JP2622013B2 - Reinforced concrete shear wall structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a reinforced concrete shear wall structure.

(Conventional technology) In a frame-type precast structure in which main structural members such as columns, beams, and earthquake-resistant walls produced at a factory are assembled on site, the entire structure is integrated with grout or cast-in-place concrete after construction. These precast members have various shapes according to the frame plan and the construction method, and as shown in FIG. 6, the precast concrete columns (a),
The most common type is a type in which the precast concrete earthquake-resistant wall (b) and the parts of each structure are separated, and a joint is provided at a boundary position of each member.

(Problems to be Solved by the Invention) However, when the earthquake-resistant wall having a relatively large span is made of one wall plate, the weight and dimensions become too large, which may hinder transportation and lifting.

Further, when only the wall plate is subdivided into a plurality of parts, the number of members constituting the earthquake-resistant wall increases, and the number of times of lifting and adjustment of the building increases accordingly, which also affects the construction period.

The present invention has been proposed in view of such problems, and the object thereof is to reduce the number of precast members, improve workability, have structural reliability, and shorten the construction period. In providing a reinforced concrete shear-resistant wall structure.

(Means for Solving the Problems) In order to achieve the above object, the reinforced concrete earthquake-resistant wall structure according to the present invention incorporates a horizontal reinforcing bar densely arranged on a wall leg alongside a wall reinforcing bar and a beam lower reinforcing bar. And a pair of split precast concrete wall plates having pillars having end faces that join the wall portions together, connecting the lower end bars and the horizontal reinforcing bars of the beams and protruding above the respective wall plates. The upper end of the beam is arranged on the wall reinforcing bar, the slab concrete on the wall plate is poured, and the joint between the opposite wall plates is filled with grout material (or cast-in-place concrete). ing.

(Operation) According to the present invention, as described above, the earthquake-resistant wall is constituted by the two divided precast concrete wall plates with columns, so that one pair of the precast concrete columns and the precast concrete earthquake-resistant wall plate are used. The number of members is reduced to 2/3 as compared with the constructed conventional earthquake-resistant wall structure. Further, in the joint portion of the two adjacent earthquake-resistant wall plates, a beam lower reinforcement built in each of the wall plates and a horizontal reinforcing bar densely arranged on the wall leg portion are joined, and a joint is provided at the joint end surface. By filling the grout material in the joint between the two wall plates, the precast concrete wall plates with the two columns are integrally connected, and the transmission of the stress between the wall plates is reliably performed.

The slab and the aseismic wallboard are integrated by arranging the upper end of the beam on the wall reinforcement projecting above the wallboard and pouring the slab concrete on the upper part of the wallboard.

(Example) Hereinafter, the present invention will be described with reference to an illustrated example.

(A) is a precast concrete wall plate with a pillar divided into at least two parts, which are densely arranged on the wall leg portion along with the wall reinforcing bar (2) and the beam bottom reinforcing bar (3) on the wall plate portion (1). A horizontal reinforcing bar (4) is built in, and cotters (5) and (6) are provided on a vertical mating surface and a horizontal joining surface, respectively.

In the figure, (7) is a column in the precast concrete wall plate with column (A).

Thus, one pair of the precast concrete wall plates (A) with columns are opposed to each other, and the wall plate portion (1) in each of the wall plates (A) is provided.
The projecting ends of the lower beam reinforcing bar (3) and the horizontal reinforcing bar (4) incorporated in the wall plate are joined by enclosed welding (w) or the like, and the wall protruding from the upper end of each of the wall plate portions (1). A beam top bar (8) is arranged on a reinforcing bar (2) or a rib bar, and a slab concrete on an upper portion of a wall plate is cast, and a slab (B) and each of the precast concrete wall plates with columns (A) are connected. At the same time, a grout material (9) is filled in a joint between the two wall plate parts (1) and (1), and the two-part precast concrete plates (A) and (A) are integrally joined. .

According to the above-described embodiment, the number of members constituting the earthquake-resistant wall is reduced to 2/3 as compared with the conventional structure in which the pillar and the wall plate are each formed of an independent precast member, and the lift and the construction are correspondingly reduced. The number of adjustments is also reduced, and simplification and speeding up of construction can be achieved.

Adjacent wall plates are connected to the protruding ends of the built-in lower end bar (3) and the horizontal bar (4), respectively, and the adjacent wall plate (A) has a wall directly joined to the wall. A cotter (5) is provided on the plate portion (1), and a grout material (9) is provided.
Is filled, the two wall plates (A) are integrally joined, and the transmission of stress is reliably performed.

It is to be noted that cast-in-place concrete may be poured into the vertical joint portion together with the concrete of the slab (B).

FIG. 3 and FIG. 4 show another embodiment of the present invention. In the case where the width of the vertical joint portion of the adjacent wall plates (A) becomes larger than a certain extent, the gap between the two wall plates (A) is increased. A wall reinforcement (10) for preventing cracks is arranged with a minimum reinforcement amount.

In the figure, the same reference numerals are given to the same parts as those in the above embodiment.

FIG. 5 shows another embodiment of the present invention, in which a column-reinforcing cage (11) is inserted between the adjacent wall plates (A).

In the figure, the same reference numerals are given to the same parts as those in the above-mentioned embodiments.

(Effects of the Invention) According to the present invention, as described above, a twin with a built-in horizontal reinforcing bar densely arranged on a wall leg alongside a wall reinforcing bar and a lower end bar of a beam, and having a cotter on an end face joined to a wall. By splitting the precast concrete wall plate with pillars divided into two, connecting the lower reinforcement of the beam of the same wall plate and the horizontal reinforcing bar of the wall leg, and filling the joint of both wall plates with grout material The two wall plates are integrally connected to each other so that the stress can be transmitted reliably. At this time, the horizontal reinforcing bars of the wall leg portions are densely built in, the respective horizontal reinforcing bars of the wall leg portions of the opposing wall plates are joined, and the joint between the two wall plates is filled with the grout material. The two wall plates are more reliably joined. In addition, the slab and the wall plate are integrated by arranging slab concrete by arranging the upper end of the beam on the wall reinforcement protruding from the upper part of each wall plate, thereby providing a structurally reliable earthquake-resistant wall. The structure is configured.

Furthermore, according to the present invention, by dividing the earthquake-resistant wall into two pairs of precast concrete wall plates with columns, the number of precast members is reduced as compared with the conventional structure,
The number of times of lifting and adjustment of the construction is reduced, the construction can be simplified, and the construction period can be shortened.

The invention according to claim 2 is to dispose wall reinforcement in the joint portion of the two wall plates and cast concrete to prevent the occurrence of cracks when the width of the joint portion becomes larger than a certain extent. is there.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a reinforced concrete shear wall structure according to the present invention, FIG. 2 is a longitudinal side view thereof, FIG. 3 is a front view showing another embodiment of the present invention, and FIG. FIG. 5 is a cross-sectional plan view showing a wall plate joint, FIG. 5 is a cross-sectional plan view showing a wall plate joint of still another embodiment of the present invention, and FIG. 6 is a front view showing a conventional structure. (A) ... Precast concrete wall plate with pillars, (1) ... wall plate portion, (2) ... wall reinforcement, (3) ... beam bottom reinforcement, (4) ... horizontal reinforcement, (5) … Cotter, (7)… pillar, (8)… top beam reinforcement, (9)… grout material.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location E04B 2/56 611 E04B 2/56 611D 621 621R 621A 621S 633 633A 633G 632G 642 642A E04H 9/02 321E04H 9/02 321B (72) Inventor Yutaka Hayashi Taisei Construction Co., Ltd. 1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo (72) Inventor Yukio Abe 1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei Within Construction Co., Ltd. (72) Inventor Junichi Fukushima 1-25-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (56) References JP-A-2-140339 (JP, A) 34417 (JP, B2) Japanese Patent Publication No. 51-46962 (JP, B2) "Architectural Engineering Construction", January 1987, pp. 154 to 155 (Showa 6) (Published by Shokoku Company on January 1, 2002)

Claims (2)

(57) [Claims] 1. A pair of split column-mounted precasts having a built-in horizontal reinforcing bar densely arranged on a wall leg along with a wall reinforcing bar and a lower end bar of a beam, and having a cotter on an end face to be joined to a wall. While connecting the beam lower reinforcement and the horizontal reinforcement in the concrete wall plate, arranging the beam upper reinforcement on the wall reinforcement protruding above the respective wall plate, placing the slab concrete on the upper part of the wall plate, A reinforced concrete earthquake-resistant wall structure, characterized in that a grout material is filled in a joint between the opposed wall plates. 2. The reinforced concrete earthquake-resistant wall structure according to claim 1, wherein a wall reinforcement is provided in a joint portion between the two wall plates and concrete is cast.