JP2501515B2 - Steel pipe column connection structure - Google Patents

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 steel pipe columns.

[0002]

2. Description of the Related Art A conventional steel pipe column joint structure is generally shown in FIG. That is, the steel pipe of the connection part which is cut and separated in the middle of the steel pipe is welded to the steel pipes 2 and 2 again after the diaphragms 3 and 3 having larger diameters are welded vertically. Further, in the connection portion steel pipe 1, connection members 4 and 4 corresponding to beam ends are formed by cutting off the end portions of the flanges 4a and 4a by the amount of protrusion of the diaphragms 3 and 3 and the diaphragms 3 and 3, respectively. The flanges 4a, 4a are welded together in a state of being butted. The connection members 4 and 4 are attached at a preliminary factory, the steel pipe column 5 is built in the site, and the beam 6 and the upper and lower flange joint plates 7 and 7 that are separately suspended at the site are installed. In addition, they are fastened and connected by bolts and nuts 9, ... Through the plate 8 for the web joint.

[0003]

However, the above-mentioned joint structure has the following problems. (1) Since flanges and webs are connected by bolts and nuts via joint plates, joint plates and bolts and nuts that are heavy must be used in large amounts in the middle of the beam. It has the drawback of not becoming. (2) Due to (1), a large number of bolt holes are inevitably required, which is a troublesome work. (3) Since the position of the suspended beam is not stable, the connecting work is extremely difficult. The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a joint for connecting a beam, which has a heavy weight in the middle of the beam and a troublesome drilling operation. plate,
It is an object of the present invention to provide a new joint structure for steel pipe concrete columns that can be achieved without requiring bolts and nuts, can stabilize the position of the suspension beam, and can facilitate connection.

[0004]

In order to achieve the above object, the joint structure according to the present invention has a structure in which the beam connection side of the diaphragm at the lower end of the steel pipe of the joint portion is joined to the steel plate by welding or by beam expansion by preforming. The end of the beam shall be fastened with bolts and nuts, and the upper end of the beam shall be fastened with bolts and nuts to an angle or special alloy L-shaped plate that is attached to the steel pipe of the joint by bolts. For the end web, bolts and nuts are fastened to the pre-finished steel pipe through a welded gusset plate, and the angle or special alloy L-shaped plate mounting bolts are not turned together and one end of the head of the internal bolt is cut out. At the same time, the mounting base end of the bent plate for preventing the bolt from slipping off to the inner surface of the steel pipe of the joint portion may be along the cutout surface.

The co-rotation treatment of the angle or the outer bolt for mounting the special alloy L-shaped plate may be performed by welding the inner nut to the inner surface of the steel pipe of the joint portion.

[0006]

[Operation] Since the connection of the beam is required to have the joint plate and the bolts and nuts only at the outermost end of the beam, the beam is halved as compared with the prior art. Further, since the lower surface of the suspended beam end is received by the diaphragm that can be received at the lower end of the steel pipe of the connection portion, the connection work is facilitated.

[0007]

EXAMPLES Examples will be described with reference to FIGS. In the present invention, the beam 6 connecting side of the diaphragm 3 at the lower end of the steel pipe 1 of the joint portion is welded to the steel plate 10 as shown in FIG. 2 or pre-expanded as shown in FIG.
The end can be received and the bolt and nut 11 can be fastened. On the other hand, on the upper side of the end of the beam 6, an angle or a special alloy L-shaped plate 12 that is attached to the steel pipe 1 for bolting is attached to the upper surface of the end 6 after receiving to fasten the bolt and nut 11. The ends of the beam 6 from above and below. The web at the end of the beam 6 is connected to the steel pipe 1 via a gusset plate 13 for pre-welding with bolts and nuts 11 fixed. Then, since the fastening can be done while the beam 6 is received, the work is facilitated.

The bolts 14 for attaching the plate 12 to the steel pipe 1 must be fastened together without rotating together.
In order to prevent the above-mentioned bolt 14 from rotating, as shown in FIG. 3, one end of the head of the internal bolt 14 is cut out 15 and the mounting base end 16a of the bent plate 16 for preventing the bolt from coming off is attached to the inner surface of the steel pipe 1. Align with the notch 15.

Alternatively, as shown in FIG. 1, the internal nut 17
May be preliminarily welded to the inner surface of the steel pipe 1.

[0010]

Since the present invention is configured as described above, it has the following effects. Joint plates and bolts required for connecting beam ends
The nut is halved, and the weight is greatly reduced, and the drilling work and the final tightening work are reduced. Since the temporary fixing of the suspension beam at the time of connection is secured, the work is greatly facilitated.

[Brief description of drawings]

FIG. 1 is a front view of a joint structure of the present invention.

FIG. 2 is a plan sectional view taken along the line II in FIG.

FIG. 3 is a plan sectional view of a lower flange taken along line III in FIG.

FIG. 4 is an explanatory view of a conventional joint structure.

[Explanation of symbols]

 1 Steel Pipe for Joint Port 2 Steel Pipe 3 Diaphragm 4 Joint Member 4a Flange 5 Steel Pipe Column 6 Beam 7 Plate for Joint 8 Plate for Joint 9 Bolt / Nut 10 Steel Plate 11 Bolt / Nut 12 Angle or Special Alloy L-shaped Plate 13 Gusset Plate 14 Bolts 15 Notches 16 Bending plates for preventing bolts from falling off 16a Mounting base end 17 Nuts

Claims (1)

(57) [Claims] 1. A steel pipe is added to the beam attachment side of the diaphragm at the lower end of the steel pipe of the joint portion, the beam end can be received by welding or pre-expansion forming, and the bolt nuts can be fastened. Bolts and nuts shall be fastened to an angle or special alloy L-shaped plate that is attached to the steel pipe at the mouth by bolts, and the beam end web is bolts and nuts through a gusset plate welded to the steel pipe at the pre-finished end. If you stop, the angle or special alloy L type plate
Co-rotate the attachment bolt with one end of the inner bolt head.
Bending play to prevent the bolt from falling out while notching
Of the base to the inner surface of the steel pipe of the joint
Joint structure of the steel pipe column, characterized by comprising a placed along.