JP2003090097A - Joint structure between steel-pipe column and flat slab, and method for connecting the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint structure between a steel-pipe column and a flat slab, which sufficiently ensures the strength at a joint portion by executing minimum working on a steel-pipe column main body at a location of a header of the flat slab, and to provide a method for connecting the steel-pipe column and the flat slab to each other. SOLUTION: The joint structure 1 between the steel-pipe column and the flat slab is implemented by connecting an upper plate 6 and a lower plate 7 to each other via a vertical plate 8 to form a reinforcing body 3, setting the reinforcing body 3 on the steel-pipe column main body 4, and connecting the flat slab 2 to the steel-pipe column main body 4 via the reinforcing body 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure of a steel pipe column and a flat slab and a joining method thereof.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional example of a joint structure of a steel pipe column and a flat slab. This joint structure 14
The flat slab 17 is supported by stiffening ribs 16 provided on the steel pipe column main body 15.

[0003]

However, the above-mentioned joining structure of the steel pipe column and the flat slab has the following problems. (1) When a horizontal force such as an earthquake is applied to the building, the concrete in contact with the steel pipe column body will be compressed and destroyed.
It was not possible to obtain sufficient deformation performance. (2) When transmission of a long-term vertical load from the flat slab to the steel pipe column main body cannot be sufficiently ensured, as shown in (2) and (3) of FIG. Therefore, it was necessary to thicken the flat slab.

The present invention has been made in view of the above problems, and an object thereof is a flat slab capable of sufficiently securing the proof stress of the joint portion with the minimum processing of the steel pipe column main body at the joint portion. To provide a joining structure and a joining method therefor.

[0005]

[Means for Solving the Problems] The joining structure of a steel pipe column and a flat slab, which is a means for achieving the above-mentioned problems,
A reinforcing body formed by joining an upper plate and a lower plate with a vertical plate is installed in a steel pipe column body, and a flat slab is joined to the steel pipe column body via the reinforcing body. The invention of claim 2 is characterized in that, in claim 1, the steel pipe column main body is inserted into the opening of the reinforcing body, and the reinforcing body is supported by the stiffening ribs provided on the steel pipe column main body. Further, the invention of claim 3 is characterized in that, in claim 1 or 2, slab muscles penetrate through the vertical plate. Further, in the method for joining a steel pipe column and a flat slab according to claim 4, the upper plate and the lower plate having the opening are joined by a vertical plate to form a reinforcing body, and the steel pipe column main body is inserted into the opening. It is characterized in that the reinforcing body is dropped, and the reinforcing body is supported by a stiffening plate provided on the steel pipe column main body, and then a slab form is formed and concrete is poured.

Even if a horizontal force such as an earthquake is applied to the building, it is possible to suppress the compressive failure of the concrete in contact with the steel pipe column main body, and it is possible to obtain sufficient deformation performance. Since the shear area of concrete can be increased by enlarging the reinforcing body, it is possible to transmit a long-term vertical load from the flat slab to the steel pipe column body without thickening the flat slab. Since the reinforcing body is supported by the stiffening ribs, it can be easily attached to the steel pipe column body.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a joining structure for a steel pipe column and a flat slab and a joining method thereof according to the present invention will be described below. First, an embodiment of a joint structure of a steel pipe column and a flat slab (hereinafter simply referred to as a flat slab joint structure) will be described, and thereafter, a method of joining a steel pipe column and a flat slab (hereinafter simply referred to as a flat slab joining method) will be performed. The form will be described. In each of these embodiments, the same configurations will be described with the same reference numerals, and different configurations will be described with different reference numerals.

1 to 3 show a flat slab joining structure 1 according to the first embodiment, in which a flat slab 2 is joined to a steel pipe column main body 4 via a reinforcing body 3. The reinforcing body 3 is formed by joining an upper plate 6 having an opening 5 and a lower plate 7 with a vertical plate 8, and the steel pipe column main body 4 is inserted into the opening 5. The reinforcing body 3 is not welded to the steel pipe column body 4 but is supported only by the stiffening ribs 9, and the vertical plate 8 is penetrated by the slab muscles 10. Therefore, since the flat slab 2 in contact with the steel pipe column main body 4 is reinforced by being sandwiched between the upper and lower plates 6 and 7, as shown in FIG. It could be made larger than 3).

FIG. 5 shows a flat slab joining structure 12 according to the second embodiment. Joining of the flat slab according to the first embodiment except that the steel pipe column main body 4 has a plane circular shape. It has the same configuration as the structure 1 and has the same effect.

Next, a method of joining flat slabs will be described. First, the reinforcing body 3 is dropped into the steel pipe column main body 4 erected on the foundation. This dropping is performed by inserting the steel pipe column main body 4 into the opening 5 of the reinforcing body 3 lifted by a crane, and is supported only by the stiffening rib 9 provided on the steel pipe column main body 4 without welding. The reinforcing body 3 may be installed in the steel pipe column main body 4 in advance in a factory. Next, the slab muscles 10 are arranged to penetrate the vertical plate 8 around the steel pipe column main body 4 and form a slab form (not shown).

Next, concrete is poured into the slab formwork, and after the concrete is hardened, the formwork is disassembled to construct the flat slab 2 reinforced by the reinforcing body 3. The flat slab 2 is joined by the same method in the case of the steel pipe column main body 4 having a circular plane.

[0012]

[Effects of the Invention] Even if a horizontal force such as an earthquake acts on a building,
It is possible to suppress the compressive failure of the concrete in contact with the steel tube column body, and it is possible to obtain sufficient deformation performance.

Since the shearing area of the concrete can be increased by enlarging the reinforcing body, it is possible to transmit a long-term vertical load from the flat slab to the steel pipe column body without increasing the thickness of the flat slab.

Since the reinforcing body is supported by the stiffening ribs,
It can be easily attached to the steel pipe column body.

[Brief description of drawings]

FIG. 1 is a front view of a flat slab joining structure according to a first embodiment.

FIG. 2 is a plan view in which a reinforcing body is joined to a steel pipe column main body.

FIG. 3 is a perspective view in which a reinforcing body is joined to a steel pipe column main body.

4 (1) and (2) are a sectional view and a plan view showing a shear fracture surface of the flat slab according to the first embodiment.

FIG. 5 is a plan view of a flat slab joining structure according to a second embodiment.

FIG. 6 (1) is a cross-sectional view of a conventional flat slab joining structure, and (2) and (3) are conceptual diagrams showing a shear fracture surface of a conventional flat slab.

[Explanation of symbols]

1, 12, 14 Flat slab joint structure 2,17 flat slab 3 Reinforcement 4,15 Steel pipe column body 5 openings 6 Upper plate 7 Lower plate 8 vertical plates 9, 16 Stiffening rib 10 slab muscle 11, 18 Shear fracture surface

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yasuhiro Oda             Tochigi Prefecture Nasu-gun Nishinasuno-cho 4 Ward-cho 1534-1             Goyo Construction Co., Ltd. Technical Research Center (72) Inventor Masaki Takiguchi             Tochigi Prefecture Nasu-gun Nishinasuno-cho 4 Ward-cho 1534-1             Goyo Construction Co., Ltd. Technical Research Center (72) Inventor Koichiro Miyara             Tochigi Prefecture Nasu-gun Nishinasuno-cho 4 Ward-cho 1534-1             Goyo Construction Co., Ltd. Technical Research Center

Claims (4)

[Claims] 1. A reinforcing body formed by joining an upper plate and a lower plate with a vertical plate is installed in a steel pipe column main body, and a flat slab is joined to the steel pipe column main body through the reinforcing body. A joint structure of steel pipe columns and flat slabs. 2. The steel pipe column according to claim 1, wherein the steel pipe column main body is inserted into the opening of the reinforcing body, and the reinforcing body is supported by stiffening ribs provided on the steel pipe column main body. Slab joint structure. 3. The joint structure of a steel pipe column and a flat slab according to claim 1 or 2, wherein a slab streak is penetrated through the vertical plate. 4. An upper plate having an opening and a lower plate are joined by a vertical plate to form a reinforcing body,
A steel pipe pillar main body is inserted into the opening to drop a reinforcing body, and the reinforcing body is supported by a stiffening plate provided in the steel pipe pillar main body, and then a slab form is formed and concrete is poured. Method for joining steel pipe columns and flat slabs.