JPH0643108U - Seismic wall structure - Google Patents

Abstract

(57) [Summary] [Purpose] The beam type inside the reinforced concrete seismic wall was abolished,
Provide a seismic wall structure with excellent workability in which beam reinforcement is performed inside a slab. [Structure] In a multi-story earthquake-resistant wall without a beam type, the longitudinal wall of the wall is discontinuous at the intersection of the precast concrete wall plate 1 having the cotters 2 at the upper and lower ends and the concrete slab 3, and a plurality of wall streaks are provided near the intersection. The beam main bar 5 of No. 2 was reinforced inside the slab 3, and the stirrup bar was omitted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a seismic wall structure.

[0002]

[Prior art]

 In the past, it has been considered desirable to design the frame consisting of columns and beams around the seismic wall as rigid as possible. In particular, for earthquake-resistant walls where the wall plates undergo shear failure, the minimum value has been set for the frame cross-section so as not to cause a sudden decrease in yield strength, as shown in the RC Standards of the Japan Institute of Architecture.

On the other hand, in the RC laminated method (precast seismic wall) of the applicant, based on the results of a series of conventional researches, the implementation and design of the seismic wall of the type in which the beam type of the frame has already been omitted has been developed. . However, the beam reinforcement such as the main beam and stirrup will be reinforced as usual. 5 and 6 show a conventional cast-in-place concrete earthquake-resistant wall structure, where a is the earthquake-resistant wall, b is a pillar, and c is a large beam.

FIGS. 7 and 8 show a conventional beam-shaped precast concrete earthquake-resistant wall structure, where c is a beam, d is a precast concrete earthquake-resistant wall, e is a beam bottom end bar, f is a beam stirrup, and g is an on-site arrangement. The upper beam of the beam, s, is a slab. Fig. 9 shows a conventional cast-in-place concrete seismic wall structure without a beam type, where a is the seismic resistant wall, e is the beam bottom end bar, f is a beam stirrup, g is a beam top bar, and s is a slab.

[0005]

[Problems to be solved by the device]

 In the conventional cast-in-place concrete wall, as shown in FIG. 6, the beam type c protrudes into the room to limit the indoor plan, and the wall reinforcement and the beam type reinforcement are complicated, which makes the reinforcement work difficult. To do. Furthermore, in the case of the above-mentioned precast concrete wall, the method of constructing the orthogonal beam is restricted due to the lower end bar of the beam inside the wall.

The present invention has been proposed in view of the above problems of the prior art. The purpose of the present invention is to save labor in the work of arranging and forming, and to improve the degree of freedom in designing the room space. The point is to provide a seismic wall structure.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the earthquake-resistant wall structure according to the present invention is a multi-story earthquake-resistant wall without a beam type, in which the longitudinal wall of the wall is not formed at the intersection of the precast concrete wall board with cotter at the upper and lower ends and the concrete slab. In addition to being continuous, a plurality of beam main reinforcements are arranged in the slab in the vicinity of the intersection, and the stirrup reinforcement is omitted.

According to a second aspect of the present invention, in a multi-story earthquake-resistant wall without a beam type, at the intersection of the cast-in-place concrete wall plate and the concrete slab, only the beam main bar is arranged inside the slab at the outer position of the wall vertical bar. Is configured.

[0009]

[Action]

 According to the present invention, as described above, at the intersection of the precast concrete wall plate having no cotter and the upper and lower cotters and the concrete slab, the longitudinal wall of the wall is not connected and the vicinity of the intersection is provided. By arranging multiple beam main reinforcements in the slab, the reinforcement work is simplified, and many rebars are not disposed in the wall at the intersection, so a sudden decrease in yield strength when an external force is applied. The seismic wall with high toughness can be obtained.

According to the second aspect of the present invention, only a plurality of beam main bars are arranged inside the slab outside the longitudinal wall of the wall at the intersection of the slab and the cast-in-place concrete wall having no beam shape. Since it is not installed, the reinforcing work is simplified and a tough earthquake resistant wall is obtained in the same manner as above.

[0011]

【Example】

 The present invention will be described below with reference to the illustrated embodiments. Reference numeral 1 is a precast concrete wall board having cotters 2 at the upper and lower ends, and the longitudinal wall 4 of the wall is discontinuous at the intersection of the wall board 1 and the concrete slab 3 cast in situ. The beam main bars 7 are arranged in the slab 3, and the slab 3 is constructed by post-casting concrete placing as shown by the dotted line in FIG.

According to the illustrated embodiment, since a large number of reinforcing bars are not arranged in the wall at the intersection of the concrete wall and the slab, a sharp toughness does not occur when an external force is applied, and a highly tough earthquake-resistant wall is constructed. To be done. FIG. 4 shows an embodiment in which the present invention is applied to a cast-in-place concrete earthquake-proof wall. Only a plurality of beam main bars 7 are provided outside the wall reinforcement 6 in the cast-in-place concrete wall plate 1'without stirrup. Is reinforced in the concrete slab 3.

In the figure, 8 is a pillar, and 9 is a pillar main bar.

[0014]

[Effect of device]

 In the present invention, as described above, since the beam main bar is arranged at the slab position and the stirrup is omitted at the intersection between the wall plate without the beam shape and the cast-in-place concrete slab, labor saving of the bar arrangement work is achieved. It is possible to reduce the construction cost. In addition, the beam reinforcement is concentrated on the slab surface, which simplifies the reinforcement work.

Further, according to the present invention, since the beam type does not appear in the room, the mold can be simplified and the degree of freedom in designing the room space is increased.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a seismic wall structure according to the present invention.

FIG. 2 is a front view showing a joint portion between upper and lower precast concrete wall plates, and is an arrow view of FIG.

3 is a perspective view taken along the arrow in FIG.

FIG. 4 is a vertical cross-sectional view showing a joint portion of a cast-in-place concrete earthquake resistant wall.

FIG. 5 is a front view of a conventional cast-in-place concrete seismic wall.

6 is a vertical sectional side view of FIG.

FIG. 7 is a front view of a conventional precast concrete earthquake-resistant wall.

8 is a vertical side view of FIG.

FIG. 9 is a vertical cross-sectional side view of a conventional cast-in-place concrete earthquake resistant wall having a beam-type reinforcement.

[Explanation of symbols]

 1 Precast concrete wallboard 1 ′ Cast-in-place concrete wallboard 2 Cotter 3 Concrete slab 4 Wall longitudinal bar 5 Beam main bar 6 Wall bar 7 Beam main bar 8 Column 9 Column bar

Claims (2)

[Scope of utility model registration request] 1. In a multi-story earthquake-resistant wall without a beam type, the longitudinal wall of the wall is discontinuous at the intersection of the precast concrete wall plate having cotters at the upper and lower ends and the concrete slab, and a plurality of walls are provided near the intersection. The main structure of the beam is arranged in the slab, and the reinforcement of the stirrup is omitted. 2. In a multi-story earthquake-resistant wall without a beam type, at the intersection of a cast-in-place concrete wall plate and a concrete slab, only the beam main bar is arranged inside the slab outside the vertical wall of the wall. Earthquake resistant wall structure.