JPH11117440A - Deck plate excellent in in-plane shearing yield strength - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain excellent in-plane shearing yield strength by forming a deck plate with a deck plate main body and a fastening member fixed at least between upper flanges or between lower flanges of the deck plate main body. SOLUTION: A steel pipe is flatly squashed by at least the width of an upper flange 3A at the same interval as the interval between the upper flanges 3A to form a fastening member 4, and the fastening member 4 is fixed between the upper flanges 3A of a deck plate main body 3. The fixing method of the fastening member 4 is determined according to the distribution of the shearing stress applied to the deck plate main body 3. When in-plane shearing stress is applied to the deck plate main body 3 in the direction of an arrow, the fastening member 4 is diagonally fixed so that pressure is applied to the fastening member 4, thereby a deck plate having excellent in-plane shearing yield strength and hardly deformed by the in-plane shearing stress can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deck plate, and more particularly to a deck plate having excellent in-plane shear strength due to a binding material being fixed between flanges.

[0002]

2. Description of the Related Art In a building such as a nuclear power plant in which a thick earthquake-resistant wall or a very rigid bearing wall is constructed, it is necessary to construct a floor slab having excellent in-plane shear strength corresponding to these walls. is there.

Conventionally, the in-plane shear strength of a floor slab has been provided by concrete 2 cast on a deck plate 1 as shown in FIG. The reason is as follows. When a floor slab composed of the deck plate 1 and the concrete 2 as shown in FIG. 3 receives an in-plane shear stress, the sectional shape of the deck plate 1 is deformed as shown in FIG. When the deck plate 1 is deformed in this manner, the strength corresponding to the cross-sectional area of the deck plate 1 cannot be guaranteed. Therefore, the deck plate 1 could not be expected to have in-plane shear strength. In FIG. 4, the two-dot chain line indicates the deck plate 1 that has been deformed by receiving in-plane shear stress, and the concrete 2 that has entered the deck plate 1.
The portion is crushed by the deformation of the deck plate 1 and a crack is generated. Therefore, the only in-plane effective shear strength portion of the concrete 2 is the concrete portion cast on the upper flange 1A of the deck plate 1. . Therefore, it was necessary to increase the amount of the concrete 2 to be poured and to impart a desired in-plane shear strength to the floor slab.

[0004]

However, increasing the amount of cast concrete 2 leads to an increase in weight and a rise in construction costs.

Accordingly, an object of the present invention is to provide a deck plate which is not easily deformed by in-plane shear stress and has excellent in-plane shear strength.

[0006]

According to the first aspect of the present invention,
It is characterized by comprising a deck plate main body and a binding material fixed between at least one of an upper flange and a lower flange of the deck plate main body.

According to a second aspect of the present invention, the binding material comprises a steel pipe crushed flat at least by the length of the flange at the same interval as the interval between the flanges. The flat portion thus formed is fixed to the flange.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a deck plate of the present invention having excellent in-plane shear strength will be described with reference to the drawings.

FIG. 1 is a partial plan view showing a deck plate having excellent in-plane shear strength according to the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG. 1 and 2, 3
Is a deck plate body, and 4 is a binding material fixed between the upper flanges 3A of the deck plate body 3. The binding material 4 is formed by crushing a steel pipe flat at least by the width of the upper flange 3 at the same interval as the interval of the upper flange 3A, and the flat portion 4A thus formed is formed. It is fixed to the upper flange 3A by means such as tapping screws, bolts, and welding.

As described above, by fixing the binding material 4 between the upper flanges 3A of the deck plate main body 3, the bending rigidity of the pipe cross section can be expected in the groove portion of the deck plate main body 3, and the deck plate has an in-plane rigidity. It can provide shear strength.

The binding material 4 may be fixed not only between the upper flanges 3A but also between the lower flanges 3B or both the flanges 3A and 3B as described above. Further, the binding material 4 may be a steel strip, a round steel, a shaped steel, a steel square pipe, or the like, other than the steel pipe.

The fixing direction of the binding material 4 is determined according to the distribution of the shear stress acting on the deck plate main body 3. That is,
When the in-plane shear stress acts on the deck plate body 3 in the direction shown in FIG. 1, the binding material 4 is fixed obliquely so that a compressive force is applied to the binding material 4. Thereby, the effect of the binding material 4 appears more. If a plurality of binding members 4 are fixed between the flanges of the deck plate main body 3 in a zigzag manner, it is possible to cope with in-plane shear stress in all directions.

[0013]

As described above, according to the present invention, by fixing the binding material between the flanges, it is possible to obtain a deck plate which is not easily deformed by in-plane shear stress and has excellent in-plane shear strength. In the case of constructing a floor slab with the deck plate of the present invention, a useful effect that the amount of concrete to be poured can be greatly reduced is brought about.

[Brief description of the drawings]

FIG. 1 is a partial plan view showing a deck plate having excellent in-plane shear strength of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a partial sectional view showing a conventional floor slab.

FIG. 4 is a cross-sectional view showing deformation of a deck plate due to in-plane shear stress.

[Explanation of symbols]

 1: deck plate 1A: upper flange 2: concrete 3: deck plate body 3A: upper flange 3B: lower flange 4: binding material 4A: flat portion

Claims (2)

[Claims] 1. A deck plate having excellent in-plane shear strength, comprising: a deck plate main body; and a binding material fixed between at least one of an upper flange and a lower flange of the deck plate main body. . 2. The flattening member formed by squashing a steel pipe flat at least by the length of the flange width at the same interval as the flange interval. The deck plate according to claim 1, wherein is fixed to the flange.