JPH0781312B2 - Column-beam joint structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a column-beam joint structure in which a joint between a rectangular steel tube column and a steel frame beam is reinforced without cutting the column.

[Problems to be Solved by the Invention]

At the joint between the rectangular steel pipe and the steel beam, it is necessary to dispose a diaphragm for the purpose of stress transmission and for the purpose of reinforcement. Through-diaphragm method that joins to the end face of the cut pillar, inner diaphragm method that puts in the upper and lower flange positions of the beam inside the pillar cut at the web position of the beam, and outer diaphragm that joins the outer circumference without cutting the pillar It is roughly divided into methods.

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 in that portion because the out-of-plane 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]

In the present invention, on the side surface of the column, vertically elongated slits are formed in parallel with each other in the upper and lower flange positions of the steel beam, and the rib plate is inserted into the column through the slit to place the rib plate in the column, and by reinforcing the column. Eliminates the need to cut pillars and solves the problems of welding and assembling accuracy after welding when cutting.

The slits are opened vertically in parallel or inclined to form a V-shape, and the rib plates are arranged between the adjacent slits on the two adjacent side faces in a plane and obliquely to the side faces of the columns at each corner of the columns. , Welded to the pillar at the slit position and integrated.

The upper and lower flanges of the steel beam are welded to each other across two rib plates arranged in parallel with the welding position of the rib plate.

When the slit is formed in a V shape, a part of the rib plate is joined to the web of the steel beam so that it bears the vertical component of the steel beam and transmits the bending moment from the web to the column.

〔Example〕

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

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

The present invention relates to a pillar 2 of a rectangular steel pipe in which slits 2a are formed at the upper and lower flange positions of the steel beam 1 on the side surface as shown in FIG. The rib plate 3 is arranged and the steel beam 1 is joined.
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. .

As shown in the drawing, two slits 2a are opened in parallel in the flange position of the steel beam 1 in parallel, and the rib plate 3 is inserted into the column 2 from this slit 2a, and adjacent slits on two adjacent side surfaces are adjacent to each other. On the plane between 2a and 2a, it is laid across the side surface of the pillar 2 obliquely. As shown in FIG. 2, the width of the rib plate 3 is set so that the end face does not protrude from the surface of the column 2.

The rib plate 3 has slits 2a, 2 on both end surfaces as shown in the drawing.
It is welded to the side surface at the a position and integrated with the pillar 2.

Each flange of the steel frame beam 1 straddles two rib plates 3 and 3 on one side surface of the pillar 2 and is welded and joined to the side surface of the pillar 2 and the rib plates 3 and 3.

When the constructions of the orthogonal steel beams 1 and 1 are different as in the embodiment of FIG. 1, the upper and lower flanges of both steel beams 1 and 1 have a required length so as to be accommodated within the position of the rib plate 3. The rib plate 3 is used.

Further, when the pillar 2 is a side pillar or a corner pillar, the joint portion is formed by applying the general portion shown in the embodiment.

FIG. 3 shows an embodiment of the invention described in the second claim.

As shown in I, at least one of the upper and lower slits 2a, 2a is opened in a V shape, and a trapezoidal rib plate 3 is tilted in the column 2 with respect to the vertical as shown in III. The arrangement is such that the web of the steel beam 1 is directly joined to the rib plate 3 so that the bending moment from the web of the steel beam 1 can be transmitted to the column 2.

〔The invention's effect〕

The present invention is as described above, the rib plate is arranged in the pillar through the slit provided on the side surface of the pillar, both ends of the rib plate are welded to the pillar, and the steel beam is welded to the pillar side surface and the rib plate. Is reliable, and it is not necessary to cut the column to reinforce the column, and it is possible to solve the trouble of welding after cutting and the problem of welding or assembling accuracy.

Further, in the second aspect of the present invention, the slit is opened in a V shape, the rib plate is directly joined to the web of the steel beam, and the rib plate is arranged so as to be able to bear the component in the vertical direction. Can be communicated.

[Brief description of drawings]

FIGS. 1 and 2 are perspective views and plan views showing an embodiment of the invention of the first claim, and FIG. 3 is an embodiment of the invention of the second claim, and I and II are respectively. Perspective view, top view,
III is an elevation view showing a rib plate. 1 ... Steel beam (bracket), 2 ... Pillar, 2a ... Slit, 3 ... Rib 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 (2)

[Claims] 1. A structure for joining a column of a rectangular steel pipe in which longitudinal slits are formed parallel to each other at upper and lower flange positions of a steel beam on a side surface and a steel beam, and between adjacent slits on two adjacent side surfaces. In addition, a rib plate that can be inserted into the inside of the pillar through the slit is installed on the plane so as to be oblique to the side surface of the pillar, and this rib plate is welded to the pillar at the slit position and is parallel to the welding position of the rib plate. A column-beam joint structure formed by welding the flanges of steel beams across the rib plates. 2. A slit which is parallel to at least one of the upper and lower flanges of the steel beam is inclined with respect to the vertical and has a V shape on the vertical surface, and the rib plate has the shape of this slit. The column-beam joint structure according to claim 1, wherein the column-beam joint structure is arranged along the line and inclined with respect to the vertical.