JP2002070164A - 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 capable of sufficiently securing the yield strength of a junction. SOLUTION: In this connecting structure for a steel pipe column and the flat slab, connecting bars 5 are horizontally and radially protruded on the peripheral face of the steel pipe column 2, slab bars 4 are superimposedly arranged on the connecting bars 5, and the flat slab 3 is connected.

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. 9 shows a conventional example of a joint structure between a steel pipe column and a flat slab. This is steel pipe column 19
The flat slab 21 is formed by the flange 20 provided on the outer peripheral surface of the
Are supported, and the reinforcing bar 21 of the flat slab 21 is
Since a was not arranged inside the steel pipe column 19, the capital 22 and the drop panel 23 were provided at 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 unless the slab around the column is made thicker, the strength of the joint cannot be sufficiently secured. .

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a flat slab joining structure and a joining method thereof capable of sufficiently securing the strength of a joining portion.

[0005]

In order to achieve the above object, a connecting structure of a steel pipe column and a flat slab according to the first aspect of the present invention is provided by connecting a connecting bar projecting radially from a peripheral surface of the steel pipe column. The connecting bar and the slab bar are overlapped and arranged to join the flat slab, and the joint structure between the steel pipe column and the flat slab according to the second aspect of the present invention is characterized in that:
In, the connecting bars are provided via an upper flange and a lower flange protruding at appropriate intervals on the peripheral surface of the steel pipe column,
Further, the joint structure of the steel pipe column and the flat slab according to the invention of claim 3 is that, in claim 1 or 2, the connecting bar is provided over an upper flange and a lower flange protruding from the peripheral surface of the steel pipe column at appropriate intervals. The method for joining a steel pipe column and a flat slab according to the invention of claim 4 is characterized in that a plurality of steel pipe columns having connecting bars projecting radially in a plane at joints of the flat slab are erected, and the connecting bars are connected to the slab bars. It is characterized in that a flat slab is constructed by overlapping and reinforcing.

[0006] Since the connecting reinforcement of the steel pipe column and the slab reinforcement are overlapped and arranged to join the flat slab, the rigidity at the joint between the steel pipe column and the flat slab is enhanced.

[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 shows a joint structure of a flat slab according to a first embodiment. The joint structure 1 of the flat slab is such that a flat slab 3 is integrated with a steel pipe column 2 which is erected at appropriate intervals. The connection reinforcement 5 of the steel pipe column 2 is overlapped and arranged on the slab reinforcement 4 of the flat slab 3.

The connecting bars 5 which are bent in a U-shape are welded over the upper flange 6 and the lower flange 7 of the steel pipe column 2 and are attached in a plane radial manner (12 lines). Since the connecting bar 5 is thus welded to the upper flange 6 and the lower flange 7, it can be easily attached to the steel pipe column 2. This is not limited to 12, but may be more or less. Further, the connecting bar 5 may have a joint structure as shown in FIG.

As described above, since the connecting bars 5 are U-shaped and project radially, the slab bars 4 are inserted inside the connecting bars 5 to join the flat slabs 3 in a well-balanced manner. The upper flange 6 and the lower flange 7 serve to improve the shear strength of the joint (see FIG. 3).

FIG. 4 shows a flat slab joint structure 8 according to a second embodiment. The flat slab according to the first embodiment is different from the flat slab according to the first embodiment except that a connecting bar is replaced by a straight bar 9 from a U-shape. It is the same as the joining structure 1 of the slab. Twelve straight bars 9 are welded in the same position of the upper and lower flanges 6 and 7 in a plane radial manner, and are arranged so as to overlap with the slab bar 4. Further, the straight streaks 9 may have a joint structure as shown in FIG.

FIG. 5 shows a flat slab joining structure 18 according to a third embodiment, in which a U-shaped slab stud 4 and a connecting stud 5 are overlapped and arranged to form a hoop 4a.
A ring reinforcement 4b is arranged therein, and a U-shaped reinforcement 5a is arranged between the slab reinforcement 4 and the connecting reinforcement 5.

Although the flat slab 3 is constructed of a precast concrete slab (hereinafter simply referred to as a PC slab) 10, it can also be constructed of cast-in-place concrete (not shown).

Next, a method for joining flat slabs according to the first embodiment will be described with reference to FIGS. In this joining method, a PC floor plate 13 is used in which connecting slab streaks 12 project from the joining notches 11 at the four corners (FIG. 7).
However, the connecting slab streaks 12 are connected to the joint notches 11.
Since it can be screwed into the sleeve 14 buried in the groove, it is removed from the joint notch 11 during transportation.

First, a steel pipe column 2 provided with connecting bars 5 at the joints of the flat slabs 3 on each floor is manufactured (see FIG. 2). Are provided at three places.

Next, as shown in FIG. 7, the steel pipe columns 2 are erected at predetermined positions, and P
When the C floor plate 13 is installed, a column floor joint 15 is formed around the steel pipe column 2 by the joint notch 11. Next, the connecting slab streaks 1 are attached to the sleeve 14 of the joining notch 11.
2 is screwed in so as to overlap with the twelve connecting bars 5 (see FIG. 6).

After the rebar arrangement is completed, as shown in FIG. 8, a formwork 16 is assembled and formed on the column-bed joint portion 15, and concrete 17 is cast on the formwork 16 and the steel pipe column 2. The flat slab 3 shown in FIG.

The flat slabs 8 and 18 of the second and third embodiments are constructed and
Is also constructed in substantially the same manner as described above (not shown).

[0019]

According to the present invention, since the connecting reinforcement of the steel pipe column is superposed on the slab reinforcement, the rigidity of the joint between the steel pipe column and the flat slab can be increased.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view of a flat slab joint structure according to a first embodiment, and FIG. 1B is a cross-sectional view showing another joint structure of a connecting bar.

FIG. 2 (1) is a front view of a steel pipe column, and (2) is B of (1).
FIG. 4 is a cross-sectional view taken along line B.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4A is a sectional view of a flat slab joint structure according to a second embodiment, and FIG. 4B is a sectional view showing another joint structure of a straight line.

FIG. 5A is a cross-sectional view of a flat slab joining structure according to a second embodiment, and FIG. 5B is a cross-sectional view taken along line CC of FIG.

FIG. 6 shows a method of joining flat slabs, in which P is added to a steel pipe column.
It is the longitudinal cross-sectional view which installed C floor board.

FIG. 7 is a sectional view taken along line DD of FIG. 6;

FIG. 8 is a cross-sectional view showing a method of joining flat slabs, in which a formwork is assembled and formed at a column-bed joint portion.

FIG. 9 is a cross-sectional view of a conventional flat slab joining structure.

[Explanation of symbols]

 1, 8, 18 Connection structure of flat slab 2, 19 Steel pipe column 3, 21 Flat slab 4 Slab bar 5 Connecting bar 6 Upper flange 7 Lower flange 9 Straight bar 10, 13 PC floor plate 11 Notch for connection 12 Connecting slab bar 14 Sleeve 15 Pillar joint 16 Formwork 17 Concrete 20 Flange 22 Capital 23 Drop panel

Continued on the front page (72) Inventor Yoshiyuki Murata 1534-1, Yotsumachi, Nishinasuno-cho, Nasu-gun, Tochigi Prefecture Within Goyo Construction Co., Ltd. -1 Goyo Construction Co., Ltd. Technical Research Institute F-term (reference) 2E163 FA02 FB06 FB41 FF13 FF17

Claims (4)

[Claims] 1. A steel pipe column and a flat slab, characterized in that connecting steel bars are projected on the peripheral surface of the steel pipe column in a plane radial manner, and the connecting steel bar and the slab bar are overlapped and arranged to join the flat slab. Joint structure. 2. The joint structure between a steel pipe column and a flat slab according to claim 1, wherein the connecting bars are provided through upper and lower flanges projecting from the peripheral surface of the steel pipe column at appropriate intervals. 3. The joint structure between a steel tube column and a flat slab according to claim 1, wherein the connecting bar is provided over an upper flange and a lower flange projecting from the peripheral surface of the steel tube column at appropriate intervals. . 4. A flat slab is constructed by arranging a plurality of steel pipe columns having connecting bars projecting radially in a plane at a joint of a flat slab, and superposing and arranging the connecting bars on the slab bars. How to join steel pipe columns and flat slabs.