JP2002030755A - Reinforced concrete floor structure using three- dimensional welding built-up reinforcement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforced concrete floor structure allowing an interval between beams 1 to be lengthened by reducing the self-weight of a floor slab, eliminating most of manual work at a job site, enabling a reduction in price and standard production, and serving as a reinforcing material for the floor slab or a supporting metallic material for equipment such as wiring, piping, etc., by exposing a three-dimensional welding reinforcement 2 in a lower part. SOLUTION: In this structure, a concrete slab 3 is laid between the beams 1 made of wide flange shapes, and the top surface of the concrete slab 3 is taken as that of the floor slab. The upper part of three-dimensional welding reinforcement 2 is buried for integral formation in the concrete slab 3 having a thickness t of 4, 7, or 10 cm. The reinforcement 2 is preferably fixed integrally to the top surface of the beam 1 through an approximately S-shaped cross-section jointing fitting though the wave bar of the reinforcement 2 can be made to abut on the flange 11 of the beam 1 and the concrete slab 3 can be directly placed on the top surface of the flange 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced concrete floor structure using a three-dimensionally welded reinforcing steel bar of a low-rise building or a building such as a two- or three-story building, and in particular, a part of a three-dimensionally welded reinforcing bar is embedded in concrete. Using a reinforced concrete slab that has been laid, it is laid to form a reinforced concrete floor structure, and the three-dimensional welded reinforcing bar that projects downward and is exposed serves as a reinforcing material that supports the floor plate and a function of metal fittings for wiring and piping etc. The present invention also relates to a reinforced concrete floor structure having a long beam interval.

[0002]

2. Description of the Related Art FIG. 4 is a view showing a conventional reinforced concrete floor structure using a three-dimensional welded reinforcing bar, which is a concrete plate integrally formed under a three-dimensional welded reinforcing bar (2).
(3) is arranged and laid on the upper surface of the flange (11) between the beams (1) of the H-section steel, and then a U-shaped rebar is drawn out so that the adjacent three-dimensional welded rebar (2) is fixed. The floor plate is formed by placing concrete in such a way that the three-dimensional welded reinforcing bar (2) is completely buried. (H) at this time indicates the thickness of the floorboard,
And (t) shows the thickness of the concrete slab (3), which serves as a formwork. Generally, (h) is 12.0
cm to 16.5 cm, and (t) is from 6.0 cm to 6.5 cm.

[0003]

However, in the conventional reinforced concrete floor structure, when it is necessary to increase the distance (L) between the beams (1), the small beams (1 ') are used and the small beams (1') are used. 1 '), the height of the ceiling was reduced by 20 to 40 cm because of the height of the beam (1'). Also, at this time, if the distance (L) between the beams (1) is increased, the load on the floor plate is increased, and the thickness (h) of the floor plate is increased, and the floor plate itself becomes heavy. Also, at the site, since the entire floor is cast concrete,
There is a problem that it takes time until the concrete solidifies and cures.

An object of the present invention is to provide a reinforced concrete floor structure capable of reducing the weight of the floorboard, increasing the distance between beams, eliminating almost no manual work on site, and enabling price reduction and standard production. .

Another object is that when a reinforced concrete slab is laid, a three-dimensional welded reinforcing bar projecting downward and being exposed serves both as a reinforcing material for supporting a floor plate and as a metal fitting for equipment such as wiring and piping. To provide a reinforced concrete floor structure.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. That is, the upper portion of a three-dimensional welded reinforcing bar is buried between H-beams and integrally formed. It has a structure in which a concrete slab of thickness is laid and the upper surface forms the upper surface of the floorboard. Further, the wave reinforcement of the three-dimensional welded reinforcing bar may be brought into contact with the flange of the H-shaped steel beam, and the concrete plate may be directly placed on the upper surface of the flange. A structure in which the welding rebar is integrally fixed to the upper surface of the flange of the beam made of H-section steel may be used. Especially for concrete slabs, 4cm, 7cm, 10cm
It is good to use the thing of cm according to the use.

[0007]

FIG. 1 is a diagram showing an embodiment of the present invention, which will be described with reference to this drawing. (1) is a beam using an H-shaped steel, and the interval (L) of the beam (1) is as long as about 7 m. The thickness and assembly structure of each reinforcing bar of a three-dimensional welded reinforcing bar (2) described later. The distance (L) is determined by the thickness (t) of the concrete slab (3), the interior design, and the like. (2) Main muscle (21), horizontal muscle (22) and wave muscle (2)
3) is a three-dimensional welded reinforcing bar formed in combination, and the three-dimensional welded reinforcing bar (2) is produced at an ISO9000 certified factory. (3) is a concrete plate of a predetermined thickness (t) integrally formed by burying the upper part of the three-dimensional welded reinforcing bar (2), and the thickness (t) of the concrete plate (3) is the thickness of the floor plate. (H). The thickness (t) is generally 7 cm, but 4 cm is used for the roof, and 10 cm is preferably used for floors of four or more floors. The thickness (t) is determined according to the fire resistance standard. Also, concrete plate
When forming (3), the three-dimensional welded reinforcing bar (2) produced in the factory is floated in a frame of a predetermined size in a ready-mixed concrete factory of a JIS certified factory, and the Pour concrete inside and buried main reinforcement (21)
May be floated so as to be located at the center of the thickness (t).
In the present invention, the three-dimensional welded reinforcing bar (2) in which a part of the three-dimensional welded reinforcing bar (2) is embedded and the concrete plate (3) is integrally formed is referred to as a three-dimensionally welded reinforcing bar (see FIG. 3).

FIG. 2 is a view showing another embodiment of the present invention. The embodiment shown in FIG.
The concrete reinforcing plate (3) is arranged between the H-shaped steel beam (1) and the concrete slab (3) while the wave reinforcing bar (23) is in contact with the flange (11). It is integrally fixed between beams (1) made of H-section steel. Further, a new joint fitting (4) having a substantially S-shaped cross section is used for the above-described embodiment, one end of which is cast into concrete together with the three-dimensional welded reinforcing bar (2) and buried, and the other end of the joint fitting (4) is used. The end is fixedly integrated with the upper surface of the flange (11) by welding. Also, stud bolts (5) are provided on the upper surface of the flange (11) of the beam (1).
Are erected at predetermined intervals. The joint metal (4) transmits the horizontal force generated during the earthquake of the concrete slab (3) and transmits the horizontal force by the stud bolt (5). Further, joint concrete (6) is cast on the upper surface of the flange (11) for joint treatment.

Next, a method of constructing the reinforced concrete floor structure of the present embodiment will be described. A three-dimensional welded reinforcing bar with a three-dimensional welded reinforcing bar (2) with a concrete slab (3) previously produced stably at a factory is carried into the site. First, a three-dimensional welded reinforcing bar (2) with a concrete slab (3) shown in FIG. 3 is lifted at the site and laid on the upper surface of the flange (11) between the beams (1). At this time, the three-dimensional welded reinforcing bar (2) is suspended so as to face down, and the wave reinforcing bar (23) comes into contact with the flange (11) when laying. When a gap is formed between the adjacent concrete slabs (3), the gap is filled with a joint plate or joint material to make it flat. In addition, you may make a decorative finish on the floor board upper surface as needed. At this time, the thickness (h) of the floor plate in the present invention is 7 cm of the thickness (t) of the concrete slab (3). On the other hand, since the thickness (h) of the conventional floorboard is 16.5 cm, the present invention is less than half the thickness of the conventional floorboard, so that it can be easily transported and suspended, and concrete can be cast. Since it is almost unnecessary, the finish is quick. Further beams (1)
The space (L) can be extended to about 1.5 times longer than before, so that a small beam (1 ') for receiving the concrete slab (3) is unnecessary, and the ceiling space on the lower floor of the building The height of the space can be increased, so that the living space can be expanded, and the cost of the structural framework can be reduced and the construction period can be shortened by the absence of the small beams (1 '). In the case of the specification as it is, for example, in a shopping center or a factory, the three-dimensional welded reinforcing bar (2) exposed at the bottom serves as a reinforcing material for supporting a floor plate, and the three-dimensional welded reinforcing bar (2) is used for electric wiring, piping, etc. Of the equipment. Thereafter, the three-dimensional welded reinforcing bar (2) can be used as it is as a design with a paint finish. Incidentally, by exposing the exposed three-dimensional welded reinforcing bar (2) so as to be hidden and not finished unnecessarily, but by designing it, the cost can be reduced and the construction period can be shortened without trouble.

As a method of constructing a reinforced concrete floor structure of another embodiment, a concrete slab (3)
Then, a three-dimensional welded reinforcing bar (2) with a fixed metal fitting (4) is manufactured, and is brought into the site. Also, the stud bolt (5), which is set up on the upper surface of the flange (11) of the beam (1), is carried in and installed in the steel frame assembling factory. First, a three-dimensional welded reinforcing bar (2) with a concrete plate (3) is lifted at the site and laid on the upper surface of the flange (11) between the beams (1). In this case, a joint fitting (4) protruding from the side surface of the concrete slab (3) is used, and the three-dimensional welding reinforcing bar (2) is hung downward. Thus, the concrete slab (3) is sequentially laid between the beams (1) with the three-dimensional welding reinforcing bar (2) protruding downward. Thereafter, the other end of the joint (4) is fixed to the upper surface of the flange (11) by welding to integrate the three-dimensional welded reinforcing bar (2). Then, concrete is cast on the upper surface of the flange (11), jointed with joint concrete (6) and flattened, thereby obtaining a reinforced concrete floor and integrating each concrete plate (3) with the beam (1). Because At this time, when the concrete of the adjacent concrete slabs (3) solidifies, the stud bolts (5) are fixed to the beam (1), so that the concrete slabs (3) are firmly integrated so as not to float.

[0011]

The present invention having the above-described structure has the following effects.

A concrete plate (3) having a predetermined thickness (t) integrally formed by embedding an upper part of a three-dimensional welded reinforcing bar (2) between beams (1) made of H-section steel as in claim 1. Laying,
The floor plate is completed by simply laying the concrete slab (3) integrally formed by projecting the three-dimensional welded reinforcing bar (2) downward with a crane or the like between the beams (1) by forming it as a floor plate at the site. Therefore, the on-site work is reduced to the utmost, so that the on-site management becomes almost unnecessary, and the concrete placing work as in the past becomes unnecessary, so that many workers become unnecessary, and the construction period is shortened and 30 to 40% is reduced. It is possible to reduce costs and labor. In addition, it is possible to use a stable three-dimensional welded rebar of a quality that is mass-produced in the factory, simplifying and leveling the work, spacing from the beam (1) by load from design calculation to production and construction, concrete It is possible to study by combining the thickness (t) of plate (3), the diameter of reinforcing bar, and the height of the three-dimensional structure. Therefore, it is possible to adopt a type that is appropriate for the type according to the specifications. However, the type can be selected, which is convenient for work progress. As described above, since the manufacturer can perform consistent quality control and delivery date management until the site construction is delivered, it is possible to perform construction management that eliminates ambiguous accident handling and facilitates pursuit of responsibility. In addition, the three-dimensional welded reinforcing bar (2) serves as a reinforcing material to support the floor plate, resulting in a robust three-dimensional truss with a small amount of reinforcing bars.
Since the weight can be reduced and the weight of the floorboard is reduced, the interval (L) between the beams (1) can be made large, and a large layout can be obtained and a high ceiling can be secured. A simple and wide space can be obtained, and the conventionally used small beam (1 ') becomes unnecessary, and the cost can be reduced. In addition, the installation work of the metal fittings for the wiring work and the plumbing work, which had been performed after the completion of the floorboard, becomes unnecessary, and the concrete plate
Immediately after the installation of (3), wiring and piping work can be performed using the three-dimensional welded reinforcing bar (2), which contributes to shortening the construction period of the building and can reduce costs.

According to a second aspect of the present invention, the flange (1) of the beam (1) is provided.
1) Part of 3D welded rebar (2), especially wave rebar (23)
And concrete plate (3) with flange (1
1) By being placed on the upper surface, it becomes strong against left and right sway and prevents the floor plate from falling even if it is pushed up. Also concrete version (3)
Is capable of supporting the load from above because of its ability to compress, and also has three-dimensional welded reinforcing bar for tension (2)
At the same time, the weight of the floorboard is reduced.

According to a third aspect of the present invention, an H-beam is provided.
Concrete slab of predetermined thickness (t) laid between them (3)
And a three-dimensional welded reinforcing bar (2) whose upper part is embedded in the concrete plate (3) in advance, and one end having a substantially S-shaped cross section is embedded in the concrete plate (3) together with the upper part of the three-dimensional welded reinforcing bar (2). A large number of joint fittings (4) projecting from the side of the concrete slab (3) on which the other end is placed on the beam (1) and fixed by welding, and being cast on the upper surface of the flange (11) of the beam (1) And the floor plate is fixed integrally with the upper surface of the flange (11) of the beam (1) made of an H-section steel by forming the joint concrete (6).
It is possible to prevent the floor plate from falling even when it is shaken by an external force due to an earthquake or a strong wind. Furthermore, when lifting a three-dimensional welded reinforcing bar in which a part of the three-dimensional welded reinforcing bar (2) is buried in the concrete slab (3), it can be easily laid by using the joint fitting (4). Becomes

According to a fourth aspect of the present invention, a concrete plate (3) is provided.
When a predetermined thickness (t) of 4 cm is used, if the roof is used as the topmost roof, the weight of the roof is reduced, so that transportation and construction are easy and cost can be reduced. If the concrete plate (3) has a predetermined thickness (t) of 7 cm, it can be used as a floor material from the first floor to the third floor, so that the whole is lightened and the interval (L) of the beams (1) is reduced. Can be extended 1.5 times longer than conventional ones. Further, when the predetermined thickness (t) of 10 cm is used, it can be used as a flooring material for floors of four or more floors and can be used as a flooring material at a place suitable for the fire resistance standard for two hours and has a light weight. And cost reduction is possible.

According to the fifth aspect of the present invention, the concrete plate (3) can be fixed integrally with the beam (1) by arranging the stud bolts (5) on the upper surface of the flange (11) at predetermined intervals. Become. The concrete slab (3) transmits the horizontal force generated during the earthquake to the beam (1) by the stud bolts (5) and disperses it.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a main part of another embodiment.

FIG. 3 is a perspective view showing a three-dimensional welding assembly reinforcing bar used in the present embodiment.

FIG. 4 is a cross-sectional view showing a main part of a conventional embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Beam 11 Flange 2 Three-dimensional welded reinforcing bar 3 Concrete plate 4 Joint fitting 5 Stud bolt 6 Joint concrete t Thickness of concrete plate

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E04C 2/06 E04C 2/50 K

Claims (5)

[Claims] 1. A concrete plate (3) having a predetermined thickness (t) in which an upper portion of a three-dimensional welded reinforcing bar (2) is buried and integrally formed is laid between beams (1) made of an H-shaped steel, A reinforced concrete floor structure using a three-dimensionally welded reinforcing bar, wherein the concrete slab (3) is formed as a floor plate. 2. The flange (1) of said H-beam (1).
The reinforced concrete floor structure using a three-dimensionally welded reinforcing bar according to claim 1, wherein a part of the three-dimensionally welded reinforcing bar (2) is brought into contact with (1) and the concrete plate (3) is placed on the upper surface of the flange (11). . 3. A concrete plate (3) having a predetermined thickness (t) laid between beams (1) made of H-section steel, and the concrete plate
(3) A three-dimensional welded reinforcing bar (2) having an upper part embedded therein in advance, and one end of a substantially S-shaped cross section is previously embedded in the concrete plate (3) together with an upper part of the three-dimensional welded reinforcing bar (2). The concrete plate whose other end is placed on the beam (1)
(3) A three-dimensional structure comprising a large number of joints (4) projecting from the side and fixed by welding, and joint concrete (6) cast on the upper surface of the flange (11) of the beam (1). Reinforced concrete floor structure using welded reinforcing bars. 4. The concrete plate (3) having a predetermined thickness (t) of one of 4 cm, 7 cm and 10 cm.
Or a reinforced concrete floor structure using the three-dimensionally welded reinforcing bar according to 3. 5. A reinforced concrete floor structure using a three-dimensional welded reinforcing bar according to claim 2, wherein stud bolts (5) are erected at predetermined intervals on the upper surface of the flange (11).