JPH05339986A - Structure of beam connection for pc column - Google Patents

Abstract

PURPOSE:To ensure sufficient connecting strength for column/beam connection by incorporating a panel zone into the column/beam connecting part of a PC column. CONSTITUTION:A reinforcing unit 16 is embedded into a connecting part 14, to which a beam is connected, of a PC column 10. The reinforcing unit 16 is so arranged that each of its faces can be made flush with each of column faces 10a, and is constructed of connecting plates 18 that are connected to the beams and interlinking members 20 that interlink the connecting plates 18 one another in the inside of the PC column 10. Reinforcements 22 are provided, sticking out from the outer face of the connecting plates 18, and beam main reinforcements 12 are connected to the front ends thereof through splice sleeves 24. The interlinking members 20 are formed of steel plates, one of which is put on top of another in crosswise, and each of the connecting plates 18 is fixed to each of the front ends of the cross-shaped interlinking members 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam joint structure of a PC column in a portion where a PC (precast concrete) column and a steel frame / reinforced concrete beam are joined.

[0002]

2. Description of the Related Art In recent years, structural materials for construction such as pillars, beams and floors have been formed from precast concrete.
By building the C member on site, the formwork construction can be significantly simplified and, in the end, significant labor saving can be achieved.

For example, a PC pillar is preliminarily molded as a square pillar or a round pillar in a factory or the like, and after the PC pillar is carried into a site and built, a beam is connected to the PC pillar.

[0004]

However, in such a conventional PC pillar, since the PC pillar is formed as a uniform cross-sectional structure over the entire length thereof, the joining portion between the PC pillar and the beam is formed. However, it was extremely difficult to secure the column-beam joint strength. Therefore, there has been a problem that the on-site productivity at the column-beam joint, that is, the labor productivity and the cost mainly for the short construction period are deteriorated.

Therefore, in view of the conventional problems, the present invention integrates a panel zone into a column / beam joint portion of a PC column so that the column / beam joint strength can be sufficiently secured. An object of the present invention is to provide a beam joint structure.

[0006]

In order to achieve the above object, the present invention provides a reinforcing unit for straddling each pillar surface of a PC pillar and connecting beams to each other from the inside of the PC pillar. Is embedded in the joint between the PC column and the beam.

In addition, in such a structure, a reinforcing plate is exposed on each of the pillar surfaces of the PC pillar and is connected to the beam, and
It is preferable that the joining plates exposed on the respective pillar surfaces are provided with a connecting member that joins each other inside the PC pillar.

[0008]

In the beam-joint structure of the PC pillar of the present invention having the above-described structure, the PC pillar is connected to the beam at the joining portion from the inside of the PC pillar by straddling each pillar surface of the PC pillar. By embedding the reinforcing unit for connecting the beams to each other, the beams joined to the PC columns can be connected to each other via the reinforcing units, and the columns and the beam proof stress of the joining portion can be sufficiently secured. it can.

Further, in such a construction, the reinforcing unit is exposed on each pillar surface of the PC pillar and is connected to the beam, and
By constructing the joining plate exposed on each pillar surface with the connecting member that joins each other inside the PC pillar, since the respective beams can be directly joined through the joining plate, the bonding strength thereof Can be significantly increased, and the column and beam proof stress can be further improved.

[0010]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a main part showing an embodiment of a beam joint structure of a PC column according to the present invention.

In FIG. 1, reference numeral 10 denotes a PC column, which is manufactured by, for example, centrifugal molding in a factory or the like. The PC column 10 is formed as a hollow body having a rectangular cross section. Then, the PC pillar 10 that has been manufactured in a factory or the like is carried into the site and installed in the pillar construction site.
In addition, a column main bar and a spiral bar are embedded in the wall thickness of the PC column 10.

Beams (not shown) are joined to the respective pillar surfaces 10a of the PC pillars 10, and the PC pillars 10 are connected to each other via the beams. In this embodiment, the beam main bar 12 is shown in the same figure.

Here, in this embodiment, the PC pillar 1 is used.
The reinforcing unit 1 is attached to the joining portion 14 to which the beams of 0 are joined.
6 is buried. Reinforcement unit 16
Are bonded to each of the pillar surfaces 10a so as to be flush with each other and connected to the beams.
And a connecting member 20 that is connected to each other inside the 0.

The joining plate 18 has a rectangular shape arranged along the column surface 10a, and a reinforcing bar 22 is fixed to the outside of the joining plate 18 in correspondence with the beam main bar 12 by an enclosed arc welding. The splice sleeves 24 are attached to the tip ends of the respective reinforcing bars 22 while being installed and projected. The beam main bars 12 are fitted and connected to the splice sleeves 24, respectively.

On the other hand, the connecting member 20 is formed by connecting steel plates in a cross shape, and the connecting member 20 is connected to the joining plate 18.
Are provided above and below. The joining plate 18 is fixed to each tip of the cross-shaped connecting member 20 by welding.

Therefore, the reinforcing unit 16 is connected to the PC column 1.
When it is embedded in the connecting portion 14 of 0, the connecting member 20 is connected inside the PC column 10 across the joining plates 18 facing each other.

In the beam joint structure of the PC column according to the present embodiment having the above-described structure, the reinforcing unit 16 is embedded in the connecting portion 14 between the PC column 10 and the beam, so that the PC column 10 is connected.
The connecting plate 18 exposed on each pillar surface 10a of the
Can be coupled and supported inside the PC pillar 10.
Therefore, it is possible to remarkably increase the joint strength between the main beam 12 of the beam to be joined to the PC column 10 and, by extension, the beams, and to sufficiently secure the column and beam yield strength. Therefore, by securing the column-beam joint proof strength in this way, it is possible to improve labor productivity and achieve cost reductions mainly due to a short construction period, and
On-site productivity can be greatly improved.

FIG. 2 shows another embodiment, in which the same components as those in the above-mentioned embodiment are designated by the same reference numerals, and a duplicate description will be omitted. That is, in this embodiment, the cross-shaped connecting member 20a of the reinforcing unit 16a is integrally formed, and a plurality of stud dowels 30 are planted inside the connecting member 20a.

Therefore, in this embodiment, when the reinforcing unit 16 is embedded in the connecting portion 14 of the PC column 10, the strength of the connection with the concrete can be remarkably improved by the stud dowel 30.

FIG. 3 shows another embodiment. The reinforcing unit 16b of this embodiment is formed by connecting a pair of upper and lower connecting members 20b through a cross plate 32 interposed between the pair of connecting members 20b. Then, use this reinforcement unit 16b as a PC
Even when it is embedded in the connecting portion 14 of the pillar 10, the strength of the connecting portion 14 is remarkably improved as in each of the above-mentioned embodiments,
It is possible to sufficiently secure the beam joint strength.

In each of the above embodiments, it is desirable to increase the wall thickness of the connecting portion 14 in which the reinforcing units 16, 16a, 16b are embedded. Further, each of the reinforcing units 16, 16a, 16b can be formed by casting instead of being a steel plate.

Further, in this embodiment, since the beam joined to the PC column 10 is disclosed as a reinforced concrete beam,
Although the case where the beam main bar 12 is joined to the reinforcing units 16, 16a, 16b has been disclosed, in the case of a steel-framed reinforced concrete beam, an H-shaped steel serving as a steel frame can be fixedly installed on the joining plate 18.

[0023]

As described above, according to the first aspect of the present invention.
In the beam-joint structure of the PC column shown in FIG. 3, a reinforcing unit for connecting the beam to each other from the inside of the PC column is provided at the joining portion of the PC column and the beam, straddling each column surface of the PC column. Since it is embedded, the strength of the joining portion can be remarkably improved through this reinforcing unit, and the column and beam proof strength can be sufficiently secured. Therefore, it is possible to significantly improve the on-site productivity, save labor and shorten the construction period.

Further, according to a second aspect of the present invention, a joining plate that exposes the reinforcing unit to each pillar surface of the PC pillar and connects it to the beam, and a joining board that appears to each pillar surface are joined to the PC pillar. Since each beam is directly coupled through the joining plate because it is configured with a connecting member that is coupled to each other inside the column, it is possible to further improve the column and beam proof strength. Play.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of the present invention.

FIG. 2 is a perspective view of a main part showing another embodiment of the present invention.

FIG. 3 is a perspective view of a main part showing another embodiment of the present invention.

[Explanation of symbols]

10 PC column 12 Beam main bar 14 Joining part 16, 16a, 1
6b Reinforcement unit 18 Joint plate 20, 20a, 2
0b Connection member 30 Stud Gibel 32 Cross plate

Claims (2)

[Claims] 1. A reinforcing unit for connecting the beams to each other from the inside of the PC pillar is provided so as to extend over each pillar surface of the PC pillar, and the reinforcing unit is embedded in a connecting portion between the PC pillar and the beam. Beam joint structure of PC column which is the feature. 2. The reinforcing unit includes a joining plate that is exposed on each pillar surface of the PC pillar and connects to the beam, and a connecting member that joins the joining plate that is exposed on each pillar surface to each other inside the PC pillar. A beam joint structure for a PC column, which is characterized by being configured as follows.