JPH0444556A - Reinforcing structure of column in column-beam joint - Google Patents

Abstract

PURPOSE:To prevent the melting-down of joints as well as eliminate the needs for backing metal by a method in which an opening of a width similar to that of the cross section of a reinforcing material is formed in the thickwise direction of plate, and both ends of a reinforcing material in contact with the inside of a column are cut in parallel with side faces in contact. CONSTITUTION:A reinforcing material 2 is set between adjacent sides in an angular steel tubular column 1, and both ends of the material 2 are welded to the peripheral side of an opening 1a formed on the side to reinforce the column 1. In this case, the width of the opening 1a is equalized to the width of the cross section of the material 2, or is equalized to or made slightly greater than the diameter D of a steel bar or the thickness (t) of plate. Also, both ends of the material 2 are cut in parallel with the side of the column 1 in contact, or in the direction of 45 deg. to the width (thickness or radius) of cross section, where the width of the end face is regulated to be the width (t) of the opening 1a or root 2 times D.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention provides a column-beam joint in which a reinforcing material is placed inside a square steel pipe column at the joint with a steel beam, and the reinforcing material is welded and joined. This relates to the reinforcement structure of columns in.

[Problem to be solved by the invention]

Conventionally, the conventional method of reinforcing the joints of square steel pipe columns with steel beams has been to insert a diaphragm through the column, which is done by first cutting the column at the joint, then welding it after installing the diaphragm. However, this structure involves problems such as much of the diaphragm installation work relies on welding, which requires time and effort, and it is difficult to ensure accuracy.

To address this problem, the applicant has proposed several methods of reinforcing mesh pipe columns that reduce the number of processes and welding (Patent Application No.
258214-5).

This is done by making a slit-shaped opening in the side of the column, inserting a reinforcing material such as a plate or steel rod through this, and placing it diagonally across the adjacent sides (flanges) on a plane, and around both ends of the reinforcing material. The structure is such that the opening is closed by welding, but the reinforcing material is placed at an angle to the side of the column, so
In order to directly insert the reinforcing material into a predetermined position, it is necessary to make the area of the opening larger than the area of the end face of the reinforcing material. As a result, during welding, a new problem arises in that the weld metal may drip from the back side of the base metal, resulting in areas where welding is impossible.

Melting of the weld metal is caused by a relatively large gap around the edge of the reinforcement, which can be solved by placing a backing on the back of the opening; It must be installed separately inside the pillar, and this work requires high precision.

This invention has been made by paying attention to the problems encountered in the welding work of this previously filed invention, and attempts to propose a structure that prevents welding from dripping while eliminating the need for a backing metal.

[Means to solve the problem]

In the present invention, the opening in the side surface of the column is penetrated in the thickness direction, and
By forming the width to be the same as the cross-sectional width of the reinforcing material or to a size that allows the reinforcing material to fit slightly loosely, and at the same time cutting both ends of the reinforcing material parallel to the side surfaces to which they will be connected, The width of the inscribed end face is expanded relative to the width of its cross section, that is, the width of the opening, and this end face also serves as a backing metal for the opening, eliminating the need for this and enabling sound welding, and improving the structure and work. Try to simplify.

The reinforcing material is installed so that it straddles between the adjacent sides of the column, contacts the inner peripheral surface of the column at both ends, closes the opening of the column from the inside in its width direction, and is welded from the outside of the opening to the column. It is joined and reinforced.

〔Example〕

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

In this invention, a reinforcing material 2 is arranged between adjacent side surfaces (flanges) inside a square steel pipe column 1 at the joint with a steel beam, and both ends of the reinforcing material 2 are welded to the side surfaces to reinforce the column 1. As shown in FIG. 1, the reinforcing material 2 is arranged diagonally between the side surfaces of the column l.

As shown in FIGS. 4-1 and 5-2, openings 1a are formed on the side surface of the pillar 1 at both ends of the reinforcing material 2, corresponding to the shape thereof. The former is an example of formation when a plate is used as the reinforcing material 2, and the latter is an example of formation when a steel rod (circular mesh) is used.

In the case of a plate, the opening 1a has a vertically long rectangular shape as shown in Figure 2-I, and in the case of a steel bar, it has a circular shape as shown in ■.
Each side is opened by penetrating it in the thickness direction.

As shown in Fig. 1, the width of the opening 1a is equal to or slightly larger than the cross-sectional width of the reinforcing material 2, that is, the plate thickness t in the case of a plate, and the diameter in the case of a steel bar. The dimensions are as follows.

As shown in the figure, both ends of the reinforcing material 2 are cut parallel to the side surfaces of the column 1 inscribed in each, that is, in a direction of 45° to the width (thickness or radius) direction of the cross section, and the end faces of the reinforcing material 2 are The width is four times the width t or D of the opening 1a, and during installation, the opening 1a was closed from the inside of the pillar 1 in the width direction as shown by the broken lines in Figure 2 - ■ and ■. state. At this time, the back side of the opening 1a is equivalent to placing a backing metal on both end faces of the reinforcing member 2, and it becomes possible to reliably perform welding from the front side while eliminating this.

Here, the procedure for attaching the reinforcing material 2 will be explained with reference to FIG.

First, both ends of the workpiece are cut to form a reinforcing material 2 of a predetermined shape (1), and while one end is held with a holding material 3 such as a screw with a handle for installation convenience (II), the reinforcing material 2
into the opening 1a in the penetrating direction (I[[).

Once the full length is inserted, fold it diagonally,
The other end is held using, for example, the above-mentioned holding material 3 and the washer 4 for taking up the reaction force until welding starts (IV
). The holding material 3 and washer 4 are removed when welding is partially completed.

In this state, welding is performed from the surface side of openings 1a and 1a (
V), the joining of the reinforcing material 2 is completed.

[Effects of the Invention] The present invention is as described above, and the opening is opened by penetrating in the plate thickness direction with a width comparable to the width of the cross section of the reinforcing material, and at the same time, both ends of the reinforcing material inscribed in the column are opened. are cut parallel to the side surfaces they contact, so when installed, the end face, which is four times larger than the width of the opening, closes the back of the opening, giving the same effect as placing a backing metal. This makes it possible to obtain a sound welding condition while eliminating the need for this.
Moreover, the work of attaching the reinforcing material will be simplified.

[Brief explanation of drawings]

Figure 1 is a plan view showing how the reinforcing material is attached to the column, Figure 2
Figures ■ and ■ are elevational views showing the opening when plates and rods are used as reinforcing materials, respectively; Figure 4 - ■ is a perspective view showing the column when plates are used, ■
5-1 is a plan view showing a joint, FIG. 5-1 is a perspective view showing a column using a steel rod, and ■ is a plan view showing a joint. 1...Column, 1a...Opening, 2...
... Reinforcement material, 3 ... Holding material, 4 ... Washer. 2nd rM ■ Figure 1 Figure ■ Partial Figure ■ Figure

Claims (1)

[Claims] (1) At the joint between a square steel pipe column and a steel beam, a reinforcing material is placed inside the column, spanning between the adjacent side surfaces, and both ends of the reinforcing material are welded around the opening formed in the side surface to strengthen the column. It has a reinforced structure, and the opening in the column is made through the plate in the thickness direction, and its width is the same as the width of the cross section of the reinforcing material, or is large enough to allow the reinforcing material to fit slightly loosely, and both ends of the reinforcing material are are cut parallel to the connecting sides, and the reinforcing material is placed in contact with the inner peripheral surface of the column at both ends, closing the opening of the column from the inside in the width direction, and welded from the outside. A column reinforcement structure at a column-beam joint, characterized in that it is joined to a column.