JP3303008B2 - Perforated beam reinforcement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing material for preventing a decrease in strength of a beam or the like caused by formation of a through hole in a building such as reinforced concrete or steel reinforced concrete.

[0002]

2. Description of the Related Art In buildings, as the height and density of the building increase,
Since the equipment piping greatly restricts the floor height of the building, a through hole is often provided in the abdomen of the beam. In the case of reinforced concrete, if a shear force acts on a beam with a hole, stress concentrates around the hole, causing cracks in the concrete.Therefore, it is necessary to ensure the reinforcement around the hole to ensure the quality of the building. Become. The conventional through-hole reinforcement material has a circular reinforcing bar,
Most of them are bent into rectangles or polygons.
They can be broadly classified into types. The required number of these metal fittings is one per hole, two for the integrated type and four for the split type. The reinforcement was often at both ends of the void tube.

[0003]

In order to reinforce the through-holes by using these, the reinforcing members must be arranged by loosening the binding of the slab anchoring muscles and ribs already arranged by the reinforcing steelwork. However, it was not always an effective method in terms of workability. In addition, in any of the reinforcement methods, the final fracture state at the time of the maximum strength is that the cracks in the concrete at the reinforcing material installation site predominantly peel off immediately before reaching the maximum strength, and the final destruction occurs due to the loss of adhesion between the concrete and reinforcing steel. It is clear from various experimental results that the vehicle is in the arriving state. Therefore, paying attention to this destruction situation, the inventor arranged a continuous reinforcing bar even in the central part where the influence of the peeling of the crack is small, so that even if a crack occurs at the edge of the beam width, the entire destruction can be performed to some extent. The present inventors invented a perforated beam reinforcing material, considering that the peeling state due to cracks in the concrete can be suppressed.

[0004]

In order to solve the above-mentioned problems, a perforated beam reinforcing material of the present invention is formed by a single continuous reinforcing bar having a spiral shape over substantially the entire length around a void tube, By forming both ends of the reinforcing bar into a ring shape by welding, or forming a spiral having an angle due to bending toward the center side and the opposite end direction of the void tube over substantially the entire length around the void tube with one continuous reinforcing bar. The gist is that both ends of the reinforcing bar are fixed to one side of the polygon.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The perforated beam reinforcing material of the present invention has a diameter of 6 to 1 mm.
Use one continuous reinforcing bar of about 6 mm. Since the shape is such that it substantially surrounds the entire outside of the void tube, one reinforcing material is sufficient to reinforce one opening. Since the present invention is not a combination of a plurality of parts but a completely integrated reinforcement, it is easy to transport and install. In addition, since it is a simple structure that is formed with only one piece of metal, fixed by welding at both ends and necessary places, and just adjusting the shape,
The shape can be freely changed. For example, it is possible to freely increase the number of rings at both ends, increase the number of springs at the intermediate portion, or reduce the bending angle of the reinforcing bar to increase the number of angles.

The void tube used in the present invention is preferably a hard paper tube. The perforated beam reinforcing material to be formed has a substantially circular or rhombic shape on the whole front surface in which a space for holding the void pipe is formed in the center.

[0007]

[Embodiment 1] An embodiment of the present invention will now be described with reference to FIGS.
A description will be given based on FIG. 1 is an overall schematic perspective view of a perforated beam reinforcing material of the present invention, FIG. 2 is a front view of the perforated beam reinforcing material of the present invention, FIG. 3 is a side view of the perforated beam reinforcing material of the present invention, and FIG. FIG. 1 and 2, (1) is a perforated beam reinforcing material of the present invention, (2) is a spot welded portion, (3) is a void tube, (4) is a ring portion, and (5) is a spiral in FIG. Department. In FIG. 4, (6) is the main beam (7) is the rib (8).
Is the abdominal muscle (9) is a reinforced concrete beam.

As shown in FIG. 1, the perforated beam reinforcing member (1) according to the first embodiment of the present invention is formed so as to surround the outer periphery of substantially the entire length of a circular void tube. As a forming method, a deformed steel bar having a diameter of 6 to 16 mm is formed in a helical shape while leaving both ends thereof, and the final ends are overlapped and welded on a circumference so as to form a ring as shown in FIG. A spot weld (2) is formed. When the perforated beam reinforcing material (1) thus formed is used, as shown in FIGS. 1 and 4, first, the void pipe (3) is placed in the central space of the perforated beam reinforcing material (1). After inserting and arranging the main reinforcement (6) and the ribs (7) as shown in FIG. 4, the position of the through hole is determined and the ink is printed, and the perforated beam reinforcing material in which the void tube is fitted is penetrated. A predetermined reinforced through-hole can be easily obtained by setting the hole in the corresponding place and pouring concrete.

In this embodiment, since the perforated beam reinforcing material is disposed substantially in the entire void pipe in a circular shape, the perforated beam reinforcing material is present all around the void pipe. It is possible to prevent the cracks of the concrete, which are generated in a concentrated manner in the peripheral portion, from spreading to the whole, and it is possible to suppress the peeling state due to the cracks of the concrete to some extent.
Another great effect is that the number of springs, the number of rings at both ends, and the diameter of the rebar can be adjusted in accordance with the shear strength required at that location. Conventional reinforcing members have a predetermined shape, so that it is difficult to respond to the strength, whereas the present invention is very excellent in adjusting ability.

[0010] Further, since the spiral portion (5) shown in Fig. 3 has a spring shape, it can expand and contract in the beam width direction. for that reason,
When the product is transported, it is contracted and transported, and when it is mounted, it is restored to a spring shape and can be used. In addition, since reinforcing bars are spirally arranged on the concrete around the void, the reinforcing strength is increased by that amount, and at the same time, the peeling and peeling of concrete is suppressed even after cracks occur, and this reinforcing metal In addition, it is possible to enhance the adhesion to the concrete such as the ribs and the main bars arranged in the periphery thereof. As a result, it is considered that the strength and the deformation capacity of the entire beam are increased.

Embodiment 2 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a front view of a perforated beam reinforcing member according to a second embodiment of the present invention, FIG. 6 is a side view of the perforated beam reinforcing member of the second embodiment of the present invention, and FIG. It is. In FIG.
(10) is the perforated beam reinforcing material of the present invention, (12) is a spot welded portion, (13) is a void tube, (14) is both ends, and (15) is a central rhombus spring portion in FIG. In FIG. 7, (6) is a beam main reinforcement (7), a rib (8) is an abdominal muscle (9) is a reinforced concrete beam.

As shown in FIG. 5, the perforated beam reinforcing member (10) in the second embodiment of the present invention is formed so as to surround the outer circumference of substantially the entire length of a circular void tube with a rhombic cross section. As a forming method, a diamond shape of a deformed steel bar with a diameter of 6 to 16 mm (A angle of about 60 degrees, B angle of about 120 degrees) is formed, and instead of forming an angle on the same plane, from one end to the other end of the void tube The bending is performed at a three-dimensional angle so that the bending spiral progresses toward it. As shown in the figure, a diamond at the center other than both ends is formed in a spring shape at the same angle so as to surround the void tube at a position closer to the void tube by about 5 cm from both ends.

The perforated beam reinforcing material (1) thus formed
When using (0), as shown in FIG. 7, the void pipe (13) is first inserted into the central space of the perforated beam reinforcement (10), and as shown in FIG. After arranging the streaks (7), the position of the through hole is determined and blacked out, and a perforated beam reinforcing material in which a void tube is fitted is installed at a corresponding portion of the through hole,
By pouring concrete, predetermined reinforced through holes can be easily obtained.

In this embodiment, since the perforated beam reinforcing material is arranged almost entirely on the void pipe, the perforated beam reinforcing material is present on the entire circumference of the void pipe. It is possible to prevent concrete cracks, which occur particularly strongly around the material, from spreading to the whole, and thus, it is possible to suppress the peeling state due to concrete cracks to some extent. Further, since the number of springs, the number of rebars at both ends, and the diameter of rebars can be adjusted and adjusted according to the shear strength required at the location, the invention has a very wide application range. Although the present embodiment has been described with a rhombus, any shape may be used as long as it is polygonal and can be formed in a spring shape.

A central rhombus spring (15) shown in FIG.
Is spring-shaped, so that it can expand and contract in the beam width direction.
Therefore, when the product is transported, it is contracted and transported, and when it is mounted, it can be restored to a spring shape and used. In addition, since reinforcing bars are arranged in a spiral around the concrete around the voids, the reinforcing strength is increased by that amount, and at the same time, the concrete is prevented from peeling and falling off even if cracks occur, and the main reinforcement It is possible to enhance the adhesiveness not only to metal but also to concrete such as auxiliary bars and main bars arranged around the metal. As a result, it is considered that the strength and the deformation capacity of the entire beam are increased.

[0016]

As described above, the perforated beam reinforcing material of the present invention is easier to manufacture because it is an integral type than the conventional one in which a plurality of members are combined and fitted into the void ゛ pipe. In addition to maintaining strength, one reinforcing material is sufficient to reinforce one hole. In addition, because it is an integral reinforcement,
In addition to uniformity in production, handling of transportation, installation, and storage becomes easy.

The perforated beam reinforcing material of the present invention has a diameter of 6 to
Using a single continuous reinforcing bar of about 16mm, the shape is simple by welding at both ends and required locations, so it is possible to reduce the amount of reinforcing bar compared to the conventional method. The shape can be freely changed.
For example, if the number of rings at both ends is two, or the number of springs in the middle part is increased to increase the strength or if the shape is square,
By changing the bending angle, it is possible to form a shape in which the reinforcing material is sufficiently provided at a place where the concrete is likely to crack. In addition, since the reinforcing bars are welded to each other at both ends, the restraining effect around the opening is high.

[Brief description of the drawings]

FIG. 1 is an overall schematic view of a perforated beam reinforcing material according to a first embodiment of the present invention.

FIG. 2 is a front view of a perforated beam reinforcing material according to the first embodiment of the present invention.

FIG. 3 is a side view of the perforated beam reinforcing member according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a use state of a perforated beam reinforcing material according to the first embodiment of the present invention.

FIG. 5 is a front view of a perforated beam reinforcing material according to a second embodiment of the present invention.

FIG. 6 is a side view of a perforated beam reinforcing material according to a second embodiment of the present invention.

FIG. 7 is a diagram showing a use state of a perforated beam reinforcing material according to a second embodiment of the present invention.

[Explanation of symbols]

 1, 10 Perforated beam reinforcing material 2, 12 Spot welded part 3, 13 Void pipe 4, Ring part 5 Spiral part 6 Beam main reinforcement 7 Rib 8 Abdominal muscle 9 Reinforced concrete beam 14 Both ends 15 Central rhombic spring

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04C 5/00-5/20

Claims (2)

(57) [Claims] 1. A three-dimensional rhombus ring formed by a continuous reinforcing bar extending over substantially the entire length of the circumference of a void tube and bent at angles of 60 degrees and 120 degrees toward the center and opposite ends of the void tube. A central diamond is formed, and a rhombic ring is formed at both ends of the rebar at the same angle of 60 ° and 120 °. The central rhombus takes a void tube closer to the void tube than the rhombic rings at both ends. A perforated beam reinforcing material formed in a spring shape so as to surround the beam beam and capable of extending and contracting in the width direction of the void tube. 2. The void tube according to claim 1, wherein the number of spiral turns of the central rhombus is adjusted in accordance with the shear strength required at the place where the through hole is formed. Insert and surround the entire width of the void tube with the perforated beam reinforcing material, arrange main bars and ribs around the opening, determine the position of the through-hole, and perform blackout. A perforated beam reinforcement with a void tube fitted inside is installed at the through-hole installation location, and concrete is poured in. One perforated beam reinforcement is used and the through-hole is adjusted according to the shear strength. Method