JPH0692669B2 - Frame method using shaped steel for beam with rebar concrete structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a framing method using shaped steel for a beam of a reinforced concrete structure.

For buildings with reinforced concrete structures, the cast-in-place concrete method is generally used, and large and small beams of reinforced concrete (hereinafter referred to as RC) are combined.
The floor slab is built as one.

"Problems to be solved by the invention" However, in this case, since the formwork is assembled and reinforced in the entire building at the site, there are many on-site work processes such as carpentry and reinforcing bar work, and the construction period is long. At the same time, it is difficult to secure work flow lines because temporary support is required.

Therefore, the present invention relates to precast concrete (hereinafter PC
By attaching a small beam of shaped steel to the large beam (a) and using a deck plate for the floor slab, it is possible to reduce on-site work, shorten the construction period, reduce the weight of the building, and save labor for temporary support. It aims to reduce the cost by reducing the processing of steel beam.

`` Means for solving the problem '' The present invention, RC or PCa columns constructed up to the bottom of the beam, a PCa girder is erected, the girder is preformed with appropriate notches at appropriate positions on the side, A small beam of shaped steel whose both ends are cut vertically is fitted into the notch at its ends, and the remainder of the notch is filled with concrete to be fixed to the girder. It is a method of laying a deck plate on the beam and placing concrete on the slab.

"Operation" With the above-mentioned configuration, it is possible to effectively operate factory production and on-site construction, and to obtain a building with a strong reinforced concrete structure and achieve the intended purpose.

"Embodiment" The drawings are embodiments of the present invention, in which Fig. 1 shows a process, and Figs. 2 to 9 show a concrete structure of an essential part.

Explaining the process shown in Fig. 1, I. Construct RC columns 1 ... under the beam at the site. Pillars 11 ...
Is a sufficiently long one, and a hoop is assembled to the bottom of the beam, and pillar concrete 12 ... is placed.

II. Build PCa girders 2 ... on the RC columns 1 ... Specifically, as shown in FIGS. 2 and 3, the end of the PCa girder is placed on the edge of the column, and the lower beam main bar 21 ... Incorporate into the column rebar. At this time, in the column rebar, the hoop 13 is attached to the protruding column main bar 11 ...
Build a ... The PCa girders are, of course, produced by the factory, but they are constructed as a semi-finished product with the upper part of the stalaps 22 ... Exposed, and the notches 23 ...

As shown in FIGS. 4 and 5, the notch 23 ...
, The beam H of H-section steel whose both ends are just cut vertically is fitted at its ends and incorporated, and the remaining part of the notch is filled with concrete 24 and fixed. The beam 3
... are processed in the field, and a large number of headed stud connectors 31 are welded in a row on the upper surface. At the end of the beam 3, a headed stud connector is welded to the web, or a through hole is bored in the web to insert a short rebar, and the notch 23 is filled with concrete 24. You may make it embed in.

III. Above the large beam 2 ... to the small beam 3 ..., on the deck plate 4
Lay out ... The deck plate has ribs 41 ... As shown in FIGS. 6 and 7, and the ribs are gradually lowered at the end so that the end is engaged with the edge of the girder or beam. .

IV. Above the girders 2 ..., the girder upper bars 25 ... are arranged on the stirrup 22 ... (Figs. 2, 4, and 5), and the required bars are arranged on the deck plate 4 ... , Placing the slab concrete 5 and integrating all (Fig. 8, Fig. 9
Figure). At this time, the concrete part of the pillar is also filled with concrete.

[Advantages of the Invention] According to the present invention, since the beam is a shaped steel in which both ends are vertically cut, it can be easily processed on site and the number of processing steps is small, so that the cost can be reduced. Further, since it is not necessary to process the shaped steel in the factory, it is possible to carry out from ordering to field installation in a short time.

In addition, the number of man-hours, job types, and personnel at the site can be reduced, the construction period can be shortened, and temporary support is not required, which improves workability at the site, reduces the generation of residual materials and unnecessary materials, and cleans and cleans up. Is less.

Further, the weight of the building can be reduced.

[Brief description of drawings]

The drawings are embodiments of the present invention, and FIGS. 1 to IV are process explanatory views, FIG. 2 is a vertical side view of a column / beam joint, and FIG. 3 is a transverse plan view thereof. The figure shows a cross-sectional side view of the girder / girder joint, Fig. 5 shows the same vertical section, Fig. 6 shows the girder / deck plate plan view, and Fig. 7 shows the girder / deck plate plan view. FIG. 8 is a cross-sectional view of a cross beam / deck plate / slab, and FIG. 9 is a cross-sectional view of a cross beam / deck plate / slab. 1 ... RC column, 2 ... PCa large beam 3 ... H-beam small beam, 4 ... Deck plate 5 ... Floor slab concrete

Claims (1)

[Claims] 1. A precast concrete girder is erected on a pillar constructed up to the bottom of the girder, and appropriate notches are previously formed at appropriate places on the side faces of the girder, and both ends are cut vertically to the notch. The shaped beam of the steel is fitted at its end, the remaining part of the notch is filled with concrete and fixed to the girder, and a deck plate is laid on the girder or the girder. Frame method using shaped steel for beam of reinforced concrete structure characterized by casting