JPH05263491A - Beam and floor structure - Google Patents

Abstract

PURPOSE:To make a steel plate as a bearing material by arranging reinforcing bars inside of the steel plate of a closed section or a U-section, filling concrete in a beam from an opening of an upper side or a side upper part, positioning a beam upper part in a concrete slab and arranging a floor steel plate between side faces of the beam. CONSTITUTION:A beam A is constituted by arranging a reinforcing bar 2 inside of a steel plate 1 of a U-section with its upper part opening and by filling concrete 5 inside of the steel plate 1 from a concrete deposit port 3 of the upper edge of the steel plate 1 or from a concrete deposit port 4 on the upper side surface of the steel plate 1. Thereafter, the upper part of the beam A is positioned inside of a concrete slab B. Thereafter, a reinforcing bar 6 of the slab is positioned and arranged by way of placing it on the upper part or the upper edge of the beam A. Embossing finish is applied to the side surface of the steel plate 1 as required. Additionally in some cases, integrating the beam and the slab are integrated through concrete by way of providing a large number of holes on the side surface upper part of the steel plate 1. Additionally, there is also a case of making the steel plate 1 as a connected square corrugated steel plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam and floor structure related to the combination of a steel plate also serving as a formwork and reinforced concrete.

[0002]

2. Description of the Related Art Various beam floor structures using a steel plate as a permanent form have been developed. And generally, a beam-type steel plate having a U-shaped cross section and a slab floor formwork arranged between the beams are combined, and reinforcement is arranged on the upper part and concrete is placed, but it is difficult to expect the yield strength of the steel plate. Temporary support work is often required.

The present invention was developed in view of the above circumstances, and an object of the present invention is to provide a structure that can withstand a load when pouring concrete without using a temporary material and can use a steel sheet as a structural material. And

[0004]

In the beam and floor structure of the present invention, reinforcing bars are arranged in a steel plate having a closed cross section or a U-shaped cross section having an opening at the upper side, and a concrete pouring port on the upper side or the upper side surface of the steel plate is used. A steel plate filled with concrete, the upper part of the beam is located in the concrete slab, and a steel plate to be the slab bottom is provided between beam side intermediate heights. Further, it may be composed of a square wave steel plate formed by connecting steel plates having a U-shaped cross section.

[0005]

EXAMPLE Beam A has a reinforcing bar 2 arranged in a steel plate 1 having a closed cross section (FIG. 1a) or a U-shaped cross section (FIG. 1b) having an open upper part,
Concrete 5 is filled in the steel plate 1 through the concrete pouring port 3 (FIG. 1 a) on the upper side of the steel plate 1 or the concrete pouring port 4 (FIG. 2 a) on the upper side surface of the steel plate 1. The reinforcing bar 2 in the steel plate 1 is an assembled reinforcing bar in which upper and lower chord members are connected by ribs.
In addition, a plurality of rebars may be assembled.

The upper portion of the beam A is located inside the concrete slab B. Then, the reinforcing bars 6 of the slab are positioned and arranged on the upper part or the upper side of the beam A. The side surface of the steel sheet 1 is embossed if necessary. Also, steel plate 1
There are also cases where a large number of holes are made in the upper part of the side surface of the beam and the beam and slab are integrated through concrete. Further, the steel plate 1 may be a connected square wave steel plate (FIG. 2).

A receiving flange 7 is provided at an intermediate height on the side surface of the beam A, and a steel plate 8 serving as a slab floor such as a keystone plate or a corrugated iron plate is placed on the receiving flange 7 and a slab concrete 9 is poured. .. Further, the receiving flange 7 can be formed by being hung from the connecting plate 10.

Further, the steel plate 1 of the beam A may be separated vertically and combined in addition to the case where one is bent and formed. (Fig. 2a)
It is also possible to apply a tension force to the reinforcing bars 6 in advance to support the steel sheet 1 by connecting it to the steel sheet 1, and to apply prestress to the slab concrete after placing and hardening concrete. It is also possible to tension the reinforcing bar 6 after hardening of the concrete.

A steel plate 8 serving as a floor can also be arranged between the parts of the steel plate 1 (FIG. 2b).

Other modifications are as shown in the drawings. The slab reinforcing bar 6 can also be a mesh reinforcing bar.

A hollow member 11 may be inserted in the upper portion of the steel plate 1 to reduce the weight of the slab.

[0012]

EFFECTS OF THE INVENTION The present invention is constructed as described above, and since the steel plate upper portion of the beam is embedded in the slab concrete, the beam and the slab are surely integrated, and a floor structure composed of the beam and the slab is formed. Can be made smaller. Further, since reinforcing bars and concrete are arranged in the steel plate of the beam, and the steel plate can be used as a load bearing material, the floor and beam strength are remarkably improved.

[Brief description of drawings]

FIG. 1 (a) and (b) are longitudinal sectional views in an embodiment of the present invention.

2 (a) and 2 (b) are vertical sectional views of another embodiment of the present invention.

3 (a) (b) (c) (d) in another embodiment of the beam portion of the present invention.
(e) (f) (g) (h) are perspective views of beam steel sheets of different examples.

FIG. 4 (a) (b) (c) in another embodiment of the beam portion of the present invention.
(d) (e) (f) are perspective views of different embodiments.

[Explanation of symbols]

A ... Beam, B ... Slab 1 ... Steel plate, 2 ... Reinforcing bar, 3, 4 ... Concrete pouring port, 5
... concrete, 6 ... rebar, 7 ... receiving flange, 8 ... steel plate, 9 ... slab concrete, 10 ... connecting material, 11 ... hollow material.

Claims (3)

[Claims] 1. A beam comprising reinforcing bars arranged in a steel plate having a closed cross section or a U-shaped cross section having an opening at the top, and concrete is filled into the steel plate from a concrete pouring port on the upper side or upper side surface of the steel plate. A beam and floor structure, wherein the upper part of the beam is located in a concrete slab. 2. The beam and floor structure according to claim 1, wherein a steel plate serving as a slab bottom is provided between beam side intermediate heights. 3. The beam and floor structure according to claim 1, wherein the U-shaped cross-section steel plates having an upper opening are connected to each other and are made of square-angle corrugated steel plates.