JPH04143B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a beam/floor slab joint structure in which a ribbed PC plate is rigidly joined to a beam in a panel zone.

[Problem that the invention seeks to solve]

Generally, the PC version is designed as a simple beam,
The cross-sectional area is determined by the bending strength at the center, and PC plates are made with a single cross-section at both the ends and the center.
In other words, if designed as a simple beam, the PC version would bear a large amount of bending moment mainly in the center, and other parts would have surplus strength and would be idle, resulting in an overall uneconomical design.

This invention was made by focusing on the uneconomical nature of the PC plate, and aims to enable a rational and economical design of the PC plate by adopting a joint structure that allows the PC plate to be regarded as a continuous beam. be.

[Means for solving problems]

This invention aims to rationalize the design by rigidly connecting the PC plate to the beam in the panel zone and making it possible to design it as a continuous beam.

A PC plate with ribs is used for the PC plate, and a notch is provided on the side surface above the rib portion to allow concrete to flow in between the joints with the beams.

This ribbed PC plate is placed perpendicular to the beam in the form of a stool, and U-shaped slab reinforcements protruding from the ends of both ribbed PC plates are placed on the beam to form a slab and the By pouring cast-in-place concrete between them, they are integrated, forming a joint structure in which the ribbed PC board and the beam are rigidly connected.

As a result, the joint between the beam and the slab has a structure that resists the negative bending moment generated at the end of the PC slab due to the integrated ribs, the concrete filled between the joint, and the slab reinforcement. This will reduce the bending stress and deformation of each PC plate by making it a continuous beam.

〔Example〕

The present invention will be explained below based on drawings showing embodiments.

In this invention, a ribbed PC plate 1 with a notch b formed in the upper side surface 1a of the rib 5 is installed so as to butt against a beam 2, and a slab strip 3 is installed across both PC plates 1,1.
Reinforcement is placed on beam 2, and concrete 4 is placed on PC plates 1 and 1 and at joint A and between the beam and PC plate 1.
This is a joint structure between a beam and a floor slab, which are integrally cast, and the PC slab 1, which is continuous in one direction, is rigidly connected so that it can be regarded as a continuous beam.

PC version 1 has a single T-shaped slab with rib 5,
Double T-type slabs, channel-type slabs, etc. are used.

In the embodiment shown in FIGS. 1 to 3, the slab reinforcement 3 is
This is a case where it is protruded from the side surface 1a of the PC version 1 and used as an anchor.

The notch b is provided on the side surface 1a above the rib 5 portion as shown in Fig. 1, and the PC plate 1 is placed in a seat shape with a space between it and the beam 2 as shown in Figs. 2 and 3. Place it. Figure 2 shows the case of steel beams, and Figure 3 shows the case of steel beams.
Although the cases of RC and PC beams are shown, in the embodiment, a protrusion 2a is provided on the side surface of the beam 2 for convenience in installing the PC plate 1.

The PC plates 1, 1 are placed on the protrusion 2a in a seat-like manner, facing each other at the ribs 5, and the slab reinforcements 3 are positioned on the beams 2. Concrete 4 is then placed simultaneously on the PC board 1 at the joint A, that is, between the beam 2 and the side surface 1a of the PC board 1, to form a joint structure. At this time, the concrete 4 poured on the PC board 1 flows into the space between the beam 2 and the side surface of the PC board 1 through the notch b and is filled.

In the embodiment shown in FIGS. 4 to 6, the slab reinforcement 3 is
This is a case where reinforcement is placed after the installation of PC version 1.

As in the above embodiment, a PC plate 1 is placed on the protrusion 2a, slab reinforcements 3 are arranged on the PC plates 1, 1, and concrete 4 is poured.

Figure 6 shows an example of construction using steel beams.

〔Effect of the invention〕

This invention is as described above, and since a gap is provided between the ribbed PC plate and the side surface of the beam, and concrete is filled in the gap integrally with the slab, the PC plate is rigidly connected to the beam. This means that the PC version can be designed as a continuous beam. As a result, the bending stress is reduced to 2/3 with the same load, and the deformation is reduced to 1/5 compared to that designed as a simple beam, making it possible to design the PC version rationally and economically.

[Brief explanation of drawings]

Figure 1 is a perspective view showing an example of manufacturing the PC version, Figure 2
5 to 5 are sectional views showing an embodiment of the present invention, and FIG. 6 is a perspective view showing an example of its construction. A... Joint, 1... PC version, 1a... Side,
b...Notch, 2...Beam, 2a...Protrusion, 3...
...slab line, 4...concrete, 5...rib.

Claims (1)

[Claims] 1 A ribbed PC board with a cutout on the side of the rib part that allows concrete to flow into the joint with the beam is placed perpendicular to the beam and with a gap from the side of the beam in a seat shape. A beam/floor reinforcement joint structure in which reinforcement is placed on the beam and concrete is poured between the beams and the slab.