JP2575845Y2 - Deck plate floor reinforcement structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deck plate floor in a steel frame or a steel reinforced building, and more particularly, to a reinforcing structure for a deck plate floor.

[0002]

2. Description of the Related Art A so-called deck plate floor is widely used as a floor in a steel frame or a steel reinforced building. For example, as shown in FIG. 3, the deck plate floor is formed by connecting a peripheral portion of a deck plate 1 in which peaks and valleys are alternately formed in the width direction.
It is joined to a support beam 2 which is formed in a rectangular shape slightly larger than the plate 1, and then a concrete (not shown) is cast from above the deck plate 1.

[0003]

[Problem to be solved by the invention] In such a structure,
It is known that most of the load applied to the deck plate floor is borne in the length direction of the deck plate (in the horizontal direction in FIG. 3). The deck plate is bent by the load, and the bent shape caused by the bending is desirably a smooth curved surface with respect to the entire floor slab. This is because if the bent shape is not a smooth curved surface with respect to the entire floor slab, that is, if there is a portion where the curvature changes suddenly, the inside of the concrete cast at that portion is larger than the surroundings. Stress acts,
This is because cracks may be induced in the concrete.

FIG. 6 shows the result of simulating the bending shape of a deck plate floor whose peripheral portion is supported by a supporting beam. According to this simulation result, the deck plate is shown in FIG. In the length direction (x-axis direction in the figure), the curvature of the curved surface near the end of the deck plate fixed to the support beam changes largely as compared with the periphery. For this reason, as described above, this portion has a problem that cracks are apt to be formed after the concrete is cast, and the reliability as a deck plate floor is lacking. In particular, when the hardening of the concrete is fast, the occurrence of cracks is more remarkable.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a highly reliable deck plate floor reinforcing structure which minimizes the occurrence of cracks in concrete.

[0006]

According to the present invention, there is provided a reinforcing structure for a deck plate floor according to the present invention. At the corners where the beams are formed orthogonally, reinforcing beams are provided obliquely.

[0007]

In the corner where the supporting beam is formed at right angles, the deck plate floor is also supported by the reinforcing beam obliquely provided at the corner, and therefore, conventionally, especially in the vicinity of the supporting beam. The curvature of the curved surface was greatly changed due to the bending of the deck plate, but became a smooth change. Therefore, even if the concrete was cast, no large stress was generated inside the concrete. Thus, cracks due to the flexibility of the deck plate after the concrete is cast can be prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is an overall perspective view showing an embodiment of a reinforcing structure for a deck plate floor according to the present invention, and FIG. 2 is a perspective view showing a mounting portion of a reinforcing beam in the embodiment shown in FIG. 3 is a plan view of the deck plate floor reinforcement structure with the deck plate attached, FIG. 4 is a sectional view taken along the line AA ′ of FIG. 3, and FIG. 5 is a deck plate floor reinforcement structure according to the present invention. FIG. 10 is a perspective view showing, by simulation, deflection of the deck plate floor in a state where the floor is attached.

As shown in a perspective view of a main part of the deck plate floor reinforcing structure, a peripheral portion of a deck plate floor (not shown in FIG. 1) is placed and fixed on the deck plate floor reinforcing structure. The reinforcing beam 3 is provided at a corner of the supporting beam 2. That is, the support beam 2 is for mounting and fixing a deck plate floor (not shown), and in this embodiment, so-called H steel is used. And this support beam 2
Are arranged in a lattice of an appropriate size so as to be perpendicular to each other (not shown), and a deck plate floor having a deck plate as a formwork is placed and fixed on this lattice portion. It has become. FIG. 3 is a plan view showing a state in which the deck plate 1 is placed on the support beam 2 and fixed, and the deck plate 1 on which the concrete is cast is a valley at its peripheral portion. The part is provided so as to be joined to the surface of the support beam 2.

The reinforcing beam 3 is provided at a corner A formed by the orthogonality of the supporting beam 2 as described below. Also, the corner of the deck plate 1 is located at the corner A. That is,
The reinforcing beam 3 in the present embodiment is made of, for example, a steel member similar to the supporting beam 2, has a U-shaped cross section in the short axis direction, and has a mounting piece 5 fixed near the end thereof. (See FIG. 2). The mounting piece 5 is formed by bending a small piece made of a steel material or the like at a substantially right angle at substantially the center. From this bent portion, one flat portion 5a is fixed to the back portion 3a of the reinforcing beam 3 by, for example, welding. The other flat portion 5b of the mounting piece 5 is exactly the same as the surface of one side of the reinforcing beam 3 (the surface facing the other side 3b, not shown in FIG. 2). It is located on the plane of. Further, a long hole 6 is formed in the other flat portion 5b of the mounting piece 5, and a bolt 7 used for mounting the reinforcing beam 3 is inserted into the long hole 6. .

On the other hand, a receiving portion 8 for attaching the reinforcing beam 3 is formed on the support beam 2 (see FIGS. 1 and 2).
The receiving portion 8 has a receiving piece 8b suspended from a flat plate 8a, and is fixed to a side portion of the support beam 2 by, for example, welding. A bolt hole 9 is formed in the receiving piece 8b, and a nut 10 (FIG. 2) is formed on the back surface of the bolt hole 9 (the surface opposite to the surface on which the reinforcing beam 3 is placed in FIG. 2).
(Indicated by a dotted line) is fixed in advance. further,
The position where the receiving piece 8b is suspended is such that when the reinforcing beam 3 is attached, the surface of the side portion 3b of the reinforcing beam 3 and the upper surface 2a of the support beam 2 are located on the same plane. . In this embodiment, the angle Θ formed between the reinforcing beam 3 and the supporting beam 2 (FIG. 1)
Is set to 45 degrees.

As shown in FIG. 2, the reinforcing beam 3 is attached to the receiving piece 8b of the receiving portion 8 so that the other flat portion 5b of the mounting piece 5 is joined to the receiving piece 8b. Place. Then, the bolt 7 is inserted from the long hole 6 of the mounting piece 5 into the bolt hole 9 of the receiving portion 8, and the bolt 7 is screwed into the nut 10 provided in the receiving portion 8 by rotating the bolt 7, and finally, Then, the reinforcing beam 3 is fixed to the receiving portion 8 by the bolt 8.

After the installation of the reinforcing beam 3 is completed, FIG.
As shown in (1), the deck plate 1 is placed so that its peripheral portion is positioned on the support beam 2, and is fixed by a predetermined method. As a result, at the corner of the deck plate 1, a part of the valley 4 is joined to the side 3b of the reinforcing beam 3, and the joint is supported.

FIG. 5 simulates the state of flexure of the deck plate floor when the reinforcing beam according to the present invention is provided.
6 are compared with the simulation results of the conventional structure shown in FIG. 6, in the deck plate floor reinforcing structure according to the present invention, the deck plate on which the reinforcing beams 3 are located. The change in the curvature of the curved surface (the portion denoted by reference numeral B in FIG. 5) due to the bending of the end of the gate 1, that is, the portion placed on the support beam 2, is extremely gentle as compared with the related art. Therefore, even if the concrete is cast in this portion, the stress generated inside the concrete is small unlike the related art, so that the crack does not occur after the concrete is cast in this portion.

In the above-described embodiment, the reinforcing beam 3 has a U-shaped cross section in the short axis direction. However, the present invention is not necessarily limited to this shape. The upper surface (the portion corresponding to the surface of the side portion 3b in this embodiment) is located on the same plane as the upper surface of the support beam 2, and a part of the valley of the deck plate is joined to form the reinforcing beam. The other shape may be used as long as it supports the port. Also, it is needless to say that the method of attaching the reinforcing beam does not need to be limited to the bolting as shown in the present embodiment.

[0016]

As described above, the reinforcing structure of the deck plate floor according to the present invention has a large curvature change portion so that the curvature of the curved surface due to the bending of the deck plate becomes smooth. -By reinforcing the support of the part of the plate, the curvature change of the curved surface generated on the deck plate becomes smooth, so that even if the concrete is cast, large stress is generated inside the concrete. No cracks occur in this area after the concrete is cast, and a highly reliable deck play
This provides an effect that a floor can be provided.

As means for smoothing the curved curved surface of the deck plate formwork, in addition to the structure of the present invention, an auxiliary beam may be inserted in parallel with the longer support beam, or the length of the deck plate in the longitudinal direction (the longer one). It is also conceivable to insert the auxiliary beam in the direction perpendicular to the support beam) .However, in these structures, the length to insert the auxiliary beam is different for each slab, so it is difficult to commercialize the auxiliary beam, and the length is also long Therefore, the auxiliary beams increase the cost in combination with increasing the rigidity. However, in the present invention, the auxiliary beams can be used in all cases with a short auxiliary beam having a length of about 1.4 m. Can be provided at low cost.

Further, in the case of a structure in which an auxiliary beam is inserted in parallel with the longer support beam or an auxiliary beam is inserted in the deck plate length direction (a direction orthogonal to the longer support beam), the support beam or the deck plate is used. As the length of the member is different, it is necessary to calculate the member rigidity for giving the elastic displacement each time, which is troublesome. However, in the present invention, it is not necessary to calculate the member rigidity because it is fixed as described above. This has the effect that there is no such trouble.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a reinforcing structure of a deck plate floor according to the present invention.

FIG. 2 is an exploded perspective view for explaining attachment of a reinforcing beam in the embodiment shown in FIG.

FIG. 3 is a plan view showing a state in which the deck plate floor is mounted in the deck plate floor reinforcing structure according to the present invention.

FIG. 4 is a sectional view taken along line A-A 'of FIG.

FIG. 5 is a perspective view showing a simulation result of a state of bending of the deck plate floor when the deck plate floor reinforcing structure according to the present invention is used.

FIG. 6 is a perspective view showing a result of simulating a state of bending in a conventional deck plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Deck plate 3 Reinforcement beam 4 Valley 5 Mounting piece 8 Receiving part 8b Receiving piece 10 Nut

Claims (1)

(57) [Scope of request for utility model registration] 1. A support beam is combined vertically and horizontally so that a peripheral portion of a deck plate floor is placed thereon, and a reinforcing beam is provided obliquely at a corner formed at right angles to the support beam. A deck plate floor reinforcement structure characterized by the following.