JPH07923B2 - Flat slab structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a). TECHNICAL FIELD The present invention relates to a flat slab structure capable of reducing the weight of a building and shortening the construction period.

(B). 2. Description of the Related Art FIG. 3 is a plan view showing an example of a conventional flat slab structure, and FIG. 4 is a sectional view showing an example of a conventional flat slab structure.

Conventionally, as shown in FIGS. 3 and 4, a flat slab structure 1 has a beam 3 and a pillar 5 of an outer peripheral portion 2 which form an earthquake-resistant structure, and a pillar 8 which supports a flat slab 4 together with a reinforced concrete structure. Met.

(C). Problems to be Solved by the Invention However, this requires a large amount of formwork work and rebar work, which leads to a relatively long construction period and high construction costs. Moreover, there is a drawback that the weight of the structure itself becomes heavy.

Further, since the flat slab structure is not provided with a beam inside the structure, it is necessary to support horizontal force at its outer peripheral portion, and therefore the outer peripheral portion is inevitably a seismic resistant structure.

However, when trying to support the horizontal force at the outer periphery of the reinforced concrete structure, the structure becomes
There is no choice but to adopt a seismic structure consisting of beams and seismic walls, and the outer periphery of the flat slab structure is surrounded by seismic walls, which restricts openings for passage and ventilation, which impairs the freedom of design. There was Since flat slab structures are often used in shopping centers, etc., it is highly demanded that openings such as entrances and exits can be provided on the outer wall of the structure at arbitrary positions, but the outer periphery is reinforced concrete. When constructed, there is the inconvenience that the earthquake-resistant wall interferes and a sufficient opening cannot be taken at an arbitrary position.

The present invention provides a flat slab structure capable of shortening the construction period to reduce the above-mentioned drawbacks, reducing formwork work and rebar work, and further reducing the weight of the building itself. The purpose is to do.

Another object of the present invention is to provide a flat slab structure which can be opened at any position on the outer peripheral portion and has a high degree of freedom in design.

(D). Means for Solving the Problem That is, according to the present invention, in a flat slab structure (6) in which a plurality of flat slabs (12) are vertically stacked, a horizontal force is applied to the outer peripheral portion. It has a steel frame outer peripheral structure consisting only of a steel frame column (7), a steel beam (9) and a brace (15), and the flat slab (12) is provided inside the steel frame outer peripheral structure, and the slab surface of the flat slab is the steel frame outer periphery. It is provided so as to be connected to a steel beam of a structure, and the steel frame outer peripheral structure is formed by directly surrounding the outer peripheral portions of the flat slabs vertically adjacent to each other with the steel frame outer peripheral structure. It is constructed by supporting steel pipe concrete columns (13) between the lower slabs.

It should be noted that the numbers in parentheses indicate the corresponding elements in the drawings for the sake of convenience, and thus the present description is not limited to the description in the drawings. The following “(e).
The same applies to the column of "action".

(E). Action With the above-mentioned configuration, the present invention acts so that the reinforcing bar is arranged only in the substantially flat slab (12) part.

Further, the present invention acts so that the periphery of the flat slab (12) is directly surrounded by the steel frame outer peripheral structure.

(F). Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of the flat slab structure according to the present invention, and FIG. 2 is a sectional view of FIG.

As shown in FIGS. 1 and 2, the flat slab structure 6 includes a steel column 7 and a steel beam 9 on an outer peripheral portion 10 that bears a horizontal force.
And a steel frame outer peripheral structure 11 constructed in three layers from only steel frame members such as brace 15 and the like. Inside the steel frame outer peripheral structure 11, a flat slab 12 made of steel concrete without beams is provided for each layer. In the horizontal direction, the slab surface of the flat slab 12 is provided so as to be connected to the steel beam 9 of the steel frame outer peripheral structure. Further, as a result, the steel frame outer peripheral structure 11 has the flat slabs 12 that are vertically adjacent to each other.
Is provided so as to directly surround the outer peripheral portion of the. Between the flat slab 12 and the slab surface of the lower layer of each flat slab 12, a steel pipe concrete column 13 is provided, the steel pipe concrete column 13 has a steel pipe 13a in the outer peripheral portion, and the concrete mortar inside the steel pipe 13a. (In the present specification, “concrete mortar” means “concrete” or “mortar”; hereinafter the same).

(G). EFFECTS OF THE INVENTION As described above, according to the present invention, in the flat slab structure 6 in which the plurality of flat slabs 12 are vertically stacked, the steel column that bears the horizontal force on the outer peripheral portion thereof. 7. A steel frame outer peripheral structure 11 including only the steel frame beam 9 and the braces 15, the flat slab 12 is connected to the inside of the steel frame outer peripheral structure, and the slab surface of the flat slab is connected to the steel frame beam 9 of the steel frame outer peripheral structure. The outer peripheral structure of the flat slab vertically adjacent to each other is directly surrounded by the outer peripheral structure of the steel frame, the steel pipe between the flat slab and the slab of the lower layer of the flat slab. Since it is configured to be supported by the concrete columns 13, only the flat slab 12 is the part where the reinforcing bars are reinforced, and the columns 5 and the beams 3 of the outer peripheral part 2 are reinforced concrete as in the conventional case. It is possible to eliminate the complicated bar arrangement work and the formwork work as in the case of forming by, and the construction period can be shortened accordingly. Moreover, since the reinforced concrete portion of the flat slab structure 6 is reduced, the weight of the entire structure can be reduced.

Further, the flat slab inside the steel frame outer peripheral structure, the slab surface of the flat slab is provided in a form connected to the steel frame beam of the steel frame outer peripheral structure, the steel frame outer peripheral structure, the outer peripheral portion of the flat slab adjacent to each other in the vertical direction. Since the flat slab is formed so as to be directly surrounded by the outer peripheral structure of the steel frame, the outer periphery of the flat slab is directly surrounded by the steel column, the steel beam and the brace, and is not blocked by the earthquake resistant wall or the like. Therefore, the opening can be provided in an arbitrary position of the steel frame outer peripheral structure in an arbitrary size, the degree of freedom in design can be significantly improved, and the problem of the opening in a shopping center or the like can be solved. The spread of flat slab structures can be promoted.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a flat slab structure according to the present invention, FIG. 2 is a sectional view of FIG. 1, FIG. 3 is a plan view showing an example of a conventional flat slab structure, and FIG. FIG. 4 is a sectional view showing an example of a conventional flat slab structure. 7 …… Steel column, 9 …… Steel beam 15 …… Brace 6 …… Flat slab structure 10 …… Outer peripheral part 11 …… Steel outer structure 12 …… Flat slab 13 …… Steel tube concrete column

Claims (1)

[Claims] 1. A flat slab structure, in which a plurality of flat slabs are vertically stacked, having a steel frame outer peripheral structure consisting only of a steel column, a steel beam and a brace that bears a horizontal force on the outer peripheral portion. The flat slab is provided inside the steel frame outer peripheral structure in such a manner that the slab surface of the flat slab is connected to the steel beam of the steel frame outer peripheral structure, and the steel frame outer peripheral structures are vertically adjacent to each other. A flat slab structure in which the outer peripheral portion of the flat slab is directly surrounded by the steel frame outer peripheral structure, and the flat slab and a lower slab of the flat slab are supported by steel pipe concrete columns.