JP2707207B2 - Joint structure between steel pipe column and beam - 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 between a steel pipe column and a steel beam in the fields of civil engineering, construction or bridges.

[0002]

2. Description of the Related Art In order to prevent a steel pipe column from being deformed by receiving an external force such as an out-of-plane bending stress through a beam at a joint portion of a connection between a steel column and a steel beam, which is a closed section column. ,
Conventionally, for example, a steel pipe column and a steel beam are joined with a diaphragm interposed therebetween.

FIG. 8 and FIG. 9 show a case where a through-diaphragm is used as an example. A steel pipe column 1 is cut at upper and lower portions at a joint portion with a beam 2, and the diaphragm 3 is passed through the cut steel pipe column 1. Then, the through diaphragm 3 is welded to the steel pipe column 1 and the upper flange 2a and the lower flange 2b of the beam 2.

FIGS. 10 and 11 show an example in which an outer diaphragm is used. The outer diaphragm 4 divided into four so as to surround the outer periphery of the steel pipe column 1 is divided into an outer peripheral surface of the steel pipe column 1, an upper flange 2 a of the beam 2 and a lower part. It is welded to the joint with the flange 2b.

[0005] By joining the steel pipe column 1 and the beam 2 via the through-diaphragm 3 and the outer diaphragm 4 as described above, external forces such as out-of-plane bending stress transmitted from the beam 2 to the steel pipe column 1 are applied to the through-diaphragm 3. , Which are absorbed by the outer diaphragm 4 to prevent deformation of the steel tube column 1.

However, in the case of using a through-diaphragm, the work of cutting and welding a steel pipe column on site is required. In the case of using an outer diaphragm, cutting is not necessary, but the outer peripheral surface of the steel pipe column is required. Then, it is necessary to weld the outer diaphragm to the beam flange position, and this welding is a hermetic type, which makes the work difficult, and in any case, it is troublesome and costly.

The connection of the connection between the steel pipe column 1 and the steel beam 2 is carried out by means of bolt connection except for welding. As an example, a T-shaped metal fitting 5 as shown in FIGS. 12 and 13 is used. Can be considered.

The upper flange 2a and the lower flange 2b of the beam 2
Is welded to the end of the vertical bar portion of the T-shaped metal joint 5 so that the horizontal bar portion comes into contact with the outer periphery of the steel pipe column 1. Then, the contacting horizontal bar portion is fastened to the steel pipe column 1 with a one-way high-strength bolt 6.

Conventionally, in the case of a high-strength bolt, it was necessary to reach both sides of the joining material. However, in the case of the one-way type high-strength bolt 6, the work can be performed from only one side. It is possible to easily cope with a situation where the inside of the pillar 1 cannot be reached.

[0010]

However, when the T-shaped metal joint 5 as described above is used, easiness of joining can be secured, but since the steel pipe column 1 does not have any reinforcement, FIGS.
As shown in Fig. 16, there is a possibility that rigidity and proof stress cannot be secured.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to easily and inexpensively join a steel pipe column and a beam by a bolt at a connection portion between the steel pipe column and the beam, and to form an out-of-plane bending through the beam through the beam. An object of the present invention is to provide a joint structure between a steel pipe column and a beam, which can reliably prevent deformation of the steel pipe column even when subjected to an external force such as stress.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a steel pipe column in which a T-shaped joint provided at a beam end is fastened to a side of the steel pipe column with a unidirectional high-strength bolt. In this connection structure, a horizontal flange-shaped reinforcing plate is protruded from a side portion of the steel pipe column, and the T-shaped metal joint has a slit for taking in the reinforcing plate.

[0013]

According to the present invention, since the T-shaped joint metal provided at the end of the beam is fixed to the steel pipe column with a bolt, the joint between the steel pipe column and the beam is tightened by the bolt via the T-shaped metal joint. It is performed only by fixing. Then, in a state where the T-shaped joint hardware is fixed to the steel pipe column, the reinforcing plate performs a reinforcing action like an outer diaphragm on the outer peripheral surface of the steel pipe column.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a side view showing a first embodiment of a joint structure between a steel pipe column and a beam according to the present invention, FIG. 2 is a plan view of the same, FIG.
It is a perspective view of a metal mold | die joining hardware.

The T-shaped metal fitting 7 will be described. As shown in FIG. 3, one of the L-shaped metal parts 7a and 7b, which is composed of a horizontal mounting piece 8 and a vertical mounting piece 9, is composed of a pair of upper and lower parts.
b is divided into two parts, and a bolt hole 10 is formed in each of the horizontal mounting pieces 8 and the vertical mounting pieces 9.

On the other hand, a horizontal flange-shaped reinforcing plate 11 is attached to a side portion of the steel pipe column 1 at a beam flange position in a factory by welding, and the reinforcing plate 11 is protruded. In this embodiment, four reinforcing plates 11 are provided one by one on each side of the steel tube column 1 which is a box column. However, as another embodiment, if the protrusion of the column corner is not a problem in design, As shown in FIG. 4, the reinforcing plate 11 may be turned around the outer periphery of the steel pipe column 1. By turning in this manner, the reinforcing effect of the reinforcing plate 11 can be enhanced.

Further, as in the case of a cold-formed steel pipe as shown in FIG. 5, a steel pipe column 1 having a radius at a corner thereof is manufactured by forming a reinforcing plate 11 corresponding to the radius as a divided body 11a and joining them together. It is also possible to weld to the steel pipe column 1 by welding.

In order to join the beam 2 to the steel pipe column 1 using the T-shaped joining metal member 7, a vertical mounting piece 9 of the lower L-shaped metal member 7a or 7b is provided at the joint position of the steel tube column 1 with the beam 2. Is fixed with a unidirectional high-strength bolt 6.

In this case, the steel pipe column 1 to which the upper flange 2a of the beam 2 is joined is provided with an L-shaped metal member 7b which is divided into two to avoid the web 2c of the beam 2, and the steel column 1 to which the lower flange 2b is joined. The L-shaped metal member 7a is attached.

Next, the end of the upper flange 2a of the beam 2 is placed on the upper end of the horizontal mounting piece 8 of the L-shaped metal member 7b, and the lower flange is mounted on the upper end of the horizontal mounting piece 8 of the L-shaped metal member 7a. Place the end of 2b.

At this time, in the T-shaped joint metal part 7, the L-shaped metal part 7
Since a slit 12 is formed between a and 7b corresponding to the thickness of the upper flange 2a and the lower flange 2b, the reinforcing plate 11 is taken in here.

The upper flange 2a and the lower flange 2b
And the L-shaped metal members 7a and 7b are each connected to a normal high-strength bolt 13
Then, the vertical mounting pieces 9 of the upper L-shaped metal members 7a and 7b are tightened and fixed to the steel pipe column 1 with one-way bolts 6.

In this state, as shown in FIG. 1, the T-shaped joint 7 and the upper flange 2a and the lower flange 2b of the beam 2 are continuously connected in the lateral direction by ordinary high-strength bolts 13. Reinforces the steel tube column 1 like an outer diaphragm and prevents the steel tube column 1 from being deformed by an external force transmitted from the beam 2.

FIG. 14 shows the case of the conventional outer diaphragm 4 type. In this case, the force P from the beam 2 of the welded portion acts directly, and a firm welding is required. In the case of the invention, since the force is transmitted from the surface (skin plate) of the steel pipe column 1 and the welded portion is bent rather than tensioned, the welding for attaching the reinforcing plate 11 can be performed by relatively simple welding such as fillet welding. It becomes possible.

When the thickness of the upper flange 2a or the lower flange 2b is different from the thickness of the reinforcing plate 11, the thickness may be adjusted by interposing a filler plate in the slit 12.

FIGS. 6 and 7 show a second embodiment of the present invention, in which the T-shaped metal joint 7 has a slit 12 but is of a forked type.

Also in this embodiment, a reinforcing plate is
11 is the same as in the first embodiment.

[0028]

As described above, the joint structure between the steel pipe column and the beam according to the present invention can be easily and inexpensively joined at the connection portion between the steel pipe column and the beam by bolts.
Even when the steel tube column receives an external force such as an out-of-plane bending stress via a beam, the deformation of the steel tube column can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a joint structure between a steel pipe column and a beam according to the present invention.

FIG. 2 is a plan view showing a first embodiment of a joint structure between a steel pipe column and a beam according to the present invention.

FIG. 3 is a perspective view showing an example of a T-shaped metal joint.

FIG. 4 is a plan view showing another example of a reinforcing plate.

FIG. 5 is a plan view showing still another example of the reinforcing plate.

FIG. 6 is a side view showing a second embodiment of the joint structure between a steel pipe column and a beam according to the present invention.

FIG. 7 is a plan view showing a second embodiment of the joint structure between a steel pipe column and a beam according to the present invention.

FIG. 8 is a plan view showing a conventional example of a joint structure between a steel pipe column and a beam.

FIG. 9 is a side view showing a conventional example of a joint structure between a steel pipe column and a beam.

FIG. 10 is a plan view showing another conventional example of a joint structure between a steel pipe column and a beam.

FIG. 11 is a side view showing another conventional example of a joint structure between a steel pipe column and a beam.

FIG. 12 is a side view showing a conventional example of using a metal joint having a joint structure between a steel pipe column and a beam.

FIG. 13 is a plan view showing a conventional example of using a metal joint having a joint structure between a steel pipe column and a beam.

FIG. 14 is an explanatory view showing force transmission in a conventional example.

FIG. 15 is an explanatory view showing a modification of a steel pipe column in a conventional example.

FIG. 16 is an explanatory view showing another modification of the steel pipe column in the conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Steel pipe column 2 ... Beam 2a ... Upper flange 2b ... Lower flange 2c ... Web 3 ... Street diaphragm 4 ... Outer diaphragm 5 ... T-shaped joining hardware 6 ... Unidirectional high-strength bolt 7 ... T-shaped joining metal 7a, 7b ... L-shaped hardware 8 ... Horizontal mounting piece 9 ... Vertical mounting piece 10 ... Bolt hole 11 ... Reinforcement plate 11a ... Split body 12 ... Slit 13 ... Normal high strength bolt

Claims (1)

(57) [Claims] 1. A joint structure between a steel pipe column and a beam, in which a T-shaped joint provided at an end of the beam is fastened with a unidirectional high-strength bolt to the side of the steel pipe column. A joint structure between a steel pipe column and a beam, wherein a flange-shaped reinforcing plate is protruded, and the T-shaped joint metal has a slit for taking in the reinforcing plate.