JPH04350228A - Connection section and connecting metal between steel pipe pillar and beam - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for joining a steel pipe column and a beam of a reinforced concrete structure or a steel-framed reinforced concrete structure.

0002

2. Description of the Related Art FIG. 7 shows an example of a conventional joint structure between a steel pipe column and a reinforced concrete beam or a steel reinforced concrete beam (see Japanese Patent Laid-Open No. 63-297642).

In this example, a through hole 23 is bored in the steel pipe constituting the steel pipe column 21, and the main reinforcement 22a of the beam 22 is inserted into the through hole 2.
Reinforcement is arranged through 3. A part of the main reinforcement 22a may be arranged along the outer periphery of the steel pipe without penetrating the steel pipe, but in this case as well, the main reinforcement at the center needs to pass through the through hole 23 drilled in the steel pipe.

[0004] Furthermore, the penetrating main reinforcing bars are fixed at both ends of the outer wall of the steel pipe using nuts 24 or the like to prevent them from coming off.

[0005]

[Problems to be Solved by the Invention] In the above conventional structure, the beam main reinforcements are crossed inside the steel pipe column, so the positions of the orthogonal beam main reinforcements are not aligned in the column axis direction, and the reinforced concrete beam Or the beam size of steel reinforced concrete beams increases unnecessarily.

[0006]Furthermore, reinforcing bars that intersect inside the steel pipe impede concrete placement inside the steel pipe column, causing a portion under the reinforcing bars to be incompletely filled with concrete.

Furthermore, it is necessary to drill a large number of holes in the steel pipe, which inevitably increases processing costs. In addition, since the steel pipe wall is perforated, cross-sectional defects occur, and the strength of the steel pipe column is significantly impaired.

[0008]Furthermore, even in the field, it is not easy to make the reinforcing bars penetrate the steel pipes and to process the reinforcing bars that do not penetrate the steel pipes in terms of labor.

The present invention is an attempt to solve the above-mentioned problems in the prior art.

0010

[Means for Solving the Problems] The joining hardware of the present invention has a reinforcing bar connection portion for connecting the main beam reinforcement on the outer periphery of a ring-shaped main body.

[0011] As the reinforcing bar connection part, the outer periphery of the ring-shaped joint metal body itself may be used as the connection part, or another connection member may be attached to the outer periphery by welding or the like. As the connection means, screws, welding, etc. are used.

[0012] In the joint between the steel pipe column and the beam of the present invention,
The upper and lower steel pipe members constituting the steel pipe column and the joint steel pipe at the beam joining position are butted and welded together via ring-shaped joining hardware. The main reinforcement of a beam in a reinforced concrete structure or a steel reinforced concrete structure is connected to this ring-shaped joint. Further, it is desirable to provide a shearing force transmitting member such as a stud bolt on the outer periphery of the joint steel pipe.

[0013] The ring-shaped joint usually has an inner protrusion and an outer protrusion, and the inner protrusion is provided to transmit the vertical load from the beam to the concrete filled inside the steel pipe column. If the transmission of this stress is expected to be due to the adhesion stress between the steel pipe and the concrete, the inner peripheral protrusion can be omitted. If the beam is of steel reinforced concrete structure,
H on the outer circumferential protrusion of the ring-shaped joint metal fitting with the reinforcing bar connection part.
Flanges of steel members such as sections can also be welded.

[0014]

[Operation] Since the main reinforcement of the beam is directly connected to the ring-shaped joint metal fitting of the high-rigidity joint part, stress transmission from the main reinforcement of the beam is reliable, and there is no cross-sectional loss in the steel pipe due to the through hole. The mechanical performance of the joint section is improved.

When applied to concrete-filled steel pipe columns,
Since the reinforcing bars do not penetrate the inside of the steel pipe, the concrete fillability is extremely good. In addition, since the positions (heights) of the main beam reinforcements relative to the material axis direction are the same in all the beams, the beam size does not increase unnecessarily, and a compact joint section can be constructed.

[0016]Furthermore, the work of arranging the beam main reinforcements on site becomes easier, and the workability is significantly improved.

[0017]

[Embodiment] Next, the illustrated embodiment will be explained.

FIG. 3 shows an example of a joining metal fitting when the steel pipe column has a circular cross section. Ring-shaped metal fitting 3
A plurality of coupler-like metal fittings 6 for joining the main beam reinforcements 2a are integrally formed on the outer peripheral protrusion 5 of the main body. A thread 6a is formed inside the coupler-like fitting 6 so that a threaded reinforcing bar used as the beam main reinforcement 2a can be screwed into the coupler-like metal fitting 6. In this case, the joining hardware is manufactured by forging or casting, and then the coupler-like metal fitting 6 is threaded.

FIG. 4 shows a joining hardware in case the steel pipe column has a rectangular cross section, and the basic structure is the same as the embodiment shown in FIG.

FIG. 5 shows a case in which a coupler-like metal fitting 6 for connecting the main beam reinforcing bars 2a and a ring-shaped joint metal fitting 3 body are manufactured separately, and the coupler-like metal fitting 6 is later attached to the joint metal fitting 3 body by welding 7. This figure shows an example of this. Also in this embodiment, a thread 6a is formed inside the coupler-like metal fitting 6 to be screwed into the threaded reinforcing bar.

FIG. 6 shows a semi-annular fitting 8 connected to a ring-shaped joining fitting 3.
This figure shows an example in which the device is attached to the main body of the device by welding. In this embodiment, the beam main reinforcement 2a does not need to be a threaded reinforcing bar, and as shown in the figure, the beam main reinforcement 2a is placed on the semi-annular metal fitting 8.
A is temporarily placed, and then the main reinforcing bars 2a are fixed by welding 9.

FIG. 1 shows an example of a joint between a steel pipe column 1 and a beam 2 using a ring-shaped joint 3 when the beam is made of reinforced concrete. The joint steel pipes 1a are joined using the joining hardware 3 shown in FIG.

In this embodiment, stirrup reinforcements 2b are attached to the beam main reinforcement 2a joined to the coupler-like fittings 6, and a reinforced concrete beam 2 is constructed by pouring concrete 2c. A shear force transmitting member such as a stud bolt 10 is provided on the outer surface of the joint portion steel pipe 1a in order to transmit the shear force from the beam 2.

[0024] The hoop reinforcement 11 placed on the outside of the joint steel pipe 1a is placed for the purpose of stiffening the column-beam joint, especially when the beam width is large relative to the steel pipe diameter, and is therefore omitted. It is also possible to do so.

FIG. 2 shows an example of a joint between a steel pipe column 1 and a beam 2 using a ring-shaped joint 3 when the beam is made of steel-framed reinforced concrete. It is joined.

In this embodiment, H-shaped steel 2d is used as a steel frame member.
The flange is welded to the outer peripheral protrusion 5 of the joining hardware 3, and the web is welded to the joint steel pipe 1a. Stirrup reinforcements 2b are attached to beam main reinforcements 2a joined to coupler-like fittings 6, and reinforced steel frame concrete beams 2 are constructed by pouring concrete 2c. Similar to the embodiment shown in FIG. 1, a shear force transmitting member such as a stud bolt 10 is provided on the outer surface of the joint portion steel pipe 1a in order to transmit the shear force from the beam 2.

Furthermore, in the embodiment shown in FIGS. 1 and 2, the steel pipe column 1
Concrete 12 is poured inside to form a filled concrete steel pipe column, but pouring of concrete 12 can also be omitted.

Furthermore, the reinforced concrete beams and steel reinforced concrete beams shown in FIGS. 1 and 2 may be so-called precast members manufactured in advance at a factory or the like. In that case, from the end of the precast member to the main beam reinforcement 2a
The ends of the beams are made to protrude, and after connecting beam main reinforcements 2a, etc. on site, concrete is poured at the joints to integrate them.

[0029]

According to the present invention, the beam main reinforcement can be easily connected to the reinforcing bar connection portion provided on the ring-shaped joining metal fitting, and the efficiency of reinforcement work on site can be significantly improved.

Furthermore, since the beam main reinforcement is directly connected to the highly rigid ring-shaped joint metal fitting, the stress of the beam main reinforcement is reliably and clearly transmitted to the column, resulting in a compact column-beam joint with high strength and rigidity. can be realized.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the joint between a steel pipe column and a beam according to the present invention, in which (a) is a horizontal cross-sectional view and (b) is a vertical cross-sectional view.

FIG. 2 shows another embodiment of the joint between a steel pipe column and a beam according to the present invention, in which (a) is a horizontal cross-sectional view and (b) is a vertical cross-sectional view.

FIG. 3 shows an embodiment of the joint metal fitting of the present invention.
(a) is a plan view, and (b) is an elevation view (the right half is a sectional view).

FIG. 4 shows another embodiment of the joint metal fitting of the present invention, in which (a) is a plan view, and (b) is an elevational view (the right half is a sectional view).

FIG. 5 is an elevational view (the right half is a sectional view) showing still another embodiment of the joint metal fitting of the present invention.

FIG. 6 is an elevational view (the right half is a sectional view) showing still another embodiment of the joint metal fitting of the present invention.

FIG. 7 is a horizontal sectional view showing a conventional example.

[Explanation of symbols]

1... Steel pipe column, 1a... Connection section steel pipe, 2... Beam, 2a... Main bar,
2b...Stirrup reinforcement, 2c...Concrete, 2d...H
Shaped steel, 3... Joining hardware, 4... Inner periphery protrusion, 5... Outer periphery protrusion, 6... Coupler-shaped fitting, 6a... Thread, 7... Welding, 8...
Semi-ring metal fitting, 9...welding, 10...stud bolt, 11...
Hoop reinforcement, 12...filling concrete

Claims (5)

[Claims] Claim 1: At a joint between a steel pipe column made of a steel pipe member and a beam of a reinforced concrete structure or a steel-frame reinforced concrete structure, the upper and lower steel pipe members constituting the steel pipe column and the joint steel pipe at the beam joint position are connected to a ring-shaped body. A joint between a steel pipe column and a beam, characterized in that the main reinforcement of the beam is connected to the outer periphery of the ring-shaped main body. 2. The joint between a steel pipe column and a beam according to claim 1, wherein a shear force transmitting member is provided on the outer periphery of the joint steel pipe. 3. The joint between a steel pipe column and a beam according to claim 1, wherein the main reinforcement of the beam is joined to the outer periphery of the ring-shaped main body by welding. [Claim 4] A reinforcing bar connection part for joining the main bar end of a beam of a reinforced concrete structure or a steel reinforced concrete structure is formed on the outer periphery of the ring-shaped main body to which the ends of the upper and lower steel pipe members constituting the column are joined. A joining hardware for steel pipe columns and beams. 5. The steel pipe according to claim 4, wherein the main reinforcing bars of the beams are threaded at least at their ends, and the reinforcing bar connecting portions are made of coupler-like metal fittings having threaded holes into which the ends of the main reinforcing bars can be screwed. Column and beam joint hardware.