of the construction process of the present invention.

FIG. 5 is a vertical sectional side view showing another embodiment of the construction process of the present invention.

FIG. 6 is a vertical sectional side view showing another embodiment of the construction process of the present invention.

FIG. 7 is a vertical sectional side view showing another embodiment of the construction process of the present invention.

[Explanation of symbols]

 1 girder support 2 girder formwork 3 girder steel frame 3a notch 3b support flange 3c small edge 4 deck plate 5 stud bolt 6 girder rebar 7 slab rebar 8 concrete 9 girder 10 slab

Claims (1)

[Claims] 1. A beam girder frame is supported on a side surface of a girder form supported by a supporting structure by supporting the girder frame with its end slightly bited into the girder form, and a deck plate is laid as a slab form on the beam girder frame. Then, project stud bolts through the deck plate at the upper end of the girder steel frame, arrange the girder rebar and slab rebar in the girder formwork and on the deck plate, and then pour concrete integrally. A method of joining a small beam and a large beam in an RC rigid frame structure.