JP2002276024A - End part joining method of column and beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an end part joining method of a column and a beam for facilitating bar arrangement work of a column main reinforcement and a beam main reinforcement when joining end parts of the column and the beam in an upper floor or a rooftop floor, capable of surely fixing the column main reinforcement and the beam main reinforcement, and requiring no arrangement of a projection for fixing the column main reinforcement on the upper side of the column. SOLUTION: This joining method joins the mutual end parts of the column 1 and the beam 2 of a reinforced concrete building. The end part 15 of the column main reinforcement 11 of the column 1 and the end part 16 of the beam main reinforcement 12 of the beam 2 are joined by a joining member having a tabular member 18 almost orthogonal to the column main reinforcement 11, and a tabular part 19 almost orthogonal to the beam main reinforcement 12, and this joining member 17 is embedded in concrete 10 of the column 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining ends of columns and beams suitable for a reinforced concrete building.

[0002]

2. Description of the Related Art Conventionally, when the ends of columns and beams in a reinforced concrete building are joined at the top floor or the floor, the ends of the column main reinforcement and the beam main reinforcement are hook-shaped, L-shaped or U-shaped. The plate was fixed to the concrete by bending the plate or by attaching plates to the ends of the column main reinforcement and the beam main reinforcement.

[0003]

However, in the conventional method of bending and fixing the ends of the column main reinforcing bars and the beam main reinforcing bars, the column main reinforcing bars and the beam main reinforcing members are more than originally used in the beam-column joint. Since the reinforcing bars are arranged in a complicated manner, there has been a problem that the reinforcing work is difficult and time-consuming.

In the case of using a precast column or pre-casting a column, the space for arranging the main bar of the beam is narrowed, so that the arranging work becomes more difficult and the bent portion of the main bar of the beam is bent. In some cases, it was difficult to secure the fixing length of the toner.

In a method in which a concrete projection is newly provided on the upper part of a pillar and a fixing plate attached to a main reinforcing bar of the pillar is buried in the projection, it takes time and effort to provide the projection, and the roof is waterproof. The projections hindered the sticking of the sheet, and the waterproofing might be incomplete.

Further, when a tensile force acts on the column main reinforcing bar during an earthquake, a supporting force and an adhesive force radially act on the column main reinforcing bar. Therefore, there is a problem in that a force to the side is generated in a balanced manner, and the column main reinforcing bar is pushed outward.

An object of the present invention is to solve such a problem, and when joining the ends of a column and a beam on the top floor or a roof floor, a column main reinforcing bar and a beam main reinforcing bar are used. And the end reinforcement of the column and the beam without the need to provide a projection for fixing the column main reinforcement on the upper side of the column. It is a technical task to provide a method.

[0008]

SUMMARY OF THE INVENTION The present invention is a method for joining the ends of a column and a beam, and is configured as follows to solve the above-mentioned technical problem. That is, the present invention relates to a joining method for joining the ends of a column and a beam of a reinforced concrete building, wherein the end of the column main reinforcing bar of the column and the end of the beam main reinforcing bar of the beam are connected to the column main beam. It is characterized by joining by a joining member having a plate-like portion substantially perpendicular to the reinforcing bar and a plate-like portion substantially perpendicular to the beam main reinforcing bar, and burying the joining member in the concrete of the column.

Further, the present invention provides the column main reinforcing bar provided on the outer surface of the column opposite to the surface to which the beam is to be joined, and the beam main reinforcing bar provided on the upper surface side of the beam. Are joined by the joining member, the end portions of the column main reinforcing bar and the beam main reinforcing bar are fixed to the plate-like portions, each of which is substantially orthogonal, and the arrangement direction of the column main reinforcing bars to be joined by the joining member. When the beam main reinforcing bars are substantially orthogonal to each other, the ends of the column main reinforcing bars and the beam main reinforcing bars are joined by the joining member having an L-shaped cross section, and the adjacent beam main reinforcing bars are connected. It is characterized by being restrained by a character-shaped restraining muscle.

Next, each component of the present invention will be described. (Column main reinforcement and beam main reinforcement) These column main reinforcements and beam main reinforcements use deformed reinforcing bars. There is a bar reinforcing bar. Here, a case where a screw bar reinforcing bar into which a nut can be screwed is used and the joining member is fixed using two nuts screwed into the bar bar can be exemplified. (Joint member) While joining the column main reinforcing bar and beam main reinforcing bar,
An L-shaped cross section can be exemplified as having two plate-like portions that are provided to increase the anchoring force of each main reinforcing bar and are substantially orthogonal to each main reinforcing bar.

According to the present invention, by joining the end of the column main reinforcing bar and the end of the beam main reinforcing bar with a joining member, the column main reinforcing bar and the beam main reinforcing bar are constrained to each other. growing. In addition, since the joining member is provided with a plate-shaped portion substantially orthogonal to each main reinforcing bar and a plate-shaped portion intersecting with the main reinforcing bar, not only the tensile direction of each main reinforcing bar but also the direction intersecting with the tensile direction. The fixing power also increases.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for joining the ends of a column and a beam according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a diagram for explaining a method of joining the ends of a column and a beam according to the present invention. This method of joining the ends of columns and beams is applied when joining the ends of the reinforced concrete columns 1 and the reinforced concrete beams 2 on the top floor or the roof of a reinforced concrete building.

The column 1 and the beam 2 are made of concrete 1
0, and a plurality of column main reinforcing bars 11 and beam main reinforcing bars 12 arranged in the concrete 10. The column main reinforcing bar 11 and the beam main reinforcing bar 12 use a threaded reinforcing bar, which is a deformed reinforcing bar. Column main reinforcing bar 11 is upper end surface 13 of column 1
The beam main reinforcing bar 12 is inserted into the column 1 and extends to the vicinity of the outer side surface 14 on the opposite side to the surface where the beam 2 of the column 1 is joined.

The main reinforcing bars 12, 12... Arranged on the upper surface side of the beam 2 and the main reinforcing bars 11, 12 arranged on the outer side surface 14 opposite to the beam joining surface of the column 1. 11 ...
Are joined by a joining member 17. As shown in FIG. 2, the joining member 17 includes two plate-shaped portions 18 that are substantially orthogonal to the column main reinforcing bar 11 and the beam main reinforcing bar 12, respectively.
19.

In this embodiment, the column main reinforcing bar 1 to be joined is
Beam main reinforcing bars 12, 12 with respect to the arrangement direction of 1, 11,.
Are perpendicular to each other, and the joining member 17 has a substantially L-shaped cross section. Then, ends 15 and 16 of the column main reinforcing bar 11 and the beam main reinforcing bar 12 are fixed to plate-like portions 18 and 19 of the joining member 17, respectively.

End 1 of column main reinforcement 11 and beam main reinforcement 12
When fixing the main reinforcing bars 11 and 12 to the plate-shaped portions 18 and 19, the end portions 15 and 16 are inserted into through holes (not shown) provided in the plate-shaped portions 18 and 19, respectively. Plate-shaped part 1 with two nuts 20, 20 screwed into
Tighten 8,19. Thereby, the plate-like portion 18,
19 is fixed in a state substantially orthogonal to each of the main reinforcing bars 11 and 12.

.. And beam main reinforcing bars 12, 12,... Other than those joined by the joining member 17.
As shown in FIG. 3, a circular plate 21 for fixing is inserted into the ends 15 and 16 of the
It is held at 0,20. Thereby, the plate 2
Numeral 1 is fixed to each of the main reinforcing bars 11 and 12 so as to be substantially perpendicular thereto.

Further, the column main reinforcing bars 11, 11 on the outer peripheral side of the column 1 are provided.
, A plurality of restraining streaks 22 are attached at appropriate intervals in the longitudinal direction, as shown in FIG. Further, the core muscles 32 are superimposed on the upper restraining muscles 22, and the uppermost restraining muscles 22 are doubled. The restraining bars 22 and the core bars 32 are for preventing the column main reinforcing bars 11, 11,... From expanding outward, and by providing them directly below the joining member 17 and the plate 21, their effects are obtained. Can be bigger.

Further, a plurality of adjacent, here two beam main reinforcing bars 12, 12 are provided with a U-shaped cage reinforcing bar 2 from above.
3, 23... Are fitted. As shown in FIG. 5, these car reinforcing bars 23 have leg portions 24 extending downward at an appropriate length.

As described above, according to the column and beam end joining method of the present invention, the beam main reinforcing bars 12 provided on the upper surface side of the beam 2,
12 and the column main reinforcing bars 11, 11 provided on the outer surface 14 side of the column 1 opposite to the joint surface of the beam 2.
Are joined by the joining member 17, so that the column main reinforcing bars 11, 11 and the beam main reinforcing bars 1 are connected to each other.
Are restrained from each other, and the main reinforcing bars 11, 12
Fixing power is increased. Further, since the outermost one of the column main reinforcing bars 11 and the beam main reinforcing bars 12 is joined, it is possible to prevent the main reinforcing bars 11 and 12 inside thereof from protruding outward.

Further, the joining member 17 is provided with two plate-like portions 18 and 19 which are substantially orthogonal to the column main reinforcing bar 11 and the beam main reinforcing bar 12, respectively.
2, the fixing force in the direction intersecting with the pulling direction is increased.

Therefore, even when a radial force is applied to each of the main reinforcing bars 11 and 12 during an earthquake, each of the main reinforcing bars 11 and 12 expands to the outside of the column 1 or the beam 2 and breaks the concrete 10. Can be prevented.

Further, unlike the related art, it is not necessary to bend the ends of the main reinforcing bars 11 and 12 into a hook shape, an L shape, or a U shape, and to attach another cage reinforcing bar or the like. The arrangement of the reinforcing bars at the joints is simplified, and the work of arranging the main reinforcing bars 11 and 12 becomes easy even when the column 1 is precast or when the column is driven in front.

Further, since it is not necessary to provide a projection for fixing the column main reinforcing bar 11 on the upper side of the column 1 as in the prior art,
The roof can be flattened, which makes it easy to attach a waterproof sheet to the roof and makes it possible to reliably waterproof the roof.

In the above embodiment, the column main reinforcing bar 1
1 are perpendicular to the beam main reinforcing bars 12, and the case where these main reinforcing bars 11, 12, 12,... Are joined by the joining member 17 having an L-shaped cross section has been described. As shown, the arrangement direction of the column main reinforcing bars 26 of the columns 25 may not be orthogonal to the beam main reinforcing bars 28 of the beams 27 to be joined thereto.

In such a case, as shown in FIG. 7, an appropriate shape having a plate-like portion 29 substantially perpendicular to the column main reinforcing bar 26 and a plate-like portion 30 substantially perpendicular to the beam main reinforcing bar 28 is provided. By using the joining member 31 of the above, it is possible to easily join the column main reinforcing bar 26 and the beam main reinforcing bar 28, and it is possible to increase the fixing force in the pulling direction of each of the main reinforcing bars 26, 28 and the direction intersecting with this. .

In the above-described embodiment, the end portions 16 of the beam main reinforcing bars 12, 12,...
A description has been given of the case where the joining surface of the beam 2 in the column 1 and the end 15 of the column main reinforcing bars 11, 11,...
Also, the ends 15, 16 of the beam main reinforcing bar 12 can be joined.

[0029]

As described above, according to the present invention,
Since the end of the beam main reinforcement and the end of the column main reinforcement are joined by a joining member, there is no need to bend the ends of the column main reinforcement and the beam main reinforcement in order to fix each main reinforcement, as in the related art. . Accordingly, since the reinforcing bars at the beam-column joints are simplified, even when the columns are precast or when the columns are driven in front, the reinforcing bar work of the beams is facilitated.

Further, since the joining member has a plate-like portion substantially orthogonal to each main reinforcing bar, not only the pulling direction of each main reinforcing bar but also the anchoring force in a direction intersecting with the main reinforcing bar becomes large, and each main reinforcing bar at the time of an earthquake becomes large. Even when a radial force is applied to the concrete, it is possible to prevent the main rebar from expanding and breaking the concrete.

Further, since it is not necessary to provide a projection for fixing the main reinforcing bar of the pillar as in the conventional case, it is easy to attach a waterproof sheet on the roof, and it is possible to reliably perform waterproofing. Will be possible.

When the column main reinforcing bar arranged on the outer side opposite to the beam joint surface of the column and the beam main reinforcing bar arranged on the upper side of the beam are joined, Since each of the main rebars inside the main rebar is restrained, it is possible to prevent these main rebars from protruding outward.

Further, when the adjacent beam main reinforcing bars are restrained by the U-shaped restraining bars, it is possible to prevent the beam main reinforcing bars from protruding outward.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a method of joining an end of a column and a beam according to the present invention.

FIG. 2 is a perspective view showing a joining member according to the present invention.

FIG. 3 is a view showing a plate for fixing each main reinforcing bar according to the present invention.

FIG. 4 is a view taken in the direction of arrow A in FIG. 1;

FIG. 5 is a view showing a car reinforcing bar according to the present invention.

FIG. 6 is a plan view showing another embodiment of the method for joining the ends of a pillar and a beam according to the present invention.

FIG. 7 is a view showing another embodiment of the joining member according to the present invention.

[Explanation of symbols]

 1,25 pillar 2,27 beam 11,26 pillar main reinforcing bar 12,28 beam main reinforcing bar 17,31 joining member 18,19,29,30 plate portion

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomoyuki Watanabe 2-10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. Construction Industry Co., Ltd. (72) Inventor Koji Aota 2--10-2, Fujimi 2-chome, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. (72) Inventor Toshiyuki Morimoto 2-2-1 Nishihonmachi, Nishi-ku, Osaka The formula company Zenitaka Gumi

Claims (5)

[Claims] 1. A joining method for joining ends of a column and a beam of a reinforced concrete building, wherein an end of a column main reinforcing bar of the column and an end of a beam main reinforcing bar of the beam are connected to the column main reinforcing bar. Ends of the column and the beam, wherein the column and the beam are joined by a joining member having a substantially orthogonal plate-like portion and a plate-like portion substantially orthogonal to the beam main reinforcing bar, and the joining member is embedded in the concrete of the column. Part joining method. 2. The joining member comprising: a column main reinforcing bar provided on an outer surface of the column opposite to a surface to which the beam is to be bonded; and a beam main reinforcing bar provided on an upper surface of the beam. The method according to claim 1, wherein the joining is performed by using a column. 3. An end joint between a column and a beam according to claim 1, wherein ends of the column main reinforcing bar and the beam main reinforcing bar are fixed to the plate-like portions, each of which is substantially orthogonal to each other. Method. 4. When the beam main reinforcement is substantially orthogonal to the arrangement direction of the column main reinforcements to be joined by the joining member, a cross section of the ends of the column main reinforcement and the beam main reinforcement is L. The joint is formed by the joint member having a U-shape.
4. The method for joining ends of columns and beams according to any one of items 1 to 3. 5. The method according to claim 1, wherein adjacent beam main reinforcing bars are restrained by U-shaped restraining bars.