JPH09195444A - Reinforced concrete member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain high strength of a steel pipe by laying pipes at proper intervals by using steel pipes filled with concrete as main reinforcements, and molding a reinforced concrete member by winding reinforcing reinforcements round the steel pipes. SOLUTION: Concrete 2 such as high-strength concrete or fiber concrete is filled in steel pipes 3 composed of thin pipes, and the steel pipes 3 are laid at proper intervals in positions where main reinforcements are arranged. An outer peripheral surface of these steel pipes 3 is formed in a recess-projection shape, and adhesive strength with concrete 2 and 5 filled inside and outside of the steel pipes 3 is increased. Next, The steel pipes 3 preformed in a prescribed length are connected in the lengthwise direction by welding or mechanical joints, and hoops 4 having a diameter corresponding to these steel pipes 3 are wound at proper intervals, and are integrally bound together, and a reinforced concrete column 1 is molded. Therefore, a reinforced concrete member having high strength and high toughness can be formed.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a reinforced concrete member.

[0002]

2. Description of the Related Art In recent years, as many high-rise or super-high-rise reinforced concrete buildings have been constructed, high-strength reinforced concrete members using high-strength reinforcing bars and high-strength concrete have come to be used.

The pillar 14 in this reinforced concrete member
Since high strength and high toughness are required, the reinforcing bar 15 has a high-density reinforcing bar as shown in FIG. The beams also have high-density reinforcement, like the columns.

[0004]

As described above, when the reinforcing bars in the columns and beams have a high-density reinforcing bar, there is a drawback that the workability of the reinforcing bar and the filling property of concrete are deteriorated. further,
When constructing a structure having high strength and high toughness, there was a problem that a building made of reinforced concrete could not be constructed if the reinforcing bar had a high density reinforcement.

The present invention has been made in view of the above problems, and an object thereof is to easily arrange a bar and to provide a concrete filling property when a building having high strength and high toughness is constructed. It is to provide a good reinforced concrete member.

[0006]

[Means for Solving the Problems] A means for solving the above problems is that a steel pipe filled with concrete is formed as main bars at appropriate intervals, and reinforcing bars are wound around the steel pipe. The outer peripheral surface of the steel pipe is formed in an uneven shape, the reinforcing bar is a strip plate, and the concrete in the steel pipe is high-strength concrete or fiber concrete.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of a reinforced concrete member of the present invention will be described below with reference to the drawings. FIG. 1 shows a reinforced concrete column which is an example of an embodiment of a reinforced concrete member. (1) is a transverse sectional view of the reinforced concrete column, and (2) is a longitudinal sectional view thereof.

The reinforced concrete column 1 is used in a high-rise or super-high-rise reinforced concrete building, and a steel pipe 3 is piped at a position where a main bar is reinforced, and these are bound by a stir bar 4.

The steel pipe 3 has a thickness of 6 to 12 mm and a diameter of 100.
It is a thin tube of up to 300 mm and is filled with concrete 2 such as high strength concrete or fiber concrete.

FIG. 2 (3) shows a steel pipe 3 having an outer peripheral surface formed in an uneven shape, and the adhesive strength between the steel pipe 3 and the concrete 2 and 5 filled inside and outside of the steel pipe 3 increases. Further, when a large tensile force is applied to the steel pipe 3, as shown in (4) of the figure, the reinforcing bar 3a can be inserted in the center.

When constructing this reinforced concrete column 1 by cast-in-place, steel pipes 3 having a predetermined length are connected in the longitudinal direction by welding or mechanical joints, and these steel pipes 3 are connected.
The cords 4 having a diameter corresponding to the above are wound at appropriate intervals to be bound together.

In addition to the above, it can be constructed as a precast reinforced concrete column, and in this case, it is assumed that it is replenished and used by the same method as a normal precast reinforced concrete column.

Further, FIG. 3 shows a reinforced concrete column 1 in which a strip 6 is wound around a steel pipe 3 instead of the strip 4, and the strip 4 has a predetermined width and is excellent in workability.

Further, FIG. 4 shows a reinforced concrete column 1 provided with a core tube 7, and the core tube 7 can be piped at any position.

A reinforced concrete beam which is another embodiment of the reinforced concrete member has exactly the same structure as the reinforced concrete column 1.

Next, a method of constructing a building using the reinforced concrete columns and reinforced concrete beams will be described. First, as shown in FIG. 5, the pre-assembled two-layer column bar 8
Is erected at a predetermined place. A beam connecting member 9 made of H-shaped steel is provided between the column bars 8 on the upper and lower floors, and the steel pipe 3 of the column bar 8 is welded to the hoop 10 of the beam connecting member 9 to form the upper and lower columns. The muscle 8 is connected.

Next, as shown in FIG. 8, the end portions of the beam reinforcement are connected to the beam connecting members 9 of the respective column reinforcements 8 and the beam reinforcement 11 is bridged.
The beam reinforcement 11 is formed by using the steel pipe 3 instead of the main reinforcement, like the column reinforcement 8, and is bolted to each connection member 9a by the connection plate 12. A steel frame beam may be used instead of the beam.

Next, two layers of column reinforcements 8 are provided on the upper ends of the column reinforcements 8.
And the beam bars 11 are bridged in the same manner as described above. There is a method shown in FIG. 11 for joining the columnar bars 8 to each other. (1) and (2) show bolt joining, (3) shows weld joining, and (4) shows mechanical joining. can do.

After the reinforcing frame 13 is completed in this way, a mold is assembled, and concrete is cast into this mold to construct a skeleton. Further, FIG. 12 shows a case where the beam connecting member 9 is formed of a reinforcing bar.

Both the reinforced concrete columns and the reinforced concrete beams can be made of precast reinforced concrete, and in this case also, the building is constructed by the same method as described above.

[0021]

EFFECTS OF THE INVENTION A steel pipe filled with concrete is provided as a main bar at appropriate intervals, and reinforcing bars are wound around the steel pipe to form a reinforced concrete member having high strength and high toughness. .

Steel pipes filled with concrete are provided as main bars at appropriate intervals, and reinforcing bars are wound around the steel tubes to form reinforcing bars, so that the reinforcing bars have high strength and high toughness without high-density reinforcing bars. Since the member can be formed, the reinforcing bar can be easily arranged and the filling property of concrete can be improved.

Since the reinforcing bar is a strip plate, workability and strength can be improved.

Since the outer peripheral surface of the steel pipe is formed in a concavo-convex shape, it is possible to increase the adhesive strength with the concrete filled inside and outside the steel pipe.

Since the concrete in the steel pipe is high-strength concrete or fiber concrete, high strength and high toughness of the steel pipe can be achieved.

[Brief description of the drawings]

1] (1) is a cross-sectional view of a reinforced concrete column,
(2) is a vertical sectional view of the same.

FIG. 2 (1) is a horizontal cross-sectional view of a steel pipe, (2) is a vertical cross-sectional view of the same, (3) is a vertical cross-sectional view of another steel pipe, and (4) is a vertical cross-sectional view of a steel pipe with reinforcing bars. is there.

[FIG. 3] (1) is a cross-sectional view of another reinforced concrete column,
(2) is a vertical sectional view of the same.

FIG. 4 is a cross-sectional view of another reinforced concrete column.

FIG. 5 is a front view in which column bars are erected.

FIG. 6 is a front view of a joint portion of a column bar and a beam.

FIG. 7 is a sectional view taken along line AA of FIG. 6;

FIG. 8 is a front view in which beam bars are joined between column bars.

FIG. 9 is a front view of joining a beam reinforcement to a column reinforcement.

FIG. 10 is a front view showing a reinforcing bar and a reinforcing bar.

FIG. 11 is a front view showing a method of joining columnar bars to each other,
(1) and (2) are bolted joints, (3) are welded joints,
(4) shows mechanical joining, respectively.

FIG. 12 is a plan view of joining a beam reinforcement to a column reinforcement.

FIG. 13 is a cross-sectional view of a conventional reinforced concrete column.

[Explanation of symbols]

 1 Reinforced concrete columns 2, 5 Concrete 3 Steel pipes 4 Strips 6 Strips 7 Core tubes

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Mogi 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd.

Claims (4)

[Claims] 1. A reinforced concrete member formed by arranging steel pipes filled with concrete as main bars at appropriate intervals and winding reinforcing bars around the steel pipe. 2. The reinforced concrete member according to claim 1, wherein the outer peripheral surface of the steel pipe is formed in an uneven shape. 3. The reinforced concrete member according to claim 1, wherein the reinforcing bar is a strip plate. 4. The reinforced concrete member according to claim 1, wherein the concrete in the steel pipe is high-strength concrete or fiber concrete.