JPS6018785B2 - Method for manufacturing reinforced concrete columns or prestressed concrete columns with beam mounting brackets - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Building assembly methods are originally aimed at saving labor, shortening construction time, uniforming quality, and reducing costs accordingly.

However, the current horizontal assembly method for reinforced concrete (hereinafter referred to as R.C.) and prestressed concrete (hereinafter referred to as P.C.) structures requires advanced technology for component manufacturing and assembly work, and the original purpose of the horizontal assembly method is At present, it is not fully utilized. In order to achieve the original purpose of the horizontal assembly method, the present invention is designed to provide R. C pile or P. Focusing on the mechanical strength of C piles as pillars of buildings, we installed one pillar for 3 to 4 floors equipped with specially designed beam mounting brackets to the existing R. C pile or P. This relates to a manufacturing method using C pile manufacturing equipment and formwork.

Currently, P. C pile or R. C piles are manufactured by using spiral bars and reinforcing bars or P. piles in advance as shown in Figure 1. The basket 1 assembled with C steel rods is placed in the formwork 2.
The concrete is filled with concrete, the upper formwork 3 is vertically placed, and centrifugal compaction is performed. In the present invention, one or several steel pipes 10, on the inside of which ribs 11 have been welded in advance as shown in FIG.
centrifugal compaction is carried out in the same manner as the process explained with reference to FIG. 1 above.

When the mold is removed, the R.I. is attached to the belt-shaped steel pipe 10 at several force points as shown in FIGS. 3c, d and 4. C pillar or P.
Pillar C is formed. In FIGS. 3c and 3d, reference numeral 12 indicates concrete, and chain line 13 indicates the reinforcing bar cage portion.

After curing this with autoclape or the like to increase the strength of the concrete in a short time, a beam attachment joint is created by welding the beam attachment flange plate 14 and wave plate 15 to the aforementioned steel pipe 10. Complete (see Figures 5 and 6). In Figure 6, 16 is a beam (Japanese type), 17,
18 indicates a joining plate. The method of attaching the beam to the steel pipe 10' can be modified in various ways, such as by directly welding the beam to the steel pipe. Of course, the configurations of the flange plate, wave plate, and ribs, and the shapes of the concrete columns and steel pipes can also be modified in various ways. Beams are not limited to steel frames, but R. Beams such as C can also be used. Particularly in the present invention, the column-beam joint needs to have sufficient strength so that the steel pipe 10 installed on the column can transmit the force from the beam 16 to the column.

The paddy shearing force transmitted from the beam 16 passes through the steel pipe 10 and is transmitted to the column by the rib 11 pre-installed inside the steel pipe and the adhesive force between the steel pipe inner wall and concrete, several times the depth shearing force that acts on the actual building. I can do it. The concrete inside the steel pipe restrains the deformation of the steel pipe due to the symmetrical or anti-symmetric moment transmitted from the beam, and the steel pipe and concrete work together, so the joint part has a normal radius. C structure or P.
It has several times the yield strength of C structure. As described above, according to the present invention, it is possible to provide a circular or rectangular beam-mounting steel pipe-mounted R.I. which is mechanically sufficiently safe without requiring any new advanced technology. C pillar or P. Three to four floors of the C column can be mass-produced as one unit, making it possible to save labor in assembly work and shorten the construction period.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing steel rods installed in an existing formwork for producing prestressed concrete piles. Figure 2 and the following diagrams explain one embodiment of the present invention.
The figure is a perspective view of the steel pipe for beam attachment installed in the formwork. Figure 3 a is a perspective view of the steel pipe for beam attachment, b is a sketch of the inside of the steel pipe for beam attachment, and c and d are longitudinal and cross-sectional views of a reinforced concrete column or prestressed concrete column equipped with the steel pipe for beam attachment. be. Figure 4 shows an example of a column with a steel pipe for attaching a beam and a brace for attaching a beam to the column, Figure 5 a is a sketch of the column when it is welded together, and b is a.
It is an enlarged view of. FIG. 6 is a diagram showing an example of the beam attachment method, in which a is a perspective view, b is a side view, and c is a plan view. 1...
・Reinforcement cage, 2...Formwork, 3...Upper formwork, 10・
...Steel pipe, 11...Rib, 12...
Concrete, 13...Reinforced cage (shown by chain line),
14... Flange plate, 15... Wave plate, 16... Beam, 17, 18... Joining plate. Figure 21 P. S4 Figure S5 Figure O G Illusion) Gum Shout (b) O C Figure)

Claims (1)

[Claims] 1. One or several simple cylindrical or rectangular cylindrical steel pipes with inner ribs and no external protrusions are installed in a formwork before pouring concrete columns, and the columns for one or several floors are built at once using the centrifugal compaction method. A method of manufacturing a reinforced concrete column or a prestressed concrete column by welding manufactured beam attachment fittings to the steel pipe.