JPH10299137A - Vibration control wall structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide effective aseismatic performance by arranging a wall body made of reinforced concrete between two beams positioned above and below, cutting the edge of a concrete part of the wall body from the beams, and cutting the edge of a reinforcement in a prescribed length in upper and lower end parts. SOLUTION: Upper and lower end parts of a concrete part 6 of a wall 3 made of reinforced concrete, are housed in recessed parts 13 arranged in upper and lower beams 1, and upper and lower end parts of respective vertical reinforcements 8 are integrally installed in the beams 1. Edge cutting materials 14 such as a styloform having a prescribed thickness are arranged on inner surfaces of the respective recessed parts of the beams 1, and the beams 1 and the concrete part 6 of the wall 3 are constituted so that the edge is cut. Next, when horizontal external force is inputted by an earthquake or the like, the upper and lower beams 1 are relatively displaced in the horizontal direction in the respective floors, and the wall 3 arranged between the upper and lower beams 1 is cut at the edge from the beams 1 by the edge cutting materials 14, and the concrete part 6 rotates. Next, since the vertical reinforcements 8 are cut at the edge from the concrete part 6 by edge cutting materials 11, tensile force concentratingly acts on the vertical reinforcements 8 by rotation of the concrete part 6. Therefore, a vibration control effect can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damping wall structure suitable for use in, for example, an apartment house or a school building.

[0002]

2. Description of the Related Art In recent years, it is well known that high seismic resistance is desired for buildings such as buildings, apartment buildings, school buildings, and the like. Various vibration structures have been developed.

[0003]

However, all of the above-mentioned conventional techniques have a problem that the cost is high, and the development of a technique capable of obtaining effective earthquake resistance at low cost is underway. .

[0004] In buildings constructed of reinforced concrete or the like, such as low- and middle-rise apartment buildings, doors and windows are installed along walls or walls that separate rooms in each dwelling unit, along balconies and passageways. There is a wall with an opening. These walls are called miscellaneous walls, and usually do not particularly have a function as an earthquake-resistant element. 1995 (1995)
In the Hyogo-ken Nanbu Earthquake, such miscellaneous walls were destroyed by the relative displacement of the upper and lower beams due to seismic force, the doors could not be opened, and the damaged walls were very difficult to repair after the disaster Met.

[0005] In addition, a building in which a plurality of dwelling units and classrooms are arranged along a passage or a corridor, such as an apartment house or a school building, is viewed from the direction along the passage or the corridor (girder direction) in plan view. The length in the direction perpendicular to the direction (inter-beam direction) is short, and the rigidity in the inter-beam direction is lower than that in the row direction. In such a building, an improvement in seismic resistance particularly against vibration in the direction between beams is being pursued.

The present invention has been made in consideration of the above points, and has as its object to provide a vibration-damping wall structure which can be manufactured at low cost and with effective seismic performance.

[0007]

The invention according to claim 1 is
A reinforced concrete wall body is provided between the two beams located above and below, and a concrete part forming the wall body is cut off from the beam, and the wall body is formed and its end is formed on the upper and lower beams. It is characterized in that the fixed reinforcing bars are cut off over a predetermined length at the upper and lower ends of the concrete portion of the wall.

According to a second aspect of the present invention, in the vibration damping wall structure according to the first aspect, between the concrete portion and the beam of the trimmed wall body and between the concrete portion and the reinforcing bar. , Each of which is provided with an edge cutting member.

The invention according to claim 3 is the invention according to claim 1 or 2
In the above described vibration damping wall structure, the wall is a rough wall.

[0010] The invention according to claim 4 is the invention according to claims 1 to 3.
In the damping wall structure according to any one of the above,
At least a part of the wall body cut off from the concrete part is formed of a low-yield-point steel material.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vibration damping wall structure according to the present invention will be described below with reference to FIGS.

FIG. 1 shows, for example, a part of a frame of an apartment house, and illustrates beams and walls provided at a portion separating rooms in each dwelling unit. In this figure, reference numeral 1 is
Beams erected on each floor, 2 is a slab, 3 is a wall (wall, miscellaneous wall), and 4 is an opening for forming a door or the like.

As shown in FIG. 1, the wall 3 is made of a reinforced concrete structure and includes a concrete portion 6 and a mesh bar 7. The mesh bars 7 are longitudinal bars (rebars) 8,
, And the horizontal streaks 9, 9, ... are assembled in a mesh shape, and the upper and lower ends of the vertical streaks 8, 8, ... are concrete portions 6
Are arranged so as to protrude up and down by a predetermined length.

In the upper and lower ends of the concrete portion 6, holes 10 having a predetermined size and a larger diameter than the vertical streaks 8 and a predetermined depth are formed at positions corresponding to the respective vertical streaks 8,
A vertical streak 8 is inserted through the hole 10. In the hole 10, the outer peripheral surface of the vertical streak 8 is a trimming material 1 such as styrofoam (product name of extruded expanded polystyrene: manufactured by Dow Chemical).
1 is wound around, so that the vertical streaks 8
And the concrete part 6 are cut off.

The wall 3 has a concave portion 1 in which the upper and lower ends of the concrete portion 6 are formed in upper and lower beams 1, 1, respectively.
3 and 13, and the upper and lower ends of each vertical streak 8 are beams 1 and
1 and integrated. On the inner peripheral surface of each recess 13, a trimming member 14 having a predetermined thickness, such as a styrofoam, is disposed, and thereby, the beam 1 is formed.
And the concrete portion 6 of the wall 3 are cut off.

When a horizontal external force is input due to an earthquake or the like in the skeleton of an apartment house provided with the wall 3, as shown in FIG. 2, the upper and lower beams 1, 1 are relatively displaced horizontally in each floor. Then, since the wall 3 provided between the upper and lower beams 1 and 1 is cut off from the beams 1 and 1 by the edge cutting member 14, the concrete portion 6 is rocked and rotated. And, at the upper and lower end portions of the wall 3, the vertical streaks 8 are cut off from the concrete portion 6 by the trimming material 11.
, The tensile force acts in a concentrated manner. Due to this tensile force, the vertical streaks 8 yield and function as hysteresis dampers such as so-called steel dampers to absorb energy. As a result, the rotational displacement of the concrete portion 6 and the relative displacement of the upper and lower beams 1, 1 are attenuated, and a vibration damping effect is obtained. Moreover, at this time, since the upper and lower edge cutting members 14 of the concrete portion 6 of the wall 3 are made of a styrofoam or the like having a predetermined thickness, the concrete portion 6 only rotates rigidly and does not hit the upper and lower beams 1,1.

In the above-described damping wall structure, the concrete portion 6 of the wall 3 is cut off from the beams 1 and 1 by the cutting material 14, and the vertical streaks 8 are cut off by the cutting material 11 at the upper and lower ends of the concrete portion 6. It is the configuration that was done. Accordingly, when the upper and lower beams 1 and 1 are relatively displaced due to an earthquake or the like, the concrete portion 6 of the wall 3 cut off from these beams 1 and 1 is rotationally displaced, and the displacement energy is transferred to the vertical streaks 8. Is absorbed by yielding at a portion cut off from the concrete portion 6, and functions as a hysteresis damper to exhibit a vibration damping effect. Moreover, at this time, since the concrete portion 6 only rotates rigidly, it is possible to prevent the concrete portion 6 from suffering damage such as cracking or breakage. In this manner, the wall 3, which is a so-called rough wall, can be provided with a vibration damping function without installing a special seismic isolation device, a member, or the like, and performing construction with almost the same work as usual. Therefore, it is possible to obtain a vibration damping effect at low cost and without taking up installation space.

A wall 3 extending in the direction between the beams of the apartment house
By applying the above-mentioned damping wall structure to, especially in a multi-unit rectangular housing in which the dimension in the beam direction is smaller than the dimension in the girder direction, the seismic resistance in the beam direction is improved,
It is possible to efficiently improve the earthquake resistance of the entire apartment house.

In the above embodiment, the position of the wall 3 is not limited at all. For example, the wall 3 may be used for a passage in an apartment house or a wall extending along a balcony. The planar shape of the wall 3 may be, for example, L-shaped depending on the place where the wall 3 is installed. And the wall 3 itself may be formed of cast-in-place concrete or may be made of precast concrete. Also, the material of the edge-cutting members 11 and 14 is not limited at all, and since the longitudinal streaks 8 and the concrete portion 6, the concrete portion 6 and the beam 1 are edged, and the concrete portion 6 can be rigidly rotated. If so, other materials may be used as appropriate,
It is good also as composition which abolished 1,14.

Further, the building to which the wall 3 is applied is not limited to the above-mentioned apartment house, but may be another building such as a school building or a building.

In addition, the vertical streaks 8 may be configured, for example, such that at least a portion cut off from the concrete portion 6 by the trimming member 11 is formed of a low yield point steel material or the like. With such a configuration, the portion formed by the low-yield-point steel material can be positively yielded in advance, thereby exhibiting a vibration damping effect even for smaller vibrations such as wind. It becomes possible.

In addition to the above, other configurations can be adopted as long as they do not depart from the gist of the vibration damping wall structure according to the present invention.

[0023]

As described above, claims 1, 2, 3
According to the vibration damping wall structure according to the above, the concrete portion forming the wall body such as a miscellaneous wall is cut off from the beam by the trimming material, and the reinforcing bar forming the wall body is determined at the upper and lower ends of the concrete portion by the trimming material. It has a configuration that is cut off over a long period. Thereby, when the upper and lower beams are relatively displaced due to an earthquake or the like, the concrete portion of the wall cut off from these beams is rotationally displaced, and the reinforcing bar of the wall yields at the portion cut off from the concrete portion. Thereby, the vibration energy can be absorbed and the vibration damping effect can be exhibited. In addition, at this time, since the concrete portion only rotates rigidly, it is possible to prevent the concrete portion from being damaged such as cracking or breakage. In this way,
Without installing special seismic isolation devices and members, and with almost the same work as usual, it has a vibration damping function on miscellaneous walls, etc., which did not have any function as a seismic member in the past Can be made. Therefore, it is possible to obtain a vibration damping effect at low cost and without taking up installation space.

Further, according to the vibration damping wall structure of the fourth aspect, at least a portion of the reinforcing bar cut off from the concrete portion of the wall is formed of a low yield point steel material. As a result, this part can be positively yielded in advance, and it is possible to exert a vibration damping effect even for smaller vibrations such as wind.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view and a side sectional view showing an example of a vibration damping wall structure according to the present invention.

FIG. 2 is an elevational sectional view showing a state where the wall shown in FIG. 1 is displaced by an earthquake.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Beam 3 Wall (wall, miscellaneous wall) 6 Concrete part 8 Vertical bar (rebar) 11,14 Edge cutting material

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI E04B 2/56 632 E04B 2/56 632G 632W 632Y E04H 9/02 321 E04H 9/02 321E

Claims (4)

[Claims] 1. A reinforced concrete wall is provided between two beams located above and below, and a concrete part constituting the wall is cut off from the beam, and the wall is formed and an end thereof is formed. A damping wall structure, wherein rebars fixed to the upper and lower beams, respectively, are cut off over a predetermined length at upper and lower ends of a concrete portion of the wall. 2. The damping wall structure according to claim 1, wherein a portion between the concrete portion of the cut wall and the beam is provided.
A damping wall structure, wherein an edge-cutting material is interposed between the concrete portion and the rebar. 3. The damping wall structure according to claim 1, wherein said wall is a miscellaneous wall. 4. The damping wall structure according to claim 1, wherein at least a portion of said reinforcing bar cut off from a concrete portion of said wall body is formed of a low yield point steel material. Characterized by a damping wall structure.