JP2000265555A - Jointing method between reinforced concrete column and steel beam, and joint construction therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint construction between a reinforced concrete column and a steel beam which can be jointed economically without using a support. SOLUTION: Steel beam members 2 are intersected each other inside a reinforced concrete column and a column and beam connection member 1 is formed. And a steel frame 5 comprising L-shaped steel 4 is provided at each of upper and lower flanges 3, main reinforcement 7 of the column is penetrated to the fitting portions at four corners of the steel frame 5 and an adjust nut 10 is screwed to a threaded steel bar 9 at the main reinforcement 7 of the column.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure between a reinforced concrete column and a steel beam.

[0002]

2. Description of the Related Art Since joints of structures having reinforced concrete columns and steel frames as beams are attached to different types of structural members, FIG.
(1) is used. The beam-column connecting member 13 has a steel frame 17 composed of a flat plate 16 fixed to each of the upper and lower flanges 15 intersecting the steel beam members 14 with ribs 18. As shown in (2) of the figure, when the rotational moment of arrow D acts on the column 19, the steel frame 17 becomes a bearing resistance in the direction of arrow E, and improves the toughness at the joint with the beam. Was playing a role.

[0003]

However, at the time of actual construction, the beam-column joint member as described above is mounted on a precast reinforced concrete column and its level is adjusted, or a support 20 as shown in FIG. The level had to be adjusted.

[0004] The present invention has been made in view of such a problem, and an object of the present invention is to make it possible to adjust the level of a beam-column joint member from the stage of assembling a column main reinforcement, or after assembling. It is an object of the present invention to provide a method of joining a reinforced concrete column and a steel beam capable of adjusting the level of a beam-column joint member without using a support, and a joint structure thereof.

[0005]

According to a first aspect of the present invention, there is provided a column-beam joining member assembled to a beam-joining portion of a column main reinforcing bar which is assembled and arranged. A steel frame made of L-shaped steel is installed on each of the upper and lower flanges of the joining member, and the column main reinforcement is penetrated through fitting portions at four corners thereof, and an adjusting nut in the fitting portion is screwed into a screw reinforcing bar of the column main reinforcing member. The position of the beam-column joint member is adjusted by operating the adjustment nut.

According to the first aspect of the present invention, by operating the adjusting nut screwed into the column main bar, the column main beam is joined without using a support from the stage of assembling the column main bar or even after the column bar is assembled. The adjustment of the position of each member becomes possible.

According to a second aspect of the present invention, in the reinforced concrete column, the steel beam members cross each other to form a beam-column joint member, and a steel frame made of L-shaped steel is provided on each of the upper and lower flanges of the beam-joint member. A plurality of pillar main reinforcements penetrate through fitting portions at the four corners of the steel frame, and adjustment nuts are screwed into threaded reinforcements of these column reinforcements.

According to the second aspect of the present invention, the concrete of the column is constrained by the steel frame made of L-shaped steel, and the steel frame is in surface contact with the flange, so that horizontal and vertical resistance is generated. To improve the proof stress and toughness at the joint.

According to a third aspect, in the second aspect, the fitting portion is a hole or a notch groove.

According to the third aspect of the present invention, the main pillars can be securely fixed by the holes or the notched grooves, so that the reinforcing bars can be easily arranged and prevented from protruding outside of the main pillars. In the case of the notch groove, the steel frame can be easily attached to the main reinforcement.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a joint structure of a reinforced concrete column and a steel beam according to the present invention. First, the joint structure between a reinforced concrete column and a steel beam is explained, and then, a joining method between a reinforced concrete column and a steel beam is explained. FIG. 1A is a perspective view showing a joint structure between a reinforced concrete column and a steel beam, and FIG.
Is a perspective view of a notch groove, and FIG. 2 is a sectional view of the same.

For joining a reinforced concrete column and a steel beam,
A beam-column joint member 1 as shown in FIG. 1 is used. In this column-beam joint member 1, a flat rectangular steel frame 5 made of an L-shaped steel 4 is installed on each of upper and lower flanges 3 of a crossed steel beam member 2, and three main reinforcements are provided in holes 6 at four corners of the steel frame 5. 7 penetrates. The number of the main bars 7 is not limited to three, but is the number necessary for structural design. The pillar main bars 7 are constrained so as not to protrude outside by penetrating the holes 6.

One of the column main reinforcing bars 7 is a screw reinforcing bar 9, and an adjusting nut 10 is screwed into the reinforcing bar 9 to abut and support the upper and lower steel frames 5, thereby supporting the steel frame. 5 need not necessarily be welded to the upper and lower flanges 3. By operating the adjusting nut 10, the beam-column joint member 1 can be freely moved. This means that the position of the beam-column joint member 1 can be adjusted by the adjusting nut 10, that is, the height can be adjusted.

Since the steel frame 5 is in surface contact with the flange 3 as described above, when a rotational moment indicated by an arrow A acts on the column 8 as shown in FIG. And the bearing resistance of the beam is increased to improve the proof stress at the joint with the beam. That is, the steel frame 5 made of the L-shaped steel 4
As well as improving the toughness at the joint with the beam. The steel frame 5 is welded to the steel beam member 2 when a predetermined proof stress is required.
Further, the steel frame 5 may be provided with a notched groove 6a instead of the hole 6.

Hereinafter, a method for joining a reinforced concrete column and a steel beam will be described. FIG. 4 shows a column main joint 7 assembled with a column main bar 7, and threaded reinforcing bars are arranged at four corners of the column main bar. The beam-column joint members are assembled to the three beam-column joints of the column main reinforcement thus assembled. This is not limited to three places, and can be increased or decreased as needed.

At this time, three main reinforcing bars 7 penetrate through the steel frame 5 of each of the upper and lower flanges 3 of the steel beam member 2, and an adjusting nut 10 is screwed into one screw reinforcing bar 9 of the column main reinforcing bars 7. Is holding down the steel frame 5. That is, since the beam-joint 1 can be freely moved by the adjusting nut 10, the position of the beam-joint 1 is adjusted by operating the adjusting nut 10, that is, the height is adjusted (FIG. 1). reference).

After the height adjustment, FIG.
As shown in (1), a reinforcing bar 11 to which the beam-column joint member 1 is assembled is lifted and built by a crane. As described above, it is possible to easily build the reinforcing bar 11 to which a plurality of beam-column joint members 1 are assembled at a time without requiring any support.

[0018]

As described above, the concrete of the column is constrained by the steel frame made of L-shaped steel, and the horizontal and vertical resistance is generated in the steel frame in surface contact with the flange, so that the toughness at the joint can be improved.

By operating the nut screwed into the threaded reinforcing bar, the position of the beam-column joint member, that is, the height can be adjusted.

It is possible to adjust the position of the beam-column joint member, that is, to adjust the height thereof without requiring a support.

[0021] A plurality of beam-column joint members can be assembled to the column main reinforcement at a time.

A reinforcing bar having a plurality of beam-column joint members assembled at once can be easily built.

[Brief description of the drawings]

FIG. 1A is a perspective view showing a joint structure between a reinforced concrete column and a steel beam, and FIG. 1B is a perspective view showing a cutout groove.

FIG. 2 is a sectional view showing a joint structure between a reinforced concrete column and a steel beam.

FIG. 3 is a conceptual diagram illustrating a resistance force generated in a beam-column joint member.

FIG. 4 is a front view in which a beam-column joint member is assembled to a main pillar of a column by a ground structure.

FIG. 5 is a front view showing a method of building a column main bar to which a beam-column joint member is assembled.

FIG. 6A is a perspective view of a conventional beam-column joint member, and FIG.
FIG. 3 is a conceptual diagram showing a resistance generated in a conventional beam-column joint member.

FIG. 7 is a front view showing a conventional method of joining a reinforced concrete column and a steel beam.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 13 Beam-column connection member 2, 14 Steel beam member 3, 15 Flange 4 L-shaped steel 4a Bottom surface 5, 17 Steel frame 6 Hole 6a Notched groove 7 Column main reinforcement 8, 19 Column 9 Screw reinforcement 10 Adjustment nut 11 Reinforcement 16 Flat plate 18 rib 20 support

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shizushi Iwashita 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Hidehito Watanabe 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Inside a stock company

Claims (3)

[Claims] 1. A beam-column joint member is assembled at a beam joint of a column main bar which is assembled and arranged, and a steel frame made of L-shaped steel is fitted to upper and lower flanges of the column-beam joint member, and fitting portions at four corners thereof are provided. A reinforced concrete column characterized by being installed by penetrating a column main bar, screwing an adjusting nut in the fitting portion into a screw reinforcing bar in the column main bar, and adjusting the position of the beam-column joint member by operating the adjusting nut. How to join steel beams. 2. A beam-to-column connection member is formed by intersecting steel beam members in a reinforced concrete column, and a steel frame made of L-shaped steel is provided on each of upper and lower flanges of the beam-and-column connection member. A joint structure between a reinforced concrete column and a steel beam, characterized in that a plurality of pillar reinforcements penetrate through the fitting portion, and an adjusting nut is screwed into the threaded reinforcement of the pillar reinforcements. 3. The joint structure according to claim 2, wherein the fitting portion is a hole or a notch groove.