JPH0427035A - Structure member for joint section of reinforced concrete structure - Google Patents

Abstract

PURPOSE:To simplify formwork by simply placing concrete from the top of form members after arranging beam main reinforcements in the space where a beam is formed after passing pillar main reinforcements for a reinforced concrete pillar through the space from the opening of the form members. CONSTITUTION:Steel form members 3 are arranged in the length direction of the members 3 on a reinforced concrete pillar to a Ushaped cross section with an opening on the top. After pillar main reinforcements 10 for a reinforced concrete pillar is inserted into this pillar and beam connecting section from an opening 6B and beam main reinforcements 4 are arranged in the space where a beam is formed, concrete is simply placed from the top of the members 3. The concrete at the beam section 1 and pillar and beam connecting section 7 is sufficiently restricted by steel plate members 2 so as to reinforce the section 7 against the shear force applied to the section 7. Therefore, the beam section 1 and the pillar and beam connecting section 7 can be formed continuously in one body and, at the same time, the formwork can be simplified.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a structural member for a joint part of a reinforced concrete structure, and more specifically, it relates to a structural member for a joint part of a reinforced concrete structure. The present invention relates to a structural member for a joint part of a reinforced concrete structure that is integrally constructed.

(Prior art) Traditionally, for formwork work for this type of reinforced concrete structure, wooden formwork was used, and after pouring concrete, the formwork was removed and members were formed and installed. Common.

(Problem to be solved by the invention) However, construction using such wooden formwork requires advanced technology, and in particular, processing and installing formwork at the joints of columns and beams is very time-consuming. Problems arise from the current lack of highly skilled workers.

In addition, as buildings have become taller in recent years, the stress generated in structural materials, especially beams, columns, and beam joints during earthquakes has become extremely large, and conventional shear reinforcing bars are the only way to strengthen against shear forces. However, it is no longer possible to ensure sufficient strength. In addition, if you try to arrange shear reinforcing bars to ensure sufficient reinforcement, you will need to increase the diameter of the reinforcing bars, resulting in a complicated bar arrangement, making it difficult to wrap around the concrete. It will cause problems.

The present invention was made in view of the above-mentioned circumstances, and its purpose is to facilitate formwork work such as formwork processing and installation of the joints of columns and beams, as well as reinforcing construction, and to prevent earthquakes. It is an object of the present invention to provide a structural member for a joint part of a reinforced concrete structure that can effectively reinforce against shearing forces applied to a beam, a column, and a joint part of a beam due to repeated external forces.

(Means for Solving the Problems) In order to achieve the above object, in the joint structural member of a reinforced concrete structure according to the present invention, the beam part and the column/beam joint part are continuously and integrally formed. A formwork member made of a steel plate is formed in a U-shaped cross section that is extended in the length direction and is open at the top, and is placed on a reinforced concrete column. A reinforcing plate is installed and spans between the upper edges of the formed part of the beam part of the formwork member, and a reinforcing plate is formed on the formed part of the column/beam joint part of the formwork member to allow the column main reinforcement of the reinforced concrete column to pass through. The opening, the splint plate attached to the side surface of the formed part of the column/beam joint part of the formwork member, and the hanging board provided between the sides of the formed part of the column/beam joint part of the formwork member. It is characterized by having

(Function) To describe the function of the present invention, the beam part and the column/beam joint part are continuously and integrally formed using a formwork member formed of a steel plate material, and the column/beam joint part is formed continuously and integrally. In this section, an opening for inserting the column main reinforcement is formed in the formwork member to ensure connection with the column main reinforcement, and concrete is simply poured into the formwork member constructed in this way from above. Simplify frame work. In addition, the formwork member itself is reinforced by a reinforcing plate placed on the formed part of the beam part of the formwork member, and a hanging plate placed over the formed part of the column/beam joint of the formwork member is used to strengthen the inside of the formwork member. The concrete in the column/beam joints is sufficiently restrained to provide reinforcement against shearing forces, and the splints attached to the sides of the formed parts of the column/beam joints of the formwork members are used to prevent earthquakes during concrete pouring. This prevents the formwork member itself of the formed portion of the column/beam joint from bending and yielding due to external forces such as.

(Embodiments) Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show a first embodiment of the present invention.

The present invention basically consists of forming a beam part 1 and a column/beam joint part 7 in a U-shaped cross section that is extended in the length direction and open at the top in order to continuously and integrally mold the beam part 1 and the column/beam joint part 7. It is hung between a formwork member 3 made of a steel plate placed on a reinforced concrete column and an upper edge of a beam formed part of the formwork member 3, which is arranged at intervals in the length direction of the formwork member 3. The passed reinforcing plate 2C, the opening 6b formed in the molded part of the column/beam joint of the formwork member 3 and through which the column main reinforcement 10 of the reinforced concrete column is inserted, and the column/beam joint of the formwork member 3 It is constituted by a splint plate 8 attached to the side surface 2b of the molded part, and a bridging plate 9 provided between the side faces 2b of the molded part of the column/beam joint part of the formwork member 3.

A column that is placed on top of an already installed reinforced concrete column (not shown) and connected to this reinforced concrete column.
The formwork member 3 forming the beam joint part 7 and the beam part] has a bottom surface 2
a and side 2b are entirely formed of steel plate material 2, especially side 1Ij
2b is constituted by a continuous steel plate material 2. In addition, a reinforcing plate 2 is intermittently placed on the upper edge of the beam forming part of this formwork member 3.
C is welded. That is, flat steel plate materials 2 are combined to form a formwork member 3 having a substantially U-shaped cross section, and especially in the beam forming portion, beam main reinforcements 4 are placed inside the substantially U-shaped cross section.
At the same time, reinforcing plates 2C are laid across the upper part, and then concrete is poured to form the beam part 1.

Furthermore, an opening 6b is formed in the bottom surface 2a of the formwork member 3 at the position where the main column reinforcement 10 of the reinforced concrete column is inserted, and the part where the opening 6b is formed forms the column/beam joint part forming part. Thus, a column/beam joint part 7 is formed.

Furthermore, splints 8 extending equal to the length of the opening 6b are welded and fixed to the upper and lower inner sides of both side surfaces 2b of the formwork member 3 forming the column/beam joint 7, respectively.

Also, between the splints 8 of the column/beam joint part 7 in the height direction, there is a space between one side surface 2b of the formwork member 3 and the other side surface 2b.
A spanning board 9 is spanned across the beam in a direction perpendicular to the reinforcement direction of the beam main reinforcements 4, and their ends are fixed to the side surface 2b.

The main column reinforcement 10 of the reinforced concrete column is inserted through the opening 6b into the formed part of the column/beam joint part of the formwork member 3 configured as described above, and the main beam reinforcement 4 is arranged inside the formed part of the beam part. After setting, concrete is simply poured from above the formwork member 3. Thereby, the beam part 1 and the column/beam joint part 7 can be continuously and integrally molded, and the formwork work can be simplified. In addition, the reinforcing plate 2c allows the formwork member 3
It can strengthen itself. Further, the concrete of the column/beam joint 7 and the beam 1 is sufficiently restrained by the steel plate 2, thereby reinforcing the column/beam joint 7 against shearing force.

Also, the side surface 2b of the formwork member 3 is
There is a risk that the steel plate material 2 may be bent and yielded. In such a case, splints 8 welded to both side surfaces 2b of the formwork member 3
Therefore, the steel plate material 2 of the column/beam joint part 7 is reinforced so as not to yield in bending. Further, by the spanning plate 9 which is spanned and fixed between both side surfaces 2b of the column/beam joint section 7, the concrete inside the column/beam joint section 7 can be restrained more reliably.

FIG. 4 shows a second embodiment of the invention. In this example,
A case is shown in which the width of the column/beam joint part 7a is larger than the width of the beam part 1. In this embodiment, the splint 8a is
Side surface 2 with the same width as formwork member 3 in the beam joint forming part
By inserting the main column reinforcement 10 between the side wall of the column/beam joint 7a and the splint 8a, the concrete inside and outside is restrained, and the column/beam This prevents bending yielding of the side surface of the joint portion 7a. Other configurations and operations are the same as in the first embodiment.

(Effects of the Invention) In summary, according to the structural member for the joint part of a reinforced concrete structure according to the present invention, the beam part and the column/beam joint part are continuous and integrally formed by the formwork member formed of steel plate material. It can be formed into. In addition, by creating an opening at the position where the main column reinforcement of the formwork member will be inserted and forming the column/beam joint part, the connection structure with the reinforced concrete column is secured, and the formwork work is significantly reduced. It can be simplified and construction problems can be solved. Furthermore, the formwork member itself can be reinforced by the reinforcing plate placed on the beam forming portion of the formwork member. In addition, the hanging plate that spans the formed part of the column/beam joints of the formwork members can sufficiently restrain the concrete in the column/beam joints within the formwork members to provide reinforcement against shearing forces. can. In addition, formwork member columns and
A splint attached to the side surface of the formed part of the beam joint prevents the formwork member itself of the formed part of the column/beam joint from bending and yielding due to external forces such as during concrete pouring or earthquakes. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a side view thereof, and FIG. 4 is a second embodiment of the present invention.
FIG. 2 is a plan view showing an example.

Claims (1)

[Claims] A cross section U that is extended in the length direction and is open at the top to form the beam part and the column/beam joint part continuously and integrally.
A formwork member made of a steel plate, which is formed in a letter shape and placed on a reinforced concrete column, and an upper edge of a beam forming part of the formwork member, which is arranged at intervals in the length direction of the formwork member. The reinforcing plate stretched between the reinforcing plate, the opening formed in the formed part of the column/beam joint of the formwork member and through which the column main reinforcement of the reinforced concrete column is inserted, and the column/beam joint of the formwork member. The splint attached to the side of the mouth molding part and the pillars and columns of the above formwork member.
A structural member for a joint part of a reinforced concrete structure, comprising a hanging plate provided between the side surfaces of a formed part of a beam joint part.