JPH0833024B2 - How to join precast reinforced concrete columns and beams - Google Patents

Description

The present invention relates to a method for joining precast reinforced concrete column beams.

[Prior Art] Conventionally, as a method for joining precast reinforced concrete columns and beams, JP-A-55-61632, 57-21641, and 61-
151346, Japanese Patent Publication No. 53-22769, 58-30459, 60-
Those described in Nos. 44459, 62-32299, 63-20973, etc. are known.

[Problems to be Solved by the Invention] In any of the above-described conventional joining methods, a precast reinforced concrete beam (hereinafter, also simply referred to as a beam) may be mounted on a column head of a precast reinforced concrete column (hereinafter sometimes simply referred to as a column). ) The lower end beam main bar exposed end is bent upward, and the bent part is surrounded by a reinforcing band, or the opposing bent parts are restrained and fitted with loop streaks or restraint hardware for each pair, and The entire curved portion was surrounded by reinforcing stirrups and cylindrical steel pipes.

However, according to the above-mentioned conventional method, since a large number of reinforcing bars are intricately arranged in the stilt, not only the reinforcing work is not easy and the construction efficiency is low, but also the filling property of the concrete to be placed on the stake is low. Therefore, it has a drawback that the strength of the beam joint is lowered.

[Object of the Invention] Therefore, an object of the present invention is to provide a method for joining precast reinforced concrete column beams, which has a simple reinforcement structure of the column heads, which are beam joints, and which can obtain high anchorage performance of the main beam reinforcement. It is in.

[Means for Solving the Problems] The inventors of the present invention have reached the present invention as a result of extensive studies to achieve the above object.

In the method for joining precast reinforced concrete column beams according to the present invention, at least two precast reinforced concrete beams are mounted on the column heads of the reinforced concrete columns so as to face each other, and after the mounting, concrete is placed on the column heads. In the method of joining precast reinforced concrete column beams, anchor plates are pre-fixed to the exposed ends of the beam main bars of the precast reinforced concrete beams respectively, and when mounting so as to face the column heads, one anchor plate is used. The other anchor plate is hooked and engaged, and the stress applied to the beam main bar on one side is transmitted to the beam main bar on the other side connected by the hooking engagement of the anchor plate.

[Operation] According to the present invention, when the beam is mounted on the pillar head so as to face each other, the anchor plates fixed to the exposed end portions of the beam main bar of the beam are hooked and engaged with each other, whereby The beam main bars of the beams facing each other are connected without arranging the above.

Since the reinforcement structure in the stigma by the joining method of the present invention is an extremely simple structure, the reinforcement work at the site is easy and the concrete filling is easy.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 and 2 are views showing a joint portion of a precast reinforced concrete column beam constructed by the method of the present invention, FIG. 1 is a transverse sectional view, and FIG. 2 is a longitudinal sectional view. Further, FIG. 3 is a schematic perspective view for explaining an engaged state of the exposed end portion of the beam main bar of the reinforced concrete beam.

In FIGS. 1 and 2, 1 is a precast reinforced concrete column or cast-in-place reinforced concrete column, and the precast reinforced concrete beam 2, 3 is attached to the head of the column.
To board.

After mounting the beams 2 and 3, concrete 4 is placed on the head of the pillar. In the figure, 5 is a column main reinforcement, and 6 is a column reinforcement band of the column main reinforcement 5.

As shown in FIG. 3, anchor plates 11 and 12 are preliminarily provided at the exposed end portions of the upper beam main bar 7 and the lower beam main bar 8 of the beam 2 and the upper beam main bar 9 and the lower beam main bar 10 of the beam 3, respectively. The anchor plate 11 is fixed and hooks one anchor plate 11 to the other anchor plate 12 when riding on the head of the column 1. Due to this engagement, the beam main bars 7 to 10 have higher anchoring performance than the through bars because of the existence of the anchor plates 11 and 12.

The anchor plates 11 and 12 are formed with recesses 13 and 14 into which the other beam main bar enters when they are hooked and engaged with each other. That is, one of the anchor plates 11 fixed to the end portion of the upper beam main bar 7 or the lower beam main bar 8 of the beam 2 has the beam 2
Facing upward, there is formed an upward concave portion 13 into which the upper beam main bar 9 or the lower beam main bar 10 of the beam 3 mounted on the head of the column 1 enters. Similarly, the other anchor plate 12 is also formed with a downward recess 14 into which the upper beam main bar 7 or the lower beam main bar 8 of the beam 2 is inserted.

Anchor plate to exposed end of beam main bar 7,8,9,10
The fixing of 11, 12 may be performed by any means as long as sufficient strength is obtained, for example, by fixing by welding, through holes having female threads are formed in the anchor plates 11, 12, and male holes are formed at the exposed ends. A screw is formed and the exposed end is screwed and fixed to the through hole.A through hole is formed in the anchor plates 11 and 12, and the exposed end is inserted through the through hole, and then a nut is attached to the end. The fixing means may be, for example, screwing and fixing, forming a through hole in the anchor plates 11 and 12, inserting the exposed end portion into the through hole, and then bending and fixing the end portion.

Although one embodiment of the present invention has been described above with reference to FIGS. 1 to 3, in the present embodiment, when four beams are cross-shaped on the head of the pillar 1 (joined to the pillar 1). However, the present invention is not limited to this, and can be applied even when the number of beams to be mounted and the mounting positions are different from those of the present embodiment.

Further, in this embodiment, the beam main bars 7 to 8 facing each other,
9 to 10 are arranged with the pitch shifted in the horizontal direction, but as shown in FIG. 4, one anchor plate 11 has a substantially U-shaped cross section, and the other anchor plate is provided in the groove of the U-shaped portion. The engagement of 12 eliminates the need to shift the pitches of the beam main bars 7 to 8 and 9 to 10.
Incidentally, it is needless to say that the anchor plate 12 may have a downward U-shape contrary to FIG.

Further, in FIG. 4, the two anchor plates 11 and 12 are shown.
Although either one of them has a substantially U-shaped cross section, by making both of them U-shaped in cross section, it is possible to omit the concave portion 14 into which the beam main bars 8 to 10 of the anchor plates 11 and 12 enter.

EFFECTS OF THE INVENTION According to the present invention, when the beam is mounted on the pillar head so as to be opposed to each other, the anchor plates fixed to the exposed ends of the beam main bar of the beam are hooked and engaged with each other, whereby The beam main bars of the beams facing each other can be connected without complicating the above and arranging them, and the work efficiency is much higher than the conventional one.

Moreover, since the bar arrangement structure in the stigma obtained by the present invention is an extremely simple structure, not only the bar arrangement work is easy, but also the concrete filling property is high and the fixing performance is high. Therefore, there is an effect that the strength of the beam joint is high.

[Brief description of drawings]

1 and 2 are views showing a joint portion of a precast reinforced concrete column beam constructed by the method of the present invention, FIG. 1 is a transverse sectional view, and FIG. 2 is a longitudinal sectional view. Further, FIG. 3 is a schematic perspective view for explaining an engagement state of the exposed beam main bar of the reinforced concrete beam, and FIG. 4 is a schematic perspective view for explaining another example of the engaged state of the exposed beam main bar. . 1: Pillars 2, 3: Beams 4: Concrete 5: Column reinforcements 6: Column reinforcement bars 7, 9: Upper beam reinforcements 8, 10: Lower beam reinforcements 11, 12: Anchor plates 13, 14: Recesses

Claims (1)

[Claims] 1. A method for joining precast reinforced concrete column beams, wherein at least two precast reinforced concrete beams are mounted on the column heads of the reinforced concrete columns so as to face each other, and after the mounting, concrete is placed on the column heads. , Anchor plates are preliminarily fixed to the exposed ends of the beam main bars of the precast reinforced concrete beams, and one of the anchor plates is hooked to the other of the anchor plates when the anchor plates are mounted so as to face each other. A method for joining precast reinforced concrete column beams, wherein the stress applied to the beam main bar on one side is transmitted to the beam main bar on the other side connected by hooking engagement of the anchor plate described above.