earthquake-resistant wall structure

Abstract

To provide a seismic isolation wall structure of a lightweight wall construction capable of avoiding damage to plastering walls and paintings on that surface while avoiding an external force such as strain from being directly applied.SOLUTION: The seismic isolation wall structure is a double wall with a lightweight wall on the indoor side of the building of an existing wall surface, in which the light wall is connected to the existing wall surface with an anti-vibration device. Multiple anti-vibration devices are arranged in a matrix with respect to each of the existing wall surfaces and the lightweight wall.SELECTED DRAWING: Figure 6

Description

Technical Field

[0003]

[0001] The present invention relates to a seismic isolation wall structure that prevents strain from being transmitted to the wall surface even when the main body is deformed and strained by an external force such as an earthquake.

Background Art

[0002] Conventional lightweight walls are generally finished with plastering or the like on the surface of a board or the like. In this case, usually, the lightweight wall is connected to the structural main body through a lightweight steel frame at the base, so it may be damaged due to interlayer deformation caused by an external force such as an earthquake. In the case of ordinary plastering such as lime plaster, since it is a finish that does not follow deformation such as strain, damage occurs to the finishing material. And depending on the type of the finishing material, it may not be possible to easily repair or rework the damaged part. Particularly, damage in the case where a delicate drawing such as a flask painting is applied as a finish causes a great deal of damage.

[0003] That is, as shown in FIG. 7, the conventional lightweight wall 20 is constrained between the upper and lower beams 21, 22 and the columns 23, 24 on both sides. Therefore, when a sudden horizontal force such as the S-wave of an earthquake is applied, it cannot follow this force, and there is a problem that the lightweight wall itself is partially destroyed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Patent Document 1 describes the structure of a wall having a seismic isolation structure. However, in this invention, the wall uses steel coil springs as seismic isolation materials, and the wall is supported and fixed by these seismic isolation materials. However, in a configuration in which coil springs absorb vibrations, resonance occurs depending on the natural frequency of the spring and the frequency of the input external force, which has the problem of causing the wall to move significantly.

[0006] The present invention aims to disclose a lightweight wall structure that improves upon conventional lightweight wall structures that are constrained by columns and beams, thereby preventing damage to plasterwork and surface painting on the wall surface by avoiding direct application of external forces such as strain. [Means for solving the problem]

[0007] To achieve the above objective, the present invention is based on a configuration in which a lightweight wall is installed on the interior side of the existing wall surface to create a double wall. Furthermore, the lightweight wall is connected to the existing wall surface only by vibration isolation devices. In this configuration, the lightweight wall is supported only by vibration isolation devices and not by any other means. Therefore, even if an earthquake occurs, the vibrations are first transmitted to the existing wall surface, which is the structural frame, but since the lightweight wall is supported only by vibration isolation devices, the vibrations of the existing wall surface are absorbed or reduced by the vibration isolation devices and then transmitted to the lightweight wall. In addition, multiple vibration isolation devices are provided, and a method of selectively arranging them in a matrix for both the existing wall surface and the lightweight wall is used. The matrix arrangement ensures that vibrations from the existing wall surface are transmitted uniformly to the vibration isolation devices, thus avoiding distortion of the lightweight wall due to uneven vibration.

[0008] Furthermore, the specific configuration of the vibration isolation device consisted of vibration-damping rubber, a metal plate sandwiching the vibration-damping rubber, and a support column erected from the center of the metal plate. The metal plate efficiently transmits vibrations to the vibration-damping rubber, and the support column is for attaching the vibration isolation device to other members. For the installation of the vibration isolation device to the wall, angle members were fixed to the metal plates on both sides of the vibration isolation device, with one of these angle members attached to the existing wall surface and the other angle member attached to a lightweight wall. [Effects of the Invention]

[0009] In this invention, by adopting the above-described configuration, even when vibrations such as earthquakes are input to the building's structure, the lightweight wall is connected only by the vibration isolation device. Therefore, due to the vibration absorption capacity of this vibration isolation device, vibrations are not transmitted to the lightweight wall, or are only transmitted at a reduced level. This makes it possible to prevent cracking or damage to the plasterwork or surface painting applied to the lightweight wall. [Brief explanation of the drawing]

[0010] [Figure 1] Front view of a seismic isolation wall structure according to one embodiment of the present invention. [Figure 2] Front view of the lightweight wall section. [Figure 3] Perspective view showing the vibration isolation device of the present invention [Figure 4] A side view showing the lower part of the seismic isolation wall structure. [Figure 5] Same, a side view showing the upper fitting. [Figure 6] Side view showing the fitting of the intermediate section. [Figure 7] Front view showing a conventional example [Modes for carrying out the invention]

[0011] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Figure 1 shows a seismic isolation wall structure of one embodiment from the front, and Figure 2 shows the lightweight wall portion thereof. In the figures, 1 is the existing wall surface of the building, and 2 is a lightweight wall provided on the interior side of the existing wall surface 1, and is made of, for example, ALC board. Note that the lightweight wall 2 is not rigidly connected to the existing wall surface 1, and is provided so that external forces applied to the existing wall surface 1 are not directly transmitted. This configuration is achieved by attaching the lightweight wall 2 to the existing wall surface 1 via a vibration isolation device 3 to create a double wall. As an example, the vibration isolation device 3, as shown in Figure 3, has a configuration in which a cylindrical vibration-damping rubber 4 is sandwiched between metal plates 5, 5, and support columns 6, 6 are erected in the center of these metal plates 5, 5. It is preferable to use threaded bolts as the support columns 6 so that the vibration isolation device 3 can be easily assembled to the wall surface. The vibration-damping rubber 4 itself does not need to be a configuration unique to the present invention, and known vibration-damping rubber materials can be used. Then, the lightweight wall 3 is constructed with a vibration isolation device 3 interposed between the existing wall surface 1 and the lightweight wall 2.

[0012] In the configuration for installing a lightweight wall 2 on an existing wall surface 1, first, battens 7 are installed on the existing wall surface 1 at predetermined intervals. Next, one support column 6 of the vibration isolation device 3 is fixed to these battens 7 at predetermined intervals. Then, the other support column 6 of the vibration isolation device 3 is fixed to the lightweight wall 2. In this case, as shown in the drawing, it is preferable to install the vibration isolation devices 3 at grid-like intersections, in a so-called matrix arrangement, to avoid uneven placement on the lightweight wall 2. Although the battens 7 are installed vertically in this embodiment, they can also be installed horizontally. What is necessary is to install the vibration isolation devices 3 on the lightweight wall 2 without bias. In this way, even if an external force is applied to the existing wall surface 1, the vibration isolation rubber 4 absorbs the force evenly, preventing the lightweight wall 2 from moving unevenly, concentrating stress in one area, and causing undesirable cracks or failure in that area. Here, the number of vibration isolation devices 3 to be installed is not particularly limited, but the required number is set according to the area and weight of the lightweight wall 2. In Figure 1, the lightweight wall 2 has a relatively large area, so it is arranged in a 7x4 matrix. However, if the wall surface is large, more vibration isolation devices will be needed accordingly, and if the wall surface is small, the number shown will not be necessary. In short, the total weight of the lightweight wall must be supported solely by the connection of the vibration isolation devices, so if the number of vibration isolation devices is small relative to the area of ​​the lightweight wall, deflection will occur in the lightweight wall. Conversely, if there are too many vibration isolation devices, it will hinder the flexible connection required for the vibration isolation devices and will result in extra costs. Therefore, the required number is calculated taking into account the vibration absorption capacity of the vibration-damping rubber, etc.

[0013] Regarding the installation of the vibration isolation device 3, for example, the lower part of the lightweight wall 2 will adopt a structure as shown in Figure 4. Here, the vibration isolation device 3 is fixed by sandwiching it between the angle material 8 on the existing wall surface 1 side and the angle material 9 on the lightweight wall 2 side. Each is fixed by tightening nuts onto bolts provided on the support column 6 of the vibration isolation device 3. 10 is a frame provided to protect the perimeter of the lightweight wall 2, 11 is a metal plate to support the angle material 9 from below, and 12 is a plaster wall that constitutes the surface of the lightweight wall 2. One example of a plaster wall is a fresco-like surface with a design applied to it. Also, 13 shows part of the structure of the existing wall surface 1, which is a fire-resistant board. Note that the angle material 8 on the existing wall surface 1 side is provided on the wall or column. In Figure 4, the angle material 8 on the existing wall surface 1 side is shown to be provided on a stud. The wall on the existing wall surface 1 side may be a structural wall or a partition wall, and the column does not have to be a stud.

[0014] Furthermore, the configuration shown in Figure 5 is the uppermost part of the lightweight wall 2. The vibration isolation device 3 and the angle members 8 and 9 sandwiching it are the same as in the configuration shown in Figure 4, but the metal plate 11 is not provided because it is not necessary to account for the displacement of the lightweight wall 2 relative to gravity, as is the case with the lowermost part of the configuration. The angle member 8 on the lightweight wall 2 side is directly fixed to the frame 10. Figure 6 is a cross-sectional view showing the configuration in the middle section of the lightweight wall 2, where the angle members 8 and 9 on both sides are directly fixed to the existing wall surface 1 and the lightweight wall surface 2, respectively.

[0015] In this invention, because the above-described configuration is adopted, even if an unexpected external force is applied to the building, the existing wall surface 1 and the lightweight wall 2 are stress-separated by the vibration isolation device 3. Therefore, vibrations and deflections of the existing wall surface 1 are absorbed by the vibration isolation device 3 and are not directly transmitted to the lightweight wall 3. Consequently, even in the event of sudden vibrations such as earthquakes, the strain on the lightweight wall 3 is minimized, preventing cracks in plaster walls, which are relatively susceptible to stress. Furthermore, the design applied to the surface of the lightweight wall 2 is also protected, effectively preserving expensive works of art such as murals. [Explanation of Symbols]

[0016] 1 Existing wall surface 2 Lightweight wall 3 Vibration isolator 4 Vibration isolation rubber 5 Metal plate 6 Support column 7 Crossbar 8, 9 Angle materials 10 Frame body

Claims

1. This method involves creating a double wall by installing a lightweight wall on the interior side of the existing wall surface, and the lightweight wall is connected to the existing wall surface only by a vibration isolation device. The aforementioned vibration isolation device consists only of a cylindrical vibration-damping rubber, a disc-shaped metal plate sandwiching the vibration-damping rubber, and a support column erected from the center of the metal plate. A seismic isolation wall structure in which the diameter of the metal plate is larger than the diameter of the vibration-damping rubber.

2. The seismic isolation wall structure according to claim 1, wherein multiple vibration isolation devices are provided and arranged in a matrix manner for both the existing wall surface and the lightweight wall.

3. An angle material is fixed to the metal plates on both sides of the vibration isolation device, with one of these angle materials attached to the existing wall surface and the other angle material attached to a lightweight wall, as described in claim 1 or claim 2.

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