JPH0742730B2 - Column-beam joint structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a column that can reinforce a joint between a steel frame column and a steel beam made of a closed cross-section material such as a rectangular steel pipe or a circular steel pipe without cutting the column. -It relates to the beam joint structure.

[Conventional technology]

Generally, a diaphragm is installed at a joint between a steel column and a steel beam for the purpose of smooth transmission of stress in the column-beam joint and reinforcing this portion.

Conventionally, as a typical method for installing this diaphragm, a column is cut at the upper and lower flanges of the beam, and a diaphragm is installed at this cut portion. An inner diaphragm method that cuts near the center and installs diaphragms at the upper and lower flanges of the beam inside this pillar.In addition, an outer diaphragm method that installs the diaphragm around the pillar without cutting the pillar (both pillar penetration method There is).

[Problems to be Solved by the Invention]

However, each of the above methods has various construction defects.

That is, the above two methods have a drawback that it is necessary to cut and rejoin the column once, so that it takes extra time and labor to process the joint portion, and it becomes difficult to secure the precision of the column. .

On the other hand, the latter method has the drawbacks that not only the welding amount of the diaphragm is large, but also the processing is troublesome.

The present invention has been proposed in order to eliminate the above-mentioned conventional drawbacks, and an object thereof is to provide a column / beam joint structure capable of easily reinforcing a column / beam joint. is there.

[Means for solving problems]

The present invention relates to a column-beam joint structure capable of reinforcing a column-beam joint between a steel frame column and a steel frame beam having a closed cross-section material such as a rectangular steel pipe or a circular steel pipe without cutting the column. Inside the beam joint of the column, a plurality of diaphragms made of steel bars such as round steel and different diameter reinforcing bars are provided at the positions of the upper and lower flanges of the steel beam. Both ends of the diaphragm are attached to the side faces of the beam joint of the steel column. The above object is achieved by a structure in which it is inserted into a mounting hole formed in the portion and welded and fixed to the mounting hole.

〔Example〕

 Hereinafter, the present invention will be described with reference to an illustrated embodiment.

Steel beams 2, 2 and 3, 3 made of H-shaped steel are joined to the side surface of a steel column 1 made of a rectangular steel pipe.

In addition, inside the beam joint portion of the steel frame column 1, round steel or different diameter reinforcing bars, etc. are formed corresponding to the positions of the upper and lower flanges 2a, 2a and 3a, 3a of the left and right steel frame beams 2, 2 and the front and rear steel frame beams 3, 3. A plurality of diaphragms 4 and 4 made of steel bars are horizontally mounted.

Insert both left and right ends of the diaphragms 4 and 4 into the mounting holes 5 and 5 horizontally formed in the side surface of the beam joint of the steel column 1 and weld them to the peripheral portions of the mounting holes 5 and 5. Is integrally attached to the beam joint.

The diameter, the number, and the arrangement pitch of the diaphragms 4 are determined in consideration of the diameters of columns and beams to be joined.

Also, the mounting hole 5 is drilled from the outside of the pillar, but by using a drill slightly thicker than the diameter of the diaphragm 4, the mounting hole 5 is drilled and groove processing is performed at the same time.
The processing should be omitted (see FIG. 3).

Further, as a method of arranging the diaphragm 4, it is not always necessary to arrange the diaphragms 4 in a straight line between the steel beams 2, 2 or 3, 3 that face each other, but in an arc shape or in a slanting manner between the adjacent steel beams 2, 3. In some cases (see FIGS. 4 and 5).

The ends of the steel beams 2 and 3 are welded to the outside of the beam joint portion of the steel frame column 1 reinforced in this way so as to be integrally joined.

In this case, the ends of the upper and lower flanges 2a and 3a of the steel beams 2 and 3 are welded and fixed to both the outer surface of the steel column 1 and the ends of the diaphragms 4 and 4 so that a smooth stress at the column-beam joint is obtained. Shall be communicated.

Further, the inside of the steel frame pillar 1 is filled with concrete 6 over its entire length, so that the rigidity of the steel frame pillar 1 is enhanced.

In this case, since the diaphragms 4, 4 are made of round steel or different diameter reinforcing bars, it is possible to secure a sufficient gap inside the beam joint of the steel column 1, and the concrete 6 at the beam joint. Can be densely packed.

It should be noted that in the embodiment, the case where the rectangular steel pipe is used as the steel frame column 1 has been described, but even in the case of the steel frame column made of other closed type cross-section materials such as a circular steel pipe and a polygonal steel pipe, the structure of the beam joint portion Are exactly the same.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

As the diaphragm, round steel or steel bar made of different diameter reinforcing bars is used, and the diaphragm is inserted at both left and right ends into the mounting holes that are horizontally drilled at the side of the beam joint of the steel frame column and It is attached by welding and fixing it in the hole.

Therefore, compared to the conventional reinforcing method using a plate, the troublesome processing such as cutting and rejoining the steel column is not necessary at all, and the processing is easy.

The diaphragm mounting hole is drilled from the outside of the pillar, but by using a drill slightly thicker than the diameter of the diaphragm, groove machining is performed at the same time as the mounting hole is drilled, which saves labor. .

Further, since a sufficient gap can be provided inside the beam joint portion of the steel frame column, the rigidity of the beam joint portion can be remarkably enhanced by densely filling this portion with concrete.

Further, since the steel beam can be directly welded and fixed to both the side surface of the beam joint of the steel column and the diaphragm, stress continuity between the columns and the beams and between the beams can be achieved, and therefore the stress in the beam joint can be reduced. The transmission can be smooth.

[Brief description of drawings]

FIGS. 1, 2 and 3 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a column-beam joint, FIG. 2 is a transverse sectional view thereof, and FIG. FIG. 4 is a partial vertical cross-sectional view thereof, and FIGS. 4 and 5 are horizontal cross-sectional views of a column-beam joint portion showing another embodiment of the present invention. 1 ... Steel column, 2, 3 ... Steel beam, 4 ... Diaphragm, 5 ... Mounting hole, 6 ... Concrete.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akio Tomita 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Kansuke Honma 1-2-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 within Kashima Construction Co., Ltd. (56) References JP-A-62-141235 (JP, A)

Claims (2)

[Claims] 1. A column-beam joint structure at a column-beam joint between a steel frame column and a steel beam having a closed cross-section member, wherein upper and lower flanges of the steel beam are inside the beam joint of the steel column. A plurality of steel bar diaphragms are inserted into the mounting holes drilled in the side surfaces of the beam joints of the steel columns and welded and fixed to the mounting holes. Column / beam joint structure characterized by the presence. 2. The column according to claim 1, wherein the diaphragm is made of round steel or rebar having a different diameter.
Beam joint structure.