JP2525537Y2 - Joint structure of precast reinforced concrete shear walls - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a joint structure of a precast reinforced concrete shear wall, and more specifically, a joint of a precast reinforced concrete shear wall in which joint bars are concentrated and arranged in a slab. It is about structure.

[Conventional technology]

The tough design is applied to the multi-story shear walls used for medium- and high-rise buildings with bending yield. Therefore, when a precast reinforced concrete shear wall (hereinafter referred to as a precast shear wall) is used as the earthquake-resistant wall, it is necessary to arrange a connecting bar at a vertical joint between the precast earthquake-resistant wall and the column. Conventionally, the reinforcing bars are provided so as to protrude in advance on both end surfaces of the precast earthquake-resistant wall. However, the reinforcing bars are obstacles when the hoop bars of the columns are incorporated. As an alternative to this, a method of arranging joint bars concentrated in a slab has been used.

[Problems to be solved by the invention]

However, in the case of the concentrated reinforcing bars in such slabs, it is necessary to arrange the reinforcing bars over the span between the columns, so that the reinforcing bars are lengthened. Also, from the structural design, the reinforcing bars are provided on the side end faces of the precast shear walls. Since the diameter of the reinforcing bar was larger than that of the reinforced joint, the weight of the reinforcing bar was increased. Therefore, there has been a problem that it is not easy to arrange the reinforcing bars such as transporting and installing the connecting bars.

In addition, the joint bar disposed at the slab position yields only at the end, and does not bear much stress at the center of the span. Therefore, there is a problem that the joint bar at the center of the span, which is disposed in the same amount as the end, is not used effectively and is wasted.

The present invention has been made in order to solve such a problem, limiting the arrangement position of the joint bars in the slab, simplifying the arrangement by suppressing the length and weight of the reinforcing bars,
It is an object of the present invention to obtain a joint structure of a precast earthquake-resistant wall that can reduce use of rebar material by eliminating useless rebar.

[Means for solving the problem]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned object, and the gist of the present invention is to provide a slab for reinforcing a column, a precast reinforced concrete shear wall to be joined to the column, and a joint between the column and the precast reinforced concrete shear wall. In a joint structure having joint bars concentratedly arranged therein, the joint bars are not arranged at the center of the span of the slab, but are concentratedly arranged only in the slab adjacent to the column and the column. In the joint structure of the precast reinforced concrete shear walls.

〔Example〕

 Embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a precast reinforced concrete shear wall 10 (hereinafter referred to as a “precast shear wall”) is used for a ramen structure 1 composed of columns 2 and beams 3.
It is connected across the columns 2,2. The ramen structure 1 is continuous, and the precast earthquake-resistant wall 10 is provided continuously on each floor and shares a part of horizontal load stress applied to the ramen structure 1 such as seismic force.

The precast earthquake-resistant wall 10 is a reinforced concrete product prepared in advance by a bending yielding type toughness design, and is used when assembling the formwork of the cast-in-place reinforced concrete columns 2, beams 3 and slabs 4 and their reinforcing bars 2a, 3a and 4a. At a predetermined position.

The joint between the precast earthquake-resistant wall 10 and the column 2 is reinforced by joint bars 11. The joint bar 11 yields due to bending stress when the rigid frame structure 1 receives an excessive load. The joint bars 11 are concentrated in the slab 4 above the precast shear wall 10 as shown in FIGS.
Are disposed only at both ends of the span, for example, between the slab reinforcing bars 4a, 4a arranged in the upper and lower stages. This configuration,
A structure in which joint bars 12 are embedded in both end surfaces of the precast earthquake-resistant wall 10 shown in FIG. 4 (a), and a joint bar shown in FIG. 4 (b)
This is different from the configuration in which the reinforcing bars 13 are arranged in the slab 4 of the precast shear wall 10 over the entire span. In addition, the diameter of the reinforcing bar of the joint bar 11 of the joint structure of the present invention is generally 16 mm or more, and is larger than the diameter (generally, 10 mm or 13 mm) of the joint bar 12 on both side end faces shown in FIG. 4 (a). Further, only the joints 13 in FIG. 4 (b) yield at both ends, and no stress is applied to the center of the span. Therefore, only the joint bars 11 arranged at both ends of the present invention can function as a reinforcing bar for reinforcing the vertical joint between the column 2 and the precast shear wall 10.

The reinforcing bars 11 are concentrated and arranged at both ends of the span as described above, and concrete is poured into the columns 2, beams 3 and slabs 4 where the reinforcing bars 2a, 3a, 4a and the formwork have been assembled, and the precast earthquake-resistant wall is provided.
10 and the ramen structure 1 are integrated.

5 (a) to 5 (f) show an embodiment of the structure of the present invention, and show an anchoring form of the joint bar 11 on the column 2 of the ramen structure 1. FIG. FIGS. 5 (a) to 5 (d) show a form of fixing to the side pillars. FIG. 5 (a) shows an L-type fixing, and FIG. 5 (b) shows a U-type fixing. In the case of U-shaped fixing, as shown in FIG.
The hoop-shaped fixing can be performed by closing the end opposite to the U-shaped portion. Further, as shown in FIG.
If the reinforcement is arranged so as to surround the main reinforcement 2a 'of the column 2, the concrete in the U-shaped portion is restrained.
Toughness increases. FIGS. 5 (e) and 5 (f) show a fixing manner to the center pillar 2 ', and include a rod-shaped fixing shown in FIG. 5 (e) and a rectangular hoop-shaped fixing shown in FIG. 5 (f). Can be

6 (a) to 6 (c) show another embodiment of the present invention in which the joint structure of the precast earthquake-resistant wall 10 is used for a wall-type rigid frame structure. 6 (a) and 6 (b) show the form of fixation to the side pillar 2 ", showing an L-shaped fixation and a rectangular hoop-shaped fixation, respectively. And other examples include rectangular hoop fixing.

[Effect of the invention]

The joint structure of the precast reinforced concrete shear wall of the present invention concentrates the reinforcement only on the slab and the column close to the column, so the length and weight of the reinforcement can be reduced and the reinforcement work can be performed. Can be easily performed, and the rebar material can be saved.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a laminated structure of a ramen structure,
FIG. 2 is a partially broken enlarged perspective view showing a joint structure of the precast reinforced concrete shear wall of the present invention, FIG. 3 is a schematic cross-sectional view taken along the line III-III of FIG. 2, and FIG. ,
(B) is a schematic cross-sectional view showing a conventional joint structure, and FIGS. 5 (a) to (f) are explanatory views showing a fixing form of a joint streak to a column having a rigid frame structure, and FIGS. (C) is an explanatory view showing an anchoring form of the joint streaks on the wall-type rigid frame structure. 2 ... pillars, 3 ... beams, 4 ... slabs, 10 ... precast reinforced concrete shear walls, 11 ... joints.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location E04H 9/02 321 E04H 9/02 321E

Claims (1)

(57) [Scope of request for utility model registration] 1. A pillar, a precast reinforced concrete shear wall to be joined to the pillar, and a joint reinforcement concentrated in a slab to reinforce a joint between the pillar and the precast reinforced concrete shear wall. The joint structure of a precast reinforced concrete shear wall, wherein the reinforcing bars are not arranged at the center of the span of the slab, but are concentrated only on the slab adjacent to the column and the column. .