JPH0321735A - Junction structure for pillar and beam - Google Patents

Abstract

PURPOSE:To facilitate the construction of the title structure by welding each joining plate to pillar in the diagonal direction of the pillar so as to be laid between slits on its side surfaces adjacent to each other, and joining a bracket or a steel framed beam to each joining plate. CONSTITUTION:Oblong slits 2a are formed at the upper and lower flange positions of a steel beam in the side surface of a pillar 2. Then, each joining plate 3 is provided in the diagonal direction of the pillar 2 horizontally so as to be laid between the slits 2a on its surfaces adjacent to each other so that it is welded to the pillar 2 at the position of each slit 2a. Furthermore, a bracket or a steel beam 1 is welded and joined pillar to the 2 via the joining plate 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a column-beam joint structure in which a square steel pipe column and a steel beam are joined via a joint plate disposed inside the column.

[Problem to be solved by the invention]

A diaphragm must be placed at the joint between the square steel pipe and the rib beam to transmit stress, but due to the way it is inserted, the conventional structure is a column that is cut at the upper and lower flanges of the beam that passes through the joint. The through diaphragm method connects to the end face of the beam, the inner diaphragm method inserts the upper and lower flanges of the beam inside the column that has been cut at the beam's web, and the outer diaphragm method connects the column to its outer periphery without cutting it. Separated.

However, in the former two methods, the cut pillars must be welded after joining in order to join the diaphragm, which takes time and effort, and makes it difficult to ensure the accuracy of the pillars.In the latter method, the diaphragm requires a large amount of welding. The reality is that both of them have drawbacks in terms of construction, such as their processing being troublesome.

Furthermore, in conventional joints using diaphragms, the out-of-plane bending rigidity of the column to which the beam web is attached is low, making it difficult to sufficiently transmit the bending moment of the beam in that portion.

This invention was made based on the actual situation of conventional structures, and aims to propose a new structure that eliminates the need for cutting columns, requires less welding, and can sufficiently transmit the bending moment of beams. be.

[Means to solve the problem]

In the present invention, horizontally long slints are formed on the side of the column at the upper and lower flanges of the steel beam, a joint plate for stress transmission is placed inside the column through this slit, and a bracket or steel beam is welded to this joint plate. Bolt jointing eliminates the need to cut the pillars and reduces the amount of welding required for joining after cutting.

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

If the end face of the joint plate is located in the slit, the bracket or the flange of the steel beam will be welded to this end face.

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

In addition, the shape of the slit is formed into a T-shape along the cross section of the beam,
By attaching ribs to the joint plate that bear the vertical component, it is possible to transmit the bending moment from the steel beam web to the column.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment.

As shown in FIG. 1, this invention connects a bracket or steel beam to a square steel pipe column 2, which has slits 2a formed at the upper and lower flange positions of a steel beam 1 on the side, through a joint plate 3 disposed inside the column. The beam 1 is joined together. The slit 2a is opened according to the position of the pillar 2. As shown in FIG. 2, in the case of a central pillar, they are provided on four sides of the pillar 2, and as shown in FIG. 7, in the case of a corner pillar, they are provided on two sides.

If Surin} 2a is opened horizontally, the joining plate 3
are the adjacent slits 2'a, 2a of the pillar 2 as shown in the figure.
The slit 2 is installed horizontally in between, spanning the diagonal direction of the pillar 2.
It is received by the pillar 2 at the a and 2a positions.

First, the invention recited in claim 3 will be explained.

This invention is shown in Figure 2-1. As shown in III, the column 2 and the steel beam 1 are joined by welding using a joining plate 3 that is shaped to fit inside the column 2.

(2) is a case where the planar shape inside the column 2 of the joining plate 3 is bent into a rectangular shape, and (2) is a case where it is curved.

In the embodiment, two joining plates 3.3 are attached to the slit 2a.
This shows the case where the ends of the joint plate 3 come together, but the thickness of the inside of the column 2 of this joining plate 3 is so large that it also serves as a backing during welding.
As shown in , it is made larger than that at the slit 2a position.

As shown in FIG. 3, the bracket or flange of the steel beam 1 is butted against the end faces of the two joining plates 3.3 of the l-slit and welded thereto.

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

In this invention, as shown in FIG. 4-I, (■), a protrusion 3a that protrudes from the slit 2a toward the steel beam 1 side is continuously formed on one side of the joint plate 3 in the third claimed invention, and this protrusion The steel beam 1 on the part 3a side is connected to the column 2 with bolts.

The protrusion 3a is provided with a bolt hole 3b for bolt connection to the flange of the steel beam 1, and the slit 2a is welded around the slit 2a as shown in H in the same way as in the third claim of the invention. Joined.

The fit of the other end surface of the joining plate 3 is exactly the same as in the third aspect of the invention, as shown in (3).

In the third and fourth aspects of the invention, when the pillar 2 is a side pillar or a corner pillar, the joint part is constructed by applying the general part shown in the drawings.

Next, the invention as claimed in claim 5 will be explained.

In this invention, as shown in FIGS. 5-1 and 5-II, the protrusions 3a according to the fourth aspect of the invention are formed on both sides of the joint plate 3, and the entire steel beam 1 is joined with bolts.

In this invention, as shown in Fig. 6, the welding part of the joint is only around the slit 2a of the joint plate 3, but the web of the steel beam 1 is welded between the upper and lower joint plates 3 and 3 in order to transmit shear force. Flate 4 is accepted.

Adjacent joining plates 3.3 protruding from the same slit 2a are welded and integrated to the steel beam 1 as shown in FIG. 5-H.

FIGS. 8 and 7 show examples in which the pillars 2 are side pillars and corner pillars, respectively.

In both cases, the structure is arranged according to the joint part in the case of the middle pillar, but the embodiment shown in Fig. 8 has two joint plates 3 in one slit 2a.
, 3, and the embodiment shown in FIG. 7 shows a case where one joining plate 3 is arranged. In the case of a side column, one joint plate 3 is disposed so as to pass through the column 2 in a straight line, as shown in FIG.

FIG. 9 shows an embodiment of the invention described in claim 6,
In this invention, the slit 2a is formed in a T-shape, and a lip 3 is formed on the joint side of the joint plates 3, 3, that is, on the web side of the steel beam l.
C is protruded and formed into an L-shaped cross section, and the steel beam l
The structure is such that the bending moment from the web can be transmitted to the column 2.

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

〔Effect of the invention〕

This invention is as described above, and a joint plate is arranged horizontally between the slits provided on the side of a column and welded thereto, and a steel beam is connected to this joint plate by welding or bolts. There is no need to cut the parts, which eliminates the trouble of welding and the difficulty of ensuring precision, making construction easier.

Furthermore, in the invention as claimed in claim 6, the slit is formed in a shape that follows the web of the steel beam, and the connecting plate is arranged in such a manner that it can bear the vertical component, so that the bending moment from the steel beam is transmitted to the column. be able to.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the shape and condition of the slit in the column, Fig. 2-1, I is a plan view showing the arrangement of the joint plate of the third claimed invention, and ■ is a partial sectional view of the slit. ,
FIG. 3 is a perspective view of FIG. 2-I, FIGS. 4-I and IV are plan views showing the arrangement of the joining plate of the fourth claim of the invention, ■ and ■ are partial cross-sectional views of the slits thereof, and FIG. Figure-1, [1
is a plan view illustrating the arrangement of the joint plate of the fifth claim; 4 is a cross-sectional view of its protrusion; FIG. 6-I is a perspective view of FIG. Figure 7-
1. II and FIG. 8 are plan views showing embodiments of joints in the corner pillars and side pillars, respectively, FIG. 9 shows an embodiment of the sixth claimed invention, I is a perspective view, n, m is a plan view. 1... Steel beam, 2... Column, 2a...
...Slit, 3...Joining plate, 3a...Protrusion, b...Bolt hole, C...Rib, 4... ·plate. Figure - ■ Fableko Figure 2 Figure 5 Figure ■ ■ 3.) Ichito = here Figure 7 Figure - E Figure 8

Claims (6)

[Claims] (1) A joint structure between a steel beam and a square steel pipe column with slits formed at the upper and lower flanges of the steel beam on the side, and a joint plate is placed between each adjacent slit in the diagonal direction of the column. This joint plate is welded to the column at the slit position, and a bracket or steel beam flange is connected to the joint plate to form a column-beam joint structure. (2) The column-beam joint structure according to claim 1, wherein the slit is horizontally long and the joint plate is arranged horizontally. (3) The column-beam joint structure according to claim 2, wherein the bracket or the flange of the steel beam is welded to the end face of the joint plate at the slit position. (4) On one side of the joint plate, there is a continuous protrusion with bolt holes that protrudes from the slit in the column toward the steel frame side, and the bracket or steel beam on this protrusion side is connected to the joint plate. The column-beam joint structure according to claim 2, wherein the pillar-beam joint structure is bolted to the protrusion. (5) On both sides of the joint plate, there are continuous protrusions with bolt holes that protrude from the slits in the columns toward the steel frame side, and the brackets or steel beams are bolted to the protrusions of the joint plate. The column-beam joint structure according to claim 2, characterized in that: (6) The column-beam joint structure according to claim 1, wherein the slit is T-shaped and the joint plate inserted into the slit has an L-shaped cross section with ribs.