JPS595732B2 - Structure of the joint between a column of RC or SRC structure and a PC beam - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a metal fitting for joining a column of a reinforced concrete or steel reinforced concrete structure to a beam of a reinforced concrete structure.

Conventionally, the method shown in Figure 1 has been most often used to connect reinforced concrete to columns.

In other words, the construction method used was to construct a frame of reinforcing bars for columns 1 and beams 2 at the construction site, build a frame around it, and then pour concrete.

However, with this method, when pouring and shaping concrete, you wait for the concrete to harden and achieve the specified strength before pouring the next concrete, so it takes many days to complete the building and the construction period is long. was a drawback.

Also, reinforcing steel framework work must be done at high places on site.
Construction management was difficult.

Furthermore, in the conventional precast concrete assembly method, the weak point in terms of strength lies in the joints between columns and beams, and there has been a desire to improve the joint method.

The purpose of the present invention is to eliminate these drawbacks, to make it possible to pre-knob reinforced concrete beams, to shorten the construction period, to facilitate the quality control of the beams, and to improve the reliability of the precast concrete assembly method. The purpose of the present invention is to provide hardware for joining columns and beams of reinforced concrete structures.

The hardware for joining columns and beams in a reinforced concrete structure of the present invention consists of a bottom plate having a flat surface that connects with the column, and a protrusion extending perpendicularly from the bottom plate, gradually extending from the base of the protrusion toward the outer end of the bottom plate. In addition to reducing the thickness, the bottom plate is provided with holes at predetermined positions to be welded to the reinforcing bars of the columns.
The protrusion is characterized by having a plurality of grooves formed from the tip of the protrusion toward the base, each having a semicircular cross section and welded to the reinforcing bars of the beam.

By using the joining hardware of the present invention, the reinforced concrete beam can be transported to the construction site in the form of a completed product, and the frame can be completed at the site simply by welding the reinforcing bars of the columns and beams to the joining hardware.

Additionally, since concrete can be mechanically supplied to the joints, the construction period can be much shorter than in the past.

The details of the present invention will be explained based on the drawings showing examples.

FIG. 2 shows a front view of the joining hardware of the present invention, FIG. 3 shows a side view of FIG. 2, FIG. 4 shows a perspective view of a reinforced concrete beam, and FIG. 5 shows a state of joining of a column and beam.

In the joining hardware of the present invention, a bottom plate 3 connected to a column includes a vertically extending protrusion 5.

The bottom plate 3 has a thickness that gradually decreases from the base 5' of the protrusion toward the outer end, and has a hole 4 for welding 10 to the reinforcing bar 9 of the column.
is provided.

The protrusion 5 has a beam 7 extending from the tip of the protrusion toward the base 5'.
A semi-elliptical groove 6 is provided to be welded to the reinforcing bar 8.

Therefore, when assembling columns and beams of a reinforced concrete structure using the joining hardware of the present invention, first fix the joining hardware to the pillar 1 by welding 10 the reinforcing bars 9 inserted into the pillars using the holes 4 in the bottom plate 3, Next, the reinforcing bars 8 of the beam 7 are aligned with the semi-elliptical grooves 6 of the joining hardware and welded together.

Thereafter, concrete or mortar is poured into the space 11 to fill it, and the frame is completed.

Note that the groove 6 may have a semicircular or angular shape, for example, in accordance with the cross-sectional shape of the reinforcing bar 8.

The joining hardware of the present invention can be easily manufactured by processing, casting, or die forging a rolled material.

The joining hardware of the present invention has the following effects.

(1) It becomes possible to pre-build reinforced concrete structures.

(2) It becomes possible to shorten the construction period.

(3) Since the beams are manufactured in a factory, quality control in step 9 becomes easier.

[Brief explanation of drawings]

Figure 1 is a plan view of the joint between columns and beams in the current reinforced concrete structure, Figure 2 is a front view of the joint hardware of the present invention, Figure 3 is a side view of Figure 2, and Figure 4 is a reinforced concrete beam. FIG. 5 is a front view of the joint. 3: bottom plate, 4: hole, 5: protrusion, 5 base, 6: groove.

Claims (1)

[Claims] 1. At the joint between a column and an RC beam in an RC or SRC structure of a civil engineering or building structure, the column consists of a bottom plate with a flat surface that connects with the column and a protrusion extending perpendicularly from the bottom plate. The thickness of the bottom plate decreases from the base of the protrusion toward the outer end of the bottom plate, and a plurality of holes are provided at predetermined positions in the bottom plate, and holes are formed in the protrusion from the tip of the protrusion toward the base. Column and beam joining hardware with multiple grooves is fixed, and the grooves formed in the joining hardware and the reinforcing bars protruding from the ends of the PC beams are welded together, and the space between the pillar and beam joints is welded. RC or SRC structure columns and RC columns characterized by being filled with concrete or other filling material.
Structure of beam joints.