JPH09317009A - Joint structure for concrete-filled steel pipe column with beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow an easy jointing work by jointing a square steel pipe to a beam steel frame, inserting a concrete-filled steel pipe column in the square steel pipe, and filling a gap between the square steel pipe and the concrete-filled steel pipe column with mortar. SOLUTION: A joint element 21 formed out of joint steel frames 22 welded to both outer surfaces of a square steel pipe 20 is laid as a beam joint part on the upper end of a lower concrete-filled steel pipe column 11. Then, the upper end of a steel pipe 12 used for the lower concrete-filled steel pipe column 11 is inserted in the lower half part of the square steel pipe 20. Subsequently, the lower end of a steel pipe 12 for the concrete-filled steel pipe column 11 is inserted in the upper half part of the square steel pipe 20, thereby abutting the upper and lower steel pipes 12 to each other. Then, the steel pipes 12 are filled with concrete 13, and mortar is fed to and cured in a gap between the steel pipes 12 for the concrete-filled steel pipe columns 11 and the square steel pipe 20. Thereafter, a beam steel frame 23 is welded and jointed to the jointing steel frames 22 of the joint element 21, thereby completing a joint between the column 11 of circular cross section and the beam steel frame 23. As a result, workability is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of a filled steel pipe concrete column and a beam in which a steel pipe is filled with concrete.

[0002]

2. Description of the Related Art As is well known, a filled steel pipe concrete structure is a kind of steel-concrete composite structure in which the inside of a steel pipe is filled with concrete, and has recently been widely adopted as a structure for high-rise buildings. The following is conventionally known as a column in such a filled steel pipe concrete structure, that is, a joint structure of a filled steel pipe concrete column and a beam formed by filling concrete in a steel pipe.

In the structure shown in FIG. 4, when joining the filled steel pipe concrete column 1 in which the concrete 3 is filled in the rectangular steel pipe 2 and the beam steel frame 5, the metal fitting 6 at the end of the beam steel frame 5 is joined.
By tightening the metal fitting arranged inside the steel pipe 2 with a bolt penetrating the steel pipe 2, the steel pipe 2 is sandwiched between the inner and outer metal fittings 6 and 7, and the concrete 3 is placed in that state. The filled steel pipe concrete pillar 1 and the beam steel frame 5 are joined.

Further, in the structure shown in FIG. 5, the circular steel pipe 12
In joining the filled steel tube concrete column 11 filled with concrete 13 and the reinforced concrete beam 15, inside the beam joint part, a part of the main bar 16 of the beam 15 is penetrated into the steel tube 12 of the filled steel tube concrete column 11, The beam 15 and the pillar 11 are joined by placing concrete 13 inside the steel pipe 12 above.

[0005]

By the way, the structure of FIG. 4 is suitable for joining the filled steel pipe concrete column 1 and the beam using the square steel pipe 2, but the filled steel pipe concrete column and the beam having the circular cross section are used. Not applicable when joining.
Further, in the structure of FIG. 5, since it is necessary to penetrate a part of the main bars of the beam into the steel pipe 12 of the filled steel pipe concrete column 11,
There was a problem that the structure was complicated and workability was poor.

In view of the above circumstances, it is an object of the present invention to provide a joint structure of a filled steel pipe concrete column and a beam, which can easily join a circular filled steel pipe concrete column and a beam with a simple structure. .

[0007]

According to a first aspect of the present invention, in a joint structure of a filled steel pipe concrete column and a beam in which a circular steel pipe is filled with concrete, a square steel pipe is joined to the beam, and the square steel pipe is joined. The above-mentioned filled steel tube concrete column is inserted into the inside of the above, and a filler is filled in a gap between the square steel tube and the filled steel tube concrete column to be solidified.

According to a second aspect of the present invention, in the first aspect, the upper and lower filled steel pipe concrete columns to be joined vertically are inserted into a rectangular steel pipe, and ends are abutted in the rectangular steel pipe. Characterize.

According to a third aspect of the present invention, in the first or second aspect, a bolt is provided so as to penetrate through the steel pipe of the square steel pipe and the filled steel pipe concrete column, and the beam and the square steel pipe are joined by the bolt. And

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a joining structure according to the first embodiment. This joint structure has a steel pipe 12 with a circular cross section.
This is a structure in the case where the filled steel pipe concrete columns 11 filled with concrete 13 are vertically joined and simultaneously joined with the beam steel frame 23.

At the time of joining, as shown in FIG. 1 (a), a joining metal article 21 in which joining steel frames 22 are welded to both outer side surfaces of a rectangular steel pipe 20 is prepared. And this joining hardware 21
Is arranged as a beam connection part on the upper end of the lower filled steel pipe concrete column 11, and the upper end of the steel pipe 12 of the lower filled steel pipe concrete column 11 is inserted into the lower half of the square steel pipe 20. Next, the steel pipe 1 of the upper filled steel pipe concrete column 11
The lower end of 2 is inserted into the upper half of the rectangular steel pipe 20, and the upper and lower steel pipes 12 are butted. Then, in this state, the inside of the steel pipe 12 is filled with concrete 13, and the gap between the steel pipe 12 and the square steel pipe 20 of the filled steel pipe concrete column 11 is filled with mortar (filler) 25 and solidified.

Finally, the beam steel frame 23 is joined to the joining steel frame 22 of the metal joint 21 by welding or the like, thereby completing the joining of the filled steel pipe concrete column 11 having a circular cross section and the beam steel frame 23.

In this structure, a concrete column 1 with a filled steel tube having a circular cross section is inserted through a square steel tube 20 which is easily joined to a steel frame.
Since 1 and the beam are joined, as a work, the filled steel pipe concrete pillar 11 is inserted into the inside of the rectangular steel pipe 20, and the concrete 13 and the mortar 25 are simply placed.
Columns and beams can be easily joined. Moreover, since the upper and lower columns can be joined by simply abutting the upper and lower filled steel pipe concrete columns 11 to be joined in the rectangular steel pipe 20, the structure is simple and the workability is good.

As in the embodiment of FIG. 3, the beam steel frame 2
A flange 24 is provided at the end of 3 and the nuts after solidification of the concrete 13 and the mortar 25 are attached to the threaded portions 27a and 27a at both ends of the bolt 27 that penetrates the square steel pipe 20 and the steel pipe 12 of the filled steel pipe concrete column 11. By fastening, the beam steel frame 23 and the square steel pipe 2 via the flange 24.
You may join 0. By doing so, the beam steel frame 23 and the filled steel pipe concrete column 11 can be joined without welding.

[0015]

As described above, according to the first aspect of the present invention, the filled steel pipe concrete column having the beam and the circular cross section can be obtained only by inserting the filled steel pipe concrete column into the square steel pipe and filling the filling material. And can be easily joined without welding. Further, as in the invention of claim 2, if the upper and lower filled steel pipe concrete columns are abutted in the rectangular steel pipe,
At the same time, the upper and lower columns can be made continuous, and the structure is simple and workability is good. Further, as in the invention of claim 3, when the beam is joined by the bolt penetrating the steel pipe of the square steel pipe and the filled steel pipe concrete column, welding is not required at all,
Workability can be further improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention, in which (a) is a view before assembly and (b) is a view after assembly.

FIG. 2 is a plan view of the first embodiment of the present invention.

FIG. 3 is a horizontal sectional view of an essential part of a second embodiment of the present invention.

FIG. 4 is a diagram showing an example of a conventional joining structure.

FIG. 5 is a diagram showing another example of a conventional joining structure.

[Explanation of symbols]

 11 Filled Steel Tube Concrete Column 12 Steel Tube 13 Concrete 20 Square Steel Tube 23 Beam Steel 25 Mortar (Filler) 27 Bolt

Claims (3)

[Claims] 1. In a joint structure of a filled steel pipe concrete column and a beam, wherein a circular steel pipe is filled with concrete, a rectangular steel pipe is joined to the beam, and the filled steel pipe concrete column is inserted into the rectangular steel pipe. At the same time, a joint structure of a filled steel tube concrete column and a beam is characterized in that a filling material is filled in a gap between the rectangular steel tube and the filled steel tube concrete column and solidified. 2. The upper and lower filled steel pipe concrete columns to be joined vertically are inserted into the rectangular steel pipe, and ends are abutted in the rectangular steel pipe.
Joint structure of filled steel pipe concrete column and beam described. 3. A bolt is provided so as to penetrate through the steel pipe of the square steel pipe and the filled steel pipe concrete column, and the beam and the square steel pipe are joined by the bolt.
Alternatively, the joint structure of the filled steel pipe concrete column and the beam according to item 2.