JPH0886015A - Reinforced concrete column - Google Patents

Abstract

PURPOSE: To provide intermediate plates in order to increase the restraint force in the lap splice in particular when a reinforcing steel plate is attached to the outer peripheral face of a column and remarkably facilitate the fabrication of the reinforcing steel plate. CONSTITUTION: A reinforcing steel plate 22 is divided into two at the diagonal part except the corners to which intermediate plates 24, 24 are attached. Respective divided ones are used as the divided bodies 22a, 22a. opened at the divided sides. Intermediate plates 24, 24 are welded to respective divided bodies 22a, 22a in this divided state. The opened side ends of the divided bodies 22a, 22a to which the intermediate plates 24, 24 are attached, are butt-jointed and welded with each other to form the whole of the reinforcing steel plate 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced concrete column in which the outer periphery of the column is surrounded by a reinforcing steel plate.

[0002]

2. Description of the Related Art Conventionally, Japanese Examined Patent Publication No. 4-60184 (E0
As disclosed in 4G 21/12), when constructing a reinforced concrete column, the outer periphery of the column, especially the lap joint part of the column main bar is surrounded by a rectangular tubular reinforcing steel plate, There are some that are designed to enhance the restraining effect against splashing and the like. Further, in the case of providing the reinforcing steel plate in this way, as shown in FIG. 6, the middle plate 2 is attached inside the reinforcing steel plate 1 in the shape of a square, and the inside of the reinforcing steel plate 1 is defined into a plurality of constraint regions. It is possible to do it. Further, as a method of defining the restraint region, as shown in FIG. 7, it is possible to attach the middle plates 2a in a state of being separated from each other.

[0003]

However, in such a conventional reinforced concrete column, by providing a reinforcing steel plate, the restraining force of the lap joint portion can be increased and the connection strength of the column main bar can be increased. When the middle plates 2 and 2a are attached as shown in FIG. 7, the restraining force can be further increased. However, the middle plate 2 in FIG. In the case of forming the shape of the intermediate plate 2, since the size of the intermediate plate 2 to be attached later is not appropriate for the reinforcing steel plate 1 which is closed and whose dimensions are fixed, the dimensional accuracy of the intermediate plate 2 cannot be achieved. It is necessary to increase the height, and there is complexity in assembling work for arranging the intermediate plate 2 in a cross shape. Further, when the intermediate plate 2a shown in FIG. 7 is attached in a separated state, the attachment work is simplified because of the separated structure, but it is difficult to obtain a sufficient restraining force. As described above, each of the reinforcing steel plates 1 shown in FIGS. 6 and 7 has a defect, and in each case, a major problem is that the intermediate plates 2, 2a are limited in the limited space in the cylindrical reinforcing steel plate 1. However, there is a problem in that workability is significantly deteriorated.

In view of the conventional problems, the present invention provides a reinforcing steel plate on the outer circumference of a column, in particular, an intermediate plate for increasing the restraining force of the lap joint portion while manufacturing the reinforcing steel plate. It is an object to provide a reinforced concrete column that can be made significantly easier.

[0005]

In order to achieve the above object, the present invention relates to a reinforced concrete column having an outer periphery surrounded by a tubular reinforcing steel plate and having column main bars as a lap joint, at least the lap joint portion. While forming the reinforcing steel plate with a length that surrounds the reinforcing steel plate, the reinforcing steel plate is formed by joining the divided two divided bodies to each other and integrating them, and inside the divided steel plates in the divided state, It is characterized in that an intermediate plate defining a plurality of restraint areas is attached.

Further, the outer periphery is surrounded by a tubular reinforcing steel plate,
And, in the reinforced concrete column in which the column main bars are lap joints, the reinforcing steel plate is formed with a length that surrounds the entire reinforced concrete column, and the reinforcing steel plate is formed by joining two divided bodies to each other and integrating them. At the same time, it is characterized in that, in a divided state, an inner plate that defines the inside of the reinforcing steel plate into a plurality of constrained regions is attached to the inside of each divided body.

[0007]

In any of the above-mentioned reinforced concrete columns, a tubular reinforcing steel plate is formed by joining two divided bodies, and the inner plate is attached to the inside of each divided body, thereby The split body is opened at the split portion, and the working space for mounting the intermediate plate can be remarkably expanded. For this reason, the work of attaching the intermediate plate is significantly facilitated, and the intermediate plate can be accurately fixed. Then, the reinforcing steel plates as a whole can be formed by joining the respective divided bodies to which the intermediate plate is attached.

[0008]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 1 to 3 show an embodiment of a reinforced concrete column according to the present invention, FIG. 1 is a vertical sectional view showing an assembling process of the reinforced concrete column, FIG. 2 is a transverse sectional view showing a main part of a reinforcing steel plate, and FIG. It is a top view which decomposed | disassembled the reinforced steel plate.

That is, the reinforced concrete column 10 of this embodiment
As shown in FIG. 1, a column main bar 14 is installed on the upper surface of the floor 12, and the outer periphery of the column main bar 14 is surrounded by a form 16 to pour concrete. The lower end portion of the column main bar 14 projects from the floor surface 12
8, and the overlapped portion constitutes a lap joint 20.

The outer periphery of the lap joint 20 is surrounded by a rectangular tubular reinforcing steel plate 22 arranged along the inside of the mold 16, and the reinforcing steel plate 22 restrains the lap joint 20 portion. At this time, the length L of the reinforcing steel plate 22 is formed to be substantially equal to the length of the lap joint 20, and only the portion of the lap joint 20 is surrounded. As shown in FIG. 2, the reinforcing steel plates 22 have inner plates 24, 24 arranged in a bracing manner inside a pair of opposing corners.
4, 24 define the inside of the reinforcing steel plate 22 into three restraint regions.

By the way, as shown in FIG. 3, the reinforcing steel plate 22 is divided into two parts at diagonal parts except the corner parts to which the intermediate plates 24, 24 are attached, and the divided parts are divided into divided parts 22a, 22a. And The split bodies 22a, 22a have a shape in which the split sides are open, and in this split state, the intermediate plates 24, 24 are welded to the respective split bodies 22a, 22a. Then, the reinforcing steel plate 22 is entirely formed by abutting and welding the open side end portions of the divided bodies 22a, 22a to which the intermediate plates 24, 24 are attached.

In the reinforced concrete column 10 of this embodiment having the above structure, the lap joint 20 portion is the reinforcing steel plate 2
By being surrounded by 2, the lap joint 20 is restrained to prevent the column main bar 14 and the column main bar 18 which are overlapped with each other from jumping out, and the column main bar 14 and the column main bar 1
8 can be increased, and further, the reinforcing steel plate 22 is provided with the intermediate plates 24, 24 so that the reinforcing steel plate 2
Since the inside of 2 is divided into a plurality, the restraining force of the lap joint 20 can be further increased.

By the way, in this embodiment, the reinforcing steel plate 22 is used.
Is configured as a combination of two divided bodies 22a, 22a, and when the divided bodies 22a, 22a are in a divided state, the inner plates 24, 24 are provided inside the respective divided bodies 22a, 22a. Mounted. Therefore, when the intermediate plates 24, 24 are attached, the respective divided bodies 22a, 22a are in a state in which the divided portions are open, so that the working space for attaching the intermediate plates 24, 24 is significantly expanded. You can Therefore, the welding work for attaching the intermediate plates 24, 24 is significantly facilitated, and the respective intermediate plates 24, 24 are accurately fixed.

In this embodiment, the reinforcing members 22 having a rectangular shape are divided into a pair of diagonal portions to divide the divided members 22a, 22a.
However, the divided portion is not limited to this diagonal portion, and the opposite side portion may be divided into two. Further, since the reinforced concrete column 10 has a rectangular cross section, the reinforcing steel plate 22 is also disclosed as a rectangular tube, but the cross sectional shape is not limited to this and the reinforced concrete column 1 is not limited thereto.
The shape corresponds to 0, and in this case, it is desirable that the divided portion of the reinforcing steel plate 22 be performed at opposing portions.

FIG. 4 shows another embodiment. In the above-mentioned embodiment, the intermediate plates 24, 24 are flat plates and are connected to the inside of the reinforcing steel plate 22 at an acute angle.
a and 24a are bent at both ends to be connected to the inside of the reinforcing steel plate 22 at a right angle.
It becomes easy to avoid that 4a interferes with the main pillar reinforcement 14 and the main pillar reinforcement 18 to be restrained.

FIG. 5 shows another embodiment, in which the length L of the reinforcing steel plate 22 of the reinforced concrete column 10 shown in FIG. 1 is formed according to the length of the lap joint 20. The length L of the reinforcing steel plate 22 is defined by the reinforced concrete column 10
It can also be formed over the entire length of. According to this structure, the effect of restraining the lap joint 20 can be sufficiently ensured, and the reinforcing steel plate 2 is also provided as in the above embodiment.
The excellent action and effect of 2 are also exhibited in this embodiment. Further, considering that the reinforcing steel plate 22 is provided with the intermediate plates 24 and 24a, by appropriately setting the plate thickness of the reinforcing steel plate 22, it is possible to obtain a structure that sufficiently withstands the lateral pressure at the time of pouring concrete into a column. You can also, as shown in the figure,
The reinforcing steel plate 22 can also be used as a driving mold for pillar molding, and the mold work can be eliminated.

[0017]

As described above, in the reinforced concrete column of the present invention, the tubular reinforcing steel plate surrounding the outer periphery of the column is constituted by the joining of the two divided bodies, and each is in the divided state. Since the middle plate is attached to the inside of the divided body, the divided space of each divided body is opened when installing this middle plate, and the working space is significantly expanded, so it is extremely easy and accurate to attach the middle plate. Can be done. Therefore, since the reinforcing steel plate is easily formed, the strength of the entire column including the lap joint portion can be increased and the structure can be constructed at low cost, which in turn can reduce the manufacturing cost. It has an excellent effect.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a reinforced concrete column during construction of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a reinforcing steel plate used in one embodiment of the present invention.

FIG. 3 is an exploded plan view of a reinforcing steel plate used in an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a reinforcing steel plate showing another embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view of a reinforced concrete column during construction of another embodiment of the present invention.

FIG. 6 is a sectional view showing an example of a reinforcing steel plate used for a conventional reinforced concrete column.

FIG. 7 is a cross-sectional view showing another example of a reinforcing steel plate used for a conventional reinforced concrete column.

[Explanation of symbols] 10 Reinforced concrete columns 12 Floor surface 14 Column main bars 16 Formwork 18 Reinforcing bars 20 Lap joint 22 Reinforcing steel plates 24, 24a
Middle plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuzuru Kobayashi 4-640 Shimoseido, Kiyose-shi, Tokyo Inside Obayashi Technical Research Institute Co., Ltd.

Claims (2)

[Claims] 1. A reinforced concrete column having an outer periphery surrounded by a tubular reinforcing steel plate, and main reinforcements of the column forming a lap joint, wherein the reinforcing steel plate is formed to have a length surrounding at least the lap joint portion, and The reinforcing steel plate should be formed by connecting two divided bodies to each other and integrating them, and in the divided state, an inner plate that defines the inside of the reinforcing steel plate into a plurality of restraint regions is attached inside each divided body. Reinforced concrete columns characterized by. 2. A reinforced concrete column having an outer periphery surrounded by a tubular reinforcing steel plate, and main reinforcements of the column forming a lap joint, wherein the reinforcing steel plate is formed with a length that surrounds the entire reinforced concrete column, and the reinforcement is performed. For the steel plate, the two divided pieces are joined together to be integrated, and in the divided state, an inner plate that defines the inside of the reinforcing steel plate into a plurality of constrained regions is attached inside each divided body. Characteristic reinforced concrete columns.