JPH09209449A - Beam-column joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To embody how to simplify dramatically the manufacture of structural steel and machining work and how to shorten a construction period dramatically by penetrating a square steel pipe post into a joint steel plate by way of a through hole and driving a wedge so as to fix the joint steel plate and joining upper and lower flanges on the end of a structural steel beam with the joint steel plates which are vertically placed side by side. SOLUTION: A square steel pipe post 5 is penetrated through a joint steel plate 6a by way of a through hole 7. Then, a wedge 9 is driven in the clearance between the through hole 7 and the square steel pipe post 5, thereby fixing the steel plate 6a in the form of a collar. A steel beam 2 is loaded on the steel plate 6a. Furthermore, the joint steel plate 6a is penetrated into the square steel pipe post 5 by way of the through hole 7 and fixed therewith by driving a wedge 9 into the clearance between the through hole 7 of a steel plate 6b and the pipe post 5. The steel beam 2 is sandwiched with the upper and lower steel plates 6a and 6b fixed with the wedge 9, thereby fastening flanges 2a and 2b of the beam 2 with high strength bolts. This construction makes it possible to eliminate the need for handling when conveying or welding post structural steel and expect marked cost reduction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column / beam joint structure and a joint construction method for a square steel pipe (concrete) column and a steel frame beam made of H-shaped steel or the like.

[0002]

2. Description of the Related Art Conventional beam-column joints of steel pipe columns are often provided with a diaphragm for reinforcement.
As shown in FIGS. 14 and 15, there are an inner diaphragm type in which the diaphragm 3 is provided inside the steel tube column 1 and an outer diaphragm type in which the diaphragm 3 is provided outside the steel tube column 1 as shown in FIGS. In the figure, 2 is a steel beam, and 4 is a web.

The inner diaphragm type is mainly used when the steel pipe column 1 is a square steel pipe column, and the outer diaphragm type is mainly used when the steel pipe column 1 is a round steel pipe column.

In any of the forms, the diaphragm 3 and the web 4 and the steel pipe column 1 are welded and joined to each other, so that they were welded and joined to the construction site by a steel frame processor.

[0005]

As described above, since the main assembly is factory welding, it is unavoidable to carry, process, and weld a large column steel pipe with a diaphragm attached. It is a big factor to increase.

Since the column-beam joint is structurally the heaviest part, a great deal of labor is required for quality control of welding of the column-beam joint.

The object of the present invention is to eliminate the disadvantages of the above-mentioned conventional example and to eliminate the need for welding to install the outer diaphragm, which eliminates the need for manufacturing / welding the column / beam joints in a steel frame factory, thus providing a large column steel frame. No steel handling during welding or welding work. An object of the present invention is to provide a joint structure between a square steel pipe column and a steel beam, which can realize a significant simplification of the processing work and a drastic reduction in the manufacturing period, and can expect a large cost reduction.

[0008]

In order to achieve the above object, the present invention provides a joining structure between a square steel tubular column and a steel frame beam, in which two joining steel plates having through holes are connected to each other through the through holes. To penetrate the steel pipe pillar, fix the joining steel plate by punching a wedge in the gap between the joining steel plate and the square steel pipe pillar in this through hole, and join the upper and lower flanges of the steel beam ends to the joining steel plates arranged vertically Is the gist.

Further, as a method of joining the square steel pipe column and the steel frame beam, the square steel pipe column is penetrated through the joining steel plate, and a gap between the joining steel plate and the square steel pipe column is formed in the through hole. Fix the lower joining steel plate in a brim state by striking a wedge on it, place the steel beam end on this lower joining steel plate, and similarly attach the square steel pipe column through the through hole to the joining steel plate. The steel plate for joining is pierced through, and a wedge is punched in the gap between the steel plate for joining and the square steel pipe column in this through hole to fix the upper joining steel plate in a brim state. The main idea is to sandwich and join them.

According to the first aspect of the present invention, by using the outer diaphragm type for the square column steel pipe, the joining steel plate and the square steel pipe column can be easily fixed by the wedge at the construction site. The production / welding work of the column / beam joints at the steel frame factory is not required, and the production / processing of the steel frame is concentrated only on the production / processing of the steel plate for joining. Furthermore, the pillar steel pipe is unprocessed, and handling during transportation and welding work is eliminated.

According to the second aspect of the present invention, in addition to the above action, the steel beam can be temporarily placed on the lower joining steel plate, and the lifting work by a crane or the like can be shortened and safely performed. It can be carried out.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a joint structure of a square steel tubular column and a steel frame beam of the present invention.
Is a square steel pipe (concrete) column, 6a and 6b are steel plates for joining,
2 is a steel beam.

A rectangular through hole 7 through which the square steel pipe column 5 passes is formed in the center of the joining steel plates 6a and 6b. Further, in this embodiment, the upper frame 2a and the lower flange 2b of the steel beam 2 are bolted together. Bolt holes 8 for are arranged side by side from the peripheral portion toward the center. In the figure, 9 is a wedge.

As shown in FIGS. 2 to 4, first, the square steel pipe column 5 is inserted through the through hole 7 into the joining steel plate 6a located on the lower side.
And the wedge 9 is struck from the lower side into the gap between the through hole 7 of the joining steel plate 6a and the square steel pipe column 5 to fix the joining steel plate 6a to the square steel pipe column 5 in a brim state.

Then, the end of the steel beam 2 is placed on the lower joining steel plate 6a. In this way, the steel beam 2
Can be temporarily placed on the joining steel plate 6a.

A steel plate 6b for joining, which is located further on the upper side, is passed through the square steel pipe pillar 5 through a through hole 7 provided therein,
A wedge 9 is struck from the lower side in the gap between the through hole 7 of the joining steel plate 6b and the square steel pipe column 5 to fix the joining steel plate 6b to the square steel pipe column 5 in a brim state. With this configuration, the ends of the steel beam 2 are sandwiched by the upper and lower joining steel plates 6a and 6b fixed by the wedges 9, and the upper flange 2a and the lower flange 2b of the steel beam 2 are fastened with high-strength bolts.

As described above, the upper and lower joining steel plates 6a, 6b
As shown in FIG. 5, transmission of the long-term load a due to the self-weight of the building when fixed with wedges 9 inserted from below is as shown in FIG.
A force that pushes down the periphery of a and 6b from both sides is transmitted, and as shown in FIG. 6, the lower side of the gap between the through hole 7 and the square steel pipe column 5 is narrowed, and as a result, the caulking at the wedge 9 is made more Because it is stronger, you can maintain a more stable condition.

Further, although FIG. 7 shows a load at the time of an earthquake which is a short-term load, it is transmitted as a compressive force b from the joining steel plates 6a and 6b to the square steel pipe column 5. Since the stress at the time of the earthquake is transmitted by the bearing force (compressive force) in this manner, it is guaranteed that fatal joint breakage such as weld breakage, which is a problem in conventional welded joints, does not occur.

As still another embodiment, when the square steel pipe column 5 is likely to be deformed by bearing stress, the bearing reinforcing plate 10 is joined to the through hole 7 as shown in FIG. 6a,
It may be inserted so as to overlap the square steel pipe column 5 in the gap between the 6b and the square steel pipe column 5. In this case, the wedge 9 for fixing the upper joining steel plate 6b may be inserted from above.

The joining steel plates 6a and 6b and the steel beam 2 may be joined by welding as well as by bolt joining as described above. Further, the shapes of the joining steel plates 6a and 6b are not necessarily uniform, and as shown in FIG. 9, when the joining cores of the beam steel frame are different on both sides or are eccentric, the shapes can be adjusted according to the amount of eccentricity. .

Also, when the steel beam 2 is joined in three directions or two directions, basically a standard shape may be used as shown in FIGS. 10 and 12, but if necessary, as shown in FIG. It is also possible to perform bending work or welding assembly work into a shape as shown in FIG.

[0022]

As described above, according to the joining structure and joining method of the square steel pipe column and the steel beam of the present invention, welding is not required for the installation of the outer diaphragm. Manufacturing / welding work is no longer required, and handling of large pillar steel frames and welding work is eliminated, and steel frames are manufactured.
It is possible to greatly simplify the processing work and significantly shorten the manufacturing period, and expect significant cost reductions.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a joining structure and a joining construction method for a square steel tubular column and a steel frame beam of the present invention.

FIG. 2 is a perspective view showing a joining structure between a square steel tubular column and a steel frame beam of the present invention and fixing of a joining steel plate in a joining method.

FIG. 3 is a side view showing a first half step of the method for joining a square steel tube column and a steel beam of the present invention.

FIG. 4 is a plan view showing a first half step of the method for joining a square steel tube column and a steel beam of the present invention.

FIG. 5 is an explanatory view showing a method of transmitting a long-term load in a joint structure of a square steel pipe column and a steel frame beam of the present invention.

FIG. 6 is an explanatory diagram of a main part showing a method of transmitting a long-term load in a joint structure of a square steel tube column and a steel beam of the present invention.

FIG. 7 is an explanatory view showing a short-term load transmission method in the joint structure of the square steel tubular column and the steel beam of the present invention.

FIG. 8 is a side view showing a method of reinforcing a column steel pipe in a joint structure of a square steel pipe column and a steel beam of the present invention.

FIG. 9 is a plan view showing a joint structure of a square steel pipe column and a steel frame beam of the present invention and a beam in the jointing method when the beam is eccentrically attached to the column.

FIG. 10 is an explanatory diagram of a standard type in the case where a square steel tube column of the present invention is joined to a steel frame beam and the beam is attached in only three directions in the joining method.

FIG. 11 is an explanatory view of a joint type structure of a square steel tubular column and a steel frame beam of the present invention and a deformation type when the beam is attached in only three directions in the joining method.

FIG. 12 is an explanatory view of a standard type in the case where the beam is attached only in two directions in the joining structure of the square steel tubular column and the steel beam of the present invention and the joining method.

FIG. 13 is an explanatory view of a joint structure of a square steel tubular column and a steel beam of the present invention and a deformation type in the case where the beam is attached only in two directions in the joining method.

FIG. 14 is a plan view of an inner diaphragm type in a conventional example.

FIG. 15 is a side view of an inner diaphragm type in a conventional example.

FIG. 16 is a plan view of an outer diaphragm type in a conventional example.

FIG. 17 is a side view of an outer diaphragm type in a conventional example.

[Explanation of symbols]

1 ... Steel tube column 2 ... Steel beam 2a ... Upper flange 2b ... Lower flange 3 ... Diaphragm 4 ... Web 5 ... Square steel tube column 6a, 6b ... Steel for joining 7 ... Through hole 8 ... Bolt hole 9 ... Wedge 10 ... Support pressure reinforcement Board

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shozo Maeda 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd.

Claims (2)

[Claims] 1. A steel plate for joining having a through hole is made to penetrate a square steel pipe column through the through hole, and a wedge is joined to the gap between the steel plate for joining and the square steel pipe column at the through hole to join them. A joint structure between a square steel pipe column and a steel beam, in which the steel plates are fixed and the upper and lower flanges at the ends of the steel beam are joined to the joining steel plates arranged vertically. 2. A steel plate for joining is made to penetrate a square steel pipe column through said through hole, and a wedge is punched in the gap between the steel plate for joining and the square steel pipe column at this through hole to form the lower steel plate for joining. Fixed in the state,
The steel beam end is placed on this lower steel plate for joining, the square steel pipe column is similarly penetrated through the steel plate for joining through the through hole, and the gap between the steel plate for joining and the square steel pipe column in this through hole. Welding a steel plate for welding on the upper side to fix it in a brim state, and joining the steel beam ends by sandwiching the steel beam ends from above and below with the steel plates for welding arranged vertically in this way. Construction method.