JP2002070165A - Connecting structure for steel pipe column and flat slab and its connecting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting structure for a flat slab and its connecting method minimizing the machining of a steel pipe at a connection portion and capable of sufficiently securing the yield strength of a junction. SOLUTION: In this connecting structure 1 for a steel pipe column and the flat slab, the steel pipe 6 of the upper story and the steel pipe 7 of the lower story cut off at the connection position of the flat slab 5 are connected by a connecting plate 8 at a prescribed gap section 3, and slab reinforcing bars 4 are arranged in the gap section 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a joint structure between a steel pipe column and a flat slab and a joining method therefor.

[0002]

2. Description of the Related Art FIG. 7 shows a conventional example of a joint structure between a steel pipe column and a flat slab. This is steel pipe column 13
The flat slab 15 is formed by the flange 14 provided on the outer peripheral surface of the
Are supported, and the reinforcing bars 15 of the flat slab 15 are supported.
Since a was not arranged inside the steel pipe column 13, the capital 16 and the drop panel 17 were provided on the column head.

[0003]

However, in the above-described joint structure between the steel pipe column and the flat slab, there is a problem that the slab around the column cannot be sufficiently secured unless the slab around the column is made thicker. there were.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to minimize the processing of a steel pipe at a joint portion and to assure a sufficient joint strength of a flat slab. It is to provide a structure and a joining method thereof.

[0005]

In order to achieve the above object, the present invention is characterized in that the joint structure between the steel pipe column and the flat slab according to the first aspect of the present invention is a steel pipe on the upper floor separated at the joint of the flat slab. The steel pipe on the lower floor is joined by a connecting plate with a predetermined gap, and a slab reinforcing bar is arranged in the gap, and the joint structure between the steel pipe column and the flat slab according to the invention of claim 2 is: In claim 1, the connection plate is provided such that the connection plate on the inner surface side of the steel pipe on the upper and lower floors and the connection plate on the outer surface side of the steel pipe on the upper and lower floors are opposed to each other, and the steel pipe on the upper and lower floors is interposed between these connection plates. A reinforcing plate for transmitting the axial force of the steel pipe is provided, and the joint structure of the steel pipe column and the flat slab according to the invention of claim 3 is the same as that of claim 1 or 2, wherein the gap between the steel pipe column and the flat slab is provided. Cross over The method for joining a steel pipe column and a flat slab according to the invention of claim 4 is characterized in that the steel pipe on the upper floor and the steel pipe on the lower floor are vertically separated at the joint of the flat slab. A plurality of steel pipe columns joined by a connecting plate with a predetermined gap, and a flat slab is constructed by arranging slab reinforcing bars in the gap.

[0006] Since the slab reinforcing bars are arranged inside the steel pipe columns,
The rigidity and ultimate strength at the joint between the steel pipe column and the flat slab are increased.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a joint structure of a steel pipe column and a flat slab according to the present invention; First, an embodiment of a joint structure between a steel pipe column and a flat slab (hereinafter, simply referred to as a joint structure of a flat slab) will be described, and thereafter, a joint method of a steel pipe column and a flat slab (hereinafter, simply, a joint method of a flat slab) will be described. The form will be described. In each of these embodiments, the same configuration will be described with the same reference numerals, and only different configurations will be described with different reference numerals.

FIG. 1 is a sectional view showing a joint structure 1 of a flat slab. In the joint structure 1 of the flat slab, a slab reinforcing bar 4 is arranged in a gap 3 with steel pipe columns 2 erected at appropriate intervals. The crimped flat slab 5 is integrally joined.

As shown in FIG. 2, the steel pipe column 2 has a gap 3 between the steel pipe 6 on the upper floor and the steel pipe 7 on the lower floor separated at the joint of the flat slab 5, that is, the thickness H of the flat slab. It is joined by eight sets of connecting plates 8 with a slightly smaller gap 3. The connection plate 8 is a pair of two plates, which are sandwiched between the steel pipes 6 and 7 on the upper and lower floors from the inner and outer surfaces and joined by high strength bolts 9. Accordingly, the gap 3 is formed at the joint of the flat slab 5 on each floor in the steel pipe column 2. The number of the connection plates 8 is not limited to eight, and may be more or less.

FIG. 3 is a cross-sectional view in which a slab reinforcing bar 4 is arranged in the gap 3 of the steel pipe column 2. The longitudinal and horizontal slab reinforcing bars 4 are arranged so as to penetrate the gap 3. ,
The flat slab 5 can be joined without using a capital or a drop panel. The slab reinforcing bar 4 arranged in the gap 3 may be a single slab reinforcing bar. However, when the connecting bar 10 for easily arranging the reinforcing bar is used, the slab reinforcing bar 4 is superposed on the slab reinforcing bar 4 ((2) in FIG. 3). reference).

In FIG. 1, the joining structure of the flat slab in which the slab reinforcing bar 4 penetrates through the gap 3 has been described, but as shown in FIG.
a can be fixed in the steel pipe column 2.

FIG. 5 shows a reinforcing plate 8a sandwiched between two connecting plates 8, and a steel plate 8b extending between the inside of the steel pipe column 2 and the flat slab 5 in the gap portion 3. The buckling of the steel column 2 is prevented, and the flat slab 5 is reinforced by shearing.

The flat slab 5 can be constructed of a precast concrete slab (hereinafter simply referred to as a PC slab) instead of being constructed with cast-in-place concrete. 1
After arranging the reinforcing steel 0, concrete 11 is added to the steel pipe column 2 and the floor.
Is installed. Moreover, in the case of PC floorboard, after arranging the slab reinforcing bar 4 or the connecting bar 10 in the gap part 3, the steel pipe column 2
Concrete is poured into the joint between the steel pipe column 2 and the PC floorboard (not shown).

Next, a method for joining flat slabs constructed with cast-in-place concrete will be described with reference to FIG. First, the steel pipe column 2 in which the gap 3 is formed at the joint of the flat slab 5 is manufactured (see FIG. 2). Therefore,
For example, three gaps 3 are formed in a three-layer, one-section steel pipe column.

Next, these steel pipe columns 2 are erected at predetermined positions, and a formwork 12 for a flat slab on the first floor is assembled between the steel pipe columns 2. Then, the vertical and horizontal slab reinforcing bars 4 are inserted into the formwork 12 with the gaps 3 of the steel pipe columns 2.
And penetrate the reinforcement. As described above, a single slab reinforcing bar 4 or a connecting bar 10 is used to arrange the reinforcing bars in the gap 3.

After such reinforcement is finished, concrete 11 is cast on the formwork 12 and the steel pipe column 2 to construct the flat slab 5 shown in FIG. The concrete 11 is cast on the steel column 2 slightly above the flat slab 5.

When the flat slab 5 is constructed of a PC floorboard, it is constructed in substantially the same manner as described above.
Instead of placing concrete 11 on steel pipe 2, steel pipe column 2 and P
The only difference is that it is cast at the joint between the C floor plate (not shown).

[0018]

According to the present invention, since the slab reinforcing bars are arranged so as to penetrate through the gaps between the steel pipe columns, the rigidity and ultimate strength of the joint between the steel pipe columns and the flat slab can be enhanced.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view of a flat slab joining structure, and FIG. 1B is a cross-sectional view taken along line AA of FIG.

FIG. 2 (1) is a front view of a steel pipe column, and (2) is B of (1).
FIG. 3B is a sectional view taken along line B, and FIG. 3C is an enlarged sectional view of a main part.

3A is a sectional view of a steel pipe column in which a reinforcing bar is arranged in a gap, and FIG. 3B is a sectional view taken along line CC of FIG. 3A.

FIG. 4A is a cross-sectional view of a joint structure of a flat slab,
(2) is a sectional view taken along line DD of (1).

FIG. 5 is a cross-sectional view of a flat slab joining structure,
(2) is a sectional view taken along line EE of (1).

FIG. 6 is a sectional view of a flat slab joining method.

FIG. 7 is a sectional view of a conventional flat slab joining structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joining structure of flat slab 2, 13 Steel pipe pillar 3 Gap part 4 Slab reinforcing bar 5, 15 Flat slab 6 Steel pipe on upper floor 7 Steel pipe on lower floor 8 Connecting plate 9 High strength bolt 10 Connecting bar 11 Concrete 12 Formwork 14 Flange 16 Capital 17 Drop Panel

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshiyuki Murata 1534-1, Yosuku-cho, Nishinasuno-cho, Nasu-gun, Tochigi Prefecture Goyo Construction Co., Ltd. 154-1 Ku-machi Goyo Construction Co., Ltd. Technical Research Institute F-term (reference) 2E163 FA02 FB06 FB41 FF13 FF17

Claims (4)

[Claims] The steel pipe on the upper floor and the steel pipe on the lower floor separated at the joint of the flat slab are joined by a connecting plate with a predetermined gap, and slab reinforcing bars are arranged in the gap. Steel tube column and flat slab joint structure. 2. The connecting plate is provided such that a connecting plate on the inner surface side of the steel pipe on the upper and lower floors and a connecting plate on the outer surface side of the steel pipe on the upper and lower floors are opposed to each other, and the steel pipe on the upper and lower floors is interposed between these connecting plates. The joint structure between a steel pipe column and a flat slab according to claim 1, wherein a reinforcing plate for transmitting the axial force is provided. 3. The joint structure between a steel pipe column and a flat slab according to claim 1, wherein a shear reinforcing member extending between the inside of the steel pipe and the slab is disposed in the gap. 4. A plurality of steel pipe columns in which a steel pipe on an upper floor and a steel pipe on a lower floor which are vertically separated at a joint of a flat slab are joined by a connecting plate with a predetermined gap, and are inserted into the gap. A method for joining a steel pipe column and a flat slab, wherein the flat slab is constructed by arranging slab reinforcing bars.