JPS63289140A - Construction method for anchoring main bar of reinforced concrete beam - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a construction method for fixing the main reinforcement of a reinforced concrete beam to a reinforced concrete column.

[Conventional technology]

In high-rise buildings with reinforced concrete structures, large-diameter reinforcing bars are often used as the main reinforcement for columns and beams. In addition, the main beam reinforcement is fixed in the column by bending the end of the reinforcing bar downward.

[Problem that the invention seeks to solve]

In the above-described beam main reinforcement anchoring method, thick reinforcing bars are concentrated in the panel area at the intersection of columns and beams, which causes problems such as poor workability in the panel area and deterioration of the adhesion between the reinforcing bars and concrete.

This invention was devised in order to solve the above-mentioned conventional problems, and its purpose is to make it easier to fix the Li-bars than in the conventional construction method, and to avoid the crowding of reinforcing bars in the panel area, thereby increasing the adhesion of concrete. The objective is to provide a new construction method that can increase the

[Means for solving problems]

This invention for the above purpose installs a cast plate having a concrete flow hole in the center and a plurality of support pieces protruding in parallel on the sides horizontally at the column-beam joint of Reinforced Concrete Co., Ltd.
The above-mentioned problems are solved by placing the main reinforcement of the beam on each of the receiving pieces and erecting the beam at a reinforced concrete company, and by welding the receiving pieces and the main beam reinforcement together.

[For production]

In the above construction method, the beam main reinforcements are fixed to the column main reinforcements through the cast plate, so the reinforcing bars are not concentrated in the panel area, and all the beam main reinforcements can be fixed at the same level.

〔Example〕

In the figure, 1 is a reinforced concrete column, 2 is a main reinforcement, 3 is a precast concrete beam, 4 is a beam main reinforcement, and 5 is a cast plate.

The cast plate 5 has a square shape that fits within the cross section of the reinforced concrete column 1, and has insertion holes 6.6 in its four corner surfaces into which a plurality of column main reinforcements 2 can be inserted. A concrete flow hole 7 is drilled in the center, and a number of ribs 8, 8 are formed on the plate surface to improve adhesion to concrete.

On the west side of the cast plate 5, three upwardly curved receiving pieces 9 of a required length are protruded in parallel.
．． The beam main reinforcing bars 4.4 are placed on 9 and are further connected together by welding.

The cast plate 5 shown in FIG. 5 is made by cutting the four corners so that the main column reinforcements 2 can be easily arranged.

Therefore, the erection of the girder 3 is determined by first inserting the cast plate 5 through the column main reinforcing bars 2.2 exposed at the upper end of the reinforced concrete 1.

Next, suspend the girder 3 and attach the ends of the beam main iron 4.4 to each receiving piece 9.
9, and further welded the beam main iron 4.4 and the receiving piece 9.9.
and are respectively welded and fixed.

〔Effect of the invention〕

As described above, this invention installs a cast plate horizontally at the column-beam joint of a reinforced concrete column, and fixes the main reinforcement of the reinforced concrete beam to the main reinforcement of the reinforced concrete column through the cast plate. There is no concentration of reinforcing bars in the area, and even when using large-diameter reinforcing bars, there is no problem of poor workability or deterioration of the fixing performance of the reinforcing bars and concrete.

In addition, in normal construction methods, when fixing the main reinforcement of beams in two directions that intersect, it is necessary to make a difference in level because the main reinforcement of both beams overlaps each other at the column-beam joint. In this case, the main reinforcing bars of all beams can be fixed at the same level, so construction can be carried out without making any difference in level. As a result, the structural performance of the girders is further improved, and construction is also easier. It has the following features.

[Brief explanation of the drawing]

The drawings show one embodiment of the reinforced concrete beam main bar anchoring method according to the present invention, and FIGS. 1 and 2 are process explanatory diagrams, FIG. 3 is a plan view of FIG. 1, and FIG. 4 is a diagram of FIG. 2. FIG. 5 is a plan view of a cast plate of another embodiment. 1... Reinforced concrete column 2... Column main reinforcement 3... Beam 4... Beam main reinforcement 5...
Cast plate 6... Insertion hole 7... Concrete flow hole 8... Rib 9... Receiving piece Fig. 1 Fig. 3 Fig. 2

Claims (1)

[Claims] A cast plate with a concrete flow hole in the center and multiple support pieces protruding in parallel on the sides is installed horizontally at the column-beam joint of a reinforced concrete column, and the main reinforcement of the beam is placed on each of the support pieces. A method for anchoring reinforced concrete beam main bars, which is characterized in that the beam is erected on a reinforced concrete column by placing the beam on the ground, and the support pieces and the beam main reinforcement are integrally welded.