JPH11229493A - Beam-column connection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reinforce a beam-column connection, in which an H-steel beam is connected to the flange of an H-steel column by a bolt through a split T- connection, effectively without using welding at all or by scarcely using welding. SOLUTION: L-shaped horizontal sectional reinforcing metal fittings 6 are installed on both sides of the web 1b of an H-steel column 1 so as to be abutted against the internal surfaces of the web 1b and flange 1a of the H-steel column 1. The web 1b of the H-steel column 1 and the reinforcing metal fittings 6 pinching the web 1b from both sides are joined by high-strength bolts 7 penetrated to the web 1b and reinforcing metal fittings 6. The flange 1a of the H-steel column 1 and the reinforcing metal fittings 6 pinching the flange 1a and split T-connections 3 are connected by high-strength bolts 7 penetrated to these flange 1a reinforcing metal fittings 6 and split T-connections 3. The upper-lower flanges of the H-steel beam 2 are united by the high-strength bolts 7 to the upper-lower split T-connections 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure for a beam-column joint of a steel frame of a building, in which an H-shaped steel beam is bolted to a flange of an H-shaped steel column via a split tee. is there.

[0002]

2. Description of the Related Art Conventionally, when an H-shaped steel beam is bolted to a flange of an H-shaped steel column using a split tee, FIGS.
As shown in FIG. 11, a steel plate is welded as a horizontal stiffener 4 to a position corresponding to the height of the web 3 b of the split tee 3 of the column 1, and the flange 1 a of the column 1 is subjected to tensile force and compression force from the split tee 3. Is known.

Further, a reinforcing steel plate is sandwiched between the flange 1a of the column 1 and the flange 3a of the split tee 3,
Further, a structure for reinforcing the flange 1a of the column 1 is also known.

[0004] Further, a split tee 3 above and below the pillar 1
In order to reinforce a large shear force generated by the tensile force and the compressive force from the split tee 3, a steel plate called a doubler plate 5 is provided on the web 1b surrounded by the stiffener 4 and the flange 1a of the column 1. Welding structures are known.

[0005] These structures are introduced in the Architectural Institute of Japan's “Steel Structure Limit State Design Standard (draft)” and the like.

[0006]

In the conventional structure described above, since the stiffener 4 and the doubler plate 5 are attached to the column 1 by welding, the generation of distortion of the column material due to welding heat is unavoidable, and the labor for removing the distortion is reduced. There is such a problem and distortion remains unremoved.

The welding of the doubler plate 5 is performed by
Is welded to the box-shaped bottom surrounded by the flange 1a and the stiffener 4, so that there is a problem that the work is difficult.

The present invention has been made to solve the above-mentioned problems, and does not require any welding, or at least does not directly weld to a column material, and can reduce the tensile force and the compressive force from the split tee. It is another object of the present invention to provide a structure capable of effectively reinforcing the flange and the web of the H-shaped steel column.

[0009]

The invention according to claim 1 of the present application is directed to a beam-column joint in which the upper and lower flanges of an H-shaped steel beam are bolted to the flange of an H-shaped steel column via upper and lower split tees. Horizontal sections L on both sides of the web of H-section steel column
A reinforcing metal member having a U-shape is installed so as to abut the web of the H-shaped steel column and the inner surface of the flange, and the web of the H-shaped steel column and the reinforcing metal member sandwiching the web from both sides are joined by bolts penetrating them. It is characterized in that a flange of a shaped steel column, a reinforcing metal member sandwiching the flange, and a split tee are joined by bolts penetrating them.

[0010] With such a structure, the H-shaped steel column and the H-shaped steel beam can be connected only by bolting using a high-strength bolt or the like without welding, and the upper and lower split tees are formed by L-shaped reinforcing hardware. This provides reinforcement against out-of-plane bending that occurs in the column flange due to tensile and compressive forces from the column. Further, it is preferable that the reinforcing hardware corresponding to the upper and lower split tees be integrated, because the reinforcement against the shear force generated in the column web is made.

A second aspect of the present invention is a case in which a reinforcing metal is provided with a horizontal stiffener, and the stiffener is provided corresponding to the split tee web. By welding the stiffener to the reinforcing metal in advance, the beam-column joint work on site is only bolt joint.

A third aspect of the present invention relates to a case in which the reinforcing metal is limited, and the reinforcing metal is formed by joining two steel plates in an L-shaped cross section through a horizontal stiffener.
In this case, bending of the steel plate is not required.

[0013]

1 and 2 show an embodiment of a beam-column joint according to the first aspect.

In this example, the reinforcing hardware 6 is substantially H-shaped steel beam 2.
A strip-shaped steel plate having a length approximately equal to the width of the flange (height) of the split tee 3 is cold-bent once to form an L-shaped cross section, and bolt holes are formed at predetermined positions. It is. The L-shaped bending may be hot bending. Also,
The drilling of the bolt holes may be performed before bending.

The L-shape may be manufactured by hot rolling or extrusion or other methods instead of bending a steel plate. The L-shaped bending radius is larger than the radius of the root fillet portion of the H-section steel used for the column or the welding bead.

In addition, as shown in FIG. 3, the reinforcing metal member 6 may have a cross section in which bending is performed twice.

As the joining procedure, before the H-shaped steel column 1 is constructed, the flange 3a of the lower split tee 3 with respect to the H-shaped steel beam 2 and one side 6a of the L-shaped reinforcing metal member 6 are used. And these are joined by high-strength bolts 7 so as to sandwich the flange 1a of the column 1, and the other side 6b
Then, the webs 1b of the H-shaped steel columns 1 are joined by high-strength bolts 7 so as to sandwich the webs 1b from both sides.

After the H-shaped steel column 1 is constructed, the H-shaped steel beam 2 is placed on the lower split tee 3 attached to the column 1, and the upper split tee 3, the reinforcing hardware 6, and the H-shaped steel column are mounted. The first flange 1a is similarly joined with a high-strength bolt 7.

FIGS. 4 and 5 show an embodiment of a column-to-beam joint according to claim 2, wherein the reinforcing metal member 6 has an L-shaped cross section.
The horizontal stiffener 4 is welded. The stiffener 4 is welded to the upper and lower split tees 3
This is a position corresponding to the height of b.

FIG. 6 shows an embodiment of a beam-column joint according to claim 3, in which a reinforcing metal member 6 having an L-shaped cross section is not formed of one bent steel plate but is formed of two strips. Is welded to the stiffener 4 in a horizontal direction to form an L-shape. In this case, there is an advantage that the steel plate does not need to be bent.

FIGS. 7 and 8 show another embodiment of the beam-column joint according to the third aspect, in which H-shaped steel beams 2 are attached to both sides of the column 1. FIG.

[0022]

According to the present invention, a stiffener or the like for reinforcing a beam-column joint is not directly welded to a column material.
Generation of welding distortion of the column material can be avoided.

In the case of the first aspect of the present invention, since no welding is required, manufacturing facilities and personnel involved in welding are not required, and quality control is facilitated such that welding inspection is not required.

Also in the case of the inventions according to the second and third aspects, welding can be remarkably reduced as compared with the prior art.

Since it is possible to mass-produce the reinforcing metal in advance and there is no welding step to the column material, the production period can be shortened.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a beam-column joint according to claim 1;

FIG. 2 is a horizontal sectional view corresponding to FIG.

FIG. 3 is a horizontal sectional view showing another embodiment of the beam-column joint according to claim 1;

FIG. 4 is a side view showing one embodiment of a beam-column joint according to claim 2;

FIG. 5 is a horizontal sectional view corresponding to FIG.

FIG. 6 is a horizontal sectional view showing one embodiment of a beam-column joint according to claim 3;

FIG. 7 is a side view showing one embodiment of a beam-column joint according to claim 3 when beams are attached to both sides of a column.

FIG. 8 is a horizontal sectional view corresponding to FIG.

FIG. 9 is a side view showing an example of a conventional beam-column joint.

FIG. 10 is a horizontal sectional view at a stiffener position corresponding to FIG. 9;

FIG. 11 is a horizontal sectional view at a doubler plate position corresponding to FIG. 9;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Column, 2 ... Beam, 3 ... Split tee, 4 ... Stiffener, 5 ... Doubler plate, 6 ... Reinforcement hardware, 7 ... High strength bolt

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshio Makino 4-33, Kitahama, Chuo-ku, Osaka City Within Sumitomo Metal Industries Co., Ltd. (72) Inventor Shinichiro Kato 4-5-33, Kitahama, Chuo-ku, Osaka-shi Sumitomo Metal Industries Co., Ltd.

Claims (3)

[Claims] At a beam-to-column joint where an upper and lower flange of an H-shaped steel beam is bolted to a flange of an H-shaped steel column via upper and lower split tees, horizontal cross sections are formed on both sides of a web of the H-shaped steel column. A H-shaped reinforcing metal member is installed so as to abut the web of the H-shaped steel column and the inner surface of the flange, and the web of the H-shaped steel column and the reinforcing metal member sandwiching the web from both sides are joined by bolts penetrating these. A beam-column joint, wherein the flange of the H-shaped steel column, the reinforcing metal member sandwiching the flange, and the split tee are joined by bolts penetrating them. 2. The beam-column joint according to claim 1, wherein the reinforcing metal has a horizontal stiffener corresponding to the web of the split tee. 3. The reinforcing metal member is formed by joining two steel plates into an L-shaped cross section via the stiffener.
Column-beam joint as described.