JPH0781311B2 - Column-beam joint structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a column-beam joint structure in which a rectangular steel pipe column and a steel frame beam are joined together via a joining plate arranged inside the column.

[Problems to be Solved by the Invention]

For the transmission of stress at the joint between the rectangular steel pipe and the steel beam, it is necessary to dispose the diaphragm.However, due to the way it is inserted, the conventional structure is such that the columns cut at the upper and lower flange positions of the beam penetrating the joint. It is roughly divided into a through-diaphragm method that joins to the end face, an inner diaphragm method that inserts into the upper and lower flange positions of the beam inside the pillar cut at the beam web position, and an outer diaphragm method that joins the outer circumference without cutting the pillar. To be done.

By the way, in the former two cases, the pillars that have been cut to join the diaphragms must be welded after joining, which requires time and labor for the construction, and it becomes difficult to secure the accuracy of the columns.In the latter case, the welding amount of the diaphragm is large. In addition, the fact is that the processing is troublesome and both have weak points in construction.

Further, in the conventional joining using a diaphragm, it is difficult to sufficiently transmit the bending moment of the beam at that portion because the out-of-plane bending rigidity of the column to which the beam web is attached is small.

The present invention has been made in view of the actual situation of such a conventional structure, and intends to newly propose a structure that does not require cutting of columns, has a small amount of welding, and can sufficiently transmit the bending moment of the beam. is there.

[Means for Solving the Problems]

According to the present invention, lateral slits are formed at the upper and lower flange positions of the steel beam on the side surface of the column, and a joint plate for stress transmission is inserted into the column through the slit to extend between adjacent slits. Weld the flange of the steel beam to the
Alternatively, it is possible to eliminate the need for cutting the pillar by bolting, and to reduce the amount of welding accompanying the joining after cutting when cutting.

When the slits are formed to be horizontally long, the joining plate is horizontally provided between adjacent slits in a diagonal direction of the cross section of the column, and welded to the column at the slit position to be integrated.

If the end face of the joining plate is located in the slit, the flange of the steel beam is welded to this end face.

When a protrusion having a bolt hole is formed on one side or both sides of the joint plate and protrudes outward from the slit, the flange of the steel frame beam is bolted to this protrusion.

In addition, the shape of the slit is formed in a T shape along the beam cross section,
Bending moments from the steel beam web can be transmitted to the columns by attaching ribs that bear the vertical component to the joint plates.

〔Example〕

 The present invention will be described below with reference to the drawings illustrating an embodiment.

The present invention, as shown in FIG. 1, is a prismatic steel pipe column 2 having slits 2a formed at the upper and lower flange positions of the steel beam 1 on the side surface.
Further, the steel beam 1 is joined via the joining plate 3 arranged inside. The steel beam 1 includes a bracket which is a part of the steel beam 1 and which is located at an end portion between the columns 2 on which the steel beam 1 is installed and which is conveniently divided and is joined to the column 2 in advance. . The slit 2a is opened depending on the position of the pillar 2. As shown in FIG. 2, in the case of the middle pillar, it is provided on the four side surfaces of the pillar 2, and in the case of the corner pillar as shown in FIG. 7, it is provided on the two side surfaces.

The joining plate 3 is inserted from the outside of the pillar 2 into the inside of the pillar 2 through the slit 2a, and is provided so as to straddle between the adjacent slits 2a and 2a.

When the slits 2a are opened horizontally, the joining plate 3 is horizontally installed between the adjacent slits 2a, 2a of the pillar 2 as shown in the drawing, and is straddled in the diagonal direction of the pillar 2, and the pillars are positioned at the slits 2a, 2a. Welded to 2.

First, the invention described in the third claim will be described.

In the present invention, as shown in FIGS. 2I and III, the column 2 and the steel beam 1 are joined by welding by using a joining plate 3 having a shape that fits inside the column 2.

I is the case where the planar shape inside the column 2 of the joining plate 3 is bent into a square shape, and III is the case where it is formed by bending.

In the embodiment, the case where the ends of the two joining plates 3 and 3 gather in one slit 2a is shown.
The thickness of the inside of the pillar 2 is made larger than that at the position of the slit 2a as indicated by II so as to also serve as a backing during welding.

As shown in FIG. 3, the flange of the steel beam 1 is butted against the end faces of the two joining plates 3, 3 having one slit, and is welded thereto.

Next, the invention described in claim 4 will be described.

As shown in FIGS. 4 -I and IV, the present invention continuously forms a protruding portion 3a protruding from the slit 2a to the steel beam 1 side on one side of the joint plate 3 in the third aspect of the invention, and this protruding portion is formed.
The steel beam 1 on the 3a side is joined to the column 2 by bolts.

The protrusion 3a is provided with a bolt hole 3b for connecting a bolt to the flange of the steel beam 1, and the pillar 2 is provided with the bolt hole 3b as in the third aspect of the invention.
As shown in II, they are joined by welding the slit 2a around.

The accommodation of the other end surface of the joining plate 3 is exactly the same as that of the third aspect of the invention as shown in III.

In the above third and fourth inventions, the joint portion when the pillar 2 is a side pillar or a corner pillar is configured by applying that of the illustrated general portion.

Next, the invention described in claim 5 will be described.

In this invention, as shown in FIGS. 5A and 5B, the projecting portions 3a in the fourth invention are formed on both sides of the joint plate 3, and the all-steel beam 1 is joined by bolts.

In the present invention, as shown in FIG. 6, the welded portion of the joint is only around the slit 2a of the joint plate 3, but the web of the steel beam 1 is joined between the upper and lower joint plates 3 and 3 to transmit the shearing force. The plate 4 to be welded is welded.

Adjacent joining plates 3, which protrude from the same slit 2a,
3 is welded as shown in FIG. 5 -II, integrated and joined to the steel beam 1.

FIG. 8 and FIG. 7 show examples in which the pillar 2 is a side pillar or a corner pillar, respectively.

Both are constructed according to the joint portion in the case of the center pillar, but the embodiment of FIG. 8 has two joint plates 3 and 3 in one slit 2a.
The embodiment of FIG. 7 shows the case where one bonding plate 3 is arranged.

In the case of a side pillar, as shown in FIG. 8, the one joining plate 3 is arranged so as to penetrate the pillar 2 linearly.

FIG. 9 shows an embodiment of the invention described in claim 6,
In this invention, the slit 2a is opened in a T shape, and the joining plate 3,
A rib 3c is provided on the assembly side of 3, ie, on the web side of the steel beam 1 to form an L-shaped cross section, and a bending moment from the web of the steel beam 1 can be transmitted to the column 2. It is a thing.

In this case, the bending stress can be evenly distributed in the joint plate 3.

〔The invention's effect〕

This invention is as described above, between the slits provided on the side surface of the pillar, while horizontally inserting the joining plate into the inside of the pillar through the slit, and welding both ends of the joining plate around the slit, Since the steel beam is welded to the joining plate or joined by bolts, it is not necessary to cut the column, and the labor and accuracy of welding that accompanies it is eliminated, and the construction is facilitated.

Further, in the sixth aspect of the present invention, since the slit is formed in a shape along the web of the steel frame beam and the joint plate is arranged so as to be able to bear the vertical component, the bending moment from the steel beam is transmitted to the column. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state of forming a slit in a column, FIGS. 2 -I and III are plan views showing an arrangement state of a joining plate according to the third aspect of the invention, and II is a partial sectional view of the slit. Third
Fig. 2 is a perspective view of Fig. 2 -I, Fig. 4 -I, IV are plan views showing the arrangement state of the joining plate of the fourth aspect of the invention, II, III are sectional views of slits thereof, Fig. 5- I and III are plan views showing the arrangement state of the joint plate according to the fifth aspect of the invention, II is a sectional view of the projecting portion thereof, and FIG. 6-I is a perspective view of FIG.
I is a partial sectional view of the slit, FIGS. 7-I, II, and FIG. 8 are plan views showing an embodiment of a joint portion in a corner pillar and a side pillar, respectively, and FIG. 9 is an embodiment of the sixth invention. I is a perspective view, and II and III are plan views. 1 ... Steel beam, 2 ... Pillar, 2a ... Slit, 3 ... Joining plate, 3a ... Projection, 3b ... Bolt hole, 3c ... Rib, 4 ... Plate.

Front Page Continuation (72) Inventor Akio Tomita 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (56) References Japanese Patent Publication Sho 50-21424 (JP, B2)

Claims (6)

[Claims] 1. A structure of a joint between a column of a rectangular steel pipe in which slits are formed at the upper and lower flange positions of the steel beam on the side surface and the steel beam, and is inserted into the column through slits between adjacent slits. A pillar-beam joint structure in which possible joint plates are provided in a diagonal direction of the pillar, the joint plate is welded to the pillar at the slit position, and the flange of the steel frame beam is joined to the joint plate. 2. The column-beam joint structure according to claim 1, wherein the slits are opened horizontally and the joint plates are arranged horizontally. 3. The column-beam joint structure according to claim 2, wherein the flange of the steel beam is welded to the end surface of the joint plate at the slit position. 4. A protrusion having a bolt hole is continuously formed on one side of the joint plate so as to protrude from the column slit to the steel beam side. The steel beam on the protrusion side protrudes from the joint plate. The column-beam joint structure according to claim 2, wherein the column is bolt-joined. 5. The joint plate is formed on both sides thereof with protrusions having bolt holes which protrude from the pillar slits toward the steel frame beam continuously. The steel frame is bolted to the protrusions of the joint plate. The column-beam joint structure according to claim 2, wherein 6. The column-beam joint structure according to claim 1, wherein the slit is formed in a T shape, and the joint plate inserted therein has an L-shaped cross section with ribs. .