JPH0321736A - Junction structure for pillar and beam - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a column-beam joint structure in which the joint of a square steel pipe column with a steel beam is reinforced without cutting the column.

[Problem to be solved by the invention]

Diaphragms are required to be placed at the joints between square steel pipes and steel beams for stress transmission and reinforcement purposes, but due to the way they are inserted, conventional structures have A through diaphragm method that connects to the end face of a cut column, an inner diaphragm method that attaches to the upper and lower flanges of the beam inside a column that has been cut at the weep position, and an outer diaphragm that connects to the outer periphery of the column without cutting it. It is broadly divided into methods.

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 connections using diaphragms, since the out-of-plane rigidity of the column to which the beam web is attached is small, it is 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, vertically long slits are formed in parallel at the upper and lower flanges of the steel beam on the side of the column, and rib plates are placed inside the column through these slits to reinforce the column, thereby eliminating the need to cut the column. Solve the problem of welding time and accuracy associated with cutting.

The slits are vertically parallel or inclined in a V-shape, and the rib plate is arranged at a part of each corner of the column between the adjacent slits on two adjacent sides so as to obliquely intersect with the column side.
It is welded and integrated to the column at the slit location.

The upper and lower flanges of the steel beam or the bracket located at the end thereof are welded and joined across two rib plates that are parallel to the welding position of the rib plates.

When the slit is formed in a V shape, a part of the rib plate is joined to the web of the steel beam, which 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 explained below based on the drawings showing one embodiment.

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

As shown in FIG. 1, which shows an embodiment in which the column is an inner column, the present invention is applied to a square steel pipe column 2 with slits 2a formed on the side surface, at the brackets, or at the upper and lower flanges of the steel beam 1. Brackets or steel beams 1 are joined by placing reinforcing rib plates 3.

As shown in the figure, two slits 2a are vertically opened in parallel at each flange position of the bracket or steel beam 1, and the rib plate 3 is inserted into the column 2 through the slit 2a, and the rib plate 3 is inserted into the column 2 through the slit 2a, and Adjacent slits 2a, 2
It is installed diagonally across the side of the pillar 2 between the spaces a and straddles it. Rib plate 3
As shown in FIG. 2, the width of the column is such that the end face does not protrude from the surface of the column 2.

The rib plate 3 has slits 2a on both end faces as shown in the figure.
, 2a, and are welded to the side surfaces at positions 2a and integrated into the column 2.

Each flange of the bracket or steel beam 1 spans two rib plates 3.3 on one side of the column 2, and is welded to the side of the column 2 and the rib plate 3.3.

In addition, if the orthogonal brackets and steel beams 1.1 have different prerequisites as in the example shown in Fig. A rib plate 3 having the following characteristics is used.

Further, when the pillar 2 is a side pillar or a corner pillar, the joint part can be constructed by applying the general part shown in the embodiment.

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

In this invention, at least one of the upper and lower slits 2a, 2a is formed in the shape of ■ as shown in I, and the plate 3 is formed in the shape of a trapezoid as shown in By directly joining the web of the steel beam 1 to the rib plate 3, the bending moment from the web of the steel beam 1 can be transmitted to the column 2.

〔Effect of the invention〕

This invention is as described above, and since a rib plate is placed between the slits provided on the side of a column and welded to this, and a bracket or a steel beam is welded to the side of the column and this rib plate, the force is reduced. The transmission of information is reliable, and the problem of welding time and accuracy associated with cutting columns, etc. is solved, and construction is greatly facilitated.

In addition, in the second claimed invention, the slits are V-shaped, the rib plates are directly connected to the web of the steel beam, and the rib plates are placed in a state that can bear the vertical load, so that the bending moment from the steel beam is absorbed by the beam. can be transmitted to.

[Brief explanation of drawings]

FIGS. 1 and 2 are perspective views showing an embodiment of the invention according to the first claim. The plan view and FIG. 3 show an embodiment of the invention as claimed in claim 2, and 2 and 3 are respectively a perspective view and a plan view, and 2 is an elevational view showing a rib plate. l... Steel beam (bracket), 2... Column, 2a
...slit, 3...rib plate. 1213

Claims (2)

[Claims] (1) A joint structure between a square steel pipe column and a steel beam, in which longitudinal slits are formed in parallel at the upper and lower flanges of the steel beam on the side, and a rib is formed between the adjacent slits on two adjacent sides. A plate is installed diagonally across the side of the column, and this rib plate is welded to the column at the slit position, and a bracket or each flange of the steel beam is welded at the welding position of the rib plate, spanning the parallel rib plates. Column/beam joint structure. (2) The slit on at least one side of each of the upper and lower flange positions is V-shaped, and the rib plate is arranged along the shape of the slit and inclined with respect to the vertical. Column/beam joint structure as described.