JP2000273997A - Compound floor slab made of structural steel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the strength by filling lightweight mortar or lightweight cement paste on a steel panel having a middle rib and side ribs respectively projecting out from the top surface portion of the bottom plate and isolating portion. SOLUTION: A side rib 1b with the cross section almost L-shaped is provided at each end portion in a direction perpendicular to the axis of the bottom plate 1a, and middle ribs 1c having almost L-shaped or T-shaped cross section are provided at predetermined intervals on the bottom plate 1a and a steel panel 1 is formed. And at both the end portions in shaft direction of the panel 1, a stiffening frame member 6 having an almost L-shaped cross section is placed across the side rib 1b and middle rib 1c and attached in one united body. And at both the end portions in axial direction of the panel 1, a joint fittings 7 having a horizontal flange 7a secured with bolts to the top of a steel beam is placed across the side rib 1b and the middle rib 1c and attached to a stiffening frame member 6 in one united body. Further on the panel 1, lightweight mortar or lightweight cement paste 2 is filled, on which a top plate 3 is attached and a compound floor slab 4 made of structural steel is formed thereby increasing the strength.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structural steel composite floor panel widely used as a substitute for a precast concrete panel (hereinafter referred to as "PC panel").

[0002]

2. Description of the Related Art Hitherto, as shown in FIGS. 6 (a) and 6 (b), many floors of a steel building in which a frame such as a pillar is made of a steel frame have been used. It was constructed by laying a plurality of PC boards, mainly a lightweight cellular concrete board (hereinafter referred to as “ALC board”) 12, on a steel beam 11.

However, when the PC board 12 such as an ALC board is to be laid on the steel beam 11 as a floor board, the PC board 12 and the steel beam 11 are different from each other because the PC board 12 and the steel beam 11 are made of different materials. Not only is it extremely troublesome to fix, but also it was necessary to reinforce the floor frame with a floor brace (not shown) in preparation for a horizontal external force acting on the floor frame composed of the steel beams 11.

In addition, the PC board 12 is transported or the steel beam 1
When installed on the PC board 12
There was also a problem such as damage to the device. The present invention has been made in order to solve the above-mentioned problems, and in particular, to provide a structural steel composite floor panel which has higher strength than a conventional PC panel and can be easily fixed to a steel beam. With the goal.

[0005]

According to a first aspect of the present invention, there is provided a structural steel composite floor panel according to the present invention. A lightweight mortar or lightweight cement paste is filled on a steel panel having a middle rib and side ribs.

According to a second aspect, in the structural steel composite floor panel of the first aspect, the bottom plate is bent to form side ribs and middle ribs. As a third aspect, in the structural steel composite floorboard of the first or second aspect, a heat insulating material is embedded in the lightweight mortar or the lightweight cement paste.

[0007]

1 to 5 show an embodiment of the present invention. In the drawings, a steel panel 1 is filled with a lightweight mortar or a lightweight cement paste 2 to a predetermined thickness. An upper plate 3 is mounted thereon to form a rectangular steel composite floor plate 4 for structural steel. The structural steel composite floorboard 4 thus formed is installed between the steel beams 5 and 5.

The steel panel 1 has a rectangular bottom plate 1a and side ribs 1b each having a substantially L-shaped cross section projecting from both ends of the bottom plate 1a in a direction perpendicular to the axis (width direction of the bottom plate 1a). It has a plurality of middle ribs 1c having a substantially L-shaped or T-shaped cross section protruding at predetermined intervals on the bottom plate 1a, and is formed in a shallow and flat box shape.

The side ribs 1b and the middle ribs 1c are formed continuously in the axial direction of the bottom plate 1a, and the middle ribs 1c are formed at predetermined intervals in the direction perpendicular to the axis. The bottom plate 1a and the side ribs 1
5b, the middle rib 1c may be formed integrally by, for example, bending a bottom plate 1a (one sheet of steel) by pressing or the like as shown in FIG. 5 (b), or the bottom plate 1a and the side rib 1b. Alternatively, the middle ribs 1c may be separately formed and then integrally formed later.

[0010] Joint metal fittings 7 connected to the reinforcing frame member 6 and the steel beam 5 are projected from both ends in the axial direction of the steel panel 1 thus formed. Reinforcement frame 6 has a cross section of approximately L
It is formed in the shape of a letter, is horizontally hung between the side ribs 1b at both ends and a plurality of middle ribs 1c in the middle, and is integrally attached to the side ribs 1b and the middle ribs 1c by welding or the like.

The joint fitting 7 has a horizontal flange 7a bolted by a fixing bolt 8 on the steel beam 5 and is formed in a substantially L-shaped cross section. The joint fitting 7 is horizontally extended between the side ribs 1b at both ends and a plurality of intermediate ribs 1c in the middle similarly to the reinforcing frame member 6, and is integrated with the reinforcing frame member 6 by welding or bolting. Attached to.

The joint fitting 7 is provided so that the horizontal flange 7a is flush with the upper plate 3. By doing so, the structural steel composite floor panel 4 can be installed between the steel beams 5 at substantially the same level as the steel beams 5, and the floor height can be kept low.

The lightweight mortar or the lightweight cement paste 2 is, for example, air mortar (cellular mortar, cellular concrete), air milk or the like.
All gaps between them are uniformly filled and fully cured.

When filling the lightweight mortar or the lightweight cement paste 2, a leakage prevention dam (not shown) made of a plywood or the like is attached to both ends of the steel panel 1 in the axial direction. The member 6 or the joint fitting 7 may be formed larger to completely close both ends of the steel panel 1 in the axial direction.

Further, a heat insulating material 9 such as a styrofoam is provided on the bottom plate 1a as shown in FIG. 5 (a), for example. By embedding the heat insulating material 9 in the paste 2, the heat insulating property and the sound insulating property may be enhanced.

The upper plate 3 is, for example, a particle board.
It is attached to the upper rib 1d of the side rib 1b and the middle rib 1c by screwing or the like. Note that, for example, FIG.
The rigidity can be increased by forming the upper plate 3 from a steel plate as shown in FIG.

FIGS. 3 and 4 show a structural composite floor panel of a type in which an end portion is directly mounted on a steel beam 5 and fixed. A joint fitting 7 is attached to an axial end portion of the steel panel 1. Instead of projecting, a plurality of insert nuts 10 having screw holes for screwing the fixing bolts 8 open right below are embedded. Other configurations are exactly the same as those described with reference to FIGS.

[0018]

The present invention has the above-described structure,
In particular, since a steel plate having a bottom plate, a middle rib and side ribs protruding from an upper surface and an edge of the bottom plate, respectively, is used, the bending rigidity is extremely large and a large panel can be formed.

Further, since both the compressive strength and the tensile strength are large and the horizontal external force can be transmitted, it is not necessary to reinforce the floor frame with the reinforcing braces. Also, by processing the end of the steel panel or welding a separately formed metal fitting to the end of the steel panel, the joint for fixing to the steel beam can be freely formed, so that the steel beam is relatively Can be easily fixed.

Further, since the heat insulating material is buried in the light weight mortar or the light weight cement paste, not only the heat insulating property is excellent, but also the weight can be reduced. further,
Since molding can be performed simply by filling lightweight mortar or lightweight cement paste on a steel panel, it can be easily manufactured, and mass production and cost reduction can be achieved.

[Brief description of the drawings]

FIG. 1 shows an example of a structural steel composite floor panel, in which (a) is a partially cutaway perspective view and (b) is an end sectional view.

FIG. 2 shows an attached state of the structural steel composite floorboard, and FIG.
Is a partial perspective view, and (b) is an end sectional view.

3A and 3B show an example of a structural steel composite floor panel, wherein FIG. 3A is a partially cutaway perspective view, and FIG. 3B is an end sectional view.

FIG. 4 shows the mounting state of the structural steel composite floorboard, and (a)
Is a partial perspective view, and (b) is an end sectional view.

FIG. 5 is a cross-sectional view showing another example of the structural steel composite floorboard.

FIG. 6A is a perspective view of a PC board, and FIG. 6B is a perspective view showing an attached state of the PC board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel panel 2 Light weight mortar or lightweight cement paste 3 Upper plate 4 Structural steel composite floor plate 5 Steel beam 6 Reinforcement frame 7 Joint fitting 8 Fixing bolt 9 Insulation material 10 Insert nut 11 PC board 12 Steel beam

Claims (3)

[Claims] 1. A structure in which a lightweight mortar or a lightweight cement paste is filled on a steel panel having a bottom plate, a middle rib and a side rib protruding from a top surface and an edge of the bottom plate, respectively. Steel composite floorboard. 2. The structural steel composite floor plate according to claim 1, wherein the side plate and the middle rib are formed by bending a bottom plate. 3. The structural steel composite floor board according to claim 1, wherein a heat insulating material is buried in the lightweight mortar or the lightweight cement paste.